Re: RC: Drugs

[CMKSAGEHIL@aol.com]

In a message dated 5/13/99 1:56:53 PM Pacific Daylight Time, 
Linda_Merims@ne.3com.com writes:

<<  - the presence of a substance,  present  or  not present
 
 or
 
   - the presence of a substance AND the parts per million (or billion)
     of that substance? >>

Quantities (in whatever units) are indicated.

Heidi


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