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Hazardous Waste Tank System Requirements for LQGs and Onsite Treatment Facilities —Page 5 of 14 • Visual monitoring during hours of operation. 8. Secondary Containment Exceptions3 — The following equipment is exempted from 22 CCR secondary containment provisions provided that the equipment is visually inspected for leaks on a daily basis:4 ➢ Aboveground piping runs (except for valves, flanges,joints, and connections); [22CCR§66265.193(f)(1)] ➢ Welded flanges, welded joints, and welded connections; [22CCR§66265.193(f)(2)] ➢ Sealless or magnetic coupling pumps and sealless valves; [22CCR§66265.193(f)(3)] ➢ Pressurized aboveground piping systems with automatic shut-off devices (e.g., excess flow check valves, flow metering shutdown devices, loss of pressure actuated shut-off devices). [22CCR§66265.193(1)(4)] Tank systems used to transfer, store or treat hazardous waste containing no free liquids and that are situated inside a building with an impermeable floor are exempted from the requirements of 22 CCR §66265.193.5 [22CCR§66265.190(a)] Tank systems and sumps that serve as part of a secondary containment system to collect or contain releases of hazardous wastes are exempted from the requirements of 22 CCR §66265.193(a). [22CCR§66265.190(b)] Unless otherwise required by federal law, the requirements of 22 CCR §66265.193 do not apply to Conditional Exemption (CE) or Conditionally Authorized (CA) on-site treatment tank system ancillary equipment if- The £The equipment's integrity is attested to pursuant to 22 CCR §66265.191 every 2 years from the date that retrofitting requirements would otherwise apply; [HSC§§25200.3(c)(4)(A)or 25201.5(e)(1)]or ➢ It is not feasible for the equipment to undergo integrity testing and the operator implements the best feasible leak detection measures determined to be sufficient by DTSC, and those measures do not reveal any leaks. [HSC§§25200.3(c)(4)(B)(ffi)and 25201.5(e)(2)(C)] Any CE or CA tank system ancillary equipment found to leak must be retrofitted by the operator to meet full secondary containment standards. [HSC§§25200.3(c)(4)(B)(ffi)and 25201.5(e)(2)(C)] A Spill Prevention and Overfill Prevention Controls Tanks must be provided with the following: [22 CCR§66265.194(b)] ❑ Spill prevention controls (e.g., check valves, dry disconnect couplings); ❑ Overfill prevention controls (e.g., level-sensing devices, high level alarms, automatic feed cutoff, bypass to a standby tank); ❑ In the case of uncovered tanks, at least 2 feet of freeboard to prevent overtopping by wave or wind action or by precipitation.6 3 Local ordinances or codes may require secondary containment of these systems even if it is not required by 22 CCR. Check with your CUPA. 4 These inspections must be documented as required by 22 CCR§66265.195(c). 5 To demonstrate the absence or presence of free liquids in the waste, Method 9095 (Paint Filter Liquids Test) as described in"Test Methods for Evaluating Solid Wastes, Physical/Chemical Methods" (EPA Publication No. SW-846, 3rd edition and Updates incorporated by reference in§66260.11)must be used. 6 This requirement does not apply if the tank is equipped with a containment structure (e.g., dike, trench, etc.), drainage control system,or diversion structure(e.g.,standby tank)with a capacity equal to or greater than the volume of the top 2 feet of the tank. UN-047-5/14 www.unidoes.org Rev.01/07/08