AK Asbestos Abatement key terms

Asbestos-containing material that can be crumbled, pulverized, or reduced to powder by hand pressure when dry, making fiber release likely during routine disturbance.

Asbestos-containing material that cannot be crumbled or pulverized by ordinary hand pressure, such as intact floor tile or asbestos cement, and releases fibers mainly when cut, ground, or broken.

Asbestos-containing material: any building product or material that contains more than one percent asbestos by weight as determined by an accredited laboratory analysis.

A building material assumed to contain asbestos because it has not been sampled or analyzed, so it is handled with the same precautions as confirmed ACM until proven otherwise.

A physical piece of building material collected in a prescribed manner and analyzed by an accredited laboratory to determine whether and how much asbestos it contains.

A laboratory method that identifies asbestos minerals in bulk samples by observing their optical properties under polarized light, commonly used for building material analysis.

A laboratory counting method that estimates airborne fiber concentration by making fibers visible against a background, but it cannot distinguish asbestos from other fibers.

A high-magnification analysis technique that identifies and counts asbestos fibers specifically, often used for final clearance air samples where fiber type confirmation is required.

A chronic lung disease caused by inhaling asbestos fibers, producing progressive scarring of lung tissue that stiffens the lungs and causes shortness of breath and reduced function.

A rare cancer of the lining of the lungs, chest, or abdomen caused by asbestos exposure, with a long latency and generally poor prognosis.

The delay, often ten to forty years or more, between first asbestos exposure and the appearance of an asbestos-related disease such as asbestosis or mesothelioma.

The greatly increased lung cancer risk seen in people who both smoke and are exposed to asbestos, exceeding the risk from either exposure alone.

National Emission Standards for Hazardous Air Pollutants: federal regulations governing how asbestos-containing material is handled, packaged, and disposed of during demolition and renovation to prevent air release.

The legally enforceable workplace airborne asbestos limit, set as an eight-hour time-weighted average, that employers must keep workers below through controls and monitoring.

A short-term airborne asbestos exposure ceiling measured over a thirty-minute sampling period that must not be exceeded at any time during a work shift.

An average airborne exposure calculated over a defined sampling period, usually eight hours, weighting concentrations by the time spent at each level.

A procedure that verifies a tight-fitting respirator seals against the wearer's face, performed at least annually and whenever the respirator model or wearer's facial condition changes.

A required health screening, usually a questionnaire reviewed by a physician or licensed health care professional, that determines whether a worker can safely wear a respirator.

A tight-fitting air-purifying respirator equipped with high-efficiency filters that capture airborne particles, including asbestos fibers, at high removal efficiency.

A respirator that uses a battery-powered blower to push air through filters into a loose-fitting hood or tight-fitting facepiece, reducing breathing effort during abatement work.

An employer-provided program of periodic health examinations, including work history and lung testing, offered to workers exposed to asbestos above specified levels or durations.

A sealed work area kept at lower air pressure than surrounding spaces using exhaust fans and HEPA filtration, so air leaks inward and fibers do not escape.

A physical partition such as plastic sheeting or rigid board that seals off the work area and prevents asbestos fibers from migrating to occupied spaces.

A sequence of connected rooms, typically clean, shower, and dirty, that workers pass through to remove contamination from themselves and their equipment before leaving the work area.

Visible asbestos debris, dust, or residue on a surface, tool, or protective clothing that must be removed before final cleaning and clearance.

A sealed plastic bag with built-in gloves and an access opening, used to enclose small fixtures or pipe sections so material can be removed without releasing fibers.

Thoroughly soaking asbestos-containing material with water or a wetting agent before and during removal to keep fibers bound and limit airborne release.

Water mixed with a surfactant or wetting agent that reduces surface tension, allowing it to penetrate and saturate asbestos-containing material more effectively.

A removal technique in which a section of pipe or material is wetted, wrapped in plastic, and cut free so it can be removed with minimal fiber release.

A vacuum equipped with high-efficiency particulate air filtration, used to clean surfaces and equipment without exhausting collected asbestos fibers back into the air.

Post-abatement air testing conducted inside the work area to confirm fiber levels are below the required threshold before containment is removed and the space is reoccupied.

A close examination of the work area after cleaning to confirm no visible dust, debris, or residue remains, typically required before clearance air sampling begins.

A clearance sampling technique that deliberately disturbs the air, for example with fans or brushing, to stir up any remaining fibers so the sample better reflects worst-case conditions.

A tracking document that follows asbestos waste from the generation site to the disposal facility, confirming proper transport and receipt under federal rules.

Packaging such as sealed, labeled plastic bags or drums that holds asbestos waste without releasing fibers or dust during storage, handling, and transport.

An individual trained and authorized to identify asbestos hazards, evaluate worker exposure, and take corrective action to control conditions at an abatement site.

The process of removing, encapsulating, or enclosing asbestos-containing material to prevent fiber release, performed under controlled conditions.