When I lived in Calif we did a demo on a gas station that was only 10 years old. The city rezoned the property and the property was worth more when combined with the adjacent vacant lot. The thing to look for is where the air line hooks up. and be careful not to break any fittings, The City inspector was there to check for oil leaks and soil contamination. There were 2 lifts, My neighbor put his outside next to his garage and a new walk thru door. He filled his with peanut oil and kept the receipt so he wouldn't have any problems with soil contamination. a lot of tree huggers watch what you are doing, working on a car in the backyard, spilling oil in the dirt etc, etc. mosr cities in Calif would require a secondary containment in case of a leak. a concrete pit that can be inspected for leaks that the hoist is mounted in.