OSHA rules that protect asbestos workers

OSHA’s construction asbestos standard is about the crew, not the building permit. The rule is 29 CFR 1926.1101. It applies to employers whose employees do construction work that involves asbestos. A homeowner is not the employer of a contractor’s crew. The contractor is. If you hire a company, that company has to follow this standard for its workers even when a state environmental notice also applies.

The exposure limit in the standard is an eight-hour time-weighted average of 0.1 fiber per cubic centimeter of air, measured by the method in the standard or an equivalent method. Employers must keep exposures at or below that limit. The standard also sorts the work so the controls match the job.

Class I work is removal of thermal system insulation and surfacing material, the pipe wrap and sprayed-on material that release fibers readily. Class II work is removal of other asbestos-containing material, and the standard’s examples include wallboard, floor tile and sheeting, roofing and siding shingles, and construction mastics. Class III work is repair and maintenance where asbestos is likely to be disturbed. Class IV work is maintenance and custodial work where employees contact asbestos but do not disturb it, plus cleanup of dust and debris from the higher classes. A person mopping settled dust from a Class I job is not doing nothing. The standard treats that cleanup as Class IV.

Class I, II, and III work must be done inside a regulated area. A regulated area marks where that work happens and where waste accumulates, and it also covers any area where airborne asbestos exceeds, or reasonably may exceed, the exposure limit. The employer posts the area and limits who goes in. All asbestos work inside a regulated area is supervised by a competent person. For Class I and Class II work, that competent person must be specially trained in a course that meets EPA’s Model Accreditation Plan for supervisors, or an equivalent. For Class III and Class IV, the training is the kind EPA requires for school maintenance and custodial staff. “Competent” in this rule means the person can recognize the hazard, pick the control, and has authority to correct it. A general contractor on a multi-employer site is not automatically that person. The standard says the general contractor must still check that the asbestos contractor is in compliance and must require the asbestos contractor to fix violations.

On a multi-employer job, the employer who creates or controls the asbestos contamination has to abate it. If an enclosure around Class I work is breached, the employer who put up the enclosure repairs it. Other employers whose workers are exposed either move those workers out or do their own exposure assessment. You should not send electricians into a torn containment because the abatement crew is at lunch.

This standard is not the same document as the asbestos NESHAP. EPA’s NESHAP overview is about emissions to the outside air, inspections, notices, and waste. OSHA is about the air the worker breathes and the training, respirators, and work practices the employer must provide. A project can be under both. Michigan’s air agency even points readers to the state workplace-safety agency for a separate notice on some jobs. Meeting the demolition notice does not prove the crew’s exposure was measured.

States with their own OSHA programs enforce a state rule that must be at least as protective. Cal/OSHA’s asbestos page requires registration for contractors who remove asbestos with more than 0.1 percent fiber content covering 100 square feet or more, and certification for consultants and technicians who sample or oversee removal at that size. Ask a state-plan state what it enforces rather than assuming the federal text is the only one.

If you are hiring, ask who the competent person will be and which class of work the job is. Ask whether workers have had the training for that class. You are not entitled to run the crew’s respirator program, and you should not. You are entitled to hire a company that can show it is set up to follow 1926.1101. If you are a worker and the enclosure is open, the material is dry, or nobody on site is identified as the competent person, that is a question for the employer and for the OSHA program that covers the state, not a reason to keep working in the dust.

This guide names the classes, the exposure limit, and the competent person. Respirator charts and removal steps stay in the regulation and in the employer’s training.