Approval and Promulgation of Implementation Plans; State of Washington; Regional Haze State Implementation Plan; Federal Implementation Plan for Best Available Retrofit Technology for Alcoa Intalco Operations, Tesoro Refining and Marketing, and Alcoa Wenatchee

The Environmental Protection Agency (EPA or Agency) is taking final action to partially approve and partially disapprove a State Implementation Plan (SIP) submitted by the State of Washington (State) on December 22, 2010, as meeting the requirements of Clean Air Act (CAA or the Act) section 169 and federal regional haze regulations and to promulgate a Federal Implementation Plan (FIP) for the disapproved elements of the SIP. As described in Part I of this preamble, this final rule approves numerous elements in the SIP including the State's Best Available Retrofit Technology (BART) determinations for a number of sources. This action also: Disapproves the NO<INF>X</INF> BART determination and promulgates a Federal BART alternative for five BART emission units at the Tesoro Refining and Marketing refinery (Tesoro refinery) located in Anacortes, Washington; finalizes a limited approval and limited disapproval of the State's SO<INF>2</INF> BART determination and promulgates a Federal BART alternative for the Intalco Aluminum Corp. (Intalco facility) potline operation located in Ferndale, Washington; and disapproves the State's BART exemption for the Alcoa Wenatchee Works located in Malaga, Washington (Wenatchee Works), determines that the Wenatchee Works is subject to BART, and promulgates Federal BART for all emission units subject to BART at the facility.