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Containment Calculations:Based on Dimensions Obtained on 1 June 2012 <br /> : <br /> Containment around Production Fluid Storage Tank C-30 <br /> Measured Heights within Containment(inch) <br /> 27 26.875 26.5 26.5 <br /> 28.375 28.5 26 25.75 <br /> Piping with 0.25 feet outside diameter 29.5 29 <br /> 60 ft <br /> Conduit with 0.11 feet outside diameter- X 2.25 feet length 30 30.375 <br /> X 22.92 feet length(inclduing riser) 28.875 29 <br /> a 28.8 28.375 <br /> N 27.8 26.675 <br /> Piping with 0.25 feet outside diame er Average Height availabel for 28.01 Inch <br /> X 17.25 feet length(inclduing riser) Piping with 0.29 feet outside diameter containment 2.33 feet <br /> X 3.5 feet length <br /> Heights measured for pedestal for tank(inches) <br /> Height available for oil <br /> retention=2.33 feet 20.5 <br /> Piping with 0.38 feet outside diameter Width of footing=1.5 feet 21.5 <br /> X 17.25 feet length(inclduing riser) Length of footing=12.17 feet 21 <br /> Capacity of production Fluid storage lank = 26,700 gallons Average Height= 21 inches <br /> 1.75 feet <br /> Volume not available for containment <br /> Pedestal for Conduit <br /> Base of 0.79 feet outside diameter X 0.17 feet Height <br /> Riser of 0.20 feet outside diameter X 2.08 Height <br /> Volume=(pi()X(0.79^2 X 0.17)+(0.20^2X2.08))X 7.48 = 4.45 gallons <br /> Volume of Piping and Conduits within Containment <br /> (pio X((0.11)^2 X 22.92)+((0.25)^2 X 17.25)+((0.38)^2 X 17.25)+ ((0.25)^2 X 2.25)+((0.29)^2 X 3.5))X 7.48 = 100.608 gallons <br /> Volume of Pedestal for Tank <br /> 2 X 1.75 X12.17 X 1.5 X 7.48 = 477.916 gallons <br /> Therefore total volume not available for containment = 582.97 gallons <br /> Volume available for oil retention = [(29.92 X 60 X 2.33)X 7.48-582.97 = 30,704 gallons <br /> > 26,700 gallons <br /> (Sufficient for 100%of container) <br /> Vouime of 25-year,24-hour precipitation(2.6 inches) = 2,909.4 gallons <br /> Volume required to contain capacity of production Fluid storage tank and 25-year,24-hour storm precipitation = 29,609 gallons <br /> Therefore,the containment is adequate to contain the volume of the oil-filled container in containment and volume of precipitation of a 25-year 24-hour storm in the containment. <br />