Tragedy avoided! Todays job was a recent conversion to gas. This tank was one of two in the basement of a home in Villanova. At some point, one of the tanks developed the hole that you see here (black spot near the center of the photo). This hole was on the underside of the tank. Instead of replacing the tank, a magnet was put over the hole to hold back the oil. While this is a common practice for extremely temporary leak issues (hours or days), this particular fix was left for over two years. The home owner was unaware of the potential hazard.