Section NR 662.194 - Special requirements for accumulating in tanks(1) APPLICABILITY. The requirements of this section apply to small quantity generators who accumulate hazardous waste in tanks for less than 180 days (or 270 days if the generator must ship the waste greater than 200 miles) and do not accumulate over 6,000 kg (13,230 pounds) on-site at any time.(2) GENERAL OPERATING REQUIREMENTS. Generators shall comply with all of the following requirements: (a) Treatment or storage of hazardous waste in tanks shall comply with s. NR 665.0017(2).(b) Hazardous wastes or treatment reagents may not be placed in a tank if they could cause the tank or its inner liner to rupture, leak, corrode or otherwise fail before the end of its intended life.(c) Uncovered tanks shall be operated to ensure at least 60 centimeters (2 feet) of freeboard, unless the tank is equipped with a containment structure (e.g., dike or trench), a drainage control system or a diversion structure (e.g., standby tank) with a capacity that equals or exceeds the volume of the top 60 centimeters (2 feet) of the tank.(d) Where hazardous waste is continuously fed into a tank, the tank shall be equipped with a means to stop this inflow (e.g., waste feed cutoff system or by-pass system to a stand-by tank). Note: These systems are intended to be used in the event of a leak or overflow from the tank due to a system failure (e.g., a malfunction in the treatment process, a crack in the tank, etc.).
(3) INSPECTIONS. Except as noted in sub. (6), generators shall inspect all of the following, where present:(a) Tank discharge control equipment (e.g., waste feed cutoff systems, by-pass systems and drainage systems) at least once each operating day, to ensure that it is in good working order.(b) Data gathered from monitoring equipment (e.g., pressure and temperature gauges) at least once each operating day to ensure that the tank is being operated according to its design.(c) The level of waste in the tank at least once each operating day to ensure compliance with sub. (2) (c).(d) The construction materials of the tank at least weekly to detect corrosion or leaking of fixtures or seams.(e) The construction materials of, and the area immediately surrounding, tank discharge confinement structures (e.g., dikes) at least weekly to detect erosion or obvious signs of leakage (e.g., wet spots or dead vegetation). Note: As required by s. NR 665.0015(3), the owner or operator shall remedy any deterioration or malfunction found.
(6) CLOSURE. Generators shall, upon closure of the facility, remove all hazardous waste from tanks, discharge control equipment and discharge confinement structures. Note: At closure, as throughout the operating period, unless the owner or operator can demonstrate, in accordance with s. NR 661.03(3) or (4), that any solid waste removed from the tank is not a hazardous waste, the owner or operator becomes a generator of hazardous waste and shall manage it in accordance with all applicable requirements of chs. NR 662, 663 and 665.
(7) SPECIAL REQUIREMENTS FOR IGNITABLE OR REACTIVE WASTES. Generators shall comply with all of the following requirements: (a) Ignitable or reactive waste may not be placed in a tank, unless subd. 1., 2. or 3. applies: 1. The waste is treated, rendered or mixed before or immediately after placement in a tank so that all of the following apply:a. The resulting waste, mixture or dissolution of material no longer meets the definition of ignitable or reactive waste under s. NR 661.21 or 661.23.b. Section NR 665.0017(2) is complied with.2. The waste is stored or treated in such a way that it is protected from any material or conditions that may cause the waste to ignite or react.3. The tank is used solely for emergencies.(b) The owner or operator of a facility which treats or stores ignitable or reactive waste in covered tanks shall comply with the buffer zone requirements for tanks contained in Tables 2-1 to 2-6 of the "National Fire Protection Association's Flammable and Combustible Liquids Code" (1977 or 1981), incorporated by reference in s. NR 660.11.(8) SPECIAL REQUIREMENTS FOR INCOMPATIBLE WASTES. Generators shall comply with all of the following requirements: (a) Incompatible wastes, or incompatible wastes and materials, (see Appendix V of ch. NR 665 for examples) may not be placed in the same tank, unless s. NR 665.0017(2) is complied with.(b) Hazardous waste may not be placed in an unwashed tank which previously held an incompatible waste or material, unless s. NR 665.0017(2) is complied with.Wis. Admin. Code Department of Natural Resources NR 662.194
CR 05-032: cr. Register July 2006 No. 607, eff. 8-1-06.Amended by, CR 05-032: cr. Register July 2006 No. 607, eff. 8-1-06; CR 16-007: am. (3) (intro.), renum. (4) to (6) to (6) to (8) Register July 2017 No. 739, eff. 8-1-17; correction in (3) (intro.) made under s. 13.92(4) (b) 7, Stats., Register July 2017 No. 739, eff.8/1/2017