A. When the control officer determines that high concentrations of pollutants in the ambient air and/or weather conditions constitute an emergency risk to persons in the county, such determination shall be communicated promptly to the public and to the Director of the Arizona Department of Environmental Quality.
1. Criteria used for determining an emergency shall include the air pollutant concentration levels listed in Table 17.32.020.
2. Possible episode conditions shall include the progressively deteriorating air quality levels listed as Alert, Warning, and Emergency in Table 17.32.020. These criteria have been established to prevent, avoid, or reduce the significant harm level of air pollution. (Significant harm means increased morbidity or irreversible, incapacitating damage to the health of the citizenry.)
3. Weather forecasts of conditions which are likely to produce unusually high concentrations of air pollutants in a large area shall be communicated to the public when deemed appropriate by the control officer.
B. Upon the recommendation of the Director of the Arizona Department of Environmental Quality, the Governor of the state may, by proclamation, declare that an air pollution emergency exists in a specific area and may order appropriate curtailments of emissions as specified in 40 CFR 51, Appendix L to eliminate the emergency in the affected area.
Episode Stage* | |||||
Pollutant | Averaging Time | Alert | Warning | Emergency | Significant Harm |
Episode Stage* | |||||
Pollutant | Averaging Time | Alert | Warning | Emergency | Significant Harm |
SO 2 (ìg/m 3 ) | 24 hours | 800 | 1,600 | 2,100 | 2,620 |
PM 10 (ìg/m 3 ) | 24 hours | 350 | 420 | 500 | 600 |
CO (mg/m 3 ) | 8 hours | 17 | 34 | 46 | 57.5 |
CO (mg/m 3 ) | 4 hours | - | - | - | 86.3 |
CO (mg/m 3 ) | 1 hour | - | - | - | 144 |
O 3 (ppm) | 1 hour | 0.2 | 0.4 | 0.5 | 0.6 |
NO 2 (ìg/m 3 ) | 1 hour | 1,130 | 2,260 | 3,000 | 3,750 |
NO 2 (ìg/m 3 ) | 24 hours | 282 | 565 | 750 | 938 |
* Providing meteorological conditions are such that the pollutant concentration can be expected to remain at the designated levels for at least 12 hours.
(Ord. 1993-128 § 8, 1993; Ord. 1979-93 (part), 1979)