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HomeMy WebLinkAboutResolution No. 4669RESOLUTION NO. 4669 RESOLUTION OF THE CITY COUNCIL OF THE CITY OF DOWNEY APPROVING A NEGATIVE DECLARATION FOR RANCHO LOS AMIGOS PARCEL A (GP 85 -1; SP 85 -1) -- THE CITY COUNCIL OF THE CITY OF DOWNEY DOES RESOLVE AS FOLLOWS: Section 1. Findings. The City Council of the City of Downey hereby finds and determines as follows: 1. That applications for a General Plan Amendment (GP 85 -1) from Public to Light Industrial and for a rezoning (Z.C. #218) from R1 -5000 to M -1 Light Manufacturing of a 14± acre site were submitted to the City to allow develop- ment of Parcel A of Rancho Los Amigos ( "the Project ") with office, business and light manufacturing uses. The rezoning application was withdrawn and replaced by an application for a Specific Plan (SP 85 -1) for office, business, and light manufacturing uses. The proposed Specific Plan contains the land use regulations and development standards for the site and would operate in lieu of the M -1 zoning classification. "Attached hereto as Exhibit A, and incorporated herein by reference, is an area map depicting the location of the Project." 2. That the Project site is a portion of 212± acre site developed and used for a County hospital (Rancho Los Amigos Medical Center). The Project site is located in a fully urbanized area. 3. That an initial study and negative declaration were prepared for the Project as initially submitted (GP 85 -1 and Z.C. #218) in accordance with the California Environmental Quality Act, Public Resources Code Sections 21000 et seq. ( "Guidelines "). A copy of the initial study is attached hereto as Exhibit B and incorporated herein. A copy of the negative declaration is attached hereto as Exhibit C and incorporated herein. 4. That the scope and potential environmental effects of SP 85 -1 are essentially the same type as, but of lesser magnitude than those of Z.C. #218, and, therefore, the initial study and negative declaration are adequate to address the potential environmental effects of SP 85 -1. 5. That a traffic study addressing both the direct and cumulative traffic impact of the project and reasonably foreseeable surrounding develop- ment was prepared as a part of the initial study and is attached to the initial study in Exhibit B. 6. That the negative declaration was properly noticed and circulated for a reasonable time prior to its consideration by the City Council in accordance with CEQA and the Guidelines. In particular, the negative declaration, including the traffic study, was circulated for at least 30 days prior to the City Planning Commission hearings and was referenced in the hearing notices for SP 85 -1, thereby giving adequate notice of its application to SP 85 -1. 7. That certain potentially significant environmental impacts of the Project were identified in the initial study. Other environmental concerns were raised during the public review of the negative declaration and the Project. These potentially significant impacts and other environmental concerns are identified in Exhibit D attached hereto and by this reference incorporated herein. 8. That on June 11, 1985, August 27, 1985 and October 22, 1985, the City Council held noticed public hearings on the negative declaration and the Project at which it took oral and documentary evidence on the potential environmental effects of the project. Resolution No. 4669 Page 2 9. That based on a thorough review of the initial study, negative declaration, and other evidence presented, the Project contains provisions and has been revised in a manner that avoids or mitigates the potentially significant environmental effects to a point where clearly no significant environmental effects will occur. Specifically, the provisions and revisions set forth in Exhibit D, attached hereto, fully avoid or mitigate all potentially significant environmental effects. 10. That there is no further substantial evidence that the project, as revised, will have a significant environmental effect. Section 2. Based on the findings stated above, the negative declaration for the Project (applications GP 85 -1 and SP 85 -1) is hereby approved. Section 3. Within five (5) days of approval and adoption of the Project by the City Council, the City Clerk is hereby directed to and shall file a notice of determination with the County Clerk of Los Angeles County pursuant to Section 21152 of the Public Resources Code. ATTEST: PASSED AND ADOPTED this 26th day of November x44- City Clerk AYES: NOES: ABSENT: Mayor 4 Council Members: Santangelo, Boggs, Cormack, Barb 1 Council Members: Davila 0 Council Members: , 1985. I HEREBY CERTIFY that the foregoing Resolution was adopted by the Downey City Council at a regular meeting thereof held on the 26th day of November , 1985, by the following vote: 9 3 TgTq BACKGROUND A. Application NumberIs) B. Loation C. Description CITY OF DOWNEY( INITIAL STUDY OF ENVIRONMENTAL IMPACTS E. Land Use - t. VIII the p rojea -result in a substantial alteration of the present or planned land use of art area? - 2.. Will the project have a substantial impact an surrounding land uses? • Is the project consistent with the General Plan Land Use designation and zoning reguiremenn? F. Population/Housing t. WUI the project attr the location. distribution, density or growth rate of the human population of the area? 2. Will the project affect the existing horsing supply. or create a demand for additional housing? • Housing units lost: Estimated population displaced Housing units proposed: Population anticipated: Exhibit B GP 85-1, Z.C. 1218 Southwest of Imperial Highway and Rives Avenue General Plan Amendment for a nine acre parcel from Public to Light Industrial, and a zone change from R1 -5000 to M-1, Light Manufacturing. 11. ENVIRONMENTAL IMPACTS Explanation of all ' yes' and "potential" answers included or attached. See-Section IV. A. Physical Environment Yee Potass do NH the project have a significant impact on the physical environment?. 1. Hydrology _ . _ _ ❑ ® ❑ 2. Air Quality ❑ ❑ 3. Geology • ❑ ❑ PS 4. Trees and Other Plants - ®• ❑ • ❑ 5. Animal Life ❑ ❑ El & Noise ❑ ❑ E 7. ArcheologiallHinorial ❑ ❑ ® . ' Will Toss of existing vegetation be adequately compensated for by conventional project landscaping? 8. Impact of Environment on Project MWII the project be subject to significant impacts from the surrounding environment? 1. Natural Environment . flood plains. seismic zones. landslide r-one areas. etc. ❑ ❑ UtI 2, Manmade Environment Disruptive noise knels„Degraded ax quality, traffic, etc. , ❑ ❑ Mi C:. Impacts an Public Services WULthe oroject have a significant impact upon, or result in a need for new or altered government services in any of the following areas? 1. Finn Protection - ❑ • 0 - 2. Police Protection - ❑ ❑ M • 3. Schools • ❑ — D 4. Parks or Other Recreational Facilities . ❑ 0 M 5. Maintenance of Public Facilities ktdudinq Roads. ❑ ❑ M B. Other Governmental Services 0 ❑ E ` 0. Impacu on Traffic/Circulation Win the project result in: 1. Generation of substantial vehicular movement? nJ • ®• ❑ • 2: A substantial impact on the surrounding circulation system? 0 ® ❑ . 3. Increased traffic hazards to motor vehicles. bicyclists or pedestrians? ❑ 0 $1 • Anticipated traffic generation- vehicle trip ends daily. ®• ❑' ❑ ❑ ❑ El ❑ • ❑ E r• ❑ Data January V. 1985 G. Energy /Utilities Yes- Potendel No 1. Will the project result in a substantial increase in the use of an energy source or require the development of new sources of energy? Q ❑ Et 2. Wn1 the project result in a need for new public utility systems or a substantial alteration to existing utilities? 0 ❑ Q H. Natural Resou►ae 1. WW the project result in a substantial increase in the rata of the of any natural resotares? 0 ❑ ID M. MANDATORY FINDINGS OF SIGNIFICANCE - A. WW impacts have the potential to degrade the quality of the environment? Q CI B . Does the project have the potential to achieve short =firm, to the disadvantage of ionp term. environmental goals? Q Q QI C. Does the project have impacts which are individually limited but cumulatively considerable? Q Q Cr D. Doss the project have environmental effects which will cause substantial adverse effects on human beings. either directly or indirectly? 0 Q W. DISCUSSION OF ENVIRONMENTAL EVALUATION II.A.1. Hydrology. Development of the site will result in a substantial portion being. covered by buildings or paving, which will decrease rainwater percolation and increase. runoff. However, proper design of the storm drainage system can direct the runoff into facilities with adequate capacity. A.4. Trees and Other Plants. The site is primarily open space, with trees interspersed. Consideration should be given to incorporating existing mature trees into the site design, particularly along the Erickson Avenue frontage. Traffic /Circulation.. Based upon a worst case development scenario of a bUU,.000 square-foot office building,.an estimated 7,380 vehicle trip ends could be generated daily. Under the present circulation system of Rancho Los Amigos,. the majority of this traffic would pass through the Imperial /Rives intersection.. Additional traffic study is- required to determine necessary traffic controls. V. DETERMINATION • On the basis of this Initial Study: Q 1 find the proposed project COULD NOT have a significant effect on the environment. and a NEGATIVE DECLARATION WILL BE PREPARED. Q 1 find that although the proposed project could have a significant effect on the environment, there will not be a-significant effect in ttti ass because the mitigation measures described herein have been added to the. project. A NEGATIVE DECLARATION WILL BE PREPARED. Q 1 find the proposed project MAY have asignifiant effect on the environment. and an ENVIRONMENTAL IMPACT REPORT is required. Spews G VI. OTHER AGENCIES AND /OR PERSONS CONSULTED Chuck Eccleston, City Traffic Engineer Harald Henriksen, City Engineer Dick Redmayne, Civil Engineer Deborah Linn, County Community Development Commission F : : Mand Aaa� March 22, 1985: Mr. Greg Shaffer Planning Department P.O. Box 607 Downey, CA 90241 Dear Mr. Shaffer: TRAFFIC & TRANSPORTATION ENGINEER!! This letter summarizes our review of traffic factors related to the proposed development of the Rancho Los Amigos site in the City of Downey. The review is based upon information provided by you and the City Traffic Engineer. The development plan is being proposed by the Community Development Commission of Los Angeles County and would generally intensify use of the 212 acre County owned land. For purposes of this study, the development has been divided into two phases. The first includes development. that would be proposed in the near future or approximately two years. Phase Il- represents the long term ultimate development plan which would require 12 years to complete. Table 1 lists the uses proposed for each phase of development and Figure 1 illustrates the -- development concept plan. For this study, the worst case condition or maximum potential development has been utilized. As an example, 600,000 square feet of office use was assumed for Parcel A while actual development could be less intensive. This approach was utilized on all future development ind4cated on the proposed plan. In addition to land use changes, the plan proposes a new roadway from the Imperial Highway /Rives Avenue intersection through the site to Garfield. An extension of Old River School Road southerly from Imperial Highway would intersect and terminate at the new road (See Figure 1). An alternate alignment would terminate the new road at Gardendale Street east of the Union Pacific Railroad. LAND USE Phase I County Courthouse Office Building (Parcel A) Table 1 PROPOSED DEVELOPMENT Rancho Los Amigos Development. PHASE II Industrial Park (Parcels B b C) Industrial Park (Parcel D) Consolidation of Hospital Facilities (Parcel H) QUANTITY 90,000 SF 600,000 SF 1,200,000 SF 50 Acres 65 Acres -Z- -3- EXISTING CIRCULATION CONDITIONS Imperial Highway is an east -west arterial extending through Los Angeles County. It has an interchange with the Long Beach Freeway (State Route 7) to the west and San Gabriel River Freeway (I -605) to the east. Adjacent to the site, Imperial Highway provides three lanes in each direction with separate left turns lanes.. There are signalized intersections at Old River School Road and Rives Avenue. An overpass of Imperial Highway exists for Erickson Avenue. Old River School Road is a north -south arterial with four lanes'of traffic that extends from Imperial Highway to Florence Avenue. Rives Avenue is a two -'ane street with residential frontage that serves as a residential collector. Based upon data provided by the City Traffic Engineer, daily traffic volumes on Imperial Highway are approximately 37,200 adjacent to the site. Since peak hour intersection operations are the best indicators of traffic conditions, Intersection Capacity-Utilization (ICU) analyses were completed for both AM and PM peak hours on Imperial Highway at Old River School Road and Rives Avenue. (The ICU methodology and relationship of ICU to Level of Service are described in Appendix A.) Existing traffic volumes were provided by the City Traffic Engineer and are contained in Appendix B with the ICU calculations. — The results of these ICU analyses are summarized in Table 2.. Review of Table 2 indicates that current traffic operations are good even with a relatively high traffic volume on Imperial Highway. TRIP GENERATION In order to examine project traffic factors, it is necessary to estimate the number of trips that would be generated. Studies have been conducted by governmental agencies and consultants to determine trip generation characteristics of various land uses. The rates utilized in this study are listed in Table 3 and are based upon data in the Institute of Transportation Engineers publication "Trip Generation" and data from the Orange County Environmental Management Agency. By applying these rates to the planned development, estimates of project trip generation were obtained. 3 n NO SCALE QUILL OR. ` • 7 -/ PARCEL 8. 57 ACRES 114% / \ YEARS 3,4,5 1 O 9 PARCEL C 10 ACRES YEAR 3 PARCEL 0 50 ACRES YEARS 11,12 ERICKSON AVE PROPOSED SITE DEVELOPMENT PROPOSED PARCEL A II • ue Np ; �' a1P L COURT P 1 9 ACRES II /1 t i YEAR 2 HOSPITAL CONSTRUCTION YEARS 5 -10 OCCUPANCY YEAR 10 65 ACRES GAROENOALE ST. ANIIIMINOM73 DIRECTIONAL. DISTRIBUTION PHASE I // � SITE 20% • N NO SCALE • 5% 25 %�, IP °I, 27•I. p '� W 3% 5% N QUILL OR. DIRECTIONAL DISTRIBUTION PHASE TT IMPERIAL HIGHWAY. -s 15% GARDENDALE s+. —N� NO SCALE t • cc 0 o O c 100 z � 4200 r 5400 // STE ' ° - O O M 1C) 2300 / 4500 IMPERIAL HIGHWAY 3000 9 C ' � 4 o c �' � , � F t‘C/ - a, F c PROJECT DAILY TRIPS PHASE I O QUILL DR. / GAROENOALE ST. /. s �N NO SCALE s cc v N cc >O cc O g 300 2 8 0 0 ( ' 0 P 8� C c0 m 0 _ V1 Ce 200 QUILL DR 0 0 .loo 6700 5 , t / 5400 5796 • 1 - z 0 a o O M 0 0 ti 2ROJECT DAILY VOLUMES ,PHASE II IMPERIAL HIGHWAY 3200 GAROENOALE ST. -- INTERSECTION Imperial Highway and Rives Avenue (1) Intersection Capacity Utilization (2) Level of Service Table 2 EXISTING ICU SUMMARY Rancho Los Amigos Development -4- ICU VALUES AM Peak Hour PM Peak Hour ICU LOS ICU LOS Imperial Highway and Old River School Road 0.56 A 0.58 A Table 3 ' TRIP GENERATION RATES Rancho Los Amigos Development 0.50 A 0.61 B LAND USE DESCRIPTOR TRIP ENDS PER DESCRIPTOR Daily AM In AM Out PM In PM Out Courthouse (1) SF 25 2.00 0.25 0.89 1.96. Office (2) ) SF 12.3 1.86 0.35 0.27 1.36 Industrial Park (2) SF 7.0 0.54 0.16 0.19 0.59 Industrial Park (2) Acres 62.8 10.1 3.2 3.0 9.4 (1) Source: Orange County for daily; peak hour rates based on splits for government office and Civic Center in ITE Trip Generation. —(2) Source: "Trip Generation ", Institute of Transportation Engineers Table 4 summarizes the estimated daily, AM peak hour and PM peak hour trip generation for the development. An estimated 9,630 daily trip ends would be generated by Phase I. An additional 11,540 daily trip ends would be generated by Phase II with a total potential of 21,170'daily trip ends. No trip generation has been indicated for the hospital consolidation in Parce' H. Hospital generated trips are a part of the existing traffic population any • are included in the analysis on that basis. Consolidation of hospital facilities could change trip generation characteristics and should be examined when sufficient planning data are available. TRIP DISTRIBUTION AND ASSIGNMENT The next step in the study was to develop a geographic trip distribution pattern for the site. Since construction of the Century Freeway (I -105) would effect travel patterns in the area, two distributions were developed. The directional distribution developed for Phase I is illustrated on Figure 2 and does not include the Century Freeway. For Phase II, it was assumed that the Century Freeway was completed and the distribution is illustrated on Figure 3. These distributions are based upon regional land use and circulation patterns: Daily project traffic was then assigned to the street system in conformance with the distribution patterns: The Phase I daily volumes are illustrated on Figure 4 and Phase II are illustrated on Figure 5. Phase I AM and PM peak hour volumes were assigned to the Imperial Highway at Old River School Road _ and Rives Avenue intersections utilizing the distribution on Figure 2. These project volumes are indicated in the table in Appendix B. ANALYSIS Phase I - The analysis of Phase I traffic has been completed to provide an evaluation of the ability of the existing and planned road system to accommodate project traffic. Estimates of daily and peak hour traffic and assignment of these trips to the road system have been presented in previous sections of this report. The analyses arP hac - ' • Table 4 TRIP GENERATION Rancho Los Amigos Development -6- LAND USE - TRIP ENDS Daily AM In AM Out PM In PM Out PHASE r County Courthouse (90,000 SF) 2,250 180 20 80 175 Parcel A: 600,000 SF Office 7,380 1,150 210 160 815 Subtotal 9,630 1,295 230 240 990 Phase II Parcels 8 & C: 1.2 Million SF 8;400 650 190 230 710 Industrial Park Parcel D: 50 Acres Industrial 3,140 505 160 150 470 Park Subtotal 11,540 1,155 350 380 1,180 Total -- 21,170 2,450 580 620 2,170 Table 5 ICU SUMMARY Rancho Los Amigos Development ICU VALUES INTERSECTION PERIOD Existing Existing Existing + +' Project Pro,iect With Mitigation Imperial Hwy & Old River. AM Peak Hour School Road PM Peak Hour Imperial Hwy & Rives Ave. AM Peak Hour PM Peak Hour 0.56 0.58 0.50 0.61 0.61 0.68 0.87 0.95 0.53 0.74 0.83 0.79 -8- The intersections on Imperial Highway at Old River School Road and Rives Avenue are the critical locations in examining potential traffic impacts. ICU analyses were completed for conditions with Phase I traffic for both intersections and for both AM and PM peak hours. These analyses are contained in Appendix 8 and summarized in Table 5. Each of these intersections was examined to evaluate the potential traffic impacts of the project. Review of ICU values for Imperial Highway and Old River School Road indicates that the existing geometrics could accommodate. project traffic. As indicated in Appendix B, the -northbound left turn during the PM peak hour is projected to be 327 vehicles. This volume exceeds the desirable capacity of a single left turn lane and the use of an optional through or left lane in addition to left and right turn lanes is recommended. In addition, a separate traffic - signal phase would be required for northbound left turns. It is recommended that the existing traffic signal be modified to provide split phasing in the north -south direction. With these mitigation measures, acceptable traffic operations would be anticipated. The Imperial Highway and Rives Avenue intersection would have an acceptable ICU value (less than 0.90) during the AM peak hour but not the PM peak hour. The provision of an additional northbound lane and split phasing for • the north -south movement would reduce the PM peak hour ICU value to 0.79 which is an acceptable condition. Review of the AM peak hour ICU analyses indicates an additional problem. The project westbound left turn volume for the AM peak hour is 584 vehicles. While the ICU analysis indicates an acceptable condition, this left turn demand would result in operational problems. A queue of this magnitude would block access to other properties and create an overall undersirabie condition. Provision of a second westbound left turn lane would mitigate the problem; however, this cannot be accomplished with the existing right -of -way. The existing traffic signal would require modification to provide seperate left turn phasing on Imperial Highway as well as split phasing for north -south traffic. Another alternative to reduce traffic impacts at the Imperial Highway /Rives venue intersection was received. This alt ernative 1L Highway. Traffic from both problem movements, the westbound left and northbound right, could be diverted to this partial interchange. This diversion would result in acceptable conditions at the Imperial Highway /Rives intersection without widening Imperial Highway. The previously recommended signal modifications would still be required. In summary, the Phase I development can be accommodated with the recommended mitigation measures. Table 6 summarizes these recommendations. This analysis has assumed that Old River School Road and Rives Avenue south of Imperial Highway would have a minimum of four lanes and that an east -west connection between Rives AVenue and Old River School Road would be provided. Phase II - For this study, Phase II represents ultimate development of the site as illustrated on Figure 1. Due to the general level of data available, the analysis of Phase II traffic factors is in less detail than Phase I. The results of the Phase I analysis do provide information that is also applicable to Phase II. A major circulation element of the plan is the development of a major roadway — from the Imperial Highway /Rives Avenue intersection through the site to Garfield Avenue. This concept raises some traffic questions which must be addressed. As indicated in The Phase I analysis, the Imperial Highway /Rives Avenue intersection is a potential problem that will require mitigation for Phase I development. The proposed plan would consolidate hospital activities in the south portion which.would change traffic patterns. While no data were provided to evaluate changes in hospital traffic, it can be assumed that the hospital usage of the Rives Avenue intersection would increase. Another concern is the residential nature of Rives Avenue northerly of the site. The introduction of through traffic would not be desirable on Rives Avenue. All of these considerations would indicate that a major roadway should not terminate at the Rives Avenue intersection. LOCATION RECOMMENDED MITMATION Table 6 SUMMARY OF PHASE I MITIGATION Rancho Los Amigos Development - Imperial Hwy & Old River School Road • 1. Modify traffic signal to provide split north -south phasing. Imperial Highway and Rives Avenue 2. Provide three northbound approach lanes (left, left or through and through or right). 1. Modify traffic signal to provide left turn phasing on Imperial Hwy and split north -south phasing. 2. Widen Imperial Hwy east of Rives to provide two westbound left turn lanes. 3. Provide three northbound approach lanes (left, through or right and right). Imperial Highway and Erickson Avenue. 1. In place of 2 at Imperial Highway and Rives Avenue, provide westbound off and eastbound on ramps. The Phase I analysis has indicated that the Imperial Highway /Old River School Road intersection would have available capacity to accommodate additional development. In addition, Old River School Road to the north has available capacity and is an arterial street. Based upon traffic consideration, the major internal roadway should be an extension of Old River School Road. The potential for a partial interchange on Imperial Highway at Erickson Avenue was proposed in the Phase I analysis. Further development of this concept is recommended to serve the ultimate plan. An interchange would serve Phase I development, the hospital.consolidation and future redevelopment north of Imperial Highway. It would also take advantage of the existing overpass structure. There are concerns with the extension of the major road to Garfield Avenue. This extension assumes an at -grade crossing of the Union Pacific Railroad which would require permission of the California Public Utilities Commission and the Railroad. Based upon current practice, it is doubtful that this crossing could be achieved. An alternative alignment would terminate the street on Gardendale Street east of :the railroad crossing. This connection to Gardendale Street would provide good access to the future Century Freeway which has a split interchange on Paramount Boulevard and Garfield Avenue. Another potential problem with the new intersection on Garfield Avenue is the location with respect to the Gardendale Street intersection. Sufficient data are not available to analyze this condition; however, the proximity of these intersections could result in traffic operational and safety problems. In general', this review of the Phase II development has identified potential traffic related problems. These potential problems indicate the need for the input of traffic considerations in the planning process. Additional data are required and additional analyses. The development of a 212 acre site in an urban area requires detailed analysis of traffic considerations in the preparation of a plan. It is felt that the development can be accommodated with the necessary consideration of traffic and circulation needs in the design. SUMMARY The following are principal findings of the study. -12- This study has examined traffic factors related to the proposed development of Rancho Los Amigos site in the City of Downey. The study has been completed for two phases of development. Phase I is the near term development and has been analyzed in detail. For Phase II or ultimate development, a more general review was completed. Existing conditions were quantified and estimates made of future trip generation from the site. The ability of the road system to accommodate project traffic and the circulation elementof the plan were analyzed. Potential problems were identified with both Phase I and Phase II of the plan. Mitigation measures have been recommended which would reduce the potential traffic impacts of the project. 1. Existing traffic operations on Imperial Highway are at acceptable Levels of Service. 2. Phase I of the project is estimated to generate 9,630 daily trip ends with 1,525 occurring during the'AM peak hour and 1,230 occurring during the PM peak tour.. 3. At ultimate development, the site is estimated to generate 21,170 daily trip ends with 3,030 occurring during the AM peak hour and 2,790 during the PM peak hour excluding hospital traffic. 4. With Phase I development, traffic mitigation measures would be required at the Imperial Highway intersections with old River School Road and Rives Avenue. 5. The ultimate plan has evidently not included traffic considerations and requires modification to reduce traffic related impacts. MITIGATION MEASURES The following measures are recommended to mitigate potential traffic impacts of the project. t 1. The improvements listed in Table 6 should be a part of the Phase l^" development. 2. The ultiimate plan should be reexamined with consideration for the potential traffic impacts including site access, internal circulation and area traffic operations. We trust that this study will be of assistance to the City of Downey in reviewing this development. If you have any questions or require additional information, please contact us. Respectfully submitted, WESTON PRINGLE & ASSOCIATES Weston 5. Pringle, P.E. Registered Professional Engineer State of California Numbers C16828 & TR565 WSP:bas #85210 s : -13- APPENDIX A APPENDIX A EXPLANATION OF INTERSECTION CAPACITY UTILIZATION The capacity of a street is nearly always greater between intersections and less at intersections. The reason for this is that the traffic flows continuously between intersections and only part of the time at intersections. .To study intersection capacity, a technique known as Intersection Capacity Utilization (ICU) has been developed. ICU analysis consists of (a) determining the pro- portion of signal time needed to serve each conflicting movement, (b) summing the times for the movements, and (c) comparing the total time required to the time available. For example, if for north -south traffic the northbound traffic is 1,000 vehicles per hour, the southbound traffic is 800 vehicles per hour, and the capacity of either approach is 2,000 vehicles per hour of green, than. the northbound traffic is critical and requires 1,000/2.000 or 50 percent of the signal time. If for the east -west traffic, 40 percent of the signal time is required, then it.can be seen that the ICU is 50 plus 40, or 90 percent. When left -turn phases exist, they are incorporated into the analysis. As ICU's approach 100 percent, the quality of traffic service approaches Level of Service(I.OS E, as defined in the Highway Capacity Manual, Special Report 87, Highway Rasearoh Board, 1965. Level of Service is used to describe quality of traffic flow. Levels of Service A to C operate quite well. Level of Service D is typically the Level of Service for which an urban street is designed.. Level of Service E is the maximise volume a facility can accommodate and will result in possible stoppages of. momentary duration. Level of Service F occurs when a facility is overloaded._. - and is characteriked by stop - and -go traffic with stoppages of long duration. , A description of the various lavels of service appears on the following page. Tha ICU calculations assume that an intersection is signalized and that the signs is ideally'timed. Although calculating ICU an unsignalized intersections is not valid, the presumption is that a signal can be installed and the calculation shows whether the geometrics are capable of accommodating the expected volume. It is possible to have an ICU well below 1.0, yet have severe traffic congestion. This would occur because ate or more movements is not getting enough time to satisfy its demand with excess time existing on other moves. Capacity is often defined in terms of roadway width. However, standard lanes have approximately the same capacity whether ttey art 11 foot or 14 foot lanes. Our data indicates a typical lane, whether a through lane or left -turn lane has a capacity of approximately 1600 vehicles per lane per hour or green time. The Highway Capacity Manual found capacity to be about 1500 vehiclas per lana per hour of green for through lanes and 1200 vehicles per lane per hour of green for left -turn Lanes. However, the capacity manual is based on pre -1965 data, and recant studies and observations show higher capacities in the southern California area. For this study a capacity of 1600 vehicles per lane has been assumed for through traffic, and 1600 vehicles per lane for turning lanes. - Level of TRAFFIC QUALITY Nominal Range Service of ICU (a) A • Low volumes; high speeds; speed not restricted 0.00 0 60 by other vehicles; all signal cycles clear with no vehicles waiting through more than one signal cycla. B Operating speeds beginning to be affected 0.61 -- 0.70 by other traffic; between one and tan percent of the signal cycles have one or more vehicles which wait through more than one signal cycla during peak tratfic.periods. C Operating speeds and maneuverability closely 0.71 - 0.80" controlled brother traffic; between 11 and 30 percent of :ha signal cycles have ons or more vehicles which wait through more than one signal cycle during peak traffic periods; recommended ideal design standard. D Tolerable operating speeds; 31 to 70 percent 0.81 - 0.90 of the signal cycles have one or or vehicles which wait through more than one signal cycla during peak traffic periods; often used as design standard in urban areas. E F APPENDIX A. LEVEL OF SERVICE DESCRIPTIONS Capacity; the maximise traffic volume an inter- 0.91- 1. section can accommodata; restricted speeds; 71 to 100 percent of the signal cycles have one or more vehicles which wait through mots than one signal cycle during peak traffic periods. Long quauas of traffic; unstable flow; stoppages of long duration; traffic volume and traffic speed can drop to zero; traffic volume will be less than the volume which occurs at Level of Servica E. (a) ICU (Intersection Capacity Utilization) ac various level of service versus level of service E for urban arterial strsecs. Not Meaningful Source: Highway Capacity Manual, Highway Research Board Special Report 87, National Academy of Sciences, Washington D.C., 1965, page 320. 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As stated in the determined that the project will not have L.A. County Clerk P.O. Box 151 Corporation Division, Room 106 . Los Angeles, CA 90053 on Sahib it C General Plan Amendment for a 14 .acre parcel from Public to Light Industrial, and a zone change from R1 -5000 to M-1, Light Manufacturing. • The City of Downey has conducted an Initial Study of Environmental Impacts fc the above referenced project in accordance with guidelines for the implencnta tion of the California Environmental Quality Act. Based on this Initial Stud a copy of which is attached, Negative Declaration status is granted for this project because it is found that CD there is no substantial evidence that the project may have a signif cant effect on the environment. © revisions have been incorporated into the project to ivoid sigx�� -fic; effects on the environment which could otherwise occur. These Ere~ specified as mitigation measures in the Initial Study. -- This determination is not final until approved by the decision - making body. above Negative Declaration, it has be a significant effect on the environme Office of Planning & Resew 1400 Tenth Street, Room 12' Sacramento, CA 95814 Where Issue Identified 1.. Initial Study 2a. Initial Study Exhibit D Mitigation Measures Adopted 1. The Initial Study proposed as a mitigation measure that con- sideration be given to incor- porating existing mature trees into the site design, parti- cularly along the Erickson Avenue frontage. The Specific Plan was revis to include a requirement th "where possible, existing mature trees shall be incor- porated into the site design or relocated on site." 2a. The Initial Study included a traffic study which estab- lished specific mitigation measures. The traffic study assessed cumulative traffic impacts based on the "worst case" development condition on Parcal A, development of the courthouse, all other existing conditions (Phase I), and impacts anticipated from ulti- mate development of Parcels 13, C, and D and a new hospital facility on Parcel H. Based on most current information available, the traffic study - contained the following con- clusions and proposed mitige tion. measures: Conclusions: Phase I - Potential problems could be created at the inter- sections of Imperial Highway and Rives Avenue and Imperial Highway and Old. River School Road. Environmental Where Issue Issue Identified Mitigation Measures Adopted Mitigation Measures: Location: Imperial Hwy & Old River School Road - Modify traffic signal to provide split north -south phasing. Provide three northbound approach lanes (left, left or through and through or right). Location: Imperial Highway and Rives Avenues - Modify traffic signal to provide left turn phasing on Imperial Hwy and split north -south phasing. - Widen Imperial Hwy east of Rives to provide two west - bound left turn lanes. - Provide three northbound approach lanes (left, through or right and right). Location: Imperial Highway and Erickson Avenue - In place of widening of Imperial Highway east of Rivers, at Imperial High- way and Rives Avenue, pro- vide westbound off and eastbound on ramps. The mitigation measures were incorporated into the Specific Plan as follows: (i) The extension of Old River School Road south of Imperial Highway shall be constructed as a secondary highway with an 80 foot right -of -way and 64 foot curb to curb width. Environmental Where Issue Issue Identified Mitigation Measures Adopted (ii) The signalization at Old River School Road and Imperial Highway shall be modified to provide split north /south phasing. To the south of the inter- section with Imperial Highway, Old River Scho Road will have five lanes: two southbound, one northbound left turn, one northbound optional left or through, and one . northbound optional right or through. (iii) The extension of Rives Avenue south of Imperial Highway shall be con- structed as a collector street with a curb to curb width of 54 feet. Sixty - four feet of right -of -way shall be reserved except that portion immediately south of Imperial Highway where 80 feet of right -of- way is required for inter- - section channelization. The requirement may be modified by the City ba:'i on engineering studies. (iv) The signalization at Rives Avenue and Imperial Highway shall be modified to provide left turn phas- ing. To the south of the intersection with Imperial Highway, Rives Avenue- will have five lanes: two southbound, one northbound left and two northbound right. Through access onto Rives Avenue north of Imperial Highway from the Rancho property as disallowed. Environmental Where Issue Issue Identified Mitigation Measures Adopted (v) With the development of Parcel A and the court- house, sufficient right-of- way shall be reserved for construction of a four -=way off and on ramp system at the existing bridge over Imperial Highway. (vi) If the development on Parcel A exceeds 300,000 square feet of floor area, the two easterly ramps to and from the Erickson bridge shall be constructed. This requirement may be modi- fied by the City based on engineering and /or environmental studies. 4 2b. )eemphasize Community, use of Rives Avenue and limit its purpose to serve Parcel A primarily and rest of site secondarily 2c. Traffic Noise 2b.Staff, Planning Commis- sion, Council 2c.Staff, Commu- nity, Planning Commission, Council (vii) Prior to issuance of any certificate of occupancy for development on Parcel B or C, a four -way ramp system shall be con- structed to and from the Erickson bridge. This requirement may be modi- fied by the City based on engineering and /or environmental studies. 2b. Mitigation Measures described in 2. above were included as conditions of development in the Specific Plan. 2c. Mitigation measures were incorporated into the Specific Plan as follows: Environmental Issue 3 Land Use Project will result in a substantial alteration of the present or planned use of the area Area will change from vacant "pub- lic" land use designation zoned R1 -5000 to a "light industrial" designation Where Issue Identified 3. Initial Study Community, Planning Commission, Council. Mitigation Measures Adopted (i) Commercial vehicles over 6,000 pounds weight, as registered by the Department of Motor Vehicles, are prohibited on Rives Avenue south of Imperial Highway. - (ii) A noise attenuation bar rier shall be placed to the east of Rives Avenue. This barrier may consist of a wall, berming, and . landscaping, and shall be prepared by a licensed acoustical engineer. Further, landscaping materials should be used which will reach a height of 20 to 30 feet at maturity to provide visual screening. 3. The Staff Report for the General Plan amendment dis- cussed the existing conditions and surrounding uses. The Specific Plan was recommended for implementation of the general plan amendment. The Specific Plan considers some proposed uses as compatible with surrounding uses, whicl are therefore listed as "per- mitted". Additional uses, . such as wholesale trades, research and development and manufacturing uses, are per- mitted only subject to approval of a Conditional Use Permit. The Conditional Use Permit process allows careful review of the uses which have the potential for creating problems for adjacent properties to ensure those problems do not occur. Before a Conditional Use Permit is granted, the following findings must be made: Environmental Where Issue Issue Identified Mitigation Measures Adopted (i) That the requested Condi- tional Use Permit will not adversely affect the pur- pose and intent of this Chapter or the City's General Plan or the public convenience or general welfare of persons resid- ing or working in the neighborhood thereof; (ii) That the requested use will not adversely affect the adjoining land uses and the growth and devel- opment of the area in which it is proposed to be located; (iii) That the size and shape of the site proposed for the use is adequate to allow the full development of the proposed use in a man- ner not detrimental to the particular area; and (iv) That the traffic generated by the proposed use will . not impose an undue burden upon the streets and high - - ways in the area. The Specific Plan also pro- vides that the interpretation of the permitted uses as described in the Plan shall be governed by section 9156 of the Downey Municipal Code except that said determina- tionslshall be made at a pub - licly!noticed hearing of the Planning Commission. The Plan also includes a requirement that the Planning Commission and Design Review Board shall approve a master site plan for Parcel A prior to issuance of any building permits. These controls will prevent the introduction of noncompatible uses. Environmental Where Issue Issue Identified Mitigation Measures Adopted 4. Hydrology "Development of the site will result in a sub- stantial portion being covered by buildings or paving, which will decrease rainwater perco- lation and increase runoff 5. Energy/ 5. Council, Utilities Community Concern expressed over adequacy of existing water delivery system to site; a request was made for this to be addressed in the Specific Plan 6. Question raised as to how regulate noise from daily activities of uses within business park 4.Initial Study 6. Staff, Community, Planning Commission 4. Initial study specifies that proper design can direct the runoff into facilities with adequate capacity. This con - clusion was incorporated into the Specific Plan as a cond�- tion of development as foll s: A storm drain shall be inst, - led adequate to serve ultimate development of the site and shall be connected with the existing Los Angeles County Flood Control District system at Old River School Road. 5. A condition of development in the Specific Plan which addresses this issue is as follows: Sufficient water flow for fire protection shall be acquired from the City of Downey Water Division and /or the Metropolitan Water District. . 6. The following conditions of development included in the Specific Plan avoid this problem: (ii) A noise attenuation bar- rier shall be placed to the east of Rives Avenue. This barrier may consist of a wall, berming, and landscaping, and shall be prepared by a licensed acoustical engineer. Further. landsc nine (i) All development on Parcel A shall be subject to all applicable sections of the Code of Ordinances of the City of Downey pertaining to noise regulations (See Sec- tion 4600 -4606 of the Downey Municipal Code). Environmental Issue 7. Concern over _. potential use of hazardous materials on the site was expres- sed and the question as to how to regulate their use was posed 8. Aesthics 8. Community, Issue was Staff raised relative to off -site views from from Imperial Highway and from adjacent residences located to the east Where Issue Identified 7. Staff, Plan- ning Commis- sion, Community Mitigation Measures Adopted materials should be used which will reach a height of 20 to 30 feet at maturity to provide visual screening. 7. The following conditions of development which add ;ess this concern are included in Specific Plan: Environmental Protection Standards - See Sec- tion 9144 of the Downey Municipal Code. 8. The Specific Plan Development Standards address this concern as follows: 1. Maximum building site . coverage shall be 40% of the net area. 2. Maximum building height shall be as follows: Setback from Residential Zone Less than 140 feet 140 to 200 feet 200 to 250 feet 250 to 400 feet 400 feet or more Maximum Building Height No buildings 35 feet 45 feet 55 feet. 75 feet 3a. Building and parking areas shall be set back 20 feet from the ultimate right -of -way of all streets, except that 30 feet setback from Imperial Highway shall be maintained. b. Improvement permitted within the setback areas: Landscaping Pedestrian Sidewalks Environmental Where Issue Issue Identified Mitigation Measures Adopted Planters, fences or walls with the stipulation that said improvements cannot exceed 3 -1/2 feet in height. Paving associated with street improvements (curbs, etc.) 5. Signs: Driveway access points. 4. Parking: Parking requirements shall conform to Section 9150 of the Downey Municipal Code (parking ordinance) with the exception of the fol- lowing: a. Parking adjacent to the streetside landscaped areas shall be designed to prevent car overhangs. b. A minimum of 5% of the paved parking area shall be landscaped. c. A minimum of one tree pe 16 spaces shall be required in the parking area. The required trees shall be a "canopy" type to provide a shaded park- ing area. Trees shall be planted at a reasonable size to insure survival, staked, and of a species compatible with the Southern California climate. Signage shall be in accordance with Sec- tion 9148 of the Downey Municipal Code. A sign program shall be submitted Environmental Where Issue Issue Identified Mitigation Measures Adopted and approved by the Desigr Review Board in accordance with Section g148.14(e) pertaining to multi- tenant complexes. 6. Noise Attenuation: A noise attenuation bar- rier shall be placed to the east of Rives Avenue. This barrier may consist of a wall, berming, and landscaping, and shall be prepared by a licensed acoustical engineer. Further, landscaping materials should be used which will reah a height of•20 to 30 feet at maturity to provide visual screening. 7. All development within Parcel A shall be subject to all applicable sections of the Code of Ordinances of the City of Downey per- taining to noise regula- tions. (See Sec- tion 4600 -4606 of the Downey Municipal Code). 8 a. Transformers and emergency generators shall be screened. b. Where possible, trash and transformer enclosures shall be integrated into the same enclosure. c. Transformers may be screened from view by using landscape screening devices, such as 5 gallon shrubs at 3 feet on center (minimum). Environmental Where Issue Issue Identified Mitigation Measures Adopted d. Trash enclosures are not • permitted within the streetside setback. 9. Lighting - See Sec- tion 9152 of the Downey„_ Municipal Code. 10. Walls - See Section 915 of the Downey Municipal Code. 11. Security Fences: Security fences shall be constructed of wrought iron. Pilasters along property lines are pro- hibited. The use of addi- tional shrub masses along fences is encouraged. Chain link fencing is prohibited. 12. Service and Delivery Areas: a. Loading docks and service delivery areas are required to be screened, recessed, and /or enclose,$, so as not to be directlj visible from streets at the boundary of the site b. Trash enclosures shall be screened with a structure and constructed of the same materials and finishes as the adjacent building. c The use of additional landscape materials to screen the trash enclosure walls is encouraged. d. No materials, supplies or equipment, including company owned or operated trucks, shall be stored in any area on a site except Environmental Where Issue Issue Identified Mitigation Measures Adopted inside a closed building or behind a visual barriez e. Loading, service and delivery areas shall not encroach into any setback areas. 13. Site Landscaping and Maintenance: a. A landscape plan shall be required which incor- porates a compatible planting palette and materials to insure land- scaping consistency. b. A minimum of 10% site landscaping is required. c. Along site boundaries, a minimum tree size of 15 gallons shall be utilized for tree planting purposes and where pos- sible, 24 inch box trees shall be planted within the building setback areas, d. Where possible, existing mature trees shall be incorporated into the site design or relocated on site. e. Maintenance of on -site and boundary landscaping shall be the responsibility of the developer. Landscap- ing shall be adequately trimmed, watered, and otherwise maintained to insure a pleasing appear- ance of the site. A landscaping maintenance plan shall be submitted as part of the landscape and irrigation plan. Environmental Where Issue Issue Identified Mitigation Measures Adopted 9. Patient Safety 9. Community Commission Council 10. School Pedes- trian Safety at We t Middle School on Old River' School Road Located North of Imperial Hwy: Increased use of old River School Road will jeopar- dize pupil safety 10. Community 14. Irrigation: a. An adequate irrigation system shall be installed as part of the required site landscaping. b. All irrigation systems shall be fully automat . c. Low - volume irrigation equipment is encouraged for all planted areas within the individual sites and shall be com- pletely automatic. d. No overthrowing of irriga- tion water onto walks, roadways or common area will be allowed. e. Utility cabinets and irri- gation hardware shall be screened by evergree shrubs. 9. The following provision is included in the Specific. Pln: Until such time that public use of Erickson Avenue is allowed, the portion adjunc to Parcel A, signing and striping shall be installed to restrict its use to medical center patients and the court- house bus. 10. City staff has addressed this issue in its present schedule of public improvements which includes installation of flashing yellow lights at the Old River School Road crosswalk. EXHIBIT °C° CITY OF DOWNEY PLANNING DIVISION 11111 Brookshire Avenue Downey, California 90241 Project Number: GP 85 -1, Z.C. #218 Location: Southwest of Imperial Highway and Rives Avenue Project Title /Description: NEGATIVE DECLARATION ORIGINAL FILED NOV271..5 COUNTY CL K General Plan Amendment for a 14 acre parcel from Public to Light Industrial, and a zone change from R1 -5000 to M -1, Light Manufacturing. The City of Downey has conducted an Initial Study of Environmental Impacts for the above referenced project in accordance with guidelines for the implementa- tion of the California Environmental Quality Act. Based on this Initial Study, a copy of which is attached, Negative Declaration status is granted for this project because it is found that n there is no substantial evidence that the project may have a signifi- cant effect on the environment. © revisions have been incorporated into the project to avoid significant effects on the environment which could otherwise occur. These are specified as mitigation measures in the Initial Study. This determination is not final until approved by the decision - making body. ® NOTICE OF DETERMINATION The above referenced project was approved on November 26, 1985 by the City Council of the City of Downey (decision- making body). As stated in the above Negative Declaration, it has been determined that the project will not have a significant effect on the environment. L.A. County Clerk P.O. Box 151 Corporation Division, Room 106 Los Angeles, CA 90053 Office of Planning & Research 1400 Tenth Street, Room 121 Sacramento, CA 95814 •`; Environmental Issue 1. Trees and Plants 2a. Traffic and Circulation Where Issue Identified 1. Initial Study 2a. Initial Study Exhibit D Mitigation Measures Adopted 1 The Initial Study proposed as a mitigation measure that con- sideration be given to incor- porating existing mature trees into the site design, parti- cularly along the Erickson Avenue frontage. The Specific Plan was revised to include a requirement that, "where possible, existing mature trees shall be incor- porated into the site design .or relocated on site.' 2a. The Initial Study included a traffic study which estab- lished specific mitigation measures. The traffic study assessed cumulative traffic impacts based on the "worst case" development condition on Parcal A, development of the courthouse, all other existing conditions (Phase I), and impacts anticipated from L mate development of Parcel.. C, and D and a new hospital facility on Parcel H. Based on most current information available, the traffic study contained the following con- clusions and proposed mitiga- tion measures: Conclusions: Phase I - Potential problems could be created at the inter- sections of Imperial Highway and Rives Avenue and Imperial Highway and Old. River School Road. Where Issue Identified Mitigation Measures Adopted Mitigation Measures: Location: Imperial Hwy & Old River School Road Modify traffic signal to provide split north -soy -- phasing. Provide three northbou approach lanes (left, left or through and through or right). Location: Imperial Highway and Rives Avenues - Modify traffic signal to provide left turn phasing on Imperial Hwy and split north -south phasing. - Widen Imperial Hwy east of Rives to provide two wes bound left turn lanes. Provide three northbound approach lanes (left, through or right and right). Location: Imperial Highwa. and Erickson Avenue - In place of widening of Imperial Highway east of Rivers, at Imperial High- way and Rives Avenue, pro- vide westbound off and eastbound on ramps. The mitigation measures wer_ incorporated into the Specifi- Plan as follows: (i) The extension of Old River School Road south of Imperial Highway shall be constructed as a secondary highway with an 80 foot right -of -way and 64 foot curb to curb width. Where Issue Environmental Issue Identified Mitigation Measures Adopted (ii) The signalization at Old River School Road and Imperial Highway shall be modified to provide split north /south phasing. To the south of the inter- section with Imperial Highway, Old River School Road will have five lanes: two southbound, one northbound left turn, one northbound optional left or through, and one northbound optional right or through. (iii) The extension of Rives Avenue south of Imperial Highway shall be con- structed as a collector street with a curb to curb width of 54 feet. Sixty - four feet of right -of -way shall be reserved except that portion immediately south of Imperial Highway where 80 feet of right-of- way is required for inter- section channelization. The requirement may be modified by the City based on engineering studies. (iv) The signalization at Rives Avenue and Imperial Highway shall be modified to provide left turn pha^ ing. To the south of t intersection with Imperi_ Highway, Rives Avenue will have five lanes: two southbound, one northbound left and two northbound right. Through access onto Rives Avenue north of Imperial Highway from the Rancho property as disallowed. Environmental Where Issue Issue Identified Mitigation Measures Adopted 2b. Deemphasize Community, use of Rives Avenue and limit its purpose to serve Parcel A primarily and rest of site secondarily . Traffic Noise 2b.Staff, Planning Commis- sion, Council 2c.Staff, Commu- nity, Planning Commission, Council (v) With the development of Parcel A and the court- house, sufficient right -of way shall be reserved for construction of a four -way off and on ramp system at the existing bridge ova Imperial Highway. (vi) If the development on Parcel A exceeds 300,000 square feet of floor area, the two easterly ramps to and from the Erickson bridge shall be constructed. This requirement may be modi- fied by the City based on engineering and /or environmental studies. (vii) Prior to issuance of any certificate of occupancy for development on Parcel B or C, a four -way ramp system shall be con- structed to and from the Erickson bridge. This requirement may be modi- fied by the City based on engineering and /or -- environmental studies. 2b. Mitigation Measures described in 2. above were included as conditions of development in the Specific Plan. 2c. Mitigation measures were incorporated into the Specific Plan as follows: Environmental Issue 3. Land Use Project will result in a substantial alteration of the present or planned use of the area Area will change from vacant "pub- lic' land use designation zoned R1 -5000 to a "light industrial" designation Where Issue Identified 3. Initial Study Community, Planning Commission, Council Mitigation Measures Adopted (i) Commercial vehicles over 6,000 pounds weight, as registered by the Department of Motor Vehicles, are prohibited on Rives Avenue south of Imperial Highway. (ii) A noise attenuation bar- rier shall be placed to the east of Rives Avenue. This barrier may consist of a wall, berming, and landscaping, and shall be prepared by a licensed acoustical engineer. Further, landscaping materials should be used which will reach a height of 20 to 30 feet at maturity to provide visual screening. 3. The Staff Report for the General Plan amendment dis- cussed the existing condition: and surrounding uses. The Specific Plan was recommende6 for implementation of the general plan amendment. The Specific Plan considers some proposed uses as compatible with surrounding uses, which are therefore listed as "per- mitted". Additional uses, such as wholesale trades, research and development and manufacturing uses, are per mitted only subject to appr, of a Conditional Use Permit. The Conditional Use Permit process allows careful review of the uses which have the potential for creating problems for adjacent properties to ensure those problems do not occur. Before a Conditional Use Permit is granted, the following findings must be made: Environmental Where Issue Issue Identified Mitigation Measures Adopted (i) That the requested Condi- tional Use Permit will not adversely affect the pur- pose and intent of this Chapter or the City's General Plan or the public convenience or genera' — welfare of persons re: l- ing or working in the neighborhood thereof; (ii) That the requested use will not adversely affect the adjoining land uses and the growth and devel- opment of the area in which it is proposed to be located; (iii) That the size and shape of the site proposed for the use is adequate to allow the full development of the proposed use in a man- ner not detrimental to the particular area; and (iv) That the traffic generatei by the proposed use will not impose an undue burden upon the streets and h ^h- ways in the area. The Specific Plan also pro- vides that the interpretation of the permitted uses as described in the Plan shall be governed by section 9156 of the Downey Municipal Code except that said determina- tions/shall be made at a pub - licly'noticed hearing of the Planning Commission. The Plan also includes a requirement that the Planning Commission and Design Review Board sha . approve a master site plan Parcel A prior to issuance any building permits. These controls will prevent the introduction of noncompatible uses. Environmental Issue Identified Mitigation Measures Adopted 4. Hydrology "Development of the site will result in a sub- stantial portion being covered by -- buildings or paving, which will decrease rainwater perco- lation and increase runoff 5. Energy/ Utilities Concern expressed over adequacy of existing water delivery system to site; a • request was made for this to be addressed in the Specific Plan 6. " raised as to pow regulate noise from daily activities of uses within business park Where Issue 4.Initial Study 5. Council, Community 6. Staff, Community, Planning Commission 4. Initial study specifies that proper design can direct the runoff into facilities with adequate capacity. This con- clusion was incorporated into the Specific Plan as a condi- tion of development as follows: A storm drain shall be instal- led adequate to serve ultimate development of the site and shall be connected with the - existing Los Angeles County Flood Control District system at Old River School Road. 5. A condition of development 1, the Specific Plan which addresses this issue is as follows: Sufficient water flow for fire protection shall be acquired from the City of Downey Water Division and /or the Metropolitan Water District. 6. The following conditions of development included in the Specific Plan avoid this problem: (i) All development on Parcel A shall be subject to all applicable sections of the Code of Ordinances of the City of Downey pertaining to noise regulations (See Sec- tion 4600 -4606 of the Downey Municipal Code). (ii) A noise attenuation bar- rier shall be placed to the east of Rives Avenue. This barrier may consist of a wall, berming, and landscaping, and shall oe prepared by a licensed acoustical engineer. Further. landsrani nr, Environmental Where Issue Issue Identified Mitigation Measures Adopted Planters, fences or walls with the stipulation that said improvements cannot exceed 3 -1/2 feet in height. Paving associated with - street improvements (curbs, etc.) Driveway access points. 4. Parking: Parking requirements shall conform to Section 9150 of the Downey Municipal Code (parking ordinance) with the exception of the fol- lowing: a. Parking adjacent to the streetside landscaped areas shall be designed to prevent car overhangs. b. A minimum of 5% of the paved parking area shall be landscaped. c. A minimum of one tree r-`r 16 spaces shall be required in the parkinc area. The required trees shall be a 'canopy' type to provide a shaded park- ing area. Trees shall be planted at a reasonable size to insure survival, staked, and of a species compatible with the Southern California climate. 5. Signs: Signage shall be in accordance with Sec- tion 9148 of the Downey Municipal Code. A sign program shall be submitted Environmental Where Issue Issue Identified Mitigation Measures Adopted and approved by the Desigr. Review Board in accordance with Section 9148.14(e) pertaining to multi- tenant complexes. 6. Noise Attenuation: A noise attenuation bar- rier shall be placed to the east of Rives Avenue. This barrier may consist of a wall, berming, and landscaping, and shall be prepared by a licensed acoustical engineer. Further, landscaping materials should be used which will reah a height of.20 to 30 feet at maturity to provide visual screening. 7. All development within Parcel A shall be subject to all applicable sectic of the Code of Ordinance. . of the City of Downey per- taining to noise regula- tions. (See Sec- tion 4600 -4606 of the Downey Municipal Code). 8.a. Transformers and emergency generators shall be screened. b. Where possible, trash and transformer enclosures shall be integrated into the same enclosure. c. Transformers may be screened from view by using landscape screening devices, such as 5 ga11c shrubs at 3 feet on cent (minimum). environmental Where Issue Issue Identified Mitigation Measures Adopted d. Trash enclosures are not permitted within the streetside setback. 9. Lighting - See Sec- tion 9152 of the Downey Municipal Code. 10. Walls - See Section 91 of the Downey Municipa_ Code. 11. Security Fences: Security fences shall be constructed of wrought iron. Pilasters along property lines are pro- hibited. The use of addi- tional shrub masses along fences is encouraged. Chain link fencing is prohibited. 12. Service and Delivery Are a. Loading docks and servic(. delivery areas are required to be screened, recessed, and /or enclosed so as not to be directl^ visible from streets at the boundary of the sit b. Trash enclosures shall be screened with a structure and constructed of the same materials and finishes as the adjacent building. c. The use of additional landscape materials to screen the trash enclosure walls is encouraged. d No materials, supplies or equipment, including company owned or operate trucks, shall be stored . any area on a site except Where Issue environmental Issue Identified Mitigation Measures Adopted inside a closed building or behind a visual barrie. e. Loading, service and delivery areas shall not encroach into any setback areas. 13. Site Landscaping and Maintenance: a. A landscape plan shall be required which incor- porates a compatible planting palette and materials to insure land- scaping consistency. b. A minimum of 10% site landscaping is required. c. Along site boundaries, a minimum tree size of 15 gallons shall be utilized for tree plantinc purposes and where pos- sible, 24 inch box trees shall be planted within the building setback areas d. Where possible, existing mature trees shall be incorporated :nto the site design or relocated on site. e. Maintenance of on -site and boundary landscaping sha be the responsibility of the developer. Landscap- ing shall be adequately trimmed, watered, and otherwise maintained to insure a pleasing appear- ance of the site. A landscaping maintenance plan shall be submitted as part of the landscape and irrigation plan. environmental Where Issue Issue Identified 9. Patient Safety 9. Community Commission Council 10. School Pedes- trian Safety at We 4t Middle School on Old River' School Road Located North of Imperial Hwy: Increased use of old River School Road will jeopar- dize pupil safety 10. Community Mitigation Measures Adopted 14. Irrigation: a. An adequate irrigation system shall be installed as part of the required site landscaping. b. All irrigation systems shall be fully automat c. Low - volume irrigation equipment is encouraged for all planted areas within the individual sites and shall be com- pletely automatic. d. No overthrowing of irriga- tion water onto walks, roadways or common area will be allowed. e. Utility cabinets and irri- gation hardware shall be screened by evergree shrubs. 9. The following provision is included in the Specific Until such time that public use of Erickson Avenue is --- allowed, the portion adjunu to Parcel A, signing and striping shall be installea to restrict its use to medical center patients and the court- house bus. 10. City staff has addressed this issue in its present schedule of public improvements which includes installation of flashing yellow lights at th Old River School Road crosswalk.