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Understand NYC Regulatory Management for Local Laws
To determine whether a storage tank and/or its piping system are leaking. DEC requires using a test that can detect a tank or piping leak of 0.1 gallons per hour (gph) (with a probability of at least 95% and no more than 5% probability of false alarm.
Subpart 2 UST Suction inspection are every three (3) years, while Subpart 3 UST Systems are inspected Annually.
Compliance Monitored By
Subpart 2: USTs regulated by DEC and EPA
Subpart 3: USTs regulated by DEC only
The test(s) used must detect leaks from the entire tank system component. Tank tests must include the liquid-filled portion of the tank AND the vapor space above the petroleum, while piping tests must include all portions of underground piping (that routinely contain petroleum).
A failed tightness test indicates a suspected leak, which must be reported to the State Spill Hotline within two (2) hours by the tank owner or the tank operator.
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