Sec. 217-4.3. Department audit requirements

The department shall periodically conduct equipment audits of the official emissions inspection stations. During these audits department personnel shall conduct quality control evaluations of the required test equipment, including the following:

(a) a gas audit using gases of known concentrations at least as accurate as those required for regular equipment quality control and comparing these concentrations to actual readings;

(b) a check for tampering, worn instrumentation, blocked filters, and other conditions that would impede accurate sampling;

(c) a check of the measured dilute flowrate in the VMAS unit;

(d) a leak check;

(e) a check to determine that station gas bottles used for calibration purposes are properly labeled and within the relevant tolerances;

(f) functional dynamometer checks addressing coast-down, roll speed and roll distance, inertia weight selection, and power absorption;

(g) a check of the system's ability to accurately detect background pollutant concentrations;

(h) a check of computer logic requirements; and

(i) a check that appropriate cutpoints are used.