Subject to the provisions of Sec. 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 Metabolites------------------------------------------------------------------------
Cutoff level
Drug or metabolites [nanograms
(ng)/mL]------------------------------------------------------------------------Marijuana metabolites................................... 50Cocaine metabolites..................................... 300Opiate metabolites...................................... 2000Phencyclidine (PCP)..................................... 25Amphetamines............................................ 1000------------------------------------------------------------------------