you will not be done with lsd in your system. From what i've been told, it really only has a detectable period of around 6 hours AFTER ingestion, even then they have to drag you down to do some super expensive blood work to test for something that most likely won't be found. There is another test that can be performed, which has had some US marines caught, but this sort of test and technology is way too expensive and definetly not worth while. Seriously, when was the last time you heard of a car crash as a result of lsd? If i were to, lsd and mushrooms would be the only drugs i'd drive on. Would be like a video game, but don't do it