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Parcel Map 11984 Parcel 1 WQMP
Project Specific Water Quality Management Plan A Template for preparing Project Specific WQMPs for Priority Development Projects located within the Santa Margarita Region of Riverside County Project Title: Mexico Cafe Development No:PM 11984, Parcel 1 Design Review/Case No: PA14-0155/LD17-2831 i Contact Information: Preliminary Prepared for:Sharon Gaitan Final JAG Investments, LLC 43710 Piasano Place Original Date Prepared:September 14,2015 Temecula,CA 92592 Revision Date(s): December 18,2015 951)326-4702 August 7, 7201 February 2 Prepared by:Joe Castaneda,P.E. JLC Engineering and Consulting, Inc. Prepared for Compliance with 41660 Ivy Street,Suite A Regional Board Order No. 119-2010-0016 Murrieta,CA 92562 951)304-9552 Water Quality Management Plan(WQMP) Mexico Cafe A Brief Introduction The Municipal Separate Stormwater Sewer System (MS4) Permit'for the Santa Margarita Region (SMR) requires preparation of a Project-Specific Water Quality Management Plan (WQMP)for all Development Projects as defined in section F.1.d.(1) of the Permit. This Project-Specific WQMP Template for Development Projects in the Santa Margarita Region has been prepared to help document compliance and prepare a WQMP submittal. Below is a flowchart for the layout of this Template that will provide the steps required to document compliance. Section A Section B Section C Project and Site Information Optimize Site Utilization Delineate Drainage Identification of LID and Management Areas(DMAs) Hydromodification requirements,if any Section F r Section E Section D Alternative Compliance(LID Technical Feasibility Technical Feasibility Waiver Program& implement Implement LID BMPs Hydromodification) Hydromodification BMPs Section G Section H Source Control BMPs Operation,Maintenance, and Funding Order No.139-2010-0016,NPDES No.CAS0108766,Waste Discharge Requirements for Discharges from the MS4 Draining the County of Riverside,the Incorporated Cities of Riverside County,and the Riverside County Flood Control and Water Conservation District within the San Diego Region,California Regional Water Quality Control Board, November 10,2010. 2- Water Quality Management Plan(WQMP) Mexico Cafe OWNER'S CERTIFICATION This Project-Specific WQMP has been prepared for JAG Investments, LLC by JLC Engineering and Consulting, Inc.for the Mexico Cafe project. This WQMP is intended to comply with the requirements of the City of Temecula,which includes the requirement for the preparation and implementation of a Project-Specific WQMP. The undersigned,while owning the property/project described in the preceding paragraph,shall be responsible for the implementation and funding of this WQMP and will ensure that this WQMP is amended as appropriate to reflect up-to-date conditions on the site. In addition, the property owner accepts responsibility for interim operation and maintenance of Stormwater Best Management Practices until such time as this responsibility is formally transferred to a subsequent owner. This WQMP will be reviewed with the facility operator, facility supervisors, employees, tenants, maintenance and service contractors, or any other party (or parties) having responsibility for implementing portions of this WQMP. At least one copy of this WQMP will be maintained at the project site or project office in perpetuity.The undersigned is authorized to certify and to approve implementation of this WQMP. The undersigned is aware that implementation of this WQMP is enforceable under the City of Temecula Water Quality Ordinance(Municipal Code Section 8.28.500). I, the undersigned, certify under penalty of law that the provisions of this WQMP have been reviewed and accepted and that the WQMP will be transferred to future successors in interest." Owner's Signature Date Owner's Printed Name Owner's Title/Position PREPARER'S CERTIFICATION The selection,sizing and design of stormwater treatment and other stormwater quality and quantity control Best Management Practices in this plan meet the requirements of Regional Water Quality Control Board Order No. R9- 2010-0016 and any subsequent amendments thereto." September 14, 2015 Preparer's Signature Date Joseph L.Castaneda P.E./Project Manager Preparer's Printed Name Preparer's Title/Position Preparer's Licensure: 3- Water Quality Management Plan(WQMP) Mexico Cafe Table of Contents Section A: Project and Site Information........................................................................................................ 6 A.1 Maps and Site Plans............................................................................................................................ 6 A.2 Identify Receiving Waters...................................................................................................................7 A.3 Drainage System Susceptibility to Hydromodification.......................................................................7 A.4 Additional Permits/Approvals required for the Project: ....................................... ............................8 Section B:Optimize Site Utilization (LID Principles) .....................................................................................9 Section C: Delineate Drainage Management Areas (DMAs).......................................................................10 SectionD: Implement LID BMPs.................................................................................................................14 D.1 Infiltration Applicability....................................................................................................................14 D.2 Harvest and Use Assessment............................................. .......................................-.....................16 D.3 Bioretention and Biotreatment Assessment................................................... ............................18 D.4 Other Limiting Geotechnical Conditions................................. ......—................................................19 D.5 Feasibility Assessment Summaries...................................................................................................19 D.6 LID BMP Sizing..................................................................................................................................20 Section E: Implement Hydrologic Control BMPs and Sediment Supply BMPs...........................................21 E.1 Onsite Feasibility of Hydrologic Control BMPs..................................................................................21 E.2 Meeting the HMP Performance Standard for Small Project Sites....................................................22 E.3 Hydrologic Control BMP Selection....................................................................................................23 E.4 Hydrologic Control BMP Sizing..........................................................................................................23 E.5 Implement Sediment Supply BMPs.................................................................................................,.24 Section F:Alternative Compliance..............................................................................................................28 F.1 Identify Pollutants of Concern...........................................................................................................30 F.2 Stormwater Credits...........................................................................................................................31 F.3 Sizing Criteria.............................................. ......................................................................................31 F.4 Treatment Control BMP Selection........................................................................................,...........32 F.5 Hydrologic Performance Standard—Alternative Compliance Approach..........................................32 F.6 Sediment Supply Performance Standard-Alternative Compliance.................................................33 SectionG:Source Control BMPs.................................................................................................................34 SectionH: Construction Plan Checklist.......................................................................................................37 Section I:Operation, Maintenance and Funding........................................................................................38 Acronyms,Abbreviations and Definitions..................................................................................................39 4- Water Quality Management Plan(WQMP) Mexico Cafe List of Tables Table A.1 Identification of Receiving Waters................................................................................................7 Table A.2 Identification of Susceptibility to Hydromodification...................................................................8 TableA.3 Other Applicable Permits..............................................................................................................8 TableC.1 DMA Classifications................................................................................................ ................. 10 Table C.2 Type'A',Self-Treating Areas....................................................................................................... 10 TableC.3 Type'B',Self-Retaining Areas .....................................................................................................11 Table C.4 Type'C',Areas that Drain to Self-Retaining Areas......................................................................11 Table C.5 Type'D',Areas Draining to BMPs ...............................................................................................12 Table D.1 Infiltration Feasibility...............................................................................,...................,.....,........14 Table D.2 Geotechnical Concerns for Onsite Retention Table ...................................................................19 Table D.3 LID Prioritization Summary Matrix.............................................................................................19 Table D.4 DCV Calculations for LID BMPs...................................................................................................20 TableD.5 LID BMP Sizing.............................................................................................................................21 Table E.1 LID&Hydromodification BMP Location.............................................................,........................23 Table E.2 Hydrologic Control BMP Sizing....................................................................................................24 Table F.1 Potential Pollutants by Land Use Type........................................................................................30 TableF.2 Stormwater Credits.....................................................................................................................31 Table F.3 Treatment Control BMP Sizing....................................................................................................31 Table F.4 Treatment Control BMP Selection.-.......................... ........................ .........................................32 Table F.5 Offsite Hydrologic Control BMP Sizing...................................................—..........,.......................33 Table G.1 Structural and Operational Source Control BMP.........................................................................35 Table H.1 Construction Plan Cross-reference.............................................................................................37 List of Appendices Appendix 1: Maps and Site Plans Appendix 2: Construction Plans Appendix 3: Soils Information Appendix 4: Historical Site Conditions Appendix 5: LID Infeasibility Appendix 6: BMP Design Details Appendix 7: Hydromodificaion Appendix 8: Source Control Appendix 9: O&M Appendix 10: Education Materials 5 , Water Quality Management Plan CWQMP] Mexico Cafe Section A: Project and Site Information PROJECT INFORMATION Type of Project: Restaurant Planning Area: N/A Community Name: City of Temecula Development Name: Mexico Cafe PROJECT LOCATION Latitude&Longitude(DMS):33°28'22"N,117°07'29"W Project Watershed and Sub-Watershed:Santa Margarita Watershed,Temecula Creek Sub-Watershed APN(s):961-440-015 Map Book and Page No.:Book 67 page 87 PROJECT CHARACTERISTICS Proposed or potential land use(s) Restaurant Proposed or Potential SIC Codes) 5812 Area of Impervious Project Footprint(SF) 96,703 Total area of proposed Impervious Surfaces within the Project Limits(SF)/or Replacement 96,703 Total Project Area(ac)2.61 gross;2.37 net Does the project consist of offsite road improvements? F]Y ® N Does the project propose to construct unpaved roads? Y ® N Is the project part of a larger common plan of development(phased project)? Y ® N Is the project exempt from HMP Performance Standards? Z Y N EXISTING SITE CHARACTERISTICS Total area of existing Impervious Surfaces within the project limits(SF) 0 Is the project located within any Multi-Species Habitat Conservation Plan (MSHCP Criteria ®Y ®N Cell? If so,identify the Cell number: 7445 Are there any natural hydrologic features on the project site? Y ® N Is a Geotechnical Report attached? Y N If no Geotech. Report, list the Natural Resources Conservation Service (NRCS) soils type(s) Soil Types A and D present on the site(A, B,C and/or D) What is the Water Quality Design Storm Depth for the project? 0.95 A.1 Maps and Site Plans When completing your Project-Specific WQMP, include a map of the Project vicinity and existing site. In addition, include all grading, drainage, landscape/plant palette and other pertinent construction plans in Appendix 2.At a minimum,your WQMP Site Plan should include the following: Drainage Management Areas(DMAs) Source Control BMPs Proposed Structural Best Management • Buildings, Roof Lines, Downspouts Practices (BMPs) Impervious Surfaces Drainage Path Standard Labeling Drainage infrastructure,inlets,overflows 6- Water Quality Management Plan(WQMP) Mexico Cafe Use your discretion on whether or not you may need to create multiple sheets or can appropriately accommodate these features on one or two sheets. Keep in mind that the Copermittee plan reviewer must be able to easily analyze your Project utilizing this template and its associated site plans and maps. A.2 Identify Receiving Waters Using Table A.1 below,list in order of upstream to downstream,the Receiving Waters that the Project site is tributary to. Continue to fill each row with the Receiving Water's 303(d) listed impairments (if any), designated Beneficial Uses,and proximity, if any,to a RARE Beneficial Use. Include a map of the Receiving Waters in Appendix 1.(LIM2::ZitnanM.itaterboards.cu.bxoi :sarirdrWo—Iiiater i.ssrresiprt grru rrsihrrsirt l rrr J Table A.1 Identification of Receiving Waters Receiving Waters USEPA Approved 303(d) List Designated Proximity to RARE Impairments Beneficial Uses Beneficial Use Pesticides (Chlorpyrifos); Metals MUN,AGR,IND,PROC,GWR,REC-2, Not a RARE water body;Temecula Creek Copper); Nutrients (Phosphorus); Total WARM,WILD adjacent to project siteDissolvedSolids;Toxicity Santa Margarita River — Nutrients (Phosphorus), Pesticides MUN, AGR, IND, REC-1, REC-2, RARE WATERBODY Upper portion (HAS 2.22, ( Toxicity)WARM,COLD,WILD,RARE 7.32 MILES2.21) Santa Margarita River — Bacteria & Viruses (Enterococcus, Fecal MUN,AGR,IND, PROC,REC-1,REC- RARE WATERBODY Lower Portion (HSA 2.13, Coliform), Nutrients (Phosphorus, 2,WARM,COLD,WILD,RARE 18.58 MILES2.12,2.11) Nitrogen) REC-1, REC-2, EST, WILD, RARE, RARE WATERBODY Santa Margarita Lagoon Nutrients(Eutrophic) MAR,MIGR,SPWN 23.82 MILES IND, NAV, REC-1, REC-2, COMM, RARE WATERBODY Pacific Ocean None BIOL, WILD, RARE, MAR, AQUA, MIGR,SPWN,SHELL 24.18 MILES A.3 Drainage System Susceptibility to Hydromodification Using Table A.2 below, list in order of the point of discharge at the project site down to the Santa Margarita River, each drainage system or receiving water that the project site is tributary to. Continue to fill each row with the material of the drainage system,the storm drain susceptibility using the SWCT2(Stormwater&Water Conservation Tracking Tool - http://rlvco.permitrark.coml) or Map 2 of the Hydromodification Susceptibility Documentation Report and Mapping:Santa Margarita Region (Appendix D of the SMR HMP), and the condition for exempting the drainage system, if applicable. If the exemption includes receiving waters that were not evaluated in Appendix D, provide supporting documentation in Appendix 7 to demonstrate that they classify as Engineered, Fully Hardened and Maintained (EFHM) channels, consistent with the definition provided in Appendix D. Include a map exhibiting each drainage system and the associated susceptibility in Appendix 1. 7- Water Quality Management Plan CWQMP) Mexico Cafe Table A.2 Identification of Stjsceptibility to Hydromodification Drainage System Drainage System Material Susceptibility of Drainage Hydromodification System Exemption Temecula Creek Earthen Exempt Large River Santa Margarita Earthen Not Susceptible Large River River A.4 Additional Permits/Approvals required for the Project: Table A.3 Other Applicable Permits Agency Permit Required State Department of Fish and Game, 1602 Streambed Alteration Agreement Y ® N State Water Resources Control Board,Clean Water Act Section 401 Water Quality Certification Y ® N = m US Army Corps of Engineers,Clean Water Act Section 404 Permit Y ® N US Fish and Wildlife, Endangered Species Act Section 7 Biological Opinion Y ® N Statewide Construction General Permit Coverage Y N Statewide Industrial General Permit Coverage Y ® N Western Riverside MSHCP Consistency Approval(e.g.,JPR,DBESP) Y ® N Other(please list in the space below as required)Y ® N If yes is answered to any of the questions above,the Copermittee may require proof of approval/coverage from those agencies as applicable including documentation of any associated requirements that may affect this Project-Specific WQMP. 8- Water Quality Management Plan(WQMP) Mexico Cafe Section B: Optimize Site Utilization (LID Principles) Review of the information collected in Section 'A' will aid in identifying the principal constraints on site design and selection of LID BMPs as well as opportunities to reduce imperviousness and incorporate LID Principles into the site and landscape design. For example,constraints might include impermeable soils, high groundwater, groundwater pollution or contaminated soils, steep slopes, geotechnical instability, high-intensity land use, heavy pedestrian or vehicular traffic, utility locations or safety concerns. Opportunities might include existing natural areas,low areas,oddly configured or otherwise unbuildable parcels, easements and landscape amenities including open space and buffers (which can double as locations for LID Bioretention BMPs), and differences in elevation (which can provide hydraulic head). Prepare a brief narrative for each of the site optimization strategies described below. This narrative will help you as you proceed with your Low Impact Development (LID) design and explain your design decisions to others. The 2010 SMR M54 Permit further requires that LID Retention BMPs(Infiltration Only or Harvest and Use) be used unless it can be shown that those BMPs are infeasible. Therefore, it is important that your narrative identify and justify if there are any constraints that would prevent the use of those categories of LID BMPs. Similarly, you should also note opportunities that exist which will be utilized during project design. Upon completion of identifying Constraints and Opportunities, include these on your WQMP Site plan in Appendix 1. Site Optimization The following questions are based upon Section 3.2 of the WQMP Guidance Document. Review of the WQMP Guidance Document will help you determine how best to optimize your site and subsequently identify opportunities and/or constraints,and document compliance. Did you identify and preserve existing drainage patterns? If so, how? If not,why? The project site currently drains to Temecula Creek and to Pechanga Parkway. The project site will discharge into Temecula Creek via the existing storm drain system within with Pechanga Parkway. Hydraulic analyses were performed as part of the Hydrology Study to validate that the system would function. The project connected to this storm drain at the request of the City of Temecula. Did you identify and protect existing vegetation? If so, how? If not,why? The project site is currently barren with no existing vegetation to preserve. Did you identify and preserve natural infiltration capacity? If so, how? If not,why? Infiltration testing was performed, with mostly suitable rates for infiltration based BMPs. However, due to groundwater limitations,infiltration was not utilized. See discussion in Infiltration Feasibility discussion. Did you identify and minimize impervious area? If so, how? If not,why? The project site uses impervious surfaces for parking area,sidewalk area,and building area. The remaining portion of the project site will be pervious/landscaped area. Did you identify and disperse runoff to adjacent pervious areas?If so, how? If not,why? 9- Water Quality Management Plan(WQMP) Mexico Cafe The roof areas will discharge into adjacent landscaping, where feasible. Additionally,all onsite impervious areas discharge into one of the four onsite landscaped bioretention basins. Section C: Delineate Drainage Management Areas DMAs) Utilizing the procedure in Section 3.3 of the WQMP Guidance Document which discusses the methods of delineating and mapping your project site into individual DMAs, complete Table CA below to appropriately categorize the types of classification (e.g., Type A, Type B, etc.) per DMA for your Project site. Upon completion of this table, this information will then be used to populate and tabulate the corresponding tables for their respective DMA classifications. Table C.1 DMA Classifications DMA Name or Identification Surface Type(s)l Area(Sq.Ft.) DMA Type DMA Al Roof,Asphalt, Concrete, 22,216 Type "D" Landscaping DMA B1 Roof,Asphalt, Concrete, 21,780 Type "D" Landscaping DMA C1 Asphalt, Concrete, 13,068 Type "D" Landscape DMA D1 Roof,Asphalt, Concrete, 35,719 Type"D" Landscaping DMA El Landscaping 2,614 Type "A" Reference Table 2-1 in the WQMP Guidance Document to populate this column Table C.2 Type: 'A',Self-Treating Areas DMA Name or Area(Sq.Ft.) Stabilization Type Irrigation Type(if any) Identification DMA E1 2,614 Landscaping Drip or other low-water use irrigation 10- Water Quality Management Plan(WQMP) Mexico Cafe Table C.3 I vp. 'F3' Sell'-Re!.a if)i_ Ar e-as Self-Retaining Area Type'C' DMAs that are draining to the Self-Retaining Area Area Storm square Depth C]from Table Required Retention Depth DMA Post-project _ feet) (inches) C.4= inches) Name/ID surface type A) B] DMA Name/ID C) D] 7 D] = [B] + [ B] [C] A] Table C.4TVpe'C'.Areas that Drain to Self-Retaining Areas DMA Receiving Self-Retaining DMA o a 0 o E a C fO a n 4°Area(squarez a Cr 0 Product feet) Ratio 0 A) B] [C]_[A]x[B] D] C]/[D]DMA name/ID f i Note:(See Section 3.3 of WQMP Guidance Document)Ensure that partially pervious areas draining to a Self-Retaining area do not exceed the following ratio: Z 1 Imperuious Fractio. Tributary Area:Self-Retaining Area) 11- Water Quality Management Plan(WQMP) Mexico Cafe Table C.5 fypr j V,Areas D-aining to BMPs DMA Name or ID BMP Name or ID DMA Al Bioretention Basin 1 DMA B1 Bioretention Basin 2 DMA C1 Bioretention Basin 3 DMA D1 Bioretention Basin 4 Note:More than one DMA may drain to a single LID BMP,•however, one DMA may not drain to more than one BMP. The project site will implement Bioretention Basins to treat the required water quality volume generated by the project site. A total of four Bioretention Basins are proposed throughout the project site. Additionally, the project site incorporates self-treating landscaped areas and a self-retaining areas. It should be noted that a total of 0.03 acres of driveway area at both entrances to the project site are not treated due to the slope of the entrance driveways towards Pechanga Parkway. This is due to the requirement of the project site and pad elevation to be elevated above the highest adjacent Base Flood Elevation (BFE) of 1011.0 (see discussion in the Hydrology and Hydraulics Report for Mexico Cafe). However,this 0.03 acre area is considered negligible. The required water quality volume (VBMP) for each area was determined using the Santa Margarita Watershed BMP Design Volume, VBMP spreadsheet. The effective impervious fraction used was 0.91, which is consistent with commercial development. The Bioretention Basins were sized using a modified Bioretention Facility—Design Procedure spreadsheet, which was created for irregular shaped facilities. The Bioretention Facility spreadsheets included in the LID manual are for rectangular shaped facilities. The proposed Bioretention Basins as part of this project are irregular shaped,therefore these spreadsheets cannot be utilized. For irregular shaped Bioretention Planters,the spreadsheets were modified so that the bottom surface area of the bioretention basin could be manually entered, and an effective depth is calculated based upon the bottom surface area, depth of soil media, and volume above the soil media. The effective storage volume is the sum of the volume stored within the soil media and the volume stored above the soil media. The effective depth is then calculated by dividing the effective storage volume by the proposed bottom surface area. The minimum required surface area is then calculated by dividing the required BMP Design Volume (VBMP) by the effective depth. The following table summarizes the Bioretention Planter sizing: Bioretention Planter Summary Table 12- Water Quality Management Plan(WQMP) Mexico Cafe Minimum Proposed Bottom Bottom Tributary VBMP Surface Area Surface Area DMA Area BMP ID Area (AC) (cu.ft.) sq. ft.) sq. ft.) Al WQ Basin#1 0.51 1,314 876 938 B1 WQ Basin#2 0.50 1,289 860 1,684 C1 WQ Basin#3 0.30 773 516 799 D1 WQ Basin#4 0.82 2,062 1,375 1,692 Based upon the Bioretention Basin surface areas and spreadsheets,the planters have sufficient area and volume to treat the required water quality volume generated by the project site. DMA Area E1 is considered self-treating areas. DMA E1 are landscaped areas and do not incorporate impervious surfaces. The 2014 Water Quality Management Plan for the Santa Margarita Region of Riverside County states: In general, Self-Treating Areas include no impervious areas, unless the impervious area is very small (e.g. 5% or less of the Self-Treating Area) and slopes are gentle enough to ensure Runoff from impervious areas will be absorbed into the vegetation and soil." Drainage Management Area E1 falls within this definition of self-Treating Area. DMA F1 is a total of 0.03 acres of driveway area. This area drains away from the project site due to the requirement that the building pad be elevated above the highest adjacent Base Flood Elevation (BFE). However,this 0.03 acre area is considered negligible. 13- Water Quality Management Plan(WQMP) Mexico Cafe Section D: Implement LID BMPs D.1 Infiltration Applicability An assessment of the feasibility of utilizing Infiltration BMPs is required for all projects, except in the following case: Harvest and Use BMPs will be implemented to address the Design Capture Volume (see the Harvest and Use Assessment below) for all Drainage Management Areas AND the project is exempt from HMP Performance Standards (Proceed to Section D.2 and Section E). If the above box remains unchecked, perform a site-specific evaluation of the feasibility of Infiltration BMPs using each of the applicable criteria identified in Chapter 3.4.1 of the WQMP Guidance Document and complete the remainder of Section D.1. Is there an infiltration concern (see discussion in Chapter 2.3.4 of the WQMP Guidance Document for further details)? Y N If yes has been checked, both Infiltration BMPs and Hydrologic Control BMPs that include an infiltration functionalities may not be feasible for the site. It is recommended that you contact your Copermittee to verify whether or not infiltration within the Project is infeasible. Geotechnical Report A Geotechnical Report or Phase I Environmental Site Assessment may be required by the Copermittee to confirm present and past site characteristics that may affect the use of Infiltration BMPs. In addition,the Copermittee, at their discretion, may not require a geotechnical report for small projects as described in Chapter 2 of the WQMP Guidance Document. If a geotechnical report has been prepared, include it in Appendix 3. In addition, if a Phase I Environmental Site Assessment has been prepared, include it in Appendix 4. Is this project classified as a small project consistent with the requirements of Chapter 2 of the WQMP Guidance Document? Y ® N Infiltration Feasibility Table D.1 below is meant to provide a simple means of assessing which DMAs on your site support Infiltration BMPs and is discussed in the WQMP Guidance Document in Chapter 2.3.4. Check the appropriate box for each question and then list affected DMAs as applicable.If additional space is needed, add a row below the corresponding answer. Infiltration I-eass,,,. Does the project site...YES NO have any DMAs with a seasonal high groundwater mark shallower than 10 feet? X If Yes,list affected DMAs:DMAs Al,61,C1,and D1 have any DMAs located within 100 feet of a water supply well? X If Yes,list affected DMAs: have any areas identified by the geotechnical report as posing a public safety risk where infiltration of stormwater X could have a negative impact? If Yes,list affected DMAs: have measured in-situ infiltration rates of less than 1.6 inches/hour? X If Yes,list affected DMAs:DMA DI 14- Water Quality Management Plan(WQMP) Mexico Cafe have significant cut and/or fill conditions that would preclude in-situ testing of infiltration rates at the final X infiltration surface? If Yes,list affected DMAs:All DMA's,project site is currently graded with significant development. have any contaminated groundwater plume in the vicinity of the site? X If Yes,list affected DMAs: geotechnical report identifies other site-specific factors that would preclude effective and safe infiltration?X Describe here: If you answered "Yes" to any of the questions above for any DMA, Infiltration BMPs should not be used for those DMAs and you should proceed to the assessment for Harvest and Use below. Infiltration Testing has been performed for the project site. The results of the infiltration testing included in Appendix 3) are summarized below: BMP Test#1 Test#2 Average WQ Basin 1 P-1=1.30 in/hr P-2=3.20 in/hr 2.25 in/hr WQ Basin 2 P-3=9.20 in/hr P-4=4.30 in/hr 6.75 in/hr WQ Basin 3 P-5=6.80 in/hr P-6=2.90 in/hr 4.85 in/hr WQ Basin 4 P-7=1.10 in/hr P-8=0.30 in/hr 0.70 in/hr Based upon the tests,only WQ Basin 4 has rates that are not suitable for infiltration based BMPs. However,after inspecting the geotechnical report regarding groundwater, page 4 states: The CW Soils exploration indicated groundwater levels at approximately 20 feet below the existing grade. Our exploration encountered saturated soils at a depth of approximately 16 feet, assumed to be capillary fringe of the groundwater table. Historically higher levels can be anticipated based on seasonal precipitation." Based upon this information,the highest possible groundwater elevation for the site would be elevation 990,with high probability of having a high water level of 994. The lowest infiltrating surface area for the basins (utilizing an infiltration trench design due to the size and area constraints imposed by the project site)would have an elevation of approximately 1001.5. The minimum distance between the infiltration surface and the groundwater level would be 7.5 feet. Per the 2014 Water Quality Management Plan for the Santa Margarita Region of Riverside County,Section 2.3.4.b Groundwater Protection,the seasonal high groundwater mark must be at least 10 feet below the invert of the LID Infiltration BMP. Since the probability of the high groundwater level being less than 10 feet below the invert of the infiltrating surface of the trenches is significantly high,infiltration BMPs were not utilized. The geotechnical report has been included in Appendix 3 following the infiltration testing. 15- Water Quality Management Plan(WQMP) Mexico Cafe D.2 Harvest and Use Assessment Please check what applies: x Reclaimed water will be used for the non-potable water demands for the Project. El Downstream water rights may be impacted by Harvest and Use as approved by the Regional Board (verify with the Copermittee). The Design Capture Volume(DCV)will be addressed using Infiltration Only BMPs.In such a case, Harvest and Use BMPs are still encouraged, but it would not be required if the DCV will be infiltrated or evapotranspired. If any of the above boxes have been checked, Harvest and Use BMPs need not be assessed for the site. If neither of the above criteria applies,follow the steps below to assess the feasibility of irrigation use,toilet use and other non-potable uses(e.g., industrial use). Irrigation Use Feasibility Complete the following steps to determine the feasibility of harvesting stormwater runoff for Irrigation Use BMPs on your site: Step 1: Identify the total area of irrigated landscape on the site,and the type of landscaping used. Total Area of Irrigated Landscape: N/A Type of Landscaping(Conservation Design or Active Turf): N/A Step 2: Identify the planned total of all impervious areas on the proposed project from which runoff might be feasibly captured and stored for irrigation use. Depending on the configuration of buildings and other impervious areas on the site,you may consider the site as a whole,or parts of the site, to evaluate reasonable scenarios for capturing and storing runoff and directing the stored runoff to the potential use(s) identified in Step 1 above. Total Area of Impervious Surfaces:N/A Step 3: Cross reference the Design Storm depth for the project site (see Exhibit A of the WQMP Guidance Document)with the left column of Table 2-4 in Chapter 2 to determine the minimum area of Effective Irrigated Area per Tributary Impervious Area (EIATIA). Enter your EIATIA factor: N/A Step 4: Multiply the unit value obtained from Step 3 by the total of impervious areas from Step 2 to develop the minimum irrigated area that would be required. Minimum required irrigated area: N/A Step 5: Determine if harvesting stormwater runoff for irrigation use is feasible for the project by comparing the total area of irrigated landscape(Step 1)to the minimum required irrigated area Step 4). Minimum required irrigated area(Step 4)Available Irrigated Landscape(Step 1) N/A N/A 16- Water Quality Management Plan CWQMP) Mexico Cafe Toilet Use Feasibility Complete the following steps to determine the feasibility of harvesting stormwater runoff for toilet flushing uses on your site: Step 1: Identify the projected total number of daily toilet users during the wet season, and account for any periodic shut downs or other lapses in occupancy: Projected Number of Daily Toilet Users: N/A Project Type: N/A Step 2: Identify the planned total of all impervious areas on the proposed Project from which runoff might be feasibly captured and stored for toilet use. Depending on the configuration of buildings and other impervious areas on the site,you may consider the Project site as a whole, or parts of the site, to evaluate reasonable scenarios for capturing and storing runoff and directing the stored runoff to the potential use(s) identified in Step 1 above. Total Area of Impervious N/A Step 3: Enter the Design Storm depth for the project site(see Exhibit A)into the left column of Table 2- 3 in Chapter 2 to determine the minimum number or toilet users per tributary impervious acre TUTIA). Enter your TUTIA factor: N/A Step 4: Multiply the unit value obtained from Step 3 by the total of impervious areas from Step 2 to develop the minimum number of toilet users that would be required. Minimum number of toilet users: N/A Step 5: Determine if harvesting stormwater runoff for toilet flushing use is feasible for the Project by comparing the Number of Daily Toilet Users(Step 1)to the minimum required number of toilet users(Step 4). Minimum required Toilet Users(Step 4) G Projected number of toilet users(Step 1) N/A N/A Other Non-Potable Use Feasibility Are there other non-potable uses for stormwater runoff on the site(e.g. industrial use)?See Chapter 2 of the Guidance for further information. If yes, describe below. If no,write N/A. N/A Step 1: Identify the projected average daily non-potable demand, in gallons per day, during the Wet Season and accounting for any periodic shut downs or other lapses in occupancy or operation. Average Daily Demand:N/A Step 2: Identify the planned total of all impervious areas on the proposed Project from which runoff might be feasibly captured and stored for the identified non-potable use. Depending on the configuration of buildings and other impervious areas on the site,you may consider the Project 17- Water Quality Management Plan(WQMP) Mexico Cafe site as a whole, or parts of the site,to evaluate reasonable scenarios for capturing and storing runoff and directing the stored runoff to the potential use(s) identified in Step 1 above. Total Area of Impervious Surfaces:N/A Step 3: Enter the Design Storm Depth for the Project site(see Exhibit A)into the left column of Table 2- 5 in Chapter 2 to determine the minimum demand for non-potable uses of stormwater runoff per tributary impervious acre. Enter the factor from Table 2-3:N/A Step 4: Multiply the unit value obtained from Step 4 by the total of impervious areas from Step 3 to develop the minimum gpd of non-potable use that would be required. Minimum required use:N/A Step 5: Determine if harvesting stormwater runoff for other non-potable use is feasible for the Project by comparing the Number of Daily Toilet Users (Step 1) to the minimum required number of toilet users(Step 4). Minimum required non-potable use(Step 4) Projected average daily use(Step 1) N/A N/A If Irrigation,Toilet and Other Use feasibility anticipated demands are less than the applicable minimum values, Harvest and Use BMPs are not required and you should proceed to utilize LID Bioretention and Biotreatment BMPs, unless a site-specific analysis has been completed that demonstrates technical infeasibility as noted in D.3 below. D.3 Bioretention and Biotreatment Assessment Other LID Bioretention and Biotreatment BMPs as described in Chapter 2.3 of the WQMP Guidance Document are feasible on nearly all development sites with sufficient advance planning. Select one of the following: LID Bioretention/Biotreatment BMPs will be used for some or all DMAs of the Project as noted below in Section D.4 A site-specific analysis demonstrating the technical infeasibility of all LID BMPs has been performed and is included in Appendix 5. If you plan to submit an analysis demonstrating the technical infeasibility of LID BMPs, request a pre-submittal meeting with the Copermittee with jurisdiction over the Project site to discuss this option. Proceed to Section E to document your alternative compliance measures. 18- Water Quality Management Plan(WQMP) Mexico Cafe D.4 Other Limiting Geotechnical Conditions Onsite retention may not be feasible due to specific geotechnical concerns identified in the Geotechnical Report. If any, describe below. If no,write N/A: N/A Table D.2 GeotE,chnical Concerns for Onsite Retention Table Type of Geotechnical Concern DMAs Feasible(By Name or ID) DMAs Infeasible(By Name or ID) Collapsible Soil Expansive Soil Slopes Liquefaction Other D.5 Feasibility Assessment Summaries From the Infiltration,Harvest and Use,Bioretention and Biotreatment Sections above,complete Table D.3 below to summarize which LID BMPs are technically feasible, and which are not, based upon the established hierarchy. Table D.3 LID Prioritization S nary Matrix LID BMP Hierarchy No LID DMA Alternative Name/ID 1. Infiltration 2. Harvest and use 3. Bioretention 4. Biotreatment Compliance) DMA Al E DMA 131 N DMA C1 El N El DMA D1 El 1 El El 1:1 For those DMAs where LID BMPs are not feasible, provide a brief narrative below summarizing why they are not feasible, include your technical infeasibility criteria in Appendix 5,and proceed to Section E below to document Alternative Compliance measures for those DMAs. Recall that each proposed DMA must pass through the LID BMP hierarchy before alternative compliance measures may be considered. N/A 19- Water Quality Management Plan CWQMP) Mexico Cafe D.6 LID BMP Sizing Each LID BMP must be designed to ensure that the DCV will be addressed by the selected BMPs. First, calculate the DCV for each LID BMP using the VBMP worksheet in Appendix F of the LID BMP Design Handbook. Second, design the LID BMP to meet the required VBMP using a method approved by the Copermittee with jurisdiction over the Project site. Utilize the worksheets found in the LID BMP Design Handbook or consult with the Copermittee to assist you in correctly sizing your LID BMPs.Complete Table D.4 below to document the DCV and the Proposed Volume for each LID BMP. Provide the completed design procedure sheets for each LID BMP in Appendix 6.You may add additional rows to the table below as needed. NOTE. Due to there being 4 separate DMA areas in which DCV Calculations were performed, these spreadsheets have been included in Appendix 6. Table D.4 DCV Calculations for LID BMPs Post- DMA DMA Project Effective DMA Areas x DMA square Surface Impervious Runoff Runoff Type/ID feet) Type Fraction,If Factor Factor Enter BMP Name/Identifier Here A]B]1 [C] A]x[C] Proposed Design Volume Storm on Plans Depth DCV,VBMP (cubic in) cubicfeet) feet) B],[C]is obtained as described in Section 2.5 of the WQMP Guidance Document E]is obtained from Exhibit A in the WQMP Guidance Document F]is equal to([D]X[E])/12 G]is obtained from a design procedure sheet,such as in LID BMP Design Handbook and placed in Appendix 6 20- Water Quality Management Plan(WQMP) Mexico Cafe Each LID BMP must be designed to ensure that the Design Capture Volume (DCV)will be addressed by the selected BMPs. First,calculate the Design Capture Volume for each LID BMP using the 'VBMP worksheet in Appendix F of the LID BMP Design Handbook.Second,design the LID BMP to meet the required VBMP using a method approved by the Copermittee. Utilize the worksheets found in the LID BMP Design Handbook or consult with your Copermittee. Complete Table D.5 below to document the Design Capture Volume and the Proposed Volume for each LID BMP.You can add rows to the table as needed.Alternatively,the Santa Margarita Hydrology Model (SMRHM) can be used to size LID BMPs to address the DCV and, if applicable,to size Hydrologic Control BMPs to meet the Hydrologic Performance Standard of the SMR HMP, as identified in Section E. Tabie u.5 LID BMP Si-, BMP Name/ DMA No.BMP Type/Description Design Capture Proposed Volume ID Volume (ft3) ft3) Bioretention DMA Al Bioretention Basin 1,314 1,407 Basin 1 Bioretention DMA B1 Bioretention Basin j 1,289 2,526 Basin 2 Bioretention Basin 3 DMA C1 Bioretention Basin 773 1,198 Bioretention DMA D1 Bioretention Basin 2,062 2,537 Basin 4 Section E: Implement Hydrologic Control BMPs and Sediment Supply BMPs If a completed Table A.2 demonstrates that the project is exempt from HMP Performance Standards, specify N/A and proceed to Section F, if applicable, and Section G. E.1 Onsite Feasibility of Hydrologic Control BMPs An assessment of the feasibility of implementing onsite Hydrologic Control BMPs is required for all projects. Select one of the following:N/A Yes—The implementation of Hydrologic Control BMPs is feasible onsite. (Proceed to Step E.3 and Step E.4) Or - El No—The project site is larger than one acre and the implementation of Hydrologic Control BMPs is not feasible onsite. (Proceed to Step E.5 and Step F forAlternative Compliance upon approval of the Technical Feasibility Assessment by the Copermittee) 21- Water Quality Management Plan(WQMP) Mexico Cafe No—The project site is smaller than one acre and the implementation of Hydrologic Control BMPs is not feasible onsite. (Proceed to Step E.2) If the reasons for infeasibility are different from those listed in Section D.1,describe the technical or spatial reasons that preclude the implementation of onsite Hydrologic Control BMPs. If none,write N/A: N/A Approval of the condition for infeasibility, if any, is required by the Copermittee. Has the condition for infeasibility been approved by the Copermittee? Y N ® N/A E.2 Meeting the HMP Performance Standard for Small Project Sites Select one of the following: Yes—The project site is equal to or larger than one acre. (Proceed to Step E.3,Step E.4, and Step E.5) Or - No—The project site is less than one acre. (Follow the remainder of Step E.2) Only a Simplified Technical Feasibility Study is required from the applicant. Complete the Simplified Technical Feasibility Study in Appendix 7, which must include, at a minimum, the soil conditions at the PDP,a demonstration of the lack of available space for onsite Hydrologic Control BMPs,an explanation of prohibitive costs to implement Hydrologic Control BMPs, and a written opinion from a Registered Geotechnical Engineer identifying the infeasibility due to geotechnical concerns. Select one of the following: Yes—Onsite Hydrologic Control BMPs are feasible. (Proceed to Step E.,Step E.4, and Step E.5) Or - El No — Onsite Hydrologic Control BMPs are not feasible per the Simplified Technical Feasibility Study. (Proceed to Section E.5 for Sediment Supply Performance Standard and Section F for Alternative Compliance) 22- Water Quality Management Plan(WQMP) Mexico Cafe E.3 Hydrologic Control BMP Selection Capture of the DCV and achievement of the Hydrologic Performance Standard may be met by combined and/or separate structural BMPs.Similarly,compliance with the two identified requirements may be fully or partially achieved onsite. For each DMA, identify in Table EA if the DCV is fully or partially captured onsite, if the Hydrologic Performance Standard is fully or partially met onsite (by using the SMRHM identified in Step EA), and if structural BMPs for compliance with the LID requirement and the Hydrologic Performance Standard are combined. DMA LID BMP Hydrologic Control Combined BMP type and ID BMP BMP I Onsite Partially Onsite PartiallyOnsite Yes Offsite Onsite n NoOffsite None None Required Required Onsite El Partially Onsite Onsite Partially Yes Onsite Offsite Offsite No None Required None Required i Onsite Onsite Partially Onsite Partially Onsite Yes Offsite Offsite No None Required None Required i I For each DMA provide a narrative describing if the DCV and the Hydrologic Performance Standard are to be fully managed onsite. If not, the narrative should detail how and where offsite structural BMPs will achieve management of the DCV and the Hydrologic Performance Standard. EA Hydrologic Control BMP Sizing Each Hydrologic Control BMP must be designed to ensure that the flow duration curve of the post- development DMA will not exceed that of the pre-existing, naturally occurring, DMA by more than ten percent over a one-year period. Using SMRHM,the applicant shall demonstrate that the performance of each designed Hydrologic Control BMP complies with the Hydrologic Performance Standard. Complete Table E.2 below and identify, for each DMA, the type of Hydrologic Control BMP, if the SMRHM model 23- Water Quality Management Plan CWQMP) Mexico Cafe confirmed the management (Identified as "passed" in SMRHM), the total volume capacity of the Hydrologic Control BMP,the Hydrologic Control BMP footprint at top floor elevation, and the drawdown time of the Hydrologic Control BMP. SMRHM summary reports should be documented in Appendix 7. Referto the SMRHM Guidance Document for additional information on SMRHM.You can add rows to the table as needed. Table E.2 BMP DMA BMP Type/Description SMRHM BMP Volume I BMP Drawdown Name/ID No. Passed (ac-ft) Footprint(ac) time(hr) N/A El The required DCV volumes have been calculated on spreadsheets included in Appendix 6. The mitigation summaries have been included in Appendix 7. E.5 Implement Sediment Supply BMPs The applicant may refer to Section 2.3 of the SMR HMP for a comprehensive description of the methodology to meet the Sediment Supply Performance Standard. Complete the following steps to determine compliance with the Sediment Supply Performance Standard: NOTE:The project does not have any streams or defined flows lines within the project boundary,and does not have any run-on flows from offsite areas, therefore Sediment Supply is not relevant to the project site,and a Sediment Supply Analysis was not performed. Step 1: Identify if the site is a Significant Source of Bed Sediment Supply to the receiving channel Step 1.A — Is the Bed Sediment of onsite streams similar to that of receiving streams? (SEE DISCUSSION BELOW) Rate the similarity: High Medium Low Results from the geotechnical and sieve analysis to be performed both onsite and in the receiving channel should be documented in Appendix 7.Of particular interest,the results of the sieve analysis,the soil erodibility factor, a description of the topographic relief of the project area, and the lithology of onsite soils should be reported in Appendix 7. Step 1.6—Are onsite streams capable of delivering Bed Sediment Supply from the site, if any,to the receiving channel? (SEE DISCUSSION BELOW) 24- Water Quality Management Plan CWQMP) Mexico Cafe Rate the potential: High Medium Low Results from the analyses of the sediment delivery potential to the receiving channel should be documented in Appendix 7 and identify,at a minimum,the Sediment Source,the distance to the receiving channel,the onsite channel density,the project watershed area,the slope, length, land use, and rainfall intensity. Step 1.0—Will the receiving channel adversely respond to a change in Bed Sediment Load? SEE DISCUSSION BELOW) Rate the need for bed sediment supply: High Medium Low Results from the in-stream analysis to be performed both onsite should be documented in Appendix 7. The analysis should, at a minimum, quantify the bank stability and the degree of incision, provide a gradation of the Bed Sediment within the receiving channel,and identify if the channel is sediment supply- limited. Step 1.D—Summary of Step 1 Summarize in Table E.3 the findings of Step 1 and associate a score(in parenthesis)to each step.The sum of the three individual scores determines if a stream is a significant contributor to the receiving stream. Sum is equal to or greater than eight-Site is a significant source of sediment bed material all on-site streams must be preserved or by-passed within the site plan. The applicant shall proceed to Step 2 for all onsite streams. Sum is greater than five but lower than eight. Site is a source of sediment bed material— some of the on-site streams must be preserved (with identified streams noted). The applicant shall proceed to Step 2 for the identified streams only. Sum is equal to or lower than five.Site is not a significant source of sediment bed material. The applicant may advance to Section F. Table E.3 Triad Assessment Summary Step Rating Total Score 1.A High(3) Medium (2) Low(1) 1.13 High(3) Medium (2) Low(1) 1.0 High(3)Medium (2) Low(1) 25- Water Quality Management Plan(WQMP) Mexico Cafe Significant Source Rating of Bed Sediment to the receiving channel(s) SEE DISCUSSION BELOW) Step 2: Preservation of Identified Onsite Channels Onsite streams identified as a Significant Source of Bed Sediment should be avoided in the site design. Check one of the following: The site design does avoid all onsite channels identified as a Significant Source of Bed Sediment(The applicant may disregard subsequent steps of Section E.5 and directly advance directly to Section F.) Or - The site design does NOT avoid all onsite channels identified as a Significant Source of Bed Sediment The applicant may proceed with the subsequent steps of Section E.5). Provide in Appendix 7 a site map that identifies all onsite channels and highlights those onsite channels that were identified as a Significant Source of Bed Sediment.The site map shall demonstrate, if feasible, that the site design avoids those onsite channels identified as a Significant Source of Bed Sediment. In addition,the applicant shall describe the characteristics of each onsite channel identified as a Significant Source of Bed Sediment. If the design plan cannot avoid the onsite channels, please provide a rationale for each channel individually. Channel#1 traverses the project site from the north easterly boundary to the south westerly boundary. During the preliminary stages of the project, a detailed sediment analysis has not been performed. However, the project site will bypass the existing streams crossing the project site using offsite storm drain infrastructure. During final engineering, a detailed sediment analysis will be performed. Step 3:By-Pass of Upstream Drainage(s)to Preserve the discharge of Bed Sediment Supply to the receiving channel(s) Onsite channels identified as a Significant Source of Bed Sediment Supply should be by-passed the discharge of Bed Sediment Supply to the receiving channel(s). Check one of the following: The site design does avoid and/or bypass all onsite channels identified as a source of Bed Sediment Supply(The applicant may directly advance to Section F.) Or - The site design does NOT avoid or by-pass all onsite channels identified as a source of Bed Sediment Supply(The applicant may proceed to an Alternative Approach, as defined in Section F). Provide in Appendix 7 a site map that identifies all onsite channels and highlights those onsite channels that were identified as a Significant Source of Bed Sediment Supply. The site map shall demonstrate, if feasible,that the site design avoids or by-passes those onsite channels of significant Bed Sediment Supply to the receiving channel(s). In addition, the applicant shall describe the characteristics of each onsite 26- Water Quality Management Plan(WQMP) Mexico Cafe channel identified as a Significant Source of Bed Sediment Supply. If the design plan cannot avoid or by- pass the onsite channels, please provide a rationale for each channel individually. 27- Water Quality Management Plan(WQMP) Mexico Cafe Section P Alternative Compliance LID BMPs and Hydrologic Control BMPs are expected to be feasible on virtually all projects.Where LID BMPs and/or Hydrologic Control BMPs have been demonstrated to be infeasible as documented in Section D and/or Section E, respectively, other Treatment Control BMPs or alternative compliance approaches must be used (subject LID waiver and/or HMP alternative compliance approval by the Copermittee). In addition, if supporting documentation demonstrates the infeasibility to implement Sediment Supply BMPs onsite (See Section E.5),the applicant may refer to Section F.5. Check one of the following boxes: LID Principles, LID BMPs, Hydrologic Control BMPs, and Sediment Suppiy BMPs have been incorporated into the site design to fully address all Drainage Management Areas. No alternative compliance measures are required for this project and thus this Section is not required to be completed. Or - LID Principles and LID BMPs have NOT been incorporated into the site design to fully address the LID requirements for all Drainage Management Areas AND HMP Performance Standards are not fully addressed in the following Drainage Management Areas. o The following Drainage Management Areas are unable to be addressed using LID BMPs. A site specific analysis demonstrating technical infeasibility of LID BMPs has been approved by the Copermittee and included in Appendix 5.The following alternative compliance measures on the following pages are being implemented to ensure that any pollutant loads expected to be discharged by not incorporating LID BMPs, are fully mitigated.The applicant should complete Section F.1,Section F.2,and Section F.3,as applicable. o A site specific analysis demonstrating technical infeasibility of Hydrologic Control BMPs and Sediment Supply BMPs has been approved by the Copermittee and included in Appendix 7. Projects less than one acre have completed the Simplified Technical Feasibility Study.The applicant should complete Section F.5 and/or Section F.6, as applicable. N/A Or - LID Principles and LID BMPs have been incorporated into the site design to fully address the DCV for all Drainage Management Areas. However, HMP Performance Standards are not fully addressed in the following Drainage Management Areas.A site specific analysis demonstrating technical infeasibility of Hydrologic Control BMPs and Sediment Supply BMPs has been approved by the Copermittee and included in Appendix 7. Projects less than one acre have 28- Water Quality Management Plan(WQMP) Mexico Cafe completed the Simplified Technical Feasibility.The applicant should complete Section F.5 and/or Section F.6,as applicable. N/A 29- Water Quality Management Plan(WQMP) Mexico Cafe F.1 Identify Pollutants of Concern Utilizing Table A.1 from Section A above which noted your project's Receiving Waters and their associated USEPA approved 303(d) listed impairments, cross reference this information with that of your selected Priority Development Project Category in Table F.1 below. If the identified General Pollutant Categories are the same as those listed for your Receiving Waters,then these will be your Pollutants of Concern and the appropriate box or boxes will be checked on the last row. The purpose of this is to document compliance and to help you appropriately plan for mitigating your Pollutants of Concern in lieu of implementing LID BMPs. Priority Development General Pollutant Categories Project Categories and/or Toxic Project Features (check those Bacterial Metals Nutrients Pesticides Organic Sediments Trash & Oil & that apply) Indicators Compounds Debris Grease Detached Residential P N P P N P P P Development Attached Residential P N P P N P P P(2) Development Commercial/Industrial P(3)P P(1) PM P(5) P(1)P P Development Automotive Repair N P N N P(4,5)N P P Shops 21 Restaurants P N N N N N P P 5,000 ft2) Hillside Development P N P P N P P P 5,000 ft2) m Parking Lots p(6)P PM PO)P(4) PO)P P 5,000 ft2) Retail Gasoline Outlets N P N N P N P P Project Priority Pollutant(s) of Concern P=Potential N=Not Potential i11 A potential Pollutant if non-native landscaping exists or is proposed onsite;otherwise not expected 2)A potential Pollutant if the project includes uncovered parking areas;otherwise not expected 3)A potential Pollutant is land use involving animal waste 1)Specifically petroleum hydrocarbons 5)Specifically solvents 6)Bacterial indicators are routinely detected in pavement runoff 30- Water Quality Management Plan(WQMP) Mexico Cafe F.2 Stormwater Credits Projects that cannot implement LID BMPs but nevertheless implement Smart Growth Principles are potentially eligible for Stormwater Credits. Utilize Table 3-7 within the WQMP Guidance Document to identify your Project Category and its associated Water Quality Credit. If not applicable,write N/A. Table F.2 Stormwater Credits Qualifying Project Categories Credit Percentage Total Credit Percentage' Cannot Exceed 50% 2Obtain corresponding data from Table 3-7 in the WQMP Guidance Document F.3 Sizing Criteria After you appropriately considered Stormwater Credits for your Project, utilize Table F.3 below to appropriately size them to the DCV,or Design Flow Rate, as applicable. Please reference Chapter 3.5.5 of the WQMP Guidance Document for further information. Post- DMA Project Effective DMA DMA x DMA (square Surface Impervious Runoff Runoff Type/ID feet) Type Fraction,If Factor Factor Enter BMP Name/Identifier Here A] B] C] A]x[C] Proposed Volume Total Storm or Flow Design Minimum DCV Water on Plans Storm or Design Flow Credit % (cubic Depth Rate (cubic Reduction feet or in) feet or cfs) cfs)I AT F=[D] [E)F] _ [ D]x[E] [ F]X(1-[H]) [I] F[A] G] _ B],[C]is obtained as described in Section 2.5 from the WQMP Guidance Document El is obtained from Exhibit A in the WQMP Guidance Document G]is for Flow-Based Treatment Control BMPs[G]=43,560,for Volume-Based Control Treatment BMPs,[G]=12 H]is from the Total Stormwater Credit Percentage as Calculated from Table E.2 above I]as obtained from a design procedure sheet from the BMP manufacturer and should be included in Appendix 6 31- Water Quality Management Plan(WQMP) Mexico Cafe F.4 Treatment Control BMP Selection Treatment Control BMPs typically provide proprietary treatment mechanisms to treat potential Pollutants in runoff,but do not sustain significant biological processes.Treatment Control BMPs must have a removal efficiency of a medium or high effectiveness as quantified below: High: equal to or greater than 80%removal efficiency Medium: between 40%and 80%removal efficiency Such removal efficiency documentation (e.g., studies, reports, etc.) as further discussed in Chapter 3.5.2 of the WQMP Guidance Document, must be included in Appendix 6. In addition, ensure that proposed Treatment Control BMPs are properly identified on the WQMP Site Plan in Appendix 1. Table F.4 freatment Control 660P 521ection Selected Treatment Control BMP Priority Pollutant(s)of Removal Efficiency Name or ID1 Concern to Mitigate' Percentage3 Treatment Control BMPs must not be constructed within Receiving Waters.In addition,a proposed Treatment Control BMP maybe listed more than once if they possess more than one qualifying pollutant removal efficiency. 2 Cross Reference Table E.1 above to populate this column. As documented in a Copermittee Approved Study and provided in Appendix 6. F.5 Hydrologic Performance Standard — Alternative Compliance Approach Alternative compliance options are only available if the governing Copermittee has acknowledged the infeasibility of onsite Hydrologic Control BMPs and approved an alternative compliance approach. Attach to Appendix 7 the Technical Feasibility Study(Projects equal or greater than one acre)or Simplified Technical Feasibility Study(Projects less than one acre)along with a written approval from the Copermittee.The applicant may refer to Section 2.2.iv of the SMR HMP for extensive guidelines on the alternative compliance approach. Select the pursued alternative and describe the specifics of the alternative: Offsite Hydrologic Control Management within the same channel system N/A In-Stream Restoration Project N/A 32- Water Quality Management Plan(WQMP) Mexico Cafe For©ffsite Hydrologic Control BMP Option Each Hydrologic Control BMP must be designed to ensure that the flow duration curve of the post- development DMA will not exceed that of the pre-existing, naturally occurring, DMA by more than ten percent over a one-year period. Using SMRHM,the applicant shall demonstrate that the performance of each designed Hydrologic Control BMP is equivalent with the Hydrologic Performance Standard for onsite conditions. Complete Table F.4 below and identify,for each Hydrologic Control BMP,the equivalent DMA the Hydrologic Control BMP mitigates,that the SMRHM model passed,the total volume capacity of the BMP,the BMP footprint at top floor elevation, and the drawdown time of the BMP. SMRHM summary reports for the alternative approach should be documented in Appendix 7. Refer to the SMRHM Guidance Document for additional information on SMRHM.You can add rows to the table as needed. Sa'uie i-.S Offsib,.:,Jrolo.,ir Conur)i BMP Sizirn-, BMP Name/Type Equivalent SMRHM BMP Volume BMP Drawdown DMA(ac) Passed (ac-ft) Footprint(ac) time(hr) El For Instream Restoration Option Attach to Appendix 7 the technical report detailing the condition of the receiving channel subject to the proposed hydrologic and sediment regimes. Provide the full design plans for the in-stream restoration project that have been approved by the Copermittee. F.6 Sediment Supply Performance Standard - Alternative Compliance The alternative compliance option to the Sediment Supply Performance Standard is only available if the governing Copermittee has approved the investigation of alternative Bed Sediment Supply options. Attach to Appendix 7 the Technical Feasibility Study, along with the modeling analysis,the long-term monitoring program, and the potential corrective actions,that demonstrate the performance of the overall alternative compliance program.The applicant may refer to Section 2.3.ii of the SMR HMP for extensive guidelines on the alternative compliance approach. Provide a narrative describing the alternative Bed Sediment Supply approach, including the long-term monitoring program and the findings of the numerical modeling. N/A 33 - Water Quality Management Plan(WQMP) Mexico Cafe Section G: Source Control BMPs Source Control BMPs include permanent, structural features that may be required in your Project plans such as roofs over and berms around trash and recycling areas—and Operational BMPs,such as regular sweeping and "housekeeping",that must be implemented by the site's occupant or user.The Maximum Extent Practicable (MEP) standard typically requires both types of BMPs. In general, Operational BMPs cannot be substituted for a feasible and effective structural BMP. Using the Pollutant Sources/Source Control Checklist in Appendix 8, review the following procedure to specify Source Control BMPs for your site: 1. Identify Pollutant Sources:Review Column 1 in the Pollutant Sources/Source Control Checklist.Check off the potential sources of Pollutants that apply to your site. 2. Note Locations on Project-Specific WQMP Exhibit: Note the corresponding requirements listed in Column 2 of the Pollutant Sources/Source Control Checklist. Show the location of each Pollutant source and each permanent Source Control BMP in your Project-Specific WQMP Exhibit located in Appendix 1. 3. Prepare a Table and Narrative: Check off the corresponding requirements listed in Column 3 in the Pollutant Sources/Source Control Checklist. In the left column of Table G.1 below, list each potential source of Pollutants on your site(from those that you checked in the Pollutant Sources/Source Control Checklist). In the middle column, list the corresponding permanent, Structural Source Control BMPs from Columns 2 and 3 of the Pollutant Sources/Source Control Checklist) used to prevent Pollutants from entering runoff. Add additional narrative in this column that explains any special features, materials or methods of construction that will be used to implement these permanent, Structural Source Control BMPs. 4. Identify Operational Source Control BMPs:To complete your table, refer once again to the Pollutant Sources/Source Control Checklist. List in the right column of your table the Operational BMPs that should be implemented as long as the anticipated activities continue at the site. Copermittee stormwater ordinances require that applicable Source Control BMPs be implemented;the same BMPs may also be required as a condition of a use permit or other revocable Discretionary Approval for use of the site. 34- Water Quality Management Plan(WQMP) Mexico Cafe Table G.1 Structural and Opts rational Source Control BMP Potential Sources of Operational Source Control BMPs Runoff Pollutants Structural Source Control BMPs A. On-site storm drain Mark all inlets with the words "Only Maintain and periodically repaint or inlets Rain Down the Storm Drain" or similar. replace inlet markings Catch Basin Markers may be available ° provide stormwater pollution from the Riverside County Flood prevention information to new site Control and Water Conservation j owners, lessees,or operators. District, call 951.955.1200 to verify. See applicable Operational BMPs in Include Catch Basin Filter Inserts in all Fact Sheet SC-44, "Drainage System inlets/catch basins onsite as a pre- Maintenance," in the CASQA treatment measure. Stormwater Quality Handbooks at www.cabmphaiidbooks.com D1. Need for future j Note building design features that Provide integrated Pest indoor & structural discourage entry of pests Management information to pest control owners, lessees, and operators. D2. Landscape/Outdoor State that final landscape plans will ° Maintain landscaping using Pesticide Use accomplish all of the following: minimum or no pesticides. Preserve existing native trees, shrubs, ° See applicable operational BMPs in and ground cover to the maximum "What you should know extent possible. for.....Landscape and Gardening" at Design landscaping to minimize http://rcflood.org/stormwater irrigation and runoff, to promote Provide IPM information to new surface infiltration where appropriate, owners, lessees, and operators. and to minimize the use of fertilizers and pesticides that can contribute to storm water pollution. Consider using pest resistant plants, especially adjacent to hardscape. To ensure successful establishment, select plants appropriate to soils, slopes, climate, sun, wind, rain, land use, air movement, ecological j consistency,-and-plant interactions. E. Pools, spas, ponds, ° If the Co-permittee requires pools to be ° See applicable operational BMPs in decorative plumbed to the sanitary sewer, place a "Guidelines for Maintaining Your foundations, and note on the plans and state in the Swimming Pool,Jacuzzi and Garden other water narrative that this connection will be Fountain" at features. made according to local requirements. http://j-cflood.orgstorni waLef 35- Water Quality Management Plan(WQMP) Mexico Cafe Potential Sources of Operational Source Control BMPs Runoff Pollutants Structural Source Control BMPs 9 F. Food Service Describe the location and features of See the brochure,"The Food Service the designated cleaning area. Industry Best Management Describe the items to be cleaned in this Practices for Restaurants, Grocery facility and how it has been sized to Stores, Delicatessens and Bakeries" insure that the largest items can be at http:Hrcflood.org/stormwater accommodated G. Refuse areas State how site refuse will be handled ° State how the following will be and provide supporting detail to what is implemented: shown on plans. Provide adequate number State that signs will be posted on or receptacles. Inspect receptacles near dumpsters with the words"Do not regularly; repair or replace leaky dump hazardous materials here" or receptacles. Keep receptacles similar. covered. Prohibit/prevent dumping of liquid or hazardous wastes. Post no hazardous materials" signs. Inspect and pick up litter daily and clean up spills immediately. Keep spill control materials available on- site. See Fact Sheet SC-34, "Waste Handling and Disposal" in the CASQA Stormwater Quality Handbook at www.cabmphandbooks.com P. Plazas, sidwalks, and N/A Sweep plazas, sidewalks, and parking lots parking lots regularly to prevent accumulation of litter and debris. Collect debris from pressure washing to prevent entry into the storm drain system. Collect wash water containing any cleaning agent or degreaser and discharge to the sanitary sewer not to a storm drain. 36- Water Quality Management Plan(WQMP) Mexico Cafe Section H: Construction Plan Checklist Populate Table H.1 below to assist the plan checker in an expeditious review of your project.The first two columns will contain information that was prepared in previous steps, while the last column will be populated with the corresponding plan sheets. This table is to be completed with the submittal of your final Project-Specific WQMP. H.1 Construction Plan Cross-reference BMP No.or ID BMP Identifier and Description Corresponding Plan Sheet(s) Al Bioretention Basin 1 Precise Grading Plan—GP-2 B1 Bioretention Basin 2 Precise Grading Plan—GP-2 C1 Bioretention Basin 3 Precise Grading Plan—GP-2 D1 Bioretention Basin 4 Precise Grading Plan—GP-2 I Note that the updated table—or Construction Plan WQMP Checklist— is only a reference tool to facilitate an easy comparison of the construction plans to your Project-Specific WQMP. The Copermittee with jurisdiction over the Project site can advise you regarding the process required to propose changes to the approved Project-Specific WQMP. 37- Water Quality Management Plan(WQMP) Mexico Cafe Section I: Operation, Maintenance and Funding The Copermittee with jurisdiction over the Project site will periodically verify that BMPs on your Project are maintained and continue to operate as designed.To make this possible,the Copermittee will require that you include in Appendix 9 of this Project-Specific WQMP: 1. A means to finance and implement maintenance of BMPs in perpetuity, including replacement cost. 2. Acceptance of responsibility for maintenance from the time the BMPs are constructed until responsibility for operation and maintenance is legally transferred.A warranty covering a period following construction may also be required. 3. An outline of general maintenance requirements for the Stormwater BMPs you have selected. 4. Figures delineating and designating pervious and impervious areas, location, and type of Stormwater BMP, and tables of pervious and impervious areas served by each facility. Geo- locating the BMPs using a coordinate system of latitude and longitude is recommended to help facilitate a future statewide database system. 5. A separate list and location of self-retaining areas or areas addressed by LID Principles that do not require specialized Operations and Maintenance or inspections but will require typical landscape maintenance as noted in Chapter 5, in the WQMP Guidance. Include a brief description of typical landscape maintenance for these areas. The Copermittee with jurisdiction over the Project site will also require that you prepare and submit a detailed BMP Operation and Maintenance Plan that sets forth a maintenance schedule for each of the BMPs built on your site. An agreement assigning responsibility for maintenance and providing for inspections and certification may also be required. Details of these requirements and instructions for preparing a BMP Operation and Maintenance Plan are in Chapter 5 of the WQMP Guidance Document. Maintenance Mechanism: Property Owner Will the proposed BMPs be maintained by a Homeowners' Association (HOA) or Property Owners Association (POA)? El N Include your Operation and Maintenance Plan and Maintenance Mechanism in Appendix 9.Additionally, include all pertinent forms of educational materials for those personnel that will be maintaining the proposed BMPs within this Project-Specific WQMP in Appendix 10. 38- Water Quality Management Plan(WQMP) Mexico Cafe Acronyms, Abbreviations and Definitions 2010 SMR MS4 Order No.R9-2010-0016,an NPDES Permit issued by the San Diego Permit Regional Water Quality Control Board. Applicant Public or private entity seeking the discretionary approval of new or replaced improvements from the Copermittee with jurisdiction over the project site.The Applicant has overall responsibility for the implementation and the approval of a Priority Development Project.The WQMP uses consistently the term"user"to refer to the applicant such as developer or project proponent. The WQMP employs also the designation "user" to identify the Registered Professional Civil Engineer responsible for submitting the Project-Specific WQMP,and designin.R the required BMPs. Best Management Defined in 40 CFR 122.2 as schedules of activities, prohibitions of Practice (BMP) Practices, maintenance procedures, and other management practices to prevent or reduce the pollution of waters of the United States. BMPs also include treatment requirements, operating procedures and practices to control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw material storage. In the case of municipal storm water permits, BMPs are ically used in place of numeric effluent limits. BMP Fact Sheets BMP Fact Sheets are available in the LID BMP Design Handbook. Individual BMP Fact Sheets include sitting considerations, and design and sizing guidelines for seven types of structural BMPs infiltration basin, infiltration trench, permeable pavement, harvest-and-use,bioretention, extended detention basin, and sand filter). California Publisher of the California Stormwater Best Management Practices Stormwater Quality Handbooks,available at Association (CASQA) %7ww.cabmLifia dbosrks.co rn. Conventional A type of BMP that provides treatment of stormwater runoff. Treatment Control Conventional treatment control BMPs, while designed to treat BMP particular Pollutants, typically do not provide the same level of volume reduction as LID BMPs, and commonly require more specialized maintenance than LID BMPs. As such, the 2010 SMR MS4 Permit and this WQMP require the use of LID BMPs wherever feasible, before Conventional Treatment BMPs can be considered or implemented. Copermittees The 2010 SMR MS4 Permit identifies the Cities of Murrieta, Temecula, and Wildomar, the County, and the District, as Co ermittees for the SMR. County The abbreviation refers to the County of Riverside in this document. 39- Water Quality Management Plan(WQMP) Mexico Cafe CEQA California Environmental Quality Act-a statute that requires state and local agencies to identify the significant environmental impacts of their actions and to avoid or mitigate those impacts,if feasible. CIMIS California Irrigation Management Information System-an integrated network of 118 automated active weather stations all over California managed by the California Department of Water Resources. CWA Clean Water Act-is the primary federal law governing water pollution. Passed in 1972,the CWA established the goals of eliminating releases of high amounts of toxic substances into water,eliminating additional water pollution by 1985,and ensuring that surface waters would meet standards necessary for human sports and recreation by 1983. CWA Section 402(p) is the federal statute requiring NPDES permits for discharges from MS4s. CWA Section 303(d) Impaired water in which water quality does not meet applicable Waterbody water quality standards and/or is not expected to meet water quality standards,even after the application of technology based pollution controls required by the CWA.The discharge of urban runoff to these water bodies by the Copermittees is significant because these discharges can cause or contribute to violations of applicable water quality standards. Design Storm The 2010 SMR MS4 Permit has established the 85th percentile,24- hour storm event as the"Design Storm".The applicant may refer to Exhibit A to identify the applicable Design Storm Depth(D85) to the project. DCV Design Capture Volume (DCV)is the volume of runoff produced from the Design Storm to be mitigated through LID Retention BMPs,Other LID BMPs and Volume Based Conventional Treatment BMPs,as appropriate. Design Flow Rate The design flow rate represents the minimum flow rate capacity that flow-based conventional treatment control BMPs should treat to the MEP,when considered. DCIA Directly Connected Impervious Areas-those impervious areas that are hydraulically connected to the MS4 (i.e.street curbs,catch basins, storm drains,etc.) and thence to the structural BMP without flowing over pervious areas. Discretionary A decision in which a Copermittee uses its judgment in deciding Approval whether and how to carry out or approve a project. District Riverside County Flood Control and Water Conservation District. DMA A Drainage Management Area-a delineated portion of a project site that is hydraulically connected to a common structural BMP or conveyance point. The Applicant may refer to Section 3.3 for further guidelines on how to delineate DMAs. 40- Water Quality Management Plan(WQMP) Mexico Cafe Drawdown Time Refers to the amount of time the design volume takes to pass through the BMP.The specified or incorporated drawdown times are to ensure that adequate contact or detention time has occurred for treatment,while not creating vector or other nuisance issues.It is important to abide by the drawdown time requirements stated in the fact sheet for each specific BMP. Effective Area Area which 1)is suitable for a BMP (for example,if infiltration is potentially feasible for the site based on infeasibility criteria, infiltration must be allowed over this area) and 2)receives runoff from impervious areas. ESA An Environmental Sensitive Area (ESA) designates an area "in which plants or animals life or their habitats are either rare or especially valuable because of their special nature or role in an ecosystem and which would be easily disturbed or degraded by human activities and developments". (Reference:California Public Resources Code§30107.5). ET Evapotranspiration(ET)is the loss of water to the atmosphere by the combined processes of evaporation(from soil and plant surfaces) and transpiration(from plant tissues). It is also an indicator of how much water crops,lawn, garden, and trees need for healthy growth and productivity FAR The Floor Area Ratio (FAR) is the total square feet of a building divided by the total square feet of the lot the building is located on. Flow-Based BMP Flow-based BMPs are conventional treatment control BMPs that are sized to treat the design flow rate. Fppp Facility Pollution Prevention Plan HCOC Hydrologic Condition of Concern-Exists when the alteration of a site's hydrologic regime caused by development would cause significant impacts on downstream channels and aquatic habitats, alone or in conjunction with impacts of other projects. HMP Hydromodification Management Plan-Plan defining Performance Standards for PDPs to manage increases in runoff discharge rates and durations. Hydrologic Control BMP to mitigate the increases in runoff discharge rates and BMP durations and meet the Performance Standards set forth in the HMP. HSG Hydrologic Soil Groups - soil classification to indicate the minimum rate of infiltration obtained for bare soil after prolonged wetting. The HSGs are A (very low runoff potential/high infiltration rate), B, C, and D (high runoff potential/very low infiltration rate) 41- Water Quality Management Plan(WQMP) Mexico Cafe Hydromodification The 2010 SMR MS4 Permit identifies that increased volume, velocity, frequency and discharge duration of storm water runoff from developed areas has the potential to greatly accelerate downstream erosion, impair stream habitat in natural drainages, and negatively impact beneficial uses. JRMP A separate Jurisdictional Runoff Management Plan (JRMP) has been developed by each Copermittee and identifies the local programs and activities that the Copermittee is implementing to meet the 2010 SMR MS4 Permit requirements. LID Low Impact Development(LID)is a site design strategy with a goal of maintaining or replicating the pre-development hydrologic regime through the use of design techniques.LID site design BMPs help preserve and restore the natural hydrologic cycle of the site, allowing for filtration and infiltration which can greatly reduce the volume,peak flow rate,velocity,and pollutant loads of storm water runoff. LID BMP A type of stormwater BMP that is based upon Low Impact Development concepts.LID BMPs not only provide highly effective treatment of stormwater runoff, but also yield potentially significant reductions in runoff volume-helping to mimic the pre- project hydrologic regime, and also require less ongoing maintenance than Treatment Control BMPs. The applicant may refer to Chapter 2. LID BMP Design The LID BMP Design Handbook was developed by the Handbook Copermittees to provide guidance for the planning, design and maintenance of LID BMPs which may be used to mitigate the water quality impacts of PDPs within the County. LID Bioretention BMP LID Bioretention BMPs are bioretention areas are vegetated (i.e., landscaped) shallow depressions that provide storage,infiltration, and evapotranspiration, and provide for pollutant removal (e.g., filtration, adsorption, nutrient uptake) by filtering stormwater through the vegetation and soils.In bioretention areas,pore spaces and organic material in the soils help to retain water in the form of soil moisture and to promote the adsorption of pollutants (e.g., dissolved metals and petroleum hydrocarbons)into the soil matrix. Plants use soil moisture and promote the drying of the soil through transpiration. The 2010 SMR MS4 Permit defines "retain' as to keep or hold in a particular place,condition,or position without discharge to surface waters. LID Biotreatment BMPs that reduce stormwater pollutant discharges by intercepting BMp rainfall on vegetative canopy, and through incidental infiltration and/or evapotranspiration,and filtration,and other biological and chemical processes. As stormwater passes down through the planting soil, pollutants are filtered, adsorbed, biodegraded, and sequestered by the soil and plants, and collected through an underdrain. 42- Water Quality Management Plan(WQMP) Mexico Cafe LID Harvest and BMPs used to facilitate capturing Stormwater Runoff for later use Reuse BMP without negatively impacting downstream water rights or other Beneficial Uses. LID Infiltration BMP BMPs to reduce stormwater runoff by capturing and infiltrating the runoff into in-situ soils or amended onsite soils. Typical LID Infiltration BMPs include infiltration basins, infiltration trenches and pervious avements. LID Retention BMP BMPs to ensure full onsite retention without runoff of the DCV such as infiltration basins, bioretention, chambers, trenches, permeable pavement and pavers,harvest and reuse. LID Principles Site design concepts that prevent or minimize the causes (or drivers) of post-construction impacts, and help mimic the pre- development hydrologic regime. MEP Maximum Extent Practicable - standard established by the 1987 amendments to the CWA for the reduction of Pollutant discharges from MS4s. Refer to Attachment C of the 2010 SMR MS4 Permit for a complete definition of MEP. MF Multi-family - zoning classification for parcels having 2 or more living residential units. MS4 Municipal Separate Storm Sewer System (MS4) is a conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, or storm drains): (i) Owned or operated by a State, city, town,borough,county,parish, district,association,or other public body(created by or pursuant to State law)having jurisdiction over disposal of sewage,industrial wastes,storm water,or other wastes, including special districts under State law such as a sewer district, flood control district or drainage district, or similar entity, or an Indian tribe or an authorized Indian tribal organization, or designated and approved management agency under section 208 of the CWA that discharges to waters of the United States; (ii) Designated or used for collecting or conveying storm water; (iii) Which is not a combined sewer; (iv) Which is not part of the Publicly Owned Treatment Works (POTW) as defined at 40 CFR 122.26. New Development Defined by the 2010 MS4 permit as 'Priority Development Projects' Project if the project,or a component of the project meets the categories and thresholds described in Section 1.1.1. NPDES National Pollution Discharge Elimination System - Federal program for issuing, modifying, revoking and reissuing, terminating, monitoring and enforcing permits, and imposing and enforcing pretreatment requirements,under Sections 307,318,402, and 405 of the CWA. NRCS Natural Resources Conservation Service 43- Water Quality Management Plan(WQMP) Mexico Cafe PDP Priority Development Project - Includes New Development and Redevelopment project categories listed in Section F.1.d(2)of Order No.R9-2009-0002. Priority Pollutants of Pollutants expected to be present on the project site and for which Concern a downstream water body is also listed as Impaired under the CWA Section 303(d)list or by a TMDL. Project-Specific A plan specifying and documenting permanent LID Principles and WQMp Stormwater BMPs to control post-construction Pollutants and stormwater runoff for the life of the PDP, and the plans for operation and maintenance of those BMPs for the life of the project. Receiving Waters Waters of the United States. Redevelopment The creation, addition, and or replacement of impervious surface Project on an already developed site.Examples include the expansion of a building footprint, road widening, the addition to or replacement of a structure, and creation or addition of impervious surfaces. Replacement of impervious surfaces includes any activity that is not part of a routine maintenance activity where impervious material(s) are removed, exposing underlying soil during construction. Redevelopment does not include trenching and resurfacing associated with utility work; resurfacing existing roadways; new sidewalk construction, pedestrian ramps, or bike lane on existing roads; and routine replacement of damaged pavement,such as pothole repair. Project that meets the criteria described in Section 1. Runoff Fund Runoff Funds have not been established by the Copermittees and are not available to the Applicant. If established, a Runoff Fund will develop regional mitigation projects where PDPs will be able to buy mitigation credits if it is determined that implementing onsite controls is infeasible. San Diego Regional San Diego Regional Water Quality Control Board - The term Board "Regional Board", as defined in Water Code section 13050(b), is intended to refer to the California Regional Water Quality Control Board for the San Diego Region as specified in Water Code Section 13200.State agency responsible for managing and regulating water quality in the SMR. SCCWRP Southern California Coastal Water Research Project Site Design BMP Site design BMPs prevent or minimize the causes (or drivers) of post-construction impacts, and help mimic the pre-development hydrologic regime. SF Parcels with a zoning classification for a single residential unit. SMC Southern California Stormwater Monitoring Coalition SMR The Santa Margarita Region (SMR) represents the portion of the Santa Margarita Watershed that is included within the County of Riverside. 44- Water Quality Management Plan(WQMP) Mexico Cafe Source Control BMP Source Control BMPs land use or site planning practices, or structural or nonstructural measures that aim to prevent runoff pollution by reducing the potential for contamination at the source of pollution. Source control BMPs minimize the contact between Pollutants and runoff. Stormwater Credit Stormwater Credit can be claimed by an Applicant if certain development practices that provide broad-scale environmental benefits to communities are incorporated into the project design. Refer to Section 3.5.4 for additional information on Stormwater Credits. Structural BMP Structures designed to remove pollutants from stormwater runoff and mitigate h dromodification impacts. Syyppp Storm Water Pollution Prevention Plan Tentative Tract Map Tentative Tract Maps are required for all subdivision creating five 5) or more parcels, five (5) or more condominiums as defined in Section 783 of the California Civil Code, a community apartment project containing five (5) or more parcels,or for the conversion of a dwelling to a stock cooperative containing five (5) or more dwelling units. TMDL Total Maximum Daily Load-the maximum amount of a Pollutant that can be discharged into a waterbody from all sources(point and non-point) and still maintain Water Quality Standards. Under CWA Section 303(d), TMDLs must be developed for all waterbodies that do not meet Water Quality Standards after application of technology-based controls. USEPA United States Environmental Protection Agency Volume-Based BMP Volume-Based BMPs applies to BMPs where the primary mode of pollutant removal depends upon the volumetric capacity such as detention,retention,and infiltrations stems. wQmp Water Quality Management Plan Wet Season The 2010 SMR MS4 Permit defines the wet season from October 1 through April 30. 45- Water Quality Management Plan CWQMP) Mexico Cafe Appendix 1: Maps and Site Plans Location Map, WQMP Site Plan and Receiving Waters Map Water Quality Management Plan(WQMP) Mexico Cafe Figure 1 — Vicinity Map t.• ' S 7'15 r., 7 y, Z;. I,`',. 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