Section 23.142. Fuel oil storage tanks

(a) The main supply tank of oil-burning boilers or heating equipment shall be located outside of the building. If it is located in the building, it shall be buried at least 2 feet underground or located within a fireproof enclosure of at least 12 inches in thickness, six of which shall be of sand solidly tamped and the other six of concrete. The sand shall be between the tank and the enclosure. The fuel tank shall be located at least 15 feet away from the heating plant, 2 feet from all foundation footings, and shall be filled and vented outside the building.

(b) The requirements of subsection (a) apply if the storage tanks for fuel oil, when not more than two tanks of 275 gallons each are used, need not be located outside the building or in a fireproof enclosure when automatic stop valves are provided so that the oil does not flow except when the blower is running and the oil is in combustion, and the tanks are located not less than 7 feet from the furnace. Fuel oil supply tanks shall not be installed in or under the drycleaning room.