§ 40.87 What are the cutoff concentrations for initial and confirmation tests?
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- § 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 metabolities
(i) Delta-9-tetrahydrocannabinol-9-caroxylic acid (THC) |
50
|
15
|
|
(2) Cocaine metabolities (Benzoylecgonine)
|
300 |
150 |
|
(3) Phencyclidine (PCP)
|
25 |
25 |
|
(4) Amphetamines
(i) Amphetamine
(ii) Methamphetamine |
1000 |
500
500 (Specimen must also contain amphetaime at a concentration of greater than or equal to 200 ng/mL
|
|
(5) Opiate metabolities
(i) Codeine
(ii) Morphine
(iii) 6acety1morphine |
2000 |
2000
2000
10 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.