A proper foundation does more than just hold a house above ground. It also keeps out moisture, insulates against the cold, and resists movement of the earth around it. Oh, and one more thing: It should last forever. No wonder builders like This Old House general contractor Tom Silva take foundations seriously. Without a good one, he says, you're sunk.. For Tom, good means steel-reinforced foundation walls and footings made of poured concrete.
As a rough guide it takes about 5.5 half lives for a drug to be out of your system. For adderall then it would take just over 2 days for a dose to be out of your system. (5.5 x 10 = 55 hours - which is just over 2 days) You should allow for longer (7 days) if you have taken adderall frequently and at high doses.
When working out how long Adderall will stay in your system, we need to consider it from the viewpoint of drug tests. Even if some Adderall is still in your system, you can still pass a drug test. This is because drug tests have a cut-off point to minimize the number of false positives.