Section 1200-03-15-.02 - EPISODE CRITERIA(1) Conditions justifying the proclamation of an air pollution alert, air pollution warning, or air pollution emergency shall be deemed to exist when the Technical Secretary will be guided by the criteria in the remaining paragraphs of this rule.(2) "Air Pollution Forecast": An internal watch by the Division of Air Pollution Control shall be actuated by a National Weather Service advisory that Atmospheric Stagnation Advisory is in effect or the equivalent local forecast or stagnant atmospheric conditions.(3) "Air Pollution Alert": The Alert level is that concentration of pollutions at which emissions reductions must begin. An Alert will be declared when any one of the following levels is reached at any monitoring site:(a) SO2-800 ug/m3(0.3 ppm), 24-hour average.(b) PM10-350 ug/m3, 24-hour average.(d) CO--17 mg/m3 (15 ppm), 8-hour average.(e) Ozone (O3)--400 ug/m3 (0.2 ppm)--1 hr. average.(f) NO2--1130 ug/m3 (0.6 ppm), 1-hr. average; 282 ug/m3 (0.15 ppm), 24-hour average. And meteorological conditions are such that pollutant concentrations can be expected to remain at the above levels for twelve (12) or more hours or increase unless control actions are taken, or in the case of ozone, the situation is likely to reoccur within the next twenty-four (24) hours unless control actions are taken.
(4) "Air Pollution Warning": 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: (a) SO2-1,600 ug/m3(0.6 ppm), 24-hour average.(b) PM10-420 ug/m3, 24-hour average.(d) CO-34 mg/m3 (30 ppm), 8-hour average.(e) Ozone (03)-800 ug/m3 (0.4 ppm), 1-hour average.(f) NO2-2,260 ug/m3 (1.2 ppm)--1 hour average; 565 ug/m3 (0.3 ppm), 24-hour average. And meteorological conditions are such that pollutant concentrations can be expected to remain at the above levels for twelve (12) or more hours or increase unless control actions are taken, or in the case of ozone, the situation is likely to reoccur within the next twenty-four (24) hours unless control actions are taken.
(5) "Air Pollution Emergency": The emergency level indicates that air quality is continuing to degrade to a level which could cause an unreasonable risk to public health, 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: (a) SO2-2,100 ug/m33 (0.8 ppm), 24-hour average.(b) PM10-500 ug/m3, 24-hour average.(d) CO-46 mg/m3 (40 ppm), 8-hour average.(e) Ozone (03)-1,000 ug/m3 (0.5 ppm), 1-hour average.(f) NO2--3,000 ug/m3 (1.6 ppm) 1-hour average; 750 ug/m3 (0.4 ppm), 24-hour average. And meteorological conditions are such that this condition can be expected to continue for twelve (12) or more hours, or in the case of ozone, the situation is likely to reoccur within the next twenty-four (24) hours unless control actions are taken.
(6) "Terminations": 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.Tenn. Comp. R. & Regs. 1200-03-15-.02
Original rule filed January 10, 1977; effective February 9, 1977. Amendment filed May 12, 1993; effective June 26, 1993.Authority: T.C.A. §§ 68-201-105 and 4-5-202 et. seq.