Asbestos removal, testing and lead terms, and the Cal/OSHA standards that govern the work. Asbestos abatement is performed by a Cal/OSHA (DOSH)-registered subcontractor.
Prices for this work: asbestos removal · testing · tank and hazardous materials · lead paint removal · concrete cutting and coring · demolition · all 2026 prices
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Related services: Asbestos abatement (Cal/OSHA, DOSH-registered subcontractor) · Commercial asbestos abatement (Cal/OSHA, DOSH-registered subcontractor) · Lead removal
- Asbestos removal
- Testing and surveys
- Lead
- Cal/OSHA asbestos standard (Title 8, Section 1529)
- Other Cal/OSHA standards
- About this topic
Asbestos removal
- ACCM (asbestos-containing construction material)
- Cal/OSHA’s term for construction material with more than 0.1 percent asbestos by weight. It is the threshold for Cal/OSHA registration, notification and worker protections, lower than the 1 percent EPA and the air districts use.
- Amended water
- Water mixed with a wetting agent and sprayed on asbestos material so fibers stay wet and don’t become airborne during removal. Rule 1403 requires asbestos material to stay adequately wet from removal through bagging.
- Asbestos warning label
- The danger label required on bags, wrapped pieces and containers of asbestos waste, warning of cancer and lung disease. The generator’s name and job location are added for shipment. Labels go on the outer bag or wrap, and waste without them can be turned away at the landfill.
- Asbestos-containing material (ACM)
- Material with more than 1 percent asbestos by lab analysis under federal and air-district rules; California’s worker-safety rules also cover construction material with more than 0.1 percent. Common examples are popcorn ceilings, floor tile mastic, duct wrap and transite. Cal/OSHA presumes thermal insulation and surfacing material in buildings built before 1981 contain asbestos until testing shows otherwise. Asbestos abatement by our Cal/OSHA, DOSH-registered subcontractor
- Category I nonfriable
- Asbestos packings, gaskets, resilient floor covering and asphalt roofing products that cannot be crumbled by hand. Under the federal rule it can often stay in place during demolition if it is in good condition and won’t be sanded, ground or cut.
- Category II nonfriable
- All other nonfriable asbestos material, such as transite siding and asbestos cement pipe. Under the federal asbestos rule, it must come out before demolition if the work is likely to crumble, pulverize or grind it.
- Containment
- Plastic sheeting, sealed openings and controlled entry that keep asbestos or lead dust inside the work area. It is checked for leaks before removal starts, often with smoke tubes, and stays up until the area passes clearance. Commercial asbestos abatement by our Cal/OSHA, DOSH-registered subcontractor
- Critical barrier
- Plastic sheeting sealed over doors, vents, windows and other openings to isolate an asbestos or lead work area from the rest of the building. Critical barriers are usually two layers of 6-mil plastic over vents, ducts and any opening air could pass through. Commercial asbestos removal, performed by a Cal/OSHA, DOSH-registered subcontractor
- Decontamination unit
- Connected rooms at the edge of an asbestos containment where workers remove protective clothing and shower before leaving the work area. A full unit has three rooms in a row: an equipment room, a shower and a clean room. Commercial asbestos abatement by our Cal/OSHA, DOSH-registered subcontractor
- Encapsulation
- Sealing asbestos material or lead paint in place with a coating made to bind it, instead of removing it. The material stays in the building, so it still appears on later surveys and may have to come out before any future demolition.
- Enclosure
- Building an airtight barrier around asbestos material so it stays in place but is sealed off from the occupied space. Like encapsulation, it leaves the asbestos in place, so it shows up on later surveys and may have to come out before demolition.
- Friable
- Asbestos material that can be crumbled by hand pressure. Friable material releases fibers more easily and needs more careful removal. Popcorn ceilings, pipe lagging and sprayed fireproofing are common friable materials in older buildings.
- Glove bag
- A sealed plastic bag with built-in gloves, used to remove small amounts of asbestos pipe insulation without a full containment. Cal/OSHA limits glove bags to pipe runs and small items that fit inside, and each bag is used once.
- HEPA
- High-efficiency particulate air filtration, used in vacuums and air machines during asbestos and lead work. A HEPA filter captures at least 99.97 percent of particles 0.3 microns in size.
- Mastic
- The adhesive under floor tile or on duct seams. Black mastic in older buildings often contains asbestos. It is removed wet with solvents or by careful mechanical methods inside a regulated area, and the solvents must meet SCAQMD’s VOC limits. Asbestos removal, performed by a Cal/OSHA, DOSH-registered subcontractor
- Negative air
- Air machines that keep a containment area under slightly lower pressure, so dust flows in rather than out. Cal/OSHA calls for at least 0.02 inches of water below outside air, and the air inside is usually replaced every 5 to 15 minutes. Commercial asbestos removal, performed by a Cal/OSHA, DOSH-registered subcontractor
- NESHAP
- The federal National Emission Standards for Hazardous Air Pollutants. Its asbestos rule sets survey, notification and handling requirements for demolition and renovation; in the South Coast district they are enforced through Rule 1403. It is 40 CFR Part 61, Subpart M, and it requires notification for every demolition even when no asbestos is found.
- PACM (presumed asbestos-containing material)
- Thermal system insulation and sprayed or troweled surfacing material in buildings built before 1981, which Cal/OSHA presumes contains asbestos until sampling shows otherwise. Asphalt and vinyl flooring installed before 1981 is also treated as asbestos-containing unless tested.
- RACM (regulated asbestos-containing material)
- Under the federal rule: friable asbestos material, plus nonfriable material that has become friable or will be crushed, sanded, ground or cut during the work. It must be removed before demolition. Disturbing at least 260 linear feet, 160 square feet or 35 cubic feet of it triggers the rule’s full notification and work practices.
- Transite
- A cement board or pipe that often contains asbestos, common in older flues, siding and water lines. Breaking it releases fibers, so pieces are removed whole where possible and wrapped in 6-mil plastic. Asbestos abatement by our Cal/OSHA, DOSH-registered subcontractor
- Waste load-out
- The sealed passage at the edge of an asbestos containment where bagged and wrapped waste is cleaned and passed out to the waste bin, kept separate from the worker decontamination unit. Bags are wiped or HEPA-vacuumed and placed in a second clean bag before they leave the containment.
- Waste manifest
- The shipping document that tracks regulated waste, such as asbestos, from the job to the disposal facility. The landfill returns a signed copy, and the generator must follow up and report if that copy doesn’t come back on time.
Testing and surveys
- AHERA
- The federal Asbestos Hazard Emergency Response Act of 1986, which requires K-12 schools, public and private, to inspect for asbestos, keep a management plan and use accredited inspectors and workers. Its TEM clearance method is used on school abatement projects.
- Air clearance
- Air samples taken after asbestos removal to show airborne fiber levels meet the clearance standard before the area is reoccupied. Some projects require them; others accept a visual inspection. California schools use TEM clearance under the federal AHERA method, which is stricter than a PCM fiber count.
- Asbestos survey
- An inspection in which a certified consultant samples building materials before demolition or renovation and reports which ones contain asbestos. SCAQMD Rule 1403 requires a survey before any demolition or renovation, whatever the building’s age.
- Certified asbestos consultant (CAC)
- A Cal/OSHA-certified professional who performs asbestos surveys, writes abatement specifications and oversees air monitoring and clearance. Cal/OSHA keeps a public list of certified consultants, so a consultant’s certificate can be checked before hiring.
- Phase contrast microscopy (PCM)
- A lab method that counts fibers on air-sample filters, used for worker and work-area air monitoring during asbestos jobs. It counts every fiber of a set size, not just asbestos, so a high count may need TEM to tell what the fibers are.
- Point count
- A more precise lab method for estimating how much asbestos a sample contains, used when a result is close to the 1 percent threshold. Under 1 percent falls outside the federal NESHAP definition, but Cal/OSHA worker rules still apply to material over 0.1 percent.
- Polarized light microscopy (PLM)
- The standard lab method for identifying asbestos in bulk samples of building material. Results are reported as a percent of asbestos, and a sample estimated under 10 percent can be point counted for a more precise result.
- Transmission electron microscopy (TEM)
- A lab method that identifies asbestos fibers too small for other methods to see. It is used for clearance air samples on schools and many public projects. It sees fibers far too thin for a light microscope and identifies which type of asbestos they are.
- XRF
- X-ray fluorescence: a handheld analyzer that reads the lead content of paint on the spot without taking a chip sample. Under federal rules, paint with 1.0 milligram of lead per square centimeter or more is lead-based paint.
Lead
- Friction and impact surfaces
- Painted surfaces that rub or get struck, such as window sashes, door edges and stair treads. Lead paint on them wears into dust. Federal lead rules treat damaged lead paint on these surfaces as a hazard even when the rest of the paint is intact.
- In California, lead abatement is work meant to permanently eliminate lead hazards, and it is done by CDPH-certified workers under a CDPH-certified supervisor. Lead-related construction, such as renovation that disturbs lead paint, follows Cal/OSHA’s lead standard and, in pre-1978 homes and child-occupied facilities, the EPA RRP rule. Lead removal service
- Lead-based paint
- Paint with 1.0 milligram of lead per square centimeter or more, or more than 0.5 percent lead by weight, the definition federal rules and California’s lead regulations use. Paint with less lead can still put workers over Cal/OSHA’s limits when it is sanded, cut or burned. Our lead removal work
- RRP rule
- The EPA Renovation, Repair and Painting rule, which requires certified firms and lead-safe work practices when paint is disturbed in homes and child-occupied facilities built before 1978. Certified renovators must contain the work area, may not burn paint off or power-sand without HEPA collection, and must clean and verify the area afterward. Lead removal service
Cal/OSHA asbestos standard (Title 8, Section 1529)
- Asbestos worker training
- Training required before asbestos work, scaled to the class of work: multi-day EPA-model courses for Class I and II, shorter courses for Class III, and awareness training for Class IV, with yearly refreshers. The EPA-model worker course runs 4 days with hands-on practice in a mock containment, and the yearly refresher is a full day.
- Asbestos-related work is any work that disturbs asbestos material; at 100 square feet or more, the employer needs Cal/OSHA registration and must notify Cal/OSHA. Abatement is the work aimed at the asbestos itself: removal, encapsulation or enclosure. Cal/OSHA registration is separate from CSLB licensing, and asbestos abatement in California needs both.
- Cal/OSHA asbestos job notification
- Written notice to the nearest Cal/OSHA district office at least 24 hours before registered asbestos-related work starts, naming the job address, dates and certified supervisor. It is separate from the air district notification. It is required when the job disturbs 100 square feet or more of asbestos-containing material, and the notice must be on file before crews start.
- Cal/OSHA asbestos registration
- Registration with Cal/OSHA’s Division of Occupational Safety and Health (DOSH) that an employer must hold before doing asbestos-related work involving 100 square feet or more of asbestos-containing material. It is renewed every year. Registration can be checked online through Cal/OSHA before a contract is awarded.
- Class I asbestos work
- The highest-risk category under Cal/OSHA: removing thermal system insulation and sprayed-on or troweled surfacing material, such as pipe lagging and fireproofing. It needs a negative pressure enclosure or another method Cal/OSHA allows, plus a competent person trained to the supervisor level.
- Class II asbestos work
- Removing asbestos material that isn’t thermal insulation or surfacing, such as floor tile, mastic, roofing, siding and transite. The standard sets specific steps for floor tile and roofing, such as keeping material wet and never sanding it.
- Class III asbestos work
- Repair and maintenance work where asbestos material is likely to be disturbed, such as cutting into a wall to reach a pipe. It is done wet with HEPA vacuums and, where material is cut, inside a glove bag or mini-enclosure.
- Class IV asbestos work
- Maintenance and custodial work that contacts asbestos without disturbing it, including cleanup of dust and debris from Class I to III work. Workers need at least 2 hours of asbestos awareness training.
- Competent person
- A person trained and authorized by the employer to identify asbestos hazards on site and correct them. Class I and II work requires one trained to the supervisor level. They inspect the work at least once each shift and must be able to stop it when a hazard appears.
- Disposable coveralls (Tyvek)
- Disposable coveralls with hoods and booties worn in asbestos and lead work areas and thrown away as contaminated waste. Wrists and ankles are often taped so dust can’t get inside, and coveralls come off in the equipment room of the decontamination unit.
- Excursion limit
- The short-term asbestos limit: 1.0 fiber per cubic centimeter of air, averaged over 30 minutes. It is 10 times the 8-hour limit, so a short dusty task can exceed it even when the daily average looks fine.
- Full-face air-purifying respirator
- A tight-fitting respirator covering the whole face with HEPA cartridges, assigned a protection factor of 50. It also protects the eyes. A protection factor of 50 covers exposures up to 5 fibers per cubic centimeter, 50 times the 8-hour limit.
- Half-face air-purifying respirator (APR)
- A tight-fitting respirator over the nose and mouth with HEPA cartridges, assigned a protection factor of 10. A protection factor of 10 covers exposures up to 1 fiber per cubic centimeter, 10 times the 8-hour limit.
- Initial exposure assessment
- The competent person’s judgment, at or before the start of a job, of how much asbestos workers are likely to breathe, which sets the controls and respirators required. Until data shows otherwise, Class I work and some Class II work are presumed to exceed the limit.
- Medical surveillance
- Medical exams the employer provides to asbestos workers before assignment, every year and at the end of employment. It applies to workers doing Class I to III work 30 or more days a year, or exposed above the limits. The exam includes a standard questionnaire and a lung function test, with a chest X-ray at the doctor’s discretion.
- Negative exposure assessment
- Documentation that exposure on a task will stay below the limits, based on objective data, monitoring from similar recent jobs, or initial air sampling. It can reduce respirator requirements. It must be redone when the task, material, crew or controls change.
- Permissible exposure limit (PEL)
- The most airborne asbestos a worker may be exposed to: 0.1 fiber per cubic centimeter of air, averaged over 8 hours. That is one fiber in every 10 cubic centimeters of air, a volume about the size of two teaspoons.
- Personal air monitoring
- Air samples collected by a pump worn in a worker’s breathing zone to measure that worker’s exposure. Workers must be told their results in writing, and the results are kept for decades as part of their exposure records.
- Powered air-purifying respirator (PAPR)
- A respirator with a battery-powered blower that pushes filtered air into a facepiece or hood. It protects more than an unpowered respirator and is easier to breathe in over a long shift. Cal/OSHA requires the employer to provide one instead of a negative-pressure respirator when a worker asks for it and it protects enough.
- Regulated area
- A marked-off work area where airborne asbestos may exceed the limit. Only trained, protected workers may enter, and warning signs are posted. Eating, drinking, smoking and chewing gum aren’t allowed inside it.
- Respirator fit test
- A test before a worker first wears a tight-fitting respirator, and every year after, that confirms the facepiece seals on that worker’s face. The test uses a taste or smell test agent, or a machine that counts particles inside and outside the mask.
- Supplied-air respirator
- A respirator fed clean air through a hose from a compressor or air tanks. Pressure-demand models keep air flowing outward if the seal leaks, which is why they’re used for the highest exposures.
Other Cal/OSHA standards
- Blood lead testing
- Blood tests that track how much lead a worker has absorbed. Cal/OSHA requires them for workers exposed above the action level and on higher-exposure trigger tasks. Workers must get their results in writing, and high results require removal from lead work with pay protection.
- DOSH (Division of Occupational Safety and Health)
- The state agency known as Cal/OSHA that enforces workplace safety in California. It registers asbestos contractors, certifies asbestos consultants and site surveillance technicians, and issues excavation and demolition permits.
- GHS labels and pictograms
- The standard label format and nine red-diamond hazard symbols used on chemical containers worldwide. The signal word is “Danger” for more severe hazards and “Warning” for less severe ones.
- Hazard Communication (HazCom)
- Cal/OSHA’s standard requiring labels, safety data sheets and worker training for hazardous chemicals on the job. California’s version is Title 8, Section 5194, and it covers chemicals every trade brings onto the job.
- Hot work permit
- A written permit for welding, cutting or grinding near flammable material, listing the fire precautions and a fire watch. A fire watch stays for a set time after the work ends to catch smoldering fires.
- IIPP (Injury and Illness Prevention Program)
- The written safety program every California employer must keep under Cal/OSHA, covering who is responsible, hazard inspections, accident investigation, training and correcting hazards. It is one of the standards Cal/OSHA cites most often.
- Lead action level
- The airborne lead level that triggers monitoring, medical surveillance and training under Cal/OSHA: 2 micrograms per cubic meter over 8 hours since January 1, 2025, down from 30. That is a 93 percent cut from the old level, so many more jobs now need air monitoring.
- Lead in construction (Section 1532.1)
- Cal/OSHA’s lead standard for construction, revised effective January 1, 2025. It covers any construction work that disturbs lead, sets an exposure limit of 10 micrograms per cubic meter of air, and requires written notice to Cal/OSHA at least 24 hours before trigger tasks. The new limit of 10 is one-fifth of the old limit of 50.
- Lockout/tagout (LOTO)
- Shutting off and locking out energy sources, such as power, gas and stored pressure, before work on equipment so nothing can start or release unexpectedly. Each worker puts on a personal lock, and only that worker removes it.
- Permit-required confined space
- A confined space with a serious hazard, such as bad air, engulfment or a shape that could trap someone. Entry needs a written permit, air testing, an attendant and a rescue plan. Cal/OSHA covers construction confined spaces in Title 8, Article 37 (Sections 1950 to 1962), and many vaults, tanks and manholes qualify.
- PPE Levels C and D
- Level C is a full-face air-purifying respirator with chemical-resistant clothing, used when the airborne hazard is known and can be filtered. Level D is a standard work uniform with no respiratory protection. Most tank and drum jobs start in Level D and step up to Level C when air readings call for it.
- Respirable crystalline silica (Section 1532.3)
- Cal/OSHA’s standard for silica dust in construction, which comes from cutting, drilling, grinding and breaking concrete, block and stone. Its exposure limit is 50 micrograms per cubic meter over 8 hours. Concrete gets its silica from the sand and rock in the mix, so nearly all cutting, coring and breaking falls under the standard.
- Safety Data Sheet (SDS)
- A 16-section document from the manufacturer describing a chemical’s hazards, safe handling, protective equipment and spill response. Employers must keep one on hand for every hazardous chemical and let workers see it during every shift.
- Table 1 silica controls
- The table in the silica standard that lists dust controls for common tasks, such as water-fed saws, shrouds with HEPA vacuums and wet core drills. Following it fully exempts the employer from air monitoring for that task. Following Table 1 doesn’t remove the need for a written exposure control plan.
Working safely around asbestos and lead
Who’s involved
Owners of buildings built before 1981 (for asbestos) or homes built before 1978 (for lead paint), facility managers, school districts, environmental consultants, and contractors whose work will disturb those materials.
What the work involves
These terms cover what asbestos and lead materials are, how they are tested, how removal is contained and cleared, and the Cal/OSHA standards that set worker training, exposure limits and job notifications.
Why it matters
Disturbing asbestos or lead without the required survey, notifications and controls can stop a project, expose workers and occupants, and bring penalties from Cal/OSHA and the air district. Survey results also decide what goes into a demolition bid.
Where it applies in Southern California
Much of Southern California’s housing and commercial building stock went up before these materials were phased out. In the South Coast district, Rule 1403 requires an asbestos survey before any demolition, and notification before demolition and before larger removals.
How SoCal Removal fits in
SoCal Removal has asbestos surveys done by independent consultants, has asbestos abatement performed by a Cal/OSHA (DOSH)-registered subcontractor, and completes the demolition that follows. Lead-safe renovation work is done under its EPA RRP firm certification, and lead abatement is done by CDPH-certified workers. See our asbestos service, lead removal and testing prices.
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