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0 9 requirements. 5. The protected and insulated AST systems shall have a thru-tank leak detector tube to allow for physical checkup and monitoring capability between the primary and the secondary containment. 6. The primary steel tank shall be pressurized at 5 psig during concrete encasement. 7. The outer surface of the primary steel tank shall be covered by a minimum of 1/4" thick (6.4 mm) Styrofoam insulation panels. 8. The secondary containment shall consist of a 30 NEI thick (0.76 mm) High -Density Polyethylene membrane enclosing the steel tank and insulation material. 9. The primary steel tank and the secondary containment shall be encased in six inches of monolithic reinforced concrete, with minimum design strength of 4,000 and 5,000 psi at 28 days depending on the tank size. The concrete design shall include the following for long-term durability: air entrainment, water reducing admixture, and steel reinforcement. Concrete encasements with seams will not be approved. 10. The protected and insulated AST systems shall be of concrete exterior and a continuous and visually verifiable monolithic (seamless) pour on top, bottom, ends, and sides and contain no cold joints or heat sinks (heat transfer points). The AST must be shop fabricated and tested in accordance with the LJL listings. Designs that use two layers of steel with insulation material between them will not be approved. Aboveground Storage Tanks Specifications Page 3 of 3 08/OM005 11. No steel or insulating material shall come in contact with the concrete or other corrosive material. 12. All openings shall be from the top only. 13. All exiposed metal with the excevtion of stainless steel must be,,00wder co,*eA • corrosion. 14. The protected and insulated AST systems shall include a 7 or 15 -gallon powder coated or stainless steel, UL listed spill containment, and shall include normally closed valve to release spilled product into the primary steel tank. Spill containment which route the spilled product into interstitial area will not be approved. 15. The protected and insulated AST systems shall have a coated concrete exterior to resist weather and reflect 16. The protected and insulated AST systems shall have a warranty of 30 years for systems 2,000 gallon capacity and larger and 20 years for systems 1,000 gallon capacity and smaller with optional 30 -year warranty. 17. The protected and insulated AST systems design shall have been in use for a minimum of ei liteen, )giears. The mam; rer • system failure in 28,000 units produced. 18. The protected and insulated AST systems shall have two (2) bolts for connecting grounding conductors for lightning protection in accordance with NFPA 780.