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.
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)2.
2. In an instrument reading of 10,000 ppm or greater is measured a leak is detected.
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.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)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.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.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)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.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.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)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.
NR 440.62(3)(j)3.
3. 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 an exit concentration of 20 ppm by volume, on a dry basis, corrected to 3% oxygen, whichever is less stringent, or to provide a minimum residence time of 0.75 seconds at a minimum temperature of 816
°C.
NR 440.62(3)(j)5.
5. Owners or operators of control devices used to comply with the provisions of this section shall monitor these control devices to ensure that they are operated and maintained in conformance with their designs.
NR 440.62(3)(j)6.
6. Except as provided in
subds. 8. to
10., each closed vent system shall be inspected according to the following procedures and schedule:
NR 440.62(3)(j)6.a.
a. If the vapor collection system or closed vent system is constructed of hard-piping, the owner or operator shall do the following:
1) Conduct an initial inspection according to the procedures in sub. (6) (b).
2) Conduct annual inspections for visible, audible or olfactory indications of leaks.
NR 440.62(3)(j)6.b.
b. If the vapor collection system or closed vent system is constructed of ductwork, the owner or operator shall conduct an initial inspection and annual inspections according to the procedures in
sub. (6) (b).
NR 440.62(3)(j)7.
7. Leaks, as indicated by an instrument reading greater than 500 ppm by volume above background or by visual inspections, shall be repaired according to the following, except as provided in subd. 8:
NR 440.62(3)(j)7.a.
a. A first attempt at repair shall be made no later than 5 calendar days after the leak is detected.
NR 440.62(3)(j)7.b.
b. Repair shall be completed no later than 15 calendar days after the leak is detected.
NR 440.62(3)(j)8.
8. Delay of repair of a closed vent system for which leaks have been detected is allowed if the repair is technically infeasible without a process unit shutdown or if the owner or operator determines that emissions resulting from immediate repair would be greater than the fugitive emissions likely to result from delay of repair. Repair of the equipment shall be complete by the end of the next process unit shutdown.
NR 440.62(3)(j)9.
9. If a vapor collection system or closed vent system is operated under a vacuum, it is exempt from the inspection requirements of
subd. 6. a. 1) and b.
NR 440.62(3)(j)10.
10. Any parts of the closed vent system that are designated, as described in
subd. 11. a., as unsafe to inspect are exempt from the inspection requirements of
subd. 6. a. 1) and b. if they comply with the following requirements:
NR 440.62(3)(j)10.a.
a. The owner or operator determines that the equipment is unsafe to inspect because inspecting personnel would be exposed to an imminent or potential danger as a consequence of complying with
subd. 6. a. 1) or b.
