Approval and Promulgation of Air Quality Plans; Pennsylvania; Reasonably Available Control Technology (RACT) Determinations for Hydro Carbide Tool Company's Case-by-Case Sources Under the 1997 and 2008 8-Hour Ozone National Ambient Air Quality Standards

The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the Commonwealth of Pennsylvania. This revision was submitted by the Pennsylvania Department of Environmental Protection (PADEP) to establish and require reasonably available control technology (RACT) for Hydro Carbide Tool Company (Hydro Carbide), a major source of volatile organic compounds (VOC), pursuant to the Commonwealth of Pennsylvania's conditionally approved RACT regulations. In this rulemaking action, EPA is proposing to approve source-specific (also referred to as "case-by-case") RACT determinations submitted by PADEP for VOC sources at Hydro Carbide. This RACT evaluation was submitted to meet RACT requirements for the 1997 and 2008 8-hour ozone national ambient air quality standards (NAAQS). This action is being taken under the Clean Air Act (CAA).