NR 661.1083(3)(d) (d) A remanufacturer or other person that stores or treats hazardous secondary material may use knowledge to determine the maximum organic vapor pressure of the hazardous secondary material. Documentation shall be prepared and recorded that presents the information used as the basis for the knowledge by the remanufacturer or other person that stores or treats the hazardous secondary material that the maximum organic vapor pressure of the hazardous secondary material is less than the maximum vapor pressure limit specified in s. NR 661.1084 (2) (a) 1. for the applicable tank design capacity category. An example of information that may be used is documentation that the hazardous secondary material is generated by a process for which at other locations it previously has been determined by direct measurement that the hazardous secondary material’s waste maximum organic vapor pressure is less than the maximum vapor pressure limit for the appropriate tank design capacity category.

NR 661.1083(4) (4) Procedure for determining no detectable organic emissions for the purpose of complying with this subchapter.

NR 661.1083(4)(a) (a) A remanufacturer or other person that stores or treats hazardous secondary material shall conduct a test to determine no detectable organic emissions for the purpose of complying with this chapter in accordance with the procedures specified in Method 21 in appendix A of 40 CFR part 60, incorporated by reference in s. NR 660.11. Each potential leak interface, a location where organic vapor leakage could occur, on the cover and associated closure devices shall be checked. Potential leak interfaces that are associated with covers and closure devices include the interface of the cover and its foundation mounting, the periphery of any opening on the cover and its associated closure device, and the sealing seat interface on a spring-loaded pressure relief valve.

NR 661.1083(4)(b) (b) The test shall be performed when the unit contains a hazardous secondary material having an organic concentration representative of the range of concentrations for the hazardous secondary material expected to be managed in the unit. During the test, the cover and closure devices shall be secured in the closed position.

NR 661.1083(4)(c) (c) The detection instrument shall meet the performance criteria of Method 21 in appendix A of 40 CFR part 60, incorporated by reference in s. NR 660.11, except the instrument response factor criteria in Section 3.1.2(a) of Method 21 shall be for the average composition of the organic constituents in the hazardous secondary material placed in the hazardous secondary management unit, not for each individual organic constituent.

NR 661.1083(4)(d) (d) The detection instrument shall be calibrated before use on each day of its use by the procedures specified in Method 21 in appendix A of 40 CFR part 60, incorporated by reference in s. NR 660.11.

NR 661.1083(4)(e) (e) Calibration gases shall be all of the following:

NR 661.1083(4)(e)1. 1. Zero air that is less than 10 ppmv hydrocarbon in air.

NR 661.1083(4)(e)2. 2. A mixture of methane or n-hexane and air at a concentration of approximately, but less than, 10,000 ppmv methane or n-hexane.

NR 661.1083(4)(f) (f) The background level shall be determined according to the procedures in Method 21 in appendix A of 40 CFR part 60, incorporated by reference in s. NR 660.11.

NR 661.1083(4)(g) (g) Each potential leak interface shall be checked by traversing the instrument probe around the potential leak interface as close to the interface as possible, as described in Method 21 in appendix A of 40 CFR part 60, incorporated by reference in s. NR 660.11. In the case when the configuration of the cover or closure device prevents a complete traverse of the interface, all accessible portions of the interface shall be sampled. In the case when the configuration of the closure device prevents any sampling at the interface and the device is equipped with an enclosed extension or horn, such as some pressure relief devices, the instrument probe inlet shall be placed at approximately the center of the exhaust area to the atmosphere.

NR 661.1083(4)(h) (h) The arithmetic difference between the maximum organic concentration indicated by the instrument and the background level shall be compared with the value of 500 ppmv except when monitoring a seal around a rotating shaft that passes through a cover opening, in which case the comparison shall be as specified in par. (i). If the difference is less than 500 ppmv, then the potential leak interface is determined to operate with no detectable organic emissions.

NR 661.1083(4)(i) (i) For the seals around a rotating shaft that passes through a cover opening, the arithmetic difference between the maximum organic concentration indicated by the instrument and the background level shall be compared with the value of 10,000 ppmw. If the difference is less than 10,000 ppmw, then the potential leak interface is determined to operate with no detectable organic emissions.

NR 661.1083 History History: CR 19-082: cr. Register August 2020 No. 776, eff. 9-1-20; correction in (1) (a) 1. (intro.), 1., (3) (d) made under s. 13.92 (4) (b) 7., Stats., Register April 2021 No. 784.

NR 661.1084 NR 661.1084 Standards: tanks.

NR 661.1084(1) (1) The provisions of this section apply to the control of air pollutant emissions from tanks for which s. NR 661.1082 (2) references the use of this section for such air emission control.

NR 661.1084(2) (2) The remanufacturer or other person that stores or treats the hazardous secondary material shall control air pollutant emissions from each tank subject to this section in accordance with one of the following requirements as applicable:

NR 661.1084(2)(a) (a) For a tank that manages hazardous secondary material that meets all of the conditions specified in subds. 1. to 2., the remanufacturer or other person that stores or treats the hazardous secondary material shall control air pollutant emissions from the tank in accordance with the Tank Level 1 controls specified in sub. (3) or the Tank Level 2 controls specified in sub. (4).

NR 661.1084(2)(a)1. 1. The hazardous secondary material in the tank has a maximum organic vapor pressure less than the maximum organic vapor pressure limit for the tank’s design capacity category as follows:

NR 661.1084(2)(a)1.a. a. For a tank design capacity equal to or greater than 151 m3, the maximum organic vapor pressure limit for the tank is 5.2 kPa.

NR 661.1084(2)(a)1.b. b. For a tank design capacity equal to or greater than 75 m3 but less than 151 m3, the maximum organic vapor pressure limit for the tank is 27.6 kPa.

NR 661.1084(2)(a)1.c. c. For a tank design capacity less than 75 m3, the maximum organic vapor pressure limit for the tank is 76.6 kPa.

NR 661.1084(2)(a)2. 2. The hazardous secondary material in the tank is not heated by the remanufacturer or other person that stores or treats the hazardous secondary material to a temperature that is greater than the temperature at which the maximum organic vapor pressure of the hazardous secondary material is determined for the purpose of complying with subd. 1.

NR 661.1084(2)(b) (b) For a tank that manages hazardous secondary material that does not meet all of the conditions specified in par. (a) 1. and 2., the remanufacturer or other person that stores or treats the hazardous secondary material shall control air pollutant emissions from the tank by using Tank Level 2 controls in accordance with the requirements under sub. (4). An example of a tank required to use Tank Level 2 controls is a tank for which the hazardous secondary material in the tank has a maximum organic vapor pressure that is equal to or greater than the maximum organic vapor pressure limit for the tank’s design capacity category as specified in par. (a) 1.

NR 661.1084(3) (3) A remanufacturer or other person that stores or treats the hazardous secondary material controlling air pollutant emissions from a tank using Tank Level 1 controls shall meet all of the following requirements:

NR 661.1084(3)(a) (a) The remanufacturer or other person that stores or treats that hazardous secondary material shall determine the maximum organic vapor pressure for a hazardous secondary material to be managed in the tank using Tank Level 1 controls before the first time the hazardous secondary material is placed in the tank. The maximum organic vapor pressure shall be determined using the procedures specified in s. NR 661.1083 (3). Thereafter, the remanufacturer or other person that stores or treats the hazardous secondary material shall perform a new determination whenever changes to the hazardous secondary material managed in the tank could potentially cause the maximum organic vapor pressure to increase to a level that is equal to or greater than the maximum organic vapor pressure limit for the tank design capacity category specified in sub. (2) (a) 1., as applicable to the tank.

NR 661.1084(3)(b) (b) The remanufacturer or other person that stores or treats that hazardous secondary material shall equip the tank with a fixed roof designed to meet all of the following specifications:

NR 661.1084(3)(b)1. 1. The fixed roof and its closure devices shall be designed to form a continuous barrier over the entire surface area of the hazardous secondary material in the tank. The fixed roof may be a separate cover installed on the tank, such as a removable cover mounted on an open-top tank, or may be an integral part of the tank structural design, such as a horizontal cylindrical tank equipped with a hatch.

NR 661.1084(3)(b)2. 2. The fixed roof shall be installed in a manner such that there are no visible cracks, holes, gaps, or other open spaces between roof section joints or between the interface of the roof edge and the tank wall.