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Draft Initial Study / Mitigated Negative Declaration Jenny Lind Water Treatment Plant Pretreatment Improvements Project (Ccwd Cip #11092 / Dr-4240-Ca Pj#0001)

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Draft Initial Study / Mitigated Negative Declaration Jenny Lind Water Treatment Plant Pretreatment Improvements Project (Ccwd Cip #11092 / Dr-4240-Ca Pj#0001) DRAFT INITIAL STUDY / MITIGATED NEGATIVE DECLARATION JENNY LIND WATER TREATMENT PLANT PRETREATMENT IMPROVEMENTS PROJECT (CCWD CIP #11092 / DR-4240-CA PJ#0001) Prepared by Prepared for CALAVERAS COUNTY WATER DISTRICT 120 Toma Court 853 Lincoln Way P.O. Box 846 Suite 105 San Andreas, California 95249 Auburn, California 95603 209.754.3174 Contact: Markus Lang Contact: Charles Palmer, District Engineer DRAFT INITIAL STUDY/MITIGATED NEGATIVE DECLARATION JENNY LIND WATER TREATMENT PLANT PRETREATMENT IMPROVEMENTS PROJECT (CCWD CIP #11092/DR-4240-CA PJ#0001) Prepared for: Calaveras County Water District 120 Toma Court P.O. Box 846 San Andreas, California 95249 209.754.3174 Contact: Charles Palmer, District Engineer Prepared by: 853 Lincoln Way, Suite 105 Auburn, California 95603 Contact: Markus Lang JANUARY 2018 Printed on 30% post-consumer recycled material. Draft Initial Study/Mitigated Negative Declaration Jenny Lind Water Treatment Plant Improvements Project TABLE OF CONTENTS Section Page No. ACRONYMS AND ABBREVIATIONS ................................................................................... III 1 INTRODUCTION..............................................................................................................1 1.1 Project Overview .................................................................................................... 1 1.2 California Environmental Quality Act Compliance ............................................... 1 1.3 National Environmental Policy Act ........................................................................ 2 1.4 Project Location ...................................................................................................... 5 1.5 Environmental Setting ............................................................................................ 5 2 SUMMARY OF FINDINGS .............................................................................................7 2.1 Environmental Factors Potentially Affected ........................................................... 9 2.2 Environmental Determination ................................................................................. 9 3 INITIAL STUDY CHECKLIST ....................................................................................13 3.1 Aesthetics .............................................................................................................. 28 3.2 Agriculture and Forestry Resources...................................................................... 30 3.3 Air Quality ............................................................................................................ 31 3.4 Biological Resources ............................................................................................ 36 3.5 Cultural Resources ................................................................................................ 40 3.6 Geology and Soils ................................................................................................. 43 3.7 Greenhouse Gas Emissions ................................................................................... 46 3.8 Hazards and Hazardous Materials ........................................................................ 49 3.9 Hydrology and Water Quality ............................................................................... 53 3.10 Land Use and Planning ......................................................................................... 56 3.11 Mineral Resources ................................................................................................ 56 3.12 Noise ..................................................................................................................... 57 3.13 Population and Housing ........................................................................................ 60 3.14 Public Services ...................................................................................................... 60 3.15 Recreation ............................................................................................................. 61 3.16 Transportation and Traffic .................................................................................... 62 3.17 Tribal Cultural Resources ..................................................................................... 64 3.18 Utilities and Service Systems................................................................................ 66 3.19 Mandatory Findings of Significance ..................................................................... 68 4 REFERENCES AND PREPARERS ..............................................................................71 4.1 References Cited ................................................................................................... 71 4.2 List of Preparers .................................................................................................... 72 9853 i January 2018 Draft Initial Study/Mitigated Negative Declaration Jenny Lind Water Treatment Plant Improvements Project TABLE OF CONTENTS (CONTINUED) Page No. APPENDICES A Site Plan B Air Quality Modeling Results C Biological Resources Assessment D Confidential Cultural Resources Report E Draft Jenny Lind Mitigation Monitoring Program FIGURES 1 Regional Vicinity .................................................................................................................3 2 Project Location ...................................................................................................................7 3 Area of Potential Effects ....................................................................................................14 TABLES 1 Mitigation Measures ............................................................................................................9 2 CCAPCD Air Quality Significance Thresholds ................................................................32 3 Estimated Maximum Daily Construction Emissions .........................................................33 3.7-1 Estimated Annual Construction GHG Emissions ..............................................................47 9853 ii January 2018 Draft Initial Study/Mitigated Negative Declaration Jenny Lind Water Treatment Plant Improvements Project ACRONYMS AND ABBREVIATIONS Acronym/Abbreviation Definition AB Assembly Bill ADI Area of Direct Impact APE Area of Potential Effect APN Assessor’s Parcel Number CAAQS California Ambient Air Quality Standards CARB California Air Resources Board CCR California Code of Regulations CCWD Calaveras County Water District CEQ Council on Environmental Quality CEQA California Environmental Quality Act CH4 methane CNDDB California Natural Diversity Database CO carbon monoxide CO2 carbon dioxide CO2E carbon dioxide equivalent CRHR California Register of Historical Resources dBA A-weighted decibel EIR Environmental Impact Report EPA Environmental Protection Agency FEMA Federal Emergency Management Agency GHG Greenhouse Gas IS Initial Study MND Mitigated Negative Declaration MT metric tons NAAQS National Ambient Air Quality Standards NAHC Native American Heritage Commission ND Negative Declaration NPDES National Pollutant Discharge Elimination System NRHP National Register of Historic Places O3 ozone PM10 course particulate matter PM2.5 fine particulate matter SB Senate Bill SR State Route SWRCB State Water Resources Control Board USFWS U.S. Fish and Wildlife Service 9853 iii January 2018 Draft Initial Study/Mitigated Negative Declaration Jenny Lind Water Treatment Plant Improvements Project INTENTIONALLY LEFT BLANK 9853 iv January 2018 Draft Initial Study/Mitigated Negative Declaration Jenny Lind Water Treatment Plant Improvements Project 1 INTRODUCTION 1.1 Project Overview The Calaveras County Water District (District) owns and operates the Jenny Lind Water Treatment Plant (Jenny Lind Plant) near Valley Springs, California (Figure 1, Regional Vicinity). The plant has a capacity of 6.0 million gallons a day (MGD) and serves approximately 11,250 customers. Raw water supplied from New Hogan reservoir and downstream of the dam is withdrawn through an infiltration gallery in the riverbed. The existing water plant processes include raw water pumps, ozone/ozonation, absorption clarifiers, gravity filters, and disinfection with sodium hypochlorite. Recently, a 70,868-acre wildfire (Butte Fire) occurred in Calaveras and Amador counties, and approximately 50% of the burned area is in the watershed for New Hogan reservoir and upstream of the treatment plant. Due to the local soil conditions, runoff from the burned area will have a major impact on raw water quality and the District’s ability to produce drinking water. To address impacts to water quality, the District proposes to upgrade the Jenny Lind plant with a packaged pretreatment system (plant), which consists of pre-engineered/pre-manufactured treatment units that will be fabricated off-site and shipped to the project site for final installation (proposed project). The District submitted an application and obtained funding through the California Office of Emergency Services (Cal-OES) and Federal Emergency Management Agency (FEMA) Hazard Mitigation Grant Program for the proposed project. As such, the proposed project requires environmental review under the California Environmental Quality Act (CEQA) and National Environmental Policy Act (NEPA) to determine whether the proposed project may have significant adverse effects on the environment. This document encompasses a CEQA Initial Study/Negative Declaration (IS/ND);
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