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A WARNING 1.3.4.10.Call your sales representative prior to tank purchase In a nontraffic installation,ensure that the area above the tank is for additional information if the burial depth is to be greater than not subjected to traffic or other types of loads,which could cause 7 feet[2.1 meters]. damage to the tank,and could result in death or serious injury. 1.3.4.11.If you are in the process of installing a tank and need 1.3.4.5.Fuel tanks must have a cover depth as shown to consider a deeper burial than the one given for the tank that in Table 1-1. was ordered,contact technical support(eng.support@zcl.com) 1.3.4.6.For fuel tanks,as a minimum,tank owner must comply with to discuss available options. relevant fire codes—in the US,National Fire Protection Association(NFPA) 1.3.4.12.If a surface pad is used,surface pads must extend 30 and 31;and in Canada,the National Fire Code of Canada and/or ap- a minimum of 12 inches[30 cm]beyond the tank in all directions. plicable local codes for fuel tanks.See Table 1-1 for those requirements. 1.3.4.13.If there is an unattached riser,it must not transmit load from the concrete slab to the tank.A minimum space of 6 inches[15 cm]is required between the bottom of the riser and the top of the tank. Depth of Cover Minimum Requirements for Fuel Tanks 1.3.4.14.Traffic loads from the top slab must not be transmitted to a containment sump ora riser.A minimum No Traffic Options(US Installations) space of 3 inches[7.6 cm]is required between the riser •24"[60 cm]backfill or sump and the slab. •12"[30 cm]backfill+4"[10 cm]reinforced concrete 1.3.5.TANK SPACING •12"[30 cm]backfill+6"[15 cm]asphalt No Traffic Options(Canadian installations) NOTE:In certain excavations with unstable soil, where shoring is permanently in place,the excavation •24"[60 cm]backfill might be classified as a stable-soil excavation.The tank Traffic Options(US Installations) owner should have a qualified engineer certify that the •36"[91 cm]backfill excavation would remain stable for the expected life •18"[46 cm]backfill+6"[15 cm]reinforced concrete of the tank installation. •18"[46 cm]backfill+8"[20 cm]asphalt 1.3.5.1.GENERAL Traffic Options(Canadian installations) 1.3.5.1.1.The following are minimum spacings and must be •39"[100 cm]backfill increased as needed to accommodate deadmen or anchor slabs. •18"[46 cm]backfill+6"[15 cm]reinforced concrete 1.3.5.1.2.Always provide sufficient clearance to allow •18"[46 cm]backfill+8"[20 cm]unreinforced concrete the dead men to be set outside of the tank"shadow" NOTE:These are NFPA 30 and 31 and See Figure 1.2. National Fire Code of Canada requirements. Figure 1-2 1.3.4.7.Tanks other than fuel tanks must have a cover depth as shown in Table 1-2. Tank Shadow Depth of Cover Minimum Requirements for Tanks Other Than Fuel No Traffic Options(All Installations) •12"[30 cm]backfill Traffic Options(All installations) •36"[91 cm]backfill •18"[46 cm]backfill+6"[15 cm]reinforced concrete •18"[46 cm]backfill+8"[2 0 cm]asphalt III o°o' �' o°00000°o°oo000000000000000000000000000000 o°o 0 0 0 0 0 0 00000°000... 000 DrJ;0000000000000 .p..0 O 000000000000 1.3.4.8.The maximum burial depth for standard tanks is7feet VIII=_VIII _ VIIIIIIII — VIII=VIII=VIII =VIII [2.1 meters]of cover over the top of the tank.However,tanks can be designed fora deeper burial. —IIIII =-IIIII — IIIII— IIIII—IIIII-- IIIII-- IIIII 1.3.4.9.You must obtain priorwritten authorization from us to deviate �—►Width 2 x Width 4 from a standard tank's maximum burial depth. 07