Outer Continental Shelf Air Regulations Consistency Update for Alaska

EPA is finalizing the update of the Outer Continental Shelf ("OCS") Air Regulations proposed in the Federal Register on March 3, 2009. Requirements applying to OCS sources located within 25 miles of States' seaward boundaries must be updated periodically to remain consistent with the requirements of the corresponding onshore area ("COA"), as mandated by section 328(a)(1) of the Clean Air Act ("the Act"). The portion of the OCS air regulations that is being updated pertains to the requirements for OCS sources operating off of the State of Alaska. The intended effect of approving the OCS requirements for the State of Alaska is to regulate emissions from OCS sources in a manner consistent with the requirements onshore. The change to the existing requirements discussed below is incorporated by reference into the regulations and is listed in the appendix to the OCS air regulations.