Section Env-Dw 703.03 - Beta Particle and Photon Radioactivity from Man-Made Sources(a) The average annual concentration of beta particle and photon radioactivity from man-made radionuclides in drinking water provided by a community water system shall not produce an annual dose equivalent to the total body or any internal organ greater than 4 mrem/year.(b) In accordance with 40 CFR 141.66(d)(2) except for the radionuclides listed in Table 703-2, below, the concentration of man-made radionuclides causing 4 millirem total body organ dose equivalents shall be calculated on the basis of an intake of 2 liters of drinking water per day using 168 hour data as listed in "Maximum Permissible Body Burdens and Maximum Permissible Concentrations of Radionuclides in Air and in Water for Occupational Exposure," National Bureau of Standards Handbook 69 as amended August 1963, U.S. Department of Commerce.(c) If 2 or more radionuclides are present, the sum of their annual dose equivalent to the total body or to any organ shall not exceed 4 mrem/year.(d) The average annual concentrations assumed to produce a total body or organ dose of 4 mrem/year shall be as specified in Table 703-2, below: Table 703-2: Average Annual Concentrations Assumed to Produce a Total Body or Organ Dose of 4 mrem/year
Radionuclide | Critical Organ | Average Annual Concentration (pCi/L) |
Tritium | Total Body | 20,000 |
Strontium 90 | Bone Marrow | 8 |
(e) Compliance shall be determined in accordance with Env-Dw 707, Env-Dw 708, and Env-Dw 710.N.H. Admin. Code § Env-Dw 703.03
(See Revision Note #1 at chapter heading for Env-Dw 700) #9699, eff 5-1-10
Amended by Volume XXXVIII Number 50, Filed December 13, 2018, Proposed by #12665, Effective 1/1/2019, Expires 1/1/2029.Amended byVolume XXXIX Number 28, Filed July 11, 2019, Proposed by #12819, Effective 6/28/2019, Expires 6/28/2029.