The Leaking Underground Storage Tank (LUST) program is specific to unauthorized releases associated with petroleum underground storage tank systems.

Alameda County Environmental Health Department (ACEHD) oversees the investigation and cleanup of petroleum releases from underground storage tanks (USTs) in unincorporated Alameda County and the cities of Alameda, Albany, Castro Valley, Dublin, Emeryville, Livermore, Oakland, Piedmont, Pleasanton, San Lorenzo, and Sunol under the Local Oversight Program (LOP) contract with the State Water Board (SWB). In certain circumstances, ACEHD may oversee cases in Berkeley, Hayward, Fremont, Newark, San Leandro, and Union City with Regional Water Quality Control Board concurrence.

Sites are entered into the LOP when a release from a UST is reported and confirmed. This typically occurs during UST removal when evidence of a release is observed or confirmed through soil or groundwater sample analytical results. Releases are also reported when contamination is identified during repairs to fuel delivery systems associated with USTs or during environmental site assessments conducted as part of property transactions.