NR 661.1053(7) (7) 

NR 661.1053(7)(a) (a) When a leak is detected, it shall be repaired as soon as practicable, but not later than 15 calendar days after it is detected, except as provided under s. NR 661.1059.

NR 661.1053(7)(b) (b) A first attempt at repair, such as tightening the packing gland, shall be made no later than 5 calendar days after each leak is detected.

NR 661.1053(8) (8) A compressor is exempt from the requirements under subs. (1) and (2) if it is equipped with a closed-vent system capable of capturing and transporting any leakage from the seal to a control device that complies with the requirements specified in s. NR 661.1060, except as provided in sub. (9).

NR 661.1053(9) (9) Any compressor that is designated, as described in s. NR 661.1064 (7) (b), for no detectable emissions as indicated by an instrument reading of less than 500 ppm above background is exempt from subs. (1) to (8) if the compressor meets all of the following requirements:

NR 661.1053(9)(a) (a) Is determined to be operating with no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, as measured by the method specified in s. NR 661.1063 (3).

NR 661.1053(9)(b) (b) Is tested for compliance with par. (a) initially upon designation, annually, and at other times as requested by the department.

NR 661.1053 History History: CR 19-082: cr. Register August 2020 No. 776, eff. 9-1-20.

NR 661.1054 NR 661.1054 Standards: pressure relief devices in gas/vapor service.

NR 661.1054(1) (1) Except during pressure releases, each pressure relief device in gas or vapor service shall be operated with no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, as measured by the method specified in s. NR 661.1063 (3).

NR 661.1054(2) (2) 

NR 661.1054(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 each pressure release, except as provided in s. NR 661.1059.

NR 661.1054(2)(b) (b) No later than 5 calendar days after the pressure release, the pressure relief device shall be monitored to confirm the condition of no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, as measured by the method specified in s. NR 661.1063 (3).

NR 661.1054(3) (3) Any pressure relief device that is equipped with a closed-vent system capable of capturing and transporting leakage from the pressure relief device to a control device as described in s. NR 661.1060 is exempt from the requirements under subs. (1) and (2).

NR 661.1054 History History: CR 19-082: cr. Register August 2020 No. 776, eff. 9-1-20.

NR 661.1055 NR 661.1055 Standards: sampling connection systems.

NR 661.1055(1) (1) Each sampling connection system shall be equipped with a closed-purge, closed-loop, or closed-vent system. This system shall collect the sample purge for return to the process or for routing to the appropriate treatment system. Gases displaced during filling of the sample container are not required to be collected or captured.

NR 661.1055(2) (2) Each closed-purge, closed-loop, or closed-vent system as required in sub. (1) shall meet one of the following requirements:

NR 661.1055(2)(a) (a) Return the purged process fluid directly to the process line.

NR 661.1055(2)(b) (b) Collect and recycle the purged process fluid.

NR 661.1055(2)(c) (c) Be designed and operated to capture and transport all the purged process fluid to a material management unit that complies with the applicable requirements specified in ss. NR 661.1084 to 664.1086 or a control device that complies with the requirements specified in s. NR 661.1060.

NR 661.1055(3) (3) In-situ sampling systems and sampling systems without purges are exempt from the requirements under subs. (1) and (2).

NR 661.1055 History History: CR 19-082: cr. Register August 2020 No. 776, eff. 9-1-20; correction in (2) (c) made under s. 35.17, Stats., Register August 2020 No. 776.

NR 661.1056 NR 661.1056 Standards: open-ended valves or lines.

NR 661.1056(1) (1) 

NR 661.1056(1)(a) (a) Each open-ended valve or line shall be equipped with a cap, blind flange, plug, or a second valve.

NR 661.1056(1)(b) (b) The cap, blind flange, plug, or second valve shall seal the open end at all times except during operations requiring hazardous secondary material stream flow through the open-ended valve or line.

NR 661.1056(2) (2) Each open-ended valve or line equipped with a second valve shall be operated in a manner such that the valve on the hazardous secondary material stream end is closed before the second valve is closed.

NR 661.1056(3) (3) When a double block and bleed system is being used, the bleed valve or line may remain open during operations that require venting the line between the block valves but shall comply with sub. (1) at all other times.