A SO2 concentration of 800 µg/m3 (0.3 ppm), 24-hour average;
A PM10 concentration of 350 µg/m3, averaged over 24-hours, measured in accordance with the provisions of Appendix C of Title 40 Code of Federal Regulations part 58 revised as of July 1, 1989; or
A NO2 concentration of 1130 µg/m3 (0.6 ppm), 1-hour average; 282 µg/m3 (0.15 ppm), 24-hour average; and meteorological conditions are such that the pollutant concentrations can be expected, unless control actions are taken, to remain at the above levels or increase over a period of twelve (12) or more hours.
A SO2 concentration of 1,600 µg/m3 (0.6 ppm), 24-hour average;
A PM10 concentration of 420 µg/m3, averaged over 24-hours, measured in accordance with the provisions of Appendix C of Title 40 Code of Federal Regulations part 58 revised as of July 1, 1989; or
A NO2 concentration of 2,260 µg/m3 (1.2 ppm), 1-hour average; 565 µg/m3(0.3 ppm), 24-hour average; and meteorological conditions are such that pollutant concentrations can be expected, unless control actions are taken, to remain at the above levels or increase over a period of twelve (12) or more hours.
A SO2 concentration of 2,100 µg/m3 (0.8 ppm), 24-hour average;
A PM10 concentration of 500 µg/m3, averaged over 24-hours, measured in accordance with the provisions of Appendix C of Title 40 Code of Federal Regulations part 58 revised as of July 1, 1989; or
A NO2 concentration of 3,100 µg/m3 (1.6 ppm); 1-hour average; 750 µg/m3 (0.4 ppm), 24-hour average; and meterological conditions are such that this condition can be expected to continue for twelve (12) or more hours.
Table I
Steps for Air Pollution Reduction at an Industrial Air Pollution Alert
Table II
Steps for Air Pollution Reduction at an Air Pollution Industrial Warning
Table III
Steps for Air Pollution Reduction at an Industrial Air Pollution Emergency
Oxidant (O3) 800 µg/m3 (0.4 ppm), 1-hour average; and meteorological conditions are such that pollutant concentrations can be expected, unless control actions are taken, to recur the next calendar day.
Oxidant (O3): 1,000 µg/m3 (0.5 ppm), 1-hour average; and meteorological conditions are such that this condition can be expected to recur the next calendar day.
Conn. Agencies Regs. § 22a-174-6