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w�7 <br />Tank Buoyancy Worksheet m CONT OLAGENCY POLLUTION <br />1. Tank Specifications Project ID: <br />v 04.01.2021 <br />A. Tank Manufacturer: Precast Systems Inc <br />Tank Model: Darwin 1250 <br />B. Outside Tank Dimensions and Specifications: <br />Tank Use: Dosing <br />Length:128 in Width:86 in Height: F47 in <br />Diameter:in <br />Length: 10.7 ft Width: =ft Height: =ft <br />Radius of Tank: in <br />2. Outside Volume of Tank <br />Rectangular Tank <br />Circular Tank <br />A. Area of Tank = Length (ft) X Width (ft) <br />A. <br />Area of Tank = nr2 (3.14 X (Radius of Tank)2) <br />10.7 ft X 7.2 ft = 76.4 ft2 <br />3.14 X ft) 2 = ft <br />B. Volume of Tank = Area of Tank (2.A) X Height (ft) <br />B. <br />Volume of Tank = Area of Tank X Height (ft) <br />76.4 ft X [:::= ft = 299.4 ft3 <br />ft2 X [=ft = ft3 <br />3. Force of Tank Weight (FrY) <br />Weight of Tank (provided by manufacturer) <br />11142 <br />lbs/ft3 <br />4. Force of Soil Weight Over Tank (Fsw) <br />A. Depth of Cover Over Tank: 30 in 2.5 ft <br />Weight of Soil <br />Soil Type (lbs/ft') <br />B. Weight of Soil Per Cubic Foot: 90 lbs/ft' <br />Sandy 120 <br />C. Volume of Soil Over Tank = Depth of Cover (ft) X Area of Tank (ft2) <br />Loamy 100 <br />2.5 ft X 1 76.4 ft = 1 191.1 ft3 <br />Clay 90 <br />D. Weight of Soil Over Tank = Volume of Soil Over Tank X Weight of Soil Per Cubic Foot <br />191.1 ft, X F907Lbs/ft' 17,200.0 lbs Note: Assumes saturation does not get over the lid of the tank <br />5.Buoyant Force (FB) <br />Buoyant Force (FB) = Outside Volume of Tank X Weight of Water Per Cubic Foot (62.4 Lbs/ft) X 1.2 (Safety Fctr) <br />299 X 62.4 lbs/ft' X 1.2 = 22,419.6 j lbs <br />F°-4- JFQ <br />6. Evaluation of Net Forces <br />A. Downward Force = Force of Tank Weight (Fm) + Force of Soil Weight of Soil <br />(F5W) <br />111}2 lbs + 17200 lbs = 28,342.0 lbs <br />+= F. > 1.2 x Fe <br />Fw=vWxenmah- <br />B. Net Difference = Downward Force - Buoyant Force Including Safety Factor <br />F�, = weight of tank <br />Fa=Tolaltank voiumex62.41bAf) <br />(8.351W al) <br />28342 lbs - 2242D lbs = 5,922.4 lbs <br />If the Net Difference is negative, countermeasures will need to be taken to <br />prevent the tank from floating out of the ground, <br />Comments/Solution: <br />