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.