Here is a copy of a letter dated April 26, 2017, in which the Commanding Officer, Navy and Marine Corps Public Health Center, reported three false positive results for methamphetamine at the Navy Drug Screening Laboratory, Great Lakes (NDSL-GL):
On 13 April 2017. NDSL-GL discovered a specimen was incorrectly reported positive for methamphetamine on 11 April 2017. During confirmatory testing it was determined that the false positive specimen was co-processed with a batch rejected due to cross-contamination generated from a specimen that contained a very high methamphetamine concentration. As a result. a retest was conducted that revealed no evidence of methamphetamine in the service member’s urine. The positive report was withdrawn and the submitting command notified of the error.
Sadly, this wasn’t an isolated problem. An investigation revealed:
two additional contaminated specimens were identified: one was not reported as positive due to a subsequent negative intermediate screening result, and the second was reported on 7 June 2016 for an Army Reserve member. The reported result was discovered on 22 April 2017. The positive report was withdrawn and the submitting command and the Army Drug Testing Program Office were notified of the false positive report. The Service Member had not yet been separated.