Minnesota Administrative Rules

7017.1160 CEMS MONITORING DATA.

Subpart 1.

Data points.

All data points collected by a CEMS shall be used to calculate individual hourly emission averages unless another applicable requirement or compliance document requires more frequent averaging. Each hourly average starts at the beginning of the hour and ends at the beginning of the following hour.

Subp. 2.

Minimum data points.

In order for an hour of data to be considered valid, it must contain the following minimum number of data points during the hour:

A.

four data points, equally spaced, if the emission unit operated during the entire hour;

B.

two data points, at least 15 minutes apart, during periods of monitor calibration, and periods of time to conduct quality control audits or routine maintenance; and

C.

one data point if the emission unit operated for 15 minutes or less during the hour.

Subp. 3.

Data reduction procedures.

Monitoring data shall be recorded in the same units of measurement and averaging period as the facility's emission standard.

Statutory Authority:

MS s 116.07

History:

23 SR 1764

Published Electronically:

November 29, 2007