| (a) Owners and operators of aboveground storage tanks (AST)
and underground storage tank (UST) systems must contain and immediately clean
up a spill or overfill, report the spill or overfill to the agency within
24 hours, and begin corrective action in accordance with §§334.76-334.81
of this title (relating to Initial Response to Releases; Initial Abatement
Measures and Site Check; Site Assessment; Removal of Non-Aqueous Phase Liquids;
Investigation for Soil and Groundwater Cleanup; and Corrective Action Plan)
in the following cases:
(1) any spill or overfill of petroleum substance from an UST
or any spill or overfill of petroleum product from an AST that results in
a release to the environment that exceeds 25 gallons, or that causes a sheen
on nearby surface water; and
(2) any spill or overfill of a hazardous substance that results
in a release from an UST to the environment that equals or exceeds its reportable
quantity under the Comprehensive Environmental Response, Compensation, and
Liability Act (CERCLA) (40 Code of Federal Regulations (CFR) Part 302).
(b) Owners and operators must contain and immediately clean
up a spill or overfill of any petroleum substance from an UST or any petroleum
product from an AST that is less than 25 gallons. Owners or operators of USTs
must contain and immediately clean up a spill or overfill of a hazardous substance
that is less than the reportable quantity under CERCLA (40 CFR Part 302).
If cleanup cannot be accomplished within 24 hours, owners and operators must
immediately notify the agency.
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