Federal Trucking Regulations
§ 40.87 What are the cutoff concentrations for initial and confirmation tests?
(a) As a laboratory, you must use the cutoff concentrations displayed in the following table for initial and confirmation drug tests. All cutoff concentrations are expressed in nanograms per milliliter (ng/mL). The table follows:
|Type of Drug or Metabolite||Initial Test||Confirmation Test|
|(1) Marijuana metabolites(i) Delta-9-tetrahydrocannabinol-9-carboxylic acid (THC)||50||15|
|(2) Cocaine metabolites(Benzoylecgonine)||300||150|
|(3) Phencyclidine (PCP)||25||25|
|(4) Amphetamines(i) Amphetamine(ii) Methamphetamine||1000||500500 (Specimen must also contain amphetamine at a concentration of greater than or equal to 200 ng/mL|
|(5) Opiate metabolites(i) Codeine(ii) Morphine
Test for 6-AM in the specimen. Conduct this test only when specimen contains morphine
at a concentration greater than or equal to 2000 ng/mL.
(b) On an initial drug test, you must report a result below the cutoff concentration as negative. If the result is at or above the cutoff concentration, you must conduct a confirmation test.
(c) On a confirmation drug test, you must report a result below the cutoff concentration as negative and a result at or above the cutoff concentration as confirmed positive.
(d) You must report quantitative values for morphine or codeine at 15,000 ng/mL or above.