Leak Detection

Release detection requirements differ between petroleum USTs and hazardous waste USTs. Petroleum UST systems may choose from among five primary release detection methods, for example: 1) automatic tank gauging that tests for product loss and conducts inventory control; 2) testing or monitoring for vapor within the soil gas of the tank area; and 3) testing or monitoring for liquids in the ground-water. Hazardous substance tanks must use secondary containment systems such as double-walled tanks or external liners, unless the owner has obtained a variance.

Owners must maintain records pertaining to: system leak detection methods; recent test results to detect possible leaks; and maintenance of release detection equipment; and must make these available to the agency on request. Information on leak detection method(s) used by UST systems is also on the notification form on file in each state's UST office.

These leak detection standards apply to new UST systems.

TABLE 11.19.1 MINIMUM REQUIREMENTS FOR COMPLIANCE WITH UST REGULATIONS (EPA)

Leak Detection

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