There is a tolerance in the test. I have to deal with them many times, in my state the tolerance is 0.25 , i can smoke one joint every two weeks after a month pause ( nearly the time to expell al the residue in my body with a fast metabolism, maybe it can take a little bit longer) and i was always a lot under the tolerance. You can also stay in a room with others smoker for all your day and the levels will not increase. Touching cannabis plant will not cause any fail because you will not absorb any becarboxyllated cannabinoids ( the test search them)
You can be sure that you will pass it, to calm your mind you can wear gloves but they will not help in other way 😉✌️🏽
Sorry for my english , hope to help you