DHS 157.96(1)(a)1.1. The maximum contaminant level for radium-226 and radium-228 in community water systems is 5 pCi/L. DHS 157.96(1)(a)2.2. The maximum contaminant level for gross alpha particle activity in community water systems is15 pCi/L, including radium-226, but excluding radon and uranium. DHS 157.96(1)(b)(b) Beta particle and photon radioactivity from man-made radionuclides in community water systems. DHS 157.96(1)(b)1.1. The average annual concentration of beta particle and photon radioactivity from man-made radionuclides in drinking water may not produce an annual dose equivalent to the total body or any internal organ greater than 0.04 millisievert (4 millirem). DHS 157.96(1)(b)2.2. Except for the radionuclides listed in Table DHS 157.96A, the concentration of man-made radionuclides causing 0.04 millisievert (4 millirem) total body or organ dose equivalents shall be calculated on the basis of a 2-liter per day drinking water intake using the 168 hour data listed in “Maximum Permissible Body Burdens and Maximum Permissible Concentrations of Radionuclides in Air or Water for Occupational Exposure”, National Council on Radiation Protection and Measurements Report No. 22. If 2 or more radionuclides are present, the sum of their annual dose equivalent to the total body or to any organ may not exceed 0.04 millisievert (4 millirem). DHS 157.96 NoteNote: The publication “Maximum Permissible Body Burdens and Maximum Permissible Concentrations of Radionuclides in Air or Water for Occupational Exposure” in the National Council on Radiation Protection and Measurements Report No. 22, is the same document as Handbook 69 published by the National Bureau of Standards and which the Department received permission from the Attorney General and the Legislative Reference on March 22, 1982 to incorporate into ch. HSS 157 by reference. The reference is no longer available through the federal government and the National Bureau of Standards no longer exists. However, the document may be consulted at the Department’s Radiation Protection Section at 1 W. Wilson St. in Madison, WI or the Legislative Reference Bureau and may be ordered from: NCRP, 7910 Woodmont Avenue, Suite 800, Bethesda MD, 20814.
Table DHS 157.96A
Average Annual Concentrations Assumed to
Produce a Total Body or Organ Dose of
0.04 Millisievert (4 Millirem)/Year
DHS 157.96(2)(a)(a) Standard radionuclide. The following methods used to measure radionuclides and specified in “Prescribed Procedures for Measurement of Radioactivity in Drinking Water” EPA-600/4-80- 032 shall be used to determine compliance with sub. (1), except in cases where alternative methods have been approved under sub. (4): DHS 157.96(2)(b)(b) Other radionuclides. When the identification and measurement of radionuclides other than those listed in par. (a) is required, the following references shall be used, except in cases where alternative methods have been approved under sub. (4): DHS 157.96(2)(b)1.1. Procedures for Radiochemical Analysis of Nuclear Reactor Aqueous Solutions, H. DHS 157.96(2)(b)2.2. Section 4.5.4 of the Health and Safety Laboratory Procedure Manual pertaining to testing water, ERDA-HASL 300, 28th Edition. DHS 157.96 NoteNote: 1. The Procedures for Radiochemical Analysis of Nuclear Reactor Aqueous Solutions, H. L. Krieger and S. Gold, EPA-R4-73-014, May 1973, is available upon written request to: Department of Health Services, Radiation Protection Section, PO Box 2659, Madison WI 53701-2659.
DHS 157.96(2)(c)1.1. For the purpose of monitoring radioactivity concentrations in drinking water, the required sensitivity of the radioanalysis is defined in terms of a detection limit. The detection limit shall be that concentration that may be counted with a precision of plus or minus 100% at the 95% confidence level, where 1.96 is the standard deviation of the net counting rate of the sample. DHS 157.96(2)(c)2.2. To determine compliance with sub. (1) (a) 1., the detection limit may not exceed one pCi/L. To determine compliance with sub. (1) (a) 2., the detection limit may not exceed 3 pCi/L.
