NR 440.62(3)(c)7.b.b. A first attempt at repair shall be made no later than 5 calendar days after each leak is detected. NR 440.62(3)(c)8.8. A compressor is exempt from the requirements of subds. 1. and 2. if it is equipped with a closed vent system to capture and transport leakage from the compressor drive shaft back to a process or fuel gas system or to a control device that complies with the requirements of par. (j), except as provided in subd. 9. NR 440.62(3)(c)9.9. Any compressor that is designated as described in sub. (7) (e) 1. and 2. for no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, is exempt from the requirements of subds. 1. to 8. if the compressor: NR 440.62(3)(c)9.a.a. Is demonstrated to be operating with no detectable emissions as indicated by an instrument reading of less than 500 ppm above background, as measured by the methods specified in sub. (6) (c); and NR 440.62(3)(c)9.b.b. Is tested for compliance with subd. 9. a. initially upon designation, annually and at other times requested by the department. NR 440.62(3)(c)10.10. Any existing reciprocating compressor in a process unit which becomes an affected facility under provisions of s. NR 440.14 or 440.15 is exempt from subds. 1., 2., 3., 4., 5. and 8. provided the owner or operator demonstrates that recasting the distance piece or replacing the compressor are the only options available to bring the compressor into compliance with the provisions of subds. 1., 2., 3., 4., 5. and 8. NR 440.62(3)(d)1.1. Except during pressure releases, each pressure relief device in gas/vapor service shall be operated with no detectable emissions as indicated by an instrument reading of less than 500 ppm above background, as determined by the methods specified in sub. (6) (c). NR 440.62(3)(d)2.a.a. After each pressure release the pressure relief device shall be returned to a condition of no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, as soon as practicable but no later than 5 calendar days after the pressure release, as provided in par. (i). NR 440.62(3)(d)2.b.b. No later than 5 calendar days after the pressure release the pressure relief device shall be monitored to confirm the conditions of no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, by the methods specified in sub. (6) (c). NR 440.62(3)(d)3.3. Any pressure relief device that is routed to a process or fuel gas system or equipped with a closed vent system capable of capturing and transporting leakage through the pressure relief device to a control device as described in par. (j) is exempted from the requirements of subds. 1. and 2. NR 440.62(3)(d)4.a.a. Any pressure relief device that is equipped with a rupture disk upstream of the pressure relief device is exempt from the requirements of subds. 1. and 2., provided the owner or operator complies with the requirements in subd. 4. b. NR 440.62(3)(d)4.b.b. After each pressure release, a new rupture disk shall be installed upstream of the pressure relief device as soon as practicable, but no later than 5 calendar days after each pressure release, except as provided in par. (i). NR 440.62(3)(e)1.1. Each sampling connection system shall be equipped with a closed purge, closed loop or closed vent system, except as provided in par. (a) 3. Gases displaced during filling of the sample container are not required to be collected or captured. NR 440.62(3)(e)2.2. Each closed purge, closed loop or closed vent system as required in subd. 1. shall do one of the following: NR 440.62(3)(e)2.c.c. Be designed and operated to capture and transport all the purged process fluid to a control device that complies with the requirements of par. (j). NR 440.62(3)(e)2.d.d. Collect, store and transport the purged process fluid to any of the following systems or facilities: 1) A waste management unit as defined in 40 CFR 63.111, if the waste management unit is subject to, and operated in compliance with the provisions of 40 CFR part 63, subpart G, applicable to group 1 wastewater streams. 3) A facility permitted, licensed or registered by a state to manage municipal or industrial solid waste, if the process fluids are not hazardous waste as defined in 40 CFR part 261. NR 440.62(3)(e)3.3. In situ-sampling systems and sampling systems without purges are exempt from subds. 1. and 2. NR 440.62(3)(f)1.a.a. Each open-ended valve or line shall be equipped with a cap, blind flange, plug, or a second valve, except as provided in par. (a) 3.