7 Del. Admin. Code § 1115-2.0
Current through Register Vol. 28, No. 1, July 1, 2024
Section 1115-2.0 - Stages and Criteria2.1 Air Pollution Watch - An Air Pollution Watch shall be activated by the Department when the National Weather Service issues an Air Stagnation Advisory which includes areas of the State of Delaware or when the Department Meteorologist forecasts an air stagnation period for the State, and when such air stagnation is forecast to continue for the next 36 hours.2.2 Alert-Stage I - An Alert-State I status shall be declared when any one of the following conditions occur at any air quality monitoring station in the State of Delaware and when a condition of air stagnation is forecast to continue for at least an additional 12 hours: 2.2.1 The six-hour average concentration of sulfur dioxide is equal to or exceeds 0.30 parts per million.2.2.2 The 24-hour average of total suspended particulates is equal to or exceeds 375 µg/m3.2.2.3 The product of the 24-hour average ambient air concentration of sulfur dioxide in µg/m3 and the 24-hour average total suspended particulates in µg/m3 is equal to or exceeds 65x103.2.2.4 The 24-hour average of PM10 is equal to or exceeds 350 µg/m3.2.3 Alert-Stage II - An Alert-Stage II status shall be declared when any one of the following conditions occur at any air quality monitoring station in the State of Delaware and when a condition of air stagnation is forecast to continue for at least an additional 12 hours. 2.3.1 The six-hour average concentration of sulfur dioxide is equal to or exceeds 0.50 parts per million.2.3.2 The 24-hour average of total suspended particulates is equal to or exceeds 625 µg/m3.2.3.3 The product of the 24-hour average ambient air concentration of sulfur dioxide in µg/m3 and the 24-hour average total suspended particulates in µg/m3 is equal to or exceeds 261x103.2.3.4 The four-hour average concentration of ozone is equal to or exceeds 0.25 parts per million.2.3.5 The 24-hour average concentration of nitrogen dioxide is equal to or exceeds 0.30 parts per million.2.3.6 The eight-hour average of carbon monoxide is equal to or exceeds 30.0 parts per million.2.3.7 The 24-hour average of PM10 is equal to or exceeds 420 µg/m3.2.4 Alert-Emergency Stage - An Alert-Emergency Stage status shall be declared when any one of the following conditions occur at any air quality monitoring station in the State of Delaware and when a condition of air stagnation is forecast to continue for at least an additional 12 hours. 2.4.1 The 24-hour average concentration of sulfur dioxide is equal to or exceeds 0.60 parts per million.2.4.2 The 24-hour average of total suspended particulates is equal to or exceeds 875 µg/m3.2.4.3 The product of the 24-hour average ambient air concentration of sulfur dioxide in µg/m3 and the 24-hour average concentration of total suspended particulates in µg/m3 is equal to or exceeds 393x103.2.4.4 The eight-hour average concentration of carbon monoxide is equal to or exceeds 40.0 parts per million.2.4.5 The four-hour average concentration of ozone is equal to or exceeds 0.35 parts per million.2.4.6 The 24-hour average concentration of nitrogen dioxide is equal to or exceeds 0.40 parts per million.2.4.7 The 24-hour average of PM10 is equal to or exceeds 500 µg/m3.2.5 Termination - Once declared, any status reached by application of the criteria will remain in force until the criteria for that status are no longer met. At such time the applicable lower status shall be declared. Termination shall be declared when concentrations are less than Stage I and a weather advisory has been received that the air stagnation period is ended. 02/01/1981
7 Del. Admin. Code § 1115-2.0