PB2000-104 950
March 2000
2. Applicability of Parts 264/265, Subparts AA, BB, and CC
The RCRA air emissions standards in 40 CFR Parts 264 and 265, Subparts AA, BB, and CC
apply to certain process vents, equipment, tanks, surface impoundments, and containers
managing hazardous waste at large quantity generator (LQG) sites and treatment, storage, and
disposal facilities (TSDFs). If one of these subparts is applicable to a particular activity
conducted by a LQG or a TSDF, do the other two subparts automatically apply?
If one of the Subpart AA, BB, or CC requirements apply to a particular activity, this
does not mean that the others automatically apply as well. The standards of each
subpart apply only when the substantive applicability provisions of the specific subpart
are met (61 FR 59932,59934; November 25,1996). Specifically, Subpart AA applies to
process vents associated with distillation, fractionation, thin-film evaporation, solvent
extraction, and air or steam stripping operations that manage hazardous wastes with
organic concentrations of at least 10 parts per million by weight (264.1030(b) and
265.1030(b)). Subpart BB applies to equipment, as defined in 264.1031, that contains or
contacts hazardous wastes with organic concentrations of at least 10 percent by weight
(264.1050(b) and 265.1050(b)). Subpart CC applies to facilities that manage hazardous
waste in containers, tanks, or surface impoundments subject to either Subparts I, J, or K,
respectively, of Parts 264 or 265 (264.1080(a) and 265.1080(a)). Each subpart has its
own specific applicability criteria that an owner and operator must evaluate to
determine if it is applicable to a particular activity, as the three subparts operate
independently of one another.
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