AIR QUALITY MEASURING DEVICES

Subpart 1. Device requirements. The owner or operator must demonstrate that the device and methods used to measure air quality conditions are accurate and reliable. Air quality measuring devices must be: A. capable of measuring carbon monoxide air concentrations in a range from 0 to 100 parts per million (ppm) in increments of 1 ppm; or B. capable of measuring nitrogen dioxide air concentrations in a range from 0 to 5 parts per million (ppm) in increments of 0.1 ppm. Subp. 2. Maintenance. The owner or operator must operate, store, maintain, and calibrate the devices according to the device manufacturer's specifications. The owner or operator must also keep maintenance and calibration records.