NR 440.75(6)(c)4.d.d. Any location that initially showed an exceedance but has a methane concentration less than 500 ppm methane above background at the 10-day re-monitoring specified in subd. 4. b. or c. shall be re-monitored one month from the initial exceedance. If the 1-month remonitoring shows a concentration less than 500 parts per million above background, no further monitoring of that location is required until the next quarterly monitoring period. If the 1-month remonitoring shows an exceedance, the actions specified in subd. 4. c. or e. shall be taken.

NR 440.75(6)(c)4.e.e. For any location where monitored methane concentration equals or exceeds 500 parts per million above background 3 times within a quarterly period, a new well or other collection device shall be installed within 120 calendar days of the initial exceedance. An alternative remedy to the exceedance, such as upgrading the blower, header pipes or control device, and a corresponding timeline for installation may be submitted to the department for approval.

NR 440.75(6)(c)5.5. The owner or operator shall implement a program to monitor for cover integrity and implement cover repairs as necessary on a monthly basis.

NR 440.75(6)(d)(d) Each owner or operator seeking to comply with the provisions in par. (c) shall comply with the following instrumentation specifications and procedures for surface emission monitoring devices:

NR 440.75(6)(d)1.1. The portable analyzer shall meet the instrument specifications provided in section 3 of Method 21 in 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1), except that “methane” shall replace all references to VOC.

NR 440.75(6)(d)2.2. The calibration gas shall be methane, diluted to a nominal concentration of 500 parts per million in air.

NR 440.75(6)(d)3.3. To meet the performance evaluation requirements in section 3.1.3 of Method 21 in 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1), the instrument evaluation procedures of section 4.4 of Method 21 shall be used.

NR 440.75(6)(d)4.4. The calibration procedures provided in section 4.2 of Method 21 in 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1), shall be followed immediately before commencing a surface monitoring survey.

NR 440.75(6)(e)(e) The provisions of this section apply at all times, except during periods of startup, shutdown or malfunction, provided that the duration of startup, shutdown or malfunction may not exceed 5 days for collection systems and may not exceed one hour for treatment or control devices.

NR 440.75(7)(a)(a) Each owner or operator seeking to comply with sub. (3) (b) 2. b. 1) for an active gas collection system shall install a sampling port and a thermometer, other temperature measuring device, or an access port for temperature measurements at each wellhead and do all of the following:

NR 440.75(7)(a)1.1. Measure the gauge pressure in the gas collection header on a monthly basis as provided in sub. (6) (a) 4.

NR 440.75(7)(a)2.2. Monitor nitrogen or oxygen concentration in the landfill gas on a monthly basis as provided in sub. (6) (a) 6.

NR 440.75(7)(b)(b) Each owner or operator seeking to comply with sub. (3) (b) 2. c. using an enclosed combustor shall calibrate, maintain and operate according to the manufacturer’s specifications, the following equipment:

NR 440.75(7)(b)1.1. A temperature monitoring device equipped with a continuous recorder and having a minimum accuracy of ± 1% of the temperature being measured, expressed in degrees Celsius, or ± 0.5 degrees Celsius, whichever is greater. A temperature monitoring device is not required for boilers or process heaters with design heat input capacity equal to or greater than 44 megawatts.

NR 440.75(7)(b)2.2. A device that records flow to or bypass of the control device. The owner or operator shall do one of the following:

NR 440.75(7)(b)2.a.a. Install, calibrate and maintain a gas flow rate measuring device that shall record the flow to the control device at least every 15 minutes.

NR 440.75(7)(b)2.b.b. Secure the bypass line valve in the closed position with a car-seal or a lock-and-key type configuration. A visual inspection of the seal or closure mechanism shall be performed at least once every month to ensure that the valve is maintained in the closed position and that the gas flow is not diverted through the bypass line.

NR 440.75(7)(c)(c) Each owner or operator seeking to comply with sub. (3) (b) 2. c. using an open flare shall install, calibrate, maintain and operate according to the manufacturer’s specifications the following equipment:

NR 440.75(7)(c)1.1. A heat sensing device, such as an ultraviolet beam sensor or thermocouple, at the pilot light or the flame itself to indicate the continuous presence of a flame.

NR 440.75(7)(c)2.2. A device that records flow to or bypass of the flare. The owner or operator shall do one of the following:

NR 440.75(7)(c)2.a.a. Install, calibrate and maintain a gas flow rate measuring device that shall record the flow to the control device at least every 15 minutes.

NR 440.75(7)(c)2.b.b. Secure the bypass line valve in the closed position with a car-seal or a lock-and-key type configuration. A visual inspection of the seal or closure mechanism shall be performed at least once every month to ensure that the valve is maintained in the closed position and that the gas flow is not diverted through the bypass line.

NR 440.75(7)(d)(d) Each owner or operator seeking to demonstrate compliance with sub. (3) (b) 2. c. using a device other than an open flare or an enclosed combustor shall provide information satisfactory to the department as provided in sub. (3) (b) 2. a. 2) describing the operation of the control device, the operating parameters that would indicate proper performance, and appropriate monitoring procedures. The department shall review the information and either approve it or request that additional information be submitted. The department may specify additional appropriate monitoring procedures.

NR 440.75(7)(e)(e) Each owner or operator seeking to install a collection system that does not meet the specifications in sub. (10), or seeking to monitor alternative parameters to those required by subs. (4) to (6) or this subsection, shall provide information satisfactory to the department as provided in sub. (3) (b) 2. a. 2) and 3) describing the design and operation of the collection system, the operating parameters that would indicate proper performance, and appropriate monitoring procedures. The department may specify additional appropriate monitoring procedures.

NR 440.75(7)(f)(f) Each owner or operator seeking to demonstrate compliance with sub. (6) (c) shall monitor surface concentrations of methane according to the instrument specifications and procedures provided in sub. (6) (d). Any closed landfill that has no monitored exceedances of the operational standard in 3 consecutive quarterly monitoring periods may skip to annual monitoring. Any methane reading of 500 ppm or more above background detected during the annual monitoring shall return the frequency for that landfill to quarterly monitoring.