Ask X3What does 49 CFR 40.87 (What validity tests must laboratories conduct on primary urine specimens?) require?
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As a motor-carrier owner, here is what 49 CFR 40.87 requires laboratories to do for validity testing on primary urine specimens:
* Creatinine Concentration: The lab must test the creatinine concentration on every primary specimen.
* Specific Gravity: If the creatinine concentration is found to be less than 20 mg/dL, the lab must also test the specific gravity.
* pH Levels: The lab must determine the pH of every primary specimen.
* Oxidizing Adulterants: The lab must run one or more validity tests for oxidizing adulterants on every primary specimen.
* Additional Tests: The lab must perform extra validity tests if they spot abnormal physical characteristics, see reactions/responses typical of an adulterant during drug tests (such as unusual responses or the non-recovery of internal standards), or encounter a possible unidentified interfering substance or adulterant.
* Invalid Specimens and MRO Contact: If the lab determines a specimen is invalid and HHS guidelines require it, the lab and the Medical Review Officer (MRO) must work together to decide if sending the primary specimen to another HHS-certified laboratory would help report a positive or adulterated result.