49 CFR 40.177 - What does the second laboratory do with the split specimen when it is tested to reconfirm the presence of a drug or drug metabolite?

§ 40.177 What does the second laboratory do with the split specimen when it is tested to reconfirm the presence of a drug or drug metabolite?

(a) As the laboratory testing the split specimen, you must test the split specimen for the drug(s)/drug metabolite(s) detected in the primary specimen.

(b) You must conduct this test without regard to the cutoff concentrations of § 40.87.

(c) If the test fails to reconfirm the presence of the drug(s)/drug metabolite(s) that were reported positive in the primary specimen, you must conduct validity tests in an attempt to determine the reason for being unable to reconfirm the presence of the drug(s)/metabolite(s). You should conduct the same validity tests as you would conduct on a primary specimen set forth in § 40.91.

(d) In addition, if the test fails to reconfirm the presence of the drug(s)/ drug metabolite(s) reported in the primary specimen, you may send the specimen or an aliquot of it for testing at another HHS-certified laboratory that has the capability to conduct another reconfirmation test.

[ 65 FR 79526, Dec. 19, 2000, as amended at 73 FR 35972, June 25, 2008]

Title 49 published on 07-Sep-2017 04:47

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 49 CFR Part 40 after this date.

  • 2017-01-23; vol. 82 # 13 - Monday, January 23, 2017
    1. 82 FR 7771 - Procedures for Transportation Workplace Drug and Alcohol Testing Programs: Addition of Certain Schedule II Drugs to the Department of Transportation's Drug-Testing Panel and Certain Minor Amendments
      GPO FDSys XML | Text
      DEPARTMENT OF TRANSPORTATION, Office of the Secretary
      Notice of proposed rulemaking.
      Comments to the notice of proposed rulemaking should be submitted by March 24, 2017. Late-filed comments will be considered to the extent practicable.
      49 CFR Part 40
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