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Miscellaneous displacement calculations. The vertical tank displacement is as follows: <br /> Vertical USTs <br /> F1 x (5 feet)x 2 feet x 7.48 galt t3 = 1,174 gallons/tank x 6 ASTs = 7,046 gallons <br /> F1 x (5.5 feet)2 x 2 feet x 7.48 galttt3 = 1,421 gallonsttank x 2 ASTs = 2,842 gallons <br /> Total - 9,888 gallons <br /> Miscellaneous Displacement: area of miscellaneous pipes, horizontal tank footings, horizontal <br /> tank bottoms below the containment wall and pumps approximated at 15% of total area of <br /> containment. <br /> Miscellaneous displacement = 15% x Inner wall length x Inner wall width x containment height x <br /> 7.48 galttt3 <br /> = 0.1 x 89 ft x 39 ft x 2 ft x 7.48 gal//ft3 <br /> = 7,789 gallons <br /> Total STFA containment= containment capacity-displacement capacity <br /> = 51,926 gallons -9,888 gallons- 7,789 gallons <br /> = 34,249 gallons > 26,000 gallons (100° largest tank volume + 25-year/24-hour rainfall) <br /> The tank farm capacity is sufficient to contain a spill of 100° of the largest aboveground tank plus <br /> the 25-year/24-hour precipitation rate (2.75 inches)for Stockton. California. <br /> Fuel AST Containment Capacity- Largest Tank Volume: 12.000 gallons <br /> The fuel AST (AST 12) is constructed of steel and measures 30 ft long by 12 ftwide by 5.1 ft high. <br /> The AST is on footings with approximately 2.4 feet of the tank below the top of the containment <br /> wall. The AST dimensions are 9' feet in diameter by 24 feet long. The containment volume is the <br /> containment volume minus the volume of the portion of the AST that is below the containment <br /> wall. <br /> AST 12 enclosure containment volume = wall length x wall width x wall height X Civ <br /> = 30 ft x 12 ft x 5.1 ft x 7.48 galttt3 <br /> = 13,733 gallons <br /> The area of the portion of the AST that is below the containment wall can be calculated by the <br /> following equation:: <br /> area = r2cos-tl r-h -(r-h) 42rh-h2 <br /> r <br /> Where r is the radius (4.5 feet) and h is the height of the cylinder that is below the containment <br /> wall (2.4 feet). <br /> Area = 13.6 ft2 <br /> The volume of the AST that is under the containment wall is the area x length x Civ . <br />