National Emission Standards for Hazardous Air Pollutants for Wet-Formed Fiberglass Mat Production

This action adds wet-formed fiberglass mat production to the list of categories of major sources of hazardous air pollutants (HAP) published under section 112(c) of the Clean Air Act (CAA) and to the source category schedule for national emission standards for hazardous air pollutants (NESHAP). This action promulgates the NESHAP for new and existing sources at wet-formed fiberglass mat production facilities. The primary organic HAP emitted by these facilities are formaldehyde, methanol, and vinyl acetate. Exposure to these HAP can cause reversible or irreversible adverse health effects including carcinogenic, respiratory, nervous system, developmental, reproductive, and/or dermal health effects. These NESHAP will reduce nationwide emissions of HAP from the drying and curing ovens at these facilities by 199 megagrams per year (Mg/yr) (219 tons per year or tons/yr), an approximate 74 percent reduction from the current level of emissions. These NESHAP are based on the Administrator's determination that wet-formed fiberglass mat production facilities emit several of the 188 HAP listed in the CAA from the various process operations found within the industry, and that these facilities can be major sources of HAP. These NESHAP will protect the public by requiring all wet-formed fiberglass mat production facilities that are major sources to meet HAP emission standards reflecting the application of the maximum achievable control technology (MACT).