49 C.F.R. § 40.109 What documentation must the laboratory keep, and for how long?
Title 49 - Transportation
(a) As a laboratory, you must retain all records pertaining to each employee urine specimen for a minimum of two years. (b) As a laboratory, you must also keep for two years employer-specific data required in §40.111. (c) Within the two-year period, the MRO, the employee, the employer, or a DOT agency may request in writing that you retain the records for an additional period of time (e.g., for the purpose of preserving evidence for litigation or a safety investigation). If you receive such a request, you must comply with it. If you do not receive such a request, you may discard the records at the end of the two-year period.
Title 49: Transportation
PART 40—PROCEDURES FOR TRANSPORTATION WORKPLACE DRUG AND ALCOHOL TESTING PROGRAMS
Subpart F—Drug Testing Laboratories
§ 40.109 What documentation must the laboratory keep, and for how long?
