Re: MDA vs Applicable Limit

["Kevin Wright" <kswusa@hotmail.com>]

Make sure to evaluate your technical specifications, licenses, procedures, 
contracts or other applicable documents.  Sometimes, commitments are made to 
specific regulators or on specific subjects (e.g. It is not uncommon for a 
remediation work plan or contract to require MDA values not to exceed 0.5 of 
the assigned limit.  Air samples must meet at least 0.3 DAC to ensure the 
area does not require posting. etc.)


>From: "J. L. Alvarez" <jalvarez@auxier.com>
>Reply-To: radsafe@romulus.ehs.uiuc.edu
>To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
>Subject: Re: MDA vs Applicable Limit
>Date: Tue, 16 Jan 2001 13:17:12 -0600 (CST)
>
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>Having an MDA at 10% of the applicable limit is a good rule of thumb, see
>
>Fong, S. H. and J. L. Alvarez, When is a Lower Limit of Detection Low 
>Enough?,
>Health Physics; 72(2): 282-285, 1997
>
>for an explanation of the basis behind the rule of thumb.
>
>Mitch Davis wrote:
>
> > Good Afternoon:
> >
> > Does anyone know of a requirement or guidance document that specifies 
>that
> > in a particular counting system what percentage of the applicable limit 
>the
> > MDA (detection limit) must be?  10% sticks in my head (ie MDA must be 
>10% of
> > the applicable limit).  Any thoughts?  Thank you for your assistance.  
>You
> > may reply directly to me at the below address.
> >
> > Mitchell Davis, RRPT
> > RSO, NORM Decon Services, LLC
> > mdavis@normdecon.com
> >
> > ************************************************************************
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