As of September 30, 2011, all residential oil supply and/or return that have contact with the earth, concrete, or a floor surface, must be upgraded. Unprotected oil lines are often buried and if a leak occurs and is undetected, it can be very costly to clean-up.
Oil lines installed on or after January 1, 1990 are most likely already in compliance. If your oil line has an oil safety valve installed at the outlet of the oil tank or has plastic sheathing on the outside of the line, no action should be necessary. Oil lines which run overhead, and are not in contact with the earth, concrete and or a floor surface, are excluded from the upgrade requirement. Contact your oil technician for more details or visit the state web site at www.mass.gov/dep/cleanup/laws/hhsl.htm