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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 MetaboliteInitial Test Confirmation Test
(1) Marijuana metabolites(i) Delta-9-tetrahydrocannabinol-9-carboxylic acid (THC)5015
(2) Cocaine metabolites(Benzoylecgonine)300150
(3) Phencyclidine (PCP)2525
(4) Amphetamines(i) Amphetamine(ii) Methamphetamine1000500500 (Specimen must also contain amphetamine at a concentration of greater than or equal to 200 ng/mL
(5) Opiate metabolites(i) Codeine(ii) Morphine

(iii) 6acetylmorphine


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.

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