Add to project

Projects

No projects yet

Export Official source

All sections

Browse regulation

Subpart B—Employer Responsibilities1

Subpart C—Urine Collection Personnel1

Subpart B—Drug Testing1

Subpart C—Alcohol Testing4

Subpart F—Drug Testing Laboratories6

Subpart G—Medical Review Officers and the Verification Process2

Subpart H—Split Specimen Tests1

Subpart J—Alcohol Testing Personnel1

Subpart O—Substance Abuse Professionals and the Return-to-Duty Process1

Regulationhistorical

49 CFR 40.95

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

Current as of 2022-10-01 Government source

Pipeline and Hazardous Materials Safety AdministrationOfficial agency material

View source

(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 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]