Preliminary Environmental Assessment FOR MAUI ELECTRIC COMPANY REQUEST FOR PROPOSALS FOR VARIABLE RENEWABLE DISPATCHABLE GENERATION KAHANA SOLAR PROJECT MAUI, HAWAII Prepared for: Innergex Renewables USA, LLC 1185 West George Street, Suite 900 Vancouver, British Columbia V6E 4E6 Prepared by: Tetra Tech, Inc. 737 Bishop Street, Suite 2340 Honolulu, HI 96813 November 2019 PRELIMINARY EA FOR MECO RFP RESPONSE Table of Contents Introduction ............................................................................................................................................................... 1 1.1 Project Description .................................................................................................................................. 1 Natural Environment ............................................................................................................................................. 3 2.1 Air Quality ................................................................................................................................................... 3 2.1.1 Existing conditions .................................................................................................................. 3 2.1.2 Short- and Long-Term Impacts .......................................................................................... 3 2.1.3 Best Management Practices and Mitigation .................................................................. 4 2.2 Biology .......................................................................................................................................................... 4 2.2.1 Wildlife ......................................................................................................................................... 5 2.2.2 Vegetation ................................................................................................................................. 10 2.3 Climate ........................................................................................................................................................ 12 2.3.1 Existing Conditions ................................................................................................................ 12 2.3.2 Short- and Long-Term Impacts ........................................................................................ 13 2.3.3 Best Management Practices and Mitigation ................................................................ 13 2.4 Soils .............................................................................................................................................................. 13 2.4.1 Existing Conditions ................................................................................................................ 13 2.4.2 Short- and Long-Term Impacts ........................................................................................ 14 2.4.3 Best Management Practices and Mitigation ................................................................ 15 2.5 Topography and Geology .................................................................................................................... 15 2.5.1 Existing Conditions ................................................................................................................ 15 2.5.2 Short- and Long-Term Impacts ........................................................................................ 15 2.5.3 Best Management Practices and Mitigation ................................................................ 16 Land Regulation ..................................................................................................................................................... 16 3.1 Land Uses .................................................................................................................................................. 16 3.1.1 Existing Conditions ................................................................................................................ 16 3.1.2 Short- and Long-Term Impacts ........................................................................................ 17 3.1.3 Best Management Practices and Mitigation ................................................................ 17 3.2 Natural Hazards ...................................................................................................................................... 18 3.2.1 Existing Conditions ................................................................................................................ 18 3.2.2 Short- and Long-Term Impacts ........................................................................................ 18 3.2.3 Best Management Practices and Mitigation ................................................................ 19 3.3 Noise ............................................................................................................................................................ 19 3.3.1 Existing Conditions ................................................................................................................ 21 3.3.2 Short- and Long-Term Impacts ........................................................................................ 22 3.3.3 Best Management Practices and Mitigation ................................................................ 22 Tetra Tech, Inc. i Kahana Solar Power Project PRELIMINARY EA FOR MECO RFP RESPONSE 3.4 Roadways and Traffic ........................................................................................................................... 23 3.4.1 Existing Conditions ................................................................................................................ 23 3.4.2 Short- and Long-Term Impacts ........................................................................................ 23 3.4.3 Best Management Practices and Mitigation ................................................................ 23 3.5 Utilities ....................................................................................................................................................... 24 3.5.1 Existing Conditions ................................................................................................................ 24 3.5.2 Short- and Long-Term Impacts ........................................................................................ 25 3.5.3 Best Management Practices and Mitigation ................................................................ 25 Socio-Economic Characteristics ....................................................................................................................... 25 4.1 Existing Conditions ............................................................................................................................... 25 4.2 Short- and Long-Term Impacts ........................................................................................................ 26 4.3 Best Management Practices and Mitigation ................................................................................ 26 Aesthetic/Visual Resources ............................................................................................................................... 26 5.1 Existing Conditions ............................................................................................................................... 26 5.2 Short- and Long-Term Impacts ........................................................................................................ 27 5.3 Best Management Practices and Mitigation ................................................................................ 27 Hazardous Materials and Wastes .................................................................................................................... 28 6.1 Existing Conditions ............................................................................................................................... 28 6.2 Short- and Long-Term Impacts ........................................................................................................ 28 6.3 Best Management Practices and Mitigation ................................................................................ 29 Water Quality .......................................................................................................................................................... 29 7.1 Existing Conditions ............................................................................................................................... 29 7.2 Short- and Long-Term Impacts ........................................................................................................ 30 7.3 Best Management Practices and Mitigation ................................................................................ 30 Public Safety Services........................................................................................................................................... 31 8.1 Existing Conditions ............................................................................................................................... 31 8.1 Short- and Long-Term Impacts ........................................................................................................ 31 8.2 Best Management Practices and Mitigation ................................................................................ 31 Recreation ................................................................................................................................................................