S.D. Admin. R. 74:56:03:11
Secondary containment systems required in accordance with § 74:56:03:04 must be installed under and around any new AST system. The secondary containment system may consist of a combination of double-walled tanks and bottoms, dikes, liners, pads, ponds, impoundments, curbs, ditches, sumps, receiving tanks, or other equipment capable of containing the regulated substance stored. Construction of diking must be in accordance with professional engineering practices. Plans and specifications for the secondary containment systems must be submitted for approval by the department at least 30 days before construction of the system.
Secondary containment around and under the AST system shall consist of native soils, clays, bentonites, or artificially constructed material equivalent to 60 mil high-density polyethlene or greater. An impermeability of at least 10-6 centimeter per second is required to permit containment and detection of a release. Secondary containment must be constructed and maintained to meet impermeability requirements for the operational life of the AST system.
Secondary containment other than double walls or bottoms must be capable of containing 110 percent of the volume of the largest tank in the facility. Secondary containment must be compatible with the regulated substance stored. Secondary containment must be designed and installed to control storm water. Storm water or any containment discharge from an AST system may be subject to the provisions of the surface water discharge permit regulations, chapters 74:52:01 to 74:52:11, inclusive.
S.D. Admin. R. 74:56:03:11
General Authority: SDCL 34A-2-93, 34A-2-101.
Law Implemented: SDCL 34A-2-100, 34A-2-101.