INITIAL STUDY & MITIGATED NEGATIVE DECLARATION SCH NUMBER: TBD GREENVILLE ROAD SUBDIVISION PROJECT Prepared For: COUNTY OF ALAMEDA Community Development Agency 224 West Winton Avenue Hayward, CA 94544 PREPARED BY: LAMPHIER -GREGORY 1944 EMBARCADERO OAKLAND, CA 94606 September 2011 Table of Contents Page Introduction ................................................................................................................................. 1 Purpose of Document ............................................................................................................................... 1 General Project Information ..................................................................................................................... 2 Mitigated Negative Declaration ................................................................................................................ 8 Proposed Findings .................................................................................................................................. 20 Lead Agency Determination ................................................................................................................... 21 Project Description ................................................................................................................... 23 Proposed Uses/Operations ...................................................................................................................... 23 Requested Actions and Required Approvals .......................................................................................... 27 Initial Study Checklist ............................................................................................................... 29 Aesthetics .......................................................................................................................................... 30 Agricultural and Forest Resources ......................................................................................................... 33 Air Quality .......................................................................................................................................... 36 Biological Resources .............................................................................................................................. 43 Cultural and Historic Resources ............................................................................................................. 75 Geology and Soils ................................................................................................................................... 78 Greenhouse Gas Emissions .................................................................................................................... 97 Hazards and Hazardous Materials ........................................................................................................ 109 Hydrology and Water Quality .............................................................................................................. 113 Land Use and Planning ......................................................................................................................... 125 Mineral Resources ................................................................................................................................ 128 Noise ........................................................................................................................................ 129 Population and Housing ....................................................................................................................... 135 Public Services ..................................................................................................................................... 136 Recreation ........................................................................................................................................ 138 Transportation / Traffic ........................................................................................................................ 139 Utilities and Services ............................................................................................................................ 145 Mandatory Findings .............................................................................................................................. 151 Initial Study / Mitigated Negative Declaration Page I Greenville Road Subdivision Project List of Figures Page 1. Project Site and Regional Vicinity ......................................................................................................... 3 2. Existing Land Uses: Photos 1 through 6 ................................................................................................ 5 3. Existing Land Uses: Photos 7 through 12 .............................................................................................. 6 4. Existing Land Uses: Photos 13 through 18 ............................................................................................ 7 5. Project Site Plan ................................................................................................................................... 24 6. South Livermore Valley Area Plan ...................................................................................................... 35 7. Project Site Habitats, Photos: 1 through 4 ............................................................................................ 45 8. Project Site Habitats, Photos: 5 through 7 ............................................................................................ 46 9. Project Site Habitats, Photos: 8 through 10 .......................................................................................... 47 10 Project Site Habitat Types .................................................................................................................... 48 11 Waters of the U.S. ................................................................................................................................ 51 12 Special Status Species Data .................................................................................................................. 53 13 Designated Critical Habitat Areas ........................................................................................................ 74 14 Alquist Priolo Special Studies Zones ................................................................................................... 83 15 Liquefaction and Landslide Potential ................................................................................................... 89 16 Pond Embankment Design ................................................................................................................... 92 17 Soils Map .............................................................................................................................................. 95 18 On-Site Creek Channel and Existing Culverts ................................................................................... 115 19 Proposed Creek Realignment ............................................................................................................. 121 20 Traffic Distribution ............................................................................................................................. 141 Page II Greenville Road Subdivision Project Initial Study / Mitigated Negative Declaration List of Tables 1. Potentially Significant Impacts and Mitigation Measures ...................................................................... 8 2. Earthwork Summary ............................................................................................................................. 26 3. Pond Summary ..................................................................................................................................... 27 4. BAAQMD Criteria Pollutant Thresholds of Significance .................................................................... 39 5. Daily Trip Generation ........................................................................................................................ 140 Appendices Note: Appendices are provided on a CD contained in the rear cover. A Air Quality/Greenhouse Gas URBEMIS2007, Summary Report for Annual Emissions, Tons/Year. URBEMIS2007, Summary Report for Summer Emissions, Tons/Year. B Biological Resources AES, Biological Resources Assessment, Greenville Road Property, Alameda County, August, 2008. Zander Associates, Biological Resources Assessment, Greenville Road Subdivision Project, Alameda County, March 17, 2011. AES, Wetland Delineation, Greenville Road Property, Alameda County, August, 2008. C Cultural Resources AES, Cultural Resources Assessment, Greenville Road Property, Alameda County, August, 2008. D Hazards/Risk of Upset EnviroStor Database Hazardous Sites Report. E Traffic Dowling Associates, Greenville Road Subdivision Project Traffic Memo, February 2, 2011. Initial Study / Mitigated Negative Declaration Page III Greenville Road Subdivision Project Page IV Greenville Road Subdivision Project Initial Study / Mitigated Negative Declaration INTRODUCTION PURPOSE OF DOCUMENT This document serves as the Initial Study and Mitigated Negative Declaration (IS/MND) for the proposed Greenville Road Subdivision Project (Project). Per CEQA Guidelines (Section 15070), a Mitigated Negative Declaration can be prepared to meet the requirements of CEQA review when the Initial