- (a) The department or a local air quality control program may declare an air quality episode and prescribe and publicize curtailment action if the concentration of an air pollutant in the ambient air has reached, or is likely in the immediate future to reach, any of the concentrations established in Table 6 in this subsection. Table 6 Concentrations Triggering an Air Quality Episode for Air Pollutants Other Than PM-2.5. Episode TypeAir PollutantConcentration in micrograms per cubic meter { and in ppm where applicable} Air alertSulfur dioxide365 (24-hour average) {0.14 ppm} PM-10 150 (24 - hour average) PM-10 from wood burning (wood smoke control areas) 92 (24 - hour average)Carbon monoxide10,000 (8-hour average) {8.7 ppm} Air warningSulfur dioxide800 (24-hour average) {0.31 ppm} PM - 10 350 (24 - hour average) Carbon monoxide17,000 (8-hour average) {15 ppm} Air emergencySulfur dioxide1,600 (24-hour average) {0.61 ppm} PM-10 420 (24 - hour average) PM-10 from wood burning (wood smoke control areas)During an air alert, a concentration measured or predicted to exceed 92 (24-hour average), and to continue to increase beyond the concentration that triggered the air alert Carbon monoxide34,000 (8-hour average) {30 ppm}
- (b) The department or a local air quality control program will declare an air quality advisory if, in its judgment, air quality or atmospheric dispersion conditions exist that might threaten public health.
(c) If the department or a local air quality control program declares an air quality advisory under (b) of this section, the department or a local air quality control program will
- (1) request voluntary emission curtailments from any person issued a permit under this chapter whose stationary source's emissions might impact the area subject to the advisory; and
- (2) publicize actions to be taken to protect public health.
- (d) Nothing in this section alters a local government's powers or obligations under a local air quality control program established under AS 46.14.400 and other local laws, as applicable.
(Eff. 1/18/97, Register 141; am 10/1/2004, Register 171; am 2/28/2015, Register 213)
Authority: AS 46.03.020, AS 46.14.020