Petri Dishes for Air Sample Filter Transport?

["Erik C. Nielsen" <enielsen@iw.edwpub.com>]

Most petri dishes are polystyrene and are very vulnerable to static
electricity build up that will "lift" varying amounts of material off the
filter if not the filter itself.

I've seen the least "migration" on glassine envelopes (often used by stamp
collectors). Not as porous as a paper envelope and lower susceptability to
statice build up (but not immune).

>From: Michael P McDonald <mpmcdon@sandia.gov>
>Subject: Petri Dishes for Air Sample Filter Transport?
>
>     Our management is thinking about using plastic petri dishes (two 
>     piece) for transporting air sample filters to the counting labs 
>     instead of the standard paper coin envelopes which are now in use. 
>     They want to make this change in an effort to minimize the "transfer" 
>     of radioactive material from the filter medium to the paper envelope.


Erik Nielsen
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If it isn't in writing, it didn't happen. (anonymous lab auditor)
Standard employer denials and dissassociations apply.
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Erik C. Nielsen
Quanterra Environmental Services
13715 Rider Trail North
St. Louis, MO 63045

(314) 298-8566 ext 224
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Personal E-Mail  mailto:enielsen@iw.edwpub.com
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