Minnesota Administrative Rules

7011.1715 EMISSION MONITORING.

A.

The owner or operator of a nitric acid production unit shall install, calibrate, maintain, and operate a continuous monitoring system for the measurement and recording of nitrogen oxides emissions.

B.

The pollutant gas used to prepare calibration gas mixtures and for calibration checks shall be nitrogen dioxide (NO₂).

C.

Reference Method 7 shall be used for conducting monitoring system performance evaluations.

D.

The span shall be set at 500 ppm of nitrogen dioxide.

E.

The owner or operator of a nitric acid plant shall establish a conversion factor for the purpose of converting monitoring data into units of the applicable standard (kg/metric ton, lb/ton). The conversion factor shall be established by measuring emissions with the continuous monitoring system concurrent with measuring emissions with the applicable Reference Method tests. Using only that portion of the continuous monitoring emission data that represents emission measurements concurrent with the reference method test periods, the conversion factor shall be determined by dividing the reference method test data averages by the monitoring data averages to obtain a ratio expressed in units of the applicable standards to units of the monitoring data, i.e., (kg/metric ton per ppm, lb/ton per ppm). The conversion factor shall be reestablished during any performance test or any continuous monitoring system performance evaluation.

F.

The owner or operator of a nitric acid production unit shall record the daily production rate and hours of operation.

G.

For the purpose of reports under part 7017.1110, subpart 2, item B, periods of excess emissions that shall be reported are defined as any three-hour period during which the average nitrogen oxides emissions (arithmetic average of three contiguous one-hour periods) are measured by a continuous monitoring system exceed the applicable standards under part 7011.1705.

Statutory Authority:

MS s 116.07

History:

18 SR 580; 18 SR 614; 23 SR 1764

Published Electronically:

May 16, 2022