What asbestos-containing materials are regulated under the Asbestos NESHAP?
ACM regulated under the NESHAP is referred to as “regulated asbestos-containing material” (RACM). RACM is defined in 40 CFR 61.141 of the NESHAP and includes: (1) friable asbestos-containing material; (2) Category I non-friable ACM that has become friable; (3) Category I non-friable ACM that has been or will be sanded, ground, cut, or abraded; or (4) Category II non-friable ACM that has already been or is likely to become crumbled, pulverized, or reduced to powder.
