National Emission Standards for Hazardous Air Pollutants: Surface Coating of Wood Building Products

This action promulgates national emission standards for hazardous air pollutants (NESHAP) for wood building products surface coating operations. The final standards establish emission limitations, operating limits, and work practice requirements for all major sources that apply a surface coating to a wood building product to reduce certain organics listed as hazardous air pollutants (HAP) in section 112 of the Clean Air Act (CAA). These standards implement section 112(d) of the CAA by requiring all major sources to meet the HAP emission standards reflecting the application of the maximum achievable control technology (MACT). Wood building products surface coating operations emit several HAP, including xylenes, toluene, ethyl benzene, ethylene glycol monobutyl ether (EGBE), other glycol ethers, methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), methanol, styrene, and formaldehyde. We do not have the type of current detailed data on each of the facilities covered by the final rule and the people living around the facilities that would be necessary to conduct an analysis to determine the actual population exposures to the HAP emitted from these facilities and potential for resultant health effects. Therefore, we do not know the extent to which the adverse health effects described above occur in the populations surrounding these facilities. However, to the extent the adverse effects do occur, the final rule will reduce emissions and subsequent exposures. The final rule will reduce HAP emissions by approximately 4,400 megagrams per year (Mg/yr) (4,900 tons per year (tpy)) or by 63 percent from baseline.