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Westside Purple Line Extension Project, Section 3 WESTSIDE SUBWAY EXTENSION PROJECT Addendum to Thecontract Final No Los Angeles County Metropolitan Transportation Authority Westside Purple Line Extension Project, Section 3 WESTSIDE SUBWAY EXTENSION PROJECT Addendum to theContract Final No. Environmental PS-4350-2000 Impact Report June 2018 State Clearinghouse No. 2009031083 Addendum to the Final Environmental Impact Report Table of Contents Table of Contents 1.0 INTRODUCTION ....................................................................................................................... 1-1 1.1 Regulatory Requirements ............................................................................................ 1-1 1.2 Summary of Findings ................................................................................................... 1-2 1.3 Organization................................................................................................................ 1-2 1.4 Approved Project ........................................................................................................ 1-2 2.0 PROJECT REFINEMENTS ........................................................................................................... 2-1 2.1 Construction Staging Areas .......................................................................................... 2-2 2.1.1 Western VA Construction Staging Area ........................................................... 2-5 2.1.2 Lot 42 Construction Staging Area .................................................................... 2-7 2.1.3 Construction Staging and Work Areas in Caltrans Infiltration Basins ................ 2-7 2.1.4 Construction Staging Area Located West of Bonsall Avenue ............................ 2-7 2.1.5 Replacement Parking Structure ....................................................................... 2-7 2.2 Alignment at the VA Medical Center and Westwood/VA Hospital Station Entrances .... 2-8 2.3 Westwood/VA Hospital Station Access ...................................................................... 2-12 2.4 Murals ....................................................................................................................... 2-15 2.5 Construction Method for Westwood/VA Hospital Station West Crossover ................. 2-18 2.6 Westwood/UCLA Station Entrances ........................................................................... 2-20 2.7 Tunnel Size ................................................................................................................ 2-23 2.8 Grouting .................................................................................................................... 2-23 2.9 Underground Conduits .............................................................................................. 2-25 3.0 EVALUATION OF THE PROJECT REFINEMENTS ......................................................................... 3-1 3.1 Public Transit ............................................................................................................... 3-1 3.1.1 Operational Impacts ....................................................................................... 3-1 3.1.2 Construction-related Impacts .......................................................................... 3-2 3.2 Streets and Highways .................................................................................................. 3-4 3.2.1 Operational Impacts ....................................................................................... 3-4 3.2.2 Construction-related Impacts .......................................................................... 3-8 3.3 Parking ...................................................................................................................... 3-20 3.3.1 Operational Impacts ..................................................................................... 3-20 3.3.2 Construction-related Impacts ........................................................................ 3-22 3.4 Pedestrian, Bicycle, and Bus Transit ........................................................................... 3-24 3.4.1 Operational Impacts ..................................................................................... 3-24 3.4.2 Construction-related Impacts ........................................................................ 3-27 WESTSIDE PURPLE LINE EXTENSION PROJECT June 2018 Page i Addendum to the Final Environmental Impact Report Table of Contents 3.5 Land Use ................................................................................................................... 3-28 3.5.1 Operational Impacts ..................................................................................... 3-28 3.5.2 Construction Phase Evaluation ...................................................................... 3-32 3.6 Communities and Neighborhoods ............................................................................. 3-34 3.6.1 Construction Phase Evaluation ...................................................................... 3-34 3.7 Socioeconomic Characteristics................................................................................... 3-36 3.7.1 Operational Impacts ..................................................................................... 3-36 3.7.2 Construction Phase Evaluation ...................................................................... 3-37 3.8 Visual Quality ............................................................................................................ 3-39 3.8.1 Operational Evaluation ................................................................................. 3-39 3.8.2 Construction Phase Evaluation ...................................................................... 3-42 3.9 Air Quality ................................................................................................................. 3-49 3.9.1 Operational Evaluation ................................................................................. 3-49 3.9.2 Construction Phase Evaluation ...................................................................... 3-50 3.10 Greenhouse Gases..................................................................................................... 3-58 3.10.1 Operational Evaluation ................................................................................. 3-58 3.10.2 Construction Phase Evaluation ...................................................................... 3-59 3.11 Noise and Vibration ................................................................................................... 3-60 3.11.1 Operational Evaluation ................................................................................. 3-60 3.11.2 Construction Phase Evaluation ...................................................................... 3-63 3.12 Energy ....................................................................................................................... 3-77 3.12.1 Operational Evaluation ................................................................................. 3-77 3.12.2 Construction Phase Evaluation ...................................................................... 3-78 3.13 Geologic Hazards ....................................................................................................... 3-80 3.13.1 Operational Evaluation ................................................................................. 3-80 3.13.2 Construction Phase Evaluation ...................................................................... 3-84 3.14 Hazardous Waste and Materials ................................................................................ 3-87 3.14.1 Operational Evaluation ................................................................................. 3-87 3.14.2 Construction Phase Evaluation ...................................................................... 3-88 3.15 Ecosystems/Biological Resources............................................................................... 3-90 3.15.1 Operational Evaluation ................................................................................. 3-90 3.15.2 Construction Phase Evaluation ...................................................................... 3-90 3.16 Water Resources ....................................................................................................... 3-92 3.16.1 Operational Evaluation ................................................................................. 3-92 3.16.2 Construction Phase Evaluation ...................................................................... 3-93 3.17 Safety and Security .................................................................................................... 3-96 3.18 Parklands and Community Services and Facilities ...................................................... 3-98 3.18.1 Operational Evaluation ................................................................................. 3-98 3.18.2 Construction Phase Evaluation ...................................................................... 3-98 WESTSIDE PURPLE LINE EXTENSION PROJECT Page ii June 2018 Addendum to the Final Environmental Impact Report Table of Contents 3.19 Historic, Archaeological, and Paleontological Resources .......................................... 3-100 3.19.1 Operational Evaluation ............................................................................... 3-100 3.19.2 Construction Phase Evaluation .................................................................... 3-103 3.20 Growth Inducing Impacts........................................................................................
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