National Emission Standards for Hazardous Air Pollutants: Cellulose Products Manufacturing

This action promulgates national emission standards for hazardous air pollutants (NESHAP) for cellulose products manufacturing. Cellulose products manufacturing includes both the Miscellaneous Viscose Processes source category and the Cellulose Ethers Production source category. The Miscellaneous Viscose Processes source category comprises the cellulose food casing, rayon, cellulosic sponge, and cellophane manufacturing industries. The Cellulose Ethers Production source category comprises the methyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose manufacturing industries. The EPA has identified the Miscellaneous Viscose Processes source category and the Cellulose Ethers Production source category as including major sources of emissions of hazardous air pollutants (HAP), such as carbon disulfide (CS<INF>2</INF>), carbonyl sulfide, ethylene oxide, methanol, methyl chloride, propylene oxide, and toluene. The final rule will 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). The final rule will reduce HAP emissions by approximately 1,600 megagrams per year (Mg/yr) (1,700 tons per year (tpy)). In addition, the final rule will reduce hydrogen sulfide (H<INF>2</INF>S) emissions by approximately 410 Mg/yr (450 tpy).