Section 18.50.246. Air quality episodes and advisories for PM-2.5.

	(a)  The department or a local air quality control program may declare an air quality episode and prescribe and publicize the actions to be taken if the concentration of PM-2.5 in the ambient air has reached, or is likely in the immediate future to reach, any of the concentrations established in Table 6a in this subsection. The episode thresholds and actions prescribed for any area that has a local air quality plan included in the State Air Quality Control Plan adopted by reference in 18 AAC 50.030 must be consistent with the emergency episode provisions included in that plan.  
                                   Table 6
         Concentrations Triggering an Air Quality Episode for PM-2.5
 Episode Type       Air Pollutant           Concentration in
                                       micrograms per cubic meter
  Air alert    PM 2.5                       35.5 (24-hour average)
 Air warning   PM 2.5                       55.5 (24-hour average)
Air emergency  PM 2.5                      150.5 (24-hour average)
	(b)  The department or a local air quality control program authorized by the department under AS 46.14.400 will declare a PM-2.5 air quality advisory if, in its judgment, PM-2.5 air quality or atmospheric dispersion conditions exist that might threaten public health.  
	(c)  If the department or a local air quality control program declares a PM-2.5 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.  

Authorities

46.03.020;46.14.010;46.14.020;46.14.030

Notes

Reference

18 AAC 50.065
18 AAC 50.075

Authority

AS 46.03.020 AS 46.14.010 AS 46.14.020 AS 46.14.030 Sec. 30, ch. 74, SLA 1993

History

Eff. 2/28/2015, Register 213