NR 440.20(7)(c)2.2. If the owner or operator has installed a nitrogen oxides emission rate continuous emission monitoring system (CEMS) to meet the requirements of 40 CFR part 75 and is continuing to meet the ongoing requirements of 40 CFR part 75, that CEMS may be used to meet the requirement of this paragraph, except that the owner or operator shall also meet the requirements of sub. (9). Data reported to meet the requirements of sub. (9) may not include data substituted using the missing data procedures in 40 CFR part 75, subpart D, nor shall the data have been bias adjusted according to the procedures of 40 CFR part 75. NR 440.20(7)(d)(d) The owner or operator of an affected facility shall install, calibrate, maintain and operate a continuous monitoring system, and record the output of the system, for measuring the oxygen or carbon dioxide content of the flue gases at each location where sulfur dioxide or nitrogen oxides emissions are monitored. NR 440.20(7)(e)(e) The continuous monitoring systems under pars. (b), (c) and (d) shall be operated and data recorded during all periods of operation of the affected facility including periods of startup, shutdown, malfunction or emergency conditions, except for continuous monitoring system breakdowns, repairs, calibration checks and zero and span adjustments. NR 440.20(7)(f)(f) The owner or operator shall obtain emission data for at least 18 hours in at least 22 out of 30 successive boiler operating days. If this minimum data requirement cannot be met with a continuous monitoring system, the owner or operator shall supplement emission data with other monitoring systems approved by the department or the reference methods and procedures as described in par. (h). NR 440.20(7)(g)(g) The one-hour averages required under s. NR 440.13 (8) shall be expressed in ng/J (lbs/million Btu) heat input and used to calculate the average emission rates under sub. (6). The one-hour averages shall be calculated using the data points required under s. NR 440.13 (2). At least 2 data points shall be used to calculate the one-hour averages. NR 440.20(7)(h)(h) When it becomes necessary to supplement continuous monitoring system data to meet the minimum data requirements in par. (f), the owner or operator shall use the reference methods and procedures as specified in this paragraph. Acceptable alternative methods and procedures are given in par. (j). NR 440.20(7)(h)1.1. Method 6 shall be used to determine the SO2 concentration at the same location as the SO2 monitor. Samples shall be taken at 60 minute intervals. The sampling time and sample volume for each sample shall be at least 20 minutes and 0.020 dscm (0.71 dscf). Each sample represents a 1-hour average. NR 440.20(7)(h)2.2. Method 7 shall be used to determine the NOx concentration at the same location as the NOx monitor. Samples shall be taken at 30-minute intervals. The arithmetic average of 2 consecutive samples represent a 1-hour average. NR 440.20(7)(h)3.3. The emission rate correction factor, integrated bag sampling and analysis procedure of Method 3B shall be used to determine the O2 or CO2 concentration at the same location as the O2 or CO2 monitor. Samples shall be taken for at least 30 minutes in each hour. Each sample represents a 1-hour average. NR 440.20(7)(h)4.4. The procedures in Method 19 shall be used to compute each 1-hour average concentration in ng/J (lb/million Btu) heat input. NR 440.20(7)(i)(i) The owner or operator shall use methods and procedures in this paragraph to conduct monitoring system performance evaluations under s. NR 440.13 (3) and calibration checks under s. NR 440.13 (4). Acceptable alternative methods and procedures are given in par. (j). NR 440.20(7)(i)1.1. Methods 3B, 6 and 7 shall be used to determine O2, SO2 and NOx concentrations, respectively. NR 440.20(7)(i)2.2. SO2 or NOx (NO), as applicable, shall be used for preparing the calibration gas mixtures (in N2, as applicable) under Performance Specification 2 of Appendix B of 40 CFR part 60, incorporated by reference in s. NR 440.17. NR 440.20(7)(i)3.3. For affected facilities burning only fossil fuel, the span value for a continuous monitoring system for measuring opacity shall be between 60 and 80% and for a continuous monitoring system measuring nitrogen oxides shall be determined as follows: where:
x is the fraction of total heat input derived from gaseous fossil fuel
y is the fraction of total heat input derived from liquid fossil fuel
z is the fraction of total heat input derived from solid fossil fuel
NR 440.20(7)(i)4.4. All span values computed under par. (b) 3. for burning combinations of fossil fuels shall be rounded to the nearest 500 ppm. NR 440.20(7)(i)5.5. For affected facilities burning fossil fuel, alone or in combination with nonfossil fuel, the span value of the sulfur dioxide continuous monitoring system at the inlet to the sulfur dioxide control device shall be 125% of the maximum estimated hourly potential emissions of the fuel fired, and the outlet of the sulfur dioxide control device shall be 50% of maximum estimated hourly potential emissions of the fuel fired. NR 440.20(7)(j)(j) The owner or operator may use the following as alternatives to the reference methods and procedures specified in this subsection. All test methods are in Appendix A of 40 CFR part 60, incorporated by reference in s. NR 440.17. NR 440.20(7)(j)1.1. For Method 6, Method 6A or 6B (whenever Methods 6 and 3 or 3B data are used) or 6C may be used. Each Method 6B sample obtained over 24 hours represents 24 1-hour averages. If Method 6A or 6B is used under par. (i), the conditions under s. NR 440.19 (7) (d) 1. apply; these conditions do not apply under par. (h). NR 440.20(7)(j)2.2. For Method 7, Method 7A, 7C, 7D or 7E may be used. If Method 7C, 7D or 7E is used, the sampling time for each run shall be 1 hour. NR 440.20(7)(j)3.3. For Method 3, Method 3A may be used if the sampling time is 1 hour. NR 440.20(7)(k)(k) The procedures specified in subds. 1. to 3. shall be used to determine gross output for sources demonstrating compliance with the output-based standard under sub. (5) (d) 1. NR 440.20(7)(k)1.1. The owner or operator of an affected facility with electricity generation shall install, calibrate, maintain and operate a wattmeter; measure gross electrical output in megawatt-hours on a continuous basis and record the output of the monitor. NR 440.20(7)(k)2.2. The owner or operator of an affected facility with process steam generation shall install, calibrate, maintain and operate meters for steam flow, temperature and pressure; measure gross process steam output in joules per hour (Btu per hour) on a continuous basis and record the output of the monitor. NR 440.20(7)(k)3.3. For affected facilities generating process steam in combination with electrical generation, the gross energy output is determined from the gross electrical output measured in accordance with subd. 1. plus 50% of the gross thermal output of the process steam measured in accordance with subd. 2.