- (a) When directed by PSTD, the owner/operator of an underground storage tank system closed before April 21, 1989 must assess the excavation zone and close the underground storage tank system in accordance with this Chapter. PSTD may direct the owner/operator to assess the site or may assess the site itself if a potential for a suspicion of release from the underground storage tank system may, in the judgment of PSTD, pose a current or potential threat to human health, safety or the environment.
- (b) Petroleum storage tank systems closed after April 21, 1989 and not upgraded to meet December 23, 1998 upgrade deadline must be removed and the site assessed in accordance with 165:25-2-136 of Commission rules.
Added at 23 Ok Reg 2261, eff 7-1-06
Amended at 25 Ok Reg 1867, eff 7-1-08
Amended at 32 Ok Reg 780, eff 8-27-15