MONTEREY BAY UNIFIED AIR POLLUTION CONTROL DISTRICT

RULE 708 - EPISODE CRITERIA*
(in parts per million parts of air)

  1. Stage Trigger Levels.

Pollutant Averaging Time  Stage 1 Stage 2 Stage 3
OXIDANT 

(as Ozone) 
1 Hour .20 ppm .35 ppm .50 ppm for 1 hour and persist for additional hour.
  1. First-Stage:
    Close approach to maximum allowable concentration for the population at large.  Still safe but approaching a point where preventive action is required.
  2.  Second-Stage:
    Air contamination level at which a health menace exists in a preliminary state.
  3. Third-Stage:
    Air Contamination level at which a dangerous health menace exists.

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* If excessive concentration of pollutants for which criteria have not been established occur or are predicted to occur, appropriate abatement actions shall be taken by the affected air pollution control district after consultation with the State Air Resources Board.

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