Asbestos Programs


The Butte County Air Quality Management District (District) is proposing adoption of a new regulation, Rule 270–Asbestos Demolition and Renovation to limit the emissions of asbestos to the atmosphere and require appropriate work practice standards and waste disposal procedures for all renovations or demolitions and asbestos waste disposal sites within the District unless exempted by the Rule.  This regulation is currently enforced by the California Air Resources Board (CARB).  The adoption of this rule will transfer the responsibility of oversight locally to the District.

Rule 270—Asbestos Demolition and Renovation will provide the District with the authority to enforce the Asbestos NESHAP ATCM requirements and the District will apply for delegation from the federal EPA after adoption of the regulations.  Rule 516- Asbestos Demolition/Renovation Fees is proposed to cover the estimated reasonable costs of review, inspection, and monitoring related to the implementation of Rule 270.

The proposed rules are available to view and download on the District website.  The URL is: or contact Ursula Parker at 530-332-9400 extension 104 or

Please email to be included in further correspondence regarding the development and adoption of these rules.  Thank you.

Asbestos Program for Renovations and Demolitions

The California Air Resources Board (CARB) is responsible for overseeing compliance with the federal Asbestos National Emission Standards for Hazardous Air Pollutants (NESHAPs) in Butte County. The District is not delegated to implement this program.  For more information and to provide written notification of renovation and/or demolition activities, please go CARB’s Asbestos NESHAP Program webpage. or contact CARB at

Naturally-Occuring Asbestos (NOA)

Naturally-occurring asbestos may be found in at least 44 of California’s 58 counties, including Butte County. Asbestos is a naturally occurring fiber which is commonly found in ultramafic rock.  The asbestos fibers are released into the air when they are broken or crushed through man-made or natural processes. Asbestos has been identified by the State as a toxic air contaminant. Inhalation (breathing) is the main route of exposure and may cause lung cancer or cause other health hazards which may not become apparent until after many years.

Naturally-occurring asbestos, often found in serpentine rock formations, is present in foothill areas of Butte County. See this map for areas within Butte County with known formations that may contain naturally-occurring asbestos. Contact the District if you require more detailed information such as .kml or .shp files can be used in geospatial programs. The Butte County Air Quality Management District (District) implements the requirements of State’s Airborne Toxic Control Measures (ATCMs) for NOA.

In summary of the ATCMs requirements, if NOA is discovered prior to or when performing cleanup activities, owners/contractors must notify the District by the next business day and implement dust mitigation measures within 24-hours. The following dust mitigation measures are required during any construction or grading activities subject to this ATCM, regardless of work area size:

  • Construction vehicle speeds at the work site must be fifteen (15) miles per hour or less;
  • Prior to any ground disturbance and during work activities, sufficient water must be applied to the area to be disturbed to prevent visible dust from crossing the property line;
  • Storage piles must be kept adequately wetted, treated with a chemical dust suppressant, or covered when material is not being added to or removed from the pile;
  • Equipment must be washed down before moving from the property onto a paved public road; and,
  • Visible track-out on the paved public road must be cleaned using wet sweeping or a HEPA filter equipped vacuum device within twenty-four (24) hours.

Although there is an exemption for owners and tenants working on their own properties disturbing one (1) acre or less, following the control measures above is strongly recommended to protect public health.

The  two Asbestos ATCMs contains the specific requirements for various earthwork and aggregate operations.  The Asbestos ATCM for Construction, Grading, Quarrying, and Surface Mining ( requires the implementation of mitigation measures to minimize emissions of asbestos-laden dust. The Asbestos ATCM for Surface Applications ( restricts the asbestos content of material used in surfacing applications such as unpaved roads, parking lots, driveways, and walkways.

Additional information is available from the following websites:

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