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The Department of Transportation (DOT) requires all employees to be drug tested for pre-employment, post-accident and in some cases, at random. If an employee has tampered with a previous sample or the collection site has reasonable suspicion of foul play, the DOT can then require a Direct Observation Test. This
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The term Consortia/Third Party Administrator was coined by DOT with the rewrite of 49 CFR Part 40 back in 2001.  C/TPA’s providing DOT drug & alcohol testing services should be intimately familiar with program 49 CFR Part 40, read it over and read it over again.  Refer back to
Any drug test performed with any specimen (urine, hair, etc) should be tested with an initial screening method and then followed up with a confirmation test if the screening result is non negative.  The lab performs initial drug screening using immunoassay. An immunoassay is a test that uses antibodies
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