INITIAL STUDY/ MITIGATED NEGATIVE DECLARATION (IP 16-198) PETERS CANYON REGIONAL PARK GENERAL DEVELOPMENT PLAN AND RESOURCE MANAGEMENT PLAN ORANGE COUNTY, CALIFORNIA Prepared for: COUNTY OF ORANGE ORANGE COUNTY PARKS 13042 Old Myford Road Irvine, California, 92602 Prepared by: CHAMBERS GROUP, INC. 5 Hutton Centre Drive, Suite 750 Santa Ana, California 92707 (949) 261-5414 JUNE 2019 Initial Study/Mitigated Negative Declaration for Peters Canyon Regional Park General Development Plan and Resource Management Plan Orange County, California TABLE OF CONTENTS Page SECTION 1.0 – INTRODUCTION ........................................................................................................... 1 1.1 PURPOSE OF THE NOTICE OF INTENT TO ADOPT AND INITIAL STUDY ......................................... 1 1.2 PROJECT LOCATION AND SITE CHARACTERISTICS ........................................................................ 1 1.2.1 Project Background .......................................................................................................... 1 1.2.2 Location ............................................................................................................................ 2 1.3 PROJECT DESCRIPTION ................................................................................................................. 2 1.3.1 General Development Plan .............................................................................................. 5 1.3.2 Resource Management Plan ............................................................................................ 9 1.3.3 Construction Staging Areas and Disposal Sites .............................................................. 13 1.3.4 Construction Personnel and Equipment ........................................................................ 14 1.3.5 Implementation Schedule .............................................................................................. 16 1.4 REQUIRED PERMITS AND APPROVALS........................................................................................ 18 1.4.1 Lead Agency Approval .................................................................................................... 18 1.4.2 Reviewing Agencies ........................................................................................................ 19 1.4.3 Responsible Agencies and Respective Discretionary Actions ........................................ 19 SECTION 2.0 – ENVIRONMENTAL DETERMINATION ........................................................................... 20 SECTION 3.0 – ENVIRONMENTAL IMPACTS ....................................................................................... 21 3.1 ORGANIZATION OF ENVIRONMENTAL ANALYSIS ....................................................................... 21 3.2 TERMINOLOGY USED IN THIS ANALYSIS ..................................................................................... 21 3.3 EVALUATION OF ENVIRONMENTAL IMPACTS ............................................................................ 21 3.3.1 Aesthetics ....................................................................................................................... 22 3.3.2 Agricultural and Forestry Resources .............................................................................. 25 3.3.3 Air Quality ...................................................................................................................... 26 3.3.4 Biological Resources ....................................................................................................... 39 3.3.5 Cultural Resources ......................................................................................................... 48 3.3.6 Energy ............................................................................................................................ 52 3.3.7 Geology and Soils ........................................................................................................... 52 3.3.8 Greenhouse Gas Emissions ............................................................................................ 59 3.3.9 Hazards and Hazardous Materials ................................................................................. 61 3.3.10 Hydrology and Water Quality ........................................................................................ 64 3.3.11 Land Use & Planning ...................................................................................................... 70 3.3.12 Mineral Resources ......................................................................................................... 71 3.3.13 Noise .............................................................................................................................. 72 3.3.14 Population and Housing ................................................................................................. 77 3.3.15 Public Services ................................................................................................................ 78 3.3.16 Recreation ...................................................................................................................... 80 3.3.17 Transportation ............................................................................................................... 81 Chambers Group, Inc. ii 2019 20924.02 Initial Study/Mitigated Negative Declaration for Peters Canyon Regional Park General Development Plan and Resource Management Plan Orange County, California 3.3.18 Tribal Cultural Resources ............................................................................................... 88 3.3.19 Utilities and Service Systems ......................................................................................... 90 3.3.20 Wildfire........................................................................................................................... 93 3.3.21 Mandatory Findings of Significance ............................................................................... 94 SECTION 4.0 – SUMMARY OF MITIGATION MEASURES ...................................................................... 98 SECTION 5.0 – REFERENCES ............................................................................................................ 103 APPENDICES APPENDIX A – AIR QUALITY ANALYSIS APPENDIX B – PLANT AND WILDLIFE OBSERVED SPECIES LISTS APPENDIX C – BIOLOGICAL RESOURCES REPORTS APPENDIX D – PALEONTOLOGICAL RESOURCES REPORT APPENDIX E – CULTURAL RESOURCES ASSESSMENT REPORT APPENDIX F – GREENHOUSE GASES APPENDIX G – NOISE APPENDIX H – TRAFFIC IMPACT STUDY APPENDIX I – UTILITIES SERVICES FEASIBILITY ANALYSIS Chambers Group, Inc. iii 2019 20924.02 Initial Study/Mitigated Negative Declaration for Peters Canyon Regional Park General Development Plan and Resource Management Plan Orange County, California LIST OF TABLES Page Table 1: Existing and Proposed Trails............................................................................................................ 9 Table 2: Equipment per Construction Activity by Project ........................................................................... 16 Table 3: Construction Schedule and Estimated Number of Workers ......................................................... 16 Table 4: Designations/Classifications for the Project Area ......................................................................... 28 Table 5: Ambient Air Quality Monitoring Summary ................................................................................... 30 Table 6: Regional Thresholds of Significance .............................................................................................. 33 Table 7: Local Thresholds of Significance .................................................................................................... 33 Table 8: Construction-Related Regional Criteria Pollutant Emissions ........................................................ 34 Table 9: Construction-Related Local Criteria Pollutant Emissions .............................................................. 35 Table 10: Operations-Related Regional Criteria Pollutant Emissions ......................................................... 37 Table 11: Operations-Related Local Criteria Pollutant Emissions ............................................................... 38 Table 12: Annual Greenhouse Gas Emissions from the Proposed Project ................................................. 60 Table 13: Existing Noise Level Measurements ............................................................................................ 72 Table 14: Operational On-site Noise Impacts to the Nearest Homes ......................................................... 75 Table 15: Typical Construction Equipment Vibration Emissions ................................................................ 76 Table 16: Existing Traffic Conditions Analysis ............................................................................................. 83 Table 17: Level of Service (LOS) by Intersection Capacity Utilization (ICU) ................................................ 84 Table 18: Significant Impact Criteria for Signalized Intersections .............................................................. 84 Table 19: Significant Impacts for Future Year 2035 .................................................................................... 86 Table 20: Cumulative Projects in the Project Area 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