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Task 4.9 Public Draft Page 2 Task 4.9 Stormwater Resource Plan Public Draft Version 0.1 Drafted: December 4, 2017 STORMWATER RESOURCE PLAN – TASK 4.9 PUBLIC DRAFT PAGE 2 TABLE OF CONTENTS TABLE OF CONTENTS .............................................................................................................................. 2 ACRONYMS ............................................................................................................................................ 4 EXECUTIVE SUMMARY ............................................................................................................................ 5 INTRODUCTION .................................................................................................................................... 11 IMPLEMENTERS .............................................................................................................................................. 12 PARTNERS ...................................................................................................................................................... 12 OTHERS ........................................................................................................................................................... 13 SECTION A. DESCRIPTION OF WATERSHED AND SUB-WATERSHEDS .................................................... 14 WATERSHED BOUNDARIES (SWRP GUIDELINES SECTION A.I) ................................................................ 14 INTERNAL BOUNDARIES (SWRP GUIDELINES SECTION A.II) .................................................................... 14 WATER QUALITY PRIORITIZATION (SWRP GUIDELINES SECTION A. III)................................................... 23 SURFACE AND GROUNDWATER QUALITY (SWRP GUIDELINES SECTION A. IV) .................................. 26 WATER SUPPLY (SWRP GUIDELINES SECTION A.V) .................................................................................. 31 NATIVE HABITATS (SWRP GUIDELINES SECTION A. VI) ............................................................................ 32 WATERSHED PROCESSES (SWRP GUIDELINES SECTION A.VII) ............................................................... 34 SECTION B. ORGANIZATION, COORDINATION & COLLABORATION .................................................. 36 IRWM PARTNERSHIP (SWRP GUIDELINES SECTION B.I & B.VI) ................................................................ 36 SWRP STAKEHOLDERS (SWRP GUIDELINES SECTION B.II & B.III) ............................................................. 36 REQUIRED DECISIONS (SWRP GUIDELINES SECTION B.V) ...................................................................... 38 OTHER CONSIDERATIONS (SWRP GUIDELINES SECTION B.IV & B.VII)................................................... 38 SECTIONS C&D METHODS & PROJECT PRIORITIZATION ....................................................................... 39 TAHOE IDENTIFICATION OF PROJECTS (SWRP GUIDELINES SECTION C.1) .......................................... 39 TAHOE METRICS-BASED ANALYSIS (SWRP GUIDELINES SECTION C.2) ................................................. 40 TAHOE GUIDANCE FOR PRIORITIZING PROJECTS (SWRP GUIDELINES SECTION D.1)........................ 42 TAHOE WATER QUALITY ANALYSIS (SWRP GUIDELINES SECTION C.2.A) ............................................. 43 TAHOE MULTIPLE BENEFITS (SWRP GUIDELINES SECTION D.2) ............................................................... 44 TAHOE DATA MANAGEMENT (SWRP GUIDELINES SECTION C.3) ......................................................... 45 NON-TAHOE IDENTIFICATION OF PROJECTS (SWRP GUIDELINES SECTION C.1) ................................ 46 NON-TAHOE METRICS-BASED ANALYSIS (SWRP GUIDELINES SECTION C.2) ....................................... 46 NON-TAHOE GUIDANCE FOR PRIORITIZING PROJECTS (SWRP GUIDELINES SECTION D.1) ............. 48 NON-TAHOE WATER QUALITY ANALYSIS (SWRP GUIDELINES SECTION C.2.A) ................................... 50 NON-TAHOE MULTIPLE BENEFITS (SWRP GUIDELINES SECTION D.2) ..................................................... 51 NON-TAHOE DATA MANAGEMENT (SWRP GUIDELINES SECTION C.3) ............................................... 52 SECTION E. PLAN IMPLEMENTATION STRATEGY AND SCHEDULING OF PROJECTS ............................. 53 RESOURCES FOR PLAN IMPLEMENTATION (SWRP GUIDELINES SECTION E.1) ..................................... 53 IMPLEMENTATION PROGRAM (SWRP GUIDELINES SECTION E.2) ......................................................... 53 ADAPTIVE MANAGEMENT (SWRP GUIDELINES SECTION E.3) & PERFORMANCE MEASURES (SWRP GUIDELINES SECTION E.4) ........................................................................................................................... 55 TASK 4.9 PUBLIC DRAFT STORMWATER RESOURCE PLAN – TASK 4.9 PUBLIC DRAFT PAGE 3 SECTION F. EDUCATION, OUTREACH, AND PUBLIC PARTICIPATION ................................................... 59 PUBLIC EDUCATION & PARTICIPATION (SWRP GUIDELINES SECTION F.I & F.II) .................................. 59 AFFECTED COMMUNITIES (SWRP GUIDELINES SECTION F.III) ................................................................. 59 SPECIFIC AUDIENCES (SWRP GUIDELINES SECTION F.IV & F.V) ............................................................ 59 ENVIRONMENTAL INJUSTICE (SWRP GUIDELINES SECTION F.VI) ........................................................... 60 ENGAGEMENT & COMMUNICATION SCHEDULE (SWRP GUIDELINES SECTION F.VII) ....................... 60 APPENDIX A – COMMUNITY WATER SUPPLIERS.................................................................................... 62 APPENDIX B – CDPH REGULATED WATER SYSTEMS .............................................................................. 63 APPENDIX C – 303D LISTED WATERBODIES .......................................................................................... 64 APPENDIX D – TAHOE PROJECT LIST BY JURISDICTION ........................................................................ 65 APPENDIX E – TAHOE METRIC INFORMATION SHEETS .......................................................................... 66 APPENDIX F – BENEFIT CATEGORY BY TAHOE PROJECT ...................................................................... 67 APPENDIX G – ESTIMATED TAHOE PROJECT BENEFITS AND SCORES ................................................... 69 APPENDIX H – PRIORITIZED TAHOE PROJECT LISTS ............................................................................... 76 APPENDIX I – NON-TAHOE PROJECT LIST BY JURISDICTION ................................................................ 77 APPENDIX J – NON-TAHOE METRIC INFORMATION SHEETS ................................................................ 78 APPENDIX K – BENEFIT CATEGORY BY NON-TAHOE PROJECT ............................................................ 79 APPENDIX L – ESTIMATED NON-TAHOE PROJECT BENEFITS AND SCORES ........................................... 80 APPENDIX M – PRIORITIZED NON-TAHOE PROJECT LISTS .................................................................... 84 APPENDIX N – EXPECTED PROJECT FUNDING NEED ............................................................................ 85 APPENDIX O – SWRP TRACKER PRODUCTS .......................................................................................... 87 TASK 4.9 PUBLIC DRAFT STORMWATER RESOURCE PLAN – TASK 4.9 PUBLIC DRAFT PAGE 4 ACRONYMS BMP Best management practices CDFW California Department of Fish and Wildlife CDPH California Department of Public Health CERCLA Comprehensive Environmental Response, Compensation, and Liability Act CWA Clean Water Act CWD County Water District DAC Disadvantaged Community DDW Division of Drinking Water DWR Department of Water Resources EI Environmental Injustice EIP Environmental Improvement Program GAMA Groundwater Ambient Monitoring and Assessment HU Hydrologic Unit HUC Hydrologic Unit Code IRWM Integrated Regional Water Management IRWMP Integrated Regional Water Management Plan Lahontan RWQCB Regional Water Quality Control Board Lahontan Region Tahoe-basin Lake Tahoe Basin MCL Maximum Contaminant Levels MTBE Methyl tert-butyl ether NPDES National Pollutant Discharge Elimination System PCB Polychlorinated Biphenyls PHG Public Health Goals PLRM Pollutant Load Reduction Model Pollutant Load Reduction Plan PLRP PM Performance Measures PUD Public Utility District Region Tahoe-Sierra Planning Region RM Rational Method RWQCB California Regional Water Quality Control Boards SDWA Safe Drinking Water Act SEZ Stream Environment Zones SWRP Stormwater Resource Plan SWMP Stormwater Management Program SWQCB California State Water Resources Control Board TDS Total Dissolved Solid TMDL Total Maximum Daily Load TRPA Tahoe Regional Planning Agency TSS Total Suspended Solid UIC Underground Injection Control USEPA US Environmental Protection Agency UST Underground Storage Tank WDR Waste Discharge Requirement WQO Water Quality Objective TASK 4.9 PUBLIC DRAFT STORMWATER RESOURCE PLAN – TASK 4.9 PUBLIC DRAFT PAGE 5 EXECUTIVE SUMMARY This Stormwater Resource Plan (SWRP) makes Tahoe-Sierra projects eligible for California bond funding and is intended to build funders’ confidence in the multiple benefits that accrue from stormwater efforts in this Region. The SWRP describes the characteristics of the region, notably dividing the region into Tahoe Basin and Non-Tahoe areas to provide targeted metrics that meet the needs of these different areas. These metrics are used to rank projects based on a simple process using a 5-point scale. Expected benefits of the projects included in the SWRP are
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