*A Bit of an update*
I had only eyeballed the size of this tank as being a 20 gallon long. Well, once I took a measuring tape to it the dimensions came back 36X13X14 (not exact due to its rimless condition). Correct me if I'm mistaken, but that's closer to a 30 gallon tank. Not bad!
In addition, I noticed a sticker underneath the tank from "classcages.com," so as it turns out this was a relatively new tank before someone just dumped it on the street.