Hair testing is one of the most accurate and effective methods of finding drug abusers in the workplace. With a much longer window of detection than urinalysis, and nearly impossible to substitute or adulterate, hair testing has quickly become a necessity for employers to incorporate into their drug and alcohol testing programs, particularly for pre-employment.
Compared to the more traditional forms drug testing, such as urinalysis, with a 2-3 day window of detection, a hair sample can detect a much longer period of drug use. Each ½ inch of head hair provides a 30 day history of detection. The standard test length (1.5 inches) allows for a 90 day window. If no head hair is available, body hair from the chest, under arms and legs may be used.
By using a small sample cut at the scalp, the laboratory test measures the drug molecules embedded inside the hair shaft, eliminating external contamination as a source of a positive test result. Any sample screened as potentially positive is confirmed using state of the art technology. The collection process is quick and safe (no handling of body fluids), and the test results are legally defensible and admissible in court cases.
Hair follicle testing detects the following drugs of abuse: Amphetamine/Methamphetamine/Ecstasy, Cocaine/Cocaine metabolites, Opiates (Codeine, Morphine, Heroin metabolite, Hydrocodone, Hydromorphone, and Oxycodone), Phencyclidine (PCP) and Marijuana.
Recent studies have revealed hair testing is the most effective method for pre-employment “safety sensitive” positions
♦ DOT Transportation: Over 2 times higher positive rate combined with significantly lower post accident and random positive rates
♦ Manufacturing: Over 5 times higher positive rate
♦ Drilling / Energy: Over 6 times higher positive rate
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