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46 WISCONSIN ADMINISTRATIVE CODE Ind 8 Ind 8.195 Labeled tanks. Aboveground tanks for Class I liquids, other than at refineries, or marine or pipeline terminals shall have painted conspicuously thereon in letters at least 5 inches high,the word- . ing"FLAMMABLE—KEEP FIRE AWAY". History:Cr.Register,March, 1982,No.315,eff.4-1-82. Ind 8.20 Tanks not in use. (1) ABANDONED OR OUT OF SERVICE TANKS. Aboveground tanks temporarily out of service or abandoned shall be equipped with valves and vents in accordance with s. Ind 8.19 or made gas free and have pipe plugs installed in all tank openings. Written no- tice to the local fire authority shall be given when tanks are rendered temporarily out of service. (2) TANK REMOVAL.If tanks are not put back into use after a 12 month period, tanks shall be removed from the location. History:Cr.Register,March, 1982,No.315,eff.4-1-82. Ind 8.205 [2-3] Installation of underground tanks. (1) GENERAL. The use of rivited or caulked tank, for underground storage shall be prohibited. (2) 12-3.1] LOCATION.Excavation i':1r underground storage tanks shall be made with due care to avoid una.rmining off undations of existing structures. Underground tanks or t.+,cks under buildings shall be so lo- cated with respect to existing building foundati us and supports that the loads carried by the latter cannot be transmi:ted to the tank. The distance from any part of a tank -;wing Class I. Class II or Class III liquid- to the nearest wall of any ha -ment or pit hall be not less than 1 foot,and to any property line that can be built up( n,not less than 3 feet. (3) [2-3.2] BURIAL DEPTH AND COVER. (a) [2-3.2.1] Steel underground tanks shall be set on firm foundations and surrounded with at least 6 inches of clean sand or pea gravel w1.11-tamped in place.The tank shall be placed in the hole with care. sine_• dropping or rolling the tank into the hole can break a weld.puncture:r damage the tank,or scrape off the protective coating of coated tanks. (b) [2-3.2.2] Steel underground tanks shall be covered with a mini- mum of 2 feet of earth,or shall be covered with n ,t less than one foot of earth, on top of which shall be placed a slab of rc inforced concrete not less than 4 inches thick. When they:ire,or are likely to be,subjected to traffic, they shall be protected against damage Crom vehicles passing over them by at least 3 feet of earth cover,or 18 :aches of well-tamped earth plus either 6 inches of reinfor<:d concrete cr 8 inches of asphaltic concrete.When asphaltic or reinforced concr, ;e,,tying is used as part of the protection, it shall extend at least 1 foot ht,:izontally beyond the outline of the tank in all directions. (c) [2-3.2.3] Nonmetallic underground tanks shall be installed in ac- cordance with the manufacturer's instructions. The minimum depth of cover shall be as specified in par. (b) for steel tanks. (d) [2-3.2.4] For tanks built in accordance with s. Ind 8.18 (3) (a), the burial depth shall hr such that the static head imposed at the bottom of the tank will not exceed 10 prig if the fill or nt pipe is filled with liquid. If the depth of'c•over is great:r than the tank diameter,the tank manufacturer shall he consulted t , determine if reinforcement is re- quired. Regh.ter. \!.r,h. 19,2,No '17.