
Be Part of the Ultimate Safety & Compliance Community
Trending news, knowledge-building content, and more – all personalized to you!
For urine specimens, a specimen is considered adulterated if it is determined that:
For oral-fluid specimens, if a specimen exhibits abnormal characteristics (e.g., unusual odor or color), causes reactions or responses characteristic of an adulterant during initial or confirmatory drug tests, or contains an unidentified substance that interferes with the confirmatory analysis, then the lab may conduct validity testing.
This is found in Subpart F of Part 40.