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 converting a conditional approval of a state implementation plan (SIP) revision submitted by the Commonwealth of Pennsylvania on behalf of the Allegheny County Health Department (ACHD) to a full approval. 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) 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 revised the regulation and submitted the table of VOC content limits for fiberglass boat manufacturing materials to EPA in order to address specific RACT requirements for Allegheny County. Therefore, EPA is converting the conditional approval of the revisions to the Pennsylvania SIP to a full approval in accordance with the requirements of the Clean Air Act (CAA).