Owners/Operators must maintain records that demonstrate compliance with all tank closure requirements. Records of the results of the required site assessments must be maintained for at least three (3) years after completion of permanent closure or change in service in one of the following ways:

1. (1) By the owner or operator who took the UST system out of service.
2. (2) By the current owner or operator of the UST system site.
3. (3) Mailing these records to PSTD if they cannot be maintained at the closed facility.

Added at 23 Ok Reg 2261, eff 7-1-06

Amended at 25 Ok Reg 1867, eff 7-1-08