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UNDErx%uROUND TANK INSTALLATION Page 1 <br /> Design for Anchorage Against Buoyancy Dein Guide <br /> TANK DATA INSTALLATION DATA <br /> 0 Tank Model No. S 2'0 ® Burial Depth, ft <br /> 0z Nominal Capacity -2,0,C4!� gallons Design Groundwater Depth, ft !, r <br /> Primary Tank Ins. Diain. Slab Thickness, inches / <br /> 0i Outside Diameter l?sf in. t t Slab Width, ft =thonk/Q heOverall Length 5CD,�'' ft. lead.e,a.r,�onttarweNJ ® Slab Length, ft z �' »ver <br /> C No. of Sumps <br /> Note: This information is to be furnished by theonk owner for the puposes <br /> 0 Sump Diameter y Z in. of determirting tank anchorage requirements.111s voidity of this design is <br /> drectly dependent on the accuracy of this informafion. The tank owner is <br /> responsible for the design for installation conditions other thou stated herein. <br /> The installation of underground fuel storage tanks can be <br /> classified into one of two conditions: either Case 1, No <br /> Anchorage Required, or Case 2, Additional Anchorage <br /> Required. Which case applies will depend on the i" <br /> installation conditions being 9 9 designed for. This design of <br /> <.: <br /> the tank installation applies to the tank in the installed <br /> condition only. The tank may require external holddown to <br /> resist buoyancy during installation or during repairs or <br /> exhumation of the tank. The tank installer is responsible for <br /> conditions encountered during installation. Extreme caution <br /> must be exercised in all tank handling operations. CASE 1 CASE 2 <br /> STEP 1 -Determine the Heights of Zones 1-3 Zone 1 <br /> On the diagram at the right draw a line indicating the :. <br /> relative elevation of the Design Groundwater Depth. Cance <br /> the Design groundwater Depth has been established on Zone 2 <br /> the diagram, fill in the values of wet and dry heights for <br /> each zone in the table below. All heights must be <br /> expressed in feet. <br /> Zone No. Description Dry hit., ft Wet Ht, ft <br /> 1 Concrete Slab 7 <br /> 5 6 <br /> 2 Backfill above tank top <br /> 3 Backfill between _ e <br /> [bottom and top of tank <br /> LC <br /> STEP 2 -Determine the Net Buoyancy of Tank In Zone 3 <br /> Choose the appropriate chart to suit the diameter of the tank based on Primary Buoyancy <br /> the table at the right. From the appropriate chart determine the net Tank Dia Chart# <br /> buoyancy for Zone 3 and the weight of the tank heads. To find the Net 48 1 <br /> Buoyancy, enter the chart at the Design Groundwater Depth on the 64 2 <br /> horizontal axis, move vertically until intersecting the curve representing Burial Depth (8) 96 3 <br /> he design Burial Depth , move horizontally to the left to read the Net Design Groundwater Depth, (9) Gs v 128 4 <br /> Buoyancy, lbs per foot of tank length, off of the vertical axis. @Chart# _ 144 5 <br /> ® Net Buoyancy of Tank and Backfill above Tanktop lbs/ft of tank length <br /> ®t Weight of tank heads (from note on buoyancy chart) ZSSZ lbs, total for both <br />