Code of Maine Rules › 02 - DEPARTMENT OF PROFESSIONAL AND FINANCIAL REGULATION › 658 - MAINE FUEL BOARD › Chapter 109 - INSTALLATION OF OIL BURNING EQUIPMENT › Section 658-109-11 - Outside Oil Supply Tanks

Current through 2024-29, July 17, 2024
1. Oil supply tanks
				shall not be installed on wood or other combustible surfaces or
				supports.
3. A horizontal oil
				supply tank shall 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), 4 x 8 x 16 inch reinforced concrete blocks or a one (1) piece reinforced concrete pad not
				smaller than the tank dimensions. The four (4) blocks or the pad shall 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. See Figure 12(a). There must be a minimum of 4" of clearance under
				the tank from any surface. See Figure 12(a)).
4. An upright or vertical tank shall be
				mounted on steel pipe legs not exceeding twelve (12) inches in height, with
				floor flanges at the base of the steel leg, and 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 shall be of one (1) piece
				construction. The pad shall rest on a bed of compacted, well draining gravel (6
				inches minimum), crushed stone (6 inches minimum), or some other subgrade
				approved by the Board. There must be a minimum of 4 inches of clearance under
				the tank from any surface. See Figure 12(b).
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5. When installing a vertical fuel oil tank
				in a listed secondary containment system, the four (4) inch clearance
				requirement from the bottom of the tank to any surface may be reduced to a
				minimum of one (1) inch.
6. The leg
				brackets welded on the tank shall not be considered a leg and may not be used
				to rest on the side of the reinforced concrete pad or reinforced concrete
				blocks.
7. When a reinforced
				concrete pad is fabricated on-site, the legs of the supply tanks shall not be
				embedded as part of the pad.
8. In
				all installations, the pipe flanges must be in direct contact with a reinforced
				concrete pad or reinforced concrete blocks.
9. Tanks must be disposed of in accordance
				with the Department of Environmental Protections Rules. Used, underground, oil
				storage tanks are prohibited from use for aboveground supply of oil except
				where a Maine registered engineer certifies that the tank meets the
				requirements of UL 142 and NFPA 30.
10. 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.
11. All outside
				supply tanks shall be held to the same standards as newly installed
				tanks.
12. For a single-tank
				installation, the fuel supply line cannot extend more than twelve (12) inches
				beyond the face of the tank.