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Home My WebLink AboutDowney Rives Mansion CEQA NOI MMRP MND Final NOTICE OF INTENT TO ADOPT MITIGATED NEGATIVE DECLARATION AND NOTICE OF PUBLIC HEARING Name of Project: Historic Rives Mansion Conversion Project Applications: Mitigated Negative Declaration, Site Plan Review (PLN-18-00061) Location: 10921 Paramount Boulevard, Downey CA 90241 Zoning/Land Use: Downtown Downey Specific Plan Project Description: The proposed Historic Rives Mansion Conversion Project includes a Site Plan Review and involves the remodel of an existing historic residential building, carriage house and water tower to create office space and includes the construction of a new retail café building. The proposed Project also includes: 1) The addition of an exterior trellis; 2) Site improvements including new paving, landscaping, exterior fencing, and hardscape; 3) Upgrading the building and site to current American Disability Act (ADA) standards; 4) Additional restrooms; 5) A new trash enclosure; 6) Twenty-eight new parking spaces; and 7) A new 6-foot emergency gate with a fire department lock box. Upon conversion, the existing Rives Mansion would have 4,845 square feet (sf) of executive offices with nine individual offices, six restrooms and accessory spaces (storage, balconies, stairs and utilities). The proposed Project would include interior modifications to Rives Mansion to create office spaces, restrooms and building upgrades to meet current building and ADA codes. The existing carriage house would include 2,400 sf of office space and the existing water tower would include 274 sf of office space and restroom facility. The new 1,200 sf retail café building would be constructed at the eastern edge of the property adjacent to a new driveway access off Paramount Boulevard. Applicant: Erika De La Teja Property Owner: Bradenton Investment Group LLC Lead Agency: City of Downey Contact Person: Guillermo Arreola, Principal Planner (562) 904-7154 garreola@downeyca.org Review Period: August 1, 2019 to August 21, 2019 Mitigated Negative Declaration 10921 Paramount Boulevard August 1, 2019 The Initial Study and Mitigated Negative Declaration will be circulated for a 21-day review period. Written comments must be received by the City of Downey Planning Division prior to 5:00 p.m. on the last date of the public review period. Purpose of Review: The purpose of this review is to allow public agencies and interested members of the public the opportunity to share expertise, disclose agency analysis, check for accuracy, detect omissions, discover public concerns, and solicit counter-proposals pursuant to CEQA Guidelines Section 15200 (Purpose of Review). Send Comments to: City of Downey – Planning Division Guillermo Arreola, Principal Planner 11111 Brookshire Avenue Downey, CA 90241 Email – garreola@downeyca.org Fax – (562) 622-4816 Documents are available for review at: City of Downey City Hall Barbara J. Riley Community Center Planning Division 7810 Quill Drive 11111 Brookshire Avenue Downey, CA 90242 Downey, CA 90241 Website – www.downeyca.org Public Hearing Scheduled: The City of Downey’s Planning Commission will conduct a public hearing to consider the applications, including the Mitigated Negative Declaration, at 6:30 p.m. on August 21, 2019, in the Council Chambers of Downey City Hall, located at 11111 Brookshire Avenue, Downey, CA. All interested parties are invited to attend and give testimony on the request. In compliance with the Americans with Disabilities Act, if you need special assistance to participate in this meeting, contact the City Clerk’s Department at 562-904-7280 or the California Relay Service at 711. Notification at least 48 hours prior to the meeting will enable the City to make arrangements to assure accessibility. The City of Downey does not discriminate on the basis of disability in admission to, access to, or operations of its programs, services or activities. Questions, concerns, complaints or requests for additional information regarding the Americans with Disabilities Act may be forwarded to the City’s ADA/Section 504 Coordinator at 11111 Brookshire Avenue, Downey, CA 90241, ADACoordiantor@downeyca.org, Phone: 562-299-6619, Fax: 562-923-6388, and California Relay 711. If you challenge the proposed actions in court, you may be limited to raising only those issues you or someone else raised at the public hearing described in this notice, or in written correspondence delivered to the Planning Division at, or prior to, the public hearing. Guillermo Arreola Principal Planner, City of Downey Publish Date: August 1, 2019 Mitigation Monitoring and Reporting Program for the Historic Rives Mansion Conversion into an Office Building and Construction of a New Café PLN-18-00061 Prepared for: City of Downey 11111 Brookshire Avenue Downey, California 90241 Contact: Guillermo Arreola, Principal Planner Prepared by: TRINITY CONSULTANTS 20 Corporate Park Suite 200 Irvine, CA 92606 Contact: Valerie Rosenkrantz, Managing Consultant JULY 2019 Printed on 30% post-consumer recycled material. Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program July 2019 TABLE OF CONTENTS Section Page No. 1 INTRODUCTION..............................................................................................................1 2 MITIGATION MONITORING AND REPORTING PROGRAM CHECKLIST .....3 TABLE 1 Mitigation Monitoring and Reporting Program Checklist .................................................. 3 Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program July 2019 INTENTIONALLY LEFT BLANK Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program July 2019 1 INTRODUCTION The California Environmental Quality Act (CEQA) requires that public agencies adopting mitigated negative declarations (MNDs) take affirmative steps to determine that approved mitigation measures are implemented subsequent to project approval. The lead or responsible agency must adopt a reporting and monitoring program for the mitigation measures incorporated into a project or included as conditions of approval. The program must be designed to ensure compliance with the MND during project implementation (California Public Resources Code, Section 21081.6(a)(1)). The Mitigation Monitoring and Reporting Program (MMRP) will be used by the City of Downey (City) as lead agency to ensure compliance with adopted mitigation measures identified in the MND for the proposed Historic Rives Mansion Conversion Project. The Project is the conversion of the existing historic residential building, carriage house and water tower into office space and the construction of a new retail building. Upon conversion, the existing Rives Mansion would have 4,845 square feet (sf) of executive offices with nine individual offices, six restrooms and accessory spaces (storage, balconies, stairs and utilities). The proposed Project would include interior modifications to Rives Mansion to create a lobby, office spaces, restrooms and building upgrades to meet current building and ADA codes. The existing carriage house would include 2,400 sf of offices and the existing water tower would include 274 sf of office space. The new 1,200 sf retail café space would be constructed at the eastern edge of the property adjacent to new driveway off Paramount Avenue. The City, as lead agency pursuant to the CEQA Guidelines (14 CCR 15000 et seq.), will ensure that all mitigation measures are carried out. Implementation of the mitigation measures would reduce impacts to below a level of significance for aesthetics, cultural resources, and tribal resources. The remainder of this MMRP consists of a table that identifies the mitigation measures by resource for each project component. Table 1 identifies the mitigation monitoring and reporting requirements, including the person(s) responsible for verifying implementation of the mitigation measure, timing of verification (prior to, during, or after construction), and responsible party. Space is provided for sign-off following completion/implementation of the mitigation measure. The source documents are the Draft MND for the project. Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program July 2019 INTENTIONALLY LEFT BLANK Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program 3 July 2019 Trinity Consultants 2 MITIGATION MONITORING AND REPORTING PROGRAM CHECKLIST Table 1 Mitigation Monitoring and Reporting Program Checklist Mitigation Measure No. Mitigation Measure Method of Verification Timing of Verification Responsible Party Completed Comments Pre Const. During Const. Post Const. Initials Date Aesthetics and Visual Resources MM-AE-1 The developer shall install a formal landscape in place of the open lawn indicated on the project plans located west of the main residence and south of the water tower. The formal landscape shall feature circulation, planting beds, design features, and plant materials consistent with the historical resource’s architectural style and period of construction. The qualified consultant (referenced in the existing mitigation measures) shall review the landscape plan and planting palette as part of the 50% and 100% project plan review. City to confirm contractor compliance X City of Downey Planning Department MM-AE-2 To protect the visual character of the existing historic Rives Mansion, the applicant must maintain the height and footprint of the proposed 1,200 sf café exactly as presented in the proposed project application. No additions, structural or mechanical, that would result in additional bulk or height to the building shall be permitted. City to confirm contractor compliance X City of Downey Planning Department Cultural Resources MM-CR-1 The developer shall retain the services of a qualified consultant architectural historian or historic architect who meets the Secretary of the Interior’s Professional Qualifications Standards to prepare a historical resources treatment plan. This historical resources treatment plan will guide the architect and contractor with the following compliance standards a) which building features and materials of the three original buildings on the property should be preserved (using the character-defining features table in Attachment C of GPA Consulting 2019 report), and b) which features and Monitor report or log X City of Downey Planning Department Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program 4 July 2019 Trinity Consultants Table 1 Mitigation Monitoring and Reporting Program Checklist Mitigation Measure No. Mitigation Measure Method of Verification Timing of Verification Responsible Party Completed Comments Pre Const. During Const. Post Const. Initials Date materials shall be repaired and which are truly beyond repair and will require replacement. MM-CR-2 The qualified consultant architectural historian or historic architect shall review the project plans at the 50% and 100% Construction Documents stages to ensure that they continue to comply with the Secretary of the Interior’s Professional Qualifications Standards. Monitor report or log X City of Downey Planning Department MM-CR-3 The qualified consultant architectural historian or historic architect shall be available to perform construction monitoring for work related to character-defining features throughout construction. Monitor report or log X City of Downey Planning Department MM-CR-4 If the need for a physical or chemical treatment arises on the three original buildings on the property, the developer shall inform the qualified consultant architectural historian or historic architect prior to administering any treatments or testing. The qualified consultant architectural historian or historic architect shall work with the developer, architect, and contractor to determine the gentlest means possible. Test patches shall be prepared in inconspicuous places prior to any wholesale treatments. Monitor report or log X City of Downey Planning Department MM-CR-5 A Qualified Archaeologist, meeting the Secretary of the Interior’s Professional Qualification Standards, shall be present for all initial ground disturbing activities associated with the proposed project. This archaeological monitor shall be responsible for the identification of cultural resources that may be impacted by project activities. The monitor may stop ground-disturbing activities in order to assess any discoveries in the field. Archaeological monitoring may be discontinued when the depth of grading and soil conditions no longer retain the potential to contain cultural deposits. The Qualified Monitor report or log X City of Downey Planning Department Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program 5 July 2019 Trinity Consultants Table 1 Mitigation Monitoring and Reporting Program Checklist Mitigation Measure No. Mitigation Measure Method of Verification Timing of Verification Responsible Party Completed Comments Pre Const. During Const. Post Const. Initials Date Archaeologist shall be responsible for determining the duration and frequency of monitoring. MM-CR-6 In the event that archaeological resources (sites, features, or artifacts) are exposed during construction activities for the proposed project, all construction work occurring within 50 feet of the find shall immediately stop until a Qualified Archaeologist can evaluate the significance of the find and determine whether additional study is warranted. Depending on the significance of the find under the California Environmental Quality Act (CEQA) and the CEQA Guidelines (California Public Resources Code, Section 21082; 14 CCR 15064.5(f)), the Qualified Archaeologist may exhaust the data potential of the find through the process of field level recordation and then allow work to continue. If the discovery proves significant under CEQA, additional work such as preparation of an archaeological treatment plan, testing, or data recovery may be warranted. Review report of finding X City of Downey Planning Department MM-CR-7 A qualified Native American monitor with Gabrieleño lineal descent shall be present for all initial ground-disturbing activities associated with the foundation for the café. The Native American monitor shall be responsible for the identification of tribal cultural resources that may be impacted by project activities. The Native American monitor may stop ground-disturbing activities in order to assess any discoveries in the field. Tribal monitoring may be discontinued when the depth of grading and soil conditions no longer retain the potential to contain cultural deposits. A Qualified Archaeologist will be retained to evaluate and appropriately treat any potentially significant discoveries. Monitor report or log X City of Downey Planning Department MM-CR-8 In the event that paleontological resources (fossil remains) are exposed during construction activities for the proposed café, all construction work occurring within 50 feet of the find shall Review report of finding X City of Downey Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program 6 July 2019 Trinity Consultants Table 1 Mitigation Monitoring and Reporting Program Checklist Mitigation Measure No. Mitigation Measure Method of Verification Timing of Verification Responsible Party Completed Comments Pre Const. During Const. Post Const. Initials Date immediately stop until a Qualified Paleontologist, as defined by the Society of Vertebrate Paleontology’s 2010 guidelines, can assess the nature and importance of the find. Depending on the significance of the find, the Qualified Paleontologist may record the find and allow work to continue or recommend salvage and recovery of the resource. All recommendations will be made in accordance with the Society of Vertebrate Paleontology’s 2010 guidelines, and shall be subject to review and approval by the City of Downey. Work in the area of the find may only resume upon approval of a Qualified Paleontologist. Planning Department MM-CR-9 In accordance with Section 7050.5 of the California Health and Safety Code, if human remains are found, the County Coroner shall be immediately notified of the discovery. No further excavation or disturbance of the site or any nearby area reasonably suspected to overlie adjacent remains shall occur until the County Coroner has determined, within two working days of notification of the discovery, the appropriate treatment and disposition of the human remains. If the County Coroner determines that the remains are, or are believed to be, Native American, he or she shall notify the Native American Heritage Commission in Sacramento within 24 hours. In accordance with California Public Resources Code, Section 5097.98, the Native American Heritage Commission must immediately notify those persons it believes to be the most likely descendant of the deceased Native American. The most likely descendant shall complete their inspection within 48 hours of being granted access to the site. The designated Native American representative would then determine, in consultation with the property owner, the disposition of the human remains. Review report of finding X City of Downey Planning Department NOISE Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program 7 July 2019 Trinity Consultants Table 1 Mitigation Monitoring and Reporting Program Checklist Mitigation Measure No. Mitigation Measure Method of Verification Timing of Verification Responsible Party Completed Comments Pre Const. During Const. Post Const. Initials Date MM-NOISE-1 The applicant shall build a 6-foot high masonry wall above finished grade on the northwest side of the project site. City to confirm construction of wall X X X City of Downey Planning Department MM-NOISE-2 The applicant shall post signage in the project delivery areas requiring that delivery trucks limit idling to 5 minutes or less; requesting back up alarms be turned off, if possible; and requesting drivers by courteous to neighbors. City to confirm installation of signage X X X City of Downey Planning Department MM-NOISE-3 In order to reduce impacts related to heavy construction equipment moving and operating on site during project construction, grading, demolition, and paving prior to issuance of grading permits, the applicant shall ensure that the following procedures are followed: o All construction equipment, fixed or mobile, shall be equipped with properly operating and maintained mufflers. o Construction noise reduction methods, such as shutting off idling equipment, maximizing the distance between construction equipment staging areas and occupied sensitive receptor areas, and using electric air compressors and similar power tools rather than diesel equipment, shall be used where feasible. City to confirm contractor compliance X City of Downey Planning Department Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program 8 July 2019 Trinity Consultants Table 1 Mitigation Monitoring and Reporting Program Checklist Mitigation Measure No. Mitigation Measure Method of Verification Timing of Verification Responsible Party Completed Comments Pre Const. During Const. Post Const. Initials Date o During construction, stationary construction equipment shall be placed so noise is directed away from or shielded from sensitive noise receptors where feasible. o During construction, stockpiling and vehicle staging areas shall be located as far as practicable from noise-sensitive receptors. o Construction shall be restricted to weekdays between the hours of 7:00 a.m. and 7:00 p.m. and Saturdays between the hours of 8:00 a.m. and 5:00 p.m. No construction shall occur on Sunday. Construction hours, allowable workdays, and the phone number of the job superintendent shall be clearly posted at all construction entrances to allow surrounding property owners and residents to contact the job superintendent. In the event the City of Downey receives a complaint, appropriate corrective actions shall be implemented, and a report of the action shall be provided to the reporting party. MM-NOISE-4 The applicant will post a sign that prohibits trash pick-up between 8:00 p.m. and 8:00 a.m. City to confirm installation of signage X X X City of Downey Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program 9 July 2019 Trinity Consultants Table 1 Mitigation Monitoring and Reporting Program Checklist Mitigation Measure No. Mitigation Measure Method of Verification Timing of Verification Responsible Party Completed Comments Pre Const. During Const. Post Const. Initials Date Planning Department Historic Rives Mansion Conversion into an Office Building and Construction of a New Café Mitigation Monitoring and Reporting Program 10 July 2019 Trinity Consultants INTENTIONALLY LEFT BLANK CITY OF DOWNEY, CALIFORNIA California Environmental Quality Act Initial Study/Mitigated Negative Declaration Historic Rives Mansion Conversion into an Office Building Prepared By: TRINITY CONSULTANTS 20 Corporate Park Suite 200 Irvine, CA 92606 (949) 567-9880 July 19, 2019 Project 180501.0213 City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants i TABLE OF CONTENTS TABLE OF CONTENTS I LIST OF FIGURES II LIST OF TABLES III 1. EXECUTIVE SUMMARY 1-1 2. PROJECT DESCRIPTION 2-1 2.1. Introduction ................................................................................................................................................................ 2-1 2.2. California Environmental Quality Act ............................................................................................................... 2-1 2.3. Project Location ........................................................................................................................................................ 2-1 2.4. Surrounding Land Uses .......................................................................................................................................... 2-5 2.5. Project Background ................................................................................................................................................. 2-6 2.6. Project Description .................................................................................................................................................. 2-7 2.7. Applicable Regulatory Requirements, Permits and Approvals ............................................................. 2-10 3. ENVIRONMENTAL CHECKLIST 3-1 3.1. Environmental Impact Areas Potentially Affected ....................................................................................... 3-1 3.2. Evaluation Of Environmental Impacts .............................................................................................................. 3-1 3.3. Determination............................................................................................................................................................ 3-3 3.4. CEQA Environmental Checklist ............................................................................................................................ 3-4 4. ACRONYMS 4-1 5. REFERENCES 5-1 City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants ii LIST OF FIGURES Figure 2-1 – Regional and Project Location 2-2 Figure 2-2 – Parcel Location 2-3 Figure 2-3 – Aerial of Existing Project Site 2-4 Figure 2-4 - Historic View of Rives Mansion 2-5 Figure 2-5 – Project Area Zoning 2-6 Figure 2-6 – Proposed Project Site Plan 2-8 Figure 2-7 – Proposed Landscaping Plan 2-9 Figure 2-8 – Proposed Demolition Plan 2-10 City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants iii LIST OF TABLES Table 3-1 - SCAQMD Air Quality Significance Thresholds 3-9 Table 3-2 - CalEEMod Construction Emissions Assumptions 3-11 Table 3-3 - Maximum Construction Emissions 3-11 Table 3-4 - Maximum Unmitigated Operational Emissions 3-12 Table 3-5 - Maximum Mitigated Operational Emissions 3-12 Table 3-6 - Compare Project with LST Thresholds at 25 Meters for Southeast LA County 3-13 Table 3-7 - Location of Non-Residential Sensitive Receptors 3-15 Table 3-8 - Worst Case Natural Gas and Electricity Use Estimates for Baseline and Proposed Operations 3-26 Table 3-9 - Proposed Project and 2020 Projected Annual Electricity and Natural Gas Usage 3-27 Table 3-10 - Current and Proposed Water Usage 3-36 Table 3-11 - Worst Case Trip Generation Estimates for Baseline and Proposed Operations 3-46 Table 3-12 - Current and Proposed Waste Generation 3-52 City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 1-1 1. EXECUTIVE SUMMARY The City of Downey received an application for a proposed conversion of the historic Rives Mansion into an office space (the proposed Rives Mansion Conversion Project or proposed Project). The proposed Project involves the remodel of an existing historic residential building, carriage house and water tower to create office space. It also includes the construction of a new café building. As this request requires the City’s Planning Commission to make a discretionary decision, a California Environmental Quality Act (CEQA) review is triggered. This Initial Study/Mitigated Negative Declaration (IS/MND) documents the proposed Project’s compliance with CEQA. The Rives Mansion is located at 10921 Paramount Boulevard on a 36,750-square-foot (sf) lot in Downey, CA. The property is bounded by Paramount Boulevard to the east, 3rd Street to the south, 7955 3rd Street to the west and an alley separating 3rd and 4th Street to the north. Known historically as the James C. Rives House, the single-family residential property was constructed in 1911. In 1977, it was listed in the National Register of Historic Places (NRHP) as a unique example of the Georgian Revival style, for its association with James C. Rives (significant local individual) and with the agricultural history of Downey. Because the Rives Mansion qualifies as a historical resource according to CEQA, the applicant hired ASM Affiliates to prepare a Historic Resource Impact Assessment Report for the proposed Rives Mansion Conversion Project on August 9, 2018; this report is incorporated into this IS/MND and is included within Appendix A. The following additional technical assessments were also prepared and are included in appendices: air quality and greenhouse gases (Appendix B), and noise (Appendix C). This IS/MND uses the most recent Initial Study Checklist included with the CEQA Guidelines Appendix G (December 2018). Based on a technical review of each CEQA checklist question, all impacts have been found to be either “no impact,” “less than significant” or “less than significant with mitigation.” Based on this technical review, the City of Downey has determined that an IS/MND is the appropriate CEQA process for the proposed Project. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 2-1 2. PROJECT DESCRIPTION 2.1. INTRODUCTION The City of Downey received an application for a proposed conversion of the Historic Rives Mansion into an office space (the proposed Rives Mansion Conversion Project or proposed Project). The proposed Project involves the remodel of an existing historic residential building, carriage house and water tower to create office space. It also includes the construction of a new café building. As this request requires the City’s Planning Commission to make a discretionary decision, a California Environmental Quality Act (CEQA) review is triggered. This Initial Study/Mitigated Negative Declaration (IS/MND) documents the proposed Project’s compliance with CEQA. 2.2. CALIFORNIA ENVIRONMENTAL QUALITY ACT CEQA Public Resources Code Section 21000 et seq., requires environmental impacts of proposed projects to be evaluated and feasible methods to reduce, avoid or eliminate significant adverse impacts of these projects to be identified and implemented. The lead agency is the public agency that has the principal responsibility for carrying out or approving a project that may have a significant adverse effect upon the environment (Public Resources Code Section 21067). The proposed Rives Mansion Conversion Project constitutes a project as defined by CEQA. The City of Downey has the primary responsibility for evaluating and approving or carrying out the entire project because the proposed Project requires discretionary approval by the City of Downey Planning Commission. Therefore, the City of Downey is the most appropriate public agency to act as lead agency (CEQA Guidelines 1 Section 15051(b)). There are no other public agencies with discretionary approval power over the proposed Project, and as such no agency will take the role of responsible agency for the proposed Project. The following is a list of any public agency that may have jurisdiction by law with respect to the proposed Project: California Department of Transportation (CalTrans), Los Angeles County Fire Department (LACFD), Los Angeles County Health Department, City of Downey Public Works, Los Angeles County Sanitation District (LACSD) and the Regional Water Quality Control Board (RWQCB). These agencies are identified as commenting agencies because they may have interest in the proposed Project but none would have discretionary approval authority. To fulfill the purpose and intent of CEQA, the City of Downey is the lead agency for this proposed Project and has prepared an IS/MND to address the potential environmental impacts associated with the proposed Project. This IS/MND informs the public, responsible agencies, and any other public agency that may have interest in the proposed Project, that the City of Downey is seeking comment on the scope and content of the IS/MND. Responses to any written comments received relating to the IS/MND will be prepared and the comment letters with responses will be included in the project staff report. 2.3. PROJECT LOCATION The Rives Mansion is located at 10921 Paramount Boulevard on a 36,750 sf lot in Downey, CA. The property is bounded by Paramount Boulevard to the east, 3rd Street to the south, 7955 3rd Street to the west and an alley separating 3rd and 4th Street to the north. Figure 2-1 depicts the regional and Project location. Figure 2-2 depicts the proposed Project parcel location within the City of Downey and Figure 2-3 shows an aerial view of 1 The CEQA Guidelines are codified at Title 14 California Code of Regulations Section 15000 et seq. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 2-2 the existing Rives Mansion property. Figure 2-4 presents a historic street view of Rives Mansion with landscaping and parking lot improvements. Source: Google Earth, 2018 Figure 2-1 – Regional and Project Location City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 2-3 Source: ASM Affiliates, 2018 Figure 2-2 – Parcel Location City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 2-4 Source: Google Earth, 2018 Figure 2-3 – Aerial of Existing Project Site City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 2-5 Source: SMS Architects, 2019 Figure 2-4 - Historic View of Rives Mansion 2.4. SURROUNDING LAND USES Rives Mansion is located on Paramount Boulevard in a busy commercial area. Most of the surrounding buildings to the east are restaurants and commercial businesses. On 3rd Street, to the west and south of the property, there is a residential neighborhood of modest one-story single-family residences dating to the 1930s and 1940s. Rives Mansion is part of the Downtown Downey Specific Plan zone. The proposed Project area zoning is shown below in Figure 2-5. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 2-6 Source: City of Downey, 2012 Figure 2-5 – Project Area Zoning 2.5. PROJECT BACKGROUND Known historically as the James C. Rives House, Rives Mansion was constructed in 1911 as a single-family residence. In 1977 it was listed in the National Register of Historic Places (NRHP). The Rives Mansion is a two-and-a-half-story single-family residence constructed in a Georgian Revival Style. It is situated on a large lot set back considerably from Paramount Boulevard (see Figures 2-3 and 2-4). ASM Affiliates prepared a Historic Resource Impact Assessment Report in August 2018 (Appendix A). The following description by ASM Affiliates captures the existing historic architectural details of Rives Mansion and its structures, which includes a carriage house and a water tower: “The primary (east) façade is dominated by a central two-story entry porch with two symmetrical pairs of ionic columns flanking the entrance. The columns support a flat roof portico with a classical architrave, frieze, and cornice with a dentil molding. Above, the original balustrade has been removed, but the porch is still accessed by a door in the gabled dormer with corner returns. Three identical dormers are located on each side of the hipped-roof home. Typical of the Georgian Revival style, the main façade is symmetrical with three bays. The central bay contains the main entrance which consists of a wood door with a central glazed panel flanked by narrow sidelights and a glazed fanlight above the door. Above the door is a second story porch with a balustrade supported by thick brackets. The porch is accessed by a pair of doors, originally glazed, with flanking sidelights. On the first story, the windows flanking the entrance have a tripartite design with central ten-over-one sash flanked by six-over-one sidelights. The Georgian-influenced sidelight over the central window originally had fanned decorative muntins but does not appear to have ever been glazed. The design on the interior windows is distinctly Proposed Project Location City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 2-7 Craftsman and the woodwork would not have been able to accommodate the fanlight. The second story windows on the primary façade are paired six-over-one sash with wood frames and sills. Similar windows are located on the secondary facades as well. Both the north and south facades have one-story porticos. On the north side, the porch is located near the east corner and supports a second-story porch with a balustrade accessed by a glazed door. The portico on the south façade was originally a porte-cochere that extended over the driveway. It was shortened to its current width when 3rd Street was widened in the 1950s. On the west façade, the kitchen area supports an additional balcony with a balustrade accessed by a glazed door. This facade has the most unique fenestration pattern that includes a rear entrance and large second-story window that may have been altered. The house is clad in narrow clapboards with a cornice and dentil molding detail below the roofline on all facades. There are two additional structures located on the property. The carriage house is located at the west end of the yard. Like the main house, the carriage house has a hipped roof with a gabled dormer punctuating the second story on each facade. The south facade has a large central door with a standard door to the west and window to the east. There are double doors located in the dormer. The west façade has a large sliding door toward the south side flanked by smaller four-light fixed sash. A pair of six-light sash is located in the dormer. The dormer on the north façade contains doors, as on the south facade, centered over a large sliding door flanked by windows (currently boarded). An additional sliding door is located near the west corner. Finally, the east façade has a standard door near the south corner and two tall double-hung sash windows. There are two six-light casement sash windows in the dormer as on the west facade (Figure 26). The carriage house is clad in narrow clapboards and few decorative details with the exception of the corner returns on the dormers. Another outbuilding is the water tower located to the east of the carriage house. It is a three-story square structure that is wider at the base and narrows at the top. It has a hipped roof and is clad with narrow clapboard siding. The top story has an arched vent on the east and west facades. The north and south facades have no windows, but each has a door at the base. The first story of the east and west facades each have a rectangular window with a smaller square window above at the second level.” (ASM Affiliates, 2018) 2.6. PROJECT DESCRIPTION The proposed Project involves the remodel of the existing historic residential building, carriage house and water tower on the Rives Mansion property to create office space. It also includes the construction of a new café building. Figure 2-6 depicts the proposed Project site plan. Landscaping improvements, parking, driveways and so forth that are part of the project are described in detail on the next page. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 2-8 Source: SMS Architects, 2019 Figure 2-6 – Proposed Project Site Plan The proposed Project includes: 1) The addition of an exterior trellis; 2) Site improvements including new paving, landscaping, exterior fencing, and hardscape; 3) Upgrading the building and site to current American Disability Act (ADA) standards; 4) Additional restrooms; 5) A new trash enclosure; 6) Twenty-eight new parking spaces; and 7) A new 6-foot wrought iron emergency gate with a fire department lock box. Upon conversion, the existing Rives Mansion would have 4,845 sf of executive offices with nine individual offices, six restrooms and accessory spaces (storage, balconies, stairs and utilities). The proposed Project would include interior modifications to Rives Mansion to create a lobby, office spaces, restrooms and building upgrades to meet current building and ADA codes. The existing carriage house would include 2,400 sf of offices and the existing water tower would include 274 sf of office space. A new 1,200 sf retail café building would be constructed at the eastern edge of the property adjacent to new driveway off Paramount Boulevard. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 2-9 The Project also involves the relocation of the existing driveway as depicted in Figure 2-6. This relocation would be necessary in order to have an ingress and egress onto the site from Paramount Boulevard. The driveway would have to be widened, which would be difficult in its current configuration due to the number of above ground and underground utilities, traffic signals, potable water service meter box, and large catch basin. In addition, the crosswalk located on Paramount Boulevard is non-compliant and lacks an ADA compliant curb ramp. As such, keeping the driveway in its existing location would not resolve the non-compliant crosswalk and curb ramp. To resolve these issues, the driveway would be relocated toward the northwest corner of the property, away from the underground utilities, storm drains, and traffic light, and would allow for an ADA compliant curb ramp. Figure 2-7 shows the proposed landscaping. Figure 2-8 shows the proposed demolition plan. Source: SMS Architects, 2019 Figure 2-7 – Proposed Landscaping Plan City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 2-10 Source: SMS Architects, 2019 Figure 2-8 – Proposed Demolition Plan The proposed Project would include demolition of the following: 1) An existing fountain; 2) Existing lawn and landscaping; and 3) Interior walls, windows and utilities for the Rives Mansion, the carriage house and the water tower. 2.7. APPLICABLE REGULATORY REQUIREMENTS, PERMITS AND APPROVALS Planning Commission review of CEQA IS/MND and proposed Site Plan Review. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-1 3. ENVIRONMENTAL CHECKLIST 3.1. ENVIRONMENTAL IMPACT AREAS POTENTIALLY AFFECTED The following environmental impact areas have been assessed to determine their potential to be affected by the proposed Project. Any checked items identify areas that may be adversely affected by the proposed Project, and as demonstrated below, no environmental impact areas are identified as being adversely impacted by the Project. An explanation relative to the determination of impacts can be found following the checklist for each area.  Aesthetics  Greenhouse Gas Emissions  Public Services  Agriculture / Forestry Resources  Hazards and Hazardous Materials  Recreation  Air Quality  Hydrology / Water Quality  Transportation  Biological Resources  Land Use / Planning  Tribal Cultural Resources  Cultural Resources  Mineral Resources  Utilities and Services Systems  Energy  Noise  Wildfire  Geology / Soils  Population / Housing  Mandatory Findings of Significance 3.2. EVALUATION OF ENVIRONMENTAL IMPACTS The environmental checklist provides a standard evaluation tool to identify a project's adverse environmental impacts. This checklist identifies and evaluates potential adverse environmental impacts that may be created by implementing the proposed Project. For the evaluation of potential impacts, the questions in the Initial Study Checklist are stated and answers are provided according to the analysis undertaken as part of the Initial Study. The analysis for each of the issue areas considers short-term (construction related), and its operational or day-to-day impacts. For each question, there are four possible responses. They include: 1. No Impact. Future development arising from the project’s implementation will not have any measurable environmental impact on the environment and no additional analysis is required. 2. Less than Significant Impact. The development associated with project implementation will have the potential to impact the environment; these impacts, however, will be less than the levels or thresholds that are considered significant and no additional analysis is required. 3. Less than Significant Impact with Mitigation Incorporated. The development will have the potential to generate impacts which will have a significant effect on the environment; however, mitigation measures will be effective in reducing the impacts to levels that are less than significant. 4. Potentially Significant Impact. Future implementation will have impacts that are considered significant, and additional analysis is required to identify mitigation measures that could reduce these impacts to less than significant levels. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-2 The following guidance applies to the evaluation of environmental impacts. 1. A brief explanation is required for all answers except “No Impact” answers that are adequately supported by the information sources a lead agency cites in the parentheses following each question. A “No Impact” answer is adequately supported if the referenced information sources show that the impact simply does not apply to projects like the one involved (e.g., the project falls outside a fault rupture zone). A “No Impact” answer should be explained where it is based on project-specific factors, as well as general standards (e.g., the project would not expose sensitive receptors to pollutants, based on a project-specific screening analysis). 2. All answers must take account of the whole action involved, including off-site as well as on-site, cumulative as well as project-level, indirect as well as direct, and construction as well as operational impacts. 3. Once the lead agency has determined that a particular physical impact may occur, then the checklist answers must indicate whether the impact is potentially significant, less than significant with mitigation, or less than significant. “Potentially Significant Impact” is appropriate if there is substantial evidence that an effect may be significant. If there are one or more “Potentially Significant Impact” entries when the determination is made, an EIR is required. 4. “Negative Declaration: Less Than Significant With Mitigation Incorporated” applies where the incorporation of mitigation measures has reduced an effect from “Potentially Significant Impact” to a “Less Than Significant Impact.” The lead agency must describe the mitigation measures, and briefly explain how they reduce the effect to a less than significant level. 5. Earlier analyses may be used where, pursuant to the tiering, program EIR, or other CEQA process, an effect has been adequately analyzed in an earlier EIR or negative declaration. Section 15063(c)(3)(D). In this case, a brief discussion should identify the following: a) Earlier Analyses Used. Identify and state where they are available for review. b) Impacts Adequately Addressed. Identify which effects from the above checklist were within the scope of and adequately analyzed in an earlier document pursuant to applicable legal standards, and state whether such effects were addressed by mitigation measures based on the earlier analysis. c) Mitigation Measures. For effects that are “Less than Significant with Mitigation Measures Incorporated,” describe the mitigation measures which were incorporated or refined from the earlier document and the extent to which they address site-specific conditions for the project. 6. Lead agencies are encouraged to incorporate into the checklist references to information sources for potential impacts (e.g., general plans, zoning ordinances). Reference to a previously prepared or outside document should, where appropriate, include a reference to the page or pages where the statement is substantiated. 7. Supporting Information Sources: A source list should be attached, and other sources used or individuals contacted should be cited in the discussion. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-4 3.4. CEQA ENVIRONMENTAL CHECKLIST I. Aesthetics. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Have a substantial adverse effect on a scenic vista?     b) Substantially damage scenic resources, including, but not limited to, trees, rock outcroppings, and historic buildings within a state scenic highway?     c) In nonurbanized areas, substantially degrade the existing visual character or quality of public views of the site and its surroundings? (Public views are those that are experienced from publicly accessible vantage point). If the project is in an urbanized area, would the project conflict with applicable zoning and other regulations governing scenic quality?     d) Create a new source of substantial light or glare which would adversely affect day or nighttime views in the area?     Significance Criteria The proposed project impacts on aesthetics will be considered significant if: - The project will block views from a scenic highway or corridor. - The project will adversely affect the visual continuity of the surrounding area. - The project would conflict with applicable zoning and other regulations governing scenic quality. - The impacts on light and glare will be considered significant if the project adds lighting which would add glare to residential areas or sensitive receptors. - The impact would minimize the visual character of historic properties visible to the public from streets and other properties. Discussion Ia). The City of Downey, which is located in southeast Los Angeles County, is an urban environment. There are no scenic vistas, scenic resources or scenic highways within the City boundaries or any visible from within the City (City of Downey, 2004). City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-5 Ib) Less than Significant Impact with Mitigation. The City of Downey recognizes that its cultural resources enhance Downey’s Image. The General Plan encourages the upgrade of property appearance during the development review process. The General Plan also calls that the City focus efforts on enhancing the appearance of properties as viewed from streets. This goal is more critical for historic properties because historic resources are also scenic resources. The Project involves changes to the site including a new café building, driveways, parking areas, landscaping, lawns and hardscape. With the introduction of additional paved areas (parking and driveways), the visual resource of the property could be significantly impacted. Proper enhancement is necessary to safeguard the visual resource of the property. The proposed lawn located west of the main residence and south of the water tower, lacks a garden and plant types that are appropriate for the period and architectural style which in combination with the new paved areas, would significantly impact the scenic resource. To mitigate this potential impact to a less than significant level, the applicant shall implement MM-AE- 1. MM-AE-1. The developer shall install a formal landscape in place of the open lawn indicated on the project plans located west of the main residence and south of the water tower. The formal landscape shall feature circulation, planting beds, design features, and plant materials consistent with the historical resource’s architectural style and period of construction. The qualified consultant (referenced in the existing mitigation measures) shall review the landscape plan and planting palette as part of the 50% and 100% project plan review. Ic) Less than Significant Impact with Mitigation. The request to change the use of the existing site would not degrade the existing visual character or quality of the site and its surroundings. The exterior of the historic properties would be improved with paint and other restorative treatments as well as include the addition of the new 1,200 sf café. If approved, the applicant will have to submit development plans to comply with the development standards of the Downey Municipal Code (DMC). The standards adopted within the DMC are intended to regulate development so as to not negatively impact the visual character of the site or its surroundings. The Project also involves the relocation of the existing driveway. This relocation would be necessary in order to have ingress and egress onto the site off Paramount Boulevard, the driveway would have to be widened, which would be difficult due to the number of above ground and underground utilities, traffic signals, potable water service meter box, and large catch basin. In addition, the crosswalk located on Paramount Boulevard is non-compliant and lacks an ADA compliant curb ramp. As such, keeping the driveway in its existing location would not resolve the non-compliant crosswalk and curb ramp. To resolve this situation, the driveway would be relocated toward the northwest corner of the property, away from the underground utilities, storm drains, and traffic light, and would allow for an ADA compliant curb ramp. The proposed relocation of the driveway leads to the relocation of the proposed café south of the driveway, which would be partially in front of the Rives Mansion. This relocation is necessary in order to accommodate an ADA compliant crosswalk and curb ramp, which would improve both vehicle and pedestrian safety on Paramount Boulevard. The construction of the proposed café would change the visual character of the historic Rives Mansion. While there is no clear measure of significance, the Rives Mansion is an existing historic building within the City of Downey. Any change to the visual appearance could create a potentially significant impact. To mitigate this potential impact to a less than significant level, the applicant shall implement MM-AE-2. MM-AE-2 To protect the visual character of the existing historic Rives Mansion, the applicant must maintain the height and footprint of the proposed 1,200 sf café exactly as presented in the proposed City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-6 project application. No additions, structural or mechanical, that would result in additional bulk or height to the building shall be permitted. For these reasons, with implementation of MM-AE-2, the request to change the use of the existing site would not adversely degrade the existing visual character or quality of the site and its surroundings and this would be a less than significant aesthetic impact. Id) Less than Significant Impact. The proposed conversion Project site could include additional exterior lighting and any new lighting must comply with the development standards within the DMC. Pursuant to DMC Section 9520.06, all outdoor lighting much be directed, positioned, and/or shielded as not to direct light on any street or abutting property. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on aesthetics would be expected. Since no potentially significant adverse aesthetic resource impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-7 II. Agriculture and Forestry Resources. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact In determining whether impacts to agricultural resources are significant, environmental effects, lead agencies may refer to the California Agricultural Land Evaluation and Site Assessment Model (1997) prepared by the California Dept. of Conservation as an optional model to use in assessing impacts on agriculture and farmland. In determining whether impacts to forest resources, including timberland, are significant environmental effects, lead agencies may refer to information compiled by the California Department of Forestry and Fire Protection regarding the state’s inventory of forest land, including the Forest and Range Assessment Project and the Forest Legacy Assessment project; and forest carbon measurement methodology provided in Forest Protocols adopted by the California Air Resources Board. Would the project: a) Convert Prime Farmland, Unique Farmland, or Farmland of Statewide Importance (Farmland), as shown on the maps prepared pursuant to the Farmland Mapping and Monitoring Program of the California Resources Agency, to non-agricultural use?     b) Conflict with existing zoning for agricultural use, or a Williamson Act contract?     c) Conflict with existing zoning for, or cause rezoning of, forest land (as defined in Public Resources Code Section 12220(g)), timberland (as defined by Public Resources Code Section 4526), or timberland zoned Timberland Production (as defined by Government Code Section 51104(g))?     d) Result in the loss of forest land or conversion of forest land to non-forest use?     e) Involve other changes in the existing environment which, due to their location or nature, could result in conversion of Farmland, to non-agricultural use or conversion of forest land to non-forest use?     Significance Criteria Project-related impacts on agriculture and forest resources will be considered significant if any of the following conditions are met: - The proposed Project conflicts with existing zoning or agricultural use or Williamson Act contracts. - The proposed Project would convert prime farmland, unique farmland or farmland of statewide importance as shown on the maps prepared pursuant to the farmland mapping and monitoring program of the California Resources Agency, to non-agricultural use. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-8 - The proposed Project conflicts with existing zoning for, or causes rezoning of, forest land (as defined in Public Resources Code §12220 (g)), timberland (as defined in Public Resources Code §4526), or timberland zoned Timberland Production (as defined by Government Code § 51104 (g)). - The proposed Project would involve changes in the existing environment, which due to their location or nature, could result in conversion of farmland to non-agricultural use or conversion of forest land to non-forest use. Discussion IIa, IIb and IIe) No impact. The City of Downey is an urbanized area that is mostly built out with only infill development potential. There are no agricultural lands within the City’s boundaries. The Project would have no impact on converting Prime Farmland, Unique Farmland, or Farmland of Statewide Importance. Furthermore, the City’s General Plan (Vision 2025) does not include provisions for agricultural uses in the future (Downey, 2004). While the City does have a variety of zoning districts, agricultural uses are only allowed in the Open Space (O-S) zone. The Downey Rives Mansion conversion site is neither within nor adjacent to any O-S zones. Therefore, no impacts to agricultural resources would occur with implementation of the proposed Project. IIc) No impact. The City of Downey is an urbanized area that is mostly built out with only infill development potential. There are no forest or timberland lands within the City’s boundaries. Therefore, the Project would not conflict with existing zoning for, or cause rezoning of, forest land,2 timberland,3 or timberland zoned Timberland Production.4 IId) No impact. The City of Downey is an urbanized area that is mostly built-out with only infill development potential. There are no forest lands within the City’s boundaries. Therefore, the Project would not result in the loss of forest land or conversion of forest land to non-forest use. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on agriculture and forestry resources would be expected. Since no potentially significant adverse agriculture and forestry resource impacts were identified, no mitigation measures are required. 2 As defined in Public Resource Code 12220(g) 3 As defined in Public Resource Code 4526 4 As defined in Government Code Section 51104(g) City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-9 III. Air Quality. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Conflict with or obstruct implementation of the applicable air quality plan?     b) Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable federal or state ambient air quality standard?     c) Expose sensitive receptors to substantial pollutant concentrations?     d) Result in other emissions (such as those leading to odors) adversely affecting a substantial number of people?     Significance Criteria The significance of impacts from construction, operational non-permitted equipment and activities, and operational permitted equipment and activities are evaluated separately. A project would be determined to have a significant impact on air quality if the emissions sum for any criteria pollutant exceeds its respective threshold of significance. The South Coast Air Quality Management District (SCAQMD) thresholds of significance for criteria pollutant emissions are presented below in Table 3-1. Table 3-1 - SCAQMD Air Quality Significance Thresholds Mass Daily Thresholds a Pollutant Construction b Operation c NOx 100 lbs/day 55 lbs/day VOC 75 lbs/day 55 lbs/day PM10 150 lbs/day 150 lbs/day PM2.5 55 lbs/day 55 lbs/day SOx 150 lbs/day 150 lbs/day CO 550 lbs/day 550 lbs/day Lead 3 lbs/day 3 lbs/day Toxic Air Contaminants (TACs), Odor, and GHG Thresholds TACs (including carcinogens and non-carcinogens) Maximum Incremental Cancer Risk ≥ 10 in 1 million Cancer Burden > 0.5 excess cancer cases (in areas ≥ 1 in 1 million) Chronic & Acute Hazard Index ≥ 1.0 (project increment) Odor Project creates an odor nuisance pursuant to SCAQMD Rule 402 GHG 10,000 MT/yr CO2eq for industrial facilities 3,000 MT/yr CO2eq for commercial facilities Ambient Air Quality Standards for Criteria Pollutants d NO2 SCAQMD is in attainment; project is significant if it causes or contributes to an exceedance of the following attainment standards: City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-10 1-hour average annual arithmetic mean 0.18 ppm (state) 0.03 ppm (state) and 0.0534 ppm (federal) PM10 24-hour average annual average 10.4 µg/m3 (construction)e & 2.5 µg/m3 (operation) 1.0 µg/m3 PM2.5 24-hour average 10.4 µg/m3 (construction)e & 2.5 µg/m3 (operation) SO2 1-hour average 24-hour average 0.25 ppm (state) & 0.075 ppm (federal – 99th percentile) 0.04 ppm (state) Sulfate 24-hour average 25 µg/m3 (state) CO 1-hour average 8-hour average SCAQMD is in attainment; project is significant if it causes or contributes to an exceedance of the following attainment standards: 20 ppm (state) and 35 ppm (federal) 9.0 ppm (state/federal) Lead 30-day Average Rolling 3-month average 1.5 µg/m3 (state) 0.15 µg/m3 (federal) at or below 0.110 µg/m3 through December 31, 2016 and at or below 0.100 µg/m3 on and after January 1, 2017 (SCAQMD Rule 1420.1) a Source: SCAQMD CEQA Handbook (SCAQMD, 1993), Revision: March 2015 b Construction thresholds apply to both the South Coast Air Basin and Coachella Valley (Salton Sea and Mojave Desert Air Basins). c For Coachella Valley, the mass daily thresholds for operation are the same as the construction thresholds. d Ambient air quality thresholds for criteria pollutants based on SCAQMD Rule 1303, Table A-2 unless otherwise stated. e Ambient air quality threshold based on SCAQMD Rule 403. KEY: lbs/day = pounds per day ppm = parts per million µg/m3 = microgram per cubic meter ≥ = greater than or equal to MT/yr CO2eq = metric tons per year of CO2 equivalents > = greater than Construction Source Emissions Construction of the proposed Project would conservatively begin in September 2019 and be completed in approximately five months. This analysis uses California Emissions Estimator Model (CalEEMod) version 2016.3.2 to estimate the construction emissions for the Project (California Air Pollution Control Officers Association, (CAPCOA), 2017). The Project emissions were assessed in two separate model runs: 1) new construction of the café building, and 2) the renovation of the three existing buildings into office buildings. Model defaults for 1,200 sf of a High Turnover (Sit Down Restaurant) were used for the new café building and are summarized in Table 3-2. Model defaults for a General Office Building were used for the renovation of the three existing buildings. No external construction is expected for the renovation of existing buildings; therefore, no construction off-road equipment is expected for this section of the Project. The only expected construction emissions for building renovation are from worker and vendor trips to the site. Table 3-3 presents a summary of construction emissions for both the new café building and the renovation of the three existing buildings. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-11 Table 3-2 - CalEEMod Construction Emissions Assumptions CalEEMod Defaults for High Turnover (Sit Down Restaurant) 1,200 square feet Equipment Number HP Hours/Day Site Preparation Graders 1 187 8 Tractor/Loader/ Backhoes 1 97 8 Grading Concrete/ Industrial Saws 1 81 8 Rubber Tired Dozer 1 247 1 Tractor/Loader/Backhoe 2 97 6 Building Construction Cranes 1 231 4 Forklifts 2 89 6 Tractor/Loader/ Backhoe 2 97 8 Architectural Coating Air Compressors 1 78 6 Paving Cement and Mortar Mixers 4 9 6 Pavers 1 130 7 Rollers 1 80 7 Tractor/Loader/ Backhoe 1 97 7 Defaults taken from CalEEMod 2016.3.2 for a High Turnover (Sit Down Restaurant) Table 3-3 - Maximum Construction Emissions Criteria Pollutants (lb/day) Greenhouse Gas (MT/year) ROG NOx CO SO2 PM10 PM2.5 CO2 CH4 N2O CO2e New Café 2.48 9.83 8.17 0.01 0.94 0.70 45.03 0.01 0.00 45.38 Renovations 13.96 0.14 2.99 0.001 0.07 0.02 3.077 0.00 0.00 3.08 Total 16.43 9.97 11.17 0.014 1.02 0.73 48.11 0.01 0.00 48.46 SCQAMD Thresholds 75 100 550 150 150 55 NA NA NA 3,000 Exceed Thresholds? (Yes/No) No No No No No No No No No No Source: Trinity Consultants, 2019 Operational Source Emissions Operation of the proposed Project is assumed to begin after construction ends in February, 2020. This analysis uses CalEEMod 2016.3.2 to estimate emissions from both the new café building and the renovated office buildings. CalEEMod defaults for a High Turnover (Sit Down Restaurant) and for General Office Building were used. Table 3-4 presents a summary of operational emissions prior to the application of CalEEMod’s mobile mitigation measures, and Table 3-5 reflects the inclusion of those measures. These CalEEMod mobile mitigation measures technically reflect the existing urban design features of the Project area and include: City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-12 Improve Walkability Design Improve Destination Accessibility Increase Transit Accessibility Improve Pedestrian Network The proposed Project is not expected to exceed any SCAQMD thresholds for operational emissions with and without the existing urban design parameters. Because these urban design parameters reflect existing actual conditions and the proposed Project will make no additional physical modifications off-site, there are no CEQA mitigation measures as part of this proposed Project. Table 3-4 - Maximum Unmitigated Operational Emissions Criteria Pollutants (lb/day) Greenhouse Gas (MT/year) ROG NOx CO SO2 PM10 PM2.5 CO2 CH4 N2O CO2e New Café 0.32 1.26 2.73 0.01 0.56 0.16 140.1 0.19 0.002 145.1 Renovations 0.34 0.83 2.30 0.01 0.58 0.16 136.3 0.13 0.001 140.1 Total 0.66 2.09 5.02 0.02 1.14 0.32 276.4 0.33 0.002 285.2 SCAQMD Thresholds 55 55 550 150 150 55 NA NA NA 3,000 Exceed Thresholds (Yes/No) No No No No No No No No No No Source: Trinity Consultants, 2019 Table 3-5 - Maximum Mitigated Operational Emissions Criteria Pollutants (lb/day) Greenhouse Gas (MT/year) ROG NOx CO SO2 PM10 PM2.5 CO2 CH4 N2O CO2e New Café 0.28 0.93 1.49 0.004 0.20 0.06 80.0 0.19 0.00 84.9 Renovations 0.29 0.49 1.03 0.003 0.20 0.06 79.9 0.13 0.001 83.61 Total 0.58 1.43 2.62 0.007 0.40 0.12 159.9 0.32 0.002 168.5 SCAQMD Thresholds 55 55 550 150 150 55 NA NA NA 3,000 Exceed Thresholds (Yes/No) No No No No No No No No No No Source: Trinity Consultants, 2019 Operational Impacts to Localized Ambient Air Quality Localized Significance Thresholds (LSTs) developed by SCAQMD to readily determine if the daily emissions for proposed construction or operational activities could result in significant localized air quality impacts (SCAQMD, 2008). LSTs represent the maximum emissions from a project that are not expected to cause or contribute to an exceedance of the most stringent applicable federal or state ambient air quality standard, and are developed based on the ambient concentrations of that pollutant for each source receptor area and distance to the nearest sensitive receptor. LSTs are only applicable to NOx, CO, PM10 and PM2.5. For PM10, LSTs were derived based on requirements in SCAQMD Rule 403 – Fugitive Dust. LSTs apply to projects that must undergo an environmental analysis pursuant to CEQA and are five acres or less. The proposed Project impact area is less than one acre. Table 3-6 summarizes the LST allowable emissions for a one acre project in Area 3, Southwest Coastal LA County, at 25 meters from the site boundary. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-13 Table 3-6 provides the comparison of the proposed Project’s maximum daily mitigated emissions with applicable LST thresholds. Based on this review and the fact that the nearest residential receptor is approximately within 25 meters to the north, the proposed Project is not expected to cause or contribute to an exceedance of the most stringent applicable federal or state ambient air quality standard. Table 3-6 - Compare Project with LST Thresholds at 25 Meters for Southeast LA County Pounds per Day NOx CO PM10 PM2.5 Operations Comparison LST Operations Threshold at 25 meters 80 571 1 1 Project Operations Emissions (Table 5) 1.43 2.62 0.40 0.12 Exceed LST Threshold? No No No No Construction Comparison 1 LST Construction Threshold at 25 meters NA NA 4 3 Project Construction Emissions (Table 3) NA NA 1.02 0.73 Exceed LST Threshold? -- -- No No Note: (1) Only PM10 and PM2.5 have different LST values for construction and operation. Source: SCAQMD 2008, Appendix C – Mass Look up Tables CO Hot Spots The potential for high concentrations of CO emissions associated with truck and vehicle traffic was considered and evaluated in accordance with the requirements of the SCAQMD CEQA Air Quality Handbook (SCAQMD, 1993). The Handbook indicates that any project that could negatively impact levels of service at local intersections may create a CO hot spot and should be evaluated. The additional traffic would generate no more than 14 additional truck trips per day and 152 gasoline passenger trips on a peak day at full operations of the proposed Project. These trips, spread out over 24 hours, could conservatively result in one additional truck trip and seven additional vehicle trips per peak hour. This level of additional truck and vehicle trip activity would have no measurable change on peak-hour intersection level-of-service. Therefore, potential impacts on CO emissions due to additional truck and vehicle traffic at area intersections near the proposed Project would not adversely affect peak hour intersection level-of-service. Cumulative Impacts The SCAQMD guidance on addressing cumulative impacts for air quality is as follows: “As Lead Agency, the SCAQMD uses the same significance thresholds for project specific and cumulative impacts for all environmental topics analyzed in an Environmental Assessment or EIR.” “Projects that exceed the project-specific significance thresholds are considered by the SCAQMD to be cumulatively considerable. This is the reason project-specific and cumulative significance thresholds are the same. Conversely, projects that do not exceed the project-specific thresholds are generally not considered to be cumulatively significant.” Appendix D (Cumulative Impact Analysis Requirements Pursuant to CEQA) of the SCAQMD Cumulative Impacts Working Group 2003 White Paper summarizes the SCAQMD approach to the preparation of cumulative air quality analysis (SCAQMD, 2003). This approach was upheld by the Court in Citizens for Responsible Equitable Environmental Development v. City of Chula Vista (2011) 197 Cal. App. 4th 327, 334. The Court determined that where it can be found that a project did not exceed the SCAQMD’s established air quality significance thresholds, the City of Chula Vista properly concluded that the project would not cause a significant environmental effect, nor result in a cumulatively City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-14 considerable increase in these pollutants. The court found this determination to be consistent with CEQA Guidelines §15064.7, stating, “The lead agency may rely on a threshold of significance standard to determine whether a project will cause a significant environmental effect.” The court found that, “Although the project will contribute additional air pollutants to an existing nonattainment area, these increases are below the significance criteria…” “Thus, we conclude that no fair argument exists that the project will cause a significant unavoidable cumulative contribution to an air quality impact.” As in Chula Vista, here the SCAQMD has demonstrated, when using accurate and appropriate data and assumptions, that the Project would not exceed the established SCAQMD significance thresholds. See also, Rialto Citizens for Responsible Growth v. City of Rialto (2012) 208 Cal. App. 4th 899. Again, the court upheld the SCAQMD’s approach to utilizing the established air quality significance thresholds to determine whether the impacts of a project would be cumulatively considerable. Toxic Air Contaminants The proposed Project includes three office buildings and a café. These buildings are not expected to release any toxic air contaminants. The current usage of the Project site expects an average of 3 truck trips per day. An average of 14 truck trips per day is expected from the proposed Project, which is an increase in 11 truck trips per day., which is substantially less than the 100 truck trips per day SCAQMD’s typically applies as the threshold for determining that a health risk assessment for toxic air contaminants is required. Discussion IIIa) Less than Significant Impact. As discussed in Checklist Section IIIb) below, the proposed Project would not exceed SCAQMD’s thresholds for criteria pollutants from construction or operations. In addition, operations-related traffic would not result in CO hotspots where ambient air quality standards would be exceeded near roadways. As discussed in Checklist Section IIIc) below, the proposed Project would not result in substantial emissions of toxic air contaminants (TACs) and would not exceed SCAQMD’s LST thresholds at 25 meters; therefore, nearby receptors would not be exposed to substantial pollutant concentrations. As discussed in Checklist Section IIId) below, there are no odors associated with the proposed Project and the proposed Project will not adversely affect a substantial number of people. Since the proposed Project will have a less than significant impact on the above factors, the proposed Project would have a less than significant impact on implementation of any applicable air quality plan. IIIb) Less than Significant Impact. This evaluation is based on estimated emissions of criteria air pollutants modeled using CalEEMod 2016.3.2 and CARB’s EMission FACtors 2017 (EMFAC2017) model (and described above under Methodology, Construction Emissions and Operational Emissions). The SCAQMD has designated significant emission levels for criteria pollutants to evaluate regional air quality impact significance under CEQA. These emission levels are presented above in Table 1, SCAQMD Air Quality Significance Thresholds. Projects that exceed these emission thresholds are considered to have a significant air quality impact. This Project would result in temporary emissions of air pollutants during construction and emissions of air pollutants during the extent of operation. Air pollutant emissions during construction are due to the use of construction equipment. CalEEMod 2016.3.2 was used to estimate construction emissions. The maximum daily emissions for each criteria pollutant are listed in Table 3-3, Maximum Construction Emissions. As demonstrated in Table 3-3, the potential maximum daily construction emissions are well below the SCAQMD CEQA thresholds. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-15 Operation of the office buildings and café would result in an increase of air pollutants due to office and café activities as well as an increase in consumer traffic. Operational emissions were estimated using CalEEMod 2016.3.2. Table 3-4, Maximum Unmitigated Operational Emissions shows the maximum operational emissions of criteria pollutants. As demonstrated in Table 3-4, the potential maximum daily operational emissions are well below the SCAQMD CEQA thresholds. An evaluation of LSTs developed by the SCAQMD to determine if the daily emissions for proposed construction or operational activities could result in significant localized air quality impacts are presented above in Table 3-6. As demonstrated in Table 3-6, the potential maximum daily operational emissions are well below the SCAQMD LST thresholds for 25 meters. As discussed above, air quality impacts from the construction and operational activities associated with implementing the proposed Project would result in less than significant air quality impacts. The analyses demonstrate that the SCAQMD’s significance thresholds, which also serve as the cumulative significance threshold for construction and operation, would not be exceeded for any pollutant. In addition, CEQA Guidelines Section 15064 (h)(4) states, “The mere existence of significant cumulative impacts caused by other projects alone shall not constitute substantial evidence that the proposed project’s incremental effects are cumulatively considerable.” For this reason, air quality impacts are not considered to be cumulatively considerable pursuant to CEQA Guidelines §15064 (h)(1) and therefore, no significant adverse cumulative construction and operational air quality impacts are expected to occur. To summarize, the proposed Project would not exceed SCAQMD thresholds for construction and operational emissions. The proposed Project would therefore have a less than significant impact on air quality standards, and thus would not result in a cumulative considerable air quality impact. No mitigation measures would be required. IIIc) Less Than Significant Impact. The location of nearby non-residential sensitive receptors is detailed in Table 3-7. Table 3-7 - Location of Non-Residential Sensitive Receptors Receptor Name Address Distance (miles) Rio Hondo Elementary School 7731 Muller St, Downey 0.41 N Montessori Children’s Academy 7515 Firestone Blvd, Downey 0.51 NW Williams Elementary School 7530 Arnett St, Downey 0.60 SW Warren High School 8141 De Palma St, Downey 0.60 S Downey High School 11040 Brookshire Ave, Downey 0.63 SE Kirkwood Christian Schools 10822 Brookshire Ave, Downey 0.64 SE PIH Health Hospital 11500 Brookshire Ave, Downey 0.78 S Griffiths Middle School 9633 Tweedy Ln, Downey 0.99 N Maude Price Elementary School 9525 Tweedy Ln, Downey 1.14 N Stauffer Middle School 11985 Old River School Rd, Downey 1.16 SW Old River Elementary School 11995 Old River School Rd, Downey 1.19 SW Alameda Elementary School 8613 Alameda St, Downey 1.26 S St. Raymond School 12320 Paramount Blvd, Downey 1.35 S Gallatin Elementary School 9513 Brookshire Ave, Downey 1.33 NE Rio San Gabriel Elementary School 9338 Gotham St, Downey 1.46 E Doty Middle School 10301 Woodruff Ave, Downey 1.40 E City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-16 Suva Elementary School 6740 Suva St, Bell Gardens 1.52 NW Imperial Elementary School 8133 Imperial Hwy, Downey 1.56 S Garfield Elementary School 7425 Garfield Ave, Bell Gardens 1.58 NW Sussman Middle School 12500 Birchdale Ave, Downey 1.62 S Suva Intermediate School 6660 Suva St, Bell Gardens 1.62 NW Kaiser Permanente 9333 Imperial Hwy, Downey 1.77 S Unsworth Elementary School 9001 Lindsey Ave, Downey 1.86 NE A L Gauldin Elementary School 9724 Spry St, Downey 1.94 SE Source: Google Earth Pro version 7.1.8.3036 The nearest residents are immediately adjacent to the proposed Project location. The nearest school receptor is 0.41 miles north of the proposed Project. The proposed Project is expected to have an average of 14 truck trips per day and a maximum of 17 truck trips per day, which is substantially less than the 100 truck trips per day SCAQMD typically applies as the threshold for determining that a health risk assessment is required. The Project construction and operations emissions presented above in Tables 3-3, 3-4 and 3-5 would be less than the SCAQMD’s significance thresholds outlined in Table 3-1. For these reasons, the proposed Project would not expose sensitive receptors to substantial pollutant concentrations. The proposed Project would therefore have less than significant impacts on sensitive receptors. No mitigation measures would be required. IIId) Less than Significant Impact. The proposed Project would include three office buildings and one café. There are no odors associated with these buildings. The construction and operation of the proposed Project is not expected to result in a substantial increase in odors, and therefore the potential for odor impacts would be less than significant. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on air quality would be expected. Since no potentially significant adverse air quality impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-17 IV. Biological Resources. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Have a substantial adverse effect, either directly or through habitat modifications, on any species identified as a candidate, sensitive, or special status species in local or regional plans, policies, or regulations, or by the California Department of Fish and Wildlife or U.S. Fish and Wildlife Service?     b) Have a substantial adverse effect on any riparian habitat or other sensitive natural community identified in local or regional plans, policies, regulations or by the California Department of Fish and Wildlife or U.S. Fish and Wildlife Service?     c) Have a substantial adverse effect on state or federally protected wetlands (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption, or other means?     d) Interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors, or impede the use of native wildlife nursery sites?     e) Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance?     f) Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Community Conservation Plan, or other approved local, regional, or state habitat conservation plan?     Significance Criteria Impacts on biological resources will be considered significant if any of the following criteria apply: - The project results in a loss of plant communities or animal habitat considered to be rare, threatened or endangered by federal, state or local agencies. - The project interferes substantially with the movement of any resident or migratory wildlife species. - The project adversely affects aquatic communities through construction or operation of the project. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-18 Discussion IVa) No impact. According to the Environmental Impact Report prepared for the City of Downey General Plan, there is no species identified as a candidate, sensitive, or special species in local, regional, state, or federal documents within the City of Downey (City of Downey, 2004). There are no known candidate, sensitive, or special status species that reside on the site. Further, the site is previously developed and urbanized. Therefore, there would be no impact from the proposed Project. IVb) No impact. There are no riparian habitats or other sensitive natural communities identified in local or regional plans, policies, and regulations or by the California Department of Fish and Wildlife or U.S. Fish and Wildlife Service. Moreover, the three river channels that are located within the boundaries of the City of Downey (Rio Hondo Channel, Los Angeles River, and San Gabriel River) are cement- or riprap-lined and support limited vegetation. Further, the site is previously developed and urbanized. For these reasons, there would be no impact from the proposed Project. IVc) No impact. Based on a March 2018 review of the National Wetlands Inventory, there are no protected wetlands in the immediate area of the Project site (U.S. Fish and Wildlife Service, 2018). Further, the site is previously developed and urbanized. For these reasons, there would be no impact from the proposed Project. IVd) No impact. No movement of any native resident or migratory fish or wildlife species or established native resident migratory wildlife corridors, or use of native wildlife nursery sites has been identified in the City of Downey (City of Downey, 2004). Accordingly, the proposed Project would not impact the movement of any native resident or migratory fish or wildlife species or with established native resident migratory wildlife corridors. For this reason, there would be no impact from the proposed Project. IVe) No impact. The City of Downey does not have any local ordinance to protect biological resources. For this reason, there would be no impact from the proposed Project. IVf) No impact. There is no adopted Habitat Conservation Plan, Natural Community Plan, or other habitat conservation plan. For this reason, there would be no impact from the proposed Project. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on biological resources would be expected. Since no potentially significant adverse biological resource impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-19 V. Cultural Resources. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Cause a substantial adverse change in the significance of a historical resource pursuant to § 15064.5?     b) Cause a substantial adverse change in the significance of an archaeological resource pursuant to § 15064.5?     c) Disturb any human remains, including those interred outside of dedicated cemeteries?     Significance Criteria Impacts to cultural resources will be considered significant if: - The project results in the disturbance of a significant prehistoric or historic archaeological site or a property of historic, or cultural significance. - The project would disturb human remains. The proposed Project involves the conversion of Rives Mansion, known historically as the James C. Rives House, into office space. Rives Mansion was constructed in 1911 as a single-family residential building. When completed in 1912, the Rives Mansion was by far the most imposing residence in the community of Downey. The structure was built for James C. Rives, one of Downey’s most prominent citizens at that time. The Georgian Revival structure was the most elegant residence in the area, an adaptation of a style which was very popular in southern California in the first two decades of the twentieth century. The structure exhibited many details such as Ionic columns which made it architecturally unique in its area and an important visual landmark for local citizens and visitors. In 1977, the Rives Mansion was listed in the National Register of Historic Places (NRHP), and in 1978 it was listed in the California Register of Historical Resources (CRHR) and therefore qualifies as a historic resource. Alterations to the structure have been minimal since its construction in 1911. Minor modifications have taken place in the interior, which is almost in its original condition. The City of Downey has reviewed the Project and provided a Historical Resources Technical Memorandum describing their findings (GPA Consulting, 2019). This review included an impact assessment using the Secretary of the Interiors Standards for the Treatment of Historic Properties (Standards). The Rehabilitation Standards are applicable to the proposed Project, because Rehabilitation pertains to change of use and discusses new construction and the proposed Project involves converting the main house form residential to office use, as well as construction of a new building and associated site features (GPA Consulting, 2019). The Rehabilitation Standards include: 1. A property will be used for its historic purpose or be placed in a new use that requires minimal change to the defining characteristics of the building and its site and environment. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-20 2. The historic character of a property will be retained and preserved. The removal of historic materials or alteration of features and spaces that characterize a property will be avoided. 3. Each property will be recognized as a physical record of its time, place, and use. Changes that create a false sense of historical development, such as adding conjectural features or architectural elements from other buildings, will not be undertaken. 4. Most properties change over time; those changes that have acquired historic significance in their own right will be retained and preserved. 5. Distinctive features, finishes, and construction techniques or examples of craftsmanship that characterize a property will be preserved. 6. Deteriorated historic features will be repaired rather than replaced. Where the severity of deterioration requires replacement of a distinctive feature, the new feature will match the old in design, color, texture, and other visual qualities and, where possible, materials. Replacement of missing features will be substantiated by documentary, physical, or pictorial evidence. 7. Chemical or physical treatments, such as sandblasting, that cause damage to historic materials will not be used. The surface cleaning of structures, if appropriate, will be undertaken using the gentlest means possible. 8. Significant archeological resources affected by a project will be protected and preserved. If such resources must be disturbed, mitigation measures will be undertaken. 9. New additions, exterior alterations, or related new construction will not destroy historic materials that characterize the property. The new work will be differentiated from the old and will be compatible with the massing, size, scale, and architectural features to protect the historic integrity of the property and its environment. 10. New additions and adjacent or related new construction will be undertaken in such a manner that if removed in the future, the essential form and integrity of the historic property and its environment would be unimpaired. The City’s review of the historical resource impacts also included a review of the CEQA Impact Thresholds. Projects involving historical resources that comply with the Standards may qualify for a Categorical Exemption (CE) under CEQA as long as there are no other potential environmental impacts; however, not complying with the Standards does not automatically mean that a project would have a negative impact on a historical resource (GPA Consulting, 2019). The State CEQA Guidelines set the standard for determining the significance of impacts to historical resources in Title 14 California Code of Regulations Section 15064.5(b), which states: A project with an effect that may cause a substantial adverse change in the significance of an historical resource is a project that may have a significant effect on the environment. Title 14 California Code of Regulations Section 15064.5(b)(1) further clarifies “substantial adverse change” as follows: City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-21 Substantial adverse change in the significance of an historical resource means physical demolition, destruction, relocation, or alteration of the resource or its immediate surroundings such that the significance of an historical resource would be materially impaired. Title 14 California Code of Regulations Section 15064.5(b)(2) explains that a historical resource is “materially impaired” when a project: Demolishes or materially alters in an adverse manner those physical characteristics that convey its significance and that justify its inclusion in or eligibility for inclusion in the California Register, local register, or its identification in a historic resources survey. As such, the test for determining whether or not a proposed project will have a significant impact on an identified historical resource is whether or not the project will alter in an adverse manner the physical integrity of the historical resource such that it would no longer be eligible for listing in the National or California Registers or other local landmark programs (GPA Consultants, 2019). Discussion Va) Less than Significant with Mitigation. As defined by the CEQA Guidelines (14 CCR 15000 et seq.), a “historical resource” is considered to be a resource that is listed in or eligible for listing in the National Register of Historic Places (NRHP) or California Register of Historical Resources, has been identified as significant in a historical resource survey, or is listed on a local register of historical resources. A historical resource may be listed in the California Register of Historical Resources if it meets any of the following criteria: 1. It is associated with events that have made a significant contribution to the broad patterns of California’s history and cultural heritage. 2. It is associated with the lives of persons important in California’s past. 3. It embodies the distinctive characteristics of a type, period, region, or method of construction, represents the work of an important creative individual, or possesses high artistic value. 4. It has yielded or is likely to yield information important in prehistory or history. For a building to be considered historic, it typically must be at least 50 years old so sufficient time has passed to determine whether the events or characteristics of the building will have a contribution to history. As currently designed, the Project involves the conversion of the Rives Mansion, previously used as a residence, to an office space with expanded accessibility. The expansion of the lobby restroom does not affect the configuration or spatial relationships of the building’s primary spaces. The Project also involves the removal of an original built-in feature located in the informal dining room that contributes to the historic character of Rives Mansion. The addition of a ramp to the north of the building is another step in the proposed Project. As planned, the addition of the ramp does not significantly change the historic character of the property. Twenty-eight (28) parking spaces located north, northeast, and west of the house would be added to the Project site under the current Project design. While most of the proposed parking spaces are in compliance with the Standards, the spots marked 1-6 have the potential to impact the historic views to and from the house. The Project would also include replacement of deteriorated balustrades with new ones that meet code requirements. In many cases, these replacements would require a higher balustrade that would alter the historic character of the building. The City of Downey has determined through a Historical Resources Impacts Analysis that the proposed Project does not comply with the Standards due to the extensive changes to the site (GPA Consulting, 2019). Because 1) City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-22 the new café building, circulation, parking areas, and hardscape located partially in front of the main house, essentially on its front lawn, would contribute to a change in the property’s overall historic character, would change its spatial relationships, and cannot be described as unobtrusive, and 2) the scope of preservation work, deterioration, repair, and replacement have not yet been clearly defined due to the early phase of plan development, the Project as planned would have a potentially significant impact to historical resources pursuant to CEQA Guidelines Section 15064.5. Although the proposed Project would preserve and rehabilitate the original buildings, it would not adversely affect the architectural features that qualify it for listing on the National and California Registers, the proposed Project does not comply with the Secretary of the Interior’s Rehabilitation Standards. While the work proposed on the original buildings complies, the extensive changes to the site do not. However, as explained in the CEQA Impacts Thresholds section above, compliance with the Standards is not required to determine that the impact of a proposed project on a historical resource is less than significant. The test for determining whether or not a proposed project will have a significant impact on an identified historical resource is whether or not the project will alter in an adverse manner the physical integrity of the historical resource such that it would no longer be eligible for listing in the National or California Registers or other local landmark programs. In the case of the Rives Mansion property, it is listed in the National and California Registers for its Georgian Revival architecture. Because the proposed project would preserve and rehabilitate the original buildings, it would not adversely affect the architectural features that qualify it for listing. Although the site would be altered substantially, the buildings, in particular the main house, would continue to possess those features that convey their original design, materials, and craftsmanship. The property would remain eligible for listing as an excellent example of its architectural style. In essence, the appropriate treatment of the original buildings mitigates the changes to the site such that the overall impact of the proposed project on historical resources would be less than significant; however, because the project is still in the early stages of development, mitigation is required to ensure that the original buildings would be treated as presented on the in the proposed Project plans. To reduce the adverse change on the environment as it pertains to historical resources under CEQA to a less than significant level, the applicant will implement the mitigation measures MM-AE-1 and MM-AE-2 (described above under Section I, Aesthetics), MM-CR-1 through MM-CR-6: MM-CR-1 The developer shall retain the services of a qualified consultant architectural historian or historic architect who meets the Secretary of the Interior’s Professional Qualifications Standards to prepare a historical resources treatment plan. This historical resources treatment plan will guide the architect and contractor with the following compliance standards a) which building features and materials of the three original buildings on the property should be preserved (using the character-defining features table in Attachment C of GPA Consulting 2019 report), and b) which features and materials shall be repaired and which are truly beyond repair and will require replacement. MM-CR-2 The qualified consultant architectural historian or historic architect shall review the project plans at the 50% and 100% Construction Documents stages to ensure that they continue to comply with the Secretary of the Interior’s Professional Qualifications Standards. MM-CR-3 The qualified consultant architectural historian or historic architect shall be available to perform construction monitoring for work related to character-defining features throughout construction. MM-CR- 4 If the need for a physical or chemical treatment arises on the three original buildings on the property, the developer shall inform the qualified consultant architectural historian or historic architect prior to administering any treatments or testing. The qualified consultant architectural historian or City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-23 historic architect shall work with the developer, architect, and contractor to determine the gentlest means possible. Test patches shall be prepared in inconspicuous places prior to any wholesale treatments. MM-CR-5 A Qualified Archaeologist, meeting the Secretary of the Interior’s Professional Qualification Standards, shall be present for all initial ground disturbing activities associated with the proposed project. This archaeological monitor shall be responsible for the identification of cultural resources that may be impacted by project activities. The monitor may stop ground-disturbing activities in order to assess any discoveries in the field. Archaeological monitoring may be discontinued when the depth of grading and soil conditions no longer retain the potential to contain cultural deposits. The Qualified Archaeologist shall be responsible for determining the duration and frequency of monitoring. MM-CR-6 In the event that archaeological resources (sites, features, or artifacts) are exposed during construction activities for the proposed project, all construction work occurring within 50 feet of the find shall immediately stop until a Qualified Archaeologist can evaluate the significance of the find and determine whether additional study is warranted. Depending on the significance of the find under the California Environmental Quality Act (CEQA) and the CEQA Guidelines (California Public Resources Code, Section 21082; 14 CCR 15064.5(f)), the Qualified Archaeologist may exhaust the data potential of the find through the process of field level recordation and then allow work to continue. If the discovery proves significant under CEQA, additional work such as preparation of an archaeological treatment plan, testing, or data recovery may be warranted. Vb) Less than significant with mitigation. There are no known archaeological resources on the Project site. As part of a recent CEQA compliance for the nearby the ALDI Food Market project, a cultural resources records search was conducted approximately 1 mile from the proposed Project (Dorrler and Hale 2016). A California Historical Resources Information System records search was performed at the South Central Coastal Information Center (SCCIC) on February 29, 2016, for the ALDI Food Market project and a 1-mile radius around the project site. The search included the SCCIC’s collection of mapped prehistoric, historical, and built-environment resources, Department of Parks and Recreation (DPR) Site Records, technical reports, archival resources, and ethnographic references. Additional consulted sources included the NRHP, California Register of Historical Resources, Office of Historic Preservation Archaeological Determinations of Eligibility, California Points of Historical Interest, California Historical Landmarks, and Caltrans Bridge Survey information. The Project would have less than significant impact on archaeological resources pursuant to CEQA Guidelines Section 15064.5. However, there is potential for archeological resource discovery during planned ground-disturbing activity to construct the new café building, perimeter wall, trellis, parking, and other site features. To reduce this potentially significant impact to a less than significant level, the applicant is required to comply with the provisions set forth in CEQA Guidelines Section 15064.5 regarding archaeological sites, should any archaeological resource be discovered on the site, the applicant shall implement MM-CR 5 through MM-CR-9: MM-CR-5 A Qualified Archaeologist, meeting the Secretary of the Interior’s Professional Qualification Standards, shall be present for all initial ground disturbing activities associated with the proposed project. This archaeological monitor shall be responsible for the identification of cultural resources that may be impacted by project activities. The monitor may stop ground-disturbing activities in order to assess any discoveries in the field. Archaeological monitoring may be discontinued when the depth of grading and soil conditions no longer retain the potential to contain cultural deposits. The Qualified Archaeologist shall be responsible for determining the duration and frequency of monitoring. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-24 MM-CR-6 In the event that archaeological resources (sites, features, or artifacts) are exposed during construction activities for the proposed project, all construction work occurring within 50 feet of the find shall immediately stop until a Qualified Archaeologist, can evaluate the significance of the find and determine whether additional study is warranted. Depending on the significance of the find under the California Environmental Quality Act (CEQA) and the CEQA Guidelines (California Public Resources Code, Section 21082; 14 CCR 15064.5(f)), the Qualified Archaeologist may exhaust the data potential of the find through the process of field level recordation and then allow work to continue. If the discovery proves significant under CEQA, additional work such as preparation of an archaeological treatment plan, testing, or data recovery may be warranted. MM-CR-7 A qualified Native American monitor with Gabrieleño lineal descent shall be present for all initial ground-disturbing activities associated with the foundation for the café. The Native American monitor shall be responsible for the identification of tribal cultural resources that may be impacted by project activities. The Native American monitor may stop ground-disturbing activities in order to assess any discoveries in the field. Tribal monitoring may be discontinued when the depth of grading and soil conditions no longer retain the potential to contain cultural deposits. A Qualified Archaeologist will be retained to evaluate and appropriately treat any potentially significant discoveries. MM-CR-8 In the event that paleontological resources (fossil remains) are exposed during construction activities for the proposed café, all construction work occurring within 50 feet of the find shall immediately stop until a Qualified Paleontologist, as defined by the Society of Vertebrate Paleontology’s 2010 guidelines, can assess the nature and importance of the find. Depending on the significance of the find, the Qualified Paleontologist may record the find and allow work to continue or recommend salvage and recovery of the resource. All recommendations will be made in accordance with the Society of Vertebrate Paleontology’s 2010 guidelines, and shall be subject to review and approval by the City of Downey. Work in the area of the find may only resume upon approval of a Qualified Paleontologist. MM-CR-9 In accordance with Section 7050.5 of the California Health and Safety Code, if human remains are found, the County Coroner shall be immediately notified of the discovery. No further excavation or disturbance of the site or any nearby area reasonably suspected to overlie adjacent remains shall occur until the County Coroner has determined, within two working days of notification of the discovery, the appropriate treatment and disposition of the human remains. If the County Coroner determines that the remains are, or are believed to be, Native American, he or she shall notify the Native American Heritage Commission in Sacramento within 24 hours. In accordance with California Public Resources Code, Section 5097.98, the Native American Heritage Commission must immediately notify those persons it believes to be the most likely descendant of the deceased Native American. The most likely descendant shall complete their inspection within 48 hours of being granted access to the site. The designated Native American representative would then determine, in consultation with the property owner, the disposition of the human remains. Vc) Less than significant with mitigation. The Project is not expected to disturb any human remains, “since all burials in the City have occurred in the Downey Cemetery since the late 1880’s” (City of Downey, 2004). Thus, the Project would not be expected to disturb any human remains, including those interred outside of formal cemeteries. Notwithstanding this, because the Project includes planned ground-disturbing activity to construct the new café building, perimeter wall, trellis, parking, and other site features, there is the potential to disturb human remains. To reduce this potentially significant impact to a less than significant level, the applicant is required to comply with the provisions set forth in CEQA Guidelines Section 15064.5 regarding archaeological sites, should any human remains be discovered on the site, then implement mitigation measure MM-CR-9 described above. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-25 Conclusion Based on the above considerations, the impact of the proposed Project on Cultural Resources is expected to be less than significant with the implementation of mitigation measures MM-CR-1 through MM-CR-9. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-26 VI. Energy. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Result in potentially significant environmental impact due to wasteful, inefficient, or unnecessary consumption of energy resources, during project construction or operation?     b) Conflict with or obstruct a state or local plan for renewable energy or energy efficiency?     Significance Criteria Impacts to energy resources will be considered significant if any of the following criteria are met: - The project results in substantial depletion of existing energy resource supplies. - The project uses non-renewable resources in a wasteful and/or inefficient manner. - The project state or local plan for renewable energy or energy efficiency. Methodology The proposed historic Rives Mansion conversion involves the remodel of an existing historic residential building, carriage house and water tower into office space and the construction of a new 1,200 sf café. The projected natural gas and electricity use were estimated within the California Emissions Generator Model (CalEEMod) model runs developed for the air quality and greenhouse gas technical report (Appendix B). The Project emissions were assessed in two separate model runs: 1) new construction of the café building, and 2) the renovation of the three existing buildings into office buildings. Table 3-8 summarizes the worst-case natural gas and electricity use for the existing residential activity and the proposed Project office conversion and new café (retail use). Table 3-8 - Worst Case Natural Gas and Electricity Use Estimates for Baseline and Proposed Operations Natural Gas Use Electricity Use (kBTU/yr) (kWh/yr) Existing Residential Uses 99,660 28,722 Proposed Offices 78,273 97,672 Proposed 1200 sq. ft. Café 276,912 52,968 Total Proposed Project 355,185 150,640 Estimated Net Change 255,524 121,918 Source: Trinity Consultants, 2019 Under the existing residential use scenario, using CalEEMod, there are 99,660 kBTU natural gas used per year and 28,722 kWh electricity used per year. Under the proposed Conversion Project, there would be 335,185 kBTU per year natural gas and 150,640 kWh per year electricity used. The estimated change in energy use is a net increase in natural gas use of 255,524 kBTU per year and a net increase in electricity use of 121,918 kWh per year. To assess if the proposed Project could contribute to a substantial depletion of existing energy resource City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-27 supplies, this assessment applies a method developed by the SCAQMD for energy consumption, which is one percent of fuel supply. Use of a nearby agency’s threshold is at times appropriate when the Lead Agency concurs and the threshold is legally reasonable; given this project is in the same air basin, this is a new CEQA guidelines impact area and the SCAQMD have been applying this threshold in the region, this is a legally reasonable assessment method. Table 3-9 below summarizes the predicted electricity and natural gas usage of all sectors for Southern California Edison and Southern California Gas, respectively, in the year 2020 (California Energy Commission, 2014). It also includes the electricity and natural gas usage for the proposed Project as determined by CalEEMod runs and calculations of the percentage of all sector demands for 2020 electricity and natural gas usage by the proposed Project. Table 3-9 - Proposed Project and 2020 Projected Annual Electricity and Natural Gas Usage Electricity Usage Natural Gas Usage (kWh/yr) (therms/yr) (kBTU/yr) Total Demand from All Sectors 2020 a 136,079,000,000 7,388,000,000 738,800,000,000 Proposed Project b 150,640 3,552 355,185 Proposed Project Percent of All Sector Demand 2020 0.00011% 0.00005% 0.00005% Significant c NO NO NO a Source: California Energy Commission, 2014 b Source: Trinity Consultants, 2018 c Source: SCAQMD’s energy threshold for natural gas used is 1 percent of fuel supply Discussion IVa) Less Than Significant Impact. The City of Downey’s electricity is provided by Southern California Edison and natural gas is provided by Southern California Gas Company. The California Energy Commission projects that the natural gas consumption for Southern California Gas in 2020 will be 7,388 million (MM) therms for all sectors. The proposed Project increase would be 0.00005% of all sectors. The California Energy Commission projects that the electricity consumption for Southern California Edison in 2020 is 136,079 million kWh for all sectors. The proposed Project increase would be 0.00011% of all sectors. As indicated in Table 3-9, the anticipated increase in natural gas and electricity usage from implementing the proposed Project is substantially less than the SCAQMD’s CEQA significance threshold for energy, which is one percent of estimated area fuel use. Based on these considerations, the proposed Project will have a less than significant environmental impact due to wasteful, inefficient, or unnecessary consumption of energy resources. IVb) Less than Significant Impact. The City of Downey is in the process of updating its energy efficiency programs (California Energy Commission, 2018). This Project will be required to adhere to all City policies and codes regulating consumption of energy resources. Given that the increases in natural gas and electricity would all be less than the SCAQMD’s energy threshold of one percent and the proposed Project would be required to follow the City’s building codes including the latest energy conservation requirements, energy consumption impacts as a result of the Project would therefore be less than significant. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on energy would be expected. Since no potentially significant adverse energy impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-28 VII. Geology and Soils. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Directly or indirectly cause potential substantial adverse effects, including the risk of loss, injury, or death involving: i) Rupture of a known earthquake fault, as delineated on the most recent Alquist-Priolo Earthquake Fault Zoning Map, issued by the State Geologist for the area or based on other substantial evidence of a known fault? Refer to Division of Mines and Geology Special Publication 42.     ii) Strong seismic ground shaking?     iii) Seismic-related ground failure, including liquefaction?     iv) Landslides?     b) Result in substantial soil erosion or the loss of topsoil?     c) Be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the project, and potentially result in on- or off-site landslide, lateral spreading, subsidence, liquefaction or collapse?     d) Be located on expansive soil, as defined in Table 18-1-B of the Uniform Building Code (1994), creating substantial direct or indirect risks to life or property?     e) Have soils incapable of adequately supporting the use of septic tanks or alternative waste water disposal systems where sewers are not available for the disposal of waste water?     f) Directly or indirectly destroy a unique paleontological resource or site or unique geologic feature?     Significance Criteria Impacts on the geological environment will be considered significant if any of the following criteria apply: - Topographic alterations would result in significant changes, disruptions, displacement, excavation, compaction or over covering of large amounts of soil. - Unique geological resources (paleontological resources or unique outcrops) are present that could be disturbed by the construction of the proposed project. - Exposure of people or structures to major geologic hazards such as earthquake surface rupture, ground shaking, liquefaction or landslides. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-29 - Secondary seismic effects could occur which could damage facility structures, e.g., liquefaction. - Other geological hazards exist which could adversely affect the facility, e.g., landslides, mudslides. Discussion VIIa.i-iii and VIIc) Less than significant impact. The City of Downey is not located within an Alquist-Priolo Earthquake Fault Zone, as indicated on the California Earthquake Hazards Zone Application ("EQ Zapp") online map provided by the California Department of Conservation (CDOC), nor is it expected to involve strong seismic ground shaking or seismic-related ground failure (CDOC, 2019). Construction on the proposed Project site would not involve significant changes in topography. Nonetheless, the City of Downey is located in an area considered to be seismically active, as is most of Southern California. Major active fault zones are located southwest and northeast of the City, with the Whittier Fault having the greatest potential to impact the Project site. It is located approximately 5 to 6 miles northeast of the Project site and is capable of a maximum moment magnitude of 7.2 (Southern California Earthquake Data Center, 2019). Since the site is not located within the boundaries of an Earthquake Fault Zone and no faults are known to pass through the property, surface fault rupture within the site is considered unlikely. Impacts are considered to be less than significant since all new construction is already required to comply with the existing seismic standards of the Building Code, which already mitigates any potential significant impact. Liquefaction is a phenomenon where earthquake-induced ground vibrations increase the pore pressure in saturated, granular soils until it is equal to the confining, overburden pressure. When this occurs, the soil can completely lose its shear strength and enter a liquefied state. The possibility of liquefaction is dependent upon grain size, relative density, confining pressure, saturation of the soils, strength of the ground motion and duration of ground shaking. In order for liquefaction to occur, three criteria must be met: underlying loose, coarse-grained (sandy) soils; a groundwater depth of less than about 50 feet; and a nearby large magnitude earthquake. The susceptibility of soil to liquefy tends to decrease as the density of the soil increases and the intensity of ground shaking decreases. Strong ground shaking will also tend to densify loose to medium dense deposits of partially saturated granular soils and could result in seismic settlement of foundations and the ground surface at the project site. The Building Code requires that the applicant prepare a soils report for all new structures on the site. The soils reports will set design standards to address any potential negative impact from liquefaction. For these reasons, the potential seismic-related impact is considered to be less than significant. VIIa.iv) No impact. Topographically, the property is essentially planar, staying at a consistent elevation throughout the property according to Google Earth. Elevations in the area are approximately 107 feet above sea level. Overall, the City of Downey has a relatively flat topography and the possibility of landslides is typically unlikely. The proposed Project site is not with in a potential earthquake-induced landslide hazard zone, and due to the low gradient of the site, seismically induced landsliding is not likely. Implementation of the proposed Project would not result in the exposure of people or structures to the risk of landslides during a seismic event. For these reasons, the proposed Project would have no impact. VIIb): No impact. The project would not result in substantial soil erosion or the loss of topsoil. The potential for soil erosion is low due to the existing planar topography of the proposed Project site. The current landscaping dirt is not maintained. The new landscaping would be primarily grass and shrubbery. Furthermore, the disturbed area for construction as a result of the construction of a new 1,200 sf café building at the eastern edge of the property is considered to be insubstantial. The proposed Project area currently contains minimal amounts of topsoil. For these reasons, the proposed Project would have no impact. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-30 VIId) No impact. Expansive soils are typically composed of certain types of silts and clays that have the capacity to shrink or swell in response to changes in soil moisture content. Shrinking or swelling of foundation soils can lead to damage to foundations and engineered structures including tilting and cracking. The proposed Project would comply with current DMC and California Building Code requirements and would not affect foundations or result in other structural or engineering modifications that could increase exposure of people or structures to risk associated with expansive soils. For these reasons, the proposed Project would have no impact. VIIe) No impact. The City of Downey is an urban area that is served by a sanitary sewer system. New septic tanks are prohibited within the City. For this reason, the proposed Project would have no impact. VIIf) No impact. The proposed Project site location does not contain a unique paleontological resource or site or a unique geologic feature. For this reason, the proposed Project would have no impact on such a resource, site, or feature. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on geology and soils resources would be expected. Since no potentially significant adverse geology and soils resources impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-31 VIII. Greenhouse Gas Emissions. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Generate greenhouse gas emissions, either directly or indirectly, that may have a significant impact on the environment?     b) Conflict with an applicable plan, policy or regulation adopted for the purpose of reducing the emissions of greenhouse gases?     Significance Criteria Impacts to greenhouse gas emissions will be considered significant if any of the following criteria are met: - The project results in greenhouse emissions in excess of 10,000 metric tons per year for stationary sources and 3,000 metric tons per year for commercial or retail sources. - The project conflicts with an applicable plan, policy or regulation adopted for the purpose of reducing the emissions of greenhouse gases. Discussion Global climate change refers to change in average meteorological conditions on the earth with respect to temperature, precipitation, and storms, lasting for decades or longer. Greenhouse gases (GHGs) are present in the atmosphere naturally, released by natural sources, or formed from secondary reactions taking place in the atmosphere. They include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O) and ozone (O3). In the last 200 years, substantial quantities of GHGs have been released into the atmosphere, primarily from fossil fuel combustion. These human-induced emissions are increasing GHG concentrations in the atmosphere, therefore enhancing the natural greenhouse effect. The GHGs resulting from human activity are believed to be causing global climate change. While human-made GHGs include CO2, CH4, and N2O, some (like chlorofluorocarbons [CFCs]) are completely new to the atmosphere. GHGs vary considerably in terms of Global Warming Potential (GWP), the comparative ability of each GHG to trap heat in the atmosphere. The GWP is based on several factors, including the relative effectiveness of a gas to absorb infrared radiation and the length of time that the gas remains in the atmosphere (“atmospheric lifetime”). The GWP of each gas is measured relative to CO2, the most abundant GHG. The definition of GWP for a particular GHG is the ratio of heat trapped by one unit mass of the GHG to the ratio of heat trapped by one unit mass of CO2 over a specified time period. GHG emissions are typically measured in terms of pounds or tons of “CO2 equivalents” (CO2e). Worldwide emissions of GHGs in 2008 were 30.1 billion metric tons of CO2e and have increased considerably since that time (United Nations, 2011). It is important to note that the global emissions inventory data are not all from the same year and may vary depending on the source of the data (U.S. EPA, 2016). Emissions from the top five emitting countries and the European Union accounted for approximately 55% of total global GHG emissions. The United States was the number two producer of GHG emissions. The primary GHG emitted by human activities in the United States was CO2, representing approximately 84% of total GHG emissions (U.S. EPA, 2016). On September 27, 2006, Assembly Bill 32 (AB32), the California Global Warming Solutions Act of 2006 (the Act) was enacted by the State of California. The legislature stated, “Global warming poses a serious threat to the economic well-being, public health, natural resources, and the environment of California.” The Act caps City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-32 California’s GHG emissions at 1990 levels by 2020. The Act defines GHG emissions as all of the following gases: CO2, CH4, N2O , hydrofluorocarbons, perfluorocarbons and sulfur hexafluoride. This agreement represents the first enforceable statewide program in the U.S. to cap all GHG emissions from major industries that includes penalties for non-compliance. While acknowledging that national and international actions will be necessary to fully address the issue of global warming, AB32 lays out a program to inventory and reduce GHG emissions in California and from power generation facilities located outside the state that serve California residents and businesses. AB32 charges California Air Resources Board (CARB) with responsibility to monitor and regulate sources of GHG emissions in order to reduce those emissions. CARB has adopted a list of discrete early action measures that can be implemented to reduce GHG emissions. CARB has defined the 1990 baseline emissions for California and has adopted that baseline as the 2020 statewide emissions cap. CARB is conducting rulemaking for reducing GHG emissions to achieve the emissions cap by 2020. In designing emission reduction measures, CARB must aim to minimize costs, maximize benefits, improve and modernize California’s energy infrastructure, maintain electric system reliability, maximize additional environmental and economic co-benefits for California, and complement the state’s efforts to improve air quality. VIIIa) Less than significant impact. The SCAQMD Governing Board adopted an interim GHG significance threshold for projects where the SCAQMD is the lead agency in December of 2008. This interim established a threshold for 10,000 metric tons (MT) CO2e per year for industrial projects. SCAQMD has also proposed a screening-level threshold of 3,000 MT CO2e per year for commercial and residential projects. The expected GHG emissions from construction are listed in Table 3-3, Maximum Construction Emissions. The maximum GHG emissions from operation are listed in Table 3-4, Maximum Unmitigated Operational Emissions. According to the results in Tables 3-3 and 3-4, the maximum construction and operational GHG emissions are well below the proposed SCAQMD threshold of 3,000 MT per year for commercial projects. For these reasons, the proposed Project would have a less than significant GHG emission impact on the environment. No mitigation measures would be required. VIIIb) Less than significant impact. As discussed in response to checklist question VIIIa above, GHG emissions that would occur from the construction and operation of the proposed Project would be less than significant. The City does not have local policies or ordinances with the purpose of reducing greenhouse gas emissions. However, the City is subject to compliance with the Global Warming Solutions Act of 2006 (Chapter 488, Statutes of 2006). This Project would generate a very small amount of new GHGs and would be well below the SCAQMD thresholds for a commercial project. Further, the proposed Project would reduce regional vehicle miles travelled (VMT) over the existing residential use (described further in Checklist Section XVIII, Transportation). For these reasons, the proposed Project would not conflict with any plan, policy, or regulation adopted with the goal of reducing GHG emissions. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on GHG emissions would be expected. Since no potentially significant adverse GHG emissions impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-33 IX. Hazards and Hazardous Materials. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Create a significant hazard to the public or the environment through the routine transport, use, or disposal of hazardous materials?     b) Create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment?     c) Emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste within one-quarter mile of an existing or proposed school?     d) Be located on a site which is included on a list of hazardous materials sites compiled pursuant to Government Code Section 65962.5 and, as a result, would it create a significant hazard to the public or the environment?     e) For a project located within an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project result in a safety hazard or excessive noise for people residing or working in the project area?     f) Impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan?     g) Expose people or structures, either directly or indirectly, to a significant risk of loss, injury or death involving wildland fires?     Significance Criteria Impacts associated with hazards will be considered significant if any of the following occur: - Non-compliance with any applicable design code or regulation. - Non-conformance to National Fire Protection Association standards. - Non-conformance to regulations or generally accepted industry practices related to operating policy and procedures concerning the design, construction, security, leak detection, spill containment or fire protection. - Exposure to hazardous chemicals in concentrations equal to or greater than the Emergency Response Planning Guideline (ERPG) 2 levels. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-34 Discussion IXa through IXc) No impact. The request involves conversion of the Historic Rives Mansion and associated structures into office space and the construction of a new 1,200 sf retail café building. This conversion of residential property into office space uses and the development of a retail café building would not involve the use, handling, or storage of any potentially hazardous materials, nor would it involve excavation that could potentially disturb contaminated soils or groundwater. As such, the proposed Project would not create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment. Children’s Academy of Success is located a quarter-mile to the east of the proposed Project site. However, the proposed Project would not foreseeably emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste and would therefore not do so within one-quarter mile of an existing or proposed school. IXd) No impact. Based on a records search in the EnviroStor and GeoTracker databases, the proposed Project is not located on a site which is included on a list of hazardous materials sites compiled pursuant to Government Code Section 65962.5.12 (EnviroStor, 2019 and GeoTracker, 2019). For this reason, the proposed Project would have no impact. IXe) No impact. The City of Downey is not located within an airport land use plan or within two miles of a public airport or public use airport. The nearest airport is the Compton/Woodley Airport, which is approximately 6.8 miles southwest of the proposed Project site. Therefore, the project would not result in a safety hazard for people residing or working in the Project area. For this reason, the proposed Project would have no impact. IXf) No Impact. The site is not a defined staging/evacuation area on any adopted emergency response plan or emergency evacuation plan. Furthermore, construction of the project would not impede street access, thus it would not create a hazard to emergency response in the area. For this reason, the proposed Project would have no impact. IXg) No impact. The proposed Project site is located in an urbanized area of the City and is not contiguous to a designated high fire area associated with any designated wildland area according to California Public Utility Commission (CPUC) online FireMap (CPUC, 2019). Therefore, implementation of the proposed Project would not result in the exposure of people or structures to hazards associated with wildland fires. For this reason, the proposed Project would have no impact. Conclusion Based on these considerations, there would be no significant adverse impacts from the proposed Project on hazards and hazardous materials. Since no potentially significant adverse hazards and hazardous materials impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-35 X. Hydrology and Water Quality. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Violate any water quality standards or waste discharge requirements or otherwise substantially degrade surface or ground water quality?     b) Substantially decrease groundwater supplies or interfere substantially with groundwater recharge such that the project may impede sustainable groundwater management of the basin?     c) Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river or through the addition of impervious surfaces, in a manner which would:  i) result in a substantial erosion or siltation on- or off-site;     ii) substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- or offsite;     iii) create or contribute runoff water which would exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of polluted runoff; or     iv) impede or redirect flood flows?     d) In flood hazard, tsunami, or seiche zones, risk release of pollutants due to project inundation?     e) Conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management plan?     Significance Criteria Potential impacts on water resources will be considered significant if any of the following criteria apply: Water Demand: - The City of Downey’s Vision 2025 states that the City’s goal is to promote the conservation of water resources, however has no numerical thresholds. Water Quality: - The project will cause degradation or depletion of ground water resources substantially affecting current or future uses. - The project will cause the degradation of surface water substantially affecting current or future uses. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-36 - The project will result in a violation of National Pollutant Discharge Elimination System (NPDES) permit requirements. - The capacities of existing or proposed wastewater treatment facilities and the sanitary sewer system are not sufficient to meet the needs of the project. - The project results in substantial increases in the area of impervious surfaces, such that interference with groundwater recharge efforts occurs. - The project results in alterations to the course or flow of floodwaters. Discussion The proposed Project would increase the amount of impervious surface area with the additional of a new café building, a driveway, and parking. The proposed Project location has previously been used as a residence and consumed approximately 743,606 gallons of water per year, or 2,037 gallons of water per day, based on modeling using CalEEMod (Appendix B). As office building space, the proposed Project would use approximately 2,155,738 gallons of water per year, or 5,906 gallons of water per day. The newly constructed café building would use approximately 387,490 gallons per year, or 1,062 gallons per day. Table 3-10 summarizes the CalEEMod water usage estimates and represents a very conservative estimate of water usage at the Project site. The City of Downey has confirmed that they will be able to meet the increase demand for water. Table 3-10 - Current and Proposed Water Usage Description Gallons per Year Gallons per Day Current Residential Water Usage 743, 606 2,037 Proposed Office Space Water Usage 2,155,738 5,906 Proposed Café Building Water Usage 387.490 1,062 Total Proposed Water Usage 2,543,228 6,968 Change in Water Usage per Year + 1,799,623 +4,930 Xa.i through Xa.iv, Xb, Xc, and Xe) Less than significant impact. The agency with jurisdiction over water quality within the Project area is the Los Angeles Regional Water Quality Control Board (LARWQCB). The Clean Water Act (CWA) prohibits the discharge of pollutants to waters of the United States from any point source unless the discharge is in compliance with a NPDES permit. In accordance with the CWA, construction is required to comply with the NPDES, and as such, would not cause any violations associated with water quality City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-37 standards or water discharge requirements. For these reasons, the potential water quality impact is considered to be less than significant Xd) No Impact. The City of Downey is relatively flat and is not located near a dam, lake, or ocean, and therefore, inundation by seiche, tsunami, or mudflow is not anticipated. Moreover, tsunamis and seiches do not pose hazards due to the inland location of the site and lack of nearby bodies of standing water. For these reasons, the proposed Project would have no impact. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on hydrology and water quality resources would be expected. Since no potentially significant adverse hydrology and water quality resources impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-38 XI. Land Use and Planning. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Physically divide an established community?     b) Cause a significant environmental impact due to a conflict with any land use plan, policy, or regulation adopted for the purpose of avoiding or mitigating an environmental effect?     Significance Criteria Land use and planning impacts will be considered significant if the project conflicts with the land use and zoning designations established by local jurisdictions. Discussion XIa) No impact. The potential conversion of this request would not divide an established community. The Historic Rives Mansion is located within the Downtown Downey Specific Plan in a busy commercial area. To the west and south of the property, there is a residential neighborhood of one-story single-family residences. Most of the surrounding buildings to the east are restaurants and commercial businesses. The proposed Project is in the middle of this mixed use area. The proposed Project includes a change in use of the historic Rives Mansion from residential to office and the addition of a café. Because these are allowed uses in Downtown Downey Specific Plan, the proposed Project would not include any major change on site. For these reasons, there would be no land use impact to the established community. XIb) No impact. The Project is located within the Downtown Downey Specific Plan. The proposed office and café land uses are allowed within this land use designation and would therefore not conflict with any applicable land use plan, policy, or regulation of an agency with jurisdiction over the Project adopted for the purpose of avoiding or mitigating an environmental effect. The proposed Project complies with the Land Use and Economic Development Elements of the City’s 2025 General Plan. For these reasons, there would be no land use conflicts. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on land use and planning would be expected. Since no potentially significant adverse land use and planning impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-39 XII. Mineral Resources. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Result in the loss of availability of a known mineral resource that would be a value to the region and the residents of the state?     b) Result in the loss of availability of a locally important mineral resource recovery site delineated on a local general plan, specific plan or other land use plan?     Significance Criteria Project-related impacts on mineral resources will be considered significant if any of the following conditions are met: - The project would result in the loss of availability of a known mineral resource that would be of value to the region and the residents of the state. - The project results in the loss of availability of a locally-important mineral resource recovery site delineated on a local general plan, specific plan or other land use plan. Discussion XIa and XIb) No impact. There are no known mineral resources on the site. Therefore, the proposed project would not affect access to or the availability of valued mineral resources. The proposed Project would not result in the loss of availability of a known mineral resource that would be of value to the region and the residents of the state or of a locally important mineral resource recovery site delineated on a local general plan, specific plan, or other land use plans. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on mineral resources would be expected. Since no potentially significant adverse mineral resource impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-40 XIII. Noise. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies?     b) Generation of excessive groundborne vibration or groundborne noise levels?     c) For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels?     This section is based on an acoustical analysis prepared for the proposed Project by WJV Acoustics and is available in Appendix C (WJVA, 2019). Significance Criteria The CEQA Guidelines indicate that significant noise impacts occur when a project exposes people to noise levels in excess of standards established in local noise ordinances or general plan noise elements or causes a substantial permanent or temporary increase in noise levels above levels existing without the project. Discussion XIIIa) Less than significant impact with mitigation measures. Daily trip generation volumes for the project were estimated in the CalEEMod model as part of the Checklist Section III, Air Quality and Checklist Section VIII, GHG (with additional technical documentation in Appendix B). The CalEEMod estimates show that there would be approximately 204 daily trips, representing an increase of approximately 165 daily trips over the existing daily trips of 39 associated with the existing residential land use (see also Checklist Section XVII, Transportation, for additional Project trip generation details). When added to existing traffic volumes along Paramount Boulevard, Project-related increases in traffic would not result in any measurable increase in traffic-related noise in the Project area. Sources of operational noise from the proposed Project (office land uses) would typically be limited to parking lot vehicle movements, human activity and Mechanical/HVAC systems. Additionally, the proposed café to be located adjacent to Paramount Boulevard would include the use of exhaust fans. The proposed Project acoustical analysis assessed all these noise sources and includes the following findings: Noise level standards at any nearby noise-sensitive land uses would not be exceeded, nor would it exceed existing ambient noise levels in the project area; City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-41 Noise levels associated with HVAC equipment would not be expected to exceed the City’s exterior noise level standard at any nearby noise-sensitive land uses, nor would it exceed existing ambient noise levels in the project area; and Based on existing noise measurements collected on March 19, 2019, the 24-hour average noise level was established at 66.5 db CNEL and maximum noise events are ranging from 70 to 88 dBA from passing events (trucks and aircraft) near the site. Modeling of the additional noise levels associated with Project-related vehicle movements would not contribute to increasing overall noise exposure in terms of the CNEL metric nor exceeding noise thresholds, at nearby noise-sensitive land uses (WJVA, 2019). Although noise levels are predicted to not exceed noise thresholds for a commercial use, the proposed Project is a change of use from residential to commercial and is immediately adjacent to a residential community with windows that face the proposed Project. The change in activity types would change the noise levels from the proposed Project site at these residences. Although the change in the noise environmental might not exceed noise thresholds, it would create a potential nuisance for the existing sensitive land uses. For these reasons, operational on-site noise levels could create a potentially significant operational noise impact. To reduce this potentially significant operational noise impact on adjacent residences, the applicant shall implement MM- NOISE-1 and MM-NOISE-2. MM-NOISE-1 The applicant shall build a 6-foot high masonry wall above finished grade on the northwest side of the project site. MM-NOISE-2 The applicant shall post signage in the project delivery areas requiring that delivery trucks limit idling to 5 minutes or less; requesting back up alarms be turned off, if possible; and requesting drivers by courteous to neighbors. Construction noise would occur at various locations within the Project site throughout the renovation, minor demolition and café build-out period. Construction noise is not usually considered to be a significant impact if construction is limited to the daytime hours and construction equipment is adequately maintained and muffled. Extraordinary noise-producing activities (e.g., pile driving) are not anticipated as part of the proposed Project. Additionally, construction activities should be restricted as described in Section 4606.5 (Construction Projects) of the DMC. Although the change in the noise environment might not exceed construction-related noise thresholds, it would create a potential nuisance for the existing sensitive land uses during the construction period. For these reasons, construction-related noise levels could create a potentially significant short-term noise impact. To reduce this potentially significant construction noise impact on adjacent residences, the applicant shall implement MM-NOISE-3. MM-NOISE-3 In order to reduce impacts related to heavy construction equipment moving and operating on site during project construction, grading, demolition, and paving prior to issuance of grading permits, the applicant shall ensure that the following procedures are followed: • All construction equipment, fixed or mobile, shall be equipped with properly operating and maintained mufflers. • Construction noise reduction methods, such as shutting off idling equipment, maximizing the distance between construction equipment staging areas and occupied sensitive receptor areas, and using electric air compressors and similar power tools rather than diesel equipment, shall be used where feasible. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-42 • During construction, stationary construction equipment shall be placed so noise is directed away from or shielded from sensitive noise receptors where feasible. • During construction, stockpiling and vehicle staging areas shall be located as far as practicable from noise-sensitive receptors. • Construction shall be restricted to weekdays between the hours of 7:00 a.m. and 7:00 p.m. and Saturdays between the hours of 8:00 a.m. and 5:00 p.m. No construction shall occur on Sunday. Construction hours, allowable workdays, and the phone number of the job superintendent shall be clearly posted at all construction entrances to allow surrounding property owners and residents to contact the job superintendent. In the event the City of Downey receives a complaint, appropriate corrective actions shall be implemented, and a report of the action shall be provided to the reporting party. With inclusion of MM-NOISE-1 through MM-NOISE-3, this potential impact would be reduced to a less than significant level. No additional mitigation measures would be required. XIIIb) Less than significant impact with mitigation measures. After full Project build out, it is expected that ongoing operational activities will result in some vibration impacts at nearby sensitive uses during garbage collection if such activities occurred between 8:00 p.m. and 8:00 a.m. Activities involved in trash bin collection could result in minor on-site vibrations as the bin is placed back onto the ground. Such vibrations would not be expected to be felt at the closest off-site sensitive uses during daytime hours. Although vibration levels are predicted to not exceed noise thresholds for a commercial use, the proposed Project is a change of use from residential to commercial and is immediately adjacent to a residential community with windows that face the proposed Project. The change in activity types would change the vibration levels from the proposed Project site at these residences. Although the change in the vibrational noise might not exceed noise thresholds, it could create a potential nuisance for the existing sensitive land uses. For these reasons, the change in operational on-site vibration levels would create a potentially significant operational vibration impact. To reduce this potentially significant operational vibration impact on adjacent residences, the applicant shall implement MM-NOISE-4. MM-NOISE 4 The applicant will post a sign that prohibits trash pick-up between 8:00 p.m. and 8:00 a.m. With inclusion of MM-NOISE-4, this potential impact would be reduced to a less than significant level. No additional mitigation measures would be required. XIIIc) No impact. The Project is not located within the vicinity of a private airstrip or an airport land use plan or within two miles of a public airport or public use airport. Therefore, the proposed Project would not expose workers or clientele to any excessive airport-related noise. Conclusion Based on these considerations, no significant adverse noise impacts from the proposed Project would be expected. Since no potentially significant adverse noise impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-43 XIV. Population and Housing. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Induce substantial unplanned population growth in an area, either directly (for example, by proposing new homes and businesses) or indirectly (for example, through extension of roads or other infrastructure)?     b) Displace substantial numbers of existing people or housing, necessitating the construction of replacement housing elsewhere?     Significance Criteria Impacts of the proposed project on population and housing will be considered significant if the following criteria are exceeded: - The demand for temporary or permanent housing exceeds the existing supply. - The proposed project produces additional population, housing or employment inconsistent with adopted plans either in terms of overall amount or location. Discussion XIVa) Less than Significant Impact. The proposed Project involves the conversion of an existing historic residential building, carriage house and water tower into office uses. The proposed Project also includes the construction of a new café. Neither the conversion to office use nor the new café are expected to induce any unplanned population growth. Further, the Project is within the Downtown Downey Specific Plan, and is expected to accommodate the commercial growth anticipated by the 2025 General Plan (City of Downey, 2004). XIVb) Less than Significant impact. The proposed Project is the conversion of the Historic Rives Mansion from residential to office uses. There will be a displacement of less than a dozen residential units (the actual number of apartments was between six and eight). This residence has previously been relocated. Given the small number of residential units displaced, this is not a substantial displacement. Further, the building is within the Downtown Downey Specific Plan (which is a mixed use and commercial activity zone), and this conversion to office uses is consistent with this zone. For these reasons, the displacement of the residential unit would be found to be less than significant. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on population and housing would be expected. Since no potentially significant population and housing impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-44 XV. Public Services. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, need for new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times, or other performance objectives for any of the public services: i. Fire protection?     ii. Police protection?     iii. Schools?     iv. Parks?     v. Other public facilities?     Significance Criteria Impacts on public services will be considered significant if a project results in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, or the need for new or physically altered government facilities, the ground disturbing activities which could cause significant environmental impacts, in order to maintain acceptable service ratios, response time or other performance objectives. Discussion XVa.i-v) Less than Significant Impact. The City of Downey is an urban full service community, providing its own police service, fire protection, library system, and park and recreation services. The Downey Unified School District provides all public education in the area. Because the site is already developed and the proposed Project is largely the conversion of use from residential to office with the addition of a 1,200 sf café, there would be only a minimal impact on public services. The proposed Project would not induce growth and would create only a small number of new jobs in the area. For these reasons, it is anticipated that the proposed Project would require no additional public services with the approval of the proposed Project. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on public services would be expected. Since no potentially significant public service impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-45 XVI. Recreation. Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Would the project increase the use of existing neighborhood and regional parks or other recreational facilities such that substantial physical deterioration of the facility would occur or be accelerated?     b) Does the project include recreational facilities or require the construction or expansion of recreational facilities which might have an adverse physical effect on the environment?     Significance Criteria Impacts to recreation will be considered significant if: - The project results in an increased demand for neighborhood or regional parks or other recreational facilities. - The project adversely affects existing recreational opportunities. Discussion XVIa and XVIb) No impact. The proposed Project is the conversion of the historic Rives Mansion from residential to office uses plus the addition of a 1,200 sf café. The proposed Project activity levels would affect the demand for or use of existing neighborhood and regional parks or other recreational facilities by a nominal amount. The proposed Project would not require the construction or expansion of existing recreational facilities that might have adverse physical effects on the environment. For these reasons, the proposed Project would have no impact on recreational resources. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on recreation would be expected. Since no potentially significant adverse recreation impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-46 XVII. Transportation. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Conflict with a program, plan, ordinance or policy addressing the circulation system, including transit, roadway, bicycle and pedestrian facilities?     b) Conflict or be inconsistent with CEQA Guidelines Section 15064.3, subdivision (b)?     c) Substantially increase hazards due to a geometric design feature (e.g., sharp curves or dangerous intersections) or incompatible uses (e.g., farm equipment)?     d) Result in inadequate emergency access?     Methodology The proposed historic Rives Mansion conversion involves the conversion of an existing historic residential building, carriage house and water tower into office uses and the construction of a new 1,200 sf café. The daily traffic generation estimates and annual VMT were estimated within model runs of CalEEMod developed for the air quality and greenhouse gas technical report (Appendix B). Table 3-11 summarizes the worst-case daily trip generation for the existing residential activity and the proposed office conversion and new café (retail use). Table 3-11 - Worst Case Trip Generation Estimates for Baseline and Proposed Operations Maximum Daily Truck Trips Maximum Daily Passenger Trips Total Daily Trips Peak Hour Tripsa VMT Existing Residential 3 36 39 4 156,144 Proposed Offices 6 66 72 7 69,539 Proposed 1200 sf Caféb 11 121 132 13 74,201 Estimated Change 14 151 165 16 -12,404 Source: Trinity Consultants, 2019 Notes: a) The peak hour trips were estimated by multiplying the daily trips by 10%, a reasonably conservative daily to peak hour ratio typically applied for planning level estimates. b) The estimated trips are for a typical restaurant in a stand-alone retail setting. The proposed café is located close to central Downey and is, by design, located where it is expecting more walking and pass-by trips than the new trips presented in Table 3-11. For these reasons, the estimated daily trip generation is considered “worst-case” and the café trips would likely be 50% of what is presented. Under the existing residential use, there have been 39 daily and 4 peak-hour baseline trips. Under the proposed Conversion Project, there would be 2004 daily and 20 peak hour worst-case trips. Given the location and higher walking and pass-by trips appropriate for this use and location, it is more likely that there would be 50% of what is presented in CalEEMod or 138 daily trips and 14 peak hour trips. This would lead to an increase in daily traffic levels by 165 trips under worst-case scenario or 99 daily trips under a reasonably conservative scenario. The City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-47 site access would be similar to existing operations with a driveway on Paramount Boulevard and another at the rear of the property on 3rd Street. Discussion XVIIa) Less Than Significant Impact. The property is an existing historic mansion with ancillary buildings that were constructed in 1911. Any vehicle approaching the site would use the existing driveways from Paramount Boulevard and 3rd Street. Although there may be a slight rebuilding of the driveway at Paramount Boulevard as part of the site conversion, the proposed Project would not require any major modifications in site access. The proposed level of trip generation would lead to an increase in daily traffic levels by 165 trips under worst-case scenario or 99 daily trips under a reasonably conservative scenario, or an increase ranging from 10 to 17 in peak hour trips (refer to Table 3-11). Based on thresholds published the SCAQMD of 350 trips per day, this level of traffic generation would have a less than significant effect on traffic operations and therefore a less than significant impact on any applicable plan, ordinance, or policy establishing measures of effectiveness for the performance of the circulation system, taking into account all modes of transportation. Thus, there would be less than significant impacts to the circulation systems in relation to mass transit that conflict with any adopted policies, plans, or programs supporting alternative transportation. Therefore, there would be less than significant impacts caused by the proposed Project on applicable plans and policies for all modes of transportation. XVIIb) Less than Significant Impact. Table 3-11 shows that the proposed Project would conservatively generate 12,404 less VMT than existing residential uses. Given that travel studies have shown longer trip lengths associated with residential activities for most trip purposes, this is a reasonably conservative estimate. This reduction in VMT is consistent with CEQA Guidelines § 15064.3, subdivision (b) and would thus have a less than significant impact on local congestion management policies. XVIIc) No Impact. The proposed Project does not include any new major design features; the front driveway includes redesigning the project driveway to allow the City of Downey to bring the cross walk and curb ramp into compliance with ADA standards (see Project Description for additional details); but no major redesign of the intersection. Additionally, the proposed Project would not include any incompatible uses (e.g., farm equipment). For these reasons, there would no substantial increase in hazards due to a geometric design feature (e.g., sharp curves or dangerous intersections) or incompatible uses, thus the proposed Project would have no hazards impact. XVIId) Less than Significant Impact. The proposed Conversion Project does not include any new major design features; the front driveway includes an updated curb cut but no major redesign of the intersection. For this reason, the proposed Project would not result in any adverse impacts to on-site emergency access and would have a less than significant impact. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on transportation would be expected. Since no potentially significant adverse transportation impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-48 XVIII. Tribal Cultural Resources. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Would the project cause a substantial adverse change in the significance of a tribal cultural resource, defined in Public Resources Code § 21074 as either a site, feature, place, cultural landscape that is geographically defined in terms of the size and scope of the landscape, sacred place, or object with cultural value to a California Native American tribe, and that is: i) Listed or eligible for listing in the California Register of Historical Resources, or in a local register of historical resources as defined in Public Resources Code section 5020.1(k), or     ii) A resource determined by the lead agency, in its discretion and supported by substantial evidence, to be significant pursuant to criteria set forth in subdivision (c) of Public Resources Code § 5024.1. In applying the criteria set forth in subdivision (c) of Public Resource Code § 5024.1, the lead agency shall consider the significance of the resource to a California Native American tribe.     Significance Criteria Impacts on tribal resources will be considered significant if the project causes a substantial adverse change in the significance of a tribal cultural resource. Discussion XVIIIai) and XVIIaii) Less than Significant with Mitigation. In accordance with AB 52 and SB 18, which requires consultation with Native American tribes for all CEQA projects, a notification of consultation opportunity was sent to five tribal contacts provided by the Native American Heritage Commission. To date, one consultation request has been received. Tribal consultation was conducted on June 13, 2019 via teleconference with Andrew Salas and Mathew Tuetimez of the Gabrieleno Band of Mission Indians – Kizh Nation. It was determined that there is the potential for tribal cultural resources to be present at the proposed Project site. This could create a potentially significant impact. To reduce this potentially significant impact to a less than City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-49 significant level, the application is required to comply with the provisions set forth in CEQA guidelines Section 15064.5 regarding archaeological sites, should any archaeological resource be discovered on the site, the applicant shall implement MM-CR-5 through MM-CR-9. After reviewing the language of the cultural resources mitigation measures MM-CR-5 through MM-CR-9, the tribal representatives accepted the language and concluded the consultation. MM-CR-5 A Qualified Archaeologist, meeting the Secretary of the Interior’s Professional Qualification Standards, shall be present for all initial ground disturbing activities associated with the proposed project. This archaeological monitor shall be responsible for the identification of cultural resources that may be impacted by project activities. The monitor may stop ground-disturbing activities in order to assess any discoveries in the field. Archaeological monitoring may be discontinued when the depth of grading and soil conditions no longer retain the potential to contain cultural deposits. The Qualified Archaeologist shall be responsible for determining the duration and frequency of monitoring. MM-CR-6 In the event that archaeological resources (sites, features, or artifacts) are exposed during construction activities for the proposed project, all construction work occurring within 50 feet of the find shall immediately stop until a Qualified Archaeologist can evaluate the significance of the find and determine whether additional study is warranted. Depending on the significance of the find under the California Environmental Quality Act (CEQA) and the CEQA Guidelines (California Public Resources Code, Section 21082; 14 CCR 15064.5(f)), the Qualified Archaeologist may exhaust the data potential of the find through the process of field level recordation and then allow work to continue. If the discovery proves significant under CEQA, additional work such as preparation of an archaeological treatment plan, testing, or data recovery may be warranted. MM-CR-7 A qualified Native American monitor with Gabrieleño lineal descent shall be present for all initial ground-disturbing activities associated with foundation for the café. The Native American monitor shall be responsible for the identification of tribal cultural resources that may be impacted by project activities. The Native American monitor may stop ground-disturbing activities in order to assess any discoveries in the field. Tribal monitoring may be discontinued when the depth of grading and soil conditions no longer retain the potential to contain cultural deposits. A Qualified Archaeologist will be retained to evaluate and appropriately treat any potentially significant discoveries. MM-CR-8 In the event that paleontological resources (fossil remains) are exposed during construction activities for the proposed café, all construction work occurring within 50 feet of the find shall immediately stop until a Qualified Paleontologist, as defined by the Society of Vertebrate Paleontology’s 2010 guidelines, can assess the nature and importance of the find. Depending on the significance of the find, the Qualified Paleontologist may record the find and allow work to continue or recommend salvage and recovery of the resource. All recommendations will be made in accordance with the Society of Vertebrate Paleontology’s 2010 guidelines, and shall be subject to review and approval by the City of Downey. Work in the area of the find may only resume upon approval of a Qualified Paleontologist. MM-CR-9 In accordance with Section 7050.5 of the California Health and Safety Code, if human remains are found, the County Coroner shall be immediately notified of the discovery. No further excavation or disturbance of the site or any nearby area reasonably suspected to overlie adjacent remains shall occur until the County Coroner has determined, within two working days of notification of the discovery, the appropriate treatment and disposition of the human remains. If the County Coroner determines that the remains are, or are believed to be, Native American, he or she shall notify the Native American Heritage Commission in Sacramento within 24 hours. In accordance with California Public Resources Code, Section 5097.98, the Native American Heritage Commission must immediately notify those persons it City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-50 believes to be the most likely descendant of the deceased Native American. The most likely descendant shall complete their inspection within 48 hours of being granted access to the site. The designated Native American representative would then determine, in consultation with the property owner, the disposition of the human remains. With inclusion of MM-CR-5 through MM-CR-9, (as initially described in Section V, Cultural Resources), this potential impact would be reduced to a less than significant level. No additional mitigation measures would be required. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on tribal cultural resources would be expected. Since no potentially significant adverse tribal cultural resource impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-51 XIX. Utilities and Service Systems. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Require or result in the relocation or construction of new or expanded water, wastewater treatment or storm water drainage, electric power, natural gas, or telecommunications facilities, the construction or relocation of which could cause significant environmental effects?     b) Have sufficient water supplies available to serve the project and reasonably foreseeable future development during normal, dry and multiple dry years?     c) Result in a determination by the waste water treatment provider, which serves or may serve the project that it has adequate capacity to serve the project’s projected demand in addition to the provider’s existing commitments?     d) Generate solid waste in excess of state or local standards, or in excess of the capacity of local infrastructure, or otherwise impair the attainment of solid waste reduction goals?     e) Comply with federal, state, and local management and reduction statutes and regulations related to solid waste?     Significance Criteria Impacts on utilities and service systems will be considered significant if: - The project requires or results in the relocation or construction of new or expanded water, wastewater treatment or storm water drainage, electric power, natural gas, or telecommunications facilities. - The project would not have sufficient water supplies. - The project would not have sufficient waste water treatment. - The project would not have sufficient solid waste disposal capacity. - The project would conflict in statures, regulations, goals or standards. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-52 Discussion XIXa and XIXc) Less than significant impact. The proposed Project location generates approximately 2,037 gallons per day of wastewater from residential use based on CalEEMod data and assuming that all water used becomes wastewater. As office building space and café building, with the same assumptions, the proposed Project would generate approximately 6,968 gallons per day of wastewater, resulting in an increase of 4,930 gallons per day, as outlined above in Table 3-10. The existing sewer system in place is operated by the City of Downey and has sufficient capacity to accommodate the additional surcharge. To comply with LARWQCB requirements, City of Downey Ordinance No. 14-1330 requires that projects requiring building, grading, or construction permits comply with Low Impact Development (LID) standards to reduce pollution in urban runoff (City of Downey, 2014). The proposed Project would comply with all applicable City of Downey ordinances. For these reasons, the proposed Project would have less than significant impact. XIXb) Less than significant impact. The proposed changes in land use would not impact the water supplies at the project sites. The City of Downey has confirmed that they have sufficient water supplies available to serve the proposed Project water usage (City of Downey Public Works Department, Pers. Comm.). For these reasons, the proposed Project would have less than significant impact. XIXd and XIXe) Less than significant impact. The proposed Project location currently generates about 3.22 tons per year of solid waste from residential use based on CalEEMod data. As office building space and café building, the proposed Project would generate approximately 21.27 tons per year of solid waste, resulting in an increase of 18.05 tons per year, or 561%, as outlined in Table 3-122. Table 3-12 - Current and Proposed Waste Generation Description Tons per Year Current Residential Waste Generation 3.22 Proposed Office Waste Generation 6.99 Proposed Café Waste Generation 14.28 Total Proposed Waste Generation 21.27 Change in Waste Generation per Year + 18.05 Solid waste disposal services are provided to the City of Downey by CalMet Services Inc. Solid waste collected in the City is taken to the Downey Area Recycling and Transfer Facility, where recyclables are separated from the waste stream and the remainder is sent to landfills. All disposal of solid waste at this site would comply with federal, state, and local statutes and regulations. The City of Downey and CalMet has confirmed that there is City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-53 sufficient capacity to accommodate the additional solid waste (City of Downey Public Works Department, Pers. Comm.). For these reasons, the proposed Project would have a less than significant impact. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on utilities and service systems resources would be expected. Since no potentially significant adverse utilities and service systems resources impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-54 XX. Wildfire. Would the project: Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Substantially impair an adopted emergency response plan or emergency evacuation plan?     b) Due to slope, prevailing winds, and other factors, exacerbate wildfire risks, and thereby expose project occupants to pollutant concentrations from a wildfire or the uncontrolled spread of a wildfire?     c) Require the installation or maintenance of associated infrastructure (such as roads, fuel breaks, emergency water sources, power lines or other utilities) that may exacerbate fire risk or that may result in temporary or ongoing impacts to the environment?     d) Expose people or structures to significant risks, including downslope or downstream flooding or landslides, as a result of runoff, post-fire slope instability, or drainage changes?     Significance Criteria Impacts on wildfires will be considered significant if: - The project would substantially impair an adopted emergency response plan or emergency evacuation plan. - The project would expose project occupants to pollutant concentrations from a wildfire or the uncontrolled spread of a wildfire. - The project would exacerbate fire risk. - The project would expose people or structures to significant risks, including downslope or downstream flooding or landslides, as a result of runoff, post-fire slope instability, or drainage changes. Discussion XXa) No impact. Because the Project is within the Rives Mansion site property which is developed, there would be no impact on any adopted emergency response plan or emergency evacuation plan with the construction or implementation of this Project. XXb) No impact. The proposed Project site is located in an urbanized area of the City and is not contiguous to a designated high fire area associated with any designated wildland area according to California Public Utility City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-55 Commission (CPUC) online FireMap (CPUC, 2019). Therefore, implementation of the proposed Project would not result in the exposure of Project occupants to pollutant concentrations from a wildfire or the uncontrolled spread of a wildfire. For this reason, the proposed Project would have no impact. XXc) Less than significant impact. The proposed Project would involve the installation of utilities infrastructure in the construction of the café building and potentially in the conversion of the Rives Mansion to office space, however these infrastructures are not anticipated to exacerbate fire risk because the proposed Project site is located in an urbanized area of the City and is not contiguous to a designated high fire area associated with any designated wildland area (CPUC, 2019). XXd) No impact. In addition to the discussion provided for question XXb) regarding the location of the proposed Project site relative to high fire areas or wildland areas, the proposed Project topography is essentially planar, staying at a consistent elevation throughout the property according to Google Earth. Elevations in the area are approximately 107 feet above sea level. Overall, the City of Downey has a relatively flat topography and the possibility of landslides or downstream flooding is typically unlikely. Therefore, implementation of the proposed Project is not anticipated to expose people or structures to significant risks such as downslope flooding or landslides as a result of runoff, post-fire slope instability, or drainage changes. Implementation of the proposed Project would not result in the exposure of people or structures to the risk of landslides during a seismic event. For these reasons, the proposed Project would have no impact. Conclusion Based on these considerations, no significant adverse impacts from the proposed Project on wildfires would be expected. Since no potentially significant adverse wildfire impacts were identified, no mitigation measures are required. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-56 XXI. Mandatory Findings of Significance. Potentially Significant Impact Less Than Significant With Mitigation Less Than Significant Impact No Impact a) Does the project have the potential to substantially degrade the quality of the environment, substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal community, substantially reduce the number or restrict the range of a rare or endangered plant or animal or eliminate important examples of the major periods of California history or prehistory?     b) Does the project have impacts that are individually limited, but cumulatively considerable? (“Cumulatively considerable” means that the incremental effects of a project are considerable when viewed in connection with the effects of past projects, the effects of other current projects, and the effects of probable future projects.)     c) Does the project have environmental effects which will cause substantial adverse effects on human beings, either directly or indirectly?     XXa) Less Than Significant With Mitigation. The proposed Project would not have the potential to adversely affect the quality of the environment, reduce or eliminate any plant or animal species, or destroy prehistoric records. The proposed Project is located at a site that is part of an existing developed area, and does not contain biological resources. The Project site has been previously disturbed, graded, and developed. The proposed Project would not extend into environmentally sensitive areas and would remain within the confines of the Rives Mansion site. Because the Rives Mansion site is a registered historic resource, MM-AE-1, MM-AE-2, MM- CR-1, MM-CR-2, MM-CR-3, MM-CR-4, MM-CR-5, MM-CR-6, MM-CR-7, MM-CR-8, MM-CR-9, MM-NOISE-1, MM- NOISE-2, MM-NOISE-3 and MM-NOISE-4 have been incorporated into the proposed Project to ensure preservation of the integrity of the National Register status. For additional information, see Checklist Section I, Aesthetics, and Section V, Cultural Resources. To reduce the adverse change on the environment as it pertains to aesthetics and historical resources under CEQA to a less than significant level, the applicant will implement the following mitigation measures: MM-AE-1. The developer shall install a formal landscape in place of the open lawn indicated on the project plans located west of the main residence and south of the water tower. The formal landscape shall feature circulation, planting beds, design features, and plant materials consistent with the historical resource’s architectural style and period of construction. The qualified consultant (referenced in the existing mitigation measures) shall review the landscape plan and planting palette as part of the 50% and 100% project plan review. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-57 MM-AE-2 To protect the visual character of the existing historic Rives Mansion, the applicant must maintain the height and footprint of the proposed 1,200 sf café exactly as presented in the proposed project application. No additions, structural or mechanical, that would result in additional bulk or height to the building shall be permitted. MM-CR-1 The developer shall retain the services of a qualified consultant architectural historian or historic architect who meets the Secretary of the Interior’s Professional Qualifications Standards to prepare a historical resources treatment plan. This historical resources treatment plan will guide the architect and contractor with the following compliance standards a) which building features and materials of the three original buildings on the property should be preserved (using the character-defining features table in Attachment C of GPA Consulting 2019 report), and b) which features and materials shall be repaired and which are truly beyond repair and will require replacement. MM-CR-2 The qualified consultant architectural historian or historic architect shall review the project plans at the 50% and 100% Construction Documents stages to ensure that they continue to comply with the Secretary of the Interior’s Professional Qualifications Standards. MM-CR-3 The qualified consultant architectural historian or historic architect shall be available to perform construction monitoring for work related to character-defining features throughout construction. MM-CR- 4 If the need for a physical or chemical treatment arises on the three original buildings on the property, the developer shall inform the qualified consultant architectural historian or historic architect prior to administering any treatments or testing. The qualified consultant architectural historian or historic architect shall work with the developer, architect, and contractor to determine the gentlest means possible. Test patches shall be prepared in inconspicuous places prior to any wholesale treatments. MM-CR-5 A Qualified Archaeologist, meeting the Secretary of the Interior’s Professional Qualification Standards, shall be present for all initial ground disturbing activities associated with the proposed project. This archaeological monitor shall be responsible for the identification of cultural resources that may be impacted by project activities. The monitor may stop ground-disturbing activities in order to assess any discoveries in the field. Archaeological monitoring may be discontinued when the depth of grading and soil conditions no longer retain the potential to contain cultural deposits. The Qualified Archaeologist shall be responsible for determining the duration and frequency of monitoring. MM-CR-6 In the event that archaeological resources (sites, features, or artifacts) are exposed during construction activities for the proposed project, all construction work occurring within 50 feet of the find shall immediately stop until a Qualified Archaeologist can evaluate the significance of the find and determine whether additional study is warranted. Depending on the significance of the find under the California Environmental Quality Act (CEQA) and the CEQA Guidelines (California Public Resources Code, Section 21082; 14 CCR 15064.5(f)), the Qualified Archaeologist may exhaust the data potential of the find through the process of field level recordation and then allow work to continue. If the discovery proves significant under CEQA, additional work such as preparation of an archaeological treatment plan, testing, or data recovery may be warranted. MM-CR-7 A qualified Native American monitor with Gabrieleño lineal descent shall be present for all initial ground-disturbing activities associated with the foundation for the café. The Native American monitor shall be responsible for the identification of tribal cultural resources that may be impacted by City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-58 project activities. The Native American monitor may stop ground-disturbing activities in order to assess any discoveries in the field. Tribal monitoring may be discontinued when the depth of grading and soil conditions no longer retain the potential to contain cultural deposits. A Qualified Archaeologist will be retained to evaluate and appropriately treat any potentially significant discoveries. MM-CR-8 In the event that paleontological resources (fossil remains) are exposed during construction activities for the proposed café, all construction work occurring within 50 feet of the find shall immediately stop until a Qualified Paleontologist, as defined by the Society of Vertebrate Paleontology’s 2010 guidelines, can assess the nature and importance of the find. Depending on the significance of the find, the Qualified Paleontologist may record the find and allow work to continue or recommend salvage and recovery of the resource. All recommendations will be made in accordance with the Society of Vertebrate Paleontology’s 2010 guidelines, and shall be subject to review and approval by the City of Downey. Work in the area of the find may only resume upon approval of a Qualified Paleontologist. MM-CR-9 In accordance with Section 7050.5 of the California Health and Safety Code, if human remains are found, the County Coroner shall be immediately notified of the discovery. No further excavation or disturbance of the site or any nearby area reasonably suspected to overlie adjacent remains shall occur until the County Coroner has determined, within two working days of notification of the discovery, the appropriate treatment and disposition of the human remains. If the County Coroner determines that the remains are, or are believed to be, Native American, he or she shall notify the Native American Heritage Commission in Sacramento within 24 hours. In accordance with California Public Resources Code, Section 5097.98, the Native American Heritage Commission must immediately notify those persons it believes to be the most likely descendant of the deceased Native American. The most likely descendant shall complete their inspection within 48 hours of being granted access to the site. The designated Native American representative would then determine, in consultation with the property owner, the disposition of the human remains. MM-NOISE-1 The applicant shall build a 6-foot high masonry wall above finished grade on the northwest side of the project site. MM-NOISE-2 The applicant shall post signage in the project delivery areas requiring that delivery trucks limit idling to 5 minutes or less; requesting back up alarms be turned off, if possible; and requesting drivers by courteous to neighbors. MM-NOISE-3 In order to reduce impacts related to heavy construction equipment moving and operating on site during project construction, grading, demolition, and paving prior to issuance of grading permits, the applicant shall ensure that the following procedures are followed: o All construction equipment, fixed or mobile, shall be equipped with properly operating and maintained mufflers. o Construction noise reduction methods, such as shutting off idling equipment, maximizing the distance between construction equipment staging areas and occupied sensitive receptor areas, and using electric air compressors and similar power tools rather than diesel equipment, shall be used where feasible. o During construction, stationary construction equipment shall be placed so noise is directed away from or shielded from sensitive noise receptors where feasible. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 3-59 o During construction, stockpiling and vehicle staging areas shall be located as far as practicable from noise-sensitive receptors. o Construction shall be restricted to weekdays between the hours of 7:00 a.m. and 7:00 p.m. and Saturdays between the hours of 8:00 a.m. and 5:00 p.m. No construction shall occur on Sunday. Construction hours, allowable workdays, and the phone number of the job superintendent shall be clearly posted at all construction entrances to allow surrounding property owners and residents to contact the job superintendent. In the event the City of Downey receives a complaint, appropriate corrective actions shall be implemented, and a report of the action shall be provided to the reporting party. MM-NOISE-4 The applicant will post a sign that prohibits trash pick-up between 8:00 p.m. and 8:00 a.m. XXIb) and XXIc) Less than Significant Impact. The proposed Project does not have the potential to result in any cumulatively significant impacts because all project impacts are either no impact, less than significant impact or less than significant with mitigation measures (see Checklist Section I, Aesthetics and Section V, Cultural Resources). There would be no potential adverse impacts in any resource area which could also adversely affect humans, either directly or indirectly. Conclusion Based on the review of the environmental impacts associated with the proposed Rives Mansion Conversion Project, the proposed Project would not result in any significant adverse environmental impacts. Therefore, this MND will be circulated for public review and comment. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 4-1 4. ACRONYMS Acronym Definition ADA American Disability Act CalTrans California Department of Transportation CDOC California Department of Conservation CEQA California Environmental Quality Act CO Carbon Monoxide CO2 Carbon Dioxide CO2eq Carbon Dioxide Equivalents CPUC California Public Utilities Commission CWA Clean Water Act dBA decibels DMC Downey Municipal Code DTSC Department of Toxic Substances Control EIR Environmental Impact Report ERPG Emergency Response Planning Guideline EQ Zapp California Earthquake Hazards Zone Application FAR floor area ratio GHG Greenhouse Gas IS Initial Study IS/MND Initial Study/Mitigated Negative Declaration LACFD Los Angeles County Fire Department LACSD Los Angeles County Sanitation District LARWQCB Los Angeles Regional Water Quality Control Board lbs pounds MND Mitigated Negative Declaration MT Metric Ton NHRP National Register of Historic Places NO2 Nitrogen Dioxide NOx Nitrogen Oxides NPDES National Pollutant Discharge Elimination System O-S Open Space OSHA Occupational Safety and Health Administration City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 4-2 Acronym Definition PM Particulate Matter PM2.5 Particulate Matter with a radius less than 2.5 microns PM10 Particulate Matter with a radius less than 10 microns RWQCB Regional Water Quality Control Board SCAQMD South Coast Air Quality Management District sf Square-foot SO2 Sulfur Dioxide SOx Sulfur Oxides TACs Toxic Air Contaminants VOC Volatile Organic Compound yr year City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 5-1 5. REFERENCES Arreola, Guillermo, personal communications. City of Downey Principal Planner. Various emails and phone calls from February through May 2019. ASM Affiliates, 2018. Historic Resrouce Impacts Assessment Report for Rives Mansion, August 2018. California Department of Conservation (CDOC), 2019. California Earthquake Hazards Zone Application (“EQ Zapp”). https://maps.conservation.ca.gov/cgs/EQZApp/app/. Accessed March 26, 2019. California Public Utilities Commission (CPUC), 2019. CPUC FireMap. https://ia.cpuc.ca.gov/firemap/#. Accessed March 26, 2019. CARB. 2018. Mobile Source Emission Inventory – Categories – EMFAC 2017, Updated March 2018. https://www.arb.ca.gov/msei/categories.htm CAPCOA. 2017. California Emissions Estimator Model tm (CalEEMod), version 2016.3.2, released November 2017. Citizens for Responsible Equitable Environmental Development v. City of Chula Vista (2011) 197 Cal. App. 4th 327, 334 California, State of, Energy Commission, 2014. California Energy Demand 2014-2024 Final Forecast. http://www.energy.ca.gov/2013publications/CEC-200-2013-004/CEC-200-2013-004-V1-CMF.pdf Accessed April 22, 2019. California, State of, Energy Commission, 2018. 2019 Residential Compliance Manual for the 2019 Building Energy Efficiency Standards. https://www.energy.ca.gov/title24/2019standards/. Accessed April 22, 2019. Downey, City of, 2004. City of Downey Vision 2025 – Comprehensive General Plan Update Draft EIR, July 2004 p. 8-1. Downey, City of, 2014. Ordinance No. 14-1330. http://qcode.us/codes/downey/revisions/14-1330.pdf. Accessed March 27, 2019. EnviroStor, 2019. Department of Toxic Substances (DTSC) EnviroStor Interactive Map. https://www.envirostor.dtsc.ca.gov/public/map/?global_id=71002480. Accessed March 26, 2019. GeoTracker, 2019. State Water Resources Control Board GeoTracker Map. http://geotracker.waterboards.ca.gov/map/?CMD=runreport&myaddress=Sacramento, Accessed March 25, 2019. GPA Consulting, 2019. Historical resources Technical Memorandum. April 25, 2019 Southern California Earthquake Data Center, 2019. Significant Earthquakes and Faults – Whittier Fault. http://scedc.caltech.edu/significant/whittier.html. Accessed March 22, 2019. City of Downey | IS/MND Rives Mansion Conversion Project Trinity Consultants 5-2 SCAQMD CEQA Significance Threshold Working Group. 2010. Stakeholder Working Group Meeting #15, September 28, 2010. https://planning.lacity.org/eir/8150Sunset/References/4.E.%20Greenhouse%20Gas%20Emissions/GHG.39_S CAQMD%20GHG%20Meeting%2015.pdf SCAQMD. 2008. CEQA GHG Significance Thresholds – Attachment E, released October 2008. http://www.aqmd.gov/docs/default-source/ceqa/handbook/greenhouse-gases-(ghg)-ceqa-significance-thresholds/ghgattachmente.pdf?sfvrsn=2 SCAQMD. 2006-2008. CEQA Localized Significance Thresholds Appendix C – Mass Rate LST Look-up Tables, revised October 2009. http://www.aqmd.gov/docs/default-source/ceqa/handbook/localized-significance-thresholds/appendix-c-mass-rate-lst-look-up-tables.pdf?sfvrsn=2 SCAQMD. 2003. CEQA Localized Significance Thresholds, released October 2003. http://www.aqmd.gov/home/rules-compliance/ceqa/air-quality-analysis-handbook/localized-significance-thresholds SCAQMD. 2003. Cumulative Impacts Working Group White Paper – Appendix D Cumulative Impact Analysis Requirements Pursuant to CEQA, released September 2003. https://www.aqmd.gov/docs/default-source/Agendas/Environmental-Justice/cumulative-impacts-working-group/cumulative-impacts-white-paper-appendix.pdf?sfvrsn=4 SCAQMD. 1993. CEQA Handbook, revised March 2015. http://www.aqmd.gov/docs/default-source/ceqa/handbook/scaqmd-air-quality-significance-thresholds.pdf?sfvrsn=2 U.S. Fish and Wildlife Services, 2018. National Wetlands Inventory Map, last updated October 17, 2018. (https://www.fws.gov/wetlands/data/mapper.html. Accessed March 28, 2018 WJV Acoustics, Inc. (WJVA). 2019. Acoustical Analysis, Historic Rives Mansion, Downey, California. WJVA Report No. 19-006. Prepared for Trinity Consultants, Inc. April 16, 2019. City of Downey | Initial Study for: Rives Mansion Conversion A-1 Trinity Consultants APPENDIX A: ASM HISTORICAL REPORT August 9, 2018 Efrain Ferrer Bradenton Investment Group LLC 10933 Paramount Blvd Downey, CA 90241 Re: Historic Resource Impacts Assessment Report for Rives Mansion 10921 Paramount Boulevard, Downey, Los Angeles County, California Dear Mr. Ferrer: ASM Affiliates, Inc. (ASM) prepared this letter report as an assessment of impacts on the Rives Mansion, at 10921 Paramount Boulevard in the city of Downey, for eligibility for the National Register of Historic Places (NRHP) and the California Register of Historical Resources (CRHR). This Historic Resource Impacts Assessment Report (Report) was prepared in compliance with federal and state guidelines, Los Angeles County ordinances, and the California Environmental Quality Act (CEQA), in advance of a proposed renovation and change in use to the property (Project). EXECUTIVE SUMMARY Known historically as the James C. Rives House, the single-family residential property under study was constructed in 1911. In 1977 it was listed in the NRHP and therefore qualifies as a historical resource according to CEQA. For this report, no further archival research was conducted as the property has already been listed on the NRHP. After performing a pre-field review of the NRHP nomination and proposed Project, two of ASM’s architectural historians who meet the professional qualification standards for Architectural Historian and Historian as identified in the Secretary of the Interior’s Standards for Archaeology and Historic Preservation (36 CFR 61), conducted an intensive on-site survey of the house. The exteriors and interiors of the house and outbuildings, where accessible, were photographed and documented. ASM assessed the proposed Project to determine the impacts on the property as a historical resource. This impacts assessment was conducted in conformance with CEQA and the Secretary of the Interiors Standards for the Treatment of Historic Properties and the associated Guidelines. After careful review, ASM has determined that the project as currently designed would not have an adverse impact on the historic resource provided the recommended mitigation measures are conducted to reduce potential impacts to less than significant. Project Location and Map The property at 10921 Paramount Boulevard is located within Tract No. 8960, on a portion known as the Rives Tract. The property is bounded by Paramount Boulevard to the east, 3rd Street to the south, 7955 3rd Street to the west and an alley separating 3rd and 4th Street to the north (Figure 1). August 9, 2018 Efrain Ferrer Page 2 of 37 Project Description The proposed Project involves the remodel of an existing historic residential building and carriage house to create office space. It also includes the demolition of 1941 bungalow and construction of new commercial space. The scope of work includes an exterior trellis, landscape improvement s including the addition of a parking lot, upgrading the building to current code, the addition of an elevator and additional restrooms, and a new trash enclosure. Current Setting Rives Mansion is located on Paramount Boulevard in a busy commercial area. Most of the surrounding buildings to the east are restaurants and commercial businesses. On 3rd Street, to the west and south of the property, there is a residential neighborhood of modest one-story single-family residences dating to the 1930s and 1940s. 1.0 DESCRIPTION OF RESOURCES 10921 Paramount Boulevard The Rives Mansion is a two-and-a-half-story single-family residence constructed in 1911 in a Georgian Revival Style. It is situated on a large lot set back considerably from Paramount Boulevard (Figure 2). The primary (east) façade is dominated by a central two-story entry porch with two symmetrical pairs of ionic columns flanking the entrance (Figure 3). The columns support a flat roof portico with a classical architrave, frieze, and cornice with a dentil molding. Above, the original balustrade has been removed, but the porch is still accessed by a door in the gabled dormer with corner returns (Figure 4). Three identical dormers are located on each side of the hipped-roof home. Typical of the Georgian Revival style, the main façade is symmetrical with three bays. The central bay contains the main entrance which consists of a wood door with a central glazed panel flanked by narrow sidelights and a glazed fanlight above the door. Above the door is a second story porch with a balustrade supported by thick brackets (Figure 5). The porch is accessed by a pair of doors, originally glazed, with flanking sidelights. On the first story, the windows flanking the entrance have a tripartite design with central ten-over-one sash flanked by six-over-one sidelights. The Georgian-influenced sidelight over the central window originally had fanned decorative muntins but does not appear to have ever been glazed (Figure 6). The design on the interior windows is distinctly Craftsman and the woodwork would not have been able to accommodate the fanlight (Figure 7). The second story windows on the primary façade are paired six-over-one sash with wood frames and sills. Similar windows are located on the secondary facades as well (Figure 8). Both the north and south facades have one-story porticos. On the north side, the porch is located near the east corner and supports a second- story porch with a balustrade accessed by a glazed door. The portico on the south façade was originally a porte-cochere that extended over the driveway (Figure 9). It was shortened to its current width when 3rd Street was widened in the 1950s (Figure 10). On the west façade, the kitchen area supports an additional balcony with a balustrade accessed by a glazed door (Figure 11). This facade has the most unique fenestration pattern that includes a rear entrance and large second-story window that may have been altered. The house is clad in narrow clapboards with a cornice and dentil molding detail below the roofline on all facades (Figure 12). The interior features include wood flooring and wood detailing, consisting of crown molding, high wainscoting, doors and windows with wide surrounds, and built-in cabinetry. The entry hall features a double-L stairway with an open stringer, square paneled newel posts and a turned Colonial balustrade (Figure 13). A built-in bench is located in the open well of the stairway. The dining room located to the north of the entry hall has a built-in side bar with leaded glass doors above and cabinets below (Figure 14). The wainscoting has square and vertical panels topped by a thick cornice. French doors on the north provide August 9, 2018 Efrain Ferrer Page 3 of 37 access to the side portico (Figure 15), and to the south sliding paneled pocket door separate the dining room from the entry hall. The dining room has several Craftsman features such as the tripartite multi -light over one windows and beamed ceiling. It is interesting to note the contrast between the interior appearance of the windows with the Palladian Georgian-influenced style on the exterior. To the south of the entry hall is a parlor with thick crown molding separated from the entry hall by flanking columns elevated on paneled pedestals. Sliding pocket doors separate the parlor from a sitting room with a fireplace on the west façade (Figure 16). The kitchen in the northwest corner has been altered, but the adjacent informal dining room retains its original board and batten wainscoting. It has a built -in cabinet with leaded glass doors above drawers below (Figure 17). The upstairs contains five bedrooms with hardwood floors and thick base moldings (Figure 18). All of the doors are original with five horizontal rectangular panels (Figure 19). The finished attic has hardwood floors with a thick base molding and wainscoting with framed horizontal panels (Figure 20). The dormers provide the lighting on three sides of the open room (Figure 21). There are three additional structures located on the property. The carriage house is located at the west end of the yard. Like the main house, the carriage house has a hipped roof with a gabled dormer punctuating the second story on each facade (Figure 22). The south facade has a large central door with a standard door to the west and window to the east. There are double doors located in the dormer (Figure 23). The west façade has a large sliding door toward the south side flanked by smaller four-light fixed sash. A pair of six- light sash is located in the dormer (Figure 24). The dormer on the north façade contains doors, as on the south facade, centered over a large sliding door flanked by windows (currently boarded). An additional sliding door is located near the west corner (Figure 25). Finally, the east façade has a standard door near the south corner and two tall double-hung sash windows. There are two six-light casement sash windows in the dormer as on the west facade (Figure 26). The carriage house is clad in narrow clapboards and few decorative details with the exception of the corner returns on the dormers. Another outbuilding is the water tower located to the east of the carriage house. It is a three -story square structure that is wider at the base and narrows at the top (Figure 27). It has a hipped roof and is clad with narrow clapboard siding. The top story has an arched vent on the east and west facades (Figure 28). The north and south facades have no windows, but each has a door at the base. The first story of the east and west facades each have a rectangular window with a smaller square window above at the second level. At the northeast corner of the property is a small bungalow built in 1941 according to a ssessor’s records. The small house has a rectangular plan and is capped with a front gable roof. It is clad in clapboards and rests on a concrete slab foundation. On the west facade the fenestration consists of a door flanked by sidelights and a multi-light slider sash that appears to be a replacement of the original (Figure 29). Two large multi-light windows are located on the south facade. The front (east) facade has an entrance with a square glazed panel and an additional multi-light picture window. The entrance is sheltered beneath a small awning and accessed by concrete steps. Landscape features include a walnut tree that dates to when the property contained a walnut orchard, as well as some plantings around the building. A large grass lawn fronts the house which is set back from Paramount Boulevard. Character-Defining Features Primary character-defining features of Rives Mansion and the outbuildings are listed below. Exterior • The three porticos visible from the street are primary character-defining feature of Rives Mansion, particularly the two-story portico on the primary façade. August 9, 2018 Efrain Ferrer Page 4 of 37 • The balustrades along the first story porch, central porch on the main façade and side porches are an important design element. An additional balustrade was originally located on the third story and in front of the attic door on the primary façade. • The original windows, particularly the Palladian windows flanking the entrance on the main façade. • The four gabled dormers on the third story remain a character -defining feature despite the loss of some of the cornice details. • The Water Tower with its distinctive battered profile and pyramidal hipped roof. • Carriage House arrangement of fenestration on the upper story to echo the dormers on the main house. • The spatial relationship between the house and the outbuildings (specifically the Water Tower and Carriage House) is an important historic feature Interior • Dining room wainscoting, ceiling beams, pocket doors and built-in are significant as it is a primary interior space and reflect the Craftsman style. • Parlor details such as the flanking pedestal columns, base molding, pocket doors and fireplace. • Informal dining room wainscoting and built-in cabinet. • Staircase newel posts, balusters and built-in bench. • Hardwood floors and original five-panel doors and hardware throughout. 2.0 SUMMARY OF PREVIOUS FINDINGS National Register of Historic Places Nomination for James C. Rives House The Rives House was listed in the NRHP in 1977 as a unique example of the Georgian Revival style and for its association with the agricultural history of Downey and significant local individual, James C. Rives. When completed in 1912, the Rives House was by far the most imposing residence in the community of Downey. The structure was built for James C. Rives, born in Atlanta, Georgia, in 1864, one of Downey's most prominent citizens at that time. Rives came to Downey as a young man, became publisher of the Downey Review for a short time, and was admitted to the bar in 1887. After a short career as a local lawyer, he served as Los Angeles County District Attorney (1899-1902) and as a judge of the Superior Court of the County. He was also a walnut grower in Downey in his later years. In 1911 Rives commissioned Los Angeles architects Neher & Skilling to design a new residence for him in Downey. The Georgian Revival structure that resulted was the most elegant residence in the area, an adaptation of a style which was very popular in southern California in the first two decades of the twentieth century. No doubt the design of the house was influenced by many of the Georgian mansions in Rives' home state. The structure exhibited many details such as Ionic columns which made it architecturally unique in its area and an important visual landmark for local citizens and visitors. August 9, 2018 Efrain Ferrer Page 5 of 37 After Rives’ death, the property was acquired by the present owners and much of the land around it was subdivided for residential units. Paramount Boulevard became a commercial thoroughfare which put pressure on the large lot that would threaten the existence of the house. At the time the property was listed on the NRHP, there was local publicity about the possible retention of the property, either to be saved by the city of Downey or by a local service group. Since many of Downey's oldest landmarks have been destroyed over the years because of rapid development, the NRHP nomination stated that the Rives House is the most important link to the agricultural community of Downey before its mass suburbanization after World War II. Alterations to this structure have been minimal. A turned-wood balustrade which was originally located along the entire roofline, and the decorative brackets originally on the dormers have been removed. When Third Street was widened in the 1950’s, the large portico on the southern side of the house was shortened in length so that it now almost perfectly matches its counterpart on the north side. Minor modifications have taken place in the interior, which is almost in its original condition. Also noted in the NRHP nomination are the large lot, wooden water tower (used as a storage shed at the time of the nomination), and a wal nut- drying structure which closely resembles a carriage house. ASM concurs with the previous assessment that the Rives Mansion is eligible for the NRHP under Criteria A, B, and C. It is eligible under Criterion A for its association with the agricultural history of Downey and Criterion B for its association with James C. Rives. In addition, it is eligible under Criterion C as a unique example of the Georgian Revival style. 3.0 IMPACTS ASSESSMENT ASM carefully reviewed the project’s potential impacts according to the applicable Secretary of the Interior’s Standards for the Treatment of Historic Properties (Standards). Secretary of Interior’s Standards Under CEQA, a proposed development must be evaluated to determine how it may impact the potential eligibility of a structure or a site for designation as a historic resource. The Standards were developed as a means to evaluate and approve work for federal grants for historic buildings and then for the federal rehabilitation tax credit (see 36 CFR Section 67.7). Therefore, the Standards are used for regulatory approvals for designated resources but not for resource evaluations. Similarly, CEQA recognizes the value of the Standards by using them to demonstrate that a project may be approved without an Environmental Impact Report (EIR). The SOI Standards for Rehabilitation are the appropriate approach to apply to this Project and are restated and analyzed in the following section. Standard 1: A property will be used as it was historically or be given a new use that requires minimal change to its distinctive materials, features, spaces, and spatial relationships. This Standard is relevant to the Project because it involves the conversion of the Rives Mansion, previously used as a residence and event location, to an office space. Ideally, Rives Mansion would continue to be used as a residence or event location in order to eliminate the addition of an elevator and expanded accessibility requirements that necessitate the removal of historic fabric. Assuming the rehabilitation project requires the change in use, it is important that the distinctive features, materials, and spatial relationships of the historical resource are not significantly impacted. Regarding interior spaces, the Standards state that primary spaces, such as lobbies, parlors and living rooms, are generally more significant than secondary spaces such as kitchens, bathrooms, and utility rooms. As currently planned, the elevator and expansion of August 9, 2018 Efrain Ferrer Page 6 of 37 the lobby restroom does not affect the configuration or spatial relationships of the building’s primary spaces. However, it does require the removal of an original built-in feature that contributes to the historic character of Rives Mansion (see Figure 17). The conversion in use also requires the addition of a ramp to the north of the building. As planned, the addition of the ramp does significantly change the historic character of the property. In addition, the Project includes the conversion of the carriage house to offices and the water t ower to restrooms. According to the Standards, it is recommended that the historic relationship between the buildings on the site and the landscape is maintained. The change in use of these buildings does not appear to impact the historic character of the outbuildings, or the relationship betwee n the buildings and the main house. Standard 1 Conformance: Although the Project involves the conversion of the property to a use that is not in keeping with its historic use, it involves minimal change to the distinctive features of the historic resource. Retention and possible relocation of the removed built-in feature is recommended to offset loss of historic fabric, but otherwise the Project conforms to Rehabilitation Standard 1. Standard 2: The historic character of a property will be retained and preserved. The removal of distinctive materials or alteration of features, spaces, and spatial relationships that characterize a property will be avoided. As planned, the Project attempts to retain and preserve most of the distinctive materials, features, and spaces of the historical resource. The plans call for the addition of 30 parking spaces located north, northeast, and west of the house. While most of the proposed parking spaces are in compliance with the Standards, the spots marked 1-6 have the potential to impact the historic views to and from the house (Figure 30). Standard 2 states that the spaces and special relationships that characterize a property should be preserved. According to the California State Historical Building Code (CHBC), the natural features and manmade landscape elements surrounding a qualified historical building are components of the resource (CHBC 8-1001.2). Where the application of regular code will impact the resource, the CHBC can be used to provide sensitive alternatives for treatment of the associated feature (CHBC 8-1003). The City may therefore be willing to reduce the required number of spaces to 24 in order to preserve the historic relationship between the house and the lawn. Standard 2 Conformance: The Project retains most of the physical materials and features that contribute to the historic character of Rives Mansion. The addition of six parking spaces at the front of the house has the potential to impact the spatial relationship between house and the front lawn, otherwise the Project conforms to Rehabilitation standard 2. Standard 3: Each property will be recognized as a physical record of its time, place, and use. Changes that create a false sense of historical development, such as adding conjectural features or elements from other historic properties, will not be undertaken. The Project as planned involves no changes that would create a false sense of historical development. It is recommended that decisions such as roof colors and materials not be based on simil ar historic properties but on physical or photographic evidence of what existed historically at the Rives Mansion. Standard 3 Conformance: Rives Mansion will remain as a physical record of its time, place, and historic use with no conjectural features added. Therefore, the Project complies with Rehabilitation Standard 3. Standard 4: Changes to a property that have acquired historic significance in their own right will be retained and preserved. August 9, 2018 Efrain Ferrer Page 7 of 37 The most significant alteration to the property was the reduction in size of the south loggia when 3rd Street was expanded. The Project calls for the retention of the rebuilt porch which has now attained historic significance in its own right. The other significant alteration would be the demolition of the 1941 house located at the northeast corner of the lot. The Project calls for the construction of a new retail building at that location. As the house falls outside of the period of significance of Rives Mansion and was not directly associated with activities contributing to the agricultural significance of the property, it has not acquired a historic significance in its own right. Standard 4 Conformance: The Project conforms to Rehabilitation Standard 4 because it does not involve the removal of alterations or additions that have acquired historic significance. Standard 5: Distinctive materials, features, finishes, and construction techniques or examples of craftsmanship that characterize a property will be preserved. The majority of the character-defining features listed in the previous section will be preserved as part of the Project. The one exception is the built-in in the informal dining room that will be removed to accommodate the lobby restroom (see Standard 1). Any balustrades that have not deteriorated should be retained and not replaced. Standard 5 Conformance: As stated in Standard 1, it is recommended that the built-in cabinetry be salvaged as it is a character-defining feature. Otherwise the Project conforms with Standard 5 provided balusters are not unnecessarily replaced. Standard 6: Deteriorated historic features will be repaired rather than replaced. Where the severity of deterioration requires replacement of a distinctive feature, the new feature will match the old in design, color, texture, and, where possible, materials. Replacement of missing features will be substantiated by documentary and physical evidence. The Project plan calls for the replacement of deteriorated balustrades with new ones that meet code requirements. In many cases this would require a higher balustrade which would alter the historic character of the building. Although written for wood porches, Preservation Brief 45 deals with compromises between city building codes and the needs of a historic building. It states that “successful rehabilitation work achieves a balance between building and safety code consideration and the retention of historic design and materials” (Sullivan 17). The Brief suggests that in cases where the local code requirements would threaten the historic character of the porch, alternatives that reconcile the two should be explored. Furthermore, the CHBC states that when a qualified historic building has a change in use “the change in occupancy shall not mandate conformance with new construction requirements as set forth in regular code” (CHBC 8-302.2). Alternatives such as a simple rail above the balustrade can provide a less intrusive solution when the code requirements much be met, but a compromise with the city given the perceived risk of maintaining the original balustrade height should first be considered. Also, it is recommended that when deteriorated materials must be repaired or replaced that they should match the original materials as closely as possible. Using foam or other alternatives to simulate the appearance of the original is not recommended. Standard 6 Conformance: Overall, the proposed Project is sensitive to the repair and replacement of deteriorated features with elements matching the original. It is important to consider compromises or alternatives to replacing the original balustrades in order to meet code requirements, and to use original materials when replacing missing features. Provided compromises and alternatives are explored, the Project conforms to Standard 6. August 9, 2018 Efrain Ferrer Page 8 of 37 Standard 7: Chemical or physical treatments, if appropriate, will be undertaken using the gentlest means possible. Treatments that cause damage to historic materials will not be used. The Project, as proposed, does not include the discussion of chemical or physical treatments to the property, therefore this Standard does not apply. Standard 8: Archeological resources will be protected and preserved in place. If such resources must be disturbed, mitigation measures will be undertaken. Rehabilitation Standard 8 would only apply during the construction of the new retail building. Although not likely, it is recommended that an archaeologist be consulted if any resources are discovered during any earth-moving activity. Standard 9: New additions, exterior alterations, or related new construction will not destroy historic materials, features, and spatial relationships that characterize the property. The new work will be differentiated from the old and will be compatible with the historic materials, features, size, scale and proportion, and massing to protect the integrity of the property and its environment. Rehabilitation Standard 9 pertains to the construction of the new retail building in the current location of the 1941 bungalow. The one-story, 1,095 square foot building has a rectangular footprint with a side-facing gable roof at its southeast corner. It has wood siding and storefront windows, some divided by muntins (Figure 31). According to the plans, the new building appears to be compatible with Rives Mansion in terms of materials, features, size scale and proportion. It occupies an area previously occupied by the bungalow and its footprint is not substantially larger. It is also clearly differentiated from the historic resource in terms of features and style. Standard 9 Conformance: The new retail building located on the Rives Mansion property is in conformance with Rehabilitation Standard 10 because it is clearly differentiated from the historical resource while compatible with the historic materials, features, size, proportion and massing. Standard 10: New additions and adjacent or related new construction will be undertaken in such a manner that, if removed in the future, the essential form and integrity of the historic property and its environment would be unimpaired. Rehabilitation Standard 10 applies to the construction of the new retail sp ace that replaces the 1941 bungalow at the northeast corner of the property. As it is located at a distance from Rives Mansion and occupies a location that has been developed over 50 years ago, its future removal would have no impact on the form or integrity of the historic resource. Standard 10 Conformance: The Project, as planned, is in conformance with Rehabilitation Standard 10 as the new construction is not directly connected to the historic resource and can be easily removed with no impact. 4.0 RECOMMENDED MITIGATION In accordance with Section 15126.4 of the CEQA Guidelines, feasible measures should be considered that minimize the any adverse impacts on the Rives Mansion. Implementation of the below recommended mitigation measures would reduce potential adverse impacts to less than significant. August 9, 2018 Efrain Ferrer Page 9 of 37 1. Salvage the built-in cabinet in the informal dining room when the wall is demolished for the construction of the lobby restroom and elevator. If possible, relocate the cabinet to the new space or another office on the first floor. 2. Negotiate with the city to reduce the number of required parking spaces in order to preserve the original lawn space fronting the building. If it is not possible to reduce the number of spaces, consider changing the six spaces to two parallel parking spots which would have less of a visual impact and retain more of the lawn. 3. Consider alternatives to replacing the original balustrades with an inappropriate design for the purpose of meeting city codes. The CHBC provides a tool for working with the city to preserve this important character-defining feature or implementing an alternative that will have less of a visual impact. 4. When repairing or replacing damaged historic features such as the column capitals, use appropriate materials that match the original as closely as possible. 5.0 CONCLUSION After careful review, ASM has determined that the Project, as currently designed, would not have a substantial adverse impact on the historical resource, the Rives Mansion. Character-defining features of the building are essentially retained, and the design of the new building is differentiated from and compatible with the historical resource in terms of materials, size, scale and massing. If the recommended mitigation measures are undertaken, the potential for adverse impacts to the historical resource will be reduced to less than significant and the Rives Mansion would remain eligible for listing in the NRHP and the CRHP. Please contact me as needed, if you have questions or concerns. Sincerely, Shannon Davis Director, Architectural History ASM Affiliates, Inc. 20 North Raymond Avenue, Suite 220 Pasadena, California 91103 (626) 793-7395 sdavis@asmaffiliates.com August 9, 2018 Efrain Ferrer Page 10 of 37 REFERENCES National Park Service, National Register of Historic Places 1998 How to Apply the National Register Criteria for Evaluation. National Register Bulletin No. 15. Washington, D.C. Office of Historic Preservation 1995 Instructions for Recording Historical Resources. 2001 How to Nominate a Resource to the California Register of Historical Resources. Technical Assistance Series #7. Stitton, Tom. 1977 National Register of Historic Places Inventory Nomination Form for the James C. Rives House. Sullivan, Aleca and John Leeke 2006 Preserving Historic Wood Porches. Preservation Brief No. 45. National Park Service. Washington, D.C. https://www.nps.gov/tps/how-to-preserve/preservedocs/preservation- briefs/45Preserve-Brief-WoodPorches.pdf Weeks, Kay, et al. 2001 Secretary of the Interior’s Standards for the Treatment of Historic Properties; NPS online publication: http://www.nps.gov/hps/tps/standguide/. Accessed June 2018. Wyoming Bureau of Land Management (BLM) 2006 Programmatic Agreement Among the Wyoming Bureau of Land Management, Advisory Council on Historic Preservation, and the National Conference of State Historic Preservation Officers Regarding the Manner in Which BLM Will Meet Its Responsibilities Under the National Historic Preservation Action. State Protocol between the Wyoming Bureau of Land Management State Director and the Wyoming State Historic Preservation Office. August 9, 2018 Efrain Ferrer Page 11 of 37 FIGURES Figure 1 Map of 10921 Paramount Boulevard and vicinity August 9, 2018 Efrain Ferrer Page 12 of 37 Figure 2 East façade of Rives Mansion looking southwest Figure 3 Detail of columns on east façade August 9, 2018 Efrain Ferrer Page 13 of 37 Figure 4 View of east façade showing attic dormer Figure 5 Detail of main entrance showing brackets supporting porch. August 9, 2018 Efrain Ferrer Page 14 of 37 Figure 6 Detail of first story window looking north. Figure 7 Dining room window showing no accommodation for fanlight. August 9, 2018 Efrain Ferrer Page 15 of 37 Figure 8 North facade showing typical six-over-one windows. Figure 9 Historic photo showing original extended porte-cochere. August 9, 2018 Efrain Ferrer Page 16 of 37 Figure 10 South façade showing shortened porch. August 9, 2018 Efrain Ferrer Page 17 of 37 Figure 11 West façade looking northeast Figure 12 Detail of dentil molding August 9, 2018 Efrain Ferrer Page 18 of 37 Figure 13 Main entrance stairway looking southwest. Figure 14 Detail of built-in cabinet in dining room. August 9, 2018 Efrain Ferrer Page 19 of 37 Figure 15 Dining room showing French doors, looking north Figure 16 Parlor looking west to fireplace. August 9, 2018 Efrain Ferrer Page 20 of 37 Figure 17 Informal dining room built-in cabinet. Figure 17 Second story room looking northeast. August 9, 2018 Efrain Ferrer Page 21 of 37 Figure 19 Typical five-panel wood door on second story. August 9, 2018 Efrain Ferrer Page 22 of 37 Figure 20 Attic door and wall detail. Figure 21 Attic showing dormer, looking north. August 9, 2018 Efrain Ferrer Page 23 of 37 Figure 22 Oblique view of carriage house looking northeast. Figure 23 South facade of carriage house. August 9, 2018 Efrain Ferrer Page 24 of 37 Figure 24 Carriage house west facade. Figure 25 North facade of carriage house looking southeast. August 9, 2018 Efrain Ferrer Page 25 of 37 Figure 26 East façade of carriage house looking west. Figure 27 Water tower and carriage house looking northwest. August 9, 2018 Efrain Ferrer Page 26 of 37 Figure 28 West facade of water tower. Figure 29 Bungalow located on the property, looking northeast. August 9, 2018 Efrain Ferrer Page 27 of 37 Figure 30 Detail of Project plans showing parking spaces that cut into lawn space. August 9, 2018 Efrain Ferrer Page 28 of 37 Figure 31 Concept image of new retail space. August 9, 2018 Efrain Ferrer Page 29 of 37 RESUMES Shannon Davis, M.A., RPH Architectural Historian/Historian Total Years of Experience: 20 Education: M.A. 1998/Historic Preservation/George Washington University, Washington, D.C. B.A. 1993/American History/University of Southern California, Los Angeles (Cum laude with honors) Registrations 2011 Register of Professional Historians (No. 613) Professional Profile: Ms. Davis has 20 years of experience in the field of historic preservation. She has an MA in Historic Preservation/American Studies from George Washington University, where she wrote her master's thesis on the architectural history of drive-in theaters, and a B.A. in American History from the University of Southern California. As an Architectural Historian at ASM, Ms. Davis has documented and evaluated numerous cultural resources for California Environmental Quality Act (CEQA) and National Register of Historic Places (NRHP) compliance, prepared Historic Structures Reports (HSRs), Historic American Building Surveys (HABS), and conducted NRHP evaluations and nominations. Recent projects include a comprehensive city-wide survey of Chula Vista; successfully listing a property in the Cali fornia Register of Historical Resources (CRHR); preparing NRHP nominations for a historic highway and a historic residential district; developing the historic context of Los Angeles military history for Survey LA; and preparing planning documents for several California Naval bases. Before joining ASM, Ms. Davis worked for the National Trust for Historic Preservation as their west -coast representative for heritage tourism. Much of Ms. Davis’s professional experience is with the cultural resources programs of the National Park Service (NPS). For eight years she worked for the NRHP as an Historian. She also worked as a Historic Preservation Specialist and Project Manager for three other NPS programs: American Battlefield Protection Program, NPS History Program and HABS/HAER/HALS/CRGIS. Ms. Davis has experience with the operational requirements of a historic site, through her position as Assistant Site Manager of the 1812 Federal home of Supreme Court Justice Gabriel Duvall. Additionally, Ms. Davis served for several years as Chair of a local preservation advocacy group, the Arlington Heritage Alliance, and was one of the founders of the national non-profit Recent Past Preservation Network. Selected Project Experience: HRER for 880 Stone Canyon, Los Angeles County, CA Project Manager CLIENT: City of Los Angeles Office Historic Preservation Surveyed, documented, and evaluated 1936 single-family residence built in the Hollywood Regency style by architect Douglas Honnold for screenwriter Stanley Rauh. Evaluated within the City of Los Angeles’s Survey LA historic context statements for Residential Development and Suburbanization, 1850-1980 and Architecture and Engineering, 1850-1980, with the theme/subtheme of the Hollywood Regency, 1850-1980. Conducted in compliance with CEQA by request of the City of Los Angeles’s Office of Historic Resources. Historic Resources Evaluation Report for the Beckman Instruments Administration Building, Fullerton, Orange County, CA August 9, 2018 Efrain Ferrer Page 30 of 37 Project Manager and Senior Architectural Historian CLIENT: BonTerra Psomas Prepared evaluation and impact assessments report for development project with the potential to impact the Beckman Instruments Administration Building, a Mid-Century Modern building constructed as the headquarters for, a large scientific instrument research and manufacturing facility. Reviewed the pending National Register nomination, conducted site visit, and assessed direct and indirect impacts. Conducted in compliance with CEQA for the City of Fullerton as the Lead Agency. Impacts Assessment Report for Subdivision of Sepulveda Unitarian Universalist Society Sanctuary (“The Onion”) Property, North Hills, Los Angeles County, CA Project Manager and Senior Architectural Historian CLIENT: Jag Narayan Prepared impacts assessment report for parcel subdivision of Sepulveda Unitarian Universalist Society Sanctuary (known as “The Onion”) at 9550 N. Haskell, designated City of Los Angeles Historic Cultural Monument (#975). The report, which focused on viewshed impacts to and from the HCM, was prepared pursuant to CEQA at request of LA Office of Historic Resources. Mt. San Antonio College Cultural Resources Evaluation Report, Walnut, Los Angeles County, CA Project Manager and Senior Architectural Historian CLIENT: Mt. San Antonio College Prepared cultural resources evaluation report for Supplemental EIR for the 2015 Facilities Master Plan Update and Physical Education Projects. The report evaluated more than 20 historic resources within the school’s proposed project area, and to assess potential direct and indirect visual impacts to the Mt. SAC Historic District. Work included intensive pedestrian-level survey of potentially significant historic buildings on campus, as well as the Wildlife Sanctuary, and archival research. Report prepared i n compliance with CEQA. HRER for 427 Santa Clara Avenue, Los Angeles. Los Angeles County, CA Project Manager and Senior Architectural Historian CLIENT: Huron Drive LLC Evaluated a 1912 bungalow located in the Venice area of Los Angeles for CEQA compliance of a proposed project. Conducted a site visit and background research. Prepared documentation for determination of historic significance under NRHP, CRHR, City of Los Angeles Historic Cultural Monument and under contexts and themes defined by SurveyLA. Work was done in compliance with CEQA at request of LA Office of Historic Resources. HRER for Academy Road Widening Project, Sanger, Fresno County, CA Senior Architectural Historian CLIENT: Petra Resource Management Conducted a historic study to address road widening and reconstruction of Academy Avenue in Sanger. Performed intensive field survey and archival research to develop sufficient historic overview and site- specific histories. Made recommendations of eligibility for listing in the NRHP and CRHR for potentially historic buildings in the APE. Evaluated in compliance with requirements of Section 106 of the National Historic Preservation Act (NHPA), CEQA, and Caltrans guidelines as specified in the agency’s Standard Environmental Reference (SER), Volume 2, Cultural Resources. Bayshore Bikeway Project HPSR, ASR and FNAE, San Diego County, CA Senior Architectural Historian CLIENT: San Diego Association of Governments In accordance with Caltrans Section 106 PA and CEQA, prepared HPSR and FNAE for bikeway project with the potential to impact the Western Salt Company Salt Works (WSCSW) Historic District. ASM recommended a FNAE without Standard Conditions as none of the character defining features of historic district would be adversely affected as a result of the proposed project activities. Reports prepared following updated Caltrans SER, Volume 2, Cultural Resources. HRER for Two Buildings at Hoover High School, San Diego, San Diego County, CA August 9, 2018 Efrain Ferrer Page 31 of 37 Project Manager and Senior Architectural Historian CLIENT: BRG Consulting for San Diego Unified School District Surveyed, documented, and evaluated two mid-20th century buildings at Hoover High School: a Spanish Colonial Revival 1938-1942 classroom building and 1942-1970s Art Deco/Modern auditorium, built by master architects Kistner and Curtis. Evaluated within the local contexts of education, economics, social history, and architecture. Conducted in compliance with CEQA. HRER for Vista/Highgrove Substation, Grand Terrace, San Bernardino County, CA Senior Architectural Historian CLIENT: Southern California Edison Surveyed, documented, and evaluated a mid-20th century vernacular electrical substation complex constructed in 1945. Researched local historic context. Evaluated within the contexts of mid-twentieth century development of Grand Terrace or San Bernardino County and architecture. Conducted in compliance with CEQA. HABS Documentation and Interpretive Signage, Marron-Hayes Adobes Historic District, Carlsbad, San Diego County, CA Project Manager and Senior Architectural Historian CLIENT: Corky McMillin Companies Conducted official HABS Level II documentation for the Marron-Hayes Adobes Historic District, and coordinated submission with the HABS National Park Service headquarters office. Prepared outline history, large format photography, and sketch drawings. De veloped content for interpretive signage including narrative text and historic photographs. Conducted in compliance with CEQA and Section 106 of the NHPA. HRER for Grove Street Bible Church, Pomona, Los Angeles County, CA Project Manager and Senior Architectural Historian, 2014 CLIENT: Warmington Residential Surveyed, documented, and evaluated a Mid-Century Modern church constructed in 1961. Researched and developed local historic context. Evaluated within the contexts of mid-twentieth century development of Pomona and architecture. Conducted in compliance with CEQA. Historic Resources Evaluation Report (HRER) for Imperial Beach Library, San Diego County, CA Project Manager and Senior Architectural Historian CLIENT: Dudek Surveyed, documented, and evaluated a Mid-Century Modern library constructed in 1967. Evaluated the building within the contexts of community development, government services, and Modern architecture. Report to be prepared in accordance with CEQA. Impacts Assessment for Construction of Lemon St. Parking Garage, Orange County, CA Project Manager and Senior Architectural Historian CILENT: HDR Engineering, Inc. Assessed and evaluated direct and indirect impacts on the construction of a parking garage on the Old Towne Orange and Plaza historic districts for three project alternatives in support of an Mitigated Negative Declaration. Participated in SHPO consultation process. Conducted in compliance with Section 106 of the NHPA, NEPA, CEQA, and Federal Highway Administration's (FHWA) Section 4(f) regulations. Impacts Assessment for Renovation of AMK Ranch Historic District, Teton County, WY Project Manager and Senior Architectural Historian CLIENT: University of Wyoming and Walsh Environmental Assessed and evaluated direct and indirect impacts on the historic AMK Ranch Historic District for three project alternatives for their renovation and expansion, in support of an Environmental Assessment (EA). Conducted on-site survey with National Park Service’s Cultural Resources Specialist to identify potential areas of impact. Coordinating consultation with the Wyoming State Historic Preservation Office (SHPO). Visual Impacts Assessment on the Marron-Hayes Adobes Historic District for the Quarry Cree k Master Plan Environmental Impact Report, San Diego County, CA August 9, 2018 Efrain Ferrer Page 32 of 37 Senior Architectural Historian CLIENT: Corky McMillin Companies Conducted a visual impacts assessment of the impacts of a housing development project on the Marron - Hayes Adobes Historic District, eligible for the NRHP. Recommended mitigation measures to address adverse indirect visual impact. Attended and testified at series of local planning commission and city council meetings. Conducted in compliance with CEQA and Section 106/NHPA. HRER for Garfield Reservoir, Los Angeles County, CA Project Manager and Senior Architectural Historian CLIENT: Helix Environmental Planning, Inc. Surveyed, documented, and evaluated public water storage reservoir constructed in 1924. Evaluated within the contexts of community planning and development and architecture. Conducted in compliance with CEQA and NHPA. HABS, HRCR, and FAE for Sorrento Valley Industrial Park, San Diego County, CA Senior Architectural Historian CLIENT: Caltrans Prepared Caltrans specific compliance for the proposed demolition of the Sorrento Valley Industrial Park Historic District. Summarized identification efforts and resources eligible for the NRHP, identified the effect of the project upon those resources, and prepared mitigation plan in compliance with CEQA and Public Resources Code (PRC) §5024. Prepared HABS Level II documentation (Caltrans Heritage documentation equivalent) as well as Finding of Adverse Effect (FAE) per Caltrans format. Impacts Assessment for the SDG&E East County Substation Project, San Diego County, CA Senior Architectural Historian CLIENT: Sunrise Powerlink Analyzed potential for adverse effects from proposed SDG&E East County Substation Project. Provided recommendations for NRHP and CRHR eligibility for an approximate 14-mile (mi.) segment of Old Highway 80 within the APE, determined in consultation with BLM. Conducted in compliance with NHPA and CEQA. Highway 80 Interpretive Signage Recommendations for the SDG&E East County Substat ion Project, San Diego County, CA Senior Architectural Historian CLIENT: Sunrise Powerlink Surveyed historic Highway 80 to make recommendations for placement of interpretive signs. Recommendations for signs were made based on integrity of Highway 80 at spe cific locations, character of specific sections of the highway, and demarkation at regular intervals. a Conducted in compliance with NHPA and CEQA. Impacts Assessment for SDG&E East County Substation Project, San Diego County, CA Senior Architectural Historian CLIENT: Insignia Environmental Consulted on and edited an evaluation and visual impacts assessment of a 13-mi. segment of historic Old Highway 80. Insignia Environmental requested this assessment for their powerline project in east San Diego County. HSR for Palomar College, San Diego County, CA Architectural Historian CLIENT: Palomar College Consulted on and reviewed HSR for seven buildings at Palomar College. In compliance with CEQA, each building was evaluated for eligibility for the NRHP, CRHR, and as a CEQA historic resource. August 9, 2018 Efrain Ferrer Page 33 of 37 Laura Taylor Kung, M.A. Architectural Historian Firm Name: ASM Affiliates, Inc., Pasadena, California Total Years of Experience: 9 Employment History: 2017-Present Architectural Historian, ASM Affiliates, Inc., Pasadena, California 2002-2007 Collections Cataloguer, Autry Museum of West Heritage, Los Angeles, California 2001-2002 Cultural Resources Associate, PCR Services Corporation, Santa Monica, California 1999-2002 Collections Contractor, Los Angeles County Museum of Art, Los Angeles, California 1998-2000 Freelance Consultant, San Buenaventura Research Associates, Santa Paula, California 1996-1997 Cultural Resources Specialist, Earth Tech, Colton, California 1995 Intern, National Park Service, Harpers Ferry, West Virginia 1994-1996 Teaching Assistant, Cornell University 1993-1994 Preservation Planning Intern, Chicago Park District, Chicago, Illinois Education: M.F.A. 2011/Fiction and Literature/Bennington College M.A. 1998/Historic Preservation Planning/Cornell University B.A. 1993/Art History/DePaul University Additional Training: 1997 Section 106 Workshop Professional Memberships: Los Angeles Conservancy California Preservation Foundation National Trust for Historic Preservation Other Capabilities: Expertise in copy editing and proofreading Expertise in Windows and Macintosh platforms Citizenship: USA Languages: Proficient in Norwegian References: Michael Tomlan, Cornell University, 607-255-7261, mat4@cornell.edu Rebecca Menendez, Autry National Center, 323-667-2000, rmenendez@theautry.org Jan Ostashay, Ostashay and Associates, 562-500-9451, historics@aol.com August 9, 2018 Efrain Ferrer Page 34 of 37 Professional Profile: Ms. Kung has nine years of experience in historic preservation and planning, including the completion of local and state building surveys, Historic Building Inventory and Evaluation documents, National Register nominations, Historic American Building Survey (HABS) submissions, Historic Structure Reports and Cultural Resources management plans. Selected Project Experience: Historic Resource Assessment and Impacts Report for 3260 Fryman Road, Los Angeles County, CA Architectural Historian CLIENT: Alain Yotnegparian Architects Prepared a historic resource evaluation for a property located in a historic district to assess the impact of an addition to the house. Historic Context Statement for the City of Monrovia, Los Angeles County, CA Architectural Historian CLIENT: City of Monrovia Assisted in the development a citywide historic context statement for Monrovia, including recommendations for historic districts. Contexts and themes were identified and defined based on a windshield survey of the city, archival research using primary and secondary resources, and review of previous evaluations. Historic Resources Survey of the Works of Architect Loch Crane, San Diego County, CA Architectural Historian CLIENT: HELIX Environmental Planning Researched and surveyed the work of San Diego architect Loch Crane. Developed a context based on survey findings, archival research of reviews of previous evaluations. The report included Department of Parks and Recreation (DPR) primary forms for 30 identified properties. Cultural Resources Evaluation Report Clairemont High School Whole Site Modernization, San Diego County, CA Architectural Historian CLIENT: BRG Consulting Prepared a historic evaluation report for eight buildings on the Clairemont High School campus in advance of modernization projects. Efforts included a site visit, photographic documentation of the buildings, and archival research. The evaluation included preparation of California DPR forms Historic Resource Evaluation Memo for 110 and 132 East Crowther Avenue, Orange County, CA Architectural Historian CLIENT: HELIX Environmental Planning Prepared an evaluation for two industrial properties located in the City of Placentia. Reviewed previous surveys, assessor’s building records, and chain of ownership for the properties. Conducted an intensive pedestrian survey of the properties and a reconnaissance survey of the neighborhood to consider a potential historic district. The evaluation was conducted to consider the eligibility of the properties under NRHP, CRHR, and City of Placentia eligibility criteria and in compliance with CEQA. Historic Resource Evaluation Memo for 1019 North Orange Grove Avenue, Los Ange les County, CA Architectural Historian CLIENT: 1019 North Orange Grove, LLC Prepared an evaluation for a property located in the City of West Hollywood. Reviewed previous surveys, assessor’s building records, and chain of ownership for the properties. Conducted an intensive pedestrian survey of the property and a reconnaissance survey of the neighborhood to consider a potential historic district. The evaluation was conducted to consider the eligibility of the properties under NRHP, CRHR, and City of West Hollywood eligibility criteria and in compliance with CEQA August 9, 2018 Efrain Ferrer Page 35 of 37 Architectural History Technical Report for Muroc Joint United School District Facilities at Edwards Air Force Base, Kern County, CA Architectural Historian CLIENT: Muroc Joint Unified School District (MJUSD) Prepared a technical report as part of a cultural resources study of five MJUSD campuses located on Edwards Air Force Base, based on an intensive-level pedestrian survey of the five schools and archival research. Included in the work effect was preparation of Department of Parks and Recreation (DPR) district and primary forms. The report was prepared in compliance with Section 106 of the National Historic Preservation Act (NHPA), the National Environmental Policy Act (NEPA), and the California Environmental Quality Act (CEQA). On-Call Preservation Services for County of Los Angeles, Los Angeles County, CA Architectural Historian CLIENT: County of Los Angeles Currently working with the County under its new Preservation Ordinance to review of proposed projects at specific residential sites. Work is performed to ensure compliance with the Secretary of the Interior’s Standards for property owners to determine eligibility for Mills Act tax credits. Several of the properties reviewed are in the County’s first designated historic district, the View Park Historic District. Historic Context Report, San Bernardino County, CA Historian CLIENT: BNSF Railway Company At a previous firm, wrote detailed history and significance of railroad construction. State Inventory and Evaluation Forms, Los Angeles County, CA Architectural Historian CLIENT: City of Monrovia At a previous firm, wrote building descriptions for 150 domestic and commercial buildings. State Inventory and Evaluation Forms, Los Angeles Coun ty, CA Architectural Historian CLIENT: City of South Pasadena At a previous firm, conducted field research, took photographs and wrote descriptions for 300 properties. Historic American Building Survey, Los Angeles County, CA Architectural Historian CLIENT: Walt Disney Company Research and wrote descriptive section of submission for Grand Central Terminal building. State Inventory and Evaluation Forms, Riverside County, CA Architectural Historian CLIENT: City of Riverside Wrote building descriptions and significance for over 1,500 domestic and commercial buildings. State Inventory and Evaluation Forms, Los Angeles County, CA Architectural Historian CLIENT: City of Pasadena Conducted field research and wrote building descriptions for 175 domestic and commercial buildings. Researched history and significance of 100 buildings. Historic American Building Survey, Kelly Air Force Base, Bexar County, TX Architectural Historian CLIENT: U.S. Air Force Conducted field research and completed HABS Level II documentaries for four buildings scheduled for re- use. August 9, 2018 Efrain Ferrer Page 36 of 37 Historic Building Inventory and Evaluation for 18 Radar Sites, AK Historian CLIENT: U.S. Air Force Evaluated findings from field research to determine Cold War significance of buildings and structures . Prepared report outlining findings and provided descriptions of both contributing and non -contributing buildings. Cultural Resources Management Plan, Lajes Air Force Base, Azores, Portugal Historian CLIENT: U.S. Air Force Prepared cultural resources plan to assist in management decision of the Portuguese-owned, United States-operated Air Force Base. National Register Nomination, Lexington Blue Grass Army Depot, Madison County, KY Architectural Historian CLIENT: U.S. Army Prepared ten individual forms to accompany multiple property nomination. Historic Building Inventory and Evaluation, Air Force Plant 42, Los Angeles County, CA Historian CLIENT: U.S. Air Force Conducted an evaluation of World War II and Cold War facilities. New York State Historic Building Inventory, Madison County, NY Architectural Historian CLIENT: City of Morrisville Conducted historic research of ten Main Street buildings. Prepared inventory forms for submission to state historic preservation office. National Register Nomination, Lincoln Park, Cook County, IL Intern CLIENT: Chicago Park District Research history of major city park. Organized data gathered from volunteer surveys to determine possible significance. Wrote description section of nomination as part of multiple property nomination. Historic Preservation Teaching Assistance, Tompkins County, NY Teaching Assistant CLIENT: Cornell University Provided lecture assistance and reviewed student work for Building Materials Conservation and Twentieth Century Building Materials courses. Conducted lectures and provided student assistance for Preservation Workshop. Historic American Building Survey, Ontario County, NY Architectural Historian CLIENT: Cornell University Conducted historic research and completed measured drawing of one evaluation of a deteriorated Italianate Style house. Completed drawings were submitted to HABS. Historic Structures Report for Heacock House, Mahoning County, OH Architectural Historian CLIENT: Cornell University Responsible for researching the complete history and physical evaluation of a structure. Provided recommendations and cost estimates for three possible restoration plans. August 9, 2018 Efrain Ferrer Page 37 of 37 City of Downey | Initial Study for: Rives Mansion Conversion B-1 Trinity Consultants APPENDIX B: AIR QUALITY AND GHG EMISSIONS REPORT 20 Corporate Park | Suite 200 | Irvine, CA 92606 P (949) 567-9880 | F (949) 567-9894 MEMORANDUM To: Guillermo Arreola, Principal Planner, City of Downey cc: Tiffany Wang, Trinity Consultants From: Valerie Rosenkrantz, Trinity Consultants Date: April 18, 2019 RE: Historic Rives Mansion Conversion Project Air Quality and Greenhouse Gas Technical Report Trinity Consultants, Inc. has prepared the Air Quality and Greenhouse Gas emissions and California Environmental Quality Act (CEQA) technical report for the historic Rives Mansion Conversion Project. The City of Downey received an application for a proposed conversion of the historic Rives Mansion into an office space (the proposed Rives Mansion Conversion Project or proposed Project). The proposed Project involves the remodel of an existing historic residential building, carriage house and water tower to create office space. It also includes the construction of a new retail building. The Rives Mansion is located at 10921 Paramount Boulevard on a 36,750-square-foot (sf) lot in Downey, CA. The property is bounded by Paramount Boulevard to the east, 3rd Street to the south, 7955 3rd Street to the west and an alley separating 3rd and 4th Street to the north. This technical analysis includes the most recent CEQA Guidelines checklist questions and responses as well as follows guidance available from the South Coast Air Quality Management District. After a thorough review of all emission sources and responses to all CEQA Guidelines checklist questions, all findings would be less than significant and, therefore, no further action is required. Rives Mansion Air Quality and Greenhouse Gas Technical Report – Page 2 April 18, 2019 Potentially Significant Impact Less than Significant with Mitigation Less than Significant Impact No Impact III. Air Quality Would the project: a) Conflict with or obstruct implementation of the applicable air quality plan? ☐ ☐ ☒ ☐ b) Result in cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable federal or state ambient air quality standard? ☐ ☐ ☒ ☐ c) Expose sensitive receptors to substantial pollutant concentrations? ☐ ☐ ☒ ☐ d) Result in other emissions (such as those leading to odors) adversely affecting a substantial number of people? ☐ ☐ ☒ ☐ VIII. Greenhouse Gas Emissions Would the project: a) Generate greenhouse gas emissions, either directly or indirectly, that may have a significant impact on the environment? ☐ ☐ ☒ ☐ b) Conflict with an applicable plan, policy, or regulation adopted for the purpose of reducing the emissions of greenhouse gases? ☐ ☐ ☒ ☐ METHODOLOGY Thresholds of Significance The significance of impacts from construction, operational non-permitted equipment and activities, and operational permitted equipment and activities are evaluated separately. A project would be determined to have a significant impact on air quality if the emissions sum for any criterial pollutant exceeds its Rives Mansion Air Quality and Greenhouse Gas Technical Report – Page 3 April 18, 2019 respective threshold of significance. The South Coast Air Quality Management District (SCAQMD) thresholds of significance for criteria pollutant emissions are presented below in Table 1. Table 1 – SCAQMD Air Quality Significance Thresholds Mass Daily Thresholds a Pollutant Construction b Operation c NOx 100 lbs/day 55 lbs/day VOC 75 lbs/day 55 lbs/day PM10 150 lbs/day 150 lbs/day PM2.5 55 lbs/day 55 lbs/day SOx 150 lbs/day 150 lbs/day CO 550 lbs/day 550 lbs/day Lead 3 lbs/day 3 lbs/day Toxic Air Contaminants (TACs), Odor, and GHG Thresholds TACs (including carcinogens and non-carcinogens) Maximum Incremental Cancer Risk ≥ 10 in 1 million Cancer Burden > 0.5 excess cancer cases (in areas ≥ 1 in 1 million) Chronic & Acute Hazard Index ≥ 1.0 (project increment) Odor Project creates an odor nuisance pursuant to SCAQMD Rule 402 GHG 10,000 MT/yr CO2eq for industrial facilities Ambient Air Quality Standards for Criteria Pollutants d NO2 1-hour average annual arithmetic mean SCAQMD is in attainment; project is significant if it causes or contributes to an exceedance of the following attainment standards: 0.18 ppm (state) 0.03 ppm (state) and 0.0534 ppm (federal) PM10 24-hour average annual average 10.4 µg/m3 (construction)e & 2.5 µg/m3 (operation) 1.0 µg/m3 PM2.5 24-hour average 10.4 µg/m3 (construction)e & 2.5 µg/m3 (operation) SO2 1-hour average 24-hour average 0.25 ppm (state) & 0.075 ppm (federal – 99th percentile) 0.04 ppm (state) Sulfate 24-hour average 25 µg/m3 (state) CO 1-hour average 8-hour average SCAQMD is in attainment; project is significant if it causes or contributes to an exceedance of the following attainment standards: 20 ppm (state) and 35 ppm (federal) 9.0 ppm (state/federal) Lead 30-day Average Rolling 3-month average 1.5 µg/m3 (state) 0.15 µg/m3 (federal) at or below 0.110 µg/m3 through December 31, 2016 and at or below 0.100 µg/m3 on and after January 1, 2017 (SCAQMD Rule 1420.1) a Source: SCAQMD CEQA Handbook (SCAQMD, 1993), Revision: March 2015 b Construction thresholds apply to both the South Coast Air Basin and Coachella Valley (Salton Sea and Mojave Desert Air Basins). c For Coachella Valley, the mass daily thresholds for operation are the same as the construction thresholds. d Ambient air quality thresholds for criteria pollutants based on SCAQMD Rule 1303, Table A-2 unless otherwise stated. e Ambient air quality threshold based on SCAQMD Rule 403. KEY: lbs/day = pounds per day ppm = parts per million µg/m3 = microgram per cubic meter ≥ = greater than or equal to MT/yr CO2eq = metric tons per year of CO2 equivalents > = greater than Rives Mansion Air Quality and Greenhouse Gas Technical Report – Page 4 April 18, 2019 Construction Source Emissions Construction of the proposed Project would conservatively begin in September 2019 and be completed in approximately five months. This analysis uses California Emissions Estimator Model (CalEEMod) version 2016.3.2 to estimate the construction emissions for the Project (California Air Pollution Control Officers Association, (CAPCOA), 2017). The Project was split into two sections: new construction of the café building and the renovation of the three existing buildings into office buildings. Model defaults for 1,200 square feet of a High Turnover (Sit Down Restaurant) were used for the new café building and are summarized in Table 2. Model defaults for a General Office Building were used for the renovation of the three existing buildings. No external construction is expected from the renovation; therefore, no construction off-road equipment is expected. The only expected construction emissions for the renovation are from worker and vendor trips to the site. Table 3 presents a summary of construction emissions for both the new café building and the renovation of the three existing buildings. Table 2 – CalEEMod Construction Emissions Assumptions CalEEMod Defaults for High Turnover (Sit Down Restaurant) 1,200 square feet Equipment Number HP Hours/Day Site Preparation Graders 1 187 8 Tractor/Loader/ Backhoes 1 97 8 Grading Concrete/ Industrial Saws 1 81 8 Rubber Tired Dozer 1 247 1 Tractor/Loader/Backhoe 2 97 6 Building Construction Cranes 1 231 4 Forklifts 2 89 6 Tractor/Loader/ Backhoe 2 97 8 Architectural Coating Air Compressors 1 78 6 Paving Cement and Mortar Mixers 4 9 6 Pavers 1 130 7 Rollers 1 80 7 Tractor/Loader/ Backhoe 1 97 7 Defaults taken from CalEEMod 2016.3.2 for a High Turnover (Sit Down Restaurant) Rives Mansion Air Quality and Greenhouse Gas Technical Report – Page 5 April 18, 2019 Table 3 – Maximum Construction Emissions Criteria Pollutants (lb/day) Greenhouse Gas (MT/year) ROG NOx CO SO2 PM10 PM2.5 CO2 CH4 N2O CO2e New Café 2.48 9.83 8.17 0.01 0.94 0.70 45.03 0.01 0.00 45.38 Renovations 13.96 0.14 2.99 0.001 0.07 0.02 3.077 0.00 0.00 3.08 Total 16.43 9.97 11.17 0.014 1.02 0.73 48.11 0.01 0.00 48.46 SCQAMD Thresholds 75 100 550 150 150 55 NA NA NA 10,000 Exceed Thresholds? (Yes/No) No No No No No No No No No No Source: Trinity Consultants, 2019 Operational Source Emissions Operation of the proposed Project is assumed to begin after construction ends in February, 2020. This analysis uses CalEEMod 2016.3.2 to estimate emissions from both the new café building and the renovated office buildings. CalEEMod defaults for a High Turnover (Sit Down Restaurant) and for General Office Building were used. Table 4 presents a summary of operational emissions prior to the application of CalEEMod’s mobile mitigation measures, and Table 5 reflects the inclusion of those measures. These CalEEMod mobile mitigation measures technically reflect the existing urban design features of the Project area and include: Improve Walkability Design Improve Destination Accessibility Increase Transit Accessibility Improve Pedestrian Network The proposed Project is not expected to exceed any SCAQMD thresholds for operational emissions with and without the existing urban design parameters. Because these urban design parameters reflect existing actual conditions and the proposed Project will make no additional physical modifications off-site, there are no CEQA mitigation measures as part of this proposed Project. Table 4 – Maximum Unmitigated Operational Emissions Criteria Pollutants (lb/day) Greenhouse Gas (MT/year) ROG NOx CO SO2 PM10 PM2.5 CO2 CH4 N2O CO2e New Café 0.32 1.26 2.73 0.01 0.56 0.16 140.1 0.19 0.002 145.1 Renovations 0.34 0.83 2.30 0.01 0.58 0.16 136.3 0.13 0.001 140.1 Total 0.66 2.09 5.02 0.02 1.14 0.32 276.4 0.33 0.002 285.2 SCAQMD Thresholds 55 55 550 150 150 55 NA NA NA 3,000 Exceed Thresholds (Yes/No) No No No No No No No No No No Source: Trinity Consultants, 2019 Table 5 – Maximum Mitigated Operational Emissions Criteria Pollutants (lb/day) Greenhouse Gas (MT/year) ROG NOx CO SO2 PM10 PM2.5 CO2 CH4 N2O CO2e New Café 0.28 0.93 1.49 0.004 0.20 0.06 80.0 0.19 0.00 84.9 Renovations 0.29 0.49 1.03 0.003 0.20 0.06 79.9 0.13 0.001 83.61 Total 0.58 1.43 2.62 0.007 0.40 0.12 159.9 0.32 0.002 168.5 SCAQMD Thresholds 55 55 550 150 150 55 NA NA NA 3,000 Rives Mansion Air Quality and Greenhouse Gas Technical Report – Page 6 April 18, 2019 Exceed Thresholds (Yes/No) No No No No No No No No No No Source: Trinity Consultants, 2019 Operational Impacts To Localized Ambient Air Quality Localized Significance Thresholds (LSTs) developed by SCAQMD to readily determine if the daily emissions for proposed construction or operational activities could result in significant localized air quality impacts (SCAQMD, 2008). LSTs represent the maximum emissions from a project that are not expected to cause or contribute to an exceedance of the most stringent applicable federal or state ambient air quality standard, and are developed based on the ambient concentrations of that pollutant for each source receptor area and distance to the nearest sensitive receptor. For PM10, LSTs were derived based on requirements in SCAQMD Rule 403 – Fugitive Dust. LSTs are only applicable to NOx, CO, PM10 and PM2.5. LSTs apply to projects that must undergo an environmental analysis pursuant to CEQA and are five acres or less. The proposed Project impact area is less than one acre. Table 6 summarizes the LST allowable emissions for a one acre project in Area 3, Southwest Coastal LA County, at 25 meters from the site boundary. Table 6 provides the comparison of the proposed Project’s maximum daily emissions with applicable LST thresholds. Based on this review and the fact that the nearest residential receptor is approximately within 25 meters to the north, the proposed Project is not expected to cause or contribute to an exceedance of the most stringent applicable federal or state ambient air quality standard. Table 6 - Compare Project with LST Thresholds at 25 Meters for Southeast LA County Pounds per Day NOx CO PM10 PM2.5 Operations Comparison LST Operations Threshold at 25 meters 80 571 1 1 Project Operations Emissions (Table 5) 1.43 2.62 0.40 0.12 Exceed LST Threshold? No No No No Construction Comparison 1 LST Construction Threshold at 25 meters NA NA 4 3 Project Construction Emissions (Table 3) NA NA 1.02 0.73 Exceed LST Threshold? -- -- No No Note: (1) Construction LST only evaluates PM10 and PM2.5. Source: SCAQMD 2008, Appendix C – Mass Look up Tables CO Hot Spots The potential for high concentrations of CO emissions associated with truck and vehicle traffic was considered and evaluated in accordance with the requirements of the SCAQMD CEQA Air Quality Handbook (SCAQMD, 1993). The Handbook indicates that any project that could negatively impact levels of service at local intersections may create a CO hot spot and should be evaluated. The additional traffic would generate no more than 14 additional truck trips per day and 152 gasoline passenger trips on a peak day at full operations of the proposed Project. These trips, spread out over 24 hours, could conservatively result in 1 additional truck trip and 7 additional vehicle trips per peak hour. This level of additional truck and vehicle trip activity would have no measurable change on peak-hour intersection level-of-service. Therefore, potential impacts on CO emissions due to additional truck and Rives Mansion Air Quality and Greenhouse Gas Technical Report – Page 7 April 18, 2019 vehicle traffic at area intersections near the proposed Project would not adversely affect peak hour intersection level-of-service. Cumulative Impacts The SCAQMD guidance on addressing cumulative impacts for air quality is as follows: “As Lead Agency, the SCAQMD uses the same significance thresholds for project specific and cumulative impacts for all environmental topics analyzed in an Environmental Assessment or EIR.” “Projects that exceed the project-specific significance thresholds are considered by the SCAQMD to be cumulatively considerable. This is the reason project-specific and cumulative significance thresholds are the same. Conversely, projects that do not exceed the project-specific thresholds are generally not considered to be cumulatively significant.” Appendix D (Cumulative Impact Analysis Requirements Pursuant to CEQA) of the SCAQMD Cumulative Impacts Working Group 2003 White Paper summarizes the SCAQMD approach to the preparation of cumulative air quality analysis (SCAQMD, 2003). This approach was upheld by the Court in Citizens for Responsible Equitable Environmental Development v. City of Chula Vista (2011) 197 Cal. App. 4th 327, 334. The Court determined that where it can be found that a project did not exceed the SCAQMD’s established air quality significance thresholds, the City of Chula Vista properly concluded that the project would not cause a significant environmental effect, nor result in a cumulatively considerable increase in these pollutants. The court found this determination to be consistent with CEQA Guidelines §15064.7, stating, “The lead agency may rely on a threshold of significance standard to determine whether a project will cause a significant environmental effect.” The court found that, “Although the project will contribute additional air pollutants to an existing nonattainment area, these increases are below the significance criteria…” “Thus, we conclude that no fair argument exists that the project will cause a significant unavoidable cumulative contribution to an air quality impact.” As in Chula Vista, here the SCAQMD has demonstrated, when using accurate and appropriate data and assumptions, that the Project would not exceed the established SCAQMD significance thresholds. See also, Rialto Citizens for Responsible Growth v. City of Rialto (2012) 208 Cal. App. 4th 899. Again, the court upheld the SCAQMD’s approach to utilizing the established air quality significance thresholds to determine whether the impacts of a project would be cumulatively considerable. Toxic Air Contaminants The proposed Project includes three office buildings and a café. These buildings are not expected to release any toxic air contaminants. The current usage of the Project site expects an average of 3 truck trips per day. An average of 14 truck trips per day is expected from the proposed Project, which is an increase in 11 truck trips per day. 3. AIR QUALITY CHECKLIST QUESTIONS a) Less than Significant Impact. As discussed in section (b) below, the proposed Project would not exceed SCAQMD’s thresholds for criteria pollutants from construction or operations. In addition, operations-related traffic would not result in CO hotspots where ambient air quality standards would be exceeded near roadways. As discussed in section (c) below, the proposed Project would not result in substantial emissions of toxic air contaminants (TACs) and would not exceed SCAQMD’s LST thresholds at 25 meters; therefore, nearby receptors would not be exposed to substantial pollutant concentrations. Rives Mansion Air Quality and Greenhouse Gas Technical Report – Page 8 April 18, 2019 As discussed in section (d) below, there are no odors associated with the proposed Project and the proposed Project will not adversely affect a substantial number of people. Since the proposed Project will have a less than significant impact on the above factors, the proposed Project would have a less than significant impact on implementation of any applicable air quality plan. b) Less than Significant Impact. This evaluation is based on estimated emissions of criteria air pollutants modeled using CalEEMod 2016.3.2 and EMFAC2017 (and described above under Methodology, Construction Emissions and Operational Emissions). The SCAQMD has designated significant emission levels for criteria pollutants to evaluate regional air quality impact significance under CEQA. These emission levels are presented above in Table 1, SCAQMD Air Quality Significance Thresholds. Projects that exceed these emission thresholds are considered to have a significant air quality impact. This Project would result in temporary emissions of air pollutants during construction and operation. Air pollutant emissions during construction are due to the use of construction equipment. CalEEMod 2016.3.2 was used to estimate construction emissions. The maximum daily emissions for each criteria pollutant are listed in Table 3, Maximum Construction Emissions. According to the results in Table 3, the potential maximum daily construction emissions are well below the SCAQMD CEQA thresholds. Operation of the office buildings and café would result in an increase of air pollutants due to office and café activities as well as an increase in consumer traffic. Operational emission were estimated using CalEEMod 2016.3.2. Table 4, Maximum Operation Emissions shows the maximum operational emissions of criteria pollutants. According to the results in Table 4, the potential maximum daily operational emissions are well below the SCAQMD CEQA thresholds. An evaluation of LSTs developed by the SCAQMD to determine if the daily emissions for proposed construction or operational activities could result in significant localized air quality impacts are presented above in Table 6, Compare Project with LST Thresholds at 25 Meters for Southwest Coastal LA County. According to the results in Table 6, the potential maximum daily operational emissions are well below the SCAQMD LST thresholds for 25 meters. As discussed above, air quality impacts from the construction and operational activities associated with implementing the proposed Project would result in less than significant air quality impacts. The analyses demonstrate that the SCAQMD’s significance thresholds, which also serve as the cumulative significance threshold for construction and operation, would not be exceeded for any pollutant. In addition, CEQA Guidelines §15064 (h)(4) states, “The mere existence of significant cumulative impacts caused by other projects alone shall not constitute substantial evidence that the proposed project’s incremental effects are cumulatively considerable.” For this reason, air quality impacts are not considered to be cumulatively considerable pursuant to CEQA Guidelines §15064 (h)(1) and therefore, no significant adverse cumulative construction and operational air quality impacts are expected to occur. In sum, the proposed Project would not exceed SCAQMD thresholds for construction and operation emissions. For these reasons, the proposed Project would have a less than significant impact on air quality standards and therefore would not result in a cumulative considerable air quality impact. No mitigation measures would be required. c) Less Than Significant Impact. The location of nearby non-residential sensitive receptors is detailed in Table 7. Rives Mansion Air Quality and Greenhouse Gas Technical Report – Page 9 April 18, 2019 Table 7 - Location of Non-Residential Sensitive Receptors Receptor Name Address Distance (miles) Rio Hondo Elementary School 7731 Muller St, Downey 0.41 N Montessori Children’s Academy 7515 Firestone Blvd, Downey 0.51 NW Williams Elementary School 7530 Arnett St, Downey 0.60 SW Warren High School 8141 De Palma St, Downey 0.60 S Downey High School 11040 Brookshire Ave, Downey 0.63 SE Kirkwood Christian Schools 10822 Brookshire Ave, Downey 0.64 SE PIH Health Hospital 11500 Brookshire Ave, Downey 0.78 S Griffiths Middle School 9633 Tweedy Ln, Downey 0.99 N Maude Price Elementary School 9525 Tweedy Ln, Downey 1.14 N Stauffer Middle School 11985 Old River School Rd, Downey 1.16 SW Old River Elementary School 11995 Old River School Rd, Downey 1.19 SW Alameda Elementary School 8613 Alameda St, Downey 1.26 S St. Raymond School 12320 Paramount Blvd, Downey 1.35 S Gallatin Elementary School 9513 Brookshire Ave, Downey 1.33 NE Rio San Gabriel Elementary School 9338 Gotham St, Downey 1.46 E Doty Middle School 10301 Woodruff Ave, Downey 1.40 E Suva Elementary School 6740 Suva St, Bell Gardens 1.52 NW Imperial Elementary School 8133 Imperial Hwy, Downey 1.56 S Garfield Elementary School 7425 Garfield Ave, Bell Gardens 1.58 NW Sussman Middle School 12500 Birchdale Ave, Downey 1.62 S Suva Intermediate School 6660 Suva St, Bell Gardens 1.62 NW Kaiser Permanente 9333 Imperial Hwy, Downey 1.77 S Unsworth Elementary School 9001 Lindsey Ave, Downey 1.86 NE A L Gauldin Elementary School 9724 Spry St, Downey 1.94 SE Source: Google Earth Pro version 7.1.8.3036 The nearest residents are immediately adjacent to the proposed Project location. The nearest school receptor is 0.41 miles north of the proposed Project. The proposed Project is expected to have an average of 14 truck trips per day and a maximum of 17 truck trips per day, which is substantially less than the 100 truck trips per day SCAQMD’s typically applies as the threshold for determining that a health risk assessment is required. The Project construction and operations emissions presented above in Tables 3, 4 and 5 would be less than the SCAQMD’s significance thresholds outlined in Table 1. For these reasons, the proposed Project would not expose sensitive receptors to substantial pollutant concentrations. The proposed Project would therefore have less than significant impacts on sensitive receptors. No mitigation measures would be required. d) Less than Significant Impact. The proposed Project would include three office buildings and one café. There are no odors associated with these buildings. The construction and operation of the proposed Project is not expected to result in a substantial increase in odors, and therefore the potential for odor impacts would be less than significant. GREENHOUSE GASES AND CLIMATE CHANGE INTRODUCTION Global climate change refers to change in average meteorological conditions on the earth with respect to temperature, precipitation, and storms, lasting for decades or longer. Greenhouse gases (GHGs) are present in the atmosphere naturally, released by natural sources, or formed from secondary reactions Rives Mansion Air Quality and Greenhouse Gas Technical Report – Page 10 April 18, 2019 taking place in the atmosphere. They include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O) and ozone (O3). In the last 200 years, substantial quantities of GHGs have been released into the atmosphere, primarily from fossil fuel combustion. These human-induced emissions are increasing GHG concentrations in the atmosphere, therefore enhancing the natural greenhouse effect. The GHGs resulting from human activity are believed to be causing global climate change. While human-made GHGs include CO2, CH4, and N2O, some (like chlorofluorocarbons [CFCs]) are completely new to the atmosphere. GHGs vary considerably in terms of Global Warming Potential (GWP), the comparative ability of each GHG to trap heat in the atmosphere. The GWP is based on several factors, including the relative effectiveness of a gas to absorb infrared radiation and the length of time that the gas remains in the atmosphere (“atmospheric lifetime”). The GWP of each gas is measured relative to CO2, the most abundant GHG. The definition of GWP for a particular GHG is the ratio of heat trapped by one unit mass of the GHG to the ratio of heat trapped by one unit mass of CO2 over a specified time period. GHG emissions are typically measured in terms of pounds or tons of “CO2 equivalents” (CO2e). Worldwide emissions of GHGs in 2008 were 30.1 billion metric tons of CO2e and have increased considerably since that time (United Nations, 2011). It is important to note that the global emissions inventory data are not all from the same year and may vary depending on the source of the data (U.S. EPA, 2016). Emissions from the top five emitting countries and the European Union accounted for approximately 55% of total global GHG emissions. The United States was the number two producer of GHG emissions. The primary GHG emitted by human activities in the United States was CO2, representing approximately 84% of total GHG emissions (U.S. EPA, 2016). On September 27, 2006, Assembly Bill 32 (AB32), the California Global Warming Solutions Act of 2006 (the Act) was enacted by the State of California. The legislature stated, “Global warming poses a serious threat to the economic well-being, public health, natural resources, and the environment of California.” The Act caps California’s GHG emissions at 1990 levels by 2020. The Act defines GHG emissions as all of the following gases: CO2, CH4, N2O , hydrofluorocarbons, perfluorocarbons and sulfur hexafluoride. This agreement represents the first enforceable statewide program in the U.S. to cap all GHG emissions from major industries that includes penalties for non-compliance. While acknowledging that national and international actions will be necessary to fully address the issue of global warming, AB32 lays out a program to inventory and reduce GHG emissions in California and from power generation facilities located outside the state that serve California residents and businesses. AB32 charges California Air Resources Board (CARB) with responsibility to monitor and regulate sources of GHG emissions in order to reduce those emissions. CARB has adopted a list of discrete early action measures that can be implemented to reduce GHG emissions. CARB has defined the 1990 baseline emissions for California and has adopted that baseline as the 2020 statewide emissions cap. CARB is conducting rulemaking for reducing GHG emissions to achieve the emissions cap by 2020. In designing emission reduction measures, CARB must aim to minimize costs, maximize benefits, improve and modernize California’s energy infrastructure, maintain electric system reliability, maximize additional environmental and economic co-benefits for California, and complement the state’s efforts to improve air quality. 7. GREENHOUSE GAS EMISSIONS CHECKLIST QUESTIONS a) Less than Significant Impact. The SCAQMD Governing Board adopted an interim GHG significance threshold for projects where the SCAQMD is the lead agency in December of 2008. This interim established a threshold for 10,000 metric tons (MT) CO2e per year for industrial projects. SCAQMD has also proposed a screening-level threshold of 3,000 MT CO2e per year for commercial and residential projects. Rives Mansion Air Quality and Greenhouse Gas Technical Report – Page 11 April 18, 2019 The expected GHG emissions from construction are listed in Table 3, Maximum Construction Emissions. The maximum GHG emissions from operation are listed in Table 4, Maximum Operational. According to the results in Tables 3 and 4, the maximum construction and operational GHG emissions are well below the proposed SCAQMD threshold of 3,000 MT per year for commercial projects and the SCAQMD threshold of 10,000 MT per year for industrial projects. For these reasons, the proposed Project would have a less than significant GHG emission impact on the environment. No mitigation measures would be required. b) Less than Significant Impact. This Project would generate a very small amount of new GHGs and would be well below the SCAQMD thresholds for a commercial project. Further, the proposed Project would reduce regional vehicle miles travelled (VMT) over the existing residential uses (described further in Section XVIII, Transportation). For these reasons, the proposed Project would not conflict with any plan, policy, or regulation adopted with the goal of reducing GHG emissions. References CARB. 2018. Mobile Source Emission Inventory – Categories – EMFAC 2017, Updated March 2018. https://www.arb.ca.gov/msei/categories.htm CAPCOA. 2017. California Emissions Estimator Model tm (CalEEMod), version 2016.3.2, released November 2017. Citizens for Responsible Equitable Environmental Development v. City of Chula Vista (2011) 197 Cal. App. 4th 327, 334 SCAQMD CEQA Significance Threshold Working Group. 2010. Stakeholder Working Group Meeting #15, September 28, 2010. https://planning.lacity.org/eir/8150Sunset/References/4.E.%20Greenhouse%20Gas%20Emissions/GHG.39_SCAQMD%20GHG%20Meeting%2015.pdf SCAQMD. 2008. CEQA GHG Significance Thresholds – Attachment E, released October 2008. http://www.aqmd.gov/docs/default-source/ceqa/handbook/greenhouse-gases-(ghg)-ceqa-significance-thresholds/ghgattachmente.pdf?sfvrsn=2 SCAQMD. 2006-2008. CEQA Localized Significance Thresholds Appendix C – Mass Rate LST Look-up Tables, revised October 2009. http://www.aqmd.gov/docs/default-source/ceqa/handbook/localized-significance-thresholds/appendix-c-mass-rate-lst-look-up-tables.pdf?sfvrsn=2 SCAQMD. 2003. CEQA Localized Significance Thresholds, released October 2003. http://www.aqmd.gov/home/rules-compliance/ceqa/air-quality-analysis-handbook/localized-significance-thresholds SCAQMD. 2003. Cumulative Impacts Working Group White Paper – Appendix D Cumulative Impact Analysis Requirements Pursuant to CEQA, released September 2003. https://www.aqmd.gov/docs/default-source/Agendas/Environmental-Justice/cumulative-impacts-working-group/cumulative-impacts-white-paper-appendix.pdf?sfvrsn=4 SCAQMD. 1993. CEQA Handbook, revised March 2015. http://www.aqmd.gov/docs/default-source/ceqa/handbook/scaqmd-air-quality-significance-thresholds.pdf?sfvrsn=2 20 Corporate Park | Suite 200 | Irvine, CA 92606 P (949) 567-9880 | F (949) 567-9894 RIVES MANSION EMISSION SUMMARY (Excel Workbook pages) Annual Project Emissions ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eConstruction0.0779 0.43054 0.3399 0.00053 0.02984 0.02513 48.1075 0.01413 0.0000 48.4596Operational0.1011 0.3144 0.7227 0.00221 0.1626 0.0461 276.396 0.325 0.00215 285.163 Max Daily Project Emissions ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eConstruction16.4303 9.9651 11.1669 0.01439 1.0182 0.7253 1381.61 0.36149 0.0000 1387.35Operational0.6645 2.0873 5.0225 0.01527 1.1408 0.3209 1644.83 0.0914 0.0021 1647.72 tons/year MT/year lbs/day Downey Rives Mansion Construction Emissions SummaryExisting Buildings - Renovations ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eAnnual Emissions (tons/year for criteria pollutants; MT/year for GHGs)0.0361 0.0047 0.0108 0.0000 0.0026 0.0007 3.0774 0.0001 0.0000 3.0807 ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eSummer (lbs/day)13.9611 0.1378 0.3200 0.0010 0.0748 0.0209 100.6586 0.0043 0.0000 100.7658Winter (lbs/day)13.9633 0.1403 2.9930 0.0009 0.0748 0.0209 95.6556 0.0043 0.0000 95.7621 Max (lbs/day)13.9633 0.1403 2.9930 0.0010 0.0748 0.0209 100.6586 0.0043 0.0000 100.7658New Building - Café - Unmitigated ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eMax Annual Emissions (tons/year for criteria pollutants; MT/year for GHGs)0.0418 0.4258 0.3291 0.0005 0.0278 0.0247 45.0301 0.0140 0.0000 45.3789 ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eSummer (lbs/day)2.4670 9.8244 8.1739 0.0134 1.4026 0.9568 1280.9523 0.3572 0.0000 1286.5841Winter (lbs/day)2.4670 9.8248 8.1342 0.0133 1.4026 0.9568 1273.8701 0.3572 0.0000 1279.4960 Max (lbs/day)2.4670 9.8248 8.1739 0.0134 1.4026 0.9568 1280.9523 0.3572 0.0000 1286.5841New Building - Café - Mitigated ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eMax Annual Emissions (tons/year for criteria pollutants; MT/year for GHGs)0.0418 0.4258 0.3291 0.0005 0.0272 0.0244 45.0301 0.0140 0.0000 45.3789 ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eSummer (lbs/day)2.4670 9.8244 8.1739 0.0134 0.9434 0.7044 1280.9523 0.3572 0.0000 1286.5841Winter (lbs/day)2.4670 9.8248 8.1342 0.0133 0.9434 0.7044 1273.8701 0.3572 0.0000 1279.4960 Max (lbs/day)2.4670 9.8248 8.1739 0.0134 0.9434 0.7044 1280.9523 0.3572 0.0000 1286.5841 Total Project Construction Emissions ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2e(tons/year for criteria pollutants; MT/year for GHGs)0.0779 0.4305 0.3399 0.0005 0.0298 0.0251 48.1075 0.0141 0.0000 48.4596lb/day 16.4303 9.9651 11.1669 0.0144 1.0182 0.7253 1381.6109 0.3615 0.0000 1387.3499 Downey Rives Mansion Unmitigated Operational Emissions SummaryExisting Buildings - Renovations ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eAnnual Emissions (tons/year for criteria pollutants; MT/year for GHGs)0.0534 0.1181 0.3075 0.0010 0.0783 0.0219 136.2718 0.1342 0.0014 140.0568 ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eSummer (lbs/day)0.3400 0.8105 2.2972 0.0001 0.5764 0.1604 774.6525 0.0413 0.0005 775.8235Winter (lbs/day)0.3354 0.8320 2.1887 0.0071 0.5765 0.1604 738.0988 0.0411 0.0005 739.2653 Max (lbs/day)0.3400 0.8320 2.2972 0.0071 0.5765 0.1604 774.6525 0.0413 0.0005 775.8235New Building - Café ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eAnnual Emissions (tons/year for criteria pollutants; MT/year for GHGs)0.0477 0.1963 0.4152 0.0012 0.0843 0.0242 140.1244 0.1908 0.0007 145.1061 ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eSummer (lbs/day)0.3245 1.2437 2.7253 0.0081 0.5642 0.1604 870.1731 0.0492 0.0016 871.8918Winter (lbs/day)0.3165 1.2553 2.7118 0.0077 0.5643 0.1605 829.8645 0.0501 0.0016 831.6046 Max (lbs/day)0.3245 1.2553 2.7253 0.0081 0.5643 0.1605 870.1731 0.0501 0.0016 871.8918 Downey Rives Mansion Mitigated Operational Emissions SummaryExisting Buildings - Renovations ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eAnnual Emissions (tons/year for criteria pollutants; MT/year for GHGs)0.0466 0.0705 0.1434 0.0004 0.0271 0.0077 79.8948 0.1314 0.0014 83.6095 ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eSummer (lbs/day)0.2905 0.4919 1.0239 0.0029 0.1991 0.0564 308.8620 0.0184 0.0005 309.4602Winter (lbs/day)0.2872 0.4947 1.0323 0.0028 0.1991 0.0564 293.9265 0.0189 0.0005 294.5359 Max (lbs/day)0.2905 0.4947 1.0323 0.0029 0.1991 0.0564 308.8620 0.0189 0.0005 309.4602New Building - Café ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eAnnual Emissions (tons/year for criteria pollutants; MT/year for GHGs)0.0405 0.1455 0.2400 0.0006 0.0297 0.0091 79.9679 0.1878 0.0007 84.8745 ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2eSummer (lbs/day)0.2766 0.9345 1.4896 0.0037 0.1980 0.0595 418.0900 0.0270 0.0016 419.2526Winter (lbs/day)0.2697 0.9279 1.5895 0.0035 0.1981 0.0596 398.7634 0.0285 0.0016 399.9627 Max (lbs/day)0.2766 0.9345 1.5895 0.0037 0.1981 0.0596 418.0900 0.0285 0.0016 419.2526 Total Project Operational Emissions ROG NOx CO SOx PM10 PM2.5 CO2 CH4 N2O CO2e(tons/year for criteria pollutants; MT/year for GHGs)0.1011 0.3144 0.7227 0.0022 0.1626 0.0461 276.3962 0.3250 0.0022 285.1629lb/day 0.6645 2.0873 5.0225 0.0153 1.1408 0.3209 1,644.8256 0.0914 0.0021 1,647.7153(tons/year for criteria pollutants; MT/year for GHGs)0.0871 0.2160 0.3834 0.0009 0.0568 0.0168 159.8627 0.3192 0.0022 168.4840lb/day 0.5671 1.4292 2.6218 0.0066 0.3972 0.1160 726.9520 0.0474 0.0021 728.7128 Unmitigated Mitigated Operational Traffic Trips Fleet Mix LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MHCurrent54.80%4.58%20.03%12.41%1.71%0.60%1.89%2.84%0.24%0.25%0.49%0.07%0.09%Renovation 54.77%4.54%20.15%12.28%1.66%0.61%1.93%2.92%0.24%0.24%0.50%0.07%0.09%New Café 54.77%4.54%20.15%12.28%1.66%0.61%1.93%2.92%0.24%0.24%0.50%0.07%0.09%Current Weekday Saturday Sunday Weekday Saturday Sunday Average Weekday Saturday Sunday AverageApartments Low Rise 13.18 14.32 12.14 0.928 1.009 0.855 0.931 10.466 11.371 9.640 10.492Apartments Mid Rise 33.25 31.95 29.3 2.342 2.251 2.064 2.219 26.403 25.370 23.266 25.013 Total 46.43 46.27 41.44 3.271 3.259 2.919 3.150 36.869 36.741 32.906 35.505Renovation and New Café Weekday Saturday Sunday Unmitigated Mitigated Weekday Saturday Sunday Average Weekday Saturday Sunday AverageRenovation 82.84 18.47 7.89 202,739 69,539 5.899 1.315 0.562 2.592 65.828 14.677 6.270 28.925New Café 152.58 190.04 158.21 216,330 74,201 10.864 13.532 11.265 11.887 121.247 151.014 125.720 132.660 Total 235.42 208.51 166.1 419,069 143,740 16.763 14.847 11.827 14.479 187.075 165.691 131.990 161.585 Worst Case Trip Generation for Baseline and Proposed Operations VMTExisting Residential 156,144Proposed Office Conversion 69,539Proposed 1200 sf Café 74,201Difference-12,404 Passenger Trips Passenger Trips Max Passenger Trips per Day Average Daily Trip Rate Average Daily Trip Rate Truck Trips Truck Trips Annual VMT 156,144 111,05745,087 Annual VMT 15114 Max Truck Trips per Day311 36121666 20 Corporate Park | Suite 200 | Irvine, CA 92606 P (949) 567-9880 | F (949) 567-9894 RIVES MANSION CalEEMod Output Files 1.1 Land Usage Land Uses Size Metric Lot Acreage Floor Surface Area Population General Office Building 4.84 1000sqft 0.11 4,845.00 0 General Office Building 2.40 1000sqft 0.06 2,400.00 0 General Office Building 0.27 1000sqft 0.01 274.00 0 1.2 Other Project Characteristics Urbanization Climate Zone Urban 9 Wind Speed (m/s)Precipitation Freq (Days)2.2 33 1.3 User Entered Comments & Non-Default Data 1.0 Project Characteristics Utility Company Southern California Edison 2019Operational Year CO2 Intensity (lb/MWhr) 702.44 0.029CH4 Intensity (lb/MWhr) 0.006N2O Intensity (lb/MWhr) Rives Mansion Conversion - Offices Los Angeles-South Coast County, Annual CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 1 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual Project Characteristics - Land Use - Construction Phase - approximately 3 months of work Off-road Equipment - No external construction Off-road Equipment - No external construction Off-road Equipment - No external construction Off-road Equipment - No external construction Trips and VMT - Remodel work estimation Grading - No external construction Mobile Land Use Mitigation - Table Name Column Name Default Value New Value tblConstructionPhase NumDays 100.00 65.00 tblFleetMix HHD 0.03 0.03 tblFleetMix LDA 0.55 0.55 tblFleetMix LDT1 0.05 0.05 tblFleetMix LDT2 0.20 0.20 tblFleetMix LHD1 0.02 0.02 tblFleetMix LHD2 6.0250e-003 6.0900e-003 tblFleetMix MCY 4.9150e-003 5.0050e-003 tblFleetMix MDV 0.12 0.12 tblFleetMix MH 9.2500e-004 9.0700e-004 tblFleetMix MHD 0.02 0.02 tblFleetMix OBUS 2.3910e-003 2.4380e-003 tblFleetMix SBUS 6.7200e-004 6.7700e-004 tblFleetMix UBUS 2.4690e-003 2.3590e-003 tblLandUse LandUseSquareFeet 270.00 274.00 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 2 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblLandUse LandUseSquareFeet 4,840.00 4,845.00 tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00 tblOffRoadEquipment OffRoadEquipmentUnitAmount 4.00 0.00 tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00 tblOffRoadEquipment OffRoadEquipmentUnitAmount 2.00 0.00 tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00 tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00 tblOffRoadEquipment OffRoadEquipmentUnitAmount 2.00 0.00 tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00 tblSolidWaste SolidWasteGenerationRate 6.98 6.99 tblTripsAndVMT WorkerTripNumber 2.00 6.00 tblTripsAndVMT WorkerTripNumber 0.00 4.00 tblTripsAndVMT WorkerTripNumber 0.00 4.00 tblVehicleEF HHD 0.73 0.68 tblVehicleEF HHD 0.09 0.09 tblVehicleEF HHD 0.11 0.10 tblVehicleEF HHD 3.04 2.75 tblVehicleEF HHD 1.18 1.17 tblVehicleEF HHD 3.67 3.50 tblVehicleEF HHD 4,761.38 4,770.40 tblVehicleEF HHD 1,699.59 1,679.50 tblVehicleEF HHD 11.15 10.80 tblVehicleEF HHD 24.36 22.90 tblVehicleEF HHD 4.96 4.59 tblVehicleEF HHD 19.59 19.58 tblVehicleEF HHD 0.03 0.02 tblVehicleEF HHD 0.06 0.06 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 3 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF HHD 0.04 0.04 tblVehicleEF HHD 0.02 0.02 tblVehicleEF HHD 1.3300e-004 1.0700e-004 tblVehicleEF HHD 0.03 0.02 tblVehicleEF HHD 0.03 0.03 tblVehicleEF HHD 8.8320e-003 8.8340e-003 tblVehicleEF HHD 0.02 0.02 tblVehicleEF HHD 1.2400e-004 9.9000e-005 tblVehicleEF HHD 1.3900e-004 1.2200e-004 tblVehicleEF HHD 6.6860e-003 5.6590e-003 tblVehicleEF HHD 0.77 0.69 tblVehicleEF HHD 1.0100e-004 9.1000e-005 tblVehicleEF HHD 0.17 0.16 tblVehicleEF HHD 5.8100e-004 4.9400e-004 tblVehicleEF HHD 0.12 0.10 tblVehicleEF HHD 0.04 0.04 tblVehicleEF HHD 0.02 0.02 tblVehicleEF HHD 1.7300e-004 1.6600e-004 tblVehicleEF HHD 1.3900e-004 1.2200e-004 tblVehicleEF HHD 6.6860e-003 5.6590e-003 tblVehicleEF HHD 0.89 0.80 tblVehicleEF HHD 1.0100e-004 9.1000e-005 tblVehicleEF HHD 0.28 0.27 tblVehicleEF HHD 5.8100e-004 4.9400e-004 tblVehicleEF HHD 0.13 0.11 tblVehicleEF HHD 0.69 0.64 tblVehicleEF HHD 0.09 0.09 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 4 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF HHD 0.11 0.09 tblVehicleEF HHD 2.22 2.00 tblVehicleEF HHD 1.19 1.17 tblVehicleEF HHD 3.49 3.33 tblVehicleEF HHD 5,040.71 5,051.17 tblVehicleEF HHD 1,699.59 1,679.50 tblVehicleEF HHD 11.15 10.80 tblVehicleEF HHD 25.13 23.63 tblVehicleEF HHD 4.69 4.34 tblVehicleEF HHD 19.57 19.57 tblVehicleEF HHD 0.03 0.02 tblVehicleEF HHD 0.06 0.06 tblVehicleEF HHD 0.04 0.04 tblVehicleEF HHD 0.02 0.02 tblVehicleEF HHD 1.3300e-004 1.0700e-004 tblVehicleEF HHD 0.03 0.02 tblVehicleEF HHD 0.03 0.03 tblVehicleEF HHD 8.8320e-003 8.8340e-003 tblVehicleEF HHD 0.02 0.02 tblVehicleEF HHD 1.2400e-004 9.9000e-005 tblVehicleEF HHD 2.1500e-004 1.8800e-004 tblVehicleEF HHD 6.8390e-003 5.7950e-003 tblVehicleEF HHD 0.72 0.65 tblVehicleEF HHD 1.5100e-004 1.3300e-004 tblVehicleEF HHD 0.17 0.16 tblVehicleEF HHD 5.7100e-004 4.8300e-004 tblVehicleEF HHD 0.11 0.10 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 5 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF HHD 0.05 0.05 tblVehicleEF HHD 0.02 0.02 tblVehicleEF HHD 1.7000e-004 1.6300e-004 tblVehicleEF HHD 2.1500e-004 1.8800e-004 tblVehicleEF HHD 6.8390e-003 5.7950e-003 tblVehicleEF HHD 0.84 0.76 tblVehicleEF HHD 1.5100e-004 1.3300e-004 tblVehicleEF HHD 0.28 0.27 tblVehicleEF HHD 5.7100e-004 4.8300e-004 tblVehicleEF HHD 0.12 0.11 tblVehicleEF HHD 0.79 0.73 tblVehicleEF HHD 0.09 0.09 tblVehicleEF HHD 0.11 0.10 tblVehicleEF HHD 4.18 3.78 tblVehicleEF HHD 1.18 1.16 tblVehicleEF HHD 3.70 3.53 tblVehicleEF HHD 4,375.65 4,382.68 tblVehicleEF HHD 1,699.59 1,679.50 tblVehicleEF HHD 11.15 10.80 tblVehicleEF HHD 23.29 21.89 tblVehicleEF HHD 4.87 4.51 tblVehicleEF HHD 19.59 19.58 tblVehicleEF HHD 0.04 0.02 tblVehicleEF HHD 0.06 0.06 tblVehicleEF HHD 0.04 0.04 tblVehicleEF HHD 0.02 0.02 tblVehicleEF HHD 1.3300e-004 1.0700e-004 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 6 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF HHD 0.03 0.02 tblVehicleEF HHD 0.03 0.03 tblVehicleEF HHD 8.8320e-003 8.8340e-003 tblVehicleEF HHD 0.02 0.02 tblVehicleEF HHD 1.2400e-004 9.9000e-005 tblVehicleEF HHD 1.4100e-004 1.2200e-004 tblVehicleEF HHD 7.6070e-003 6.2650e-003 tblVehicleEF HHD 0.82 0.74 tblVehicleEF HHD 9.9000e-005 8.8000e-005 tblVehicleEF HHD 0.17 0.16 tblVehicleEF HHD 6.2500e-004 5.3300e-004 tblVehicleEF HHD 0.12 0.10 tblVehicleEF HHD 0.04 0.04 tblVehicleEF HHD 0.02 0.02 tblVehicleEF HHD 1.7300e-004 1.6700e-004 tblVehicleEF HHD 1.4100e-004 1.2200e-004 tblVehicleEF HHD 7.6070e-003 6.2650e-003 tblVehicleEF HHD 0.96 0.86 tblVehicleEF HHD 9.9000e-005 8.8000e-005 tblVehicleEF HHD 0.28 0.27 tblVehicleEF HHD 6.2500e-004 5.3300e-004 tblVehicleEF HHD 0.13 0.11 tblVehicleEF LDA 7.3540e-003 6.5530e-003 tblVehicleEF LDA 8.2790e-003 7.1270e-003 tblVehicleEF LDA 0.83 0.76 tblVehicleEF LDA 1.59 1.42 tblVehicleEF LDA 307.40 296.37 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 7 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LDA 63.19 61.25 tblVehicleEF LDA 0.07 0.06 tblVehicleEF LDA 0.11 0.09 tblVehicleEF LDA 2.3510e-003 2.2990e-003 tblVehicleEF LDA 2.3880e-003 2.3500e-003 tblVehicleEF LDA 2.1690e-003 2.1210e-003 tblVehicleEF LDA 2.1960e-003 2.1610e-003 tblVehicleEF LDA 0.05 0.05 tblVehicleEF LDA 0.13 0.12 tblVehicleEF LDA 0.05 0.04 tblVehicleEF LDA 0.02 0.02 tblVehicleEF LDA 0.05 0.04 tblVehicleEF LDA 0.11 0.10 tblVehicleEF LDA 3.0810e-003 2.9700e-003 tblVehicleEF LDA 6.5900e-004 6.3700e-004 tblVehicleEF LDA 0.05 0.05 tblVehicleEF LDA 0.13 0.12 tblVehicleEF LDA 0.05 0.04 tblVehicleEF LDA 0.03 0.02 tblVehicleEF LDA 0.05 0.04 tblVehicleEF LDA 0.12 0.11 tblVehicleEF LDA 7.7970e-003 6.9520e-003 tblVehicleEF LDA 7.3440e-003 6.3260e-003 tblVehicleEF LDA 0.91 0.83 tblVehicleEF LDA 1.36 1.21 tblVehicleEF LDA 321.73 310.18 tblVehicleEF LDA 63.19 61.25 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 8 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LDA 0.06 0.06 tblVehicleEF LDA 0.10 0.08 tblVehicleEF LDA 2.3510e-003 2.2990e-003 tblVehicleEF LDA 2.3880e-003 2.3500e-003 tblVehicleEF LDA 2.1690e-003 2.1210e-003 tblVehicleEF LDA 2.1960e-003 2.1610e-003 tblVehicleEF LDA 0.08 0.07 tblVehicleEF LDA 0.14 0.12 tblVehicleEF LDA 0.07 0.06 tblVehicleEF LDA 0.02 0.02 tblVehicleEF LDA 0.04 0.04 tblVehicleEF LDA 0.10 0.09 tblVehicleEF LDA 3.2250e-003 3.1090e-003 tblVehicleEF LDA 6.5500e-004 6.3300e-004 tblVehicleEF LDA 0.08 0.07 tblVehicleEF LDA 0.14 0.12 tblVehicleEF LDA 0.07 0.06 tblVehicleEF LDA 0.03 0.03 tblVehicleEF LDA 0.04 0.04 tblVehicleEF LDA 0.11 0.09 tblVehicleEF LDA 7.2060e-003 6.4200e-003 tblVehicleEF LDA 8.4750e-003 7.2950e-003 tblVehicleEF LDA 0.80 0.73 tblVehicleEF LDA 1.64 1.46 tblVehicleEF LDA 302.15 291.32 tblVehicleEF LDA 63.19 61.25 tblVehicleEF LDA 0.07 0.06 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 9 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LDA 0.11 0.09 tblVehicleEF LDA 2.3510e-003 2.2990e-003 tblVehicleEF LDA 2.3880e-003 2.3500e-003 tblVehicleEF LDA 2.1690e-003 2.1210e-003 tblVehicleEF LDA 2.1960e-003 2.1610e-003 tblVehicleEF LDA 0.05 0.05 tblVehicleEF LDA 0.14 0.13 tblVehicleEF LDA 0.04 0.04 tblVehicleEF LDA 0.02 0.02 tblVehicleEF LDA 0.05 0.05 tblVehicleEF LDA 0.11 0.10 tblVehicleEF LDA 3.0280e-003 2.9190e-003 tblVehicleEF LDA 6.6000e-004 6.3800e-004 tblVehicleEF LDA 0.05 0.05 tblVehicleEF LDA 0.14 0.13 tblVehicleEF LDA 0.04 0.04 tblVehicleEF LDA 0.03 0.02 tblVehicleEF LDA 0.05 0.05 tblVehicleEF LDA 0.13 0.11 tblVehicleEF LDT1 0.02 0.02 tblVehicleEF LDT1 0.02 0.02 tblVehicleEF LDT1 2.23 2.02 tblVehicleEF LDT1 3.82 3.43 tblVehicleEF LDT1 369.30 360.63 tblVehicleEF LDT1 74.64 73.09 tblVehicleEF LDT1 0.21 0.19 tblVehicleEF LDT1 0.22 0.20 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 10 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LDT1 4.1790e-003 3.9490e-003 tblVehicleEF LDT1 3.9740e-003 3.7850e-003 tblVehicleEF LDT1 3.8500e-003 3.6370e-003 tblVehicleEF LDT1 3.6560e-003 3.4820e-003 tblVehicleEF LDT1 0.16 0.15 tblVehicleEF LDT1 0.32 0.30 tblVehicleEF LDT1 0.13 0.12 tblVehicleEF LDT1 0.05 0.05 tblVehicleEF LDT1 0.20 0.19 tblVehicleEF LDT1 0.27 0.24 tblVehicleEF LDT1 3.7230e-003 3.6330e-003 tblVehicleEF LDT1 8.1400e-004 7.9100e-004 tblVehicleEF LDT1 0.16 0.15 tblVehicleEF LDT1 0.32 0.30 tblVehicleEF LDT1 0.13 0.12 tblVehicleEF LDT1 0.08 0.07 tblVehicleEF LDT1 0.20 0.19 tblVehicleEF LDT1 0.30 0.26 tblVehicleEF LDT1 0.02 0.02 tblVehicleEF LDT1 0.02 0.02 tblVehicleEF LDT1 2.40 2.18 tblVehicleEF LDT1 3.23 2.91 tblVehicleEF LDT1 385.31 376.30 tblVehicleEF LDT1 74.64 73.09 tblVehicleEF LDT1 0.19 0.17 tblVehicleEF LDT1 0.21 0.18 tblVehicleEF LDT1 4.1790e-003 3.9490e-003 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 11 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LDT1 3.9740e-003 3.7850e-003 tblVehicleEF LDT1 3.8500e-003 3.6370e-003 tblVehicleEF LDT1 3.6560e-003 3.4820e-003 tblVehicleEF LDT1 0.24 0.23 tblVehicleEF LDT1 0.34 0.32 tblVehicleEF LDT1 0.18 0.17 tblVehicleEF LDT1 0.06 0.05 tblVehicleEF LDT1 0.19 0.18 tblVehicleEF LDT1 0.24 0.21 tblVehicleEF LDT1 3.8860e-003 3.7920e-003 tblVehicleEF LDT1 8.0400e-004 7.8200e-004 tblVehicleEF LDT1 0.24 0.23 tblVehicleEF LDT1 0.34 0.32 tblVehicleEF LDT1 0.18 0.17 tblVehicleEF LDT1 0.08 0.07 tblVehicleEF LDT1 0.19 0.18 tblVehicleEF LDT1 0.26 0.23 tblVehicleEF LDT1 0.02 0.02 tblVehicleEF LDT1 0.02 0.02 tblVehicleEF LDT1 2.16 1.96 tblVehicleEF LDT1 3.94 3.54 tblVehicleEF LDT1 363.43 354.88 tblVehicleEF LDT1 74.64 73.09 tblVehicleEF LDT1 0.21 0.19 tblVehicleEF LDT1 0.23 0.20 tblVehicleEF LDT1 4.1790e-003 3.9490e-003 tblVehicleEF LDT1 3.9740e-003 3.7850e-003 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 12 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LDT1 3.8500e-003 3.6370e-003 tblVehicleEF LDT1 3.6560e-003 3.4820e-003 tblVehicleEF LDT1 0.16 0.15 tblVehicleEF LDT1 0.37 0.35 tblVehicleEF LDT1 0.12 0.11 tblVehicleEF LDT1 0.05 0.05 tblVehicleEF LDT1 0.24 0.23 tblVehicleEF LDT1 0.28 0.25 tblVehicleEF LDT1 3.6640e-003 3.5750e-003 tblVehicleEF LDT1 8.1600e-004 7.9300e-004 tblVehicleEF LDT1 0.16 0.15 tblVehicleEF LDT1 0.37 0.35 tblVehicleEF LDT1 0.12 0.11 tblVehicleEF LDT1 0.08 0.07 tblVehicleEF LDT1 0.24 0.23 tblVehicleEF LDT1 0.31 0.27 tblVehicleEF LDT2 9.7260e-003 8.6320e-003 tblVehicleEF LDT2 9.6720e-003 8.2970e-003 tblVehicleEF LDT2 1.08 0.97 tblVehicleEF LDT2 1.91 1.67 tblVehicleEF LDT2 420.00 408.00 tblVehicleEF LDT2 85.52 83.22 tblVehicleEF LDT2 0.12 0.10 tblVehicleEF LDT2 0.17 0.14 tblVehicleEF LDT2 2.1860e-003 2.1760e-003 tblVehicleEF LDT2 2.3470e-003 2.3520e-003 tblVehicleEF LDT2 2.0100e-003 2.0020e-003 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 13 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LDT2 2.1590e-003 2.1630e-003 tblVehicleEF LDT2 0.05 0.05 tblVehicleEF LDT2 0.13 0.12 tblVehicleEF LDT2 0.05 0.05 tblVehicleEF LDT2 0.02 0.02 tblVehicleEF LDT2 0.07 0.07 tblVehicleEF LDT2 0.13 0.11 tblVehicleEF LDT2 4.2100e-003 4.0880e-003 tblVehicleEF LDT2 8.8800e-004 8.6100e-004 tblVehicleEF LDT2 0.05 0.05 tblVehicleEF LDT2 0.13 0.12 tblVehicleEF LDT2 0.05 0.05 tblVehicleEF LDT2 0.04 0.03 tblVehicleEF LDT2 0.07 0.07 tblVehicleEF LDT2 0.14 0.12 tblVehicleEF LDT2 0.01 9.1430e-003 tblVehicleEF LDT2 8.5960e-003 7.3790e-003 tblVehicleEF LDT2 1.18 1.07 tblVehicleEF LDT2 1.63 1.43 tblVehicleEF LDT2 438.87 426.32 tblVehicleEF LDT2 85.52 83.22 tblVehicleEF LDT2 0.10 0.09 tblVehicleEF LDT2 0.16 0.13 tblVehicleEF LDT2 2.1860e-003 2.1760e-003 tblVehicleEF LDT2 2.3470e-003 2.3520e-003 tblVehicleEF LDT2 2.0100e-003 2.0020e-003 tblVehicleEF LDT2 2.1590e-003 2.1630e-003 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 14 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LDT2 0.09 0.08 tblVehicleEF LDT2 0.13 0.12 tblVehicleEF LDT2 0.07 0.07 tblVehicleEF LDT2 0.03 0.02 tblVehicleEF LDT2 0.07 0.06 tblVehicleEF LDT2 0.12 0.10 tblVehicleEF LDT2 4.4000e-003 4.2730e-003 tblVehicleEF LDT2 8.8300e-004 8.5600e-004 tblVehicleEF LDT2 0.09 0.08 tblVehicleEF LDT2 0.13 0.12 tblVehicleEF LDT2 0.07 0.07 tblVehicleEF LDT2 0.04 0.03 tblVehicleEF LDT2 0.07 0.06 tblVehicleEF LDT2 0.13 0.11 tblVehicleEF LDT2 9.5390e-003 8.4620e-003 tblVehicleEF LDT2 9.9010e-003 8.4930e-003 tblVehicleEF LDT2 1.04 0.94 tblVehicleEF LDT2 1.97 1.73 tblVehicleEF LDT2 413.07 401.27 tblVehicleEF LDT2 85.52 83.22 tblVehicleEF LDT2 0.11 0.10 tblVehicleEF LDT2 0.17 0.15 tblVehicleEF LDT2 2.1860e-003 2.1760e-003 tblVehicleEF LDT2 2.3470e-003 2.3520e-003 tblVehicleEF LDT2 2.0100e-003 2.0020e-003 tblVehicleEF LDT2 2.1590e-003 2.1630e-003 tblVehicleEF LDT2 0.05 0.05 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 15 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LDT2 0.14 0.13 tblVehicleEF LDT2 0.05 0.05 tblVehicleEF LDT2 0.02 0.02 tblVehicleEF LDT2 0.08 0.08 tblVehicleEF LDT2 0.13 0.11 tblVehicleEF LDT2 4.1400e-003 4.0210e-003 tblVehicleEF LDT2 8.8900e-004 8.6200e-004 tblVehicleEF LDT2 0.05 0.05 tblVehicleEF LDT2 0.14 0.13 tblVehicleEF LDT2 0.05 0.05 tblVehicleEF LDT2 0.04 0.03 tblVehicleEF LDT2 0.08 0.08 tblVehicleEF LDT2 0.15 0.13 tblVehicleEF LHD1 6.6400e-003 6.3570e-003 tblVehicleEF LHD1 0.02 0.02 tblVehicleEF LHD1 0.03 0.02 tblVehicleEF LHD1 0.16 0.16 tblVehicleEF LHD1 1.20 1.07 tblVehicleEF LHD1 3.55 3.29 tblVehicleEF LHD1 8.87 8.89 tblVehicleEF LHD1 632.57 622.45 tblVehicleEF LHD1 37.18 35.85 tblVehicleEF LHD1 0.07 0.07 tblVehicleEF LHD1 1.25 1.15 tblVehicleEF LHD1 1.18 1.13 tblVehicleEF LHD1 7.7100e-004 7.9800e-004 tblVehicleEF LHD1 9.7940e-003 9.8890e-003 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 16 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LHD1 9.8460e-003 9.6360e-003 tblVehicleEF LHD1 1.3190e-003 1.1970e-003 tblVehicleEF LHD1 7.3800e-004 7.6300e-004 tblVehicleEF LHD1 2.4490e-003 2.4720e-003 tblVehicleEF LHD1 9.3870e-003 9.1880e-003 tblVehicleEF LHD1 1.2170e-003 1.1020e-003 tblVehicleEF LHD1 3.6230e-003 3.4680e-003 tblVehicleEF LHD1 0.12 0.11 tblVehicleEF LHD1 0.02 0.02 tblVehicleEF LHD1 2.1170e-003 2.0560e-003 tblVehicleEF LHD1 0.08 0.07 tblVehicleEF LHD1 0.34 0.33 tblVehicleEF LHD1 0.35 0.32 tblVehicleEF LHD1 6.2350e-003 6.1270e-003 tblVehicleEF LHD1 4.3800e-004 4.2000e-004 tblVehicleEF LHD1 3.6230e-003 3.4680e-003 tblVehicleEF LHD1 0.12 0.11 tblVehicleEF LHD1 0.03 0.03 tblVehicleEF LHD1 2.1170e-003 2.0560e-003 tblVehicleEF LHD1 0.10 0.10 tblVehicleEF LHD1 0.34 0.33 tblVehicleEF LHD1 0.38 0.35 tblVehicleEF LHD1 6.6400e-003 6.3570e-003 tblVehicleEF LHD1 0.02 0.02 tblVehicleEF LHD1 0.02 0.02 tblVehicleEF LHD1 0.16 0.16 tblVehicleEF LHD1 1.22 1.08 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 17 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LHD1 3.39 3.14 tblVehicleEF LHD1 8.87 8.89 tblVehicleEF LHD1 632.57 622.45 tblVehicleEF LHD1 37.18 35.85 tblVehicleEF LHD1 0.07 0.07 tblVehicleEF LHD1 1.17 1.07 tblVehicleEF LHD1 1.13 1.08 tblVehicleEF LHD1 7.7100e-004 7.9800e-004 tblVehicleEF LHD1 9.7940e-003 9.8890e-003 tblVehicleEF LHD1 9.8460e-003 9.6360e-003 tblVehicleEF LHD1 1.3190e-003 1.1970e-003 tblVehicleEF LHD1 7.3800e-004 7.6300e-004 tblVehicleEF LHD1 2.4490e-003 2.4720e-003 tblVehicleEF LHD1 9.3870e-003 9.1880e-003 tblVehicleEF LHD1 1.2170e-003 1.1020e-003 tblVehicleEF LHD1 5.4510e-003 5.2080e-003 tblVehicleEF LHD1 0.12 0.12 tblVehicleEF LHD1 0.02 0.02 tblVehicleEF LHD1 3.0210e-003 2.9180e-003 tblVehicleEF LHD1 0.08 0.08 tblVehicleEF LHD1 0.33 0.32 tblVehicleEF LHD1 0.34 0.31 tblVehicleEF LHD1 6.2350e-003 6.1280e-003 tblVehicleEF LHD1 4.3500e-004 4.1700e-004 tblVehicleEF LHD1 5.4510e-003 5.2080e-003 tblVehicleEF LHD1 0.12 0.12 tblVehicleEF LHD1 0.03 0.03 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 18 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LHD1 3.0210e-003 2.9180e-003 tblVehicleEF LHD1 0.10 0.10 tblVehicleEF LHD1 0.33 0.32 tblVehicleEF LHD1 0.37 0.34 tblVehicleEF LHD1 6.6400e-003 6.3570e-003 tblVehicleEF LHD1 0.02 0.02 tblVehicleEF LHD1 0.03 0.02 tblVehicleEF LHD1 0.16 0.16 tblVehicleEF LHD1 1.20 1.06 tblVehicleEF LHD1 3.58 3.32 tblVehicleEF LHD1 8.87 8.89 tblVehicleEF LHD1 632.57 622.45 tblVehicleEF LHD1 37.18 35.85 tblVehicleEF LHD1 0.07 0.07 tblVehicleEF LHD1 1.22 1.13 tblVehicleEF LHD1 1.19 1.14 tblVehicleEF LHD1 7.7100e-004 7.9800e-004 tblVehicleEF LHD1 9.7940e-003 9.8890e-003 tblVehicleEF LHD1 9.8460e-003 9.6360e-003 tblVehicleEF LHD1 1.3190e-003 1.1970e-003 tblVehicleEF LHD1 7.3800e-004 7.6300e-004 tblVehicleEF LHD1 2.4490e-003 2.4720e-003 tblVehicleEF LHD1 9.3870e-003 9.1880e-003 tblVehicleEF LHD1 1.2170e-003 1.1020e-003 tblVehicleEF LHD1 3.8750e-003 3.6860e-003 tblVehicleEF LHD1 0.14 0.13 tblVehicleEF LHD1 0.02 0.02 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 19 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LHD1 2.0980e-003 2.0330e-003 tblVehicleEF LHD1 0.08 0.07 tblVehicleEF LHD1 0.36 0.35 tblVehicleEF LHD1 0.35 0.32 tblVehicleEF LHD1 6.2350e-003 6.1270e-003 tblVehicleEF LHD1 4.3900e-004 4.2100e-004 tblVehicleEF LHD1 3.8750e-003 3.6860e-003 tblVehicleEF LHD1 0.14 0.13 tblVehicleEF LHD1 0.03 0.03 tblVehicleEF LHD1 2.0980e-003 2.0330e-003 tblVehicleEF LHD1 0.10 0.10 tblVehicleEF LHD1 0.36 0.35 tblVehicleEF LHD1 0.38 0.36 tblVehicleEF LHD2 4.9250e-003 4.6500e-003 tblVehicleEF LHD2 6.8980e-003 5.8620e-003 tblVehicleEF LHD2 0.01 0.01 tblVehicleEF LHD2 0.14 0.14 tblVehicleEF LHD2 0.53 0.45 tblVehicleEF LHD2 1.86 1.67 tblVehicleEF LHD2 13.49 13.53 tblVehicleEF LHD2 644.76 634.55 tblVehicleEF LHD2 31.23 30.01 tblVehicleEF LHD2 0.10 0.10 tblVehicleEF LHD2 1.03 0.88 tblVehicleEF LHD2 0.72 0.66 tblVehicleEF LHD2 1.1700e-003 1.1790e-003 tblVehicleEF LHD2 0.01 0.01 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 20 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LHD2 0.01 9.7680e-003 tblVehicleEF LHD2 6.2400e-004 5.5800e-004 tblVehicleEF LHD2 1.1200e-003 1.1280e-003 tblVehicleEF LHD2 2.6160e-003 2.6300e-003 tblVehicleEF LHD2 9.8240e-003 9.3300e-003 tblVehicleEF LHD2 5.7400e-004 5.1400e-004 tblVehicleEF LHD2 1.5840e-003 1.4140e-003 tblVehicleEF LHD2 0.05 0.05 tblVehicleEF LHD2 0.02 0.02 tblVehicleEF LHD2 9.5900e-004 8.8000e-004 tblVehicleEF LHD2 0.06 0.05 tblVehicleEF LHD2 0.12 0.11 tblVehicleEF LHD2 0.18 0.15 tblVehicleEF LHD2 6.2960e-003 6.1920e-003 tblVehicleEF LHD2 3.4700e-004 3.3100e-004 tblVehicleEF LHD2 1.5840e-003 1.4140e-003 tblVehicleEF LHD2 0.05 0.05 tblVehicleEF LHD2 0.02 0.02 tblVehicleEF LHD2 9.5900e-004 8.8000e-004 tblVehicleEF LHD2 0.07 0.06 tblVehicleEF LHD2 0.12 0.11 tblVehicleEF LHD2 0.19 0.17 tblVehicleEF LHD2 4.9250e-003 4.6500e-003 tblVehicleEF LHD2 7.0100e-003 5.9540e-003 tblVehicleEF LHD2 0.01 0.01 tblVehicleEF LHD2 0.14 0.14 tblVehicleEF LHD2 0.53 0.46 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 21 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LHD2 1.78 1.60 tblVehicleEF LHD2 13.49 13.53 tblVehicleEF LHD2 644.76 634.55 tblVehicleEF LHD2 31.23 30.01 tblVehicleEF LHD2 0.10 0.10 tblVehicleEF LHD2 0.97 0.83 tblVehicleEF LHD2 0.69 0.63 tblVehicleEF LHD2 1.1700e-003 1.1790e-003 tblVehicleEF LHD2 0.01 0.01 tblVehicleEF LHD2 0.01 9.7680e-003 tblVehicleEF LHD2 6.2400e-004 5.5800e-004 tblVehicleEF LHD2 1.1200e-003 1.1280e-003 tblVehicleEF LHD2 2.6160e-003 2.6300e-003 tblVehicleEF LHD2 9.8240e-003 9.3300e-003 tblVehicleEF LHD2 5.7400e-004 5.1400e-004 tblVehicleEF LHD2 2.3650e-003 2.1090e-003 tblVehicleEF LHD2 0.06 0.05 tblVehicleEF LHD2 0.02 0.02 tblVehicleEF LHD2 1.3560e-003 1.2380e-003 tblVehicleEF LHD2 0.06 0.05 tblVehicleEF LHD2 0.12 0.10 tblVehicleEF LHD2 0.17 0.15 tblVehicleEF LHD2 6.2960e-003 6.1920e-003 tblVehicleEF LHD2 3.4500e-004 3.3000e-004 tblVehicleEF LHD2 2.3650e-003 2.1090e-003 tblVehicleEF LHD2 0.06 0.05 tblVehicleEF LHD2 0.02 0.02 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 22 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LHD2 1.3560e-003 1.2380e-003 tblVehicleEF LHD2 0.07 0.06 tblVehicleEF LHD2 0.12 0.10 tblVehicleEF LHD2 0.19 0.16 tblVehicleEF LHD2 4.9250e-003 4.6500e-003 tblVehicleEF LHD2 6.8690e-003 5.8380e-003 tblVehicleEF LHD2 0.01 0.01 tblVehicleEF LHD2 0.14 0.14 tblVehicleEF LHD2 0.53 0.45 tblVehicleEF LHD2 1.88 1.68 tblVehicleEF LHD2 13.49 13.53 tblVehicleEF LHD2 644.76 634.55 tblVehicleEF LHD2 31.23 30.01 tblVehicleEF LHD2 0.10 0.10 tblVehicleEF LHD2 1.01 0.87 tblVehicleEF LHD2 0.72 0.67 tblVehicleEF LHD2 1.1700e-003 1.1790e-003 tblVehicleEF LHD2 0.01 0.01 tblVehicleEF LHD2 0.01 9.7680e-003 tblVehicleEF LHD2 6.2400e-004 5.5800e-004 tblVehicleEF LHD2 1.1200e-003 1.1280e-003 tblVehicleEF LHD2 2.6160e-003 2.6300e-003 tblVehicleEF LHD2 9.8240e-003 9.3300e-003 tblVehicleEF LHD2 5.7400e-004 5.1400e-004 tblVehicleEF LHD2 1.6660e-003 1.4720e-003 tblVehicleEF LHD2 0.06 0.05 tblVehicleEF LHD2 0.02 0.02 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 23 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF LHD2 9.4000e-004 8.5900e-004 tblVehicleEF LHD2 0.06 0.05 tblVehicleEF LHD2 0.13 0.12 tblVehicleEF LHD2 0.18 0.16 tblVehicleEF LHD2 6.2960e-003 6.1910e-003 tblVehicleEF LHD2 3.4700e-004 3.3100e-004 tblVehicleEF LHD2 1.6660e-003 1.4720e-003 tblVehicleEF LHD2 0.06 0.05 tblVehicleEF LHD2 0.02 0.02 tblVehicleEF LHD2 9.4000e-004 8.5900e-004 tblVehicleEF LHD2 0.07 0.06 tblVehicleEF LHD2 0.13 0.12 tblVehicleEF LHD2 0.19 0.17 tblVehicleEF MCY 0.52 0.53 tblVehicleEF MCY 0.15 0.15 tblVehicleEF MCY 19.86 19.48 tblVehicleEF MCY 9.61 9.63 tblVehicleEF MCY 186.87 187.52 tblVehicleEF MCY 45.76 45.30 tblVehicleEF MCY 1.14 1.13 tblVehicleEF MCY 0.31 0.31 tblVehicleEF MCY 2.2370e-003 2.3100e-003 tblVehicleEF MCY 4.2150e-003 4.0640e-003 tblVehicleEF MCY 2.0950e-003 2.1620e-003 tblVehicleEF MCY 3.9830e-003 3.8350e-003 tblVehicleEF MCY 1.08 1.07 tblVehicleEF MCY 0.68 0.66 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 24 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MCY 0.67 0.66 tblVehicleEF MCY 2.65 2.62 tblVehicleEF MCY 0.66 0.63 tblVehicleEF MCY 2.09 2.08 tblVehicleEF MCY 6.7600e-004 6.7100e-004 tblVehicleEF MCY 1.08 1.07 tblVehicleEF MCY 0.68 0.66 tblVehicleEF MCY 0.67 0.66 tblVehicleEF MCY 3.27 3.25 tblVehicleEF MCY 0.66 0.63 tblVehicleEF MCY 2.28 2.26 tblVehicleEF MCY 0.51 0.52 tblVehicleEF MCY 0.14 0.14 tblVehicleEF MCY 19.08 18.74 tblVehicleEF MCY 8.81 8.81 tblVehicleEF MCY 186.87 187.52 tblVehicleEF MCY 45.76 45.30 tblVehicleEF MCY 0.99 0.99 tblVehicleEF MCY 0.29 0.29 tblVehicleEF MCY 2.2370e-003 2.3100e-003 tblVehicleEF MCY 4.2150e-003 4.0640e-003 tblVehicleEF MCY 2.0950e-003 2.1620e-003 tblVehicleEF MCY 3.9830e-003 3.8350e-003 tblVehicleEF MCY 1.76 1.74 tblVehicleEF MCY 0.74 0.72 tblVehicleEF MCY 1.11 1.10 tblVehicleEF MCY 2.58 2.56 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 25 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MCY 0.62 0.60 tblVehicleEF MCY 1.86 1.85 tblVehicleEF MCY 2.2580e-003 2.2590e-003 tblVehicleEF MCY 6.5600e-004 6.5100e-004 tblVehicleEF MCY 1.76 1.74 tblVehicleEF MCY 0.74 0.72 tblVehicleEF MCY 1.11 1.10 tblVehicleEF MCY 3.18 3.17 tblVehicleEF MCY 0.62 0.60 tblVehicleEF MCY 2.02 2.01 tblVehicleEF MCY 0.52 0.53 tblVehicleEF MCY 0.16 0.16 tblVehicleEF MCY 19.96 19.59 tblVehicleEF MCY 9.74 9.76 tblVehicleEF MCY 186.87 187.52 tblVehicleEF MCY 45.76 45.30 tblVehicleEF MCY 1.11 1.11 tblVehicleEF MCY 0.31 0.31 tblVehicleEF MCY 2.2370e-003 2.3100e-003 tblVehicleEF MCY 4.2150e-003 4.0640e-003 tblVehicleEF MCY 2.0950e-003 2.1620e-003 tblVehicleEF MCY 3.9830e-003 3.8350e-003 tblVehicleEF MCY 1.18 1.17 tblVehicleEF MCY 0.88 0.86 tblVehicleEF MCY 0.64 0.63 tblVehicleEF MCY 2.66 2.64 tblVehicleEF MCY 0.75 0.73 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 26 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MCY 2.14 2.12 tblVehicleEF MCY 6.8000e-004 6.7500e-004 tblVehicleEF MCY 1.18 1.17 tblVehicleEF MCY 0.88 0.86 tblVehicleEF MCY 0.64 0.63 tblVehicleEF MCY 3.28 3.26 tblVehicleEF MCY 0.75 0.73 tblVehicleEF MCY 2.32 2.31 tblVehicleEF MDV 0.02 0.02 tblVehicleEF MDV 0.02 0.02 tblVehicleEF MDV 1.93 1.77 tblVehicleEF MDV 3.43 3.11 tblVehicleEF MDV 556.88 543.27 tblVehicleEF MDV 111.92 109.34 tblVehicleEF MDV 0.22 0.19 tblVehicleEF MDV 0.32 0.29 tblVehicleEF MDV 2.5190e-003 2.4830e-003 tblVehicleEF MDV 2.6970e-003 2.6470e-003 tblVehicleEF MDV 2.3260e-003 2.2920e-003 tblVehicleEF MDV 2.4840e-003 2.4370e-003 tblVehicleEF MDV 0.07 0.07 tblVehicleEF MDV 0.18 0.17 tblVehicleEF MDV 0.08 0.07 tblVehicleEF MDV 0.06 0.05 tblVehicleEF MDV 0.10 0.09 tblVehicleEF MDV 0.28 0.25 tblVehicleEF MDV 5.5880e-003 5.4490e-003 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 27 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MDV 1.1800e-003 1.1480e-003 tblVehicleEF MDV 0.07 0.07 tblVehicleEF MDV 0.18 0.17 tblVehicleEF MDV 0.08 0.07 tblVehicleEF MDV 0.08 0.07 tblVehicleEF MDV 0.10 0.09 tblVehicleEF MDV 0.30 0.27 tblVehicleEF MDV 0.02 0.02 tblVehicleEF MDV 0.02 0.02 tblVehicleEF MDV 2.07 1.90 tblVehicleEF MDV 2.94 2.66 tblVehicleEF MDV 581.37 567.14 tblVehicleEF MDV 111.92 109.34 tblVehicleEF MDV 0.19 0.17 tblVehicleEF MDV 0.30 0.26 tblVehicleEF MDV 2.5190e-003 2.4830e-003 tblVehicleEF MDV 2.6970e-003 2.6470e-003 tblVehicleEF MDV 2.3260e-003 2.2920e-003 tblVehicleEF MDV 2.4840e-003 2.4370e-003 tblVehicleEF MDV 0.12 0.11 tblVehicleEF MDV 0.18 0.17 tblVehicleEF MDV 0.11 0.10 tblVehicleEF MDV 0.06 0.05 tblVehicleEF MDV 0.09 0.09 tblVehicleEF MDV 0.25 0.22 tblVehicleEF MDV 5.8340e-003 5.6890e-003 tblVehicleEF MDV 1.1710e-003 1.1400e-003 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 28 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MDV 0.12 0.11 tblVehicleEF MDV 0.18 0.17 tblVehicleEF MDV 0.11 0.10 tblVehicleEF MDV 0.08 0.07 tblVehicleEF MDV 0.09 0.09 tblVehicleEF MDV 0.27 0.24 tblVehicleEF MDV 0.02 0.02 tblVehicleEF MDV 0.02 0.02 tblVehicleEF MDV 1.88 1.72 tblVehicleEF MDV 3.53 3.20 tblVehicleEF MDV 547.90 534.52 tblVehicleEF MDV 111.92 109.34 tblVehicleEF MDV 0.21 0.19 tblVehicleEF MDV 0.33 0.29 tblVehicleEF MDV 2.5190e-003 2.4830e-003 tblVehicleEF MDV 2.6970e-003 2.6470e-003 tblVehicleEF MDV 2.3260e-003 2.2920e-003 tblVehicleEF MDV 2.4840e-003 2.4370e-003 tblVehicleEF MDV 0.07 0.07 tblVehicleEF MDV 0.19 0.18 tblVehicleEF MDV 0.07 0.07 tblVehicleEF MDV 0.06 0.05 tblVehicleEF MDV 0.11 0.11 tblVehicleEF MDV 0.28 0.25 tblVehicleEF MDV 5.4970e-003 5.3610e-003 tblVehicleEF MDV 1.1820e-003 1.1500e-003 tblVehicleEF MDV 0.07 0.07 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 29 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MDV 0.19 0.18 tblVehicleEF MDV 0.07 0.07 tblVehicleEF MDV 0.08 0.07 tblVehicleEF MDV 0.11 0.11 tblVehicleEF MDV 0.31 0.28 tblVehicleEF MH 0.05 0.04 tblVehicleEF MH 0.04 0.03 tblVehicleEF MH 4.38 3.53 tblVehicleEF MH 7.91 7.14 tblVehicleEF MH 1,144.86 1,138.98 tblVehicleEF MH 66.54 63.70 tblVehicleEF MH 1.35 1.26 tblVehicleEF MH 0.95 0.90 tblVehicleEF MH 0.01 0.01 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 1.9690e-003 1.5790e-003 tblVehicleEF MH 3.1910e-003 3.1950e-003 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 1.8330e-003 1.4630e-003 tblVehicleEF MH 1.30 1.18 tblVehicleEF MH 0.09 0.08 tblVehicleEF MH 0.54 0.49 tblVehicleEF MH 0.16 0.13 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 0.50 0.43 tblVehicleEF MH 0.01 0.01 tblVehicleEF MH 8.0500e-004 7.6200e-004 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 30 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MH 1.30 1.18 tblVehicleEF MH 0.09 0.08 tblVehicleEF MH 0.54 0.49 tblVehicleEF MH 0.21 0.18 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 0.54 0.47 tblVehicleEF MH 0.05 0.04 tblVehicleEF MH 0.04 0.03 tblVehicleEF MH 4.42 3.59 tblVehicleEF MH 7.46 6.72 tblVehicleEF MH 1,144.86 1,138.98 tblVehicleEF MH 66.54 63.70 tblVehicleEF MH 1.24 1.15 tblVehicleEF MH 0.90 0.86 tblVehicleEF MH 0.01 0.01 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 1.9690e-003 1.5790e-003 tblVehicleEF MH 3.1910e-003 3.1950e-003 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 1.8330e-003 1.4630e-003 tblVehicleEF MH 1.92 1.74 tblVehicleEF MH 0.09 0.08 tblVehicleEF MH 0.78 0.71 tblVehicleEF MH 0.16 0.13 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 0.47 0.41 tblVehicleEF MH 0.01 0.01 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 31 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MH 7.9700e-004 7.5500e-004 tblVehicleEF MH 1.92 1.74 tblVehicleEF MH 0.09 0.08 tblVehicleEF MH 0.78 0.71 tblVehicleEF MH 0.22 0.18 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 0.52 0.45 tblVehicleEF MH 0.05 0.04 tblVehicleEF MH 0.04 0.03 tblVehicleEF MH 4.36 3.51 tblVehicleEF MH 7.97 7.19 tblVehicleEF MH 1,144.86 1,138.98 tblVehicleEF MH 66.54 63.70 tblVehicleEF MH 1.32 1.23 tblVehicleEF MH 0.96 0.91 tblVehicleEF MH 0.01 0.01 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 1.9690e-003 1.5790e-003 tblVehicleEF MH 3.1910e-003 3.1950e-003 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 1.8330e-003 1.4630e-003 tblVehicleEF MH 1.49 1.35 tblVehicleEF MH 0.12 0.10 tblVehicleEF MH 0.56 0.51 tblVehicleEF MH 0.16 0.13 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 0.50 0.43 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 32 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MH 0.01 0.01 tblVehicleEF MH 8.0600e-004 7.6300e-004 tblVehicleEF MH 1.49 1.35 tblVehicleEF MH 0.12 0.10 tblVehicleEF MH 0.56 0.51 tblVehicleEF MH 0.21 0.18 tblVehicleEF MH 0.02 0.02 tblVehicleEF MH 0.55 0.47 tblVehicleEF MHD 0.02 0.02 tblVehicleEF MHD 0.01 8.6590e-003 tblVehicleEF MHD 0.06 0.06 tblVehicleEF MHD 0.49 0.44 tblVehicleEF MHD 0.80 0.61 tblVehicleEF MHD 8.21 7.49 tblVehicleEF MHD 132.93 133.10 tblVehicleEF MHD 1,162.43 1,158.03 tblVehicleEF MHD 66.84 65.62 tblVehicleEF MHD 0.99 0.81 tblVehicleEF MHD 2.53 1.86 tblVehicleEF MHD 9.82 9.86 tblVehicleEF MHD 3.7740e-003 2.2420e-003 tblVehicleEF MHD 0.07 0.04 tblVehicleEF MHD 1.0230e-003 9.3600e-004 tblVehicleEF MHD 3.6100e-003 2.1450e-003 tblVehicleEF MHD 0.06 0.04 tblVehicleEF MHD 9.4200e-004 8.6100e-004 tblVehicleEF MHD 1.4570e-003 1.3410e-003 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 33 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MHD 0.06 0.05 tblVehicleEF MHD 0.04 0.03 tblVehicleEF MHD 8.9000e-004 8.3700e-004 tblVehicleEF MHD 0.14 0.09 tblVehicleEF MHD 0.03 0.03 tblVehicleEF MHD 0.50 0.46 tblVehicleEF MHD 1.2820e-003 1.2830e-003 tblVehicleEF MHD 0.01 0.01 tblVehicleEF MHD 8.1300e-004 7.8800e-004 tblVehicleEF MHD 1.4570e-003 1.3410e-003 tblVehicleEF MHD 0.06 0.05 tblVehicleEF MHD 0.05 0.04 tblVehicleEF MHD 8.9000e-004 8.3700e-004 tblVehicleEF MHD 0.16 0.11 tblVehicleEF MHD 0.03 0.03 tblVehicleEF MHD 0.55 0.50 tblVehicleEF MHD 0.02 0.02 tblVehicleEF MHD 0.01 8.7760e-003 tblVehicleEF MHD 0.06 0.06 tblVehicleEF MHD 0.36 0.32 tblVehicleEF MHD 0.81 0.62 tblVehicleEF MHD 7.79 7.11 tblVehicleEF MHD 140.79 140.97 tblVehicleEF MHD 1,162.43 1,158.03 tblVehicleEF MHD 66.84 65.62 tblVehicleEF MHD 1.02 0.84 tblVehicleEF MHD 2.38 1.75 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 34 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MHD 9.77 9.81 tblVehicleEF MHD 3.1810e-003 1.8900e-003 tblVehicleEF MHD 0.07 0.04 tblVehicleEF MHD 1.0230e-003 9.3600e-004 tblVehicleEF MHD 3.0440e-003 1.8090e-003 tblVehicleEF MHD 0.06 0.04 tblVehicleEF MHD 9.4200e-004 8.6100e-004 tblVehicleEF MHD 2.1940e-003 2.0150e-003 tblVehicleEF MHD 0.06 0.05 tblVehicleEF MHD 0.03 0.03 tblVehicleEF MHD 1.2840e-003 1.1980e-003 tblVehicleEF MHD 0.14 0.09 tblVehicleEF MHD 0.03 0.02 tblVehicleEF MHD 0.48 0.44 tblVehicleEF MHD 1.3550e-003 1.3570e-003 tblVehicleEF MHD 0.01 0.01 tblVehicleEF MHD 8.0500e-004 7.8100e-004 tblVehicleEF MHD 2.1940e-003 2.0150e-003 tblVehicleEF MHD 0.06 0.05 tblVehicleEF MHD 0.05 0.04 tblVehicleEF MHD 1.2840e-003 1.1980e-003 tblVehicleEF MHD 0.16 0.11 tblVehicleEF MHD 0.03 0.02 tblVehicleEF MHD 0.53 0.48 tblVehicleEF MHD 0.02 0.02 tblVehicleEF MHD 0.01 8.6270e-003 tblVehicleEF MHD 0.06 0.06 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 35 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MHD 0.68 0.61 tblVehicleEF MHD 0.80 0.61 tblVehicleEF MHD 8.28 7.56 tblVehicleEF MHD 122.05 122.21 tblVehicleEF MHD 1,162.43 1,158.03 tblVehicleEF MHD 66.84 65.62 tblVehicleEF MHD 0.95 0.78 tblVehicleEF MHD 2.48 1.83 tblVehicleEF MHD 9.83 9.87 tblVehicleEF MHD 4.5920e-003 2.7290e-003 tblVehicleEF MHD 0.07 0.04 tblVehicleEF MHD 1.0230e-003 9.3600e-004 tblVehicleEF MHD 4.3930e-003 2.6110e-003 tblVehicleEF MHD 0.06 0.04 tblVehicleEF MHD 9.4200e-004 8.6100e-004 tblVehicleEF MHD 1.5480e-003 1.4110e-003 tblVehicleEF MHD 0.06 0.06 tblVehicleEF MHD 0.04 0.04 tblVehicleEF MHD 8.8000e-004 8.2400e-004 tblVehicleEF MHD 0.14 0.09 tblVehicleEF MHD 0.03 0.03 tblVehicleEF MHD 0.51 0.46 tblVehicleEF MHD 1.1800e-003 1.1810e-003 tblVehicleEF MHD 0.01 0.01 tblVehicleEF MHD 8.1400e-004 7.8900e-004 tblVehicleEF MHD 1.5480e-003 1.4110e-003 tblVehicleEF MHD 0.06 0.06 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 36 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF MHD 0.05 0.05 tblVehicleEF MHD 8.8000e-004 8.2400e-004 tblVehicleEF MHD 0.16 0.11 tblVehicleEF MHD 0.03 0.03 tblVehicleEF MHD 0.56 0.51 tblVehicleEF OBUS 0.01 0.01 tblVehicleEF OBUS 0.01 0.01 tblVehicleEF OBUS 0.03 0.03 tblVehicleEF OBUS 0.29 0.29 tblVehicleEF OBUS 0.78 0.68 tblVehicleEF OBUS 6.49 6.09 tblVehicleEF OBUS 109.50 110.73 tblVehicleEF OBUS 1,279.87 1,273.03 tblVehicleEF OBUS 69.62 68.83 tblVehicleEF OBUS 0.70 0.65 tblVehicleEF OBUS 2.31 2.05 tblVehicleEF OBUS 2.68 2.66 tblVehicleEF OBUS 3.8000e-004 3.0000e-004 tblVehicleEF OBUS 0.01 0.01 tblVehicleEF OBUS 8.0500e-004 7.8200e-004 tblVehicleEF OBUS 3.6300e-004 2.8700e-004 tblVehicleEF OBUS 0.01 9.9080e-003 tblVehicleEF OBUS 7.4200e-004 7.2000e-004 tblVehicleEF OBUS 1.5430e-003 1.4950e-003 tblVehicleEF OBUS 0.02 0.02 tblVehicleEF OBUS 0.04 0.04 tblVehicleEF OBUS 7.9200e-004 7.8100e-004 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 37 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF OBUS 0.08 0.07 tblVehicleEF OBUS 0.04 0.04 tblVehicleEF OBUS 0.41 0.38 tblVehicleEF OBUS 1.0570e-003 1.0690e-003 tblVehicleEF OBUS 0.01 0.01 tblVehicleEF OBUS 8.1000e-004 7.9500e-004 tblVehicleEF OBUS 1.5430e-003 1.4950e-003 tblVehicleEF OBUS 0.02 0.02 tblVehicleEF OBUS 0.06 0.06 tblVehicleEF OBUS 7.9200e-004 7.8100e-004 tblVehicleEF OBUS 0.10 0.09 tblVehicleEF OBUS 0.04 0.04 tblVehicleEF OBUS 0.45 0.42 tblVehicleEF OBUS 0.01 0.01 tblVehicleEF OBUS 0.01 0.01 tblVehicleEF OBUS 0.03 0.03 tblVehicleEF OBUS 0.28 0.27 tblVehicleEF OBUS 0.79 0.69 tblVehicleEF OBUS 6.13 5.75 tblVehicleEF OBUS 114.99 116.31 tblVehicleEF OBUS 1,279.87 1,273.03 tblVehicleEF OBUS 69.62 68.83 tblVehicleEF OBUS 0.72 0.67 tblVehicleEF OBUS 2.17 1.93 tblVehicleEF OBUS 2.64 2.62 tblVehicleEF OBUS 3.2000e-004 2.5300e-004 tblVehicleEF OBUS 0.01 0.01 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 38 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF OBUS 8.0500e-004 7.8200e-004 tblVehicleEF OBUS 3.0600e-004 2.4200e-004 tblVehicleEF OBUS 0.01 9.9080e-003 tblVehicleEF OBUS 7.4200e-004 7.2000e-004 tblVehicleEF OBUS 2.2630e-003 2.1920e-003 tblVehicleEF OBUS 0.02 0.02 tblVehicleEF OBUS 0.04 0.04 tblVehicleEF OBUS 1.1320e-003 1.1100e-003 tblVehicleEF OBUS 0.08 0.07 tblVehicleEF OBUS 0.04 0.04 tblVehicleEF OBUS 0.39 0.37 tblVehicleEF OBUS 1.1090e-003 1.1220e-003 tblVehicleEF OBUS 0.01 0.01 tblVehicleEF OBUS 8.0400e-004 7.9000e-004 tblVehicleEF OBUS 2.2630e-003 2.1920e-003 tblVehicleEF OBUS 0.02 0.02 tblVehicleEF OBUS 0.06 0.06 tblVehicleEF OBUS 1.1320e-003 1.1100e-003 tblVehicleEF OBUS 0.10 0.09 tblVehicleEF OBUS 0.04 0.04 tblVehicleEF OBUS 0.43 0.40 tblVehicleEF OBUS 0.01 0.01 tblVehicleEF OBUS 0.01 0.01 tblVehicleEF OBUS 0.03 0.03 tblVehicleEF OBUS 0.32 0.31 tblVehicleEF OBUS 0.78 0.68 tblVehicleEF OBUS 6.56 6.15 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 39 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF OBUS 101.91 103.03 tblVehicleEF OBUS 1,279.87 1,273.03 tblVehicleEF OBUS 69.62 68.83 tblVehicleEF OBUS 0.66 0.62 tblVehicleEF OBUS 2.26 2.02 tblVehicleEF OBUS 2.69 2.67 tblVehicleEF OBUS 4.6200e-004 3.6500e-004 tblVehicleEF OBUS 0.01 0.01 tblVehicleEF OBUS 8.0500e-004 7.8200e-004 tblVehicleEF OBUS 4.4200e-004 3.4900e-004 tblVehicleEF OBUS 0.01 9.9080e-003 tblVehicleEF OBUS 7.4200e-004 7.2000e-004 tblVehicleEF OBUS 1.6190e-003 1.5550e-003 tblVehicleEF OBUS 0.02 0.02 tblVehicleEF OBUS 0.04 0.04 tblVehicleEF OBUS 7.7700e-004 7.6300e-004 tblVehicleEF OBUS 0.08 0.07 tblVehicleEF OBUS 0.04 0.04 tblVehicleEF OBUS 0.41 0.39 tblVehicleEF OBUS 9.8500e-004 9.9500e-004 tblVehicleEF OBUS 0.01 0.01 tblVehicleEF OBUS 8.1200e-004 7.9600e-004 tblVehicleEF OBUS 1.6190e-003 1.5550e-003 tblVehicleEF OBUS 0.02 0.02 tblVehicleEF OBUS 0.06 0.06 tblVehicleEF OBUS 7.7700e-004 7.6300e-004 tblVehicleEF OBUS 0.10 0.09 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 40 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF OBUS 0.04 0.04 tblVehicleEF OBUS 0.45 0.42 tblVehicleEF SBUS 0.88 0.88 tblVehicleEF SBUS 0.02 0.01 tblVehicleEF SBUS 0.08 0.07 tblVehicleEF SBUS 7.70 7.89 tblVehicleEF SBUS 0.91 0.84 tblVehicleEF SBUS 7.81 7.67 tblVehicleEF SBUS 1,169.81 1,153.25 tblVehicleEF SBUS 1,109.01 1,098.50 tblVehicleEF SBUS 50.38 52.01 tblVehicleEF SBUS 11.36 10.62 tblVehicleEF SBUS 5.34 4.93 tblVehicleEF SBUS 13.05 12.73 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 0.03 0.03 tblVehicleEF SBUS 7.2100e-004 7.4700e-004 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 2.6990e-003 2.6880e-003 tblVehicleEF SBUS 0.03 0.03 tblVehicleEF SBUS 6.6300e-004 6.8700e-004 tblVehicleEF SBUS 3.5720e-003 3.4480e-003 tblVehicleEF SBUS 0.03 0.03 tblVehicleEF SBUS 0.93 0.96 tblVehicleEF SBUS 1.6670e-003 1.6800e-003 tblVehicleEF SBUS 0.12 0.12 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 41 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF SBUS 0.02 0.02 tblVehicleEF SBUS 0.41 0.40 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 6.3900e-004 6.5300e-004 tblVehicleEF SBUS 3.5720e-003 3.4480e-003 tblVehicleEF SBUS 0.03 0.03 tblVehicleEF SBUS 1.34 1.38 tblVehicleEF SBUS 1.6670e-003 1.6800e-003 tblVehicleEF SBUS 0.15 0.14 tblVehicleEF SBUS 0.02 0.02 tblVehicleEF SBUS 0.45 0.44 tblVehicleEF SBUS 0.88 0.88 tblVehicleEF SBUS 0.02 0.01 tblVehicleEF SBUS 0.07 0.06 tblVehicleEF SBUS 7.55 7.76 tblVehicleEF SBUS 0.92 0.86 tblVehicleEF SBUS 6.33 6.22 tblVehicleEF SBUS 1,224.54 1,206.53 tblVehicleEF SBUS 1,109.01 1,098.50 tblVehicleEF SBUS 50.38 52.01 tblVehicleEF SBUS 11.72 10.96 tblVehicleEF SBUS 5.03 4.65 tblVehicleEF SBUS 13.02 12.69 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 0.03 0.03 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 42 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF SBUS 7.2100e-004 7.4700e-004 tblVehicleEF SBUS 0.01 9.8410e-003 tblVehicleEF SBUS 2.6990e-003 2.6880e-003 tblVehicleEF SBUS 0.03 0.03 tblVehicleEF SBUS 6.6300e-004 6.8700e-004 tblVehicleEF SBUS 5.2730e-003 5.0870e-003 tblVehicleEF SBUS 0.03 0.03 tblVehicleEF SBUS 0.93 0.95 tblVehicleEF SBUS 2.4160e-003 2.4200e-003 tblVehicleEF SBUS 0.12 0.12 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 0.36 0.36 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 6.1400e-004 6.2900e-004 tblVehicleEF SBUS 5.2730e-003 5.0870e-003 tblVehicleEF SBUS 0.03 0.03 tblVehicleEF SBUS 1.34 1.37 tblVehicleEF SBUS 2.4160e-003 2.4200e-003 tblVehicleEF SBUS 0.15 0.14 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 0.40 0.39 tblVehicleEF SBUS 0.88 0.88 tblVehicleEF SBUS 0.02 0.01 tblVehicleEF SBUS 0.08 0.07 tblVehicleEF SBUS 7.89 8.07 tblVehicleEF SBUS 0.90 0.84 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 43 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF SBUS 8.06 7.93 tblVehicleEF SBUS 1,094.22 1,079.68 tblVehicleEF SBUS 1,109.01 1,098.50 tblVehicleEF SBUS 50.38 52.01 tblVehicleEF SBUS 10.86 10.15 tblVehicleEF SBUS 5.24 4.85 tblVehicleEF SBUS 13.06 12.73 tblVehicleEF SBUS 0.02 0.01 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 0.03 0.03 tblVehicleEF SBUS 7.2100e-004 7.4700e-004 tblVehicleEF SBUS 0.02 0.01 tblVehicleEF SBUS 2.6990e-003 2.6880e-003 tblVehicleEF SBUS 0.03 0.03 tblVehicleEF SBUS 6.6300e-004 6.8700e-004 tblVehicleEF SBUS 3.8290e-003 3.6280e-003 tblVehicleEF SBUS 0.03 0.03 tblVehicleEF SBUS 0.94 0.96 tblVehicleEF SBUS 1.6200e-003 1.6230e-003 tblVehicleEF SBUS 0.12 0.12 tblVehicleEF SBUS 0.02 0.02 tblVehicleEF SBUS 0.42 0.41 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 0.01 0.01 tblVehicleEF SBUS 6.4300e-004 6.5700e-004 tblVehicleEF SBUS 3.8290e-003 3.6280e-003 tblVehicleEF SBUS 0.03 0.03 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 44 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF SBUS 1.35 1.38 tblVehicleEF SBUS 1.6200e-003 1.6230e-003 tblVehicleEF SBUS 0.15 0.14 tblVehicleEF SBUS 0.02 0.02 tblVehicleEF SBUS 0.46 0.45 tblVehicleEF UBUS 3.10 2.95 tblVehicleEF UBUS 0.05 0.05 tblVehicleEF UBUS 13.06 12.36 tblVehicleEF UBUS 8.84 8.85 tblVehicleEF UBUS 2,035.51 2,008.92 tblVehicleEF UBUS 83.18 88.02 tblVehicleEF UBUS 12.52 11.49 tblVehicleEF UBUS 16.33 15.98 tblVehicleEF UBUS 0.65 0.64 tblVehicleEF UBUS 0.17 0.15 tblVehicleEF UBUS 9.4700e-004 9.7400e-004 tblVehicleEF UBUS 0.28 0.27 tblVehicleEF UBUS 0.16 0.14 tblVehicleEF UBUS 8.7200e-004 8.9600e-004 tblVehicleEF UBUS 4.2030e-003 4.1600e-003 tblVehicleEF UBUS 0.07 0.07 tblVehicleEF UBUS 2.3120e-003 2.3210e-003 tblVehicleEF UBUS 1.04 0.96 tblVehicleEF UBUS 0.02 0.02 tblVehicleEF UBUS 0.66 0.66 tblVehicleEF UBUS 0.01 0.01 tblVehicleEF UBUS 9.9100e-004 1.0390e-003 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 45 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF UBUS 4.2030e-003 4.1600e-003 tblVehicleEF UBUS 0.07 0.07 tblVehicleEF UBUS 2.3120e-003 2.3210e-003 tblVehicleEF UBUS 4.25 4.03 tblVehicleEF UBUS 0.02 0.02 tblVehicleEF UBUS 0.72 0.72 tblVehicleEF UBUS 3.10 2.95 tblVehicleEF UBUS 0.04 0.04 tblVehicleEF UBUS 13.11 12.41 tblVehicleEF UBUS 7.65 7.66 tblVehicleEF UBUS 2,035.51 2,008.92 tblVehicleEF UBUS 83.18 88.02 tblVehicleEF UBUS 11.80 10.84 tblVehicleEF UBUS 16.28 15.93 tblVehicleEF UBUS 0.65 0.64 tblVehicleEF UBUS 0.17 0.15 tblVehicleEF UBUS 9.4700e-004 9.7400e-004 tblVehicleEF UBUS 0.28 0.27 tblVehicleEF UBUS 0.16 0.14 tblVehicleEF UBUS 8.7200e-004 8.9600e-004 tblVehicleEF UBUS 5.9860e-003 5.9230e-003 tblVehicleEF UBUS 0.07 0.07 tblVehicleEF UBUS 3.1930e-003 3.1960e-003 tblVehicleEF UBUS 1.04 0.97 tblVehicleEF UBUS 0.02 0.02 tblVehicleEF UBUS 0.60 0.60 tblVehicleEF UBUS 0.01 0.01 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 46 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual tblVehicleEF UBUS 9.7000e-004 1.0190e-003 tblVehicleEF UBUS 5.9860e-003 5.9230e-003 tblVehicleEF UBUS 0.07 0.07 tblVehicleEF UBUS 3.1930e-003 3.1960e-003 tblVehicleEF UBUS 4.27 4.04 tblVehicleEF UBUS 0.02 0.02 tblVehicleEF UBUS 0.66 0.66 tblVehicleEF UBUS 3.10 2.95 tblVehicleEF UBUS 0.05 0.05 tblVehicleEF UBUS 13.05 12.34 tblVehicleEF UBUS 9.05 9.07 tblVehicleEF UBUS 2,035.51 2,008.92 tblVehicleEF UBUS 83.18 88.02 tblVehicleEF UBUS 12.28 11.27 tblVehicleEF UBUS 16.34 15.99 tblVehicleEF UBUS 0.65 0.64 tblVehicleEF UBUS 0.17 0.15 tblVehicleEF UBUS 9.4700e-004 9.7400e-004 tblVehicleEF UBUS 0.28 0.27 tblVehicleEF UBUS 0.16 0.14 tblVehicleEF UBUS 8.7200e-004 8.9600e-004 tblVehicleEF UBUS 4.8540e-003 4.7740e-003 tblVehicleEF UBUS 0.09 0.09 tblVehicleEF UBUS 2.4640e-003 2.4590e-003 tblVehicleEF UBUS 1.03 0.96 tblVehicleEF UBUS 0.02 0.03 tblVehicleEF UBUS 0.67 0.67 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 47 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 2.0 Emissions Summary tblVehicleEF UBUS 0.01 0.01 tblVehicleEF UBUS 9.9400e-004 1.0430e-003 tblVehicleEF UBUS 4.8540e-003 4.7740e-003 tblVehicleEF UBUS 0.09 0.09 tblVehicleEF UBUS 2.4640e-003 2.4590e-003 tblVehicleEF UBUS 4.25 4.02 tblVehicleEF UBUS 0.02 0.03 tblVehicleEF UBUS 0.73 0.74 tblWater IndoorWaterUseRate 1,334,780.45 1,336,557.78 tblWater OutdoorWaterUseRate 818,091.24 819,180.58 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 48 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 2.1 Overall Construction ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Year tons/yr MT/yr 2019 0.0361 4.7400e- 003 0.0108 3.0000e- 005 2.5600e- 003 4.0000e- 005 2.6100e- 003 6.8000e- 004 4.0000e- 005 7.3000e- 004 0.0000 3.0774 3.0774 1.3000e- 004 0.0000 3.0807 Maximum 0.0361 4.7400e- 003 0.0108 3.0000e- 005 2.5600e- 003 4.0000e- 005 2.6100e- 003 6.8000e- 004 4.0000e- 005 7.3000e- 004 0.0000 3.0774 3.0774 1.3000e- 004 0.0000 3.0807 Unmitigated Construction ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Year tons/yr MT/yr 2019 0.0361 4.7400e- 003 0.0108 3.0000e- 005 2.5600e- 003 4.0000e- 005 2.6100e- 003 6.8000e- 004 4.0000e- 005 7.3000e- 004 0.0000 3.0774 3.0774 1.3000e- 004 0.0000 3.0807 Maximum 0.0361 4.7400e- 003 0.0108 3.0000e- 005 2.5600e- 003 4.0000e- 005 2.6100e- 003 6.8000e- 004 4.0000e- 005 7.3000e- 004 0.0000 3.0774 3.0774 1.3000e- 004 0.0000 3.0807 Mitigated Construction ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e Percent Reduction 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 49 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 2.2 Overall Operational ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Area 0.0307 0.0000 1.0000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 1.9000e- 004 1.9000e- 004 0.0000 0.0000 2.0000e- 004 Energy 4.2000e- 004 3.8400e- 003 3.2200e- 003 2.0000e- 005 2.9000e- 004 2.9000e- 004 2.9000e- 004 2.9000e- 004 0.0000 35.2973 35.2973 1.3600e- 003 3.4000e- 004 35.4334 Mobile 0.0223 0.1143 0.3042 9.8000e- 004 0.0770 1.0200e- 003 0.0780 0.0206 9.5000e- 004 0.0216 0.0000 90.6865 90.6865 5.0800e- 003 0.0000 90.8136 Waste 0.0000 0.0000 0.0000 0.0000 1.4189 0.0000 1.4189 0.0839 0.0000 3.5153 Water 0.0000 0.0000 0.0000 0.0000 0.4240 8.4449 8.8689 0.0439 1.1000e- 003 10.2944 Total 0.0534 0.1181 0.3075 1.0000e- 003 0.0770 1.3100e- 003 0.0783 0.0206 1.2400e- 003 0.0219 1.8429 134.4288 136.2718 0.1342 1.4400e- 003 140.0568 Unmitigated Operational Quarter Start Date End Date Maximum Unmitigated ROG + NOX (tons/quarter)Maximum Mitigated ROG + NOX (tons/quarter) 1 9-2-2019 9-30-2019 0.0018 0.0018 Highest 0.0018 0.0018 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 50 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 2.2 Overall Operational ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Area 0.0307 0.0000 1.0000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 1.9000e- 004 1.9000e- 004 0.0000 0.0000 2.0000e- 004 Energy 4.2000e- 004 3.8400e- 003 3.2200e- 003 2.0000e- 005 2.9000e- 004 2.9000e- 004 2.9000e- 004 2.9000e- 004 0.0000 35.2973 35.2973 1.3600e- 003 3.4000e- 004 35.4334 Mobile 0.0156 0.0667 0.1401 3.7000e- 004 0.0264 4.0000e- 004 0.0268 7.0800e- 003 3.7000e- 004 7.4500e- 003 0.0000 34.3095 34.3095 2.2700e- 003 0.0000 34.3663 Waste 0.0000 0.0000 0.0000 0.0000 1.4189 0.0000 1.4189 0.0839 0.0000 3.5153 Water 0.0000 0.0000 0.0000 0.0000 0.4240 8.4449 8.8689 0.0439 1.1000e- 003 10.2944 Total 0.0466 0.0705 0.1434 3.9000e- 004 0.0264 6.9000e- 004 0.0271 7.0800e- 003 6.6000e- 004 7.7400e- 003 1.8429 78.0518 79.8948 0.1314 1.4400e- 003 83.6095 Mitigated Operational 3.0 Construction Detail Construction Phase Phase Number Phase Name Phase Type Start Date End Date Num Days Week Num Days Phase Description 1 Building Construction Building Construction 9/2/2019 11/29/2019 5 65 2 Paving Paving 12/2/2019 12/6/2019 5 5 3 Architectural Coating Architectural Coating 12/9/2019 12/13/2019 5 5 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e Percent Reduction 12.59 40.31 53.38 61.00 65.71 47.33 65.40 65.68 46.77 64.61 0.00 41.94 41.37 2.09 0.00 40.30 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 51 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 3.1 Mitigation Measures Construction OffRoad Equipment Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor Building Construction Cranes 0 4.00 231 0.29 Building Construction Forklifts 0 6.00 89 0.20 Building Construction Tractors/Loaders/Backhoes 0 8.00 97 0.37 Paving Cement and Mortar Mixers 0 6.00 9 0.56 Paving Pavers 0 7.00 130 0.42 Paving Rollers 0 7.00 80 0.38 Paving Tractors/Loaders/Backhoes 0 7.00 97 0.37 Architectural Coating Air Compressors 0 6.00 78 0.48 Trips and VMT Phase Name Offroad Equipment Count Worker Trip Number Vendor Trip Number Hauling Trip Number Worker Trip Length Vendor Trip Length Hauling Trip Length Worker Vehicle Class Vendor Vehicle Class Hauling Vehicle Class Building Construction 0 6.00 1.00 0.00 14.70 6.90 20.00 LD_Mix HDT_Mix HHDT Paving 0 4.00 0.00 0.00 14.70 6.90 20.00 LD_Mix HDT_Mix HHDT Architectural Coating 0 4.00 0.00 0.00 14.70 6.90 20.00 LD_Mix HDT_Mix HHDT Residential Indoor: 0; Residential Outdoor: 0; Non-Residential Indoor: 11,279; Non-Residential Outdoor: 3,760; Striped Parking Area: 0 (Architectural Coating – sqft) Acres of Grading (Site Preparation Phase): 0 Acres of Grading (Grading Phase): 0 Acres of Paving: 0 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 52 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 3.2 Building Construction - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Unmitigated Construction On-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 1.4000e- 004 3.8400e- 003 1.0500e- 003 1.0000e- 005 2.0000e- 004 2.0000e- 005 2.3000e- 004 6.0000e- 005 2.0000e- 005 8.0000e- 005 0.0000 0.8127 0.8127 5.0000e- 005 0.0000 0.8141 Worker 9.8000e- 004 8.1000e- 004 8.8500e- 003 2.0000e- 005 2.1400e- 003 2.0000e- 005 2.1600e- 003 5.7000e- 004 2.0000e- 005 5.8000e- 004 0.0000 2.0541 2.0541 7.0000e- 005 0.0000 2.0558 Total 1.1200e- 003 4.6500e- 003 9.9000e- 003 3.0000e- 005 2.3400e- 003 4.0000e- 005 2.3900e- 003 6.3000e- 004 4.0000e- 005 6.6000e- 004 0.0000 2.8668 2.8668 1.2000e- 004 0.0000 2.8699 Unmitigated Construction Off-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 53 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 3.2 Building Construction - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Mitigated Construction On-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 1.4000e- 004 3.8400e- 003 1.0500e- 003 1.0000e- 005 2.0000e- 004 2.0000e- 005 2.3000e- 004 6.0000e- 005 2.0000e- 005 8.0000e- 005 0.0000 0.8127 0.8127 5.0000e- 005 0.0000 0.8141 Worker 9.8000e- 004 8.1000e- 004 8.8500e- 003 2.0000e- 005 2.1400e- 003 2.0000e- 005 2.1600e- 003 5.7000e- 004 2.0000e- 005 5.8000e- 004 0.0000 2.0541 2.0541 7.0000e- 005 0.0000 2.0558 Total 1.1200e- 003 4.6500e- 003 9.9000e- 003 3.0000e- 005 2.3400e- 003 4.0000e- 005 2.3900e- 003 6.3000e- 004 4.0000e- 005 6.6000e- 004 0.0000 2.8668 2.8668 1.2000e- 004 0.0000 2.8699 Mitigated Construction Off-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 54 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 3.3 Paving - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Paving 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Unmitigated Construction On-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Total 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Unmitigated Construction Off-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 55 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 3.3 Paving - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Paving 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Mitigated Construction On-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Total 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Mitigated Construction Off-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 56 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 3.4 Architectural Coating - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Archit. Coating 0.0349 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0349 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Unmitigated Construction On-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Total 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Unmitigated Construction Off-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 57 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 4.0 Operational Detail - Mobile 3.4 Architectural Coating - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Archit. Coating 0.0349 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0349 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Mitigated Construction On-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Total 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Mitigated Construction Off-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 58 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Mitigated 0.0156 0.0667 0.1401 3.7000e- 004 0.0264 4.0000e- 004 0.0268 7.0800e- 003 3.7000e- 004 7.4500e- 003 0.0000 34.3095 34.3095 2.2700e- 003 0.0000 34.3663 Unmitigated 0.0223 0.1143 0.3042 9.8000e- 004 0.0770 1.0200e- 003 0.0780 0.0206 9.5000e- 004 0.0216 0.0000 90.6865 90.6865 5.0800e- 003 0.0000 90.8136 4.1 Mitigation Measures Mobile 4.2 Trip Summary Information 4.3 Trip Type Information Average Daily Trip Rate Unmitigated Mitigated Land Use Weekday Saturday Sunday Annual VMT Annual VMT General Office Building 53.39 11.91 5.08 130,660 44,816 General Office Building 26.47 5.90 2.52 64,790 22,223 General Office Building 2.98 0.66 0.28 7,289 2,500 Total 82.84 18.47 7.89 202,739 69,539 Improve Walkability Design Improve Destination Accessibility Increase Transit Accessibility Improve Pedestrian Network CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 59 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual Miles Trip %Trip Purpose % Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by General Office Building 16.60 8.40 6.90 33.00 48.00 19.00 77 19 4 General Office Building 16.60 8.40 6.90 33.00 48.00 19.00 77 19 4 General Office Building 16.60 8.40 6.90 33.00 48.00 19.00 77 19 4 5.0 Energy Detail ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Electricity Mitigated 0.0000 0.0000 0.0000 0.0000 0.0000 31.1203 31.1203 1.2800e- 003 2.7000e- 004 31.2317 Electricity Unmitigated 0.0000 0.0000 0.0000 0.0000 0.0000 31.1203 31.1203 1.2800e- 003 2.7000e- 004 31.2317 NaturalGas Mitigated 4.2000e- 004 3.8400e- 003 3.2200e- 003 2.0000e- 005 2.9000e- 004 2.9000e- 004 2.9000e- 004 2.9000e- 004 0.0000 4.1769 4.1769 8.0000e- 005 8.0000e- 005 4.2018 NaturalGas Unmitigated 4.2000e- 004 3.8400e- 003 3.2200e- 003 2.0000e- 005 2.9000e- 004 2.9000e- 004 2.9000e- 004 2.9000e- 004 0.0000 4.1769 4.1769 8.0000e- 005 8.0000e- 005 4.2018 5.1 Mitigation Measures Energy 4.4 Fleet Mix Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH General Office Building 0.547726 0.045437 0.201480 0.122768 0.016614 0.006090 0.019326 0.029174 0.002438 0.002359 0.005005 0.000677 0.000907 Historical Energy Use: N CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 60 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 5.2 Energy by Land Use - NaturalGas NaturalGa s Use ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Land Use kBTU/yr tons/yr MT/yr General Office Building 24984 1.3000e- 004 1.2200e- 003 1.0300e- 003 1.0000e- 005 9.0000e- 005 9.0000e- 005 9.0000e- 005 9.0000e- 005 0.0000 1.3332 1.3332 3.0000e- 005 2.0000e- 005 1.3412 General Office Building 2852.34 2.0000e- 005 1.4000e- 004 1.2000e- 004 0.0000 1.0000e- 005 1.0000e- 005 1.0000e- 005 1.0000e- 005 0.0000 0.1522 0.1522 0.0000 0.0000 0.1531 General Office Building 50436.4 2.7000e- 004 2.4700e- 003 2.0800e- 003 1.0000e- 005 1.9000e- 004 1.9000e- 004 1.9000e- 004 1.9000e- 004 0.0000 2.6915 2.6915 5.0000e- 005 5.0000e- 005 2.7075 Total 4.2000e- 004 3.8300e- 003 3.2300e- 003 2.0000e- 005 2.9000e- 004 2.9000e- 004 2.9000e- 004 2.9000e- 004 0.0000 4.1769 4.1769 8.0000e- 005 7.0000e- 005 4.2018 Unmitigated NaturalGa s Use ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Land Use kBTU/yr tons/yr MT/yr General Office Building 24984 1.3000e- 004 1.2200e- 003 1.0300e- 003 1.0000e- 005 9.0000e- 005 9.0000e- 005 9.0000e- 005 9.0000e- 005 0.0000 1.3332 1.3332 3.0000e- 005 2.0000e- 005 1.3412 General Office Building 2852.34 2.0000e- 005 1.4000e- 004 1.2000e- 004 0.0000 1.0000e- 005 1.0000e- 005 1.0000e- 005 1.0000e- 005 0.0000 0.1522 0.1522 0.0000 0.0000 0.1531 General Office Building 50436.4 2.7000e- 004 2.4700e- 003 2.0800e- 003 1.0000e- 005 1.9000e- 004 1.9000e- 004 1.9000e- 004 1.9000e- 004 0.0000 2.6915 2.6915 5.0000e- 005 5.0000e- 005 2.7075 Total 4.2000e- 004 3.8300e- 003 3.2300e- 003 2.0000e- 005 2.9000e- 004 2.9000e- 004 2.9000e- 004 2.9000e- 004 0.0000 4.1769 4.1769 8.0000e- 005 7.0000e- 005 4.2018 Mitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 61 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 6.0 Area Detail 5.3 Energy by Land Use - Electricity Electricity Use Total CO2 CH4 N2O CO2e Land Use kWh/yr MT/yr General Office Building 31176 9.9333 4.1000e- 004 8.0000e- 005 9.9689 General Office Building 3559.26 1.1341 5.0000e- 005 1.0000e- 005 1.1381 General Office Building 62936.5 20.0529 8.3000e- 004 1.7000e- 004 20.1247 Total 31.1203 1.2900e- 003 2.6000e- 004 31.2317 Unmitigated Electricity Use Total CO2 CH4 N2O CO2e Land Use kWh/yr MT/yr General Office Building 31176 9.9333 4.1000e- 004 8.0000e- 005 9.9689 General Office Building 3559.26 1.1341 5.0000e- 005 1.0000e- 005 1.1381 General Office Building 62936.5 20.0529 8.3000e- 004 1.7000e- 004 20.1247 Total 31.1203 1.2900e- 003 2.6000e- 004 31.2317 Mitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 62 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 6.1 Mitigation Measures Area 6.0 Area Detail ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Mitigated 0.0307 0.0000 1.0000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 1.9000e- 004 1.9000e- 004 0.0000 0.0000 2.0000e- 004 Unmitigated 0.0307 0.0000 1.0000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 1.9000e- 004 1.9000e- 004 0.0000 0.0000 2.0000e- 004 6.2 Area by SubCategory ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e SubCategory tons/yr MT/yr Architectural Coating 3.4900e- 003 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Consumer Products 0.0272 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Landscaping 1.0000e- 005 0.0000 1.0000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 1.9000e- 004 1.9000e- 004 0.0000 0.0000 2.0000e- 004 Total 0.0307 0.0000 1.0000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 1.9000e- 004 1.9000e- 004 0.0000 0.0000 2.0000e- 004 Unmitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 63 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 7.1 Mitigation Measures Water 7.0 Water Detail 6.2 Area by SubCategory ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e SubCategory tons/yr MT/yr Architectural Coating 3.4900e- 003 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Consumer Products 0.0272 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Landscaping 1.0000e- 005 0.0000 1.0000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 1.9000e- 004 1.9000e- 004 0.0000 0.0000 2.0000e- 004 Total 0.0307 0.0000 1.0000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 1.9000e- 004 1.9000e- 004 0.0000 0.0000 2.0000e- 004 Mitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 64 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual Total CO2 CH4 N2O CO2e Category MT/yr Mitigated 8.8689 0.0439 1.1000e- 003 10.2944 Unmitigated 8.8689 0.0439 1.1000e- 003 10.2944 7.2 Water by Land Use Indoor/Out door Use Total CO2 CH4 N2O CO2e Land Use Mgal MT/yr General Office Building 1.33656 / 0.819181 8.8689 0.0439 1.1000e- 003 10.2944 Total 8.8689 0.0439 1.1000e- 003 10.2944 Unmitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 65 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 8.1 Mitigation Measures Waste 7.2 Water by Land Use Indoor/Out door Use Total CO2 CH4 N2O CO2e Land Use Mgal MT/yr General Office Building 1.33656 / 0.819181 8.8689 0.0439 1.1000e- 003 10.2944 Total 8.8689 0.0439 1.1000e- 003 10.2944 Mitigated 8.0 Waste Detail Total CO2 CH4 N2O CO2e MT/yr Mitigated 1.4189 0.0839 0.0000 3.5153 Unmitigated 1.4189 0.0839 0.0000 3.5153 Category/Year CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 66 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 8.2 Waste by Land Use Waste Disposed Total CO2 CH4 N2O CO2e Land Use tons MT/yr General Office Building 6.99 1.4189 0.0839 0.0000 3.5153 Total 1.4189 0.0839 0.0000 3.5153 Unmitigated Waste Disposed Total CO2 CH4 N2O CO2e Land Use tons MT/yr General Office Building 6.99 1.4189 0.0839 0.0000 3.5153 Total 1.4189 0.0839 0.0000 3.5153 Mitigated 9.0 Operational Offroad Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 67 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual 11.0 Vegetation 10.0 Stationary Equipment Fire Pumps and Emergency Generators Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type Boilers Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type User Defined Equipment Equipment Type Number CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:45 AMPage 68 of 68 Rives Mansion Conversion - Offices - Los Angeles-South Coast County, Annual Project Characteristics - Land Use - Construction Phase - Sequestration - Construction Off-road Equipment Mitigation - Mobile Land Use Mitigation - 1.1 Land Usage Land Uses Size Metric Lot Acreage Floor Surface Area Population High Turnover (Sit Down Restaurant)1.20 1000sqft 0.03 1,200.00 0 1.2 Other Project Characteristics Urbanization Climate Zone Urban 9 Wind Speed (m/s)Precipitation Freq (Days)2.2 33 1.3 User Entered Comments & Non-Default Data 1.0 Project Characteristics Utility Company Southern California Edison 2020Operational Year CO2 Intensity (lb/MWhr) 702.44 0.029CH4 Intensity (lb/MWhr) 0.006N2O Intensity (lb/MWhr) Table Name Column Name Default Value New Value tblConstDustMitigation WaterUnpavedRoadVehicleSpeed 0 15 tblSequestration NumberOfNewTrees 0.00 37.00 Rives Mansion Conversion - Retail Los Angeles-South Coast County, Annual CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 1 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 2.0 Emissions Summary 2.1 Overall Construction ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Year tons/yr MT/yr 2019 0.0418 0.4258 0.3291 5.0000e- 004 1.6200e- 003 0.0262 0.0278 6.0000e- 004 0.0241 0.0247 0.0000 45.0301 45.0301 0.0140 0.0000 45.3789 2020 0.0152 0.0933 0.0836 1.3000e- 004 5.8000e- 004 5.4500e- 003 6.0300e- 003 1.5000e- 004 5.0400e- 003 5.2000e- 003 0.0000 11.5327 11.5327 3.3400e- 003 0.0000 11.6162 Maximum 0.0418 0.4258 0.3291 5.0000e- 004 1.6200e- 003 0.0262 0.0278 6.0000e- 004 0.0241 0.0247 0.0000 45.0301 45.0301 0.0140 0.0000 45.3789 Unmitigated Construction ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Year tons/yr MT/yr 2019 0.0418 0.4258 0.3291 5.0000e- 004 9.9000e- 004 0.0262 0.0272 3.3000e- 004 0.0241 0.0244 0.0000 45.0300 45.0300 0.0140 0.0000 45.3789 2020 0.0152 0.0933 0.0836 1.3000e- 004 5.8000e- 004 5.4500e- 003 6.0300e- 003 1.5000e- 004 5.0400e- 003 5.2000e- 003 0.0000 11.5327 11.5327 3.3400e- 003 0.0000 11.6162 Maximum 0.0418 0.4258 0.3291 5.0000e- 004 9.9000e- 004 0.0262 0.0272 3.3000e- 004 0.0241 0.0244 0.0000 45.0300 45.0300 0.0140 0.0000 45.3789 Mitigated Construction CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 2 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 2.2 Overall Operational ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Area 4.8900e- 003 0.0000 2.0000e- 005 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 3.0000e- 005 3.0000e- 005 0.0000 0.0000 3.0000e- 005 Energy 1.4900e- 003 0.0136 0.0114 8.0000e- 005 1.0300e- 003 1.0300e- 003 1.0300e- 003 1.0300e- 003 0.0000 31.6538 31.6538 9.8000e- 004 4.2000e- 004 31.8020 Mobile 0.0413 0.1827 0.4037 1.1300e- 003 0.0821 1.2000e- 003 0.0833 0.0220 1.1200e- 003 0.0231 0.0000 103.8629 103.8629 6.5900e- 003 0.0000 104.0276 Waste 0.0000 0.0000 0.0000 0.0000 2.8987 0.0000 2.8987 0.1713 0.0000 7.1814 Water 0.0000 0.0000 0.0000 0.0000 0.1156 1.5935 1.7090 0.0119 2.9000e- 004 2.0949 Total 0.0477 0.1963 0.4152 1.2100e- 003 0.0821 2.2300e- 003 0.0843 0.0220 2.1500e- 003 0.0242 3.0143 137.1102 140.1244 0.1908 7.1000e- 004 145.1061 Unmitigated Operational ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e Percent Reduction 0.00 0.00 0.00 0.00 28.64 0.00 1.83 36.00 0.00 0.90 0.00 0.00 0.00 0.00 0.00 0.00 Quarter Start Date End Date Maximum Unmitigated ROG + NOX (tons/quarter)Maximum Mitigated ROG + NOX (tons/quarter) 1 9-2-2019 12-1-2019 0.3494 0.3494 2 12-2-2019 3-1-2020 0.2227 0.2227 Highest 0.3494 0.3494 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 3 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 2.2 Overall Operational ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Area 4.8900e- 003 0.0000 2.0000e- 005 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 3.0000e- 005 3.0000e- 005 0.0000 0.0000 3.0000e- 005 Energy 1.4900e- 003 0.0136 0.0114 8.0000e- 005 1.0300e- 003 1.0300e- 003 1.0300e- 003 1.0300e- 003 0.0000 31.6538 31.6538 9.8000e- 004 4.2000e- 004 31.8020 Mobile 0.0341 0.1319 0.2286 4.7000e- 004 0.0282 5.3000e- 004 0.0287 7.5500e- 003 5.0000e- 004 8.0500e- 003 0.0000 43.7064 43.7064 3.5900e- 003 0.0000 43.7961 Waste 0.0000 0.0000 0.0000 0.0000 2.8987 0.0000 2.8987 0.1713 0.0000 7.1814 Water 0.0000 0.0000 0.0000 0.0000 0.1156 1.5935 1.7090 0.0119 2.9000e- 004 2.0949 Total 0.0405 0.1455 0.2400 5.5000e- 004 0.0282 1.5600e- 003 0.0297 7.5500e- 003 1.5300e- 003 9.0800e- 003 3.0143 76.9537 79.9679 0.1878 7.1000e- 004 84.8745 Mitigated Operational ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e Percent Reduction 15.05 25.87 42.19 54.55 65.70 30.04 64.75 65.70 28.84 62.42 0.00 43.87 42.93 1.57 0.00 41.51 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 4 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.0 Construction Detail 2.3 Vegetation CO2e Category MT New Trees 26.1960 Total 26.1960 Vegetation Construction Phase Phase Number Phase Name Phase Type Start Date End Date Num Days Week Num Days Phase Description 1 Site Preparation Site Preparation 9/2/2019 9/2/2019 5 1 2 Grading Grading 9/3/2019 9/4/2019 5 2 3 Building Construction Building Construction 9/5/2019 1/22/2020 5 100 4 Paving Paving 1/23/2020 1/29/2020 5 5 5 Architectural Coating Architectural Coating 1/30/2020 2/5/2020 5 5 Acres of Grading (Site Preparation Phase): 0.5 Acres of Grading (Grading Phase): 0 Acres of Paving: 0 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 5 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual OffRoad Equipment Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor Site Preparation Graders 1 8.00 187 0.41 Site Preparation Tractors/Loaders/Backhoes 1 8.00 97 0.37 Grading Concrete/Industrial Saws 1 8.00 81 0.73 Grading Rubber Tired Dozers 1 1.00 247 0.40 Grading Tractors/Loaders/Backhoes 2 6.00 97 0.37 Building Construction Cranes 1 4.00 231 0.29 Building Construction Forklifts 2 6.00 89 0.20 Building Construction Tractors/Loaders/Backhoes 2 8.00 97 0.37 Paving Cement and Mortar Mixers 4 6.00 9 0.56 Paving Pavers 1 7.00 130 0.42 Paving Rollers 1 7.00 80 0.38 Paving Tractors/Loaders/Backhoes 1 7.00 97 0.37 Architectural Coating Air Compressors 1 6.00 78 0.48 Trips and VMT Phase Name Offroad Equipment Count Worker Trip Number Vendor Trip Number Hauling Trip Number Worker Trip Length Vendor Trip Length Hauling Trip Length Worker Vehicle Class Vendor Vehicle Class Hauling Vehicle Class Site Preparation 2 5.00 0.00 0.00 14.70 6.90 20.00 LD_Mix HDT_Mix HHDT Grading 4 10.00 0.00 0.00 14.70 6.90 20.00 LD_Mix HDT_Mix HHDT Building Construction 5 1.00 0.00 0.00 14.70 6.90 20.00 LD_Mix HDT_Mix HHDT Paving 7 18.00 0.00 0.00 14.70 6.90 20.00 LD_Mix HDT_Mix HHDT Architectural Coating 1 0.00 0.00 0.00 14.70 6.90 20.00 LD_Mix HDT_Mix HHDT Residential Indoor: 0; Residential Outdoor: 0; Non-Residential Indoor: 1,800; Non-Residential Outdoor: 600; Striped Parking Area: 0 (Architectural Coating – sqft) CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 6 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.2 Site Preparation - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Fugitive Dust 2.7000e- 004 0.0000 2.7000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Off-Road 3.6000e- 004 4.4600e- 003 2.0700e- 003 0.0000 1.8000e- 004 1.8000e- 004 1.7000e- 004 1.7000e- 004 0.0000 0.4378 0.4378 1.4000e- 004 0.0000 0.4413 Total 3.6000e- 004 4.4600e- 003 2.0700e- 003 0.0000 2.7000e- 004 1.8000e- 004 4.5000e- 004 3.0000e- 005 1.7000e- 004 2.0000e- 004 0.0000 0.4378 0.4378 1.4000e- 004 0.0000 0.4413 Unmitigated Construction On-Site 3.1 Mitigation Measures Construction Water Exposed Area Reduce Vehicle Speed on Unpaved Roads CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 7 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.2 Site Preparation - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 1.0000e- 005 1.0000e- 005 1.1000e- 004 0.0000 3.0000e- 005 0.0000 3.0000e- 005 1.0000e- 005 0.0000 1.0000e- 005 0.0000 0.0263 0.0263 0.0000 0.0000 0.0264 Total 1.0000e- 005 1.0000e- 005 1.1000e- 004 0.0000 3.0000e- 005 0.0000 3.0000e- 005 1.0000e- 005 0.0000 1.0000e- 005 0.0000 0.0263 0.0263 0.0000 0.0000 0.0264 Unmitigated Construction Off-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Fugitive Dust 1.0000e- 004 0.0000 1.0000e- 004 1.0000e- 005 0.0000 1.0000e- 005 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Off-Road 3.6000e- 004 4.4600e- 003 2.0700e- 003 0.0000 1.8000e- 004 1.8000e- 004 1.7000e- 004 1.7000e- 004 0.0000 0.4378 0.4378 1.4000e- 004 0.0000 0.4413 Total 3.6000e- 004 4.4600e- 003 2.0700e- 003 0.0000 1.0000e- 004 1.8000e- 004 2.8000e- 004 1.0000e- 005 1.7000e- 004 1.8000e- 004 0.0000 0.4378 0.4378 1.4000e- 004 0.0000 0.4413 Mitigated Construction On-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 8 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.2 Site Preparation - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 1.0000e- 005 1.0000e- 005 1.1000e- 004 0.0000 3.0000e- 005 0.0000 3.0000e- 005 1.0000e- 005 0.0000 1.0000e- 005 0.0000 0.0263 0.0263 0.0000 0.0000 0.0264 Total 1.0000e- 005 1.0000e- 005 1.1000e- 004 0.0000 3.0000e- 005 0.0000 3.0000e- 005 1.0000e- 005 0.0000 1.0000e- 005 0.0000 0.0263 0.0263 0.0000 0.0000 0.0264 Mitigated Construction Off-Site 3.3 Grading - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Fugitive Dust 7.5000e- 004 0.0000 7.5000e- 004 4.1000e- 004 0.0000 4.1000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Off-Road 9.5000e- 004 8.6000e- 003 7.6900e- 003 1.0000e- 005 5.4000e- 004 5.4000e- 004 5.1000e- 004 5.1000e- 004 0.0000 1.0520 1.0520 2.0000e- 004 0.0000 1.0570 Total 9.5000e- 004 8.6000e- 003 7.6900e- 003 1.0000e- 005 7.5000e- 004 5.4000e- 004 1.2900e- 003 4.1000e- 004 5.1000e- 004 9.2000e- 004 0.0000 1.0520 1.0520 2.0000e- 004 0.0000 1.0570 Unmitigated Construction On-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 9 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.3 Grading - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Total 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Unmitigated Construction Off-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Fugitive Dust 2.9000e- 004 0.0000 2.9000e- 004 1.6000e- 004 0.0000 1.6000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Off-Road 9.5000e- 004 8.6000e- 003 7.6900e- 003 1.0000e- 005 5.4000e- 004 5.4000e- 004 5.1000e- 004 5.1000e- 004 0.0000 1.0520 1.0520 2.0000e- 004 0.0000 1.0570 Total 9.5000e- 004 8.6000e- 003 7.6900e- 003 1.0000e- 005 2.9000e- 004 5.4000e- 004 8.3000e- 004 1.6000e- 004 5.1000e- 004 6.7000e- 004 0.0000 1.0520 1.0520 2.0000e- 004 0.0000 1.0570 Mitigated Construction On-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 10 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.3 Grading - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Total 5.0000e- 005 4.0000e- 005 4.5000e- 004 0.0000 1.1000e- 004 0.0000 1.1000e- 004 3.0000e- 005 0.0000 3.0000e- 005 0.0000 0.1053 0.1053 0.0000 0.0000 0.1054 Mitigated Construction Off-Site 3.4 Building Construction - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Off-Road 0.0402 0.4125 0.3168 4.8000e- 004 0.0254 0.0254 0.0234 0.0234 0.0000 42.9662 42.9662 0.0136 0.0000 43.3061 Total 0.0402 0.4125 0.3168 4.8000e- 004 0.0254 0.0254 0.0234 0.0234 0.0000 42.9662 42.9662 0.0136 0.0000 43.3061 Unmitigated Construction On-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 11 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.4 Building Construction - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 2.1000e- 004 1.8000e- 004 1.9100e- 003 0.0000 4.6000e- 004 0.0000 4.6000e- 004 1.2000e- 004 0.0000 1.3000e- 004 0.0000 0.4424 0.4424 2.0000e- 005 0.0000 0.4428 Total 2.1000e- 004 1.8000e- 004 1.9100e- 003 0.0000 4.6000e- 004 0.0000 4.6000e- 004 1.2000e- 004 0.0000 1.3000e- 004 0.0000 0.4424 0.4424 2.0000e- 005 0.0000 0.4428 Unmitigated Construction Off-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Off-Road 0.0402 0.4125 0.3168 4.8000e- 004 0.0254 0.0254 0.0234 0.0234 0.0000 42.9661 42.9661 0.0136 0.0000 43.3060 Total 0.0402 0.4125 0.3168 4.8000e- 004 0.0254 0.0254 0.0234 0.0234 0.0000 42.9661 42.9661 0.0136 0.0000 43.3060 Mitigated Construction On-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 12 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.4 Building Construction - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 2.1000e- 004 1.8000e- 004 1.9100e- 003 0.0000 4.6000e- 004 0.0000 4.6000e- 004 1.2000e- 004 0.0000 1.3000e- 004 0.0000 0.4424 0.4424 2.0000e- 005 0.0000 0.4428 Total 2.1000e- 004 1.8000e- 004 1.9100e- 003 0.0000 4.6000e- 004 0.0000 4.6000e- 004 1.2000e- 004 0.0000 1.3000e- 004 0.0000 0.4424 0.4424 2.0000e- 005 0.0000 0.4428 Mitigated Construction Off-Site 3.4 Building Construction - 2020 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Off-Road 6.8900e- 003 0.0708 0.0591 9.0000e- 005 4.1800e- 003 4.1800e- 003 3.8400e- 003 3.8400e- 003 0.0000 8.0048 8.0048 2.5900e- 003 0.0000 8.0696 Total 6.8900e- 003 0.0708 0.0591 9.0000e- 005 4.1800e- 003 4.1800e- 003 3.8400e- 003 3.8400e- 003 0.0000 8.0048 8.0048 2.5900e- 003 0.0000 8.0696 Unmitigated Construction On-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 13 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.4 Building Construction - 2020 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 4.0000e- 005 3.0000e- 005 3.3000e- 004 0.0000 9.0000e- 005 0.0000 9.0000e- 005 2.0000e- 005 0.0000 2.0000e- 005 0.0000 0.0817 0.0817 0.0000 0.0000 0.0818 Total 4.0000e- 005 3.0000e- 005 3.3000e- 004 0.0000 9.0000e- 005 0.0000 9.0000e- 005 2.0000e- 005 0.0000 2.0000e- 005 0.0000 0.0817 0.0817 0.0000 0.0000 0.0818 Unmitigated Construction Off-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Off-Road 6.8900e- 003 0.0708 0.0591 9.0000e- 005 4.1800e- 003 4.1800e- 003 3.8400e- 003 3.8400e- 003 0.0000 8.0048 8.0048 2.5900e- 003 0.0000 8.0696 Total 6.8900e- 003 0.0708 0.0591 9.0000e- 005 4.1800e- 003 4.1800e- 003 3.8400e- 003 3.8400e- 003 0.0000 8.0048 8.0048 2.5900e- 003 0.0000 8.0696 Mitigated Construction On-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 14 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.4 Building Construction - 2020 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 4.0000e- 005 3.0000e- 005 3.3000e- 004 0.0000 9.0000e- 005 0.0000 9.0000e- 005 2.0000e- 005 0.0000 2.0000e- 005 0.0000 0.0817 0.0817 0.0000 0.0000 0.0818 Total 4.0000e- 005 3.0000e- 005 3.3000e- 004 0.0000 9.0000e- 005 0.0000 9.0000e- 005 2.0000e- 005 0.0000 2.0000e- 005 0.0000 0.0817 0.0817 0.0000 0.0000 0.0818 Mitigated Construction Off-Site 3.5 Paving - 2020 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Off-Road 1.9300e- 003 0.0181 0.0178 3.0000e- 005 9.9000e- 004 9.9000e- 004 9.2000e- 004 9.2000e- 004 0.0000 2.3482 2.3482 6.8000e- 004 0.0000 2.3653 Paving 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 1.9300e- 003 0.0181 0.0178 3.0000e- 005 9.9000e- 004 9.9000e- 004 9.2000e- 004 9.2000e- 004 0.0000 2.3482 2.3482 6.8000e- 004 0.0000 2.3653 Unmitigated Construction On-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 15 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.5 Paving - 2020 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 2.1000e- 004 1.7000e- 004 1.8500e- 003 1.0000e- 005 4.9000e- 004 0.0000 5.0000e- 004 1.3000e- 004 0.0000 1.3000e- 004 0.0000 0.4596 0.4596 1.0000e- 005 0.0000 0.4600 Total 2.1000e- 004 1.7000e- 004 1.8500e- 003 1.0000e- 005 4.9000e- 004 0.0000 5.0000e- 004 1.3000e- 004 0.0000 1.3000e- 004 0.0000 0.4596 0.4596 1.0000e- 005 0.0000 0.4600 Unmitigated Construction Off-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Off-Road 1.9300e- 003 0.0181 0.0178 3.0000e- 005 9.9000e- 004 9.9000e- 004 9.2000e- 004 9.2000e- 004 0.0000 2.3482 2.3482 6.8000e- 004 0.0000 2.3653 Paving 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 1.9300e- 003 0.0181 0.0178 3.0000e- 005 9.9000e- 004 9.9000e- 004 9.2000e- 004 9.2000e- 004 0.0000 2.3482 2.3482 6.8000e- 004 0.0000 2.3653 Mitigated Construction On-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 16 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.5 Paving - 2020 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 2.1000e- 004 1.7000e- 004 1.8500e- 003 1.0000e- 005 4.9000e- 004 0.0000 5.0000e- 004 1.3000e- 004 0.0000 1.3000e- 004 0.0000 0.4596 0.4596 1.0000e- 005 0.0000 0.4600 Total 2.1000e- 004 1.7000e- 004 1.8500e- 003 1.0000e- 005 4.9000e- 004 0.0000 5.0000e- 004 1.3000e- 004 0.0000 1.3000e- 004 0.0000 0.4596 0.4596 1.0000e- 005 0.0000 0.4600 Mitigated Construction Off-Site 3.6 Architectural Coating - 2020 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Archit. Coating 5.5600e- 003 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Off-Road 6.1000e- 004 4.2100e- 003 4.5800e- 003 1.0000e- 005 2.8000e- 004 2.8000e- 004 2.8000e- 004 2.8000e- 004 0.0000 0.6383 0.6383 5.0000e- 005 0.0000 0.6396 Total 6.1700e- 003 4.2100e- 003 4.5800e- 003 1.0000e- 005 2.8000e- 004 2.8000e- 004 2.8000e- 004 2.8000e- 004 0.0000 0.6383 0.6383 5.0000e- 005 0.0000 0.6396 Unmitigated Construction On-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 17 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 3.6 Architectural Coating - 2020 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Unmitigated Construction Off-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Archit. Coating 5.5600e- 003 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Off-Road 6.1000e- 004 4.2100e- 003 4.5800e- 003 1.0000e- 005 2.8000e- 004 2.8000e- 004 2.8000e- 004 2.8000e- 004 0.0000 0.6383 0.6383 5.0000e- 005 0.0000 0.6396 Total 6.1700e- 003 4.2100e- 003 4.5800e- 003 1.0000e- 005 2.8000e- 004 2.8000e- 004 2.8000e- 004 2.8000e- 004 0.0000 0.6383 0.6383 5.0000e- 005 0.0000 0.6396 Mitigated Construction On-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 18 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 4.0 Operational Detail - Mobile 4.1 Mitigation Measures Mobile Improve Walkability Design Improve Destination Accessibility Increase Transit Accessibility Improve Pedestrian Network 3.6 Architectural Coating - 2020 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Mitigated Construction Off-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 19 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Mitigated 0.0341 0.1319 0.2286 4.7000e- 004 0.0282 5.3000e- 004 0.0287 7.5500e- 003 5.0000e- 004 8.0500e- 003 0.0000 43.7064 43.7064 3.5900e- 003 0.0000 43.7961 Unmitigated 0.0413 0.1827 0.4037 1.1300e- 003 0.0821 1.2000e- 003 0.0833 0.0220 1.1200e- 003 0.0231 0.0000 103.8629 103.8629 6.5900e- 003 0.0000 104.0276 4.2 Trip Summary Information 4.3 Trip Type Information Average Daily Trip Rate Unmitigated Mitigated Land Use Weekday Saturday Sunday Annual VMT Annual VMT High Turnover (Sit Down Restaurant)152.58 190.04 158.21 216,330 74,201 Total 152.58 190.04 158.21 216,330 74,201 Miles Trip %Trip Purpose % Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by High Turnover (Sit Down Restaurant) 16.60 8.40 6.90 8.50 72.50 19.00 37 20 43 5.0 Energy Detail 4.4 Fleet Mix Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH High Turnover (Sit Down Restaurant) 0.547726 0.045437 0.201480 0.122768 0.016614 0.006090 0.019326 0.029174 0.002438 0.002359 0.005005 0.000677 0.000907 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 20 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Electricity Mitigated 0.0000 0.0000 0.0000 0.0000 0.0000 16.8767 16.8767 7.0000e- 004 1.4000e- 004 16.9371 Electricity Unmitigated 0.0000 0.0000 0.0000 0.0000 0.0000 16.8767 16.8767 7.0000e- 004 1.4000e- 004 16.9371 NaturalGas Mitigated 1.4900e- 003 0.0136 0.0114 8.0000e- 005 1.0300e- 003 1.0300e- 003 1.0300e- 003 1.0300e- 003 0.0000 14.7771 14.7771 2.8000e- 004 2.7000e- 004 14.8649 NaturalGas Unmitigated 1.4900e- 003 0.0136 0.0114 8.0000e- 005 1.0300e- 003 1.0300e- 003 1.0300e- 003 1.0300e- 003 0.0000 14.7771 14.7771 2.8000e- 004 2.7000e- 004 14.8649 5.1 Mitigation Measures Energy Historical Energy Use: N CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 21 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 5.2 Energy by Land Use - NaturalGas NaturalGa s Use ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Land Use kBTU/yr tons/yr MT/yr High Turnover (Sit Down Restaurant) 276912 1.4900e- 003 0.0136 0.0114 8.0000e- 005 1.0300e- 003 1.0300e- 003 1.0300e- 003 1.0300e- 003 0.0000 14.7771 14.7771 2.8000e- 004 2.7000e- 004 14.8649 Total 1.4900e- 003 0.0136 0.0114 8.0000e- 005 1.0300e- 003 1.0300e- 003 1.0300e- 003 1.0300e- 003 0.0000 14.7771 14.7771 2.8000e- 004 2.7000e- 004 14.8649 Unmitigated NaturalGa s Use ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Land Use kBTU/yr tons/yr MT/yr High Turnover (Sit Down Restaurant) 276912 1.4900e- 003 0.0136 0.0114 8.0000e- 005 1.0300e- 003 1.0300e- 003 1.0300e- 003 1.0300e- 003 0.0000 14.7771 14.7771 2.8000e- 004 2.7000e- 004 14.8649 Total 1.4900e- 003 0.0136 0.0114 8.0000e- 005 1.0300e- 003 1.0300e- 003 1.0300e- 003 1.0300e- 003 0.0000 14.7771 14.7771 2.8000e- 004 2.7000e- 004 14.8649 Mitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 22 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 6.1 Mitigation Measures Area 6.0 Area Detail 5.3 Energy by Land Use - Electricity Electricity Use Total CO2 CH4 N2O CO2e Land Use kWh/yr MT/yr High Turnover (Sit Down Restaurant) 52968 16.8767 7.0000e- 004 1.4000e- 004 16.9371 Total 16.8767 7.0000e- 004 1.4000e- 004 16.9371 Unmitigated Electricity Use Total CO2 CH4 N2O CO2e Land Use kWh/yr MT/yr High Turnover (Sit Down Restaurant) 52968 16.8767 7.0000e- 004 1.4000e- 004 16.9371 Total 16.8767 7.0000e- 004 1.4000e- 004 16.9371 Mitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 23 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Mitigated 4.8900e- 003 0.0000 2.0000e- 005 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 3.0000e- 005 3.0000e- 005 0.0000 0.0000 3.0000e- 005 Unmitigated 4.8900e- 003 0.0000 2.0000e- 005 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 3.0000e- 005 3.0000e- 005 0.0000 0.0000 3.0000e- 005 6.2 Area by SubCategory ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e SubCategory tons/yr MT/yr Architectural Coating 5.6000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Consumer Products 4.3400e- 003 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Landscaping 0.0000 0.0000 2.0000e- 005 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 3.0000e- 005 3.0000e- 005 0.0000 0.0000 3.0000e- 005 Total 4.9000e- 003 0.0000 2.0000e- 005 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 3.0000e- 005 3.0000e- 005 0.0000 0.0000 3.0000e- 005 Unmitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 24 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 7.1 Mitigation Measures Water 7.0 Water Detail 6.2 Area by SubCategory ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e SubCategory tons/yr MT/yr Architectural Coating 5.6000e- 004 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Consumer Products 4.3400e- 003 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Landscaping 0.0000 0.0000 2.0000e- 005 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 3.0000e- 005 3.0000e- 005 0.0000 0.0000 3.0000e- 005 Total 4.9000e- 003 0.0000 2.0000e- 005 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 3.0000e- 005 3.0000e- 005 0.0000 0.0000 3.0000e- 005 Mitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 25 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual Total CO2 CH4 N2O CO2e Category MT/yr Mitigated 1.7090 0.0119 2.9000e- 004 2.0949 Unmitigated 1.7090 0.0119 2.9000e- 004 2.0949 7.2 Water by Land Use Indoor/Out door Use Total CO2 CH4 N2O CO2e Land Use Mgal MT/yr High Turnover (Sit Down Restaurant) 0.36424 / 0.0232494 1.7090 0.0119 2.9000e- 004 2.0949 Total 1.7090 0.0119 2.9000e- 004 2.0949 Unmitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 26 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 8.1 Mitigation Measures Waste 7.2 Water by Land Use Indoor/Out door Use Total CO2 CH4 N2O CO2e Land Use Mgal MT/yr High Turnover (Sit Down Restaurant) 0.36424 / 0.0232494 1.7090 0.0119 2.9000e- 004 2.0949 Total 1.7090 0.0119 2.9000e- 004 2.0949 Mitigated 8.0 Waste Detail Total CO2 CH4 N2O CO2e MT/yr Mitigated 2.8987 0.1713 0.0000 7.1814 Unmitigated 2.8987 0.1713 0.0000 7.1814 Category/Year CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 27 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 8.2 Waste by Land Use Waste Disposed Total CO2 CH4 N2O CO2e Land Use tons MT/yr High Turnover (Sit Down Restaurant) 14.28 2.8987 0.1713 0.0000 7.1814 Total 2.8987 0.1713 0.0000 7.1814 Unmitigated Waste Disposed Total CO2 CH4 N2O CO2e Land Use tons MT/yr High Turnover (Sit Down Restaurant) 14.28 2.8987 0.1713 0.0000 7.1814 Total 2.8987 0.1713 0.0000 7.1814 Mitigated 9.0 Operational Offroad Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 28 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual 11.0 Vegetation 10.0 Stationary Equipment Fire Pumps and Emergency Generators Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type Boilers Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type User Defined Equipment Equipment Type Number CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 29 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual Total CO2 CH4 N2O CO2e Category MT Unmitigated 26.1960 0.0000 0.0000 26.1960 11.2 Net New Trees Number of Trees Total CO2 CH4 N2O CO2e MT Miscellaneous 37 26.1960 0.0000 0.0000 26.1960 Total 26.1960 0.0000 0.0000 26.1960 Species Class CalEEMod Version: CalEEMod.2016.3.2 Date: 3/27/2019 11:21 AMPage 30 of 30 Rives Mansion Conversion - Retail - Los Angeles-South Coast County, Annual Project Characteristics - Land Use - Main Builiding (Apartment Mid Rise) is 4,845 square feet = 0.11 acres Carriage House (Apartment Low Rise) is 1,200 square feet = 0.03 acres Demolition - Grading - test Construction Phase - Not counting construction emissions Off-road Equipment - No construction emissions Trips and VMT - No construction emissions 1.1 Land Usage Land Uses Size Metric Lot Acreage Floor Surface Area Population Apartments Mid Rise 5.00 Dwelling Unit 0.11 4,845.00 14 Apartments Low Rise 2.00 Dwelling Unit 0.03 1,200.00 6 1.2 Other Project Characteristics Urbanization Climate Zone Urban 9 Wind Speed (m/s)Precipitation Freq (Days)2.2 33 1.3 User Entered Comments & Non-Default Data 1.0 Project Characteristics Utility Company Southern California Edison 2019Operational Year CO2 Intensity (lb/MWhr) 702.44 0.029CH4 Intensity (lb/MWhr) 0.006N2O Intensity (lb/MWhr) Rives Mansion Current Los Angeles-South Coast County, Annual CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 1 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 2.0 Emissions Summary Table Name Column Name Default Value New Value tblConstructionPhase NumDays 5.00 1.00 tblConstructionPhase PhaseStartDate 6/14/2019 6/20/2019 tblLandUse LandUseSquareFeet 5,000.00 4,845.00 tblLandUse LandUseSquareFeet 2,000.00 1,200.00 tblLandUse LotAcreage 0.13 0.11 tblLandUse LotAcreage 0.13 0.03 tblOffRoadEquipment OffRoadEquipmentUnitAmount 1.00 0.00 tblTripsAndVMT WorkerTripNumber 1.00 0.00 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 2 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 2.1 Overall Construction ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Year tons/yr MT/yr 2019 0.0189 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Maximum 0.0189 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Unmitigated Construction ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Year tons/yr MT/yr 2019 0.0189 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Maximum 0.0189 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Mitigated Construction ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e Percent Reduction 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 3 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 2.2 Overall Operational ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Area 0.0489 2.6600e- 003 0.1170 1.2000e- 004 7.0800e- 003 7.0800e- 003 7.0800e- 003 7.0800e- 003 0.7435 1.5467 2.2903 2.3300e- 003 5.0000e- 005 2.3636 Energy 5.4000e- 004 4.5900e- 003 1.9500e- 003 3.0000e- 005 3.7000e- 004 3.7000e- 004 3.7000e- 004 3.7000e- 004 0.0000 14.4696 14.4696 4.8000e- 004 1.8000e- 004 14.5339 Mobile 0.0182 0.0931 0.2536 7.7000e- 004 0.0593 9.0000e- 004 0.0602 0.0159 8.5000e- 004 0.0167 0.0000 71.2527 71.2527 4.1800e- 003 0.0000 71.3573 Waste 0.0000 0.0000 0.0000 0.0000 0.6536 0.0000 0.6536 0.0386 0.0000 1.6193 Water 0.0000 0.0000 0.0000 0.0000 0.1447 2.9100 3.0547 0.0150 3.8000e- 004 3.5412 Total 0.0676 0.1004 0.3726 9.2000e- 004 0.0593 8.3500e- 003 0.0676 0.0159 8.3000e- 003 0.0242 1.5419 90.1790 91.7209 0.0606 6.1000e- 004 93.4153 Unmitigated Operational Quarter Start Date End Date Maximum Unmitigated ROG + NOX (tons/quarter)Maximum Mitigated ROG + NOX (tons/quarter) 2 4-1-2019 6-30-2019 0.0135 0.0135 Highest 0.0135 0.0135 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 4 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 2.2 Overall Operational ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Area 0.0489 2.6600e- 003 0.1170 1.2000e- 004 7.0800e- 003 7.0800e- 003 7.0800e- 003 7.0800e- 003 0.7435 1.5467 2.2903 2.3300e- 003 5.0000e- 005 2.3636 Energy 5.4000e- 004 4.5900e- 003 1.9500e- 003 3.0000e- 005 3.7000e- 004 3.7000e- 004 3.7000e- 004 3.7000e- 004 0.0000 14.4696 14.4696 4.8000e- 004 1.8000e- 004 14.5339 Mobile 0.0182 0.0931 0.2536 7.7000e- 004 0.0593 9.0000e- 004 0.0602 0.0159 8.5000e- 004 0.0167 0.0000 71.2527 71.2527 4.1800e- 003 0.0000 71.3573 Waste 0.0000 0.0000 0.0000 0.0000 0.6536 0.0000 0.6536 0.0386 0.0000 1.6193 Water 0.0000 0.0000 0.0000 0.0000 0.1447 2.9100 3.0547 0.0150 3.8000e- 004 3.5412 Total 0.0676 0.1004 0.3726 9.2000e- 004 0.0593 8.3500e- 003 0.0676 0.0159 8.3000e- 003 0.0242 1.5419 90.1790 91.7209 0.0606 6.1000e- 004 93.4153 Mitigated Operational 3.0 Construction Detail Construction Phase Phase Number Phase Name Phase Type Start Date End Date Num Days Week Num Days Phase Description 1 Architectural Coating Architectural Coating 6/20/2019 6/20/2019 5 1 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio-CO2 Total CO2 CH4 N20 CO2e Percent Reduction 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Acres of Grading (Site Preparation Phase): 0 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 5 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 3.1 Mitigation Measures Construction OffRoad Equipment Phase Name Offroad Equipment Type Amount Usage Hours Horse Power Load Factor Architectural Coating Air Compressors 0 6.00 78 0.48 Trips and VMT Phase Name Offroad Equipment Count Worker Trip Number Vendor Trip Number Hauling Trip Number Worker Trip Length Vendor Trip Length Hauling Trip Length Worker Vehicle Class Vendor Vehicle Class Hauling Vehicle Class Architectural Coating 0 0.00 0.00 0.00 14.70 6.90 20.00 LD_Mix HDT_Mix HHDT Residential Indoor: 12,241; Residential Outdoor: 4,080; Non-Residential Indoor: 0; Non-Residential Outdoor: 0; Striped Parking Area: 0 (Architectural Coating – sqft) Acres of Grading (Grading Phase): 0 Acres of Paving: 0 CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 6 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 3.2 Architectural Coating - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Archit. Coating 0.0189 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0189 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Unmitigated Construction On-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Unmitigated Construction Off-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 7 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 4.0 Operational Detail - Mobile 3.2 Architectural Coating - 2019 ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Archit. Coating 0.0189 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Off-Road 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0189 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Mitigated Construction On-Site ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Hauling 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Vendor 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Worker 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Total 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Mitigated Construction Off-Site CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 8 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Mitigated 0.0182 0.0931 0.2536 7.7000e- 004 0.0593 9.0000e- 004 0.0602 0.0159 8.5000e- 004 0.0167 0.0000 71.2527 71.2527 4.1800e- 003 0.0000 71.3573 Unmitigated 0.0182 0.0931 0.2536 7.7000e- 004 0.0593 9.0000e- 004 0.0602 0.0159 8.5000e- 004 0.0167 0.0000 71.2527 71.2527 4.1800e- 003 0.0000 71.3573 4.1 Mitigation Measures Mobile 4.2 Trip Summary Information 4.3 Trip Type Information Average Daily Trip Rate Unmitigated Mitigated Land Use Weekday Saturday Sunday Annual VMT Annual VMT Apartments Low Rise 13.18 14.32 12.14 45,087 45,087 Apartments Mid Rise 33.25 31.95 29.30 111,057 111,057 Total 46.43 46.27 41.44 156,144 156,144 Miles Trip %Trip Purpose % Land Use H-W or C-W H-S or C-C H-O or C-NW H-W or C-W H-S or C-C H-O or C-NW Primary Diverted Pass-by Apartments Low Rise 14.70 5.90 8.70 40.20 19.20 40.60 86 11 3 Apartments Mid Rise 14.70 5.90 8.70 40.20 19.20 40.60 86 11 3 4.4 Fleet Mix CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 9 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 5.0 Energy Detail ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Electricity Mitigated 0.0000 0.0000 0.0000 0.0000 0.0000 9.1513 9.1513 3.8000e- 004 8.0000e- 005 9.1841 Electricity Unmitigated 0.0000 0.0000 0.0000 0.0000 0.0000 9.1513 9.1513 3.8000e- 004 8.0000e- 005 9.1841 NaturalGas Mitigated 5.4000e- 004 4.5900e- 003 1.9500e- 003 3.0000e- 005 3.7000e- 004 3.7000e- 004 3.7000e- 004 3.7000e- 004 0.0000 5.3183 5.3183 1.0000e- 004 1.0000e- 004 5.3499 NaturalGas Unmitigated 5.4000e- 004 4.5900e- 003 1.9500e- 003 3.0000e- 005 3.7000e- 004 3.7000e- 004 3.7000e- 004 3.7000e- 004 0.0000 5.3183 5.3183 1.0000e- 004 1.0000e- 004 5.3499 5.1 Mitigation Measures Energy Land Use LDA LDT1 LDT2 MDV LHD1 LHD2 MHD HHD OBUS UBUS MCY SBUS MH Apartments Low Rise 0.548007 0.045751 0.200309 0.124119 0.017133 0.006025 0.018861 0.028423 0.002391 0.002469 0.004915 0.000672 0.000925 Apartments Mid Rise 0.548007 0.045751 0.200309 0.124119 0.017133 0.006025 0.018861 0.028423 0.002391 0.002469 0.004915 0.000672 0.000925 Historical Energy Use: N CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 10 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 5.2 Energy by Land Use - NaturalGas NaturalGa s Use ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Land Use kBTU/yr tons/yr MT/yr Apartments Low Rise 32679.5 1.8000e- 004 1.5100e- 003 6.4000e- 004 1.0000e- 005 1.2000e- 004 1.2000e- 004 1.2000e- 004 1.2000e- 004 0.0000 1.7439 1.7439 3.0000e- 005 3.0000e- 005 1.7543 Apartments Mid Rise 66980.9 3.6000e- 004 3.0900e- 003 1.3100e- 003 2.0000e- 005 2.5000e- 004 2.5000e- 004 2.5000e- 004 2.5000e- 004 0.0000 3.5744 3.5744 7.0000e- 005 7.0000e- 005 3.5956 Total 5.4000e- 004 4.6000e- 003 1.9500e- 003 3.0000e- 005 3.7000e- 004 3.7000e- 004 3.7000e- 004 3.7000e- 004 0.0000 5.3183 5.3183 1.0000e- 004 1.0000e- 004 5.3499 Unmitigated NaturalGa s Use ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Land Use kBTU/yr tons/yr MT/yr Apartments Low Rise 32679.5 1.8000e- 004 1.5100e- 003 6.4000e- 004 1.0000e- 005 1.2000e- 004 1.2000e- 004 1.2000e- 004 1.2000e- 004 0.0000 1.7439 1.7439 3.0000e- 005 3.0000e- 005 1.7543 Apartments Mid Rise 66980.9 3.6000e- 004 3.0900e- 003 1.3100e- 003 2.0000e- 005 2.5000e- 004 2.5000e- 004 2.5000e- 004 2.5000e- 004 0.0000 3.5744 3.5744 7.0000e- 005 7.0000e- 005 3.5956 Total 5.4000e- 004 4.6000e- 003 1.9500e- 003 3.0000e- 005 3.7000e- 004 3.7000e- 004 3.7000e- 004 3.7000e- 004 0.0000 5.3183 5.3183 1.0000e- 004 1.0000e- 004 5.3499 Mitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 11 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 6.1 Mitigation Measures Area 6.0 Area Detail 5.3 Energy by Land Use - Electricity Electricity Use Total CO2 CH4 N2O CO2e Land Use kWh/yr MT/yr Apartments Low Rise 8480.78 2.7022 1.1000e- 004 2.0000e- 005 2.7118 Apartments Mid Rise 20240.8 6.4492 2.7000e- 004 6.0000e- 005 6.4722 Total 9.1513 3.8000e- 004 8.0000e- 005 9.1841 Unmitigated Electricity Use Total CO2 CH4 N2O CO2e Land Use kWh/yr MT/yr Apartments Low Rise 8480.78 2.7022 1.1000e- 004 2.0000e- 005 2.7118 Apartments Mid Rise 20240.8 6.4492 2.7000e- 004 6.0000e- 005 6.4722 Total 9.1513 3.8000e- 004 8.0000e- 005 9.1841 Mitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 12 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e Category tons/yr MT/yr Mitigated 0.0489 2.6600e- 003 0.1170 1.2000e- 004 7.0800e- 003 7.0800e- 003 7.0800e- 003 7.0800e- 003 0.7435 1.5467 2.2903 2.3300e- 003 5.0000e- 005 2.3636 Unmitigated 0.0489 2.6600e- 003 0.1170 1.2000e- 004 7.0800e- 003 7.0800e- 003 7.0800e- 003 7.0800e- 003 0.7435 1.5467 2.2903 2.3300e- 003 5.0000e- 005 2.3636 6.2 Area by SubCategory ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e SubCategory tons/yr MT/yr Architectural Coating 1.8900e- 003 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Consumer Products 0.0218 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Hearth 0.0229 1.8200e- 003 0.0445 1.1000e- 004 6.6800e- 003 6.6800e- 003 6.6800e- 003 6.6800e- 003 0.7435 1.4288 2.1724 2.2200e- 003 5.0000e- 005 2.2428 Landscaping 2.2200e- 003 8.4000e- 004 0.0726 0.0000 4.0000e- 004 4.0000e- 004 4.0000e- 004 4.0000e- 004 0.0000 0.1179 0.1179 1.2000e- 004 0.0000 0.1208 Total 0.0489 2.6600e- 003 0.1171 1.1000e- 004 7.0800e- 003 7.0800e- 003 7.0800e- 003 7.0800e- 003 0.7435 1.5467 2.2903 2.3400e- 003 5.0000e- 005 2.3636 Unmitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 13 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 7.1 Mitigation Measures Water 7.0 Water Detail 6.2 Area by SubCategory ROG NOx CO SO2 Fugitive PM10 Exhaust PM10 PM10 Total Fugitive PM2.5 Exhaust PM2.5 PM2.5 Total Bio- CO2 NBio- CO2 Total CO2 CH4 N2O CO2e SubCategory tons/yr MT/yr Architectural Coating 1.8900e- 003 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Consumer Products 0.0218 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Hearth 0.0229 1.8200e- 003 0.0445 1.1000e- 004 6.6800e- 003 6.6800e- 003 6.6800e- 003 6.6800e- 003 0.7435 1.4288 2.1724 2.2200e- 003 5.0000e- 005 2.2428 Landscaping 2.2200e- 003 8.4000e- 004 0.0726 0.0000 4.0000e- 004 4.0000e- 004 4.0000e- 004 4.0000e- 004 0.0000 0.1179 0.1179 1.2000e- 004 0.0000 0.1208 Total 0.0489 2.6600e- 003 0.1171 1.1000e- 004 7.0800e- 003 7.0800e- 003 7.0800e- 003 7.0800e- 003 0.7435 1.5467 2.2903 2.3400e- 003 5.0000e- 005 2.3636 Mitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 14 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual Total CO2 CH4 N2O CO2e Category MT/yr Mitigated 3.0547 0.0150 3.8000e- 004 3.5412 Unmitigated 3.0547 0.0150 3.8000e- 004 3.5412 7.2 Water by Land Use Indoor/Out door Use Total CO2 CH4 N2O CO2e Land Use Mgal MT/yr Apartments Low Rise 0.130308 / 0.0821507 0.8728 4.2800e- 003 1.1000e- 004 1.0118 Apartments Mid Rise 0.32577 / 0.205377 2.1819 0.0107 2.7000e- 004 2.5294 Total 3.0547 0.0150 3.8000e- 004 3.5412 Unmitigated CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 15 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 8.1 Mitigation Measures Waste 7.2 Water by Land Use Indoor/Out door Use Total CO2 CH4 N2O CO2e Land Use Mgal MT/yr Apartments Low Rise 0.130308 / 0.0821507 0.8728 4.2800e- 003 1.1000e- 004 1.0118 Apartments Mid Rise 0.32577 / 0.205377 2.1819 0.0107 2.7000e- 004 2.5294 Total 3.0547 0.0150 3.8000e- 004 3.5412 Mitigated 8.0 Waste Detail Total CO2 CH4 N2O CO2e MT/yr Mitigated 0.6536 0.0386 0.0000 1.6193 Unmitigated 0.6536 0.0386 0.0000 1.6193 Category/Year CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 16 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 8.2 Waste by Land Use Waste Disposed Total CO2 CH4 N2O CO2e Land Use tons MT/yr Apartments Low Rise 0.92 0.1868 0.0110 0.0000 0.4627 Apartments Mid Rise 2.3 0.4669 0.0276 0.0000 1.1567 Total 0.6536 0.0386 0.0000 1.6193 Unmitigated Waste Disposed Total CO2 CH4 N2O CO2e Land Use tons MT/yr Apartments Low Rise 0.92 0.1868 0.0110 0.0000 0.4627 Apartments Mid Rise 2.3 0.4669 0.0276 0.0000 1.1567 Total 0.6536 0.0386 0.0000 1.6193 Mitigated 9.0 Operational Offroad Equipment Type Number Hours/Day Days/Year Horse Power Load Factor Fuel Type CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 17 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual 11.0 Vegetation 10.0 Stationary Equipment Fire Pumps and Emergency Generators Equipment Type Number Hours/Day Hours/Year Horse Power Load Factor Fuel Type Boilers Equipment Type Number Heat Input/Day Heat Input/Year Boiler Rating Fuel Type User Defined Equipment Equipment Type Number CalEEMod Version: CalEEMod.2016.3.2 Date: 3/20/2019 4:36 PMPage 18 of 18 Rives Mansion Current - Los Angeles-South Coast County, Annual City of Downey | Initial Study for: Rives Mansion Conversion C-1 Trinity Consultants APPENDIX C: WJVA NOISE REPORT 19‐006 (Rives Mansion, Downey) 4‐16‐19 1 ACOUSTICAL ANALYSIS HISTORIC RIVES MANSION DOWNEY, CALIFORNIA WJVA Report No. 19‐006 PREPARED FOR TRINITY CONSULTANTS, INC. 20 CORPORATE PARK SUITE, 200 IRVINE, CA 92606 PREPARED BY WJV ACOUSTICS, INC. VISALIA, CALIFORNIA MAY 14, 2019 113 N. Church Street, Suite 203 ∙ Visalia, CA 93291∙ (559) 627-4923 ∙ 19‐006 (Rives Mansion, Downey) 4‐16‐19 2 1. INTRODUCTION Project Description: The proposed project involves the remodel of an existing historic residential building (Historic Rives Mansion), carriage house and water tower to create office space. It also includes the construction of a new retail building. The new building will likely be used as a café. The Rives Mansion is located at 10921 Paramount Boulevard on a 36,750‐square‐foot (sf) lot in Downey, CA. The property is bounded by Paramount Boulevard to the east, 3rd Street to the south, 7955 3rd Street to the west and an alley separating 3rd and 4th Street to the north. Environmental Noise Assessment: This environmental noise assessment has been prepared to determine if significant noise impacts will be produced by the project and to describe mitigation measures for noise if significant impacts are determined. The environmental noise assessment, prepared b y WJV Acoustics, Inc. (WJVA), is based upon the project description provided by Trinity Consultants, project site plan provided by the project architect, SMS Architects and the findings of on‐site noise measurements. Revisions to the site plan or other project‐related information available to WJVA at the time the analysis was prepared may require a reevaluation of the findings and/or recommendations of the report. Appendix A provides definitions of the acoustical terminology used in this report. Unless otherwise stated, all sound levels reported in this analysis are A‐weighted sound pressure levels in decibels (dB). A‐weighting de‐emphasizes the very low and very high frequencies of sound in a manner similar to the human ear. Most community noise standards utilize A‐weighted sound levels, as they correlate well with public reaction to noise. Appendix B provides examples of sound levels for reference. 19‐006 (Rives Mansion, Downey) 4‐16‐19 3 2. THRESHOLDS OF SIGNIFICANCE The CEQA Guidelines indicate that significant noise impacts occur when the project exposes people to noise levels in excess of standards established in local noise ordinances or general plan noise elements or causes a substantial permanent or temporary increase in noise levels above levels existing without the project. a. Noise Level Standards CITY OF DOWNEY The Noise Element of the City of Downey General (hereafter referred to as General Plan, adopted January 25, 2005) establishes land use compatibility criteria in terms of the Community Noise Equivalent Level (CNEL) to describe noise exposure for noise compatibility planning purposes. The CNEL represents the time‐weighted energy average noise level for a 24‐hour day, with a 5 dB (technically 4.77 dB) penalty that is added to noise levels occurring during the evening hours between 7:00 p.m. and 10:00 p.m. and a 10 dB penalty added to noise levels occurring during the nighttime hours (10:00 p.m.‐7:00 a.m.). The CNEL represents cumulative exposure to noise over an extended period of time and are therefore calculated based upon annual average conditions. Table I provides the City’s acceptable noise levels for various land uses. For residential land uses, exterior noise level standards apply to backyards of single‐fam ily homes and patios, balconies and common recreational areas for multiple‐family residential land uses. Table I describes the noise level standards provided in Figure 6‐1.3 of City of Downey General Plan Noise Element. The Noise Element also requires that interior noise levels attributable to exterior sources not exceed 45 dB Ldn. This standard is consistent with interior noise level criter ia applied by the State of California and the U.S. Department of Housing and Urban Development (HUD). The intent of the interior noise level standard is to provide an acceptable noise environment for indoor communication and sleep. TABLE I CITY OF DOWNEY ACCEPTABLE NOISE LEVELS FOR LAND USES dBA, CNEL Land Use Interior, dBA CNEL Exterior, dBA CNEL Residential 45 60 Schools, parks & other non‐residential noise‐sensitive land uses 45 60 Commercial 65 ‐‐‐ Industrial 70 ‐‐‐ Source: City of Downey General Plan, 2005 19‐006 (Rives Mansion, Downey) 4‐16‐19 4 Additionally, section 4606.3 (Maximum Permissible Noise Levels by Sound Sources Across Property Boundaries) of the City of Downey Municipal Code states the following: “(a) All activities to which this chapter is applicable shall be conducted in such a manner that any noise produced shall not create a disturbance. The maximum permissible sound pressure level measured at the property boundary of any land use in Subsection (b) of this section from any noise source not operating on a public right‐of‐way shall constitute prima facie evidence of a public nuisance when such noise level exceeds five (5) db(A) above the ambient noise level at any period during the course of a twenty‐four (24) hour day. (b) If the alleged noise source is of a continuous nature and cannot reasonably be discontinued for a time period wherein the ambient noise level can be determined, the maximum permissible steady noise level by sound sources across the property boundary of any land use cited below may be less, but not greater than: Land Use 7:00 a.m. to 10:00 p.m. 10:00 p.m. to 7:00 a.m. Residential 55 db(A) 45 db(A) Commercial 65 db(A) 65 db(A) Manufacturing 70 db(A) 70 db(A) (c) If any parcel of real property is developed and used for multiple land uses, the lower land use noise level standard shall apply. (d) In the hours between 7:00 a.m. to 10:00 p.m., the noise levels permitted in Subsection (b) of this section may be adjusted by the inclusion of the following factors when applicable: (1) Noise source operated 12 minutes per hour or less + 5 db(A) (2) Noise source operated 3 minutes per hour or less + 10 db(A) (3) Noise source operated 1 minute per hour or less + 15 db(A) 19‐006 (Rives Mansion, Downey) 4‐16‐19 5 The subject property is zoned Downtown Downey Specific Plan (DDSP), existing Residential (R‐1) is located to the north, south and west of the project site, and commercially zoned property is located to the north (C‐P) and to the south (C‐2). State of California There are no state noise standards that are applicable to the project. Federal Noise Standards There are no federal noise standards that are applicable to the project. b. Construction Noise Section 4606.5 (Construction Projects) of the City of Downey Municipal Code provides guidelines in respect to construction noise limitations. The municipal code provides time restrictions as well as maximum allowable noise levels for construction activities, based upon land zoning designations. In regards to time limitations for construction activities, the municipal code states the following:  Construction, repair or remodeling equipment and devices and other related construction noise sources shall be exempted from the provisions of this chapter provided a valid permit for such construction, repair, or remodeling shall have been obtained from the City. In any circumstance other than emergency work, no repair or remodeling shall take place between the hours of 9:00 p.m. of one day and 7:00 a.m. of the following day, and no repair or remodeling shall exceed eighty‐five (85) db(A) across any property boundary at any time during the course of a twenty‐four (24) hour day. c. Vibration There are no state or federal standards that specifically address construction vibration. Additionally, the City of Downey General Plan and Municipal Code do not specifically provide vibration guidelines or standards. Some guidance is provided by the Caltrans Transportation and Construction Vibration Guidance Manual. The Manual provides guidance for determining annoyance potential criteria and damage potential threshold criteria. These criteria are provided below in Table II and Table III and are presented in terms of peak particle velocity (PPV) in inches per second (in/sec). 19‐006 (Rives Mansion, Downey) 4‐16‐19 6 TABLE II GUIDELINE VIBRATION ANNOYANCE POTENTIAL CRITERIA Human Response Maximum PPV (in/sec) Transient Sources Continuous/Frequent Intermittent Sources Barely Perceptible 0.04 0.01 Distinctly Perceptible 0.25 0.04 Strongly Perceptible 0.9 0.1 Severe 2.0 0.4 Source: Caltrans TABLE III GUIDELINE VIBRATION DAMAGE POTENTIAL THRESHOLD CRITERIA Structure and Condition Maximum PPV (in/sec) Transient Sources Continuous/Frequent Intermittent Sources Extremely fragile, historic buildings, ancient monuments 0.12 0.08 Fragile buildings 0.2 0.1 Historic and some old buildings 0.5 0.25 Older residential structures 0.5 0.3 New residential structures 1.0 0.5 Modern industrial/commercial buildings 2.0 0.5 Source: Caltrans Substantial Noise Increases: CEQA does not define what constitutes a substantial increase in noise levels. Some guidance is provided by the 1992 findings of the Federal Interagency Committee on Noise (FICON)2, which assessed changes in ambient noise levels resulting from aircraft operations. The FICON recommendations are based upon studies that relate aircraft and traffic noise levels to the percentage of persons highly annoyed by the noise. The rationale for the FICON recommendations is that it is possible to consistently describe the annoyance of people exposed to transportation noise in terms of the DNL (or CNEL). Annoyance is a summary measure of the general adverse reaction of people to noise that results in speech interference, sleep disturbance, or interference with other daily activities. Although the FICON recommendations were specifically developed to address aircraft noise impacts, they are used in this analysis for all transportation noise sources that are described in terms of cumulative noise exposure metrics such as the DNL or CNEL. Table IV summarizes the FICON recommendations. 19‐006 (Rives Mansion, Downey) 4‐16‐19 7 TABLE IV MEASURES OF SUBSTANTIAL NOISE INCREASE FOR TRANSPORTATION SOURCES Ambient Noise Level Without Project (DNL/CNEL) Significant Impact Assumed to Occur if the Project Increases Ambient Noise Levels By: <60 dB + 5 dB or more 60‐65 dB +3 dB or more >65 dB +1.5 dB or more Source: FICON, 1992, as applied by WJV Acoustics, Inc. For noise sources that are not transportation related, which usually includes commercial or industrial activities and other stationary noise sources, it is common to assume that a 3‐5 dB increase in noise levels represents a substantial increase in ambient noise levels. This is based on laboratory tests that indicate that a 3 dB increase is the minimum change perceptible to most people, and a 5 dB increase is perceived as a “definitely noticeable change.” 19‐006 (Rives Mansion, Downey) 4‐16‐19 8 3. SETTING The project site, located at 10921 Paramount Boulevard within the City of Downey, includes an existing historic residential building (Historic Rives Mansion), carriage house and water tower. The project site is surrounded by residential land uses to the north, west and the south and commercial land uses to the east, along Paramount Boulevard. The project site plan is provided as Figure 1. The project site and vicinity are provided as Figure 2. a. Background Noise Level Measurements Existing noise levels in the project vicinity are dominated by traffic noise associated with vehicles on Paramount Boulevard, and to a lesser extent, on 3 rd Street. The City of Downey is also exposed to aircraft noise, predominantly resulting from its location along the flight path of commercial aircraft upon approach to LAX (Los Angeles International Airport). Other sources of noise observed during a site visit included landscaping activities, birds, human voices, sirens and noise associated with nearby construction activities. Measurements of existing ambient noise levels in the project vi cinity were conducted on March 19, 2019. Long‐term (24‐hour) ambient noise level measurements were conducted at one (1) location (sites LT1). Site LT1 was located in the front yard of the Rives Mansion, and was exposed to noise associated with vehicle traffic along Paramount Boulevard, aircraft overflights and noise associated with human activities at nearby residential land uses. Additionally, short‐term (15‐minute) ambient noise level measur ements were conducted at four (4) locations (Sites ST1 through ST4). The locations of the noise m onitoring sites are shown on Figure 2. Two (2) individual noise measurements were taken at each of the four t short‐term sites to quantify ambient noise levels in the morning and afternoon hours. The locations of the long‐term and short‐ term sites are shown in Figure 2. A photo of the long‐term site LT1 is provided as Figure 3. Noise monitoring equipment consisted of Larson‐Davis Laboratories Model LDL‐820 sound level analyzers equipped with B&K Type 4176 1/2” microphones. The equipment complies with the specifications of the American National Standards Institute (ANSI) for Type I (Precision) sound level meters. The meters were calibrated with a B&K Type 4230 acoustic calibrator to ensure the accuracy of the measurements. Table V provides the hourly average noise levels (Leq), the hourly maximum (Lmax) and the L90 statistical noise levels at the 24‐hour measurement site, LT1. Measured hourly energy average noise levels (Leq) at site LT1 ranged from a low of 53.7 dB between 2:00 a.m. and 3:00 a.m. to a high of 64.1 dBA between 11:00 a.m. and noon. Hourly maximum (Lmax) noise levels at site LT1 ranged from 69.7 to 88.3 dBA. Residual noise levels at the monitoring site, as defined by the L90, ranged from 38.7 to 55.4 dBA. The L90 is a statistical descriptor that defines the noise level exceeded 90% of the time during each hour of the sample period. The L90 is generally considered to represent the residual (or background) noise level in the absence of identifiable single noise events from traffic, aircraft and other local noise sources. The measured Ldn value at site LT1 during the two individual 19‐006 (Rives Mansion, Downey) 4‐16‐19 9 days of noise monitoring was 66.5 dB Ldn. Figure 4 graphically depicts hourly variations in ambient noise levels at site LT1. TABLE V SUMMARY OF 24-HOUR NOISE LEVEL MEASUREMENTS HISTORIC RIVES MANSION, DOWNEY CALIFORNIA MARCH 19, 2019 Time A‐Weighted Decibels, dB, Leq (one‐hour average) LT1 Leq Lmax L90 12:00 a.m. 57.8 82.8 47.3 1:00 a.m. 54.8 70.7 44.2 2:00 a.m. 53.7 69.7 40.4 3:00 a.m. 54.8 72.8 38.7 4:00 a.m. 57.9 70.2 42.6 5:00 a.m. 60.4 73.5 45.2 6:00 a.m. 62.6 78.7 50.0 7:00 a.m. 62.4 74.6 54.5 8:00 a.m. 62.3 74.5 54.5 9:00 a.m. 60.8 71.4 53.1 10:00 a.m. 63.7 72.0 55.1 11:00 a.m. 64.1 78.4 55.5 12:00 p.m. 63.8 88.3 54.2 1:00 p.m. 61.3 76.7 52.7 2:00 p.m. 61.9 72.1 54.4 3:00 p.m. 62.1 74.8 54.4 4:00 p.m. 62.4 73.1 54.5 5:00 p.m. 62.6 76.6 55.3 6:00 p.m. 62.6 72.5 54.9 7:00 p.m. 62.0 75.0 53.0 8:00 p.m. 64.0 86.9 53.2 9:00 p.m. 61.1 76.3 51.2 10:00 p.m. 60.4 77.4 50.0 11:00 p.m. 58.9 79.5 48.5 24‐Hour CNEL, dB 66.5 db CNEL Source: WJV Acoustics, Inc. Table VI summarizes short‐term noise measurement results. The noise measurement data included energy average (Leq) maximum (Lmax) as well as five individual statistical parameters. Observations were made of the dominant noise sources affecting the measurements. The statistical parameters describe the percent of time a noise level was exceeded during the measurement period. As stated above, the L 90 describes the noise level exceeded 90 percent of the time during the measurement period and is generally considered to represent the residual (or background) noise level in the absence of identifiable single noise events from traffic, aircraft and other local noise sources. 19‐006 (Rives Mansion, Downey) 4‐16‐19 10 TABLE VI SUMMARY OF SHORT-TERM NOISE MEASUREMENT DATA HISTORIC RIVES MANSION, DOWNEY CALIFORNIA MARCH 19 & 20, 2019 Site Time A‐Weighted Decibels, dBA Sources Leq Lmax L2 L8 L25 L50 L90 ST1 8:11 a.m. 58.1 68.3 66.2 62.7 58.0 54.8 49.7 TR, V, LB, AC, BD ST1 4:47 p.m. 60.1 72.4 67.9 64.1 59.7 55.5 52.6 TR, AC, V, D ST2 8:24 a.m. 68.7 75.8 73.9 72.7 70.5 67.2 59.5 TR, AC ST2 5:05 p.m. 69.0 77.4 75.2 73.2 71.1 67.5 60.1 TR, AC ST3 8:44 a.m. 69.8 81.1 75.2 73.3 71.2 68.0 58.7 TR, AC ST3 5:26 p.m. 68.7 77.8 75.0 73.1 68.9 66.8 58.3 TR, AC ST4 9:08 a.m. 55.9 65.4 62.1 60.8 56.5 52.7 49.3 TR, AC, V, BD, C ST4 5:45 p.m. 54.3 66.8 61.0 58.7 55.9 52.4 48.8 TR, AC, V TR: Traffic AC: Aircraft V: Voices D: Dogs Barking BD: Birds Leaf Blower: LB C: Construction Activities Source: WJV Acoustics, Inc. Short‐term noise measurements were conducted for 15‐minute periods. Sites ST2 and ST3 were located adjacent to Paramount Avenue, and the noise environment was dominated by vehicle traffic along Paramount Avenue as well as aircraft overflights. Site ST1 and ST4 were located toward the rear of the project site, and were also exposed to traffic noise and aircraft noise, but other sources such as leaf blowers, human voices, birds, barking dogs and construction activities were also noted. Generally speaking, the noise monitoring at the long‐ and short‐term measurements sites indicated that the project site and vicinity is predominantly exposed to noise associated with roadway traffic and aircraft overflights. 19‐006 (Rives Mansion, Downey) 4‐16‐19 11 4. PROJECT IMPACT ASSESSMENT a. Project Traffic Noise Impacts on Existing Noise-Sensitive Land Uses Outside Project Site (Less than Significant) The City of Downey Circulation Element of the General Plan provides traffic volumes for major roadways within the City. According to the Circulation Element, Annual Average Daily Traffic (AADT) volumes at the time the Circulation Element was prepared (2005) were approximately 41,700 for Paramount Boulevard, between Firestone Boulevard and Florence Avenue. Projected (2025) AADT volumes were provided as 49,400. Daily trip generation volumes for the project were calculated using the California Emissions Generator Model (CalEEMod) model, and determined to be approximately 204 daily trips, representing an increase of approximately 165 daily trips over the existing daily trips of 39 associated with the existing residential land uses. When added to existing traffic volumes along Paramount Avenue, project‐related increases in traffic would not result in any measurable increase in traffic noise in the project area. b. Project Noise Impacts from Operational On-Site Sources (Less than Significant) Sources of operational noise from the proposed project (office land uses) would typically be limited to parking lot vehicle movements, human activity and Mechanical/HVAC systems. Additionally, the proposed café to be located adjacent to Paramount Avenue could include the use of exhaust fans. Mechanical: Mechanical equipment associated with the project would likely include HVAC units for office uses within the main house, the carriage house and the water tower. Additionally, the project would include the construction of a commercial/retail building, likely to house a café type land use. Mechanical equipment associated with such a commercial space would include an HVAC unit and likely an exhaust fan as well. WJVA has measured noise levels associated with HVAC equipment on numerous occasions. Noise levels associated with HVAC equipment is typically in the range of approximately 40‐50 dB at a distance of 100 feet. The potential location of HVAC equipment is not known at this time, but noise levels associated with HVAC equipment would not be expected to exceed the City’s exterior noise level standard at any nearby noise‐sensitive land uses, nor would it exceed existing ambient noise levels in the project area. In regards to a potential roof‐mounted exhaust fan at the comme rcial land use located adjacent to Paramount Boulevard, WJVA has assessed noise levels associated various types of commercial exhaust fans for previous projects. Typically, noise levels associated with commercial exhaust fans are in the range of 45‐55 dB at a distance of 100 feet from the source. Additionally, acoustical 19‐006 (Rives Mansion, Downey) 4‐16‐19 12 shielding is often provided by parapets for roof mounted mechanical equipment. Noise levels associated with HVAC equipment is typically in the range of approximately 40‐50 dB at a distance of 100 feet. The potential location of HVAC equipment is not known at the time of this analysis. However, noise levels associated with HVAC equipment would not be expected to exceed the City’s exterior noise level standard at any nearby noise‐sensitive land uses, nor would it exceed existing ambient noise levels in the project area. Vehicle Movements: Vehicles would enter the project site via roadway access off of Paramount Boulevard. Parking spaces will be located along the northern and southern project site boundary. Vehicles would exit the project site via either the same access point off of Paramount Boulevard or an exit located along 3rd Street. The 3rd street access point will be used for exit proposes only. The project site plans indicate that the project will include the construction of a 6‐foot masonry wall along the project site boundary with adjacent residential land uses. The concrete wall would provide approximately 5 dB of noise level reduction from vehicle movements occurring within the project site. Noise due to traffic in parking lots is typically limited by low speeds and is not usually considered to be significant. Human activity in parking lots that can produce noise includes voices, stereo systems and the opening and closing of car doors and trunk lids. Such activities can occur at any time during regular hours of operation. The noise levels associated with these activities cannot be precisely defined due to variables such as the number of parking movements, time of day and other factors. It is typical for a passing car in a parking lot to produce a maximum noise level of 60 to 65 dBA at a distance of 50 feet, which is comparable to the level of a raised voice. Noise levels associated with vehicle movements would typically be in the range of 50 to 55 dB at the closest residential land uses. Due to the infrequent nature of vehicle movements, such noise levels would not contribute to overall noise exposure in terms of the CNEL metric, at nearby noise‐sensitive land uses. Additionally, such noise levels would not exceed existing ambient noise levels in the project vicinity. Further mitigation is not required. c. Noise From Construction (Less than Significant) Construction noise could occur at various locations within the project site through the renovation, demolition and build‐out period. Table VIII provides typical construction‐related noise levels at reference distances of 25 feet, 50 feet, and 100 feet. Construction noise is not usually considered to be a significant impact if construction is limited to the daytime hours and construction equipment is adequately maintained and muffled. Extraordinary noise‐producing activities (e.g., pile driving) are not anticipated. Additionally, construction activities should be restricted as described in Section 4606.5 (Construction Projects) of 19‐006 (Rives Mansion, Downey) 4‐16‐19 13 the City of Downey Municipal Code (and provided in Section 2.b of this report). Further mitigation is not required. TABLE VII TYPICAL CONSTRUCTION EQUIPMENT MAXIMUM NOISE LEVELS, dBA Type of Equipment 25 Ft. 50 Ft. 100 Ft. Backhoe 84 78 72 Concrete Saw 96 90 84 Crane 87 81 75 Excavator 87 81 75 Front End Loader 85 79 73 Jackhammer 95 89 83 Paver 83 77 71 Pneumatic Tools 91 85 79 Dozer 88 82 76 Rollers 86 80 74 Trucks 92 86 80 Pumps 86 80 74 Scrapers 93 87 81 Portable Generators 86 80 74 Front Loader 92 86 80 Backhoe 92 86 80 Excavator 92 86 80 Grader 92 86 80 Source: FHWA Noise Control for Buildings and Manufacturing Plants, Bolt, Beranek & Newman, 1987 19‐006 (Rives Mansion, Downey) 4‐16‐19 14 d. Vibration Impacts (Less Than Significant) The dominant sources of man‐made vibration are sonic booms, blasting, pile driving, pavement breaking, demolition, diesel locomotives, and rail‐car coupling. Vibration from construction activities could be detected at the closest sensitive land uses, especially during movements by heavy equipment or loaded trucks and during some paving activities. Typical vibration levels at distance of 25 and 100 feet are summarized by Table VIII. TABLE VIII TYPICAL VIBRATION LEVELS DURING CONSTRUCTION PPV (in/sec) Equipment @ 25´ @ 100´ Bulldozer (Large) 0.09 0.011 Bulldozer (Small) 0.003 0.0004 Loaded Truck 0.08 0.01 Jackhammer 0.04 0.005 Vibratory Roller 0.2 .03 Loaded Trucks 0.08 .01 Source: Caltrans Table VIII indicates that the equipment with the highest potential vibration levels would be a vibratory roller. While in use, a roller could produce vibration levels of approximately 0.03 PPV (in/sec) at a distance of 100 feet. As described in Table II and Table III, such levels would not be expected to cause damage to any of the described building types and would be “barely noticeable” at the closest residence if the equipment was used continuously or frequently. Such levels are not considered to be a significant impact. After full project build out, it is not expected that ongoing operational activities will result in any vibration impacts at nearby sensitive uses. Activities involved in trash bin collection could result in minor on‐site vibrations as the bin is placed back onto the ground. Such vibrations would not be expected to be felt at the closest off‐site sensitive uses. 19‐006 (Rives Mansion, Downey) 4‐16‐19 15 5. IMPACT SUMMARY Project‐related noise levels resulting from the proposed Historic Rives Mansion are not expected to exceed any applicable City of Downey noise level standards or result in any significant long‐term increases in ambient noise levels in the project vicinity or throughout the City. Project site demolition and project construction could result in‐short term increases in localized ambient noise levels. However, construction‐related noise levels are not considered to be a significant impact if local construction noise time limits are observed and equipment is properly maintained and muffled. Additional mitigation is not required. 19 ‐ 0 0 6 ( R i v e s M a n s i o n , D o w n e y ) 4 ‐ 1 6 ‐ 1 9 16 FI G U R E 1 : P R O J E C T S I T E P L A N 19 ‐ 0 0 6 ( R i v e s M a n s i o n , D o w n e y ) 4 ‐ 1 6 ‐ 1 9 17 FI G U R E 2 : P R O J E C T V I C I N I T Y A N D AM B I E N T N O I S E M O N I T O R I N G S I T E S 19 ‐ 0 0 6 ( R i v e s M a n s i o n , D o w n e y ) 4 ‐ 1 6 ‐ 1 9 18 FI G U R E 3 : N O I S E M O N I T O R I N G S I T E L T 1 19 ‐ 0 0 6 ( R i v e s M a n s i o n , D o w n e y ) 4 ‐ 1 6 ‐ 1 9 19 FI G U R E 4 : H O U R L Y N O I S E L E V E L S A T S I T E L T 1 2030405060708090 10 0 0 : 0 0 : 0 0 1 : 0 0 : 0 0 2 : 0 0 : 0 0 3 : 0 0 : 0 0 4 : 0 0 : 0 0 5 : 0 0 : 0 0 6 : 0 0 : 0 0 7 : 0 0 : 0 0 8 : 0 0 : 0 0 9 : 0 0 : 0 0 1 0 : 0 0 : 0 0 1 1 : 0 0 : 0 0 1 2 : 0 0 : 0 0 1 3 : 0 0 : 0 0 1 4 : 0 0 : 0 0 1 5 : 0 0 : 0 0 1 6 : 0 0 : 0 0 1 7 : 0 0 : 0 0 1 8 : 0 0 : 0 0 1 9 : 0 0 : 0 0 2 0 : 0 0 : 0 0 2 1 : 0 0 : 0 0 2 2 : 0 0 : 0 0 2 3 : 0 0 : 0 0 L e v e l s , d B A Ti m e Si t e L T 1 Ma r c h 1 9 , 2 0 1 9 Lm a x Le q L9 0 APPENDIX A‐1 ACOUSTICAL TERMINOLOGY AMBIENT NOISE LEVEL: The composite of noise from all sources near and far. In this context, the ambient noise level constitutes the normal or exis ting level of environmental noise at a given location. CNEL: Community Noise Equivalent Level. The average equivalent sound level during a 24‐hour day, obtained after addition of approximately five decibels to sound levels in the evening from 7:00 p.m. to 10:00 p.m. and ten decibels to sound levels in the night before 7:00 a.m. and after 10:00 p.m. DECIBEL, dB: A unit for describing the amplitude of sound, equal to 20 times the logarithm to the base 10 of the ratio of the pressure of the sound measured to the reference pressure, which is 20 micropascals (20 micronewtons per square meter). DNL/Ldn: Day/Night Average Sound Level. The average equivalent sound level during a 24‐hour day, obtained after addition of ten decibels to sound levels in the night after 10:00 p.m. and before 7:00 a.m. Leq: Equivalent Sound Level. The sound level containing the same total energy as a time varying signal over a given sample period. Leq is typically computed over 1, 8 and 24‐hour sample periods. NOTE: The CNEL and DNL represent daily levels of noise exposure averaged on an annual basis, while Leq represents the average noise exposure for a shorter time period, typically one hour. Lmax: The maximum noise level recorded during a noise event. Ln: The sound level exceeded "n" percent of the time during a sample interval (L90, L50, L10, etc.). For example, L10 equals the level exceeded 10 percent of the time. A‐2 ACOUSTICAL TERMINOLOGY NOISE EXPOSURE CONTOURS: Lines drawn about a noise source indicating constant levels of noise exposure. CNEL and DNL contours are frequently utilized to describe community exposure to noise. NOISE LEVEL REDUCTION (NLR): The noise reduction between indoor and outdoor environments or between two rooms that is the numerical difference, in decibels, of the average sound pressure levels in those areas or rooms. A measurement of Anoise level reduction” combines the effect of the transmission loss performance of the structure plus the effect of acoustic absorption present in the receiving room. SEL or SENEL: Sound Exposure Level or Single Event Noise Exposure Level. The level of noise accumulated during a single noise event, such as an aircraft overflight, with reference to a duration of one second. More specifically, it is the time‐integrated A‐weighted squared sound pressure for a stated time interval or event, based on a reference pressure of 20 micropascals and a reference duration of one second. SOUND LEVEL: The sound pressure level in decibels as measured on a sound level meter using the A‐weighting filter network. The A‐weighting filter de‐emphasizes the very low and very high frequency components of the sound in a manner similar to the response of the human ear and gives good correlation with subjective reactions to noise. SOUND TRANSMISSION CLASS (STC): The single‐number rating of sound transmission loss for a construction element (window, door, etc.) over a frequency range where speech intelligibility largely occurs.