NR 419.045(2)(b)2.2. Equip the surface impoundment with a floating flexible membrane cover and meet all of the following requirements: NR 419.045(2)(b)2.a.a. Design the flexible membrane cover to float on the liquid surface during normal operations, and to form a continuous barrier over the entire surface area of the liquid. NR 419.045(2)(b)2.b.b. Fabricate the flexible membrane cover from a synthetic membrane material that is either a high density polyethylene with a thickness no less than 2.5 millimeters (100 mils) or a material, or a composite of different materials, determined to have both organic permeability properties that are equivalent to those of the high density polyethylene material, and chemical and physical properties that maintain the material integrity for the intended service life of the material. NR 419.045(2)(b)2.c.c. Install the flexible membrane cover so that there are no visible cracks, holes, gaps, or other open spaces between cover section seams or between the interface of the cover edge and its foundation mountings. NR 419.045(2)(b)2.d.d. Equip each opening in the flexible membrane cover with a closure device that is designed to operate so that when the closure device is secured in the closed position there are no visible cracks, holes, gaps, or other open spaces in the closure device or between the perimeter of the cover opening and the closure device. Notwithstanding the requirements of this subd. 2. d., the flexible membrane cover may be equipped with one or more emergency cover drains for removal of stormwater. Each emergency cover drain shall be equipped with a slotted membrane fabric cover that covers at least 90% of the area of the opening or a flexible fabric sleeve seal. NR 419.045(2)(b)2.e.e. Whenever an affected VOC wastewater stream or an affected residual is in the surface impoundment, the flexible membrane cover shall float on the liquid and each closure device shall be secured in the closed position. Closure devices may be opened or the flexible membrane cover may be removed to provide access to the surface impoundment for performing routine inspection, maintenance, or other activities needed for normal operations or to remove accumulated sludge or other residues from the bottom of the surface impoundment. NR 419.045(2)(c)(c) Oil-water separator. For each oil-water separator that receives, manages, or treats an affected VOC wastewater stream or an affected residual, the owner or operator shall comply with either subd. 1. or 2.: NR 419.045(2)(c)1.1. Equip the oil-water separator with a fixed roof and a closed vent system that route the vapors vented from the oil-water separator to a control device and meet all of the following requirements: NR 419.045(2)(c)1.a.a. Maintain each opening in the fixed roof in a closed, sealed position at all times that the oil-water separator contains an affected VOC wastewater stream or an affected residual, except when it is necessary to use the opening for sampling or removal, or for equipment inspection, maintenance, or repair. NR 419.045(2)(c)1.b.b. Design and operate the control device to reduce the VOC vented to it by at least 90% by weight. NR 419.045(2)(c)2.2. Equip the oil-water separator with a floating roof that meets all of the following requirements: NR 419.045(2)(c)2.a.a. Except as provided in this subd. 2. a., the floating roof shall have a closure device between the floating roof and the wall of the oil-water separator. For portions of the oil-water separator where it is infeasible to construct and operate a floating roof, such as over the weir mechanism, the owner or operator shall operate and maintain a fixed roof, closed vent system, and control device that meet the requirements specified in subd. 1. NR 419.045(2)(c)2.b.b. The closure device shall consist of a primary seal and a secondary seal. The primary seal shall be a liquid-mounted seal or a mechanical shoe seal. The secondary seal shall be above the floating roof and cover the annular space between the floating roof and the wall of the separator. NR 419.045(2)(c)2.c.c. The floating roof shall be floating on the liquid at all times and may not be resting on the roof supports, except during abnormal conditions such as low flow rate. NR 419.045(2)(c)2.d.d. Each opening in the floating roof shall be equipped with a cover, seal or lid fitted with a gasket, which shall be maintained in the closed position at all times, except during inspection and maintenance. Notwithstanding the requirements of this subd. 2. d., the floating roof may be equipped with one or more emergency cover drains for removal of stormwater. Each emergency cover drain shall be equipped with a slotted membrane fabric cover that covers at least 90% of the area of the opening or a flexible fabric sleeve seal. NR 419.045(2)(d)(d) Portable containers. For each portable container that receives, manages, or treats an affected VOC wastewater stream or an affected residual, the owner or operator shall operate and maintain a cover on the portable container according to all of the following requirements: NR 419.045(2)(d)1.1. Maintain the cover in place and maintain all openings in a closed position at all times that an affected VOC wastewater stream or an affected residual is in the portable container, except when it is necessary to use the opening for filling, removal, inspection, sampling, or pressure relief events related to safety considerations to prevent physical damage or permanent deformation of the portable container or cover. NR 419.045(2)(d)2.2. For portable containers with a capacity greater than or equal to 110 gallons, use a submerged fill pipe when a container is being filled by pumping with an affected VOC wastewater stream or an affected residual. The submerged fill pipe outlet shall extend to no more than six inches or within two fill pipe diameters of the bottom of the container while the container is being filled. NR 419.045(2)(d)3.3. During treatment of an affected VOC wastewater stream or an affected residual, including aeration, thermal or other treatment, in a portable container, whenever it is necessary for the container to be open, place the container within an enclosure with a closed-vent system that routes the VOC vapors vented from the container to a control device. The control device shall be designed and operated to reduce the VOC vented to it by at least 90% by weight. NR 419.045(2)(e)(e) Wastewater tanks. For each wastewater tank that receives, manages, or treats an affected VOC wastewater stream or an affected residual, the owner or operator shall operate and maintain a fixed roof for the wastewater tank. However, if the wastewater tank is used for either heating wastewater or for treating by means of an exothermic reaction, or the contents of the tank is sparged, or the wastewater tank has a capacity equal to or greater than 40,000 gallons and the maximum vapor pressure of the stored material is equal to or greater than 1.5 pounds per square inch absolute, the owner or operator shall operate and maintain one of the emission control techniques described in subd. 1., 2., or 3. NR 419.045(2)(e)1.1. A fixed roof and a closed-vent system that route the VOC vapors vented from the wastewater tank to a control device that complies with both of the following requirements: NR 419.045(2)(e)1.a.a. Each opening in the fixed roof shall be maintained in a closed position at all times that the wastewater tank contains an affected VOC wastewater stream or an affected residual, except when it is necessary to use the opening for wastewater sampling, removal, or for equipment inspection, maintenance, or repair. NR 419.045(2)(e)1.b.b. The control device shall be designed and operated to reduce the VOC vented to it by at least 90% by weight. NR 419.045(2)(e)2.2. A fixed roof and an internal floating roof that meet all of the following requirements: NR 419.045(2)(e)2.a.a. The internal floating roof shall be floating on the liquid surface at all times, except when the floating roof must be supported by the leg supports during initial fill, after the tank has been completely emptied and degassed, and when the tank is completely emptied before being subsequently refilled. NR 419.045(2)(e)2.b.b. When the floating roof is resting on the leg supports, the process of filling, emptying, or refilling shall be continuous and shall be accomplished as soon as practical. NR 419.045(2)(e)2.c.c. The internal floating roof shall be equipped with a closure device between the wall of the tank and the roof edge. The closure device shall consist of a liquid-mounted seal, or a metallic shoe seal, or two seals mounted one above the other so that each forms a continuous closure that completely covers the space between the wall of the storage vessel and the edge of the internal floating roof. The lower seal may be vapor-mounted, but both must be continuous seals. NR 419.045(2)(e)2.d.d. Automatic bleeder vents are to be closed at all times when the roof is floating, except when the roof is being floated off of, or is being landed on, the roof leg supports. NR 419.045(2)(e)2.e.e. Each opening in a noncontact internal floating roof, except for automatic bleeder vents (vacuum breaker vents) and rim space vents, is to provide a projection below the liquid surface. NR 419.045(2)(e)2.f.f. Each opening in the internal floating roof, except for leg sleeves, automatic bleeder vents, rim space vents, column wells, ladder wells, sample wells, and stub drains, shall be equipped with a cover or lid. The cover or lid shall be equipped with a gasket. NR 419.045(2)(e)2.g.g. Each penetration of the internal floating roof for the purposes of sampling shall be a sample well. Each sample well shall have a slit fabric cover that covers at least 90% of the opening. NR 419.045(2)(e)2.j.j. Each penetration of the internal floating roof that allows for passage of a ladder shall have a sliding cover fitted with a gasket. NR 419.045(2)(e)2.k.k. Each penetration of the internal floating roof that allows for passage of a column supporting the fixed roof shall have a flexible fabric sleeve seal or a sliding cover fitted with a gasket. NR 419.045(2)(e)2.L.L. Each cover or lid on any opening in the internal floating roof shall be closed so that there are no visible gaps, except when the cover or lid must be open for access. Covers on each access hatch and each gauge float well shall be bolted or fastened to be air-tight when they are closed. Rim space vents are to be set to open only when the internal floating roof is not floating or when the pressure beneath the rim seal exceeds the manufacturer’s recommended setting. NR 419.045(2)(e)3.3. An external floating roof that meets all of the following requirements: NR 419.045(2)(e)3.a.a. Each external floating roof shall be equipped with a closure device between the wall of the storage vessel and the roof edge. The closure device shall consist of two seals, one above the other. The lower seal (primary seal) shall be either a metallic shoe seal or a liquid-mounted seal. The upper seal (secondary seal) shall be a rim-mounted or shoe-mounted seal. NR 419.045(2)(e)3.b.b. Except during inspections, both the primary seal and the secondary seal shall completely cover the annular space between the external floating roof and the wall of the storage vessel in a continuous fashion. NR 419.045(2)(e)3.c.c. Except for automatic bleeder vents (vacuum breaker vents) and rim space vents, each opening in the noncontact external floating roof shall provide a projection below the liquid surface. NR 419.045(2)(e)3.d.d. Except for automatic bleeder vents, rim space vents, roof drains, and leg sleeves, each opening in the roof shall be equipped with a cover, seal, or lid fitted with a gasket. The cover, seal, or lid shall be maintained in a closed position so there are no visible gaps at all times, except when the cover or lid must be open for access. Covers on each access hatch and each gauge float well shall be bolted or fastened to be air-tight when they are closed. NR 419.045(2)(e)3.e.e. Automatic bleeder vents shall be closed at all times when the roof is floating, except when the roof is being floated off of, or is being landed on, the roof leg supports. NR 419.045(2)(e)3.f.f. Rim space vents shall be set to open only when the roof is being floated off of the roof leg supports or when the pressure beneath the rim seal exceeds the manufacturer’s recommended setting. NR 419.045(2)(e)3.h.h. Each roof drain that empties into the stored liquid shall be provided with a slotted membrane fabric cover that covers at least 90% of the area of the opening. NR 419.045(2)(e)3.i.i. Each unslotted guide pole well shall have a sliding cover fitted with a gasket or a flexible fabric sleeve seal. NR 419.045(2)(e)3.j.j. Each unslotted guide pole shall have a cap fitted with a gasket on the end of the pole, which is closed at all times except when gauging the liquid level or taking liquid samples. NR 419.045(2)(e)3.k.k. Each slotted guide pole well shall have a sliding cover fitted with a gasket or a flexible fabric sleeve seal. NR 419.045(2)(e)3.L.L. Each slotted guide pole shall have a float fitted with a gasket or other device that closes off the liquid surface from the atmosphere. NR 419.045(2)(e)3.m.m. Each gauge hatch or sample well shall have a cover fitted with a gasket which is closed at all times except when the hatch or well must be open for access. NR 419.045(2)(e)3.n.n. The external floating roof shall be floating on the liquid surface at all times except when the floating roof must be supported by the leg supports during any period of an initial fill, after the tank has been completely emptied and degassed, or when the tank is completely emptied before being subsequently refilled. NR 419.045(2)(e)3.o.o. When the floating roof is resting on the leg supports, the process of filling, emptying, or refilling shall be continuous and shall be accomplished as soon as practical. NR 419.045(2)(f)(f) Treatment processes. For each treatment process managing an affected VOC wastewater stream or an affected residual, the owner or operator shall comply with the requirements as specified in this paragraph. Once an affected VOC wastewater stream or an affected residual has been treated in accordance with the requirements of this paragraph, the affected VOC wastewater stream or the affected residual is no longer subject to the requirements of this subsection. NR 419.045(2)(f)1.1. Each component of the treatment process shall meet the applicable requirements of pars. (a) to (e). NR 419.045(2)(f)2.2. Gases vented from a treatment process shall be routed by means of a closed vent system to a control device which is designed and operated to reduce the VOC vented to it by at least 90% by weight. Vents from anaerobic biological treatment processes may be routed through hard-piping to a fuel gas system. NR 419.045(2)(f)3.3. For each of the affected VOC wastewater streams that are treated in a nonbiological treatment process, or a combination of nonbiological treatment processes, the owner or operator shall, by removal or destruction, reduce the mass flow rate of affected VOC by 90% or more while reducing the affected VOC concentration to less than 1,000 parts per million by weight. Dilution may not be used to achieve compliance with this subdivision. This requirement does not apply to affected wastewater or affected residuals that comply with the requirements for Resource Conservation and Recovery Act (RCRA) (42 USC 6921 to 6939e) treatment options specified in subd. 6. NR 419.045(2)(f)4.4. The owner or operator using a closed biological treatment process for at least one affected VOC wastewater stream shall reduce the mass flow rate for all affected VOC from all wastewater streams entering the biological treatment process by at least 90%. NR 419.045(2)(f)5.5. The owner or operator shall operate and maintain a steam stripper that meets all of the following requirements: NR 419.045(2)(f)5.c.c. Minimum steam flow rate of 0.04 kilograms of steam per liter of wastewater feed within the column. NR 419.045(2)(f)5.d.d. Minimum wastewater feed temperature to the steam stripper of 95°C, or minimum column operating temperature of 95°C. NR 419.045(2)(f)6.6. The owner or operator may elect to treat the affected VOC wastewater stream or affected residual in a unit identified in, and complying with any of the following RCRA treatment options: NR 419.045(2)(f)6.a.a. The affected VOC wastewater stream or affected residual is discharged to a hazardous waste incinerator for which the owner or operator has been issued a final permit under 40 CFR part 270 and complies with the requirements of 40 CFR part 264, subpart O, or has certified compliance with the interim status requirements of 40 CFR part 265, subpart O. NR 419.045(2)(f)6.b.b. The affected VOC wastewater stream or affected residual is discharged to a process heater or boiler burning hazardous waste for which the owner or operator has either been issued a final permit under 40 CFR part 270 and complies with the requirements of 40 CFR part 266, subpart H, or has certified compliance with the interim status requirements of 40 CFR part 266, subpart H. NR 419.045(2)(f)6.c.c. The affected VOC wastewater stream or affected residual is discharged to an underground injection well for which the owner or operator has been issued a final permit under 40 CFR part 270 or 40 CFR part 144 and complies with the requirements of 40 CFR part 122. The owner or operator shall comply with all applicable requirements of this subsection prior to the point where the wastewater enters the underground portion of the injection well. NR 419.045(2)(f)7.7. For each affected residual, the owner or operator shall control for air emissions by complying with pars. (a) to (e) and one of the following requirements: NR 419.045(2)(f)7.a.a. Recycle the affected residual to a production process on-site or transfer the affected residual off-site for the purpose of recycling. Once an affected residual is returned to a production process, the affected residual is no longer subject to this subsection. NR 419.045(2)(f)7.c.c. Treat the affected residual to destroy the total combined mass flow rate of affected VOC by 99% or more in a nonbiological treatment process. NR 419.045(3)(3) Alternative methods of control. The following alternate methods of demonstrating and documenting continuous compliance with the applicable control requirements or exemption criteria in this section may be utilized if approved by the department with written concurrence from EPA: NR 419.045(3)(a)(a) As an alternative to the control requirements of sub. (2), the owner or operator of waste management units may elect to ensure that the overall control of VOC emissions at the facility from wastewater from affected industrial categories is at least 90% less than the 2011 calendar year baseline emissions for VOC emissions to the ambient air from process wastewater, provided that adequate documentation is submitted to the department which supports the accuracy of the calendar year baseline emissions and the following requirements are met: NR 419.045(3)(a)1.1. The owner or operator of a waste management unit shall submit a control plan to the department which demonstrates that the overall control of VOC emissions at the facility from wastewater from affected industrial categories will be at least 90% less than the calendar year baseline emissions. Any control plan submitted shall be approved by the department in writing before the owner or operator may use the control option available under this paragraph for compliance. At a minimum, the control plan shall include the applicable emissions units’ identification; the facility identification number; the calendar year baseline emission rates of VOC from wastewater from affected industrial categories consistent with the calendar year baseline emissions; a plot plan showing the location, the emissions units’ identification, and facility identification number associated with a waste management unit; the VOC emission rates for each emissions unit for the preceding calendar year; and an explanation of the recordkeeping procedure and calculations which will be used to demonstrate compliance. The VOC emission rates shall be calculated in a manner consistent with the calendar year baseline emissions. NR 419.045(3)(a)2.2. The owner or operator shall submit an annual report no later than March 31 of each calendar year to the department which demonstrates that the overall control of VOC emissions from wastewater from affected industrial categories during the preceding calendar year is at least 90% less than the baseline emissions. At a minimum, the report shall include the facility identification number; the emissions units’ identification; the throughput of wastewater from affected industrial categories; a plot plan showing the location; the emissions units’ identification; and the facility identification number associated with waste management units; and the VOC emission rates for the preceding calendar year. The emission rates for the preceding calendar year shall be calculated in a manner consistent with the calendar year baseline emissions. NR 419.045(3)(a)3.3. All control plans and reports shall include documentation that the overall reduction of VOC emissions from wastewater from affected industrial categories continues to be at least 90% less than the calendar year baseline emissions. The emission rates shall be calculated in a manner consistent with the calendar year baseline emissions. NR 419.045(3)(b)(b) The owner or operator of an affected industrial category which is subject to and complies with the provisions of 40 CFR part 63, subpart G, subpart JJJ, or subpart FFFF, or any other emission standard promulgated under 40 CFR part 63 that references the wastewater control requirements set forth in 40 CFR part 63, subpart G, shall be deemed to be in compliance with this section, provided that all of the following are met: NR 419.045(3)(b)1.1. The term “affected VOC” is substituted each place that 40 CFR part 63, subpart G, subpart JJJ, and subpart FFFF, and any other 40 CFR part 63 emission standard references the term “organic hazardous air pollutant” or “organic HAP”. NR 419.045(3)(b)2.2. For affected VOC not specifically listed in table 9 of 40 CFR part 63, subpart G, the corresponding fraction removed value shall be based on one of the following: NR 419.045(3)(b)3.3. Before implementing the option available under this paragraph, the owner or operator provides written notice of the intent to utilize this option to the department. NR 419.045(4)(4) Inspection and monitoring. The owner or operator of a waste management unit that is subject to requirements under sub. (2) or (3) shall comply with the following inspection and monitoring requirements, except that an owner and operator subject to and in compliance with a subpart in 40 CFR part 63 as provided in sub. (3) (b), may comply with the inspection, monitoring, and record keeping requirements of that subpart instead of the requirements of this subsection. NR 419.045(4)(a)(a) All seals, covers, closed vent systems, and other equipment used to comply with sub. (2) or (3) shall be visually inspected for leaks and improper conditions semiannually and upon repair as specified in this paragraph. If any seal, cover, closed vent system, or other equipment is found to have a leak or be in improper condition, the equipment shall be repaired as soon as possible, but no later than 15 calendar days after detection, unless the repair or correction is technically infeasible without requiring a process unit shutdown, in which case the repair or correction shall be made during the next process unit shutdown. NR 419.045(4)(a)1.1. For a wastewater tank equipped with a fixed roof and vapor control system, visually inspect the fixed roof, openings, and the closed vent system for leaks, except for a cover and closed vent system maintained under negative pressure, and take corrective action. NR 419.045(4)(a)2.2. For a wastewater tank equipped with an internal or external floating roof, visually inspect for and correct the following improper conditions:
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Department of Natural Resources (NR)
Chs. NR 400-499; Environmental Protection – Air Pollution Control
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administrativecode/NR 419.045(2)(e)2.f.
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