What does 49 CFR 40.89 (What are the adulterant cutoff concentrations for initial and confirmation urine tests?) require?

Based on 49 CFR 40.89, the regulation requires laboratories performing urine tests to do the following:

* Use required cutoff concentrations: You must use the adulterant cutoff concentrations for both initial and confirmation tests as required by the HHS Mandatory Guidelines.

* Use two separate aliquots: You must use one aliquot for the initial test and a separate aliquot for the confirmation test.

* Report adulterated results properly: If a test result is at or above the cutoffs (or at, above, or below for pH values), you must report the sample as adulterated and provide the specific numerical value that supports that result.