"Chip Jones" wrote in message
k.net...
The method madated by the FAA ala a DOT 49 CFR Part 40 random urine drug
test is called a GC/MS drug test. GC/MS drug testing has virtually *no*
false positives...

You can read all about it he
http://www.aviationmedicine.com/drugtest.htm

Nothing at that web page states that the test has a low false-positive rate.

The false-positive rate isn't even inherent in a test itself. Specificity is
an inherent property of a test--but even an excellent test with very high
specificity can still have an arbitrarily high false-positive rate if
applied to a population in which positive examples are sufficiently rare.
(The web page says nothing about the test's specificity either, by the way.)

Do you have support elsewhere for your "virtually no false positives" claim?

--Gary