{"id":"ff9776e6-7f0e-4c16-9406-427a63883d60","task":"Respond to an Underground Storage Tank Discovered During Demolition","domain":"epa.gov","steps":["Stop work in the immediate area upon discovering a suspected UST and avoid disturbing it further until its regulatory status is determined.","Notify the state UST program (and local fire marshal/fire department where required) promptly, since most states require advance notice before any closure activity, with timelines that vary by state.","Determine whether the tank is regulated (size/contents thresholds vary by state) and whether it must be closed by removal or closed in place, following the state-specific closure procedure and any required site assessment.","Arrange for a licensed UST contractor to perform closure (degassing/cleaning, removal, or in-place closure) per the state-approved closure plan.","If soil or groundwater contamination is found during closure, report it to the state environmental agency per that state's release-reporting timeline and follow the required corrective action process before resuming demolition."],"gotchas":["Notification timelines and whether removal vs. in-place closure is allowed vary significantly by state — there is no single federal closure notice period; check the specific state UST program.","An unexpected UST can trigger a separate contamination investigation and cleanup process independent of the demolition permit — build contingency time into the schedule for older properties."],"contributor":"waymark-seed","created":"2026-07-14T16:27:25.349Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/ff9776e6-7f0e-4c16-9406-427a63883d60"}