Hecker Pass Specific Plan/South Valley Community Church
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VOLUME I – DRAFT ENVIRONMENTAL IMPACT REPORT HECKER PASS SPECIFIC PLAN/SOUTH VALLEY COMMUNITY CHURCH SCH #2003012119 PREPARED FOR City of Gilroy May 24, 2004 HECKER PASS SPECIFIC PLAN/SOUTH VALLEY COMMUNITY CHURCH Volume I –Draft Environmental Impact Report PREPARED FOR City of Gilroy Melissa Durkin Planner II 7351 Rosanna Street Gilroy, CA 95020 PREPARED BY EMC Planning Group Inc 301 Lighthouse Avenue Suite C Monterey CA 93940 Tel 831.649.1799 Fax 831.649.8399 [email protected] www.emcplanning.com May 24, 2004 Table of Contents Summary .......................................................................... S-1 1.0 Introduction .................................................................. 1-1 1.1 Authorization and Purpose ........................................................ 1-1 1.2 Project Location and Setting ...................................................... 1-3 1.3 Project Background and Description .......................................... 1-17 1.4 Consistency with Local and Regional Plans ................................. 1-37 1.5 EIR Uses ............................................................................. 1-44 2.0 Environmental Setting, Impacts, and Mitigation Measures ....... 2-1 2.1 Aesthetics .............................................................................. 2-1 2.2 Agricultural Resources ........................................................... 2-21 2.3 Air Quality .......................................................................... 2-41 2.4 Biological Resources .............................................................. 2-54 2.5 Cultural Resources ................................................................ 2-84 2.6 Geology .............................................................................. 2-97 2.7 Hazards and Hazardous Materials ............................................ 2-107 2.8 Hydrology and Water Quality ................................................. 2-117 2.9 Land Use ............................................................................ 2-133 2.10 Mineral Resources ................................................................ 2-139 2.11 Noise ................................................................................. 2-142 2.12 Public Services ..................................................................... 2-155 2.13 Transportation ..................................................................... 2-169 2.14 Utilities and Service Systems ................................................... 2-195 3.0 Related Environmental Issues ............................................ 3-1 3.1 Cumulative Impacts ................................................................. 3-1 EMC Planning Group Inc. 3.2 Growth Inducing Impacts ........................................................ 3-12 3.3 Significant Unavoidable Impacts ............................................... 3-14 3.4 Significant Irreversible Environmental Changes ............................ 3-15 3.5 Alternatives .......................................................................... 3-16 4.0 References ..................................................................... 4-1 4.1 Literature Cited ...................................................................... 4-1 4.2 Persons Contacted................................................................... 4-4 4.3 Report Preparers ..................................................................... 4-4 Appendices Appendix A Notice of Preparation and Responses Appendix B Proposed General Plan Amendment Text Appendix C Land Evaluation and Site Assessment Appendix D SB 610 Water Supply Assessment List of Figures Figure 1 Regional Location ................................................................ 1-5 Figure 2 Project Vicinity .................................................................... 1-7 Figure 3 Property Ownership Map ....................................................... 1-9 Figure 4 Existing Land Uses .............................................................. 1-11 Figure 5a Site Photographs ................................................................. 1-13 Figure 5b Site Photographs ................................................................. 1-15 Figure 6 Specific Plan Land Use Map ................................................... 1-25 EMC Planning Group Inc. Figure 7 South Valley Community Church Project ................................. 1-31 Figure 8 Church Project Elevation ...................................................... 1-33 Figure 9 Church Project Elevations: Preschool and Gymnasium Buildings ....................................................................................... 1-35 Figure 10 Viewshed Photo: Hecker Pass Highway ..................................... 2-5 Figure 11 Viewshed Photo: Santa Teresa Boulevard .................................. 2-7 Figure 12 Important Farmland Map ..................................................... 2-27 Figure 13 Habitat Types .................................................................... 2-61 Figure 14 Historic Resources Map ....................................................... 2-87 Figure 15 Preliminary Geologic Map ................................................... 2-99 Figure 16 Very High Fire Hazard Areas ................................................ 2-109 Figure 17 Consolidated Hazards/Setback Map ...................................... 2-127 Figure 18 Hecker Pass Land Use Diagram ............................................ 2-135 Figure 19 Conceptual Circulation Plan ................................................ 2-181 Figure 20 Specific Plan Conceptual Trail Systems Plan ............................ 2-185 Figure 21 Potable Water Plan ............................................................ 2-201 Figure 22 Recycled Water Plan .......................................................... 2-203 Figure 23 Sanitary Sewer Plan ........................................................... 2-211 Figure 24 Storm Drainage Plan .......................................................... 2-219 Figure 25 Alternative 1: General Plan Target Dwelling Unit/Clustering ...... 3-23 Figure 26 Alternative 2: Reduced Dwelling Unit/Clustering ...................... 3-31 EMC Planning Group Inc. List of Tables Table 1 Land Use Designation Acreages .............................................. 1-22 Table 2 Summary of Church Project Components ................................. 1-30 Table 3 Important Farmland Summary ............................................... 2-25 Table 4 Common Air Pollutants ....................................................... 2-43 Table 5 Sensitive Receptors and Associated Land Uses .......................... 2-45 Table 6 San Francisco Bay Air Basin Attainment Status Designations ....... 2-45 Table 7 Federal and State Ambient Air Quality Standards ...................... 2-47 Table 8 URBEMIS7G Modeling Results (Pounds Per Day) ..................... 2-51 Table 9 Special-Status Species Initially Judged to Potentially Occur in the Hecker Pass Specific Plan Area ............................. 2-64 Table 10 Existing Specific Plan Area Noise Levels ................................ 2-143 Table 11 The A-Weighted Decibel Scale, Human Response, and Common Noise Sources ................................................ 2-145 Table 12 Permissible Maximum Outdoor and Indoor Noise Levels ........... 2-146 Table 13 Gilroy Unified School District Student Generation Rates .......... 2-163 Table 14 Existing Intersection Operations .......................................... 2-172 Table 15 Existing Road Segment Operations ....................................... 2-174 Table 16 Background Intersection Operations ...................................... 2-175 Table 17 Background Road Segment Operations .................................. 2-176 Table 18 Specific Plan Trip Generation and Distribution ....................... 2-187 Table 19 Background Plus HPSP Build Out Intersection Operations ......... 2-188 Table 20 Background Plus HPSP Build Out Road Segment Operations ...... 2-189 EMC Planning Group Inc. Table 21 Background Plus Church Intersection Operations ..................... 2-191 Table 22 Background Plus Church Project Road Segment Operations ........ 2-192 Table 23 Existing Water Use ............................................................ 2-197 Table 24 Estimated Potable Water Use ................................................ 2-200 Table 25 Estimated Recycled Water Use .............................................. 2-200 Table 26 Estimated Agricultural Use from Existing Wells ....................... 2-205 Table 27 Estimated Wastewater Flow ................................................ 2-210 Table 28 General Plan Land Use and Build Out Calculations ..................... 3-3 Table 29 Existing Plus General Plan Build Out Calculations ...................... 3-3 EMC Planning Group Inc. This side intentionally left blank. EMC Planning Group Inc. Summary CEQA Guidelines section 15123 requires an EIR to contain a brief summary of the proposed project and its consequences. The summary identifies each significant effect and the proposed mitigation measures and alternatives to reduce or avoid that effect; areas of controversy known to the lead agency; and issues to be resolved, including the choice among alternatives and whether or how to mitigate the significant effects. Summary of Proposed Project Location The specific plan area and the South Valley Community Church site, which is within the specific plan