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Rule Title: AMBIENT AIR QUALITY STANDARDS FOR CARBON MONOXIDE
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Department: ENVIRONMENTAL QUALITY, DEPARTMENT OF
Chapter: AIR QUALITY
Subchapter: Ambient Air Quality
 
Latest version of the adopted rule presented in Administrative Rules of Montana (ARM):

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17.8.212    AMBIENT AIR QUALITY STANDARDS FOR CARBON MONOXIDE

(1) No person shall cause or contribute to concentrations of carbon monoxide in the ambient air which exceed any of the following standards:

(a) Hourly average: 23 ppm, hourly average, not to be exceeded more than once per year.

(b) Eight-hour average: 9 ppm, eight-hour average, not to be exceeded more than once per year.

(2) Measurement method: For determining compliance with this rule, carbon monoxide shall be measured by the nondispersive infrared method, as more fully described in 40 CFR Part 50, Appendix C (1979), or by an approved equivalent method.

History: 75-2-111, 75-2-202, MCA; IMP, 75-2-202, MCA; NEW, 1980 MAR p. 2399, Eff. 8/15/80; TRANS, from DHES, 1996 MAR p. 2285.


 

 
MAR Notices Effective From Effective To History Notes
8/15/1980 Current History: 75-2-111, 75-2-202, MCA; IMP, 75-2-202, MCA; NEW, 1980 MAR p. 2399, Eff. 8/15/80; TRANS, from DHES, 1996 MAR p. 2285.
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