California Leak Detection regulations & environmental compliance analysis

California Leak Detection: What you need to know

Governing Law and Regulations

Hazardous waste treatment, storage, and disposal facilities (TSDFs): 22 California Code of Regulations (CCR) 66264

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Underground storage tanks (USTs): California Health & Safety Code (CH & SC) 25280 to 25299.7

Aboveground storage tanks (ASTs): CH & SC 25270 to 25270.13

Regulatory Agencies

California Environmental Protection Agency (Cal/EPA) Department of Toxic Substances Control (DTSC)

State Water Resources Control Board (SWRCB) Division of Water Quality

Local city and county authorities

U.S. Environmental Protection Agency (EPA) Region 9

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. California has adopted the federal leak detection rules and added several more stringent requirements. The specific leak detection system standards vary, depending on the type of unit or facility.

Refer to the national section LEAK DETECTION for a review of general and federal leak detection requirements.

Administration and enforcement. Cal/EPA's DTSC, the SWRCB, and various county and municipal agencies administer and enforce California's leak detection requirements.

State Requirements


Landfills and surface impoundments. All hazardous waste landfills and surface impoundments must have a leak detection system as part of their liner system. See the state sections LANDFILLS and SURFACE IMPOUNDMENTS for additional guidance.

Hazardous waste storage tanks. A leak detection system on a hazardous waste storage tank is referred to as secondary containment. In addition, to ensure that hazardous waste stored in tanks does not contribute to air pollution, the U.S. Environmental ...

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California Leak Detection Resources

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