TM 5-813-3/AFM 88-10, Voi 3
the largest systems. The standards provide a table set-
ting forth the minimum number of samples per month
as a function of population served, The samples must
be collected at points that are representative of condi-
tions in the distribution system.
c. Chemical and physical standards. Tables A-4 and
A-5 give standards applicable to all water supplies at
fixed facilities used for drinking purposes. Except as
denoted otherwise, these are the standards and cri-
teria established by the EPA.
d. Radioactivity standards.
(1) The maximum allowable levels for ra-
dium-226, radium-228, and gross alpha particle ra-
(a) Combined radium-226 and radium-2285
(b) Gross alpha particle activity (including ra-
dium-226 but excluding radon and uranium)15
(2) Maximum levels for beta particles and photon
(a) The average annual concentration of beta
dionuclides in drinking water shall not produce an an-
nual dose equivalent to the total body or any internal
organ greater than 4 mrem/year.
(b) Except for the radionuclides listed in table
A-6, the concentration of man-made radionuclides
causing 4 mrem 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 Concentration of Radionuclides in Air and
in Water for Occupational Exposures," NCRP Pub. No.
22-59. If two 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.