49 C.F.R. § 40.181 What does the second laboratory do with the split specimen when it is tested to reconfirm a substituted test result?
Title 49 - Transportation
As the laboratory testing the split specimen, you must test the split specimen using the criteria of §40.93(b), just as you would do for a primary specimen. The result of the primary specimen is reconfirmed if the split specimen meets these criteria.
Title 49: Transportation
PART 40—PROCEDURES FOR TRANSPORTATION WORKPLACE DRUG AND ALCOHOL TESTING PROGRAMS
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?