N.D. Admin. Code tit. 33.1, art. 33.1-15, ch. 33.1-15-11, tbl. 6
An internal watch by the department shall be actuated by a national weather service advisory that an atmospheric stagnation advisory is in effect or the equivalent local forecast of a stagnant atmospheric condition.
The alert level is that concentration of contaminants at which first stage control actions are to begin. An alert will be declared when any one of the following levels is reached at any monitoring site:
SO2-800 µg/m (0.3 ppm), 24-hour average.
PM10 - 350 µg/m3, 24-hour average.
CO-17 mg/m3 (15 ppm), 8-hour average.
Ozone (O3) - 400 µg/m3 (0.2 ppm), 1-hour average.
NO2 - 1,130 µg/m3 (0.6 ppm), 1-hour average; 282 µg/m3 (0.15 ppm), 24-hour average.
In addition to the levels listed for the above pollutants, meteorological conditions are such that pollutant concentrations can be expected to remain at the above levels for twelve or more hours or increase, or in the case of ozone, the situation is likely to recur within the next twenty-four hours unless control actions are taken.
The warning level indicates that air quality is continuing to degrade and that additional control actions are necessary. A warning will be declared when any one of the following levels is reached at any monitoring site:
SO2 - 1,600 µg/m3 (0.6 ppm), 24 - hour average.
PM10 - 420 µg/m3, 24 - hour average.
CO-34 mg/m3 (30 ppm), 8 - hour average.
Ozone (O3) - 800 µg/m3 (0.4 ppm), 1 - hour average.
NO2 - 2,260 µg/m3 (1.2 ppm), 1 - hour average; 565 µg/m3 (0.3 ppm), 24 - hour average.
In addition to the levels listed for the above pollutants, meteorological conditions are such that pollutant concentrations can be expected to remain at the above levels for twelve or more hours or increase, or in the case of ozone, the situation is likely to recur within the next twenty-four hours unless control actions are taken.
The emergency level indicates that air quality is continuing to degrade toward a level of significant harm to the health of persons and that the most stringent control actions are necessary. An emergency will be declared when any one of the following levels is reached at any monitoring site:
SO2 - 2,100 µg/m3 (0.8 ppm), 24 - hour average.
PM10 - 500 µg/m3, 24 - hour average.
CO-46 mg/m3 (40 ppm), 8 - hour average.
Ozone (O3) - 1,000 µg/m3 (0.5 ppm), 1 - hour average.
NO2 - 3,000 µg/m3 (1.6 ppm), 1 - hour average; 750 µg/m 3 (0.4 ppm), 24 - h our average.
In addition to the levels listed for the above pollutants, meteorological conditions are such that pollutant concentrations can be expected to remain at the above levels for twelve or more hours or increase, or in the case of ozone, the situation is likely to recur within the next twenty-four hours unless control actions are taken.
Once declared, any status reached by application of these criteria will remain in effect until the criteria for that level are no longer met. At such time, the next lower status will be assumed.
N.D. Admin Code tit. 33.1, art. 33.1-15, ch. 33.1-15-11, tbl. 6