Sonoma Valley High School Athletic Fields Renovation Project Draft Environmental Impact Report State Clearinghouse Number: 2019012028 October 11, 2019 Sonoma Valley High School Athletic Fields Renovation Project Draft Environmental Impact Report State Clearinghouse Number: 2019012028 Prepared for: Sonoma Valley Unified School District 17850 Railroad Avenue Sonoma, CA 95476 Prepared by: 2235 Mercury Way, Suite 150 Santa Rosa, CA 95407 (707) 523-1010 October 2019 SVUSD | Sonoma Valley High School Athletic Fields Renovation Project Draft EIR Table of Contents Table of Contents 1. Introduction ............................................................................................................................... 1-1 1.1 California Environmental Quality Act .............................................................................. 1-1 1.2 Background ..................................................................................................................... 1-2 Project Need .................................................................................................. 1-2 Facilities Master Plan .................................................................................... 1-2 Interagency and Public Coordination ............................................................ 1-3 1.3 Public Involvement and Scoping Process ...................................................................... 1-3 Notice of Preparation ..................................................................................... 1-3 Areas of Controversy and Key Environmental Issues ................................... 1-3 1.4 Availability of Draft EIR and Public Comment Period ..................................................... 1-4 1.5 Summary of Impacts and Mitigation Measures .............................................................. 1-5 2. Project Description .................................................................................................................... 2-1 2.1 Project Location .............................................................................................................. 2-1 2.2 Project Objectives ........................................................................................................... 2-1 2.3 Existing Conditions ......................................................................................................... 2-2 Sonoma Valley High School Campus ........................................................... 2-2 Athletic Fields Renovation Area .................................................................... 2-2 Existing Athletic and Special Events (on and off campus) ............................ 2-3 Campus Parking and Overflow Parking ........................................................ 2-6 2.4 Project Components ....................................................................................................... 2-6 Renovated Track & Field ............................................................................... 2-6 Softball and Baseball Fields .......................................................................... 2-8 Basketball Courts .......................................................................................... 2-8 Pedestrian and Emergency Access .............................................................. 2-8 Stormwater Treatment and Detention ........................................................... 2-9 Landscaping .................................................................................................. 2-9 Utilities ......................................................................................................... 2-10 2.5 Construction Activities .................................................................................................. 2-10 Construction Schedule ................................................................................ 2-10 Demolition and Grading............................................................................... 2-11 Dewatering .................................................................................................. 2-11 Tree Removal .............................................................................................. 2-11 Site Access and Staging ............................................................................. 2-11 Construction Equipment and Haul Trips ..................................................... 2-12 2.6 Operation and Maintenance ......................................................................................... 2-12 Athletic and Special Field Events ................................................................ 2-12 Lighting ........................................................................................................ 2-13 Public Address System ............................................................................... 2-13 Access and Parking Management .............................................................. 2-16 Turf Maintenance and Replacement ........................................................... 2-16 2.7 Energy Use ................................................................................................................... 2-17 2.8 Project Minimization and Avoidance Measures ............................................................ 2-17 Project Design Feature 1: Air Quality Ctl Measures during Construction ... 2-17 SVUSD | Sonoma Valley High School Athletic Fields Renovation Project Draft EIR | Page TOC i Table of Contents Project Design Feature 2: Stormwater Pollution Prevention Plan (SWPPP)2-18 Project Design Feature 3: Construction Noise Reduction Actions .............. 2-18 Project Design Feature 4: Implement Recommendations from Geotechnical Report .......................................................................................................... 2-19 2.9 Agency Approvals ......................................................................................................... 2-19 3. Environmental Analysis ............................................................................................................. 3-1 Scope of Analysis ..................................................................................................................... 3-1 Significance Determinations ..................................................................................................... 3-2 Cumulative Scenario ................................................................................................................. 3-2 Approach to Cumulative Impact Analysis....................................................................... 3-2 3.1 Aesthetics .................................................................................................................... 3.1-1 Existing Setting ........................................................................................... 3.1-1 Regulatory Framework ............................................................................... 3.1-2 Evaluation Criteria and Significance Thresholds ....................................... 3.1-4 Approach to Analysis .................................................................................. 3.1-4 Impacts and Mitigation Measures .............................................................. 3.1-5 Cumulative Impacts .................................................................................. 3.1-11 3.2 Air Quality .................................................................................................................... 3.2-1 Existing Setting ........................................................................................... 3.2-1 Regulatory Framework ............................................................................... 3.2-4 Evaluation Criteria and Significance Thresholds ....................................... 3.2-7 Approach to Analysis .................................................................................. 3.2-8 Impacts and Mitigation Measures .............................................................. 3.2-8 Cumulative Impacts .................................................................................. 3.2-13 3.3 Biological Resources ................................................................................................... 3.3-1 Existing Setting ........................................................................................... 3.3-1 Regulatory Framework ............................................................................... 3.3-5 Evaluation Criteria and Significance Thresholds ....................................... 3.3-9 Approach to Analysis ................................................................................ 3.3-11 Impacts and Mitigation Measures ............................................................ 3.3-12 Cumulative Impacts .................................................................................. 3.3-21 3.4 Cultural and Tribal Cultural Resources........................................................................ 3.4-1 Existing Setting ........................................................................................... 3.4-1 Regulatory Framework ............................................................................... 3.4-6 Evaluation Criteria and Thresholds of Significance ................................. 3.4-10 Approach to Analysis ................................................................................ 3.4-10 Impacts and Mitigation Measures