ATCP 93.350(3)(m)1.1. Storage tanks subject to scouring by the inflow of materials, or subject to wear from manual gauging shall be equipped with wear plates, diffusers, or other means to prevent localized wear or corrosion. ATCP 93.350(3)(m)2.2. If wear plates are used, they shall cover an area of at least one square foot and be installed in a manner that prevents crevice corrosion of the tank. ATCP 93.350(3)(n)(n) Explosion protection. Tanks shall be protected from explosion in accordance with generally accepted engineering practices. Protection shall be provided by cooling systems, fire-resistance measures, depressurizing valves, foundation sloping to prevent burning liquids from accumulating under the tank, or other means determined by a qualified engineer and acceptable to the department. ATCP 93.350(3)(o)(o) Protection from freezing. Tanks, piping, valves and other ancillary equipment shall be protected from physical damage by freezing. ATCP 93.350(4)(a)(a) General requirements. Piping systems serving hazardous substance storage tanks shall meet all of the following requirements: ATCP 93.350(4)(a)1.1. Piping systems shall be compatible with the substance stored and be protected from failure due to internal and external wear, vibration, shock, and corrosion. ATCP 93.350(4)(a)2.2. Piping systems shall be free of leakage, structurally sound, properly supported under all operating conditions and be protected from fire, heat, vacuum, and pressure that would cause the system to fail. ATCP 93.350(4)(a)3.3. Piping systems shall be designed, installed, and maintained to prevent damage from expansion, jarring, vibration, contraction, and frost. ATCP 93.350(4)(a)4.4. Piping systems shall be protected from collision damage or crushing loads by vehicles and equipment. ATCP 93.350(4)(a)5.5. Joint compounds and gaskets shall be compatible with the substance stored. ATCP 93.350(4)(a)6.6. Piping with pump or compressor connections shall be provided with shutoff valves located adjacent to the connections. ATCP 93.350(4)(a)7.7. Flexible connectors, elbows, loops, expansion chambers or similar measures shall be installed to allow for movement and prevent damage from water hammer. ATCP 93.350(4)(a)8.8. Piping systems that carry liquids which expand upon freezing shall be protected from freezing or shall have provisions to prevent rupture due to freezing. ATCP 93.350(4)(a)9.9. Refrigerated piping systems shall be constructed of materials suitable for extreme temperatures and pressures in the storage system. ATCP 93.350(4)(b)(b) National standards. Hazardous substance piping systems serving storage tanks shall be designed, constructed and installed or certified by a qualified engineer in accordance with a standard, as recognized by the department, that is developed by a nationally recognized association or independent testing laboratory. ATCP 93.350 NoteNote: Examples of recognized standards include ORD-C107.7 — Glass-Fibre Reinforced Plastic Pipe and Fittings; and ASTM D 2996 — Standard Specification for Filament-Wound “Fiberglass” (Glass-Fiber-Reinforced Thermosetting Resin) Pipe.
ATCP 93.350(5)(a)1.1. All new and existing tank systems used to store hazardous liquids shall be provided with secondary containment. ATCP 93.350(5)(a)2.2. Secondary containment systems shall be designed, constructed and installed to prevent the release of regulated substances to the environment at any time during the operational life of a tank system by containing a leak or spill from the system until the leak or spill is detected and removed. ATCP 93.350(5)(a)3.3. A building may serve as secondary containment if at least one of the following requirements is met: ATCP 93.350(5)(a)3.a.a. The building is an enclosed structure resting on or above impermeable surfaces from which a discharge of the entire contents of the largest tank would not escape through any doorway, floor drain or other means. ATCP 93.350(5)(a)3.b.b. The building drains and spillways are connected to an onsite wastewater treatment facility and are designed and maintained such that any leak or spill cannot drain elsewhere. ATCP 93.350(5)(a)3.c.c. The building drains and spillways are connected to a municipal wastewater treatment facility with agreement of the municipality on the specific materials stored, and drains and spillways are designed and maintained such that any leak or spill cannot drain elsewhere. ATCP 93.350(5)(a)4.4. Secondary containment systems shall be checked for evidence of a leak or spill at least every 30 days. ATCP 93.350(5)(a)5.5. Double-walled tanks shall be designed, constructed, and installed to contain a leak from any portion of the inner tank and to detect a failure of the inner or outer wall. ATCP 93.350(5)(a)6.6. Capacity requirements for secondary containment structures may be reduced by the amount of available treatment plant capacity that is directly accessible to the tank. ATCP 93.350(5)(a)7.7. Secondary containment, including liners and vaults, shall be designed, constructed, and installed to do all of the following: