18 Va. Admin. Code § 15-30-651 – Composite dust sampling.

1. Composite dust samples must consist of at least two subsamples;
2. Every component that is being tested must be included in the sampling; and
3. Composite dust samples must not consist of subsamples taken from more than one type of component.

Composite dust sampling may be used in situations specified in 18VAC15-30-520 through 18VAC15-30-610. If such sampling is conducted, the following conditions apply:

Statutory Authority

§ 54.1-501 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 19, Issue 24, eff. October 1, 2003; amended, Virginia Register Volume 42, Issue 8, eff. January 2, 2026.