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Rule Title: AMBIENT AIR QUALITY STANDARD FOR HYDROGEN SULFIDE
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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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17.8.214    AMBIENT AIR QUALITY STANDARD FOR HYDROGEN SULFIDE

(1) No person shall cause or contribute to concentrations of hydrogen sulfide in the ambient air which exceed the following standard:

(a) hourly average: 0.05 ppm, one-hour average, not to be exceeded more than once per year.

(2) Measurement method: For determining compliance with this rule, hydrogen sulfide shall be measured by the methylene blue spectrophotometric method, as more fully described in "Methods of Air Sampling and Analysis, Second Edition" (1977) Method P and CAM 126-6, 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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