we used to have a gas station in my town, that had leaky tanks, not only did they get a lot of water.. it was on the side of a creek/ small river, which is the headwaters to 1 of the Resivores running water to NYC.. the actual dam wall is only a few miles from the station too.. people started to complain, and loss of buisnuess caused them to switch suppliers 4 times in 2 years, and ended up just being an independent buying really cheap gas.. lasted a few months, they pulled the tanks just a few months ago