Draft Environmental Impact Statement for Washington Union Station Expansion Project Appendix C1 – Methodology Report April 2018 Draft Environmental Impact Statement for Washington Union Station Expansion Project This page intentionally left blank. Environmental Impact Statement Methodology Report FINAL April 2018 Draft Final EIS Methodology Report Contents 1 Overview ............................................................................................................................................................. 1 1.1 Introduction ............................................................................................................................................................ 1 1.2 Regulatory Context ................................................................................................................................................. 3 1.3 Study Areas ............................................................................................................................................................. 3 1.4 General – Analysis Years ......................................................................................................................................... 5 1.5 General – Affected Environment ............................................................................................................................ 5 1.6 General – Evaluation Impacts ................................................................................................................................. 5 1.7 Alternatives and Key Assumptions ......................................................................................................................... 6 2 Natural Ecological Systems .................................................................................................................................. 8 2.1 Overview and Definition ......................................................................................................................................... 8 2.2 Regulatory Context ................................................................................................................................................. 8 2.3 Study Area ............................................................................................................................................................... 9 2.4 Affected Environment ............................................................................................................................................. 9 2.5 Environmental Consequences .............................................................................................................................. 10 3 Water Resources and Water Quality ................................................................................................................. 12 3.1 Overview and Definition ....................................................................................................................................... 12 3.2 Regulatory Context ............................................................................................................................................... 12 3.3 Study Area ............................................................................................................................................................. 13 3.4 Affected Environment ........................................................................................................................................... 13 3.5 Environmental Consequences .............................................................................................................................. 15 4 Solid Waste Disposal and Hazardous Materials ................................................................................................. 17 4.1 Overview and Definition ....................................................................................................................................... 17 4.2 Regulatory Context ............................................................................................................................................... 18 4.3 Study Area ............................................................................................................................................................. 19 4.4 Affected Environment ........................................................................................................................................... 20 5 Transportation .................................................................................................................................................. 25 5.1 Overview and Definition ....................................................................................................................................... 25 5.2 Regulatory Context ............................................................................................................................................... 25 5.3 Study Areas ........................................................................................................................................................... 26 5.4 Affected Environment ........................................................................................................................................... 27 5.5 Environmental Consequences .............................................................................................................................. 29 6 Air Quality ......................................................................................................................................................... 44 6.1 Overview and Definition ....................................................................................................................................... 44 6.2 Regulatory Context ............................................................................................................................................... 44 6.3 Study Areas ........................................................................................................................................................... 49 6.4 Affected Environment ........................................................................................................................................... 50 6.5 Environmental Consequences .............................................................................................................................. 51 7 Greenhouse Gas Emissions and Resilience ........................................................................................................ 56 7.1 Overview and Definition ....................................................................................................................................... 56 7.2 Regulatory Context ............................................................................................................................................... 56 7.3 Study Areas ........................................................................................................................................................... 57 7.4 Affected Environment ........................................................................................................................................... 58 8 Energy Resources .............................................................................................................................................. 63 8.1 Overview and Definition ....................................................................................................................................... 63 8.2 Regulatory Context ............................................................................................................................................... 63 8.3 Study Areas ........................................................................................................................................................... 64 Contents i March 2018 Draft Final EIS Methodology Report 8.4 Affected Environment ........................................................................................................................................... 65 8.5 Environmental Consequences .............................................................................................................................. 66 9 Land Use, Land Planning, and Property ............................................................................................................. 68 9.1 Overview and Definition ....................................................................................................................................... 68 9.2 Regulatory Context ............................................................................................................................................... 68 9.3 Study Areas ........................................................................................................................................................... 68 9.4 Affected Environment ........................................................................................................................................... 69 9.5 Environmental Consequences .............................................................................................................................. 70 10 Noise and Vibration ..........................................................................................................................................