[ RadSafe ] New approved test methods for drinking water

[Egidi, Philip]

FedReg Notice today giving final approval for new test methods including rads...

https://www.gpo.gov/fdsys/pkg/FR-2017-07-27/pdf/2017-15380.pdf

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EPA has determined that Standard Methods 7500-Ra E and 7500-Ra E-07
are equally effective, relative to the approved GA method. EPA is therefore approving
Standard Methods 7500-Ra E and 7500- Ra E-07 method for determining radium-226 and radium-228 in drinking
water by gamma spectrometry.
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EPA has determined that Standard Method 7110 D-17 is equally as effective for gross alpha and gross
beta measurement as the approved EPA Method 900.0. The basis for this determination is discussed in Smith and
Wendelken (2017). EPA is therefore approving the use of Standard Method 7110 D-17 for gross alpha and gross beta
determination in drinking water.
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An additional ASTM Method D 7283-17 (ASTM 2017) was submitted for evaluation as an alternate test method to
the approved EPA Method 900.0 (USEPA 1980) for the analysis of gross alpha and gross beta activity in drinking
water. ASTM Method D 7283-17 involves the simultaneous analysis of gross alpha and gross beta activities by
liquid scintillation counting using alpha/beta discrimination.
EPA has determined that ASTM Method D 7283-17 is equally as effective for gross alpha and gross beta
measurement as the approved EPA Method 900.0. The basis for this determination is discussed in Smith and
Wendelken (2017). EPA is therefore approving the use of ASTM D 7283-17 for gross alpha and gross beta
determination in drinking water.
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PVE
Philip Egidi
Environmental Scientist
U.S. Environmental Protection Agency
Radiation Protection Division
Washington, DC
(202) 343-9186 (work)
(970) 209-2885 (Cell)

"The health of the people is the highest law."
Cicero (106 - 43 BC)