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3:27 PM Buoyancy of Underground Tanks 8/14/97 <br />Fiberglass Straps with Deadman Anchors <br />"Bolt/ Typed Items are Input Values" <br />IModern Welding Co. of California <br />Underground Tank Description, USA Petroleum, Lodi, 12,000 gallon Jacketed Co <br />Tank Model: <br />GS13 <br />Tank Diameter O.D.(inches): <br />97 <br />Tank Length Inches): <br />384 <br />Tank Capacity Gallons): <br />12162 <br />Primary Shell Thickness(inches); <br />0.24 <br />— _ --- Tank Buoyanoy:1 <br />1 102,472 i <br />Sumps / Enclosures <br />�— <br />_ <br />Item 1: "Diameter (inches): <br />42 <br />_ <br />Item 1: "Height" (Inches):[ <br />6o <br />Item 2: "Diameter" (inches): <br />42 <br />1 <br />_ <br />Item 2: "Height" (Inches : <br />80 <br />Buoyancy contributed by enclosures: <br />6004 <br />Total buoyant Force of tank: <br />_ <br />108,476 <br />_ <br />Calculated Tank Weight: <br />9013 <br />Net Buoyancy required for Floatout: <br />_ <br />3 <br />Concrete Slab at Grade <br />_ Concrete wet ht / cubic foot: <br />130 <br />Surface Concrete Slab Thickness Inches): <br />6 <br />Weight of concrete Slab: <br />23595 <br />(Slab s1ze:24"stank diameter, 48"s tank length) <br />Burial and Water Table Depth <br />_ <br />— Net saturated soil weight to overcome buo ancy <br />57,6 <br />Saturated backfill we ht / # cubic foot. <br />120 <br />_ <br />Dry backfill weight / # cubic foot: <br />100 <br />Tank Burial Depth, Top of tank to grade (inches): <br />60 <br />Elevation of water table, " 0 inches" is flooded hole: <br />96 <br />OK <br />Weight of Backfill directly over tank: <br />_ <br />144191 <br />_ <br />I <br />Distance from Tank's side to Excavation Wall (Inches): <br />12 <br />i OK <br />Deadman Anchor width (Inches): <br />0 <br />OK <br />Deadman Anchor height (Inches):'_ <br />12 <br />_ Deadman anchor length (inches): <br />0 <br />_ <br />OK <br />Deadman Contdbutlon toward Overcoming Buoyancy: 1 <br />0 <br />Total Concrete, overburden, deadman contributions: I167786 <br />If =( ) then insufficient Buoyancy Results: <br />88,323 <br />_ SAFETY FACTOR: <br />1.2 <br />1.88 JACCEPTABLE <br />_ <br />Required <br />Fiberglass Hotddown Straps <br />Nat Rouy, n rbaction to be overcome by straps <br />0 <br />Straps not Rego. <br />Number of Holddown straps used on tank,1 <br />0 <br />Strap Size: 3/16" x 2" each <br />Maximum Allowable Load associated with strap: 1 <br />28500 <br />pounds / strap <br />Straps combined strength to overcoming buoyancy: <br />0 <br />pounds <br />SAFETY FACTOR: <br />1.50 <br />#DIV/01 #DIV/0! <br />Required <br />BUOYFIBR.XLS <br />Page 1 <br />