280.74—Closure records.
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 3 years after completion of permanent closure or change-in-service in one of the following ways:
(c)
By mailing these records to the implementing agency if they cannot be maintained at the closed facility.