It stores itself in the Exact same way as smoked cannabis. Therefore, it is exactly as smoked cannabis, totally depends on your metabolism. An eighth baked into a brownie is the same as smoking that eighth, same amount of thc and bud. If your not feeling the effects of the second hand smoke and your not a regular toker, your not getting any thc. The military as well as any other institution does not take second hand smoke as an excuse because they have proved you cannot get high (recieve thc) from it. Like I say, unless you are in a Very confined place it will not be in your system.