40 CFR 280.51 : Protection Of Environment (§ 1.1 To Parts 1851-1899) — (Subparts A-B To Parts 293-299) — Environmental Protection Agency (Continued) (Subparts A-B To Parts 293-299) — Solid Wastes (Continued) (Subparts A-B To Parts 293-299) — Technical Standards And Corrective Action Requirements For Owners And Operators Of Underground Storage Tanks (Ust) (§ 280.10 To Appendix Iii To Part 280) — Release Reporting, Investigation, And Confirmation (§ 280.50 To § 280.53) — Investigation due to off-site impacts.

4 Aug 2016

When required by the implementing agency, owners and operators of UST systems must follow the procedures in § 280.52 to determine if the UST system is the source of off-site impacts. These impacts include the discovery of regulated substances (such as the presence of free product or vapors in soils, basements, sewer and utility lines, and nearby surface and drinking waters) that has been observed by the implementing agency or brought to its attention by another party.

40 CFR 280.51