02-658-8 Me. Code R. § 10
Oil supply tanks shall not be installed on wood or other combustible surfaces or supports.
A horizontal oil supply tank must be mounted on steel pipe legs, not exceeding twelve (12) inches in height with floor flanges at the base of the steel legs and be supported by four 4" x 8" x 16" solid concrete blocks or a one piece reinforced concrete pad not smaller than the tank dimensions. The four (4) blocks or the pad must rest on a firm subgrade consisting of a bed of compacted, well-draining gravel (6-inch minimum), crushed stone (6-inch minimum), or some other subgrade approved by the Board. There must be a minimum of four (4) inches of clearance under the tank from any surface. See Figure 8-1.
An upright or vertical oil supply tank must be mounted on steel pipe legs not exceeding twelve (12) inches in height, with floor flanges at the base of the steel leg and must be supported by a reinforced concrete pad at least three (3) inches thick. The pad's width and length shall not be smaller than the tank dimensions. The pad must be of one-piece construction. The pad must rest on a bed of compacted, well-draining gravel (6-inch minimum), crushed stone (6-inch minimum), or some other subgrade approved by the Board. There must be a minimum of four (4) inches of clearance under the tank from any surface. See Figure 8-2.
The leg brackets welded on the tank are not considered a leg and may not be used to rest on the side of the reinforced concrete pad or solid concrete blocks.
When a reinforced concrete pad is fabricated on-site, the legs of the supply tanks shall not be embedded as part of the pad.
In all installations, the pipe flanges must be in direct contact with a reinforced concrete pad or solid concrete blocks. The use of shims is prohibited.
Tanks must be disposed of in accordance with the rules of the Maine Department of Environmental Protection.
In order to prevent oil spills, outside tanks and piping must be located such that they are not subject to falling snow or ice. To meet this requirement, the tank and outdoor piping must be installed with a protective cover over the tank valve, oil filter, and any piping which is either without structural support or not attached to the side of the building.
All existing outside supply tanks must be held to the same standards as newly installed tanks.
For a single-tank installation, the fuel supply line shall not extend more than twelve (12) inches beyond the face of the tank.
02-658 C.M.R. ch. 8, § 10