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1 <br /> ' APPENDIX F <br /> • MASS OF PETROLEUM HYDROCARBON-UMPACTED SOIL <br /> ' LATHROP GAS AND FOOD MART <br /> 1.4800 South Highway 99,Manteca, California <br /> ' F.O. <br /> FORMULAS AND METHODS <br /> ' The area of lateral extent of impacted soil was determined from Figure 7, vertical thickness was <br /> determined from cross section A-A' (Figure 5) Average concentrations were estimated from soil <br /> ' data and cross sections Calculated volumes and masses were rounded for presentation on tables <br /> Calculations were performed to a minimum of two decimal places <br /> 1 <br /> 1 g <br /> C <br /> 10 <br /> 1 <br /> 1 <br /> 1 <br /> Sample Calculations: <br /> Volume Determination (Between the 1,000 and 100 mg/kg isosurfaces) <br /> Assuming that the volume of TPH-impacted soil can be approximated by a cylindrical shape (A) <br /> Volume A=Area x Length <br /> ' Area(A)= n Rz <br /> n =3 14 <br /> ' Radius (R) <br /> Length (L) <br /> ' Advanced GeoEnvironmental,Inc. <br /> 1 <br />