National Emission Standards for Hazardous Air Pollutants for Friction Materials Manufacturing Facilities

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This action proposes national emission standards for hazardous air pollutants (NESHAP) for new and existing friction materials manufacturing facilities. Some of these facilities, specifically those that perform solvent mixing, have been identified as major sources of hazardous air pollutants (HAP) including n-hexane, toluene, and trichloroethylene. Exposure to these substances has been demonstrated to cause adverse health effects such as irritation of the lungs, skin, mucous membranes, and effects on the central nervous system, liver, and kidney. These proposed standards would implement section 112(d) of the Clean Air Act (CAA) by requiring all major sources to meet HAP emission standards reflecting the application of the maximum achievable control technology (MACT). Implementation of these proposed standards will reduce HAP emissions by approximately 340 tons per year (tpy).