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7 5 TANK SPACING <br /> Depth of Cover <br /> Minimum Requirements for Tanks 7.5.1. GENERAL <br /> Other than Petroleum Tanks 7.5.1.1.The following are minimum spacings and must be in- <br /> No Traffic creased as needed to accommodate deadmen or anchor <br /> slabs.See SECTION 8. _ <br /> • 12" backfill <br /> 7.5.1.2.Always provide sufficient clearance to allow the dead- <br /> Traffic Options men to be set outside of the tank"shadow."See FIGURE 7-2. <br /> • 36"backfill _ <br /> • 18"backfill+6"reinforcedconcrete III= Tank Shadow <br /> • 18" backfill+8"asphalt _ <br /> NOTE:The maximum burial depth for standard tanks is 7 —11111 <br /> feet of cover over the top of the tank. <br /> TABLE 7-1 1111=11 <br /> =1111 <br /> 7.4.7.Tank owner must follow NFPA 30 and 31, as a minimum, 11111=I <br /> for petroleum tanks. See TABLE 7-2 for those requirements. <br /> 1111=1111 ;; . <br /> Depth of Cover <br /> Minimum Requirements for Petroleum Tanks - —No Traffic Options 2 x Width <br /> • 24" backfill Width(See TABLE 8-4) <br /> • 12" backfill+4" reinforced concrete <br /> FIGURE 7-2 _ <br /> • 12"backfill+6"asphalt 7,5.2. SPACING IN STABLE IN SITU (NATIVE) <br /> Traffic Options SOIL CONDITIONS <br /> • 36" backfill 7.5.2.1.The minimum spacing between the sidewall or endcap _ <br /> • 18"backfill+6"reinforced concrete of the tank and the side of the excavation must be 18 inches. <br /> • 18"backfill+8"asphalt See FIGURE 7-3. <br /> NOTE:These are NFPA 30 and 31 requirements. NOTE:All measurements from the tank sidewalls are to be <br /> taken from the outside diameter of the tank ribs. <br /> TABLE 7-2 _ <br /> 7.4.8.The maximum burial depth for standard tanks is 7 feet IIII MH <br /> II— <br /> of cover over the top of the tank.However,tanks can be de- I ITI—I I <br /> signed for a deeper burial. =T-1Ez Ti <br /> 7.4.8.1.Call your Xerxes representative for a special quotation j 1111 <br /> prior to tank purchase if the burial depth is to be greater than =1tll— <br /> 7 feet. — <br /> 7.4.8.2.If you are installing a tank and need to consider a TI <br /> deeper burial than that given for the tank that was ordered,con- III=IIII <br /> tact your Xerxes representative to discuss available options. 11 1 <br /> -11=11111 III—III=11111=1111.1 - 11-11111= = 1 <br /> 7.4.8.3. Prior written authorization from Xerxes is required to — I <br />