Standard Methods for the Examination of Water and Wastewater, American Public Health Association, American Waterworks Association, Water Pollution Control Federation, 1992
Methods for Determination of Inorganic Substances in Environmental Samples, United States Environmental Protection Agency, August 1993
Standard 41, Wastewater Recycle/Reuse and Water Conservation Devices, revised May 1983, NSF International
12 Va. Admin. Code § DOCUMENTS INCORPORATED BY REFERENCE (12VAC5-610)
Statutory Authority: §§ 32.1-12 and 32.1-164 of the Code of Virginia.