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AB-28 • 2026

Solid waste landfills: subsurface temperatures.

Solid waste landfills: subsurface temperatures.

Budget Education Energy
Passed Legislature

This bill passed both chambers and reached final enrollment, even if later executive action is not shown here.

Sponsor
Schiavo
Last action
2025-09-08
Official status
Ordered to inactive file at the request of Senator Blakespear.
Effective date
Not listed

Plain English Breakdown

The exact criteria for additional actions are yet to be established by CalRecycle through emergency regulation.

Solid Waste Landfills: Subsurface Temperatures

This law requires operators of municipal solid waste landfills to monitor gas temperatures and take corrective actions if certain temperature thresholds are exceeded, with penalties for non-compliance.

What This Bill Does

  • Requires the State Air Resources Board to set rules for monitoring landfill gas temperatures in MSW landfills.
  • Mandates that MSW landfill operators must report gas temperatures above 131 degrees Fahrenheit and take corrective actions if needed.
  • Imposes penalties on operators who do not comply with reporting requirements or fail to implement corrective measures.

Who It Names or Affects

  • Operators of municipal solid waste landfills
  • Local enforcement agencies and the Department of Resources Recycling and Recovery (CalRecycle)

Terms To Know

Municipal Solid Waste Landfill (MSW landfill)
A facility designated for the disposal of everyday household waste.
Corrective Action Plan
A plan developed to address and fix issues related to high gas temperatures in landfills.

Limits and Unknowns

  • The bill does not specify an effective date.
  • It is unclear how the penalties will be enforced or collected.

Bill History

  1. 2025-09-08 California Legislative Information

    Ordered to inactive file at the request of Senator Blakespear.

  2. 2025-09-04 California Legislative Information

    Read second time. Ordered to third reading.

  3. 2025-09-03 California Legislative Information

    Read third time and amended. Ordered to second reading.

  4. 2025-08-29 California Legislative Information

    Read second time. Ordered to third reading.

  5. 2025-08-29 California Legislative Information

    From committee: Do pass. (Ayes 5. Noes 2.) (August 29).

  6. 2025-08-18 California Legislative Information

    In committee: Referred to suspense file.

  7. 2025-07-18 California Legislative Information

    Read second time and amended. Re-referred to Com. on APPR.

  8. 2025-07-18 California Legislative Information

    From committee: Amend, and do pass as amended and re-refer to Com. on APPR. (Ayes 7. Noes 0.) (July 16).

  9. 2025-07-03 California Legislative Information

    From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on E.Q.

  10. 2025-06-27 California Legislative Information

    In committee: Set, first hearing. Hearing canceled at the request of author.

  11. 2025-06-11 California Legislative Information

    Referred to Com. on E.Q.

  12. 2025-05-29 California Legislative Information

    In Senate. Read first time. To Com. on RLS. for assignment.

  13. 2025-05-29 California Legislative Information

    Read third time. Passed. Ordered to the Senate. (Ayes 56. Noes 9. Page 1775.)

  14. 2025-05-27 California Legislative Information

    Read second time. Ordered to third reading.

  15. 2025-05-23 California Legislative Information

    From committee: Do pass. (Ayes 11. Noes 3.) (May 23).

  16. 2025-05-14 California Legislative Information

    In committee: Set, first hearing. Referred to suspense file.

  17. 2025-05-07 California Legislative Information

    Re-referred to Com. on APPR.

  18. 2025-05-06 California Legislative Information

    Read second time and amended.

  19. 2025-05-05 California Legislative Information

    From committee: Amend, and do pass as amended and re-refer to Com. on APPR. (Ayes 11. Noes 3.) (April 28).

  20. 2025-03-25 California Legislative Information

    Re-referred to Com. on NAT. RES.

  21. 2025-03-24 California Legislative Information

    From committee chair, with author's amendments: Amend, and re-refer to Com. on NAT. RES. Read second time and amended.

  22. 2025-03-24 California Legislative Information

    Referred to Com. on NAT. RES.

  23. 2024-12-03 California Legislative Information

    From printer. May be heard in committee January 2.

  24. 2024-12-02 California Legislative Information

    Read first time. To print.

Official Summary Text

AB 28, as amended, Schiavo.
Solid waste landfills: subsurface temperatures.
(1) The California Integrated Waste Management Act of 1989, administered by the Department of Resources Recycling and Recovery (CalRecycle), generally regulates the disposal, management, and recycling of solid waste, as defined. The act authorizes CalRecycle to certify a local enforcement agency and requires CalRecycle and certified local enforcement agencies to perform specified functions with regard to the regulation of solid waste management, including issuing and enforcing solid waste facility permits. The act prohibits a person from operating a solid waste facility without a solid waste facilities permit, as provided.
The California Global Warming Solutions Act of 2006 charges the State Air Resources Board with monitoring and regulating sources of emissions of greenhouse gases that cause global warming in order to
reduce emission of greenhouse gases. The act requires the state board to adopt rules and regulations to achieve the maximum technologically feasible and cost-effective greenhouse gas emissions reductions, as provided.
This bill would require the state board to amend its regulations on methane emissions from a municipal solid waste landfill (MSW landfill) to establish requirements for the monitoring of landfill gas temperature. The bill would require the operator of an MSW landfill to monitor landfill gas temperature in accordance with those regulations. If the gas temperature is 131 degrees Fahrenheit or higher for longer than
2
3
consecutive monthly monitoring periods covering 60 consecutive days, and if other criteria established by CalRecycle are
met,
met or exceeded,
the bill would require the operator of the MSW landfill to take specified actions, including, but not limited to,
working collaboratively with CalRecycle and the local enforcement
agency, as defined, to develop and implement
filing
a corrective action
plan.
plan for review by the local enforcement agency, as defined, and the department.
If the gas temperature is 146 degrees Fahrenheit or higher for longer than
2
3
consecutive monthly monitoring periods covering 60 consecutive days, and if other criteria established by CalRecycle are
met,
met or exceeded,
the bill would require additional actions, including, but not limited to, the
California Environmental Protection Agency (CalEPA) forming
operator of the MSW landfill submitting corrective action plans to
a multiagency coordination
group to collaborate with the operator of the MSW landfill to develop and implement another corrective action plan,
group, established by the California Environmental Protection Agency (CalEPA),
as specified. If the gas temperature is
162
170
degrees Fahrenheit or higher for longer than
2
3
consecutive monthly monitoring periods covering 60 consecutive days, and if other criteria established by CalRecycle are
met,
met or exceeded,
the bill would require additional actions, as specified. The bill would require CalRecycle to establish the other criteria by emergency regulation.
If an operator of an MSW landfill fails to provide notice of a sustained gas temperature by the specified due date, the bill would authorize CalRecycle or a local enforcement agency to impose a penalty of $10,000 per day. The bill would require CalRecycle or a local enforcement agency to impose a penalty not to exceed $1,000,000 for each week that the gas temperature is
162
170
degrees Fahrenheit or higher for longer than
2
3
consecutive monthly monitoring periods covering 60 consecutive days, if specified criteria are
met.
met or exceeded.
The bill would require all penalties to be deposited into the Landfill Subsurface Fire Mitigation Account, which the bill would create, to be used upon appropriation by the Legislature to mitigate harm to a person or community adversely affected by a solid waste landfill with a gas temperature of 131 degrees Fahrenheit or higher for longer than
2
3
consecutive monthly monitoring periods covering 60 consecutive days. The bill would require any permit suspended pursuant to these
provisions to be reinstated when, among others, gas temperature decreases to below 131 degrees Fahrenheit for 3 consecutive monthly monitoring periods covering 60 consecutive days or longer, as specified.
This bill would make an operator of an MSW landfill liable to CalRecycle and the local enforcement agency for their costs, as specified. The bill would exempt from the Administrative Procedure Act specified requirements that the bill authorizes CalRecycle to impose on the operator of an MSW landfill. By creating new duties for a local enforcement agency, the bill would impose a state-mandated local program.
Existing federal regulations require the owner of an MSW landfill with a gas collection and control system to operate each interior wellhead in the collection system with a landfill gas temperature less than 131 degrees Fahrenheit, unless the federal Environmental Protection Agency approves a higher operating
temperature, as provided.
This bill would require an operator of an MSW landfill to provide notice to the local enforcement agency, CalRecycle, and any other state agency designated by CalEPA regarding a request for a higher operating temperature, as specified.
(2) This bill would declare its provisions to be severable.
(3) The California Constitution requires the state to reimburse local agencies and school districts for certain costs mandated by the state. Statutory provisions establish procedures for making that reimbursement.
This bill would provide that, if the Commission on State Mandates determines that the bill contains costs mandated by the state, reimbursement for those costs shall be made pursuant to the statutory provisions noted above.

Current Bill Text

Read the full stored bill text
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