National Emission Standards for Hazardous Air Pollutants for Source Categories; National Emission Standards for Hazardous Air Pollutants for Mineral Wool Production

This action promulgates national emission standards for hazardous air pollutants (NESHAP) for new and existing sources in mineral wool production facilities. Hazardous air pollutants (HAPs) emitted by the facilities covered by this rule include carbonyl sulfide (COS), nine hazardous metals, formaldehyde, and phenol. Exposure to these HAPs may be associated with adverse carcinogenic, respiratory, nervous system, dermal, developmental, and/or reproductive health effects. The EPA estimates that the final rule will reduce nationwide emissions of HAPs from these facilities by 46 megagrams per year (Mg/ yr) (51 tons per year (tpy)). In addition, emissions of particulate matter (PM) will be reduced by approximately 186 Mg/yr (205 tpy). This action also amends 40 CFR part 9 by updating the table of currently approved information collection control numbers to include the information requirements contained in this final rule. These standards implement section 112(d) of the Clean Air Act (Act) by requiring all mineral wool production facilities that are major sources to meet hazardous air pollutant (HAP) emission standards reflecting the application of the maximum achievable control technology (MACT). The emissions reductions achieved by these standards, when combined with the emissions reductions achieved by other similar standards, will provide protection to the public and achieve a primary goal of the Act. A supplement to the proposed rule was proposed in the Federal Register on February 12, 1999 (64 FR 7149). The EPA will give careful consideration to all comments on the supplemental proposal and will amend this final rule in a future action as appropriate.