Orange County Sanitation District (Ocsd) Headworks Rehabilitation at Plant No
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ORANGE COUNTY SANITATION DISTRICT (OCSD) HEADWORKS REHABILITATION AT PLANT NO. 1 (PROJECT NO. P1-105) Draft Initial Study/Mitigated Negative Declaration Prepared for April 2019 Orange County Sanitation District ORANGE COUNTY SANITATION DISTRICT (OCSD) HEADWORKS REHABILITATION AT PLANT NO. 1 (PROJECT NO. P1-105) Draft Initial Study/Mitigated Negative Declaration Prepared for April 2019 Orange County Sanitation District 2121 Alton Parkway Suite 100 Irvine, CA 92606 949.753.7001 www.esassoc.com Bend Oakland San Francisco Camarillo Orlando Santa Monica Delray Beach Pasadena Sarasota Destin Petaluma Seattle Irvine Portland Sunrise Los Angeles Sacramento Tampa Miami San Diego 140937 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 Headworks Rehabilitation at Plant No. 1 (Project No. P1-105) Initial Study/Mitigated Negative Declaration Page Section 1, Introduction ............................................................................................................ 1 1.1 Statutory Authority and Requirements .................................................................... 1 1.2 Purpose ................................................................................................................... 2 Section 2, Project Description ................................................................................................ 3 2.1 Project Location and Setting ................................................................................... 3 2.2 Description of Project Elements .............................................................................. 6 2.3 Project Implementation ......................................................................................... 11 2.4 Operation and Maintenance.................................................................................. 13 2.5 Required Approvals .............................................................................................. 14 Section 3, Initial Study Checklist ......................................................................................... 15 3.1 Background ........................................................................................................... 15 3.2 Environmental Factors Potentially Affected .......................................................... 16 Section 4, Environmental Analysis ...................................................................................... 17 4.1 Aesthetics .............................................................................................................. 19 4.2 Agricultural and Forest Resources ....................................................................... 23 4.3 Air Quality .............................................................................................................. 25 4.4 Biological Resources ............................................................................................ 45 4.5 Cultural Resources................................................................................................ 50 4.6 Energy ................................................................................................................... 58 4.7 Geology, Soils, and Seismicity ............................................................................. 60 4.8 Greenhouse Gas Emissions ................................................................................. 65 4.9 Hazards and Hazardous Materials ....................................................................... 72 4.10 Hydrology and Water Quality ................................................................................ 77 4.11 Land Use and Land Use Planning ........................................................................ 84 4.12 Mineral Resources ................................................................................................ 86 4.13 Noise ..................................................................................................................... 87 4.14 Population and Housing ........................................................................................ 99 4.15 Public Services .................................................................................................... 101 4.16 Recreation ........................................................................................................... 103 4.17 Transportation and Traffic ................................................................................... 104 4.18 Tribal Cultural Resources ................................................................................... 109 4.19 Utilities and Service Systems ............................................................................. 113 4.20 Wildfire ................................................................................................................ 118 4.21 Mandatory Findings of Significance .................................................................... 120 Section 5, References ......................................................................................................... 122 Headworks Rehabilitation at Plant No. 1 i ESA / 140937 Project No. P1-105 April 2019 Table of Contents Page Appendices A. Air Quality and Greenhouse Gas Information B. Biological Resources Information C. Noise Information List of Figures 1 Regional Location ............................................................................................................. 4 2 Project Area ...................................................................................................................... 5 3 Demolition and Rehabilitation Plan .................................................................................. 7 4 New Facilities Plan ........................................................................................................... 8 5 Noise Measurement Locations ....................................................................................... 91 List of Tables 1 Construction Phase Duration ......................................................................................... 11 2 Construction Heavy Equipment ...................................................................................... 12 3 Ambient Air Quality Standards for Criteria Pollutants .................................................... 27 4 Air Quality Data Summary (2014 – 2016) for Project Area ............................................ 28 5 South Coast Air Basin Attainment Status ...................................................................... 30 6 SCAQMD Air Quality Significance Thresholds .............................................................. 34 7 Proposed Project: Regional Unmitigated Construction Emissions ................................ 38 8 Proposed Project: Regional Mitigated Construction Emissions ..................................... 39 9 Proposed Project Unmitigated Localized Daily Construction Emissions ....................... 41 10 Previous Cultural Resources Investigations including the Project Area ........................ 51 11 Fountain Valley Exterior Noise Standards ..................................................................... 88 12 Costa Mesa Residential Exterior Noise Standards ........................................................ 89 13 Summary of Ambient Noise Measurements .................................................................. 92 14 Construction Equipment Noise Emission Levels ........................................................... 93 15 Vibration Source Levels for Construction Equipment .................................................... 96 16 Existing and future Projected Peak Hour Traffic Volumes ........................................... 105 17 Capacity of Orange County Landfills............................................................................ 115 Headworks Rehabilitation at Plant No. 1 ii ESA / 140937 Project No. P1-105 April 2019 SECTION 1 Introduction OCSD proposes to implement the Headworks Rehabilitation and Expansion Project at Plant No. 1 (Project No. P1-105) (referred to herein as the proposed project). The headworks facilities at OCSD's Plant No. 1 include Headworks No. 1 and Headworks No. 2. Headworks No. 1 was built and modified in the 1950s and 1960s, and is currently out of service, except for influent pumping that can be used when capacity is needed for peak storm flows. Headworks No. 2 began operation in 1989 and is more than 25 years old. Due to the severe and corrosive atmosphere of the headworks processes, some structures and equipment associated with Headworks No. 2 are damaged and/or corroded. The proposed project is intended to extend the useful life of Headworks No. 2, as well as increase the influent pumping capacity of Headworks No. 2 so that Headworks No. 1 can be demolished. The proposed project would not change the existing total capacity of the headworks facilities at Plant No. 1 (i.e., 320 million gallons per day [mgd]). 1.1 Statutory