What does the second laboratory do with the split specimen when it is tested to reconfirm an adulterated test result?

What does the second laboratory do with the split specimen when it is tested to reconfirm an adulterated test result? § 40.179

As the laboratory testing the split specimen, you must test the split specimen for the adulterant detected in the primary specimen, using the criteria of §40.95 just as you would do for a primary specimen. The result of the primary specimen is reconfirmed if the split specimen meets these criteria.