
Drug testing in American workplaces became more common after 1986 when federal employees become officially forbidden from using illegal drugs. However, as states began changing laws to allow consumption of marijuana for medical use or even recreational use, this federal law that encourages drug testing has become an issue. Particularly for companies that have federal contracts and are based in a state where recreational use of marijuana is completely legal. Over this time, propagation techniques and cultivation has meant that concentration of THC levels has found to have been steadily increasing. This has become a problem for people who are in proximity to others who are smoking the drug, even if they are not imbibing themselves, as workplace drug testing that uses a hair strand drug test may still pick up traces of THC long after the exposure period, creating a false positive result purely from exposure. Questions arise about how long after exposure can trace of the drug still be detected in your system and do different tests produce different results.















