How to pass drug tests

All cutoff levels are in nanograms/mL. 1.3.1 Passive smoke and positives: "Second hand marijuana smoke in a car. can cause you to fail the next day" (Nightbyrd). It is possible that. second hand [marijuana] smoke will raise someone to the 50 ng/mL level; however, *extreme* exposure is required. For instance, a closed car full ................
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