National emission standards for hazardous air pollutants (NESHAP) for aerospace manufacturing and rework facilities were proposed in the Federal Register on June 6, 1994. This Federal Register action announces the EPA's final decisions on the rule and promulgates the NESHAP for aerospace manufacturing and rework facilities. Aerospace manufacturing and rework operations emit many of the pollutants identified in the Clean Air Act (Act) list of 189 hazardous air pollutants (HAP). The intent of the standards is to protect public health by requiring existing and new major sources to control emissions to the level achievable by the maximum achievable control technology (MACT) consistent with section 112(d) of the Act. The HAP listed in Section 112(b)(1) emitted by aerospace facilities that would be covered by this final rule include, chromium, cadmium, methylene chloride, toluene, xylene, methyl ethyl ketone, ethylene glycol and glycol ethers. This rule will reduce nationwide emissions of HAP from at least 2,869 major source aerospace manufacturing and rework facilities by approximately 112,600 Mg (123,700 tons).