18 Va. Admin. Code § 15-21-9999
NIOSH Method 7400, NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, NIOSH, August 15, 1994
NIOSH Method 7402, NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, NIOSH, August 15, 1994
NIOSH Method 9002, NIOSH Manual of Analytical Methods (NMAM) Fourth Edition, NIOSH, August 15, 1994
Test Method: Method for the Determination of Asbestos in Bulk Building Materials, EPA Office of Research and Development, (EPA 600-R-93-116, July 1993)