IN Asbestos Abatement key terms

Any material or product that contains more than one percent asbestos by weight, as determined by the applicable regulatory definition. The threshold drives inspection, notification, work practice, and disposal obligations throughout Indiana's asbestos program.

A group of naturally occurring fibrous silicate minerals that separate into long, thin, durable fibers. Six regulated forms include chrysotile, amosite, crocidolite, anthophyllite, tremolite, and actinolite. Fiber shape and persistence create the health hazard.

The serpentine-group asbestos mineral, accounting for most asbestos used commercially in the United States. Its curly, flexible fibers were common in pipe insulation, floor tile, roofing, and friction products.

A group of straight, needle-like asbestos minerals including amosite, crocidolite, anthophyllite, tremolite, and actinolite. These forms are generally more biopersistent and are associated with higher potency for some diseases than chrysotile.

Describes material that can be crumbled, pulverized, or reduced to powder by hand pressure when dry. Friability determines whether material is likely to release fibers and whether stricter work practices apply.

Describes asbestos-containing material that cannot be crumbled or reduced to powder by ordinary hand pressure. Examples include intact floor tile, roofing, and cementitious siding, which may still become regulated when broken or damaged.

Non-friable asbestos-containing material such as packings, gaskets, resilient floor coverings, and asphalt roofing products. These materials are treated differently from other non-friable material when they become regulated.

All non-friable asbestos-containing material that is not Category I, such as asbestos-cement sheet, pipe, and some exterior products. Category II material is more readily regulated when it is damaged or will be demolished.

Friable ACM, and any non-friable ACM that will be or has been crumbled, pulverized, or reduced to powder during handling, demolition, or renovation. RACM triggers the most stringent emission control and handling requirements.

Material that an inspector assumes contains asbestos because it is of a type commonly manufactured with asbestos and has not been sampled or confirmed otherwise. Treating material as PACM protects workers until testing shows it is not ACM.

Asbestos-containing material sprayed, troweled, or otherwise applied to surfaces for acoustical, fireproofing, or decorative purposes. Examples include sprayed ceiling texture and fireproofing on structural steel.

Asbestos-containing material applied to pipes, fittings, boilers, tanks, ducts, or other components to prevent heat loss or gain. TSI is frequently friable and is a common source of fiber release during renovation.

A chronic, progressive lung disease caused by inhaling asbestos fibers, producing scarring that stiffens lung tissue and impairs gas exchange. It typically follows high cumulative exposures and may appear years after exposure ends.

A rare cancer of the thin membranes lining the chest, abdomen, or heart, strongly associated with asbestos exposure. It has a long latency period and can occur after relatively low exposures, including bystander exposure.

Malignant tumor of the lung associated with asbestos inhalation, with risk greatly increased in smokers. It is one of the most common fatal outcomes of occupational asbestos exposure.

The delay, often decades, between first asbestos exposure and the appearance of disease. Long latency means current illness reflects exposures that occurred many years earlier and that health effects may not appear during employment.

The discharge of microscopic asbestos fibers into air when material is disturbed, crushed, cut, sanded, or weathered. Preventing fiber release is the central objective of work practices, containment, and wet methods.

A thorough on-site survey by a licensed inspector to identify and assess asbestos-containing material before renovation or demolition. It includes locating material, determining friability and condition, and collecting representative samples.

A physical portion of material collected for laboratory analysis to determine asbestos content. Samples must be taken in a manner that avoids contaminating the sample and that represents the material being evaluated.

A laboratory technique using polarized light and refractive index properties to identify asbestos fibers and estimate their percentage in a bulk sample. PLM is the standard method for most building-material analysis.

Any measure taken to permanently eliminate or control asbestos-containing material, including removal, enclosure, encapsulation, repair, and related cleanup. Abatement is regulated work that requires licensed contractors and workers.

A business entity licensed by the state to perform asbestos abatement, inspection, or related activities within the scope of its license. Contractors must meet training, insurance, and notification obligations before beginning work.

An individual who performs asbestos abatement work under supervision and holds a current state-issued worker license. Licensing requires completion of an accredited training course and periodic refresher training.

A licensed individual who directly supervises asbestos abatement work, enforces work practices and safety requirements, and ensures compliance on the project. Supervisor training covers regulation, supervision, and air monitoring concepts.

A licensed professional who conducts asbestos inspections and collects bulk samples for laboratory analysis. Inspector licensing requires accredited training and refresher courses.

A licensed individual who designs response actions, such as abatement specifications and containment plans, for asbestos projects. Designers may also prepare worker protection and air monitoring plans.

A course approved by the state or an authorized body that covers required topics for a specific asbestos discipline and meets minimum hours. Completion is a prerequisite for licensing and must be refreshed periodically.

Periodic retraining required to maintain an asbestos license, typically completed annually for most disciplines. It updates workers on regulatory changes, work practices, and safety and must be documented.

A written submission to the state asbestos program before starting regulated renovation or demolition, describing the project, the material, and the abatement methods. Notification allows regulators to schedule inspections and verify compliance.

The general advance-notice period required before beginning regulated asbestos abatement, counted in working days. Shorter notice may be allowed only in limited circumstances such as emergencies, subject to agency approval.

Abatement made necessary by a sudden, unexpected event such as a broken pipe or storm damage that creates an unsafe condition. Special notification and work practice provisions may apply, but release must still be controlled.

The wrecking or removal of a load-bearing structural member, or the removal of an entire building or structure. Demolition generally requires a thorough asbestos inspection and notification before work begins.

Altering a structure or its components, including removal or modification of walls, ceilings, floors, or mechanical systems. Renovation that disturbs asbestos-containing material triggers inspection, notification, and work practice requirements.

The state agency that administers Indiana's asbestos program, including licensing, notification review, inspection, and enforcement. IDEM's asbestos rules implement federal requirements and add state-specific provisions.

Federal Clean Air Act standards, including the asbestos NESHAP, that govern asbestos handling, emission control, and waste disposal. Indiana's asbestos rules are built on and supplement these federal requirements.

A physical barrier, such as plastic sheeting and sealed framing, that isolates the work area and prevents asbestos fibers from escaping. Containment includes critical barriers, decontamination units, and negative pressure where required.

A condition in which air pressure inside a containment is lower than outside, so air flows inward and fibers do not escape. It is maintained with exhaust units and monitored to verify containment integrity.

A filter rated to capture at least 99.97 percent of particles 0.3 micrometers in diameter. HEPA filtration is required for vacuuming, negative air machines, and exhaust from containment in asbestos work.

Techniques of wetting asbestos-containing material before and during disturbance to suppress fiber release. Wetting agents and misting are used during removal, bagging, and cleanup to keep material damp.

A sequence of connected rooms, including a clean room, shower, and equipment room, through which workers pass when entering and leaving a containment. It prevents fibers from being carried out on clothing or equipment.

Protective gear such as respirators, disposable coveralls, gloves, and eye protection worn to limit worker exposure. PPE must be selected for the task, worn properly, and removed in the decontamination sequence.

Use of an approved respirator, fit-tested and worn under a written program, to reduce inhalation of asbestos fibers. Selection depends on exposure levels and must comply with occupational safety requirements.

Sampling and analysis of airborne fibers to evaluate exposure and verify that containment is working. Results guide respirator selection, determine whether reoccupancy is allowed, and document compliance.

The process of verifying, through visual inspection and air sampling, that a work area is free of visible debris and airborne fiber levels are acceptable before containment is removed or the area is reoccupied.

The handling, packaging, transport, and ultimate disposal of asbestos-containing waste in accordance with regulatory requirements. Waste must be wetted, sealed in leak-tight containers, labeled, and taken to an approved disposal site.

Marking asbestos waste containers and shipments with required warning information identifying the contents as asbestos. Labels must remain legible and attached through transport to the disposal site.

A shipping document that tracks asbestos waste from the generation site to the disposal facility, identifying the generator, transporter, and receiving site. It provides the chain-of-custody record required for compliance.

A landfill or facility authorized to receive asbestos-containing waste and operated under applicable permit requirements. Waste must be disposed of only at sites that accept asbestos and follow required covering practices.

A regulatory provision that removes certain activities, materials, or quantities from specific asbestos requirements. Exemptions are narrow and fact-specific, so candidates must verify eligibility rather than assume work is unregulated.

A project document describing the scope of abatement, containment design, work practices, worker protection, air monitoring, and waste handling. It guides the supervisor and demonstrates how the project will meet regulatory requirements.