Proposed Issuance of the NPDES General Permit for Oil and Gas Geotechnical Surveying and Related Activities in Federal Waters of the Beaufort and Chukchi Seas

摘要

EPA Region 10 proposes to issue a National Pollutant Discharge Elimination System (NPDES) General Permit for Oil and Gas Geotechnical Surveying and Related Activities in Federal Waters of the Beaufort and Chukchi Seas (Permit No. AKG-28-4300). As proposed, the Geotechnical General Permit authorizes twelve types of discharges from facilities engaged in oil and gas geotechnical surveys to evaluate the subsurface characteristics of the seafloor and related activities in federal waters of the Beaufort and Chukchi Seas. Geotechnical borings are collected to assess the structural properties of subsurface soil conditions for potential placement of oil and gas installations, which may include production and drilling platforms, ice islands, anchor structures for floating exploration drilling vessels, and potential buried pipeline corridors. Geotechnical surveys result in a disturbance of the seafloor and produce discharges consisting of soil, rock and cuttings materials, in addition to facility-specific waste streams authorized under this general permit. Geotechnical related activities also result in a disturbance of the seafloor and produce similar discharges. These activities may include