Oklahoma Administrative Code
Title 310 - Oklahoma State Department of Health
Chapter 638 - Drug and Alcohol Testing
Subchapter 1 - General Provisions
Section 310:638-1-7 - Cutoff levels for drug confirmation testing in urine

Universal Citation: OK Admin Code 310:638-1-7

Current through Vol. 42, No. 1, September 16, 2024

(a) All specimens identified as positive on the initial test shall be confirmed using gas chromatography/mass spectrometry (GC/MS), or an equivalent accepted method of equal or greater accuracy as approved by the Commissioner of Health, at the following cutoff levels for these drugs or their metabolites. All confirmations shall be by quantitative analysis. Concentrations which exceed the linear region of the standard curve shall be documented in the testing facility record as "greater than the highest standard curve value."

(1) marijuana metabolites: 15 ng/ml (Delta-9-tetrahydrocannabinol-9-carboxylic acid)

(2) cocaine metabolites: 150 ng/ml (Benzoylecgonine)

(3) opiates and metabolites: 2000 ng/ml; opiates and metabolites include the following:
(A) codeine;

(B) morphine;

(C) heroin (10 ng/ml for tests for 6-Acetylmorphine when the morphine concentration exceeds 2000 ng/mL);

(4) semi-synthetic and synthetic narcotics: 300 ng/ml
(A) hydrocodone;

(B) hydromorphone;

(C) meperidine; (confirmatory test level of 500 ng/ml shall be used for meperidine)

(D) methadone;

(E) oxycodone;

(F) propoxyphene;

(5) phencyclidine: 25 ng/ml

(6) amphetamines: 500 ng/ml; amphetamines include the following:
(A) amphetamines;

(B) methamphetamines; (Specimen must also contain amphetamine at a concentration of greater than 200 ng/mL)

(C) methylenedioxyamphetamine;

(D) methylenedioxymethamphetamine;

(E) phentermine.

(7) barbiturates: 300 ng/ml; barbiturates include the following:
(A) amobarbital;

(B) butalbital;

(C) pentobarbital;

(D) secobarbital;

(8) benzodiazepines: 300 ng/ml; benzodiazepines include the following:
(A) diazepam;

(B) chlordiazepoxide;

(C) alprazolam;

(D) clorazepate; and

(9) methaqualone: 300 ng/ml.

(b) These test levels are subject to change by the Department as advances in technology or other considerations warrant identification of these 'substances at other concentration.

Added at 11 Ok Reg 4339, eff 7-14-94 (emergency); Added at 12 Ok Reg 517, eff 12-12-94 (emergency); Added at 12 Ok Reg 3069, eff 7-27-95; Amended at 16 Ok Reg 2514, eff 6-25-99; Amended at 17 Ok Reg 381, eff 11-1-99 (emergency); Amended at 17 Ok Reg 2045, eff 6-12-00; Amended at 18 Ok Reg 3592, eff 8-22-01 (emergency); Amended at 19 Ok Reg 1050, eff 5-13-02

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