Gas Station

Relevant evidence may include delivery tickets, tank capacity and inventory immediately before delivery, automatic tank-gauge records, overfill alarms or shutoff information, spill-containment conditions, surveillance video, driver or employee records, and documentation of any fuel observed afterward. EPA's federal UST rules generally require applicable spill and overfill prevention measures, subject to specified exceptions, and require proper filling practices that include confirming sufficient available tank capacity and continuously monitoring the transfer.

A suitably qualified gas station expert can compare fuel purchased and delivered with tank inventory and volumes recorded through dispensers over the same period. Tank-gauge readings, reconciliation reports, meter or dispenser records, calibration and maintenance information, alarms, and timing of repairs may help determine whether the apparent loss reflects a release, measurement problem, equipment issue, or another discrepancy. EPA specifically recognizes inventory-control discrepancies as one potential warning sign of a UST release.

A gas station expert can evaluate how fuel was received, stored, monitored, and dispensed and what the operating records show. A confirmed subsurface release may require environmental or contamination expertise; a tank- or piping-specific failure may require specialized UST-system, engineering, testing, or equipment expertise; and a fire or explosion may require qualified origin-and-cause analysis. The disciplines should be matched to the actual disputed issue rather than assuming one expert covers every consequence of a gas-station incident.