NR 440.70(4)(k)(k) The portion of each unburied sewer line shall be visually inspected initially and semiannually thereafter for indication of cracks, gaps or other problems that could result in VOC emissions.
NR 440.70(4)(L)(L) Whenever cracks, gaps or other problems are detected, repairs shall be made as soon as practicable, but not later than 15 calendar days after identification, except as provided in sub. (8).
NR 440.70(4)(m)(m) Except as provided in par. (n), each modified or reconstructed individual drain system that has a catch basin in the existing configuration prior to May 4, 1987 shall be exempt from the provisions of this subsection.
NR 440.70(4)(n)(n) Refinery wastewater routed through new process drains and a new first common downstream junction box, either as part of a new individual drain system or an existing individual drain system, may not be routed through a downstream catch basin.
NR 440.70(5)(5)Standards: oil-water separators.
NR 440.70(5)(a)(a) Each oil-water separator tank, slop oil tank, storage vessel or other auxiliary equipment subject to the requirements of this section shall be equipped and operated with a fixed roof, which meets the following specifications, except as provided in par. (d) or in sub. (11).
NR 440.70(5)(a)1.1. The fixed roof shall be installed to completely cover the separator tank, slop oil tank, storage vessel or other auxiliary equipment with no separation between the roof and the wall.
NR 440.70(5)(a)2.2. The vapor space under a fixed roof may not be purged unless the vapor is directed to a control device.
NR 440.70(5)(a)3.3. If the roof has access doors or openings, such doors or openings shall be gasketed, latched and kept closed at all times during operation of the separator system, except during inspection and maintenance.
NR 440.70(5)(a)4.4. Roof seals, access doors and other openings shall be checked by visual inspection initially and semiannually thereafter to ensure that no cracks or gaps occur between the roof and wall and that access doors and other openings are closed and gasketed properly.
NR 440.70(5)(a)5.5. When a broken seal or gasket or other problem is identified, first efforts at repair shall be made as soon as practicable, but not later than 15 calendar days after it is identified, except as provided in sub. (8).
NR 440.70(5)(b)(b) Each oil-water separator tank or auxiliary equipment with a design capacity to treat more than 16 liters per second (250 gpm) of refinery wastewater shall, in addition to the requirements in par. (a), be equipped and operated with a closed vent system and control device, which meet the requirements of sub. (7), except as provided in par. (c) or in sub. (11).
NR 440.70(5)(c)(c) Each modified or reconstructed oil-water separator tank with a maximum design capacity to treat less than 38 liters per second (600 gpm) of refinery wastewater which was equipped and operated with a fixed roof covering the entire separator tank or a portion of the separator tank prior to May 4, 1987 shall be exempt from the requirements of par. (b), but shall meet the requirements of par. (a) or may elect to comply with par. (c) 1.
NR 440.70(5)(c)1.1. The owner or operator may elect to comply with the requirements of par. (a) for the existing fixed roof covering a portion of the separator tank and comply with the requirements for floating roofs in sub. (11) for the remainder of the separator tank.
NR 440.70(5)(d)(d) Storage vessels, including slop oil tanks and other auxiliary tanks that are subject to the requirements of s. NR 440.27, 440.28 or 440.285, are not subject to the requirements of this subsection.
NR 440.70(5)(e)(e) Slop oil from an oil-water separator tank and oil wastewaters from slop oil handling equipment shall be collected, stored, transported, recycled, reused or disposed of in an enclosed system. Once slop oil is returned to the process unit or is disposed of, it is no longer within the scope of this section. Equipment used in handling slop oil shall be equipped with a fixed roof meeting the requirements of par. (a).
NR 440.70(5)(f)(f) Each oil-water separator tank, slop oil tank, storage vessel or other auxiliary equipment that is required to comply with par. (a) and not par. (b), may be equipped with a pressure control valve as necessary for proper system operation. The pressure control valve shall be set at the maximum pressure necessary for proper system operation, but such that the valve will not vent continuously.
NR 440.70(6)(6)Standards: aggregate facility. Anew, modified or reconstructed aggregate facility shall comply with the requirements of subs. (4) and (5).
NR 440.70(7)(7)Standards: closed vent system and control devices.
NR 440.70(7)(a)(a) Enclosed combustion devices shall be designed and operated to reduce the VOC emissions vented to them with an efficiency of 95% or greater or to provide a minimum residence time of 0.75 seconds at a minimum temperature of 816°C (1,500°F).
NR 440.70(7)(b)(b) Vapor recovery systems, for example, condensers and absorbers, shall be designed and operated to recover the VOC emissions vented to them with an efficiency of 95% or greater.
NR 440.70(7)(c)(c) Flares used to comply with this section shall comply with the requirements of s. NR 440.18.
NR 440.70(7)(d)(d) Closed vent systems and control devices used to comply with provisions of this section shall be operated at all times when emissions may be vented to them.
NR 440.70(7)(e)(e) Closed vent system shall be designed and operated with no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, as determined during the initial and semiannual inspections by the methods specified in sub. (14).
NR 440.70(7)(f)(f) Closed vent systems shall be purged to direct vapor to the control device.
NR 440.70(7)(g)(g) A flow indicator shall be installed on a vent stream to control a control device to ensure that the vapors are being routed to the device.
NR 440.70(7)(h)(h) All gauging and sampling devices shall be gas-tight except when gauging or sampling is taking place.
NR 440.70(7)(i)(i) When emissions from a closed system are detected, first efforts at repair to eliminate the emissions shall be made as soon as practicable, but not later than 30 calendar days from the date the emissions are detected, except as provided in sub. (8).
NR 440.70(8)(8)Standards: delay of repair.