Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Allegheny County's Adoption of Control Techniques Guidelines for Four Industry Categories for Control of Volatile Organic Compound Emissions

The Environmental Protection Agency (EPA) is conditionally approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Pennsylvania on behalf of the Allegheny County Health Department (ACHD). This SIP revision includes amendments to the ACHD Rules and Regulations, Article XXI, Air Pollution Control, and meets the requirement to adopt Reasonably Available Control Technology (RACT) for sources covered by EPA's Control Techniques Guidelines (CTG) standards for the following categories: Miscellaneous metal and/or plastic parts surface coating processes, automobile and light-duty truck assembly coatings, miscellaneous industrial adhesives, and fiberglass boat manufacturing materials. Upon review of the submittal, EPA found that the average monomer volatile organic compound (VOC) content limits were referenced but not included in the regulation for fiberglass boat manufacturing materials. ACHD has committed to revising the regulation and submitting the table of VOC content limits for fiberglass boat manufacturing materials to EPA in order to address specific RACT requirements for Allegheny County. EPA is, therefore, conditionally approving this revision to the Pennsylvania SIP in accordance with the requirements of the Clean Air Act (CAA).