Current through Register Vol. 43, No. 39, September 26, 2024
(a) Conditions
justifying the proclamation of an air pollution alert, air pollution warning,
or air pollution emergency shall exist whenever the director determines that
the accumulation of air contaminants at any sampling location has attained
levels which could, if such levels are sustained or exceeded, threaten the
public health. In making this determination, the following criteria shall guide
the director:
(1) An air pollution forecast,
which is the issuance of a weather bureau high pollution potential advisory, or
equivalent indication by any local weather bureau meteorologist that a stagnant
atmospheric condition will exist for 36 consecutive hours.
(2) An air pollution alert, where the average
sulphur dioxide level for the previous 24 consecutive hours equals 0.3 ppm (800
ug/m3 or the PM10 level for the previous 24 consecutive hours equals 350 ug/m3,
or the average carbon monoxide level for the previous eight consecutive hours
equals 15 ppm, or the average ozone level for the preceding one hour equals 0.1
ppm, or the average nitrogen dioxide concentration for the preceding one hour
equals 0.6 ppm, or the average nitrogen dioxide concentration for the preceding
24 consecutive hours equals 0.15 ppm, and the local meteorologist predicts no
major changes in existing adverse meteorological conditions for at least an
additional 12 hours.
(3) Air
pollution warnings, where the average sulphur dioxide level for the previous 24
consecutive hours equals 0.60 ppm, (1600 ug/m3), or the PM10 level for the
previous 24 consecutive hours equals 420 ug/m3, or the average carbon monoxide
level for the previous eight consecutive hours equals 30 ppm, or the average
ozone level for the previous one hour equals 0.4 ppm, or the average nitrogen
dioxide concentration for the previous one hour equals 1.2 ppm, or the average
nitrogen dioxide concentration for the previous 24 consecutive hours equals 0.3
ppm, and the local meteorologist predicts no major changes in existing adverse
meteorological conditions for the next 12 hours.
(4) An air pollution emergency, where the
average sulphur dioxide level for the previous 24 consecutive hours equals 0.8
ppm (2100 ug/m3), or the PM10 level for the previous 24 consecutive hours
equals 500 ug/m3, or the average ozone level for the previous one hour equals
0.5 ppm, or the average carbon monoxide level for the previous eight
consecutive hours equals 40 ppm, or the average nitrogen dioxide concentration
for the previous one hour equals 1.6 ppm or the average nitrogen dioxide
concentration for the previous 24 consecutive hours equals 0.4 ppm, and the
local meteorologist predicts no major changes in existing adverse
meteorological conditions for at least an additional 12 hours.
(b) Any status prescribed in
subsection (a) may be declared by the director on the basis of deterioration of
air quality to the criteria levels alone without the issuance of a high air
pollution potential advisory or equivalent advisory from a local weather bureau
meteorologist if deemed necessary to protect the public health.
(c) Once declared, any status established on
the basis of this regulation shall remain in effect until the criteria for that
level are no longer met. At such time the next lower status will be assumed.
