Ocean Wind LLC Ocean Wind Offshore Wind Farm Project Site Assessment Plan Submitted to the Bureau of Ocean Energy Management September 15, Revised November 9, 2017, January 10, 2018, and February 23, 2018 Prepared by Tetra Tech, Inc. Prepared Scott Lundin, Janelle Lavallee (Tetra Tech ltd) 09 January 2018 Checked Marcus Cross, Charles R Scott (Orsted) 09 January 2018 Accepted Marcus Cross 10 January 2018 / 23 Feb 2018 Approved Pernille Hermansen (Orsted) 10 January 2018 / 23 Feb 2018 Doc. no. 2916398 Ver. no. 2864961C Case no. 200-16-2791 This page intentionally left blank Doc. No. 2916398 Ocean Wind Offshore Wind Farm Site Assessment Plan (Ver. No. 2864961C) Table of Contents 1. Introduction ......................................................................................................................................... 1 1.1 Authorized Representative and Designated Operator ............................................................. 1 1.2 Certified Verification Agent Waiver Request............................................................................ 6 1.3 Best Management Practices .................................................................................................... 6 2. Conformity with Prior BOEM Actions Regarding SAP Activities ......................................................... 7 2.1 Mid-Atlantic Environmental Assessment ................................................................................. 7 2.2 Lease OCS-A 0498 .................................................................................................................. 8 3. Project Description and Objectives ................................................................................................... 10 3.1 Project Description and Objectives ........................................................................................ 10 3.2 Site Location .......................................................................................................................... 12 3.3 Mooring Designs, Power Equipment and Instrumentation .................................................... 14 3.3.1 WindSentinel™ ........................................................................................................... 14 3.3.2 TRIAXYS Buoy ........................................................................................................... 17 4. Deployment/Installation ..................................................................................................................... 19 4.1 Overview of Installation and Deployment Activities ............................................................... 19 4.1.1 WindSentinel™ and TRIAXYS Buoy Deployment ...................................................... 19 4.2 Vessels................................................................................................................................... 20 4.3 Pre-Installation Briefing .......................................................................................................... 21 4.4 Protected Species Avoidance ................................................................................................ 21 4.4.1 Reporting of Injured or Dead Protected Species ........................................................ 22 4.5 Avian and Bat Protection ....................................................................................................... 23 4.6 Marine Trash and Debris Awareness and Elimination ........................................................... 23 4.7 Oil Spill Response .................................................................................................................. 23 4.8 Health and Safety .................................................................................................................. 24 5. Operations and Maintenance ............................................................................................................ 24 5.1 Data Collection and Operations for Wind and Metocean Data .............................................. 24 5.2 Maintenance Activities ........................................................................................................... 24 5.2.1 WindSentinel™ ........................................................................................................... 24 5.2.2 TRIAXYS Buoy ........................................................................................................... 24 5.3 Reporting................................................................................................................................ 25 5.4 Potential Faults or Failures .................................................................................................... 25 5.5 Overview of Decommissioning Activities ............................................................................... 26 i Doc. No. 2916398 Ocean Wind Offshore Wind Farm Site Assessment Plan (Ver. No. 2864961C) 5.6 Site Clearance ....................................................................................................................... 26 5.7 Reporting................................................................................................................................ 26 6. Affected Environment, Potential Impacts, and Mitigation Measures ................................................ 26 6.1 Geological Conditions ............................................................................................................ 27 6.1.1 Western Buoy Deployment Area ................................................................................ 27 6.1.2 Eastern Buoy Deployment Area ................................................................................. 28 6.1.3 Natural Seafloor and Sub-Seafloor Hazards .............................................................. 30 6.2 Archaeological Resources ..................................................................................................... 32 6.2.1 Affected Environment ................................................................................................. 32 6.2.2 Potential Impacts and Proposed Mitigation Measures ............................................... 33 6.3 Benthic Resources ................................................................................................................. 33 6.3.1 Western Buoy Deployment Area ................................................................................ 33 6.3.2 Eastern Buoy Deployment Area ................................................................................. 34 6.4 Fisheries................................................................................................................................. 34 6.5 Marine Mammals and Sea Turtles ......................................................................................... 35 6.6 Avian and Bat Resources ...................................................................................................... 35 6.7 Water Quality ......................................................................................................................... 36 6.8 Air Quality............................................................................................................................... 36 6.8.1 Potential Impacts and Proposed Mitigation Measures ............................................... 36 6.9 Socioeconomic Resources .................................................................................................... 37 6.10 Meteorological and Oceanographic Hazards......................................................................... 38 7. References ........................................................................................................................................ 38 7.1 General .................................................................................................................................. 38 7.2 Fisheries................................................................................................................................. 38 7.3 Marine Mammals and Sea Turtles ......................................................................................... 39 7.4 Avian and Bat Resources ...................................................................................................... 40 7.5 Water Quality ......................................................................................................................... 41 7.6 Air Quality............................................................................................................................... 41 7.7 Socioeconomic Resources .................................................................................................... 42 7.8 Meteorological and Oceanographic Hazards......................................................................... 42 ii Doc. No. 2916398 Ocean Wind Offshore Wind Farm Site Assessment Plan (Ver. No. 2864961C) List of Tables Table 1-1 Site Assessment Plan Requirements for Commercial Leases Pursuant to §585.105(a), 606(a), 610(a) and (b), and 611(a) and (b) ............................................................................ 3 Table 1-2 Permit Matrix .......................................................................................................................... 5 Table 1-3 Best Management Practices .................................................................................................. 6 Table 2-1 Comparison of EA and SAP Elements ..................................................................................