A group of naturally occurring fibrous silicate minerals (chrysotile, amosite, crocidolite, and others) used historically in insulation, fireproofing, and cement products. Inhalation of airborne fibres causes asbestosis, mesothelioma, and lung cancer; handling is tightly regulated.
Asbestos-containing material (ACM) is categorized as friable (readily crumbled by hand pressure, releasing fibres) or non-friable (bound in a matrix such as cement or vinyl). Friable ACM presents the highest occupational and environmental exposure risk and is the focus of strict abatement protocols. Common site sources include legacy building insulation, demolition debris, and historical pipe wrapping mixed into soil at industrial sites.
Handling falls under jurisdiction-specific regulations including the U.S. NESHAP asbestos rules, Health Canada and provincial OHS codes, and CSA Z1000-series occupational health and safety management standards. Disposal requires accredited transporters and dedicated asbestos cells at licensed landfills. On mixed-waste remediation sites, asbestos handling adds material constraints to excavation sequencing, dust control, and worker certification.
Asbestos in soil is the growing remediation problem. Legacy demolition, pipe burial, and fill practices left asbestos fragments and fibre dispersed through soil at industrial sites, rail yards, and former military properties across North America. Unlike building abatement, soil asbestos cannot be wrangled by enclosure: it requires segregation, soil washing or screening where feasible, and disposal under controlled conditions. Because fibres are a physical hazard rather than a chemical one, thermal treatment does not destroy asbestos; the mineral fibres must be physically separated or securely contained, which shapes how mixed asbestos-and-chemical sites are sequenced.
Also known as: asbestos, ACM, asbestos-containing material.
Asbestos-containing material (ACM) is any material containing asbestos fibres, historically used in insulation, fireproofing, and cement products. ACM is classed as friable (readily crumbled, releasing fibres) or non-friable (bound in a matrix), with friable material carrying the highest exposure risk.
Yes, but not by destruction. Asbestos fibres are a physical hazard, so soil remediation relies on segregation, screening or soil washing, and disposal in dedicated asbestos cells at licensed landfills. On mixed-waste sites, asbestos handling constrains excavation sequencing, dust control, and worker certification.
Inhalation of airborne asbestos fibres causes asbestosis, mesothelioma, and lung cancer, with latency periods of decades. Handling is governed by the U.S. NESHAP asbestos rules, Health Canada and provincial OHS codes, and CSA Z1000-series standards.
A family of six naturally-occurring fibrous silicate minerals — regulated under US EPA NESHAP and OSHA — whose remediation is a containment and disposal problem, not a treatment problem: the fibers are chemically stable and cannot be biologically or thermally destroyed at practical scales.
Per- and polyfluoroalkyl substances: a class of more than 12,000 synthetic compounds built around exceptionally stable carbon-fluorine bonds. PFAS is the family name, not a single chemical. PFOA and PFOS are two specific members of this class.
Perfluorooctanoic acid: a specific eight-carbon long-chain PFAS compound, historically used in non-stick coatings and AFFF firefighting foam. Classified by IARC in 2023 as Group 1, carcinogenic to humans.
Perfluorooctane sulfonic acid: a specific eight-carbon long-chain PFAS compound, historically the active surfactant in 3M Scotchgard and AFFF firefighting foam. Classified by IARC in 2023 as Group 2B, possibly carcinogenic to humans.
Polychlorinated dibenzo-p-dioxins and related furans: highly persistent, fat-soluble chlorinated compounds formed as unintended byproducts of combustion, chlorine-based manufacturing, and herbicide production, with TCDD among the most toxic substances ever characterized.