Mammoth Disposal Transfer Station Expansion Project Initial Study/Mitigated Negative Declaration Public Review Draft | May 2021 Submitted to: Town of Mammoth Lakes Submitted by: This document is designed for double-sided printing to conserve natural resources. PUBLIC REVIEW DRAFT INITIAL STUDY/MITIGATED NEGATIVE DECLARATION Mammoth Disposal Transfer Station Expansion Project Lead Agency: TOWN OF MAMMOTH LAKES 437 Old Mammoth Road, Suite 230 Mammoth Lakes, California 93546 Contact: Ms. Sandra Moberly Community and Economic Development Director 760.965.3633 [email protected] Prepared by: MICHAEL BAKER INTERNATIONAL 5 Hutton Centre Drive, Suite 500 Santa Ana, California 92707 Contact: Ms. Kristen Bogue 949.472.3505 May 2021 JN 181877 This document is designed for double-sided printing to conserve natural resources. Mammoth Disposal Transfer Station Expansion Project Initial Study/Mitigated Negative Declaration TABLE OF CONTENTS 1.0 Introduction ................................................................................................................................................. 1-1 1.1 Statutory Authority and Requirements ............................................................................................ 1-1 1.2 Purpose .......................................................................................................................................... 1-2 1.3 Consultation ................................................................................................................................... 1-2 1.4 Incorporation by Reference ............................................................................................................ 1-2 2.0 Project Description ..................................................................................................................................... 2-1 2.1 Project Location .............................................................................................................................. 2-1 2.2 Environmental Setting .................................................................................................................... 2-1 2.3 Existing General Plan and Zoning .................................................................................................. 2-6 2.4 Project Background ........................................................................................................................ 2-6 2.5 Project Characteristics .................................................................................................................... 2-7 2.6 Permits and Approvals ................................................................................................................. 2-16 3.0 Initial Study Checklist ................................................................................................................................ 3-1 3.1 Project Description and Background .............................................................................................. 3-1 3.2 Environmental Factors Potentially Affected .................................................................................... 3-2 3.3 Evaluation of Environmental Impacts ............................................................................................. 3-2 3.4 Determination ................................................................................................................................. 3-4 4.0 Environmental Evaluation ....................................................................................................................... 4.1-1 4.1 Aesthetics .................................................................................................................................... 4.1-1 4.2 Agriculture and Forestry Resources ............................................................................................ 4.2-1 4.3 Air Quality .................................................................................................................................... 4.3-1 4.4 Biological Resources ................................................................................................................... 4.4-1 4.5 Cultural Resources ...................................................................................................................... 4.5-1 4.6 Energy ......................................................................................................................................... 4.6-1 4.7 Geology and Soils ....................................................................................................................... 4.7-1 4.8 Greenhouse Gas Emissions ........................................................................................................ 4.8-1 4.9 Hazards and Hazardous Materials .............................................................................................. 4.9-1 4.10 Hydrology and Water Quality ..................................................................................................... 4.10-1 4.11 Land Use and Planning ............................................................................................................. 4.11-1 4.12 Mineral Resources ..................................................................................................................... 4.12-1 4.13 Noise ......................................................................................................................................... 4.13-1 4.14 Population and Housing ............................................................................................................ 4.14-1 4.15 Public Services .......................................................................................................................... 4.15-1 4.16 Recreation ................................................................................................................................. 4.16-1 4.17 Transportation/Traffic ................................................................................................................ 4.17-1 4.18 Tribal Cultural Resources .......................................................................................................... 4.18-1 4.19 Utilities and Service Systems .................................................................................................... 4.19-1 4.20 Wildfire ...................................................................................................................................... 4.20-1 4.21 Mandatory Findings of Significance ........................................................................................... 4.21-1 Public Review Draft | May 2021 i Table of Contents Mammoth Disposal Transfer Station Expansion Project Initial Study/Mitigated Negative Declaration 5.0 Preparers and Contributors ...................................................................................................................... 5-1 6.0 References ................................................................................................................................................. 6-1 Technical Appendices Appendix A Air Quality/Greenhouse Gas/Energy Data Appendix B Cultural Resources Report Appendix C Geotechnical Report Appendix D Hydrologic Analysis and Data Appendix E Noise Data Appendix F Transportation Analysis Public Review Draft | May 2021 ii Table of Contents Mammoth Disposal Transfer Station Expansion Project Initial Study/Mitigated Negative Declaration LIST OF EXHIBITS Exhibit 2-1 Regional Vicinity ............................................................................................................................. 2-2 Exhibit 2-2 Site Vicinity ..................................................................................................................................... 2-3 Exhibit 2-3 Transfer Station Facility Existing Conditions .................................................................................. 2-5 Exhibit 2-4 Transfer Station Facility Conceptual Site Plan ............................................................................... 2-8 Exhibit 2-5 Transfer Station Building Elevations ............................................................................................... 2-9 Exhibit 2-6 Recycling Center Conceptual Site Plan ........................................................................................ 2-14 Exhibit 4.1-1 Site Lighting Plan......................................................................................................................... 4.1-8 Public Review Draft | May 2021 iii Table of Contents Mammoth Disposal Transfer Station Expansion Project Initial Study/Mitigated Negative Declaration LIST OF TABLES Table 2-1 Surrounding Land Uses .................................................................................................................. 2-1 Table 4.1-1 Municipal Code Development Standards Governing Scenic Quality Consistency Analysis ........ 4.1-3 Table 4.1-2 General Plan Policies Governing Scenic Quality Consistency Analysis ...................................... 4.1-5 Table 4.3-1 Regional Thresholds of Significance ........................................................................................... 4.3-3 Table 4.3-2 Maximum Daily Construction Emissions...................................................................................... 4.3-4 Table 4.3-3 Existing Operational Air Emissions .............................................................................................