We have a basement garage in our house which has probably not seen a car since the 80s. It still smells of gasoline.

driverdan 3 days ago | parent | next [-]

Concrete absorbs petroleum spills. You may need to identify areas that are stained and do a thorough cleaning to try to extract as much as possible.

	▲	mitjam 3 days ago \| parent [-]
		Yeah, also: The walls are covered with vapor-permeable lime plaster. the idea is to let a contractor specialized in this knock it all off. I have heard that there‘s probably lead in there from leaded gasoline, could be bad for health.

sidewndr46 3 days ago | parent | prev [-]

How do you have a basement garage? I've seen some weird arrangements, but did the driveway have some massive slope or something?