PUBLIC REVIEW DRAFT INITIAL STUDY/ MITIGATED NEGATIVE DECLARATION YORBA LINDA BOULEVARD WIDENING IMPROVEMENTS PROJECT September 2020 This page intentionally left blank PUBLIC REVIEW DRAFT INITIAL STUDY/ MITIGATED NEGATIVE DECLARATION YORBA LINDA BOULEVARD WIDENING IMPROVEMENTS PROJECT Prepared for: City of Yorba Linda Public Works Department 4845 Casa Loma Avenue Yorba Linda, California 92886 Contact: Tony Wang, Traffic Engineering Manager (714) 961-7170 Under contract to: HNTB Corporation Patrick Somerville, P.E. 200 East Sandpointe Avenue, Suite 200 Santa Ana, California 92707 (714) 460-1600 Prepared by: LSA 20 Executive Park, Suite 200 Irvine, California 92614 (949) 553-0666 September 2020 This page intentionally left blank . I NITIAL S TUDY/MITIGATED N EGATIVE D ECLARATION Y ORBA L INDA B OULEVARD W IDENING I MPROVEMENTS P ROJECT S EPTEMBER 2020 Y ORBA L INDA, C ALIFORNIA TABLE OF CONTENTS 1.0 INTRODUCTION ................................................................................................ 1-1 1.1 Purpose of the Initial Study/Mitigated Negative Declaration ........................................... 1-1 1.2 Summary of Findings ......................................................................................................... 1-1 1.3 Project Approval ................................................................................................................ 1-2 2.0 PROJECT SETTING AND DESCRIPTION ............................................................... 2-1 2.1 Project Location ................................................................................................................ 2-1 2.2 Environmental Setting ....................................................................................................... 2-1 2.3 Project Characteristics ...................................................................................................... 2-5 2.4 Other Improvements ....................................................................................................... 2-18 2.5 Maximum Disturbance Limits ......................................................................................... 2-18 2.6 Right-of-Way Acquisitions ............................................................................................... 2-19 2.7 Construction Activities and Access ................................................................................. 2-19 2.8 Project Schedule .............................................................................................................. 2-19 2.9 Agreements, Permits, and Approvals .............................................................................. 2-20 3.0 ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED ........................................ 3-1 3.1 Determination ................................................................................................................... 3-1 4.0 EVALUATION OF ENVIRONMENTAL IMPACTS ................................................... 4-1 4.1 Aesthetics .......................................................................................................................... 4-3 4.2 Agriculture and Forestry Resources .................................................................................. 4-6 4.3 Air Quality ......................................................................................................................... 4-9 4.4 Biological Resources ........................................................................................................ 4-18 4.5 Cultural Resources .......................................................................................................... 4-64 4.6 Energy .............................................................................................................................. 4-68 4.7 Geology and Soils ............................................................................................................ 4-70 4.8 Greenhouse Gas Emissions ............................................................................................. 4-78 4.9 Hazards and Hazardous Materials................................................................................... 4-83 4.10 Hydrology and Water Quality ......................................................................................... 4-91 4.11 Land Use and Planning .................................................................................................. 4-103 4.12 Mineral Resources ......................................................................................................... 4-106 4.13 Noise.............................................................................................................................. 4-108 4.14 Population and Housing ................................................................................................ 4-126 4.15 Public Services ............................................................................................................... 4-128 4.16 Recreation ..................................................................................................................... 4-131 4.17 Transportation .............................................................................................................. 4-133 4.18 Tribal Cultural Resources .............................................................................................. 4-138 4.19 Utilities and Service Systems ......................................................................................... 4-140 4.20 Wildfire .......................................................................................................................... 4-145 4.21 Mandatory Findings of Significance .............................................................................. 4-148 5.0 REFERENCES ..................................................................................................... 5-1 P:\HNT1901.02 - Yorba Linda\Draft ISMND\Draft ISMND_Yorba Linda Blvd Widening Improvements Project_9.18.20.docx «09/18/20» i Y ORBA L INDA B OULEVARD W IDENING I MPROVEMENTS P ROJECT I NITIAL S TUDY/MITIGATED N EGATIVE D ECLARATION Y ORBA L INDA, C ALIFORNIA S EPTEMBER 2020 FIGURES Figure 1: Project Location ................................................................................................................... 2-3 Figure 2: Project Features ................................................................................................................... 2-9 Figure 3: Vegetation .......................................................................................................................... 4-21 Figure 4: Santa Ana Sucker Critical Habitat ...................................................................................... 4-37 Figure 5: Jurisdictional Features (CDFW) .......................................................................................... 4-39 Figure 6: Jurisdictional Features (USACE) ......................................................................................... 4-41 Figure 7: SARCHMP ........................................................................................................................... 4-45 Figure 8: Anaheim HMP .................................................................................................................... 4-47 Figure 9: Modeled Receptor Locations ........................................................................................... 4-113 TABLES Table 2.3.A: Planned Projects ............................................................................................................. 2-6 Table 4.3.A: SCAQMD Significance Thresholds ................................................................................. 4-12 Table 4.3.B: Peak Daily Construction Emissions ............................................................................... 4-13 Table 4.3.C: Construction Localized Impacts Analysis ...................................................................... 4-15 Table 4.4.A: Impacts to Vegetation and Land Cover Types .............................................................. 4-50 Table 4.4.B: Impacts to Jurisdictional Aquatic Resources ................................................................. 4-53 Table 4.6.A: Construction Energy Consumption ............................................................................... 4-68 Table 4.8.A: Project Construction Greenhouse Gas Emissions ......................................................... 4-81 Table 4.13.A: Typical Construction Equipment Noise Levels .......................................................... 4-109 Table 4.13.B: Exterior Traffic Noise Levels ...................................................................................... 4-121 Table 4.13.C: Interior Traffic Noise Levels ...................................................................................... 4-122 Table 4.13.D: Construction Vibration Levels ................................................................................... 4-123 Table 4.13.E: Yorba Linda Boulevard Project Level of Service Summary ........................................ 4-135 APPENDICES (ON CD) A: IS/MND DISTRIBUTION LIST B: NOTICE OF INTENT C: AIR QUALITY DATA SHEETS D: BIOLOGICAL RESOURCES REPORT E: CULTURAL RESOURCE RECORD SEARCH RESULTS F: STRUCTURE PRELIMINARY GEOTECHNICAL REPORT G: LACM FOSSIL LOCALITY SEARCH H: INITIAL SITE ASSESSMENT I: AB 52 CONSULTATION LETTER J: PRELIMINARY DRAINAGE REPORT K: FHWA TRAFFIC NOISE MODEL PRINTOUTS L: TRAFFIC