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Virginia Administrative Code
Title 1. Administration
Agency 30. Department of General Services
Chapter 45. Certification for Noncommercial Environmental Laboratories
11/21/2024

1VAC30-45-812. Air testing: analytical variability/reproducibility.

Matrix spike duplicates (MSDs) or laboratory duplicates shall be analyzed at a minimum of one in 20 samples per sample batch. The laboratory shall document their procedure to select the use of appropriate types of spikes and duplicates. The selected samples(s) shall be rotated among sampling points or sampling locations so that various sample matrix problems may be noted and/or addressed. Poor performance in the spikes and duplicates may indicate a problem with the sample composition and shall be reported to the client.

Statutory Authority

§ 2.2-1105 of the Code of Virginia.

Historical Notes

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

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