105 CMR, § 675.008 - Action Air Levels for Carbon Monoxide and Nitrogen Dioxide
(A) Air levels to be referred to as
correction air levels shall be a single air sample exceeding 30 parts per
million (ppm) for carbon monoxide and of 0.5 ppm for nitrogen
dioxide.
(B) Air levels to be
referred to as notification air levels shall be a single air sample exceeding
60 parts per million (ppm) or six consecutive air samples which exceed 30 parts
per million (ppm) for carbon monoxide and a single air sample exceeding one
part per million (ppm) or six consecutive samples which exceed 0.5 parts per
million (ppm) for nitrogen dioxide.
(C) Air levels to be referred to as
evacuation air levels shall be a single air sample exceeding 125 parts per
million (ppm) for carbon monoxide and two ppm for nitrogen dioxide.
Notes
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