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UNDEKOROUND TANK INSTALLATION Page 1 <br /> Design for Anchorage Against Buoyancy Dern Uuide <br /> TANK DATA INSTALLATION DATA <br /> 0 Tank Model No. © Burial Depth, ft . S <br /> Nominal Capacity �Oppp gallons Design Groundwater Depth, ft Gam <br /> (J Primary Tank Ins. Dia. circ in. Slab Thickness, inches c <br /> Outside Diameter � � in. t t Slab Width, ft :o di greater than tank <br /> 4 <br /> / dimensions+z,or the <br /> Overall Length .�� ft. JOACL&4.MOI, W*ut ® Slab Length, ft 2b•-�� tank spacing,wtyct»ver <br /> is smaller. <br /> 0 No. of Sumps _ <br /> Note: This information is to be furnished by thq)pnk owner for the purposes <br /> Sump Diameter L/ in. of determining tank anchorage requirements.14 voldity of this design is <br /> directly dependent on the accuracy of this information. The tank owner is <br /> responsible for the design for installation conditions other than 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 ; r <br /> Required. Which case applies will depend on the : <br /> installation conditions being designed for. This design of <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. F 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. Once <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 Ht, ft Wet Ht, ft <br /> 1 Concrete Slab 3 4 <br /> 67 Zone 3 <br /> 5 6 <br /> 2 Backfill above tank top S .�3 <br /> 3 Backfill between & i <br /> bottom and top of tank - ` <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) 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 2�7 Z-0 lbs/ft of tank length <br /> ®i Weight of tank heads(from note on buoyancy chart) /S" lbs, total for both <br />