Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 462 - National emission standards for hazardous air pollutants for industrial, commercial and institutional boilers and process heaters
Section NR 462.06 - Continuous compliance requirements

Universal Citation: WI Admin Code § NR 462.06

Current through August 26, 2024

(1) HOW DO I MONITOR AND COLLECT DATA TO DEMONSTRATE CONTINUOUS COMPLIANCE?

(a) You shall monitor and collect data according to the requirements of this section and the site-specific monitoring plan required by s. NR 462.04(1) (d).

(b) Except for monitor malfunctions, associated repairs and required quality assurance or control activities, including, as applicable, calibration checks and required zero and span adjustments, you shall monitor continuously, or collect data at all required intervals, at all times that the affected source is operating.

(c) You may not use data recorded during monitoring malfunctions, associated repairs or required quality assurance or control activities in data averages and calculations used to report emission or operating levels. You shall use all the data collected during all other periods in assessing the operation of the control device and associated control system. Boilers and process heaters that have an applicable carbon monoxide work practice standard and are required to install and operate a CEMS may not use data recorded during periods when the boiler or process heater is operating at less than 50% of its rated capacity.

(2) HOW DO I DEMONSTRATE CONTINUOUS COMPLIANCE WITH THE EMISSION LIMITS AND WORK PRACTICE STANDARDS?

(a) You shall demonstrate continuous compliance with each emission limit, operating limit and work practice standard in Tables 1 to 4 of this chapter that applies to you according to the methods specified in Table 8 of this chapter and subds. 1. to 10.

1. Following the date on which the initial performance test is completed or is required to be completed under ss. NR 460.06 and 462.05(1), whichever date comes first, you may not operate above any of the applicable maximum operating limits or below any of the applicable minimum operating limits listed in Tables 2 to 4 of this chapter at all times except during periods of startup, shutdown and malfunction. Operating limits do not apply during performance tests. Operation above the established maximum or below the established minimum operating limits shall constitute a deviation of established operating limits.

2. You shall keep records of the type and amount of all fuels burned in each boiler or process heater during the reporting period to demonstrate that all fuel types and mixtures of fuels burned would either result in lower emissions of TSM, HCl and mercury than the applicable emission limit for each pollutant, if you demonstrate compliance through fuel analysis, or result in lower fuel input of TSM, chlorine and mercury than the maximum values calculated during the last performance tests, if you demonstrate compliance through performance testing.

3. If you demonstrate compliance with an applicable HCl emission limit through fuel analysis and you plan to burn a new type of fuel, you shall recalculate the HCl emission rate using Equation 9 of s. NR 462.05(7) according to subd. 3. a. to c.

a. You shall determine the chlorine concentration for any new fuel type in units of pounds per million Btu, based on supplier data or your own fuel analysis, according to the provisions in your site-specific fuel analysis plan developed according to s. NR 462.05(4) (b).

b. You shall determine the new mixture of fuels that will have the highest content of chlorine.

c. Recalculate the HCl emission rate from your boiler or process heater under these new conditions using Equation 9 of s. NR 462.05(7). The recalculated HCl emission rate shall be less than the applicable emission limit.

4. If you demonstrate compliance with an applicable HCl emission limit through performance testing and you plan to burn a new type of fuel or a new mixture of fuels, you shall recalculate the maximum chlorine input using Equation 5 of s. NR 462.05(7). If the results of recalculating the maximum chlorine input are higher than the maximum chlorine input level established during the previous performance test, then you shall conduct a new performance test within 60 days of burning the new fuel type or fuel mixture according to the procedures in s. NR 462.05(3) to demonstrate that the HCl emissions do not exceed the emission limit. You shall also establish new operating limits based on this performance test according to the procedures in s. NR 462.05(7) (c).

5. If you demonstrate compliance with an applicable TSM emission limit through fuel analysis, and you plan to burn a new type of fuel, you shall recalculate the TSM emission rate using Equation 10 of s. NR 462.05(7) according to the procedures specified in subd. 5. a. to c.

a. You shall determine the TSM concentration for any new fuel type in units of pounds per million Btu, based on supplier data or your own fuel analysis, according to the provisions in your site-specific fuel analysis plan developed according to s. NR 462.05(4) (b).

b. You shall determine the new mixture of fuels that will have the highest content of TSM.

c. Recalculate the TSM emission rate from your boiler or process heater under these new conditions using Equation 10 of s. NR 462.05(7). The recalculated TSM emission rate shall be less than the applicable emission limit.

6. If you demonstrate compliance with an applicable TSM emission limit through performance testing, and you plan to burn a new type of fuel or a new mixture of fuels, you shall recalculate the maximum TSM input using Equation 6 of s. NR 462.05(7). If the results of recalculating the maximum total selected metals input are higher than the maximum TSM input level established during the previous performance test, then you shall conduct a new performance test within 60 days of burning the new fuel type or fuel mixture according to the procedures in s. NR 462.05(3) to demonstrate that the TSM emissions do not exceed the emission limit. You shall also establish new operating limits based on this performance test according to the procedures in s. NR 462.05(7) (c).

7. If you demonstrate compliance with an applicable mercury emission limit through fuel analysis, and you plan to burn a new type of fuel, you shall recalculate the mercury emission rate using Equation 11 of s. NR 462.05(7) according to the procedures specified in subd. 7. a. to c.

a. You shall determine the mercury concentration for any new fuel type in units of pounds per million Btu, based on supplier data or your own fuel analysis, according to the provisions in your site-specific fuel analysis plan developed according to s. NR 462.05(4) (b).

b. You shall determine the new mixture of fuels that will have the highest content of mercury.

c. Recalculate the mercury emission rate from your boiler or process heater under these new conditions using Equation 11 of s. NR 462.05(7). The recalculated mercury emission rate shall be less than the applicable emission limit.

8. If you demonstrate compliance with an applicable mercury emission limit through performance testing, and you plan to burn a new type of fuel or a new mixture of fuels, you shall recalculate the maximum mercury input using Equation 7 of s. NR 462.05(7). If the results of recalculating the maximum mercury input are higher than the maximum mercury input level established during the previous performance test, then you shall conduct a new performance test within 60 days of burning the new fuel type or fuel mixture according to the procedures in s. NR 462.05(3) to demonstrate that the mercury emissions do not exceed the emission limit. You shall also establish new operating limits based on this performance test according to the procedures in s. NR 462.05(7) (c).

9. If your unit is controlled with a fabric filter, and you demonstrate continuous compliance using a bag leak detection system, you shall initiate corrective action within one hour of a bag leak detection system alarm and complete corrective actions according to your SSMP and operate and maintain the fabric filter system such that the alarm does not sound more than 5% of the operating time during a 6-month period. You shall also keep records of the date, time and duration of each alarm, the time corrective action was initiated and completed and a brief description of the cause of the alarm and the corrective action taken. You shall also record the percent of the operating time during each 6-month period that the alarm sounds. In calculating this operating time percentage, if inspection of the fabric filter demonstrates that no corrective action is required, no alarm time is counted. If corrective action is required, each alarm shall be counted as a minimum of one hour. If you take longer than one hour to initiate corrective action, the alarm time shall be counted as the actual amount of time taken to initiate corrective action.

10. If you have an applicable work practice standard for carbon monoxide, and you are required to install a CEMS according to s. NR 462.05(6) (a), then you shall meet the requirements in subd. 10. a. to c.

a. You shall continuously monitor carbon monoxide according to s. NR 462.05(6) (a) and sub. (1).

b. Maintain a carbon monoxide emission level below your applicable carbon monoxide work practice standard in Table 1 of this chapter at all times except during periods of startup, shutdown, malfunction and when your boiler or process heater is operating at less than 50% of rated capacity.

c. Keep records of carbon monoxide levels according to s. NR 462.07(3) (b).

(b) You shall report each instance in which you did not meet each emission limit, operating limit and work practice standard in Tables 1 to 4 of this chapter that applies to you. You shall also report each instance during a startup, shutdown or malfunction when you did not meet each applicable emission limit, operating limit and work practice standard. These instances are deviations from the emission limits and work practice standards in this chapter. These deviations shall be reported according to the requirements in s. NR 462.07(2).

(c) During periods of startup, shutdown and malfunction, you shall operate in accordance with the SSMP as required in s. NR 462.04(1) (e).

(d) Consistent with ss. NR 460.05(4) and 460.06(4) (a), deviations that occur during a period of startup, shutdown or malfunction are not violations if you demonstrate to the department's satisfaction that you were operating in accordance with your SSMP. The department will determine whether deviations that occur during a period of startup, shutdown or malfunction are violations, according to the provisions in s. NR 460.05(4).

(3) HOW DO I DEMONSTRATE CONTINUOUS COMPLIANCE UNDER THE EMISSION AVERAGING PROVISIONS?

(a) Following the compliance date, an owner or operator following the emission averaging provisions shall demonstrate compliance with this chapter on a continuous basis by meeting all the requirements of subds. 1. to 4.

1. For each calendar month, demonstrate compliance with the average weighted emissions limit for the existing large solid fuel boilers participating in the emissions averaging option as determined in s. NR 462.05(5) (f) and (g).

2. For each existing solid fuel boiler participating in the emissions averaging option that is equipped with a dry control system, maintain opacity at or below the applicable limit.

3. For each existing solid fuel boiler participating in the emissions averaging option that is equipped with a wet scrubber, maintain the 3-hour average parameter values at or below the operating limits established during the most recent performance test.

4. For each existing solid fuel boiler participating in the emissions averaging option that has an approved alternative operating plan, maintain the 3-hour average parameter values at or below the operating limits established in the most recent performance test.

(b) Any instance where the owner or operator fails to comply with the continuous monitoring requirements in par. (a), except during periods of startup, shutdown and malfunction, is a deviation.

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