Hi AllHoping someone can shed some light on this. A friend was tested at work for THC, the result was positive and he was declared unfit for work and has to return once a week to test, only once the person has tested negative will they be re-instated at work. This was a few weeks ago. Since then he has not smoking/ingesting at all.For the first 2 weeks, there was a decline in the concentration in the amount of THC picked up in the test indicating that he hasn't been consuming. So....resultsWeek 1 - 98Week 2 - 77All good so far.....then...Week 3 - 87. (Not sure what these numbers mean, this is just the results from the lab)Is it at all possible for there to be a spike in your THC level after abstaining completely. Thanks