Although asbestos fibers are a known carcinogen, proper management and control of Asbestos-Containing Materials (ACM) is the most cost-effective way for a building owner or manager to minimize risk to building occupants while controlling costs. The OSHA Asbestos Construction Standard, 29 CFR 1926.1101, requires that the employer communicate the existence of asbestos to building occupants. “Employers and building owners shall identify TSI (thermal system insulation) and sprayed or troweled on surfacing materials as asbestos-containing…” A thorough building survey with bulk material sampling and analysis by accredited personnel is the only way to prove that a presumed asbestos containing material (PACM) does not contain asbestos.