CITY OF HALF MOON BAY 320 C H U R C H S TREET P ROJECT INITIAL STUDY/MITIGATED NEGATIVE DECLARATION Prepared for: CITY OF HALF MOON BAY 501 MAIN STREET HALF MOON BAY, CA 94019 Prepared by: 1590 DREW AVENUE, SUITE 120 DAVIS, CA 95618 DECEMBER 2011 C I T Y O F HA L F M O ON B AY 320 C H U R C H S TREET P ROJECT INITIAL STUDY/MITIGATED NEGATIVE DECLARATION Prepared for: CITY OF HALF MOON BAY 501 MAIN STREET HALF MOON BAY, CA 94019 Prepared by: PMC 1590 DREW AVENUE, SUITE 120 DAVIS, CA 95618 DECEMBER 2011 TABLE OF CONTENTS 1.0 INTRODUCTION A. Purpose of the Initial Study/Mitigated Negative Declaration ............................................. 1.0-1 B. Technical Studies .......................................................................................................................... 1.0-1 2.0 PROJECT DESCRIPTION A. Project Location and Setting ..................................................................................................... 2.0-1 B. Project Background and History ................................................................................................ 2.0-1 C. Regulatory Requirements, Permits, and Approvals ............................................................... 2.0-9 3.0 ENVIRONMENTAL CHECKLIST A. Background ................................................................................................................................... 3.0-1 B. Environmental Factors Potentially Affected ............................................................................ 3.0-2 C. Determination ............................................................................................................................... 3.0-3 D. Evaluation of Environmental Impacts ....................................................................................... 3.0-4 4.0 ENVIRONMENTAL ANYALYSIS 1. Aesthetics ....................................................................................................................................... 4.0-1 2. Agriculture and Forest Resources .............................................................................................. 4.0-5 3. Air Quality ....................................................................................................................................... 4.0-8 4. Biological Resources .................................................................................................................. 4.0-22 5. Cultural Resources ...................................................................................................................... 4.0-49 6. Greenhouse Gas Emissions ....................................................................................................... 4.0-56 7. Geology and Soils. ...................................................................................................................... 4.0-63 8. Hazards and Hazardous Materials. ......................................................................................... 4.0-69 9. Hydrology and Water Quality. ................................................................................................. 4.0-75 10. Land Use and Planning. ............................................................................................................ 4.0-82 11. Mineral Resources. ..................................................................................................................... 4.0-84 12. Noise. ............................................................................................................................................. 4.0-85 13. Population and Housing ............................................................................................................ 4.0-91 14. Public Services ............................................................................................................................. 4.0-94 15. Recreation ................................................................................................................................... 4.0-97 16. Transportation/Traffic. ................................................................................................................ 4.0-99 17. Utilities and Service Systems. .................................................................................................. 4.0-114 18. Mandatory Findings of Significance ..................................................................................... 4.0-119 City of Half Moon Bay 320 Church Street Project December 2011 Initial Study/Mitigated Negative Declaration i TABLE OF CONTENTS 5.0 REFERENCES APPENDICES Appendix A – Air Quality Modeling Appendix B – Biological Resource Assessment Appendix C – Cultural Resources Evaluation Appendix D – Greenhouse Gas Modeling Appendix E – Geotechnical Feasibility Study Appendix F – Modified Phase One Environmental Assessment Report Appendix G – Preliminary Drainage Study Appendix H – Transportation Impact Analysis LIST OF FIGURES Figure 2.0-1 Regional Location ................................................................................................................ 2.0-3 Figure 2.0-2 Project Location.................................................................................................................... 2.0-5 Figure 2.0-3 Project Boundary and Lots ................................................................................................. 2.0-7 Figure 4.4-1 Biological Study Area......................................................................................................... 4.4-25 Figure 4.4-2 Vegetative Communities within the Biological Study Area ....................................... 4.4-27 Figure 4.4-3 Previously Recorded Occurrences of Special-Status Species within One Mile of the Biological Study Area .......................................................................................................... 4.4-31 Figure 4.4-4 Impacts to Vegetative Communities within the Biological Study Area .................. 4.4-39 Figure 4.16-1 Project Trip Distribution Patterns ................................................................................. 4.16-107 Figure 4.16-2 Existing Plus Project Traffic Volumes .......................................................................... 4.16-109 Figure 4.16-3 Cumulative Plus Project Traffic Volumes .................................................................. 4.16-111 LIST OF TABLES Table 2.0-1 Proposed Lot Use and Development Potential ............................................................... 2.0-1 Table 4.3-1 BAAQMD Air Quality Standards and Attainment Status ................................................ 4.3-9 Table 4.3-2 Criteria Air Pollutants Summary of Common Sources and Effects ............................. 4.3-11 Table 4.3-3 Project Construction Emissions (Maximum) Pounds per Day ...................................... 4.3-15 Table 4.3-4 Estimated Operational Emissions (Maximum) Pounds per Day .................................. 4.3-17 320 Church Street Project City of Half Moon Bay Initial Study/Mitigated Negative Declaration December 2011 ii TABLE OF CONTENTS Table 4.4-1 Vegetative Communities Within the BSA ....................................................................... 4.4-23 Table 4.4-2 Habitat Types Within the BSA and Special-Status Species Associated with Those Habitat Types ........................................................................................................................ 4.4-33 Table 4.6-1 Global Warming Potential for Greenhouse Gases ....................................................... 4.6-58 Table 4.6-2 Estimated Construction-Related Greenhouse Gas Emissions (Pounds per Day) .... 4.6-60 Table 4.6-3 Construction-Related Greenhouse Gas Emissions (Metric Tons per Year) .............. 4.6-60 Table 4.6-4 Operational Greenhouse Gas Emissions from Vehicles (Metric Tons Per Year) ..... 4.6-62 Table 4.12-1 Typical Construction Equipment Noise Levels ........................................................... 4.12-87 Table 4.12-2 Typical Construction-Equipment Vibration Levels .................................................... 4.12-89 Table 4.13-1 Historical Population Change City of Half Moon Bay 2000–2011........................... 4.13-91 Table 4.13-2 City of Half Moon Bay 2011 Housing Units .................................................................. 4.13-92 Table 4.14-1 CUSD Enrollment .............................................................................................................. 4.14-95 Table 4.15-1 City of Half Moon Bay Developed Park Acreage ................................................... 4.15-97 Table 4.16-1 Existing Intersection Levels of Service ........................................................................ 4.16-101 Table 4.16-2 Project Trip Generation Estimates .............................................................................. 4.16-104 Table 4.16-3 Intersection Levels of Service ...................................................................................... 4.16-105 Table 4.17-1 Disposal Facilities Used by Half Moon Bay and Their Capacities ......................... 4.17-116 City of Half Moon Bay 320 Church Street Project December 2011 Initial Study/Mitigated Negative Declaration iii 1.0 INTRODUCTION 1.0 INTRODUCTION A. PURPOSE OF THE INITIAL STUDY/MITIGATED NEGATIVE DECLARATION This document is an Initial Study (IS) and Mitigated Negative Declaration (MND) prepared pursuant to the California Environmental Quality Act (CEQA), for the 320 Church Street