020-2 Wyo. Code R. §§ 2-7 - Ambient Standards for Hydrogen Sulfide
(a) The ambient air
standards for hydrogen sulfide, measured by the mercuric chloride method,
methylene blue method, or by an equivalent method are:
(i) 70 micrograms H2S
per cubic meter, 1/2-hour average not to be exceeded more than 2 times per
year;
(ii) 40 micrograms
H2S per cubic meter, 1/2-hour average not to be exceeded
more than 2 times in any five consecutive days.
Notes
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(a) The ambient air standards for hydrogen sulfide, measured by the mercuric chloride method, methylene blue method, or by an equivalent method are:
(i) 70 micrograms H2S per cubic meter, ½-hour average not to be exceeded more than 2 times per year;
(ii) 40 micrograms H2S per cubic meter, ½-hour average not to be exceeded more than 2 times in any five consecutive days.