020-2 Wyo. Code R. §§ 2-10 - Ambient Standards for Lead
(a) The primary and secondary ambient air quality standards for lead (Pb) and its compounds are 0.15 micrograms per cubic meter, arithmetic mean concentration over a 3-month period, measured in the ambient air as Pb either by:
(i) A reference method based on 40 CFR Part 50, Appendix G (Reference Method for the Determination of Lead in Suspended Particulate Matter Collected From Ambient Air), and designated in accordance with 40 CFR Part 53 or;
(ii) An equivalent method designated in accordance with 40 CFR Part 53.
(b) The primary and secondary ambient air quality standards for Pb are met when the maximum arithmetic 3-month mean concentration for a 3-year period, as determined in accordance with Appendix R (Interpretation of the National Ambient Air Quality Standards for Lead) of 40 CFR Part 50, is less than or equal to 0.15 micrograms per cubic meter.
Notes
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