Final Initial Study/Proposed Mitigated Negative Declaration for The
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Final Initial Study/Mitigated Negative Declaration for the Chelsea Wetlands Restoration Project City of Hercules, California Prepared For: City of Hercules Planning Department 111 Civic Drive Hercules, California 94547 Contact: Holly Smyth, AICP, Planning Director Prepared By: WRA, Inc. 2169-G East Francisco Boulevard San Rafael, California 94901 Contact: Geoff Reilly, AICP September, 2016 TABLE OF CONTENTS 1.0 INTRODUCTION AND PURPOSE .........................................................................................4 2.0 PROJECT INFORMATION.....................................................................................................5 2.1 PROJECT TITLE .....................................................................................................................5 2.2 LEAD AGENCY NAME AND ADDRESS.......................................................................................5 2.3 CONTACT PERSON AND PHONE NUMBER ...............................................................................5 2.4 PROJECT LOCATION ..............................................................................................................5 2.5 GENERAL PLAN DESIGNATION AND ZONING DISTRICT .............................................................8 2.6 SURROUNDING LAND USES AND SETTING...............................................................................8 3.0 PROJECT DESCRIPTION ...................................................................................................10 3.1 PROJECT BACKGROUND ......................................................................................................10 3.2 PROPOSED PROJECT ..........................................................................................................10 3.3 CONSTRUCTION ..................................................................................................................24 3.4 PROJECT–RELATED APPROVALS,AGREEMENTS, AND PERMITS ............................................25 4.0 ENVIRONMENTAL SETTING ..............................................................................................26 4.1 HISTORIC LAND USE............................................................................................................26 4.2 CURRENT LAND USE ...........................................................................................................26 4.3 SURROUNDING LAND USES AND HABITATS...........................................................................26 5.0 ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED ..............................................28 DETERMINATION........................................................................................................................28 INITIAL STUDY CHECKLIST .........................................................................................................29 5.1 AESTHETICS........................................................................................................................30 5.2 AGRICULTURAL AND FORESTRY RESOURCES .......................................................................32 5.3 AIR QUALITY .......................................................................................................................34 5.4 BIOLOGICAL RESOURCES ....................................................................................................46 5.5 CULTURAL RESOURCES.......................................................................................................73 5.6 GEOLOGY AND SOILS ..........................................................................................................77 5.7 GREENHOUSE GAS EMISSIONS ............................................................................................81 5.8 HAZARDS AND HAZARDOUS MATERIALS ...............................................................................84 5.9 HYDROLOGY AND WATER QUALITY ......................................................................................90 5.10 LAND USE AND PLANNING................................................................................................105 5.11 MINERAL RESOURCES .....................................................................................................112 5.12 NOISE .............................................................................................................................113 5.13 POPULATION AND HOUSING .............................................................................................125 5.14 PUBLIC SERVICES ...........................................................................................................126 5.15 RECREATION...................................................................................................................128 5.16 TRANSPORTATION AND TRAFFIC ......................................................................................129 5.17 UTILITIES AND SERVICE SYSTEMS....................................................................................132 5.18 MANDATORY AND FINDINGS OF SIGNIFICANCE..................................................................134 6.0 REPORT PREPARERS AND PERSONS/ORGANIZATIONS CONSULTED....................137 7.0 REFERENCES ...................................................................................................................139 8.0 RESPONSE TO COMMENTS ON THE DRAFT INITIAL STUDY/PROPOSED MITIGATED NEGATIVE DECLARATION ....................................................................................................143 9.0 MITIGATION MONITORING AND REPORTING PROGRAM............................................163 City of Hercules 1 Chelsea Wetlands Restoration Project 9/01/2016 Final Initial Study/Mitigated Negative Declaration LIST OF TABLES Table 1. Summary of Land Ownership ........................................................................................8 Table 2. Air Quality Significance Thresholds .............................................................................37 Table 3. Construction Period Emissions ....................................................................................39 Table 4. Summary of Biological Communities within the Project Area ......................................48 Table 5. Summary of Project Habitat Impacts to Sensitive Natural Communities .....................69 Table 6. Summary of Project Impacts to Wetlands and Waters of the U.S................................69 Table 7. City of Hercules General Plan Policy Consistency Analysis ......................................106 Table 8. City of Pinole General Plan Policy Consistency Analysis ..........................................109 Table 9. Construction Equipment Noise Levels at 50 feet .......................................................119 Table 10. Vibration Source Levels for Construction Equipment ..............................................122 LIST OF FIGURES Figure 1. Project Location Map ....................................................................................................6 Figure 2. Project Area and Surrounding Land Uses ....................................................................7 Figure 3. Land Ownership............................................................................................................9 Figure 4. Site Plans Legend.......................................................................................................12 Figure 4a. Project Site Plan-Overview .......................................................................................13 Figure 4b. Project Site Plan- New Sheet Pile Walls...................................................................14 Figure 4c. Project Site Plan-Culvert and Trail Turnouts.............................................................15 Figure 4d. Project Site Plan-Cross Section Details....................................................................16 Figure 4e. Force Main Plan and Profile .....................................................................................17 Figure 4f. CON-SPAN Plans......................................................................................................18 Figure 5a. Existing Site Photos..................................................................................................19 Figure 5b. Existing Site Photos..................................................................................................20 Figure 6a. Surrounding Site Photos...........................................................................................21 Figure 6b. Surrounding Site Photos...........................................................................................22 Figure 7. Project Construction Site and Nearby Sensitive Receptors........................................43 Figure 8. Potential California Red-Legged Frog Aquatic Habitat ...............................................54 Figure 9. Jurisdictional Features................................................................................................70 Figure 10. Noise Monitoring Locations ....................................................................................115 Figure 11. Sensitive Noise Receptors......................................................................................123 City of Hercules 2 Chelsea Wetlands Restoration Project 9/01/2016 Final Initial Study/Mitigated Negative Declaration LIST OF APPENDICES (Under Separate Cover) Appendix A Air Quality Data Appendix B Biological Resources Data Appendix C Cultural Resources Data Appendix