Re: Acceptance of Data Results

[Tom Hazlett <tomhaz@AOL.COM>]

Please keep this thread public.  I  will likely learn a lot from the 

discussion.  I'm always asked about the minimum detectable activity of 

this ad that, and I need to know how to model and calculate MDA.



Regards

Tom Hazlett



photond@EARTHLINK.NET wrote:



>Good day to all!

>Currently, the t-test also called the determination of Noramlized Absolute

>Difference (NAD) is applied to the sample results at my radiochemsitry lab. We

>find a problem with samples at or near background (2 to 3 pCi/g). We are

>directed to use the USACE guidance document, but it is unclear as to this

>problem. 

>If anyone knows of a more detailed discussion on the use of such tests on

>samples and lab replicates, I would be interested. 

>Please respond directly to me.

>DAN Mackney

>Radiochemistry Manager

>FUSRAP Maywood Storage Site

>Maywood NJ 07607

>2018434683

>photond@earthlink.net

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