§ 40.89 - What are the adulterant cutoff concentrations for initial and confirmation urine tests?

§ 40.89 What is validity testing, and are laboratories required to conduct it?

Cross Reference

Link to an amendment published at 88 FR 27643, May 2, 2023.

(a) Specimen validity testing is the evaluation of the specimen to determine if it is consistent with normal human urine. The purpose of validity testing is to determine whether certain adulterants or foreign substances were added to the urine, if the urine was diluted, or if the specimen was substituted

are the adulterant cutoff concentrations for initial and confirmation urine tests?

(a) As a laboratory, you must use the cutoff concentrations for the initial and confirmation adulterant testing as required by the HHS Mandatory Guidelines and you must use two separate aliquots—one for the initial test and another for the confirmation test.

(b) As a laboratory, you must conduct validity testing.

[65 FR 79526, Dec. 19, 2000, as amended at 66 FR 41951, Aug. 9, 2001;

report results at or above the cutoffs (or for pH, at or above or below the values, as appropriate) as adulterated and provide the numerical value that supports the adulterated result.

[73 FR 35970, June 25, 2008. Redesignated at 88 FR 27643, May 2, 2023]