AMBIENT LEVELS OF AIR CONTAMINANTS
§ 139.31. General.
Sections 139.32 and 139.33 (relating to sampling and analytical procedures; and incorporation of Federal procedures) are applicable to methods for determining ambient levels of air contaminants.
Source The provisions of this § 139.31 adopted March 3, 1972, effective March 20, 1972, 2 Pa.B. 383.
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