S.D. Admin. R. 74:56:03:08
In accordance with § 74:56:03:04, existing AST systems may be upgraded to conform to new tank standards established in § 74:56:03:07.
Existing AST systems containing noncorrosive substances do not require internal coatings. Monitoring of the pH of the tank condensate is required biannually, not to exceed 7 1/2 months between sampling. A pH of 6.8 or higher shall be maintained. If the tank is internally coated or lined, biannual monitoring is not required. Owners or operators of an AST which cannot comply with this section may request a variance from the department by submitting justification for the variance. Criteria for granting the variance are the same as those listed in § 74:56:03:06.
S.D. Admin. R. 74:56:03:08
General Authority: SDCL 34A-2-93, 34A-2-101.
Law Implemented: SDCL 34A-2-100, 34A-2-101.