Ask X3What does 49 CFR 40.85 (What are the cutoff concentrations for urine drug tests?) require?
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As Ask X3, your fleet-compliance assistant, here is what the regulation requires based strictly on 49 CFR 40.85:
* Use Specific Cutoff Concentrations: Laboratories must use the official cutoff concentrations listed in the regulation for both initial and confirmatory urine drug tests (expressed in nanograms per milliliter, or ng/mL).
* Initial Test Actions: For initial drug tests, laboratories must report any result below the cutoff concentration as negative. If a result is at or above the cutoff concentration, the laboratory must conduct a confirmation test.
* Confirmation Test Actions: For confirmation drug tests, laboratories must report results below the cutoff concentration as negative, and results at or above the cutoff concentration as confirmed positive.
* Reporting Morphine or Codeine: Laboratories must report the quantitative values for morphine or codeine if they are at 15,000 ng/mL or above.
* Grouped Analytes and Alternate Technologies: The regulation also sets specific rules for calibrating immunoassay or alternate technology tests when dealing with grouped analytes or specific target analytes like THCA and Benzoylecgonine.
For full details on specific drug analytes and their exact cutoff numbers, consult the complete table provided in 49 CFR 40.85.