49 CFR § 40.181 Procedures for Transportation Workplace Drug and Alcohol Testing Programs

§ 40.181 What does the second laboratory do with the split specimen when it is tested to reconfirm a substituted test result?

Current through Sep 25, 2026 · Read all of Part 40

⚠ 1 pending change to Part 40

As the laboratory testing a urine split specimen, you must test the split specimen using the confirmatory tests for creatinine and specific gravity, using the criteria set forth in § 40.88.

[88 FR 27646, May 2, 2023]

← § 40.179 What does the second laboratory do with the split specimen when it is tested to reconfirm an adulterated test result?§ 40.183 What information do laboratories report to MROs regarding split specimen results? →