Wisconsin Administrative Code
Department of Natural Resources
NR 400-499 - Environmental Protection - Air Pollution Control
Chapter NR 439 - Reporting, Recordkeeping, Testing, Inspection AndDetermination Of Compliance Requirements
Section NR 439.09 - Methods and procedures for continuous emission monitoring

Universal Citation: WI Admin Code § NR 439.09

Current through August 26, 2024

The owner or operator of a source conducting continuous emission monitoring under s. NR 439.095 shall use the methods and procedures listed in this section to install, calibrate, maintain and operate a continuous emissions monitoring system, or other methods and procedures approved, in writing, by the department:

(1) Continuous emissions monitoring systems for measuring opacity shall comply with all the provisions and requirements in Performance Specification 1 in 40 CFR part 60, Appendix B, incorporated by reference in s. NR 484.04(21).

(2) Continuous emissions monitoring systems for measuring sulfur dioxide or nitrogen oxides shall comply with all the provisions and requirements in Performance Specification 2 in 40 CFR part 60, Appendix B or, for affected units, the performance specifications in 40 CFR part 75, Appendices A to I, incorporated by reference in s. NR 484.04(21) and (27).

(3) Continuous emissions monitoring systems for measuring oxygen or carbon dioxide shall comply with all the provisions and requirements in Performance Specification 3 in 40 CFR part 60, Appendix B or, for affected units, the performance specifications in 40 CFR part 75, Appendices A to I, incorporated by reference in s. NR 484.04(21) and (27).

(4) Continuous emissions monitoring systems for measuring carbon monoxide shall comply with all the provisions and requirements in Performance Specification 4 in 40 CFR part 60, Appendix B, incorporated by reference in s. NR 484.04(21).

(5) Continuous emissions monitoring systems for measuring total reduced sulfur shall comply with all the provisions and requirements in Performance Specification 5 in 40 CFR part 60, Appendix B, incorporated by reference in s. NR 484.04(21).

(6) Continuous emission rate monitoring systems shall comply with all the provisions and requirements in Performance Specification 6 in 40 CFR part 60, Appendix B, incorporated by reference in s. NR 484.04(21).

(7) Continuous emissions monitoring systems for measuring hydrogen sulfide shall comply with all the provisions and requirements in Performance Specification 7 in 40 CFR part 60, Appendix B, incorporated by reference in s. NR 484.04(21).

(7m) Continuous emissions monitoring systems for measuring VOCs shall comply with all the provisions and requirements in the department's approval issued under s. NR 439.095(1).

(8) The owner or operator of a continuous emissions monitoring system shall comply with the quality control and quality assurance plan submitted by the owner or operator of the source and approved by the department.

(9) Continuous emissions monitoring systems shall meet the following minimum frequency of operation requirements:

(a) Opacity monitors shall complete one cycle of sampling and analyzing for each successive 10-second period and one cycle of data recording for each successive 6-minute period.

(b) Sulfur dioxide, nitrogen oxides, oxygen, carbon dioxide, carbon monoxide, hydrogen sulfide, total reduced sulfur and VOC monitors shall complete one cycle of sampling, analyzing and data recording for each successive 15-minute period. The values recorded shall be averaged hourly. Hourly averages shall be computed from 4 data points equally spaced over each 1 hour period, except during periods when calibration, quality assurance or maintenance activities are being performed. During these periods, a valid hour shall consist of at least 2 data points separated by a minimum of 15 minutes.

(10) The owner or operator of a continuous emissions monitoring system shall submit quarterly excess emission reports to the department within 30 days following the end of each calendar quarter in accordance with pars. (a) to (d). The owner or operator shall submit either a full excess emission report under par. (a) or a summary excess emission report under par. (d), as specified in writing by the department.

(a) The full excess emission reports required under this subsection shall contain the following information:

1. The date and starting and ending times or duration of each period of excess emissions and the magnitude of the emissions.

2. The periods of excess emissions that occur during startups, shutdowns, sootblowing, control equipment malfunction, process malfunction, fuel problems, other known causes or for unknown causes. The report shall identify the cause of any malfunction and the measures taken to reduce excess emissions.

3. The date and starting and ending time of any period during which the monitoring system was inoperative for any reason or causes, including monitor malfunction or calibration, except for zero and span checks. The report shall identify the repairs or adjustments made to the system.

4. The date and starting and ending time of any period during which the process being monitored was inoperative.

5. When no period of excess emissions occurred during the quarter and the monitoring system had no period of downtime, an excess emissions report shall be filed stating such information.

(b) Unless otherwise specified by the department, in the reports required under this subsection, periods of excess emissions shall be reported as follows:

1. For opacity, any 6-minute period during which the average opacity exceeds the applicable emission limit.

2. For sulfur dioxide, any 24-hour rolling average during which the average sulfur dioxide emissions exceed the applicable emission limitation.

3. For nitrogen oxides, any 24-hour rolling average during which the average nitrogen oxides emissions exceed the applicable emission limitation.

4. For carbon monoxide, any one-hour period during which the average carbon monoxide emissions exceed the applicable emission limitation.

5. For total reduced sulfur, any 24-hour rolling average during which the average total reduced sulfur emissions exceed the applicable emission limitation.

(c) For purposes of reporting exceedances on the basis of a 24-hour rolling average under this subsection, any hourly average may be included in only one 24-hour period. An exceedance shall be based on at least 18 and not more than 24 valid recordings of hourly average emission rates in any 24 hour period.

(d) The summary excess emission report shall be submitted on a form provided by the department or in a format approved by the department.

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