FINAL ENVIRONMENTAL ASSESSMENT LYTTON RESIDENTIAL DEVELOPMENT VOLUME II MAY 2011 Lead Agency: U.S. Department of the Interior Bureau of Indian Affairs Pacific Region Office 2800 Cottage Way, Room W-2820 Sacramento, CA 95825-1846 FINAL ENVIRONMENTAL ASSESSMENT LYTTON RESIDENTIAL DEVELOPMENT VOLUME II MAY 2011 Lead Agency: U.S. Department of the Interior Bureau of Indian Affairs Pacific Region Office 2800 Cottage Way, Room W-2820 Sacramento, CA 95825-1846 Prepared By: Analytical Environmental Services 1801 7th Street, Suite 100 Sacramento, CA 95811 (916) 447-3479 www.analyticalcorp.com TABLE OF CONTENTS LYTTON RESIDENTIAL DEVELOPMENT – VOLUME II FINAL ENVIRONMENTAL ASSESSMENT REVISED EA Executive Summary ................................................................................................................................ ES-1 1.0 INTRODUCTION 1.1 Introduction ...................................................................................................................... 1-1 1.2 Location and Setting ........................................................................................................ 1-1 1.3 Purpose and Need for the Proposed Action ..................................................................... 1-6 1.4 Overview of the Environmental Process .......................................................................... 1-7 1.5 Environmental Issues Addressed ..................................................................................... 1-7 1.6 Regulatory Requirements and Approvals ........................................................................ 1-8 2.0 PROPOSED PROJECT AND ALTERNATIVES 2.1 Alternative A – Proposed Project .................................................................................... 2-1 2.2 Alternative B – Onsite Water and Wastewater .............................................................. 2-10 2.3 Alternative C – Reduced Intensity with Onsite Water and Wastewater ........................ 2-14 2.4 Alternative D – No Action Alternative .......................................................................... 2-17 2.5 Comparision of the Proposed Project and Alternatives ................................................. 2-17 3.0 DESCRIPTION OF AFFECTED ENVIRONMENT 3.1 Land Resources ................................................................................................................ 3-1 3.2 Water Resources .............................................................................................................. 3-8 3.3 Air Quality ..................................................................................................................... 3-15 3.4 Biological Resources ..................................................................................................... 3-24 3.5 Cultural Resources ......................................................................................................... 3-49 3.6 Socioeconomic Conditions / Environmental Justice ...................................................... 3-59 3.7 Transportation and Circulation ...................................................................................... 3-63 3.8 Land Use ........................................................................................................................ 3-66 3.9 Public Services ............................................................................................................... 3-74 3.10 Noise .............................................................................................................................. 3-79 3.11 Hazardous Materials ...................................................................................................... 3-82 3.12 Visual Resources ............................................................................................................ 3-85 4.0 ENVIRONMENTAL CONSEQUENCES 4.1 Alternative A – Proposed Project .................................................................................... 4-1 4.2 Alternative B – Onsite Water and Wastewater .............................................................. 4-27 4.3 Alternative C – Reduced Intensity with Onsite Water and Wastewater ........................ 4-42 4.4 Alternative D – No Action Alternative .......................................................................... 4-53 4.5 Cumulative Effects ........................................................................................................ 4-55 4.6 Indirect and Growth-Inducing Effects ........................................................................... 4-63 Analytical Environmental Services i Lytton Property Residential Development May 2011 Final Environmental Assessment 5.0 MITIGATION MEASURES 5.1 Land Resources ................................................................................................................ 5-1 5.2 Water Resources .............................................................................................................. 5-2 5.3 Air Quality ....................................................................................................................... 5-3 5.4 Biological Resources ....................................................................................................... 5-6 5.5 Cultural Resources ......................................................................................................... 5-10 5.6 Socioeconomic Conditions / Environmental Justice ...................................................... 5-11 5.7 Transportation and Circulation ...................................................................................... 5-11 5.8 Land Use ........................................................................................................................ 5-11 5.9 Public Services ............................................................................................................... 5-12 5.10 Noise .............................................................................................................................. 5-13 5.11 Hazardous Materials ...................................................................................................... 5-13 5.12 Visual Resources ............................................................................................................ 5-14 6.0 CONSULTATION, COORDINATION AND LIST OF PREPARERS 6.1 Federal Agencies Consulted ............................................................................................ 6-1 6.2 State Agencies Consulted ................................................................................................ 6-1 6.3 Tribes Consulted .............................................................................................................. 6-1 6.4 Local Agencies Consulted ............................................................................................... 6-2 6.5 Preparers of Environmental Assessment ......................................................................... 6-2 7.0 BIBLIOGRAPHY ............................................................................................................................ 7-1 LIST OF TABLES ES-1 Summary of Potential Impacts, Mitigation Measures and Signficance ...................... ES-11 1-1 Assessor’s Parcel Numbers within the Project Site (New Table) .................................... 1-5 2-1 Summary of Development Alternatives ........................................................................... 2-2 2-2 Tribal Community Development – Onsite Facilities ...................................................... 2-5 3-1 Project Site Soils (Revised) ............................................................................................. 3-2 3-2 Water Quality Objectives of Inland Surface Waters ...................................................... 3-12 3-3 Water Quality Objectives for the Russian River (Revised) ........................................... 3-13 3-4 Mark West Creek Flow Data (Revised) ......................................................................... 3-14 3-5 National Ambient Air Quality Standards (Revised) ...................................................... 3-22 3-6 Exceedances of NAAQS in the SFBAAB (Revised) ..................................................... 3-23 3-7 Summary of Habitat Types Within the Project Site (Revised) ...................................... 3-35 3-8 Summary of Arbor Survey Results (Revised)................................................................ 3-41 3-9 Federal Special Status Species with Potential to Occur in Project Site (New Table) .... 3-42 3-10 Regionally Occurring Non-Federal Special Status Species (Revised) .......................... 3-42 3-11 Sonoma County Population 2000-2008 ......................................................................... 3-60 3-12 Lytton Rancheria Population and Labor Force Estimates ............................................. 3-60 3-13 Level of Service for Signalized Intersection .................................................................. 3-64 3-14 Level of Service for Unsignalized Intersections ............................................................ 3-64 3-15 Existing Level of Service and Average Delay of Study Intersections (Revised)........... 3-65 3-16 Public Schools ................................................................................................................ 3-78 3-17 Noise Level Performance Standards .............................................................................