R 408.41865 Outside storage.

Rule 1865. (1) Containers of flammable liquids with not more than 60 gallons in each container shall not be stored in excess of 1,100 gallons in any outside storage area. (2) Portable tanks stored outside shall not be closer than 20 feet from any building. Two or more portable tanks, grouped together, having a combined capacity in excess of 2,200 gallons, shall be separated by a 5-foot clear area. Individual portable tanks exceeding 1,100 gallons shall be separated by a 5-foot clear area. Piles or groups of containers shall be separated by a 5-foot clearance. (3) Within 200 feet of each portable tank, there shall be a 12-foot wide access way to permit approach of fire control apparatus. (4) A flammable liquid in an outdoor storage area shall be stored not less than 20 feet from a building. (5) Within 200 feet of each pile or group of flammable containers, a 12-foot wide access way shall be maintained to permit the approach of fire control equipment. (6) An outside storage area for flammable liquids shall be graded in a manner to divert a possible spill away from a building or other hazard, or shall be surrounded by a curb or earth dike not less than 12 inches high. When a curb or dike is used, provisions shall be made to drain off accumulations of water or a spill of a flammable liquid in such a manner that the spill cannot create a hazard for an employee. The drains shall terminate in a location that will not create another hazard. (7) An outside storage area for flammable liquid shall be kept free of weeds, papers, debris, and other combustibles not necessary to the storage. (8) An above ground tank or loading operation shall not be installed closer than 25 feet plus 1 inch per 1,000 volts, measured horizontally, from the center line of electric power lines, or under an electric power line, except that service entrance and service lines may be closer than 25 feet but not over the tanks or loading area. This prohibition shall not apply to a fuel oil tank with up to a 275-gallon individual capacity or a 550-gallon aggregate capacity that is used for heating purposes. (9) A flammable or combustible liquid outdoor storage area shall not occupy any area used as a means of egress. (10) Underground tanks shall not be abandoned.