@Tim Delaney That's exactly what I'm wondering. I've reached out to a wholesaler to get an MPSI (convenience/retail/gas analytics) on the address.
As far as successful, I do have some gas station experience, though the site only had a traffic of under 10,000 vehicles a day but fuel volumes of 925k gallons annually (from about 600k when taking it over). This site is 40k+ vehicle traffic. 70k gallons a month (840k a year) seems on the high end compared to lots I've seen for sale, but given the traffic difference is lower than I'd say I'm probably used to. The store is where I think the difference can be made.
You're right about the equipment. Tanks were installed in '15 (there was contamination in 2014 and it was fixed by removing/replacing tanks, and State website shows it was cleaned up). There's no dispensers, but the rest of the equipment most definitely needs a full check. And of course pressure test on all lines/tanks.
You bring up a good point on electric vehicles. The thought there is twofold. There's lots of parking that I don't think is necessary, nor are there many electric car charging locations nearby. The nearest Tesla supercharger is 10+miles away as well. So if it's possible to get them in for 4-6 spots, and then another 2-3 spots for fast charging for normal vehicles, it could be a bit of added revenue (from the fast charging fees plus ideally Tesla customers purchasing goods in the store).