1 Va. Admin. Code § 30-45-816 – Air testing: quality of standards and reagents.

A. The source of standards shall comply with 1VAC30-45-740 C.
B. The purity of each analyte standard and each reagent shall be documented by the laboratory through certificates of analyses from the manufacturer/vendor, manufacturer/vendor specifications, and/or independent analysis.
C. In methods where the purity of reagents is not specified, analytical reagent grade or higher quality, if available, shall be used.

§ 2.2-1105 of the Code of Virginia.

Derived from Virginia Register Volume 25, Issue 7, eff. January 1, 2009.