Asbestos Registration - Cal/OSHA

Most asbestos rules are about how the work is done: containment, wetting, respirators, disposal. California adds rules about who is allowed to start it and who has to be told. Under Title 8, Sections 341.6 through 341.10, an employer doing asbestos-related work on 100 square feet or more of asbestos-containing material must hold a current registration from Cal/OSHA, send the nearest district office written notice before each job, post a warning sign at the work, and give its registration to the prime contractor and the other employers on site. This Cal/OSHA Asbestos Registration & Notification Toolbox Talk covers that paperwork chain and why it matters to everyone on the job, not only the abatement crew.

Where the boundary of this talk sits#

This talk covers California's registration, notification, and posting rules for asbestos-related work. Recognizing asbestos-containing materials and the health effects belong to the asbestos awareness talk; respirators belong to the respiratory protection talk; demolition sequencing belongs to the demolition talk.

The anchor#

Here is the distinction that carries this whole talk: in California the asbestos rules start before the first tile is pried up — at 100 square feet or more of asbestos-containing material, the employer must already hold a Cal/OSHA registration, must have told the district office in writing where, when, who is supervising, and how the work will be done, and must have handed its registration to the prime contractor and the other trades — so the question for every crew on a renovation or demolition job is not just "is there asbestos?" but "has the registered contractor already been through the paperwork that says it's being handled?"; if nobody can show it, nobody should be disturbing that material.

What counts#

Section 341.6 defines asbestos-related work as any activity that, by disturbing asbestos-containing construction materials, may release asbestos fibers into the air, other than work related to manufacturing, mining, or automotive material installation and repair. Asbestos-containing construction material is any manufactured construction material that contains more than one-tenth of one percent asbestos by weight.

That definition is about disturbance: cutting, drilling, sanding, scraping, breaking, or removing the material — whether by an abatement crew or a plumber cutting through a wall.

Registration at 100 square feet#

Section 341.6(a) says an employer who will engage in asbestos-related work involving 100 square feet or more of surface area of asbestos-containing material must apply for and obtain a registration from the Division before starting any such work. The registration is valid for one year after issuance.

Subsection (e) sets how the 100 square feet is computed. It does not add together work of less than 100 square feet done at separate, unrelated worksites, and it excludes routine and continuing maintenance and repair of existing fixtures or machinery where each component of the work involves less than 100 square feet. Outside those exceptions, a job at or above 100 square feet needs a registered employer.

Section 341.7 sets what an employer must show to be registered: proof of certification where required under Business and Professions Code Section 7058.5 for contractors; health insurance covering medical examinations and monitoring, or a trust account for each employee doing the work, plus workers' compensation coverage; proof that all training and certification requirements for employees doing asbestos-related work have been completed; and proof that the employer understands the applicable standards and has the equipment and proficiency to do the work safely. Renewal applications are due no later than 30 days before the registration expires.

Written notice before each job#

Section 341.9(a) requires written notice to the nearest Cal/OSHA district office before the work starts when a registered employer conducts separate jobs or phases of work, or where the work process may differ or is performed at noncontiguous locations. The notice includes:

• the job address and precise physical location of the work;
• the projected starting and completion dates;
• the name of the certified supervisor with sufficient experience and authority for the job;
• the name of the qualified person responsible for air sampling, equipment calibration, evaluating results, and respirator fit testing; and
• a description of the type of work, the work practices to be used, and an evaluation of the potential for exposure.

Where circumstances require immediate abatement action, the employer must immediately notify the nearest district office by telephone or otherwise orally of the start of work, and confirm it in writing no later than 24 hours afterward. Any change in the information given must be reported at or before the time of the change and confirmed in writing no later than 24 hours after the change.

The certified supervisor named in that notice is the person the crew should know by name on an asbestos job.

Posting and telling the other trades#

Section 341.10(a) requires the employer to post a sign, readable at 20 feet, at the location where registered asbestos-related work is to take place, stating: "Danger-Asbestos. Cancer and Lung Hazard. Keep Out."

Section 341.10(b) requires the employer to give a copy of its registration to the prime contractor and the other employers at the site before any asbestos-related work begins, and to post a copy of the registration at the jobsite beside the Cal/OSHA poster.

That second requirement is how the rest of the site finds out. The electrician, the framer, and the laborer who never touch the asbestos still work next to it, and the registration posted beside the Cal/OSHA poster tells them someone registered is responsible for that work.

Where the duty sits#

8 CCR 341.6 requires registration for asbestos-related work on 100 square feet or more and defines the terms. 8 CCR 341.7 sets what the employer must prove to be registered and the renewal deadline. 8 CCR 341.9 requires written notice to the district office before the work starts and when information changes. 8 CCR 341.10 requires the warning sign and giving and posting the registration.

What can go wrong?#

• A renovation crew removes 300 square feet of floor tile that tested positive, and the employer has no registration.
• A registered contractor starts a new phase at a different building without sending a new notice.
• The warning sign is at the building entrance but not where the removal is happening.
• The other trades never get a copy of the registration and don't know asbestos work is underway.
• An electrician drills into material marked "suspect" because "the abatement guys already did this floor."

How do we manage this properly?#

• Know the material first — test suspect material before disturbing it.
• Registration at 100 square feet — current, before the work starts.
• Written notice to the district office — before each job or phase, with the certified supervisor and the qualified person named.
• Update changes at or before the change — confirmed in writing within 24 hours.
• Post the sign at the work — "Danger-Asbestos. Cancer and Lung Hazard. Keep Out," readable at 20 feet.
• Share and post the registration — with the prime contractor and other employers, and beside the Cal/OSHA poster.
• Other trades stay out — until the registered contractor says the area is clear.

Before you start#

If today's work touches old flooring, pipe insulation, drywall joint compound, ceiling materials, roofing, or other building materials that might contain asbestos, ask whether they have been tested. If asbestos-related work is planned or underway, find the registration beside the Cal/OSHA poster and the sign at the work area.

Talk it over#

• What materials on this job could contain asbestos?
• Where is the asbestos contractor's registration posted?
• Who is the certified supervisor for the asbestos work, and how would you reach them?

The bottom line#

In California, asbestos-related work on 100 square feet or more of asbestos-containing material requires a current Cal/OSHA registration, written notice to the nearest district office before each job, a "Danger-Asbestos. Cancer and Lung Hazard. Keep Out." sign readable at 20 feet at the work, and a copy of the registration for the prime contractor, the other employers, and the posting board. If nobody can show that paperwork, nobody should be disturbing the material.

Frequently asked questions about Cal/OSHA asbestos registration#

When does an employer need a Cal/OSHA asbestos registration?

Under Section 341.6(a), before starting asbestos-related work involving 100 square feet or more of surface area of asbestos-containing material. Asbestos-containing construction material means material containing more than one-tenth of one percent asbestos by weight. The registration is valid for one year.

Does every job need a new notice to Cal/OSHA?

Section 341.9(a) requires written notice to the nearest district office before the work starts when the registered employer conducts separate jobs or phases of work, or where the work process may differ or is performed at noncontiguous locations. Emergency abatement allows immediate oral notice, confirmed in writing within 24 hours.

Download the Cal/OSHA asbestos registration toolbox talk PDF#

Download this Cal/OSHA Asbestos Registration & Notification Toolbox Talk as a printable PDF in English and Spanish, and review it before any renovation or demolition work begins.

Related toolbox talks#

• Asbestos Awareness
• Demolition Safety
• Respiratory Protection
• Hazard Communication

Sources#

• Cal/OSHA, Title 8 CCR §341.6 — Registration Requirements ((a) registration before asbestos-related work involving 100 sq ft or more of asbestos-containing material, valid one year; (b) definition of asbestos-related work; (c) definition of asbestos-containing construction material, more than 1/10 of 1% asbestos by weight; (e) computation, separate unrelated worksites, routine maintenance exception): https://www.dir.ca.gov/title8/341_6.html
• Cal/OSHA, Title 8 CCR §341.7 — Application for Registration and Renewal of Registration ((b) certification under Bus. & Prof. Code §7058.5, health insurance or trust account and workers' compensation, employee training and certification, knowledge and proficiency; (c) renewal no later than 30 days before expiration): https://www.dir.ca.gov/title8/341_7.html
• Cal/OSHA, Title 8 CCR §341.9 — Notification to the Division — Asbestos-Related Work ((a) written notice to the nearest district office before work begins, contents, emergency oral notice confirmed in writing within 24 hours, changes reported at or before the change): https://www.dir.ca.gov/title8/341_9.html
• Cal/OSHA, Title 8 CCR §341.10 — Posting and Notification — Asbestos-Related Work ((a) sign readable at 20 feet: "Danger-Asbestos. Cancer and Lung Hazard. Keep Out."; (b) registration to prime contractor and other employers, posted beside the Cal/OSHA poster): https://www.dir.ca.gov/title8/341_10.html

Written by FieldSafetyTalk's safety professional — a CSP, ASP, CHST and OSHA Authorized Outreach Trainer with 14+ years of international construction safety experience across federal, heavy civil, and industrial projects.

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