MEMORIAL PARK WASTEWATER TREATMENT FACILITIES IMPROVEMENT PROJECT Initial Study / Mitigated Negative Declaration
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MEMORIAL PARK WASTEWATER TREATMENT FACILITIES IMPROVEMENT PROJECT Initial Study / Mitigated Negative Declaration Prepared for March 2019 San Mateo County Parks Department and San Mateo County Department of Public Works MEMORIAL PARK WASTEWATER TREATMENT FACILITIES IMPROVEMENT PROJECT Initial Study / Mitigated Negative Declaration Prepared for March 2019 San Mateo County Parks Department and San Mateo County Department of Public Works 550 Kearny Street Suite 800 San Francisco, CA 94108 415.896.5900 esassoc.com Bend Oakland San Diego Camarillo Orlando San Francisco Delray Beach Pasadena Santa Monica Destin Petaluma Sarasota Irvine Portland Seattle Los Angeles Sacramento Tampa D160790 OUR COMMITMENT TO SUSTAINABILITY | ESA helps a variety of public and private sector clients plan and prepare for climate change and emerging regulations that limit GHG emissions. ESA is a registered assessor with the California Climate Action Registry, a Climate Leader, and founding reporter for the Climate Registry. ESA is also a corporate member of the U.S. Green Building Council and the Business Council on Climate Change (BC3). Internally, ESA has adopted a Sustainability Vision and Policy Statement and a plan to reduce waste and energy within our operations. This document was produced using recycled paper. TABLE OF CONTENTS Memorial Park Wastewater Treatment Facilities Improvement Project Initial Study / Mitigated Negative Declaration Page Section 1, Project Description .......................................................................................... 1-1 1.1 Introduction ........................................................................................................... 1-1 1.2 Project Background .............................................................................................. 1-2 1.3 Project Objectives ................................................................................................. 1-4 1.4 Proposed Project .................................................................................................. 1-4 1.5 Report Organization ............................................................................................ 1-27 1.6 Other Approvals .................................................................................................. 1-28 1.7 References ......................................................................................................... 1-28 Section 2, Environmental Checklist ................................................................................. 2-1 Environmental Factors Potentially Affected ................................................................... 2-2 Evaluation of Environmental Impacts ............................................................................. 2-3 2.1 Aesthetics ............................................................................................................. 2-5 2.2 Agricultural and Forest Resources ...................................................................... 2-13 2.3 Air Quality ........................................................................................................... 2-16 2.4 Biological Resources .......................................................................................... 2-23 2.5 Cultural Resources ............................................................................................. 2-45 2.6 Geology and Soils ............................................................................................... 2-50 2.7 Climate Change .................................................................................................. 2-56 2.8 Hazards and Hazardous Materials ...................................................................... 2-60 2.9 Hydrology and Water Quality .............................................................................. 2-67 2.10 Land Use and Planning ...................................................................................... 2-73 2.11 Mineral Resources .............................................................................................. 2-75 2.12 Noise .................................................................................................................. 2-76 2.13 Population and Housing ...................................................................................... 2-80 2.14 Public Services ................................................................................................... 2-81 2.15 Recreation .......................................................................................................... 2-83 2.16 Transportation/Traffic .......................................................................................... 2-84 2.17 Utilities and Service Systems .............................................................................. 2-92 2.18 Mandatory Findings of Significance .................................................................... 2-96 Section 3, Summary of Mitigation Measures ................................................................... 3-1 Section 4, Report Preparers .............................................................................................. 4-1 4.1 Lead Agency ......................................................................................................... 4-1 4.2 Consultants ........................................................................................................... 4-1 Memorial Park WWT Infrastructure Replacement Project i ESA / 160790 Initial Study/Mitigated Negative Declaration March 2019 Table of Contents Page Appendices A. Project-Related Construction Emissions ........................................................................A-1 B. Special-Status Species Considered ...............................................................................B-1 List of Figures 1. Project Location and Facilities ....................................................................................... 1-3 2. Existing WWTP and Collections System ........................................................................ 1-6 3. Proposed Project Index Map .......................................................................................... 1-9 3a. Project Components and Work Limits .......................................................................... 1-10 3b. Project Components and Work Limits .......................................................................... 1-11 3c. Project Components and Work Limits .......................................................................... 1-12 3d. Project Components and Work Limits .......................................................................... 1-13 3e. Project Components and Work Limits .......................................................................... 1-14 3f. Project Components and Work Limits .......................................................................... 1-15 4. Phase 1 Project: Site Plan ........................................................................................... 1-16 5. Phase 2b Collection System Replacement for High and Medium Priority Only ........... 1-21 6a. Photos of Memorial Park ................................................................................................ 2-6 6b. Photos of Memorial Park (cont.) ..................................................................................... 2-7 6c. Photos of Memorial Park (cont.) ..................................................................................... 2-8 List of Tables 1. Summary of Pipeline Improvements ............................................................................ 1-18 2. Summary of Future Manhole Improvements ................................................................ 1-20 3. Summary of Construction Assumptions for the Proposed Project ................................ 1-23 4. Average Daily Construction-related Pollutant Emissions (pounds/day) ....................... 2-18 5. Reference Construction Equipment Noise Levels – (50 feet from source) ................... 2-78 6. Estimated Maximum Daily Vehicle Trips for Project Construction ................................ 2-85 Memorial Park WWT Infrastructure Replacement Project ii ESA / 160790 Initial Study/Mitigated Negative Declaration March 2019 SECTION 1 Project Description 1.1 Introduction The San Mateo County Parks Department and the Department of Public Works (hereafter referred to generally as the County) propose to implement the Memorial Park Wastewater Treatment Facilities Improvement Project within unincorporated San Mateo County, California. The proposed project includes improvements to the existing wastewater treatment system (treatment system), including replacement of the existing wastewater treatment plant (WWTP), repairs and replacement of pipes and manholes, and other necessary upgrades to the treatment system. Activities are proposed to occur primarily within the limits of Memorial Park, which is near the community of Loma Mar, in unincorporated San Mateo County, California. This document is an Initial Study/Mitigated Negative Declaration (IS/MND) that analyzes the potential environmental impacts of project implementation, including those resulting from construction and operation of the proposed treatment system improvements. This IS/MND has been prepared in compliance with Public Resources Code Section 21000 et seq., California Environmental Quality Act (CEQA) of 1970 (as amended), and Title 14, Chapter 3 of the California Administrative Code. In accordance