Asbestos: chrysotile, amosite, crocidolite, tremolite asbestos, anthophyllite asbestos, actinolite asbestos, and any of these minerals that have been chemically altered; includes PACM
ACM: "asbestos-containing material," any material containing >1% asbestos
PACM: "presumed asbestos-containing material"
Surfacing Material: material that is sprayed, troweled-on, or otherwise applied to surfaces
Thermal System Insulation (TSI): ACM applied to pipes, fittings, boilers, breeching, tanks, ducts or other structural components to prevent heat loss or gain.