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FUEL TANK BUOYANCY JOB NO. : 21M085 S- kw1 -20k GALLON TANK PATE : 4/26/2023 st associates �' architecture engineering 5urveying PAGE : 4 2237 5-enic Grhe,modesto,ca 95555 p:209.52.8323 0X-529-7804 SLAB WIDTHTANK PROPERTIES: q• Empty Volume : 20,000 GallonsL i� �Zi I � � •,ii-"tui it 1_ Misc. Equip.: 1,800 Gallons - ICLI Empty Weight : 11,300 lbs -H T I cap SUMP Length : 37.73 ft _ IS. Q Diameter: 10.00 ft _ ;_ I 1 -! ~ Bury Depth: 4.33 ft Q Sump Diameter : 4.00 ft p Sump Quantity : 2I - - - DEADMAN PROPERTIES: - t- I TANK Length : 36.00 ft ~ Width : 18.00 in 11 _ i Depth : 8.75 in a BACKFILL PROPERTIES: BUOYANT FORCES: Z Material: PEA GRAVEL Tank Displaced Water Vol. = 2,674 ft3 _ Dry Unit Wt.: 100 pcf Misc. Equip. Displaced Water Vol. = 241 ft3 Saturated Unit Wt.: 120 pcf Sump Displaced Water Vol. = 109 ft3 Submerged Unit Wt.: 57.6 pcf Total Displaced Water Vol. = 3,023 ft3 Friction Angle, 5 deg. x 62.4 Ib/ft3 Slab Thickness: 8 in TOTAL BUOYANT FORCE = 188,652 lbs RESISTING FORCES: Concrete Slab Wt. = depth x length x width x 150 pcf = 52,949 lbs Tank Wt. = (empty weight_see above) = 11,300 lbs Tank Backfill Wt. = depth x tank diameter x tank length x submerged unit wt. = 94,102 lbs Deadman Wt. = depth x length x width x 123 pcf x 2 deadmen = 10,789 lbs Deadman Backfill Wt. = deadman width x length x backfill depth x 2 deadmen = 126,398 lbs Sumps Wt. = -(sump displaced water volume x backfill weight) _ -6,268 lbs TOTAL RESISTING FORCE = 289,269 lbs Total Resisting Force 289,269 lbs Safety Factor = _ = 1.53 >1.25-OK Total Buoyant Force 188,652 lbs DEADMAN: 18.00 in wide x 8.75 in deep x 36.0 ft long BACKFILL MATERIAL: PEA GRAVEL SLAB: 13.0 ft wide x 8.00 in thick x 37.7 ft long BACKFILL DEPTH: 4.33 ft