The pipe that goes between the oil tank and the boiler (in my Aunts house) is leaking. Well, no oil is getting through to the boiler and oil is leaking from the pipe close to the tank. The plumber who has looked at it says that the copper pipe is encased in a plastic sheath beneath the concrete and the oil is leaking through the copper and flowing back between the copper and plastic and emerging from the pipe near the oil tank. Is this likely or possible? (I haven't actually seen it myself so i'm only relaying a secondhand account).
The tank is situated about 10 or 15 yards from the house in a secluded spot and ideally she doesn't want to have to move the tank adjacent to the house as it would be unsightly.
How difficult would it be to cut a groove in the concrete with some sort of grinder and relay it? How deep would it have to go as cutting through 2/3 feet of concrete sounds unrealistic?