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' Soil Gas Purge Volume Calculation Table <br /> (Temporary Soil Gas Installation - Purge Volume Calculations) <br /> Sample Tubing <br /> Pie 3.14 3.14 3.14 <br /> Tubing Internal Diameter 0.187 0.187 0.187 inches (Teflon tubing 0.25"outside Dia.) <br /> ' <br /> Tubing Radius 0.0935 0.0935 0.0935 inches <br /> Tubing Radius Squared 0.0087 0.0087 0.0087 inches <br /> Tubing Length per foot 12 12 12 inches <br /> ' - Tubing Purge Volume 0.3294 0.3294 0.3294 cubic inches <br /> multiplied by conversion factor 16.387 16.387 16.387 cubic inches to mL <br /> = <br /> Tubing Pure Volume 5.40 5.40 5.40 mL cc per 1 foot of Tubing <br /> x tubing length in feet 12.0 12.0 12.0 feet <br /> ' =Tubing Purge Volume 64.78 1 64.78 1 64.78 ImL per 8 feet of Tubing <br /> plus <br /> Exposed Borehole <br /> Pie 3.14U1.01.01inchers <br /> 14 <br /> Exposed Borehole Diameter 1.00 inches <br /> Ex osed Borehole Radius 0.5 .5 inches <br /> Ex osed Borehole Radius S uared 0.3 .3 inches <br /> Ex osed Borehole Len th er foot 122 inches <br /> = Borehole Pure Volume 9.422 cubic inches <br /> multi lied b conversion factor 16.38787 cubic inches to mL <br /> - Borehole Pure Volume 154.37 .37 mL per 1 foot of Exposed Borehole <br /> x Exposed Borehole length in feet 0.51 0.5 1 0.5 Ifeet (Inlet Screen Probe Lenght) <br /> ' = Borehole Purge Volume 77.18 77.18 1 77.18 1 mL per 6 inches of Exposed Borehole <br /> =SubTotal, Both Purge Volumes 141.96 141.96 1 141.96 ImL <br /> x-#of Pure Volumes 1 3 7 Pure Volumes <br /> 42 <br /> 1 = Total Purge Volume 141.96 5.88 993.71 Ps <br /> Total urge Volume 0.14 0.43 0.99 1 Liters(from Purge Gandster Only) <br /> ' I Divided by 167 mUminute 167 167 167 1 mUminute Lab Calibrated Flow Rate <br /> otal Purge Time 0.85 1 2.55 1 5.95 IMInutes <br /> ' (-51 seconds) <br /> Volume Equation=Pie R`x Length <br /> Purge Volume=Inner Tubing Volume+Exposed Borehole Volume x 16.387 cubic inch to mL conversion factor <br /> The highlighted cells contain the calculation variables. <br /> 1 <br /> 1 <br /> S:\Shared\USTBara Lee\PfojedoCallforela\S$teckten(1444 South Lincoln),CAT008_09-Soil Gas Investigation\SGI Report\Supporting Documentation\Soil Gas Purge Volume Calculation <br /> ' Table(1_30_2009).xls <br />