Link to an amendment published at 87 FR 71459, Nov. 22, 2022.

Subject to the provisions of § 26.31(d)(3)(iii), licensees and other entities may specify more stringent cutoff levels for drugs and drug metabolites than those in the table below and, in such cases, may report initial test results for only the more stringent cutoff levels. Otherwise, the following cutoff levels must be used for initial testing of urine specimens to determine whether they are negative for the indicated drugs and drug metabolites:

Initial Test Cutoff Levels for Drugs and Drug MetabolitesDrug or metabolites Cutoff level [nanograms (ng)/mL] Marijuana metabolites50 Cocaine metabolites300 Opiate metabolites2000 Phencyclidine (PCP)25 Amphetamines1000