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CALCULATION SHEET F-1 <br /> SOIL VAPOR EXTRACTION TESTING — DARCY ANALYSIS <br /> Former Canteen Facility <br /> 1500 Shaw Road <br /> Stockton, California <br /> SVE Well —VE-1 <br /> Piezometers <br /> Parameter Units Definitions MW-13 VE-2A VE-213 <br /> Q scfm Flow Rate from SVE Well 390 390 390 <br /> Pb Pa Atmospheric Pressure 101,325 101,325 101,325 <br /> 9 Pa*sec Viscosity of Air 1 80E-05 1 80E-05 1 80E-05 <br /> Re feet Radial Distance from SVE Well 195 288 288 <br /> Rw feet Radius of SVE Well 0 417 0 417 0 417 <br /> ln(Re 1 R,) --- Natural Log of Ratio 3 846 4 234 4 234 <br /> n --- Pi 314159 314159 314159 <br /> h feet Length of Exposed Screen In SVE Well 300 300 300 <br /> V. in w c Vacuum at SVE Well 590 590 590 <br /> Ve in w c Vacuum at Observation Point "e" 0200 0 100 0 100 <br /> PW Pa Absolute Pressure at SVE Well 86,643 86,643 86,643 <br /> Pe Pa Absolute Pressure at Point "e" 101,275 101,300 101,300 <br /> (Pe2 - Pw2) --- Difference of the Squares 2 750E+09 2 755E+09 2 755E+09 <br /> Darcy's Equation Permeability Values <br /> k cm2 Soil Permeability 1 63E-08 I 1.80E-08 1 80E-08 <br /> AVERAGE SOIL PERMEABILITY:, 1 74E-08 Cruz <br /> GEOMETRIC MEAN SOIL PERMEABILITY: 1.74E-08 cm2 <br /> DARCY'S EQUATION NOTES <br /> The following configuration of Darcy's Equation was utilized to determine the apparent soil per- <br /> meability at the site <br /> Q Pb In (R./R,,) C <br /> k = <br /> 7chWe2 - PW2) <br /> where <br /> k = Soil Permeability (cm2) <br /> Q = SVE Flow Rate (scfm) <br /> Pb = Base (Atmospheric) Pressure (Pa) <br /> u = Viscosity of Air (Pa * sec) <br /> Re = Radial distance from SVE well to Observation Point "e" (feet) <br /> Rw = Radius of SVE Well (feet) <br /> C Conversion Factor, C = 15 48 (cm2 * min)1(ft2 *sec) <br /> h Length of exposed screen at SVE well (feet) <br /> Pe - Absolute Pressure at Observation Point "e" (Pa) <br /> PW Absolute Pressure at SVE Well "e" (Pa) <br />