Here is a basic explanation of the half-life of LSD and how it is expelled from the body. It's not the most in-depth or recent but it's got good references.
I commend you in providing proof from what looks like a credible source, but I'm not impressed in how lazy you were to keep from getting more than one source... Actually, no, as a lazy f*ck myself, your laziness impresses me too. XDDDD
In conducting my own research, I've actually found a number of sources
disproving my own argument. The myth I've resurrected was the result of taking a sociology class in college, whose textbook helped this myth prevail even more (a book as recent as two years ago, no less). The closest to an argument I can make is the idea of an illness known as HPPD, or
Hallucinogen Persisting Perception Disorder, which is a hazy illness to begin with that may or may not be caused by hallucinogens, and may or may not even exist. But that's not my argument to make.
I falter my argument to you, my good sir.