Chapter NR 440

NR 440.62(3)(c)3. 3. The barrier fluid system shall be in heavy liquid service or may not be in VOC service.

NR 440.62(3)(c)4. 4. Each barrier fluid system as described in subd. 1. shall be equipped with a sensor that will detect failure of the seal system, barrier fluid system, or both.

NR 440.62(3)(c)5. 5.

NR 440.62(3)(c)5.a. a. Each sensor as required in subd. 4. shall be checked daily or shall be equipped with an audible alarm.

NR 440.62(3)(c)5.b. b. The owner or operator shall determine, based on design considerations and operating experience, a criterion that indicates failure of the seal system, the barrier fluid system, or both.

NR 440.62(3)(c)6. 6. If the sensor indicates failure of the seal system, the barrier system, or both based on the criterion determined under subd. 5. b. a leak is detected.

NR 440.62(3)(c)7. 7.

NR 440.62(3)(c)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 in par. (i).

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) (d) Pressure relief devices in gas/vapor service.

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. 2.

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. 4.

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) (e) Sampling connection systems.

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.a. a. Return the purged process fluid directly to the process line.

NR 440.62(3)(e)2.b. b. Collect and recycle the purged process fluid to the process line.

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.

2) A treatment, storage or disposal facility subject to regulation under 40 CFR part 262, 264, 265 or 266.

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) (f) Open-ended valves or lines.

NR 440.62(3)(f)1. 1.

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.

NR 440.62(3)(f)1.b. b. The cap, blind flange, plug, or second valve shall seal the open end at all times except during operations requiring process fluid flow through the open-ended valve or line.

NR 440.62(3)(f)2. 2. Each open-ended valve or line equipped with a second valve shall be operated with a second valve shall be operated in a manner such that the valve on the process fluid end is closed before the second valve is closed.

NR 440.62(3)(f)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 subd. 1. at all other times.

NR 440.62(3)(f)4. 4. Open-ended valves or lines in an emergency shutdown system which are designed to open automatically in the event of a process upset are exempt from the requirements of subds. 1. to 3.

NR 440.62(3)(f)5. 5. Open-ended valves or lines containing materials which would autocatalytically polymerize or would present an explosion, serious overpressure or other safety hazard if capped or equipped with a double block and bleed system as specified in subds. 1. to 3. are exempt from the requirements of subds. 1. to 3.

NR 440.62(3)(g) (g) Valves in gas/vapor service and in light liquid service.

NR 440.62(3)(g)1. 1. Each valve shall be monitored monthly to detect leaks by the methods specified in sub. (6) (b) and shall comply with subds. 2. to 5., except as provided in subds. 6., 7. and 8., subs. (4) (a) and (b) and par. (a) 3.

NR 440.62(3)(g)2. 2. In an instrument reading of 10,000 ppm or greater is measured a leak is detected.

NR 440.62(3)(g)3. 3.

NR 440.62(3)(g)3.a. a. Any valve for which a leak is not detected for 2 successive months may be monitored the first month of every quarter, beginning with the next quarter, until a leak is detected.

NR 440.62(3)(g)3.b. b. If a leak is detected the valve shall be monitored monthly until a leak is not detected for 2 successive months.

NR 440.62(3)(g)4. 4.

NR 440.62(3)(g)4.a. a. When a leak is detected it shall be repaired as soon as practicable, but no later than 15 calendar days after the leak is detected, except as provided in par. (i).

NR 440.62(3)(g)4.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)(g)5. 5. First attempts at repair include, but are not limited to, the following best practices where practicable:

NR 440.62(3)(g)5.a. a. Tightening of bonnet bolts;

NR 440.62(3)(g)5.b. b. Replacement of bonnet bolts;

NR 440.62(3)(g)5.c. c. Tightening of packing gland nuts;

NR 440.62(3)(g)5.d. d. Injection of lubricant into lubricated packing.

NR 440.62(3)(g)6. 6. Any valve that is designated as described in sub. (7) (e) 2. for no detectable emissions, as indicated by an instrument reading of less than 500 ppm above background, is exempt from the requirements of subd. 1. if the valve:

NR 440.62(3)(g)6.a. a. Has no external actuating mechanism in contact with the process fluid;

NR 440.62(3)(g)6.b. b. Is operated with emission less than 500 ppm above background as determined by the method specified in sub. (6) (c), and

NR 440.62(3)(g)6.c. c. Is tested for compliance with subd. 6. b. initially upon designation, annually, and at other times requested by the department.

NR 440.62(3)(g)7. 7. Any valve that is designated as described in sub. (7) (f) 2. as a difficult-to-monitor valve is exempt from the requirements of subd. 1. if:

NR 440.62(3)(g)7.a. a. The owner or operator of the valve demonstrates that the valve is unsafe to monitor because monitoring personnel would be exposed to an immediate danger as a consequence of complying with subd. 1., and

NR 440.62(3)(g)7.b. b. The owner or operator of the valve adheres to a written plan that requires monitoring of the valve as frequently as practicable during safe-to-monitor times.

NR 440.62(3)(g)8. 8. Any valve that is designated as described in sub. (7) (f) 2. as a difficult-to-monitor valve, is exempt from the requirements of subd. 1. if:

NR 440.62(3)(g)8.a. a. The owner or operator of the valve demonstrates that the valve cannot be monitored without elevating the monitoring personnel more than 2 meters above a support surface.

NR 440.62(3)(g)8.b. b. The process unit within which the valve is located either becomes an affected facility through s. NR 440.14 or 440.15, or the owner or operator designates less than 3.0% of the total number of valves as difficult-to-monitor, and

NR 440.62(3)(g)8.c. c. The owner or operator of the valve follows a written plan that requires monitoring of the valve at least once per calendar year.

NR 440.62(3)(h) (h) Pumps and valves in heavy liquid service, pressure relief devices in light liquid or heavy liquid service and connectors.

NR 440.62(3)(h)1. 1. If evidence of a potential leak is found by visual, audible, olfactory or any other detection method at pumps and valves in heavy liquid service, pressure relief devices in light liquid or heavy liquid service and connectors, the owner or operator shall follow one of the following procedures:

NR 440.62(3)(h)1.a. a. Monitor the equipment within 5 days by the method specified in sub. (6) (b) and comply with the requirements in subds. 2 to 4.

NR 440.62(3)(h)1.b. b. Eliminate the visual, audible, olfactory or other indication of a potential leak.

NR 440.62(3)(h)2. 2. If an instrument reading of 10,000 ppm or greater is measured a leak is detected.

NR 440.62(3)(h)3. 3.

NR 440.62(3)(h)3.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 in par. (i).

NR 440.62(3)(h)3.b. b. The first attempt at repair shall be made no later than 5 calendar days after each leak is detected.

NR 440.62(3)(h)4. 4. First attempts at repair include, but are not limited to, the best practices described under par. (g) 5.

NR 440.62(3)(i) (i) Delay of repair.

NR 440.62(3)(i)1. 1. Delay of repair of equipment for which leaks have been detected shall be allowed if repair within 15 days is technically infeasible without a process unit shutdown. Repair of this equipment shall occur before the end of the next process unit shutdown.

NR 440.62(3)(i)2. 2. Delay of repair of equipment will be allowed for equipment which is isolated from the process and which does not remain in VOC service.

NR 440.62(3)(i)3. 3. Delay of repair for valves will be allowed if:

NR 440.62(3)(i)3.a. a. The owner or operator demonstrates that emissions of purged material resulting from immediate repair are greater than the fugitive emissions likely to result from delay of repair, and

NR 440.62(3)(i)3.b. b. When repair procedures are effected, the purged material is collected and destroyed or recovered in a control device complying with par. (j).

NR 440.62(3)(i)4. 4. Delay of repair for pumps will be allowed if:

NR 440.62(3)(i)4.a. a. Repair requires the use of a dual mechanical seal system that includes a barrier fluid system, and

NR 440.62(3)(i)4.b. b. Repair is completed as soon as practicable but not later than 6 months after the leak was detected.

NR 440.62(3)(i)5. 5. Delay of repair beyond a process unit shutdown will be allowed for a valve if valve assembly replacement is necessary during the process unit shutdown, valve assembly supplies have been depleted and valve assembly supplies had been sufficiently stocked before the supplies were depleted. Delay of repair beyond the next process unit shutdown will not be allowed unless the next process unit shutdown occurs sooner than 6 months after the first process unit shutdown.

NR 440.62(3)(j) (j) Closed vent systems and control devices.

NR 440.62(3)(j)1. 1. Owners or operators of closed vent systems and control devices used to comply with provisions of this section shall comply with the provisions of this paragraph.

NR 440.62(3)(j)2. 2. Vapor recovery systems (for example, condensers and adsorbers) shall be designed and operated to recover the VOC emissions vented to them with an efficiency of 95% or greater, or to an exit concentration of 20 ppm by volume, whichever is less stringent.