Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, EPA Publication SW-846, U.S. Environmental Protection Agency, Third Edition as amended by Final Updates I, II, IIA, IIB, IIIA, IIIB, IVA, and IVB, National Technical Information Service (NTIS), 5285 Port Royal Road, Springfield, VA 22161, (703) 605-6000 or (800) 553-6847, http://www.epa.gov/SW-846.
Method 504.1, rev. 1.1 (August 1995)
9 Va. Admin. Code § DOCUMENTS INCORPORATED BY REFERENCE (9VAC25-120)