Section 18 AAC 50.245 - Air quality episodes and advisories for air pollutants other than PM-2.5(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 6Concentrations Triggering an Air Quality Episode for Air Pollutants Other Than PM-2.5 Episode Type Air Pollutant Concentration in micrograms per cubic meter {and in ppm where applicable} Air alert Sulfur dioxide 365 (24-hour average) §0.14 ppm} PM-10 150 (24-hour average) PM-10 from wood 92 (24-hour average) burning (wood smoke control areas) Carbon monoxide 10,000 (8-hour average) §8.7 ppm} Air warning Sulfur dioxide 800 (24-hour average) §0.31 ppm} PM-10 350 (24-hour average) Carbon monoxide 17,000 (8-hour average) §15 ppm} Air emergency Sulfur dioxide 1,600 (24-hour average) §0.61 ppm} PM-10 420 (24-hour average) PM-10 from wood During an air alert, a burning (wood smoke concentration measured or control areas) predicted to exceed 92 (24-hour average), and to continue to increase beyond the concentration that triggered the air alert Carbon monoxide 34,000 (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) f 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, April 2015Authority:AS 46.03.020
AS 46.14.010
AS 46.14.020
AS 46.14.030
Sec. 30, ch. 74, SLA 1993