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DOT Rule 49 CFR Part 40 Section 40.181

Subpart H - Split Specimen Tests

§ 40.181 What does the second laboratory do with the split specimen when it is tested to reconfirm a substituted test result?
As the laboratory testing the split specimen, you must test the split specimen using the confirmatory tests for creatinine and specific gravity, and using criteria set forth in § 40.93(b).
[65 FR 79526, Dec. 19, 2000, as amended 73 FR 35973, June 25, 2008]
Last updated: Wednesday, June 21, 2017