StacksVerified U.S. regulatory reference

40 CFR §280.74

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Owners and operators must maintain records in accordance with § 280.34 that are capable of demonstrating compliance with closure requirements under this subpart. The results of the excavation zone assessment required in § 280.72 must be maintained for at least three years after completion of permanent closure or change-in-service in one of the following ways:
  1. (a)By the owners and operators who took the UST system out of service;
  2. (b)By the current owners and operators of the UST system site; or
  3. (c)By mailing these records to the implementing agency if they cannot be maintained at the closed facility.