Drug and Alcohol Testing Q&A - 2007

[ Home | 2007 Posts | Next | Previous | Up ]

An easy way of explaining screening vs confirmation levels

From: Dr. K
Password: orange
Date: 20 Dec 2007
Time: 07:24:32 -0800
Remote Name: 12.40.33.118

Comments

I frequently get the question from designated employer representatives (DERs): How a donor can have a THC level of, for example 20, and be reported as positive when the screening cut-off is 50?  I understand why this happens but when explaining to DERs etc. they have difficulty grasping it.  Does anyone have a good way to explain it in layman's terms?