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. NR 440.62(3)(j)10.b.b. The owner or operator has a written plan that requires inspection of the equipment as frequently as practicable during safe-to-inspect times. NR 440.62(3)(j)11.11. Any parts of the closed vent system that are designated, as described in subd. 12. b., as difficult to inspect are exempt from the inspection requirements of subd. 6. a. 1) and b. if they comply with the following: NR 440.62(3)(j)11.a.a. The owner or operator determines that the equipment cannot be inspected without elevating the inspecting personnel more than 2 meters above a support surface. NR 440.62(3)(j)11.b.b. The process unit within which the closed vent system is located becomes an affected facility through 40 CFR 60.14 or 60.15, or the owner or operator designates less than 3.0% of the total number of closed vent system equipment as difficult to inspect. NR 440.62(3)(j)11.c.c. The owner or operator has a written plan that requires inspection of the equipment at least once every 5 years. NR 440.62(3)(j)12.a.a. Identification of all parts of the closed vent system that are designated as unsafe to inspect, an explanation of why the equipment is unsafe to inspect and the plan for inspecting the equipment. NR 440.62(3)(j)12.b.b. Identification of all parts of the closed vent system that are designated as difficult to inspect, an explanation of why the equipment is difficult to inspect and the plan for inspecting the equipment. NR 440.62(3)(j)12.d.d. For each inspection conducted in accordance with sub. (6) (b) during which no leaks are detected, a record that the inspection was performed, the date of the inspection and a statement that no leaks were detected. NR 440.62(3)(j)12.e.e. For each inspection conducted in accordance with subd. 6. a. 2) during which no leaks are detected, a record that the inspection was performed, the date of the inspection and a statement that no leaks were detected. NR 440.62(3)(j)13.13. Closed vent systems and control devices used to comply with provisions of this section shall be operated at all times when emissions may be vented to them. NR 440.62(4)(a)1.1. An owner or operator may elect to comply with an allowable percentage of valves leaking of equal to or less than 2.0%. NR 440.62(4)(a)2.2. The following requirements shall be met if an owner or operator wishes to comply with an allowable percentage of valves leaking: NR 440.62(4)(a)2.a.a. An owner or operator shall notify the department that the owner or operator has elected to comply with the allowable percentage of valves leaking before implementing this alternative standard, as specified in sub. (8) (d). NR 440.62(4)(a)2.b.b. A performance test as specified in subd. 3. shall be conducted initially upon designation, annually, and at other times requested by the department. NR 440.62(4)(a)3.a.a. All valves in gas/vapor and light liquid service within the affected facility shall be monitored within 1 week by the methods specified in sub. (6) (b). NR 440.62(4)(a)3.b.b. If an instrument reading of 10,000 ppm or greater is measured a leak is detected. NR 440.62(4)(a)3.c.c. The leak percentage shall be determined by dividing the number of valves for which leaks are detected by the number of valves in gas/vapor and light liquid service within the affected facility. NR 440.62(4)(a)4.4. Owners and operators who elect to comply with this alternative standard may not have an affected facility with a leak percentage greater than 2.0%. NR 440.62(4)(b)1.a.a. An owner or operator may elect to comply with one of the alternative work practices specified in subd. 2. b. and c. NR 440.62(4)(b)1.b.b. An owner or operator shall notify the department before implementing one of the alternative work practices, as specified in sub. (8) (d). NR 440.62(4)(b)2.a.a. An owner or operator shall comply initially with the requirements for valves in gas/vapor service and valves in light liquid service, as described in sub. (3) (g). NR 440.62(4)(b)2.b.b. After 2 consecutive quarterly leak detection periods with the percent of valves leaking equal to or less than 2.0 an owner or operator may begin to skip 1 of the quarterly leak detection periods for the valves in gas/vapor and light liquid service. NR 440.62(4)(b)2.c.c. After 5 consecutive quarterly leak detection periods with the percent of valves leaking equal to or less than 2.0 an owner or operator may begin to skip 3 of the quarterly leak detection periods for the valves in gas/vapor and light liquid service. NR 440.62(4)(b)2.d.d. If the percent of valves leaking is greater than 2.0 the owner or operator shall comply with the requirements as described in sub. (3) (g) but can again elect to use this subsection. NR 440.62(4)(b)2.e.e. The percent of valves leaking shall be determined by dividing the sum of valves found leaking during current monitoring and valves for which repair has been delayed by the total number of valves subject to the requirements of this paragraph. NR 440.62(4)(b)2.f.f. An owner or operator shall keep a record of the percent of valves found leaking during each leak detection period. NR 440.62 NoteNote: Under 40 CFR 60.484, each owner or operator subject to the provisions of this section may apply to the administrator for determination of equivalence for any means of emission limitation that achieves a reduction in emissions of VOC at least equivalent to the reduction in emissions of VOC achieved by the controls required in this section. Manufacturers of equipment used to control equipment leaks of VOC may apply to the administrator for determination of equivalence for any equivalent means of emission limitation that achieves a reduction in emissions of VOC at least equivalent to the reduction in emissions of VOC achieved by the equipment, design and operational requirements of this section. The administrator will make an equivalence determination according to the provisions of 40 CFR 60.484 (b), (c), (d) and (e). NR 440.62(6)(a)(a) In conducting the performance tests required in s. NR 440.08, the owner or operator shall use as reference methods and procedures the test methods in Appendix A of 40 CFR part 60, incorporated by reference in s. NR 440.17, or other methods and procedures as specified in this subsection, except as provided in s. NR 440.08 (2). NR 440.62(6)(b)(b) The owner or operator shall determine compliance with the standards in subs. (3) and (4) as follows: NR 440.62(6)(b)1.1. Method 21 shall be used to determine the presence of leaking sources. The instrument shall be calibrated before use each day of its use by the procedures specified in Method 21. The following calibration gases shall be used: NR 440.62(6)(b)1.b.b. A mixture of methane or n-hexane and air at a concentration of about, but less than, 10,000 ppm methane or n-hexane.
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Department of Natural Resources (NR)
Chs. NR 400-499; Environmental Protection – Air Pollution Control
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