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Estimated Contaminant Mass in Soil (Cylindrical) <br /> Estimated Mass Recalculated(based on boring on confirmation samples) <br /> Mass=(Volume of impacted zone)(soil density)(Average Concentration)(E-6); <br /> Soil density assumed 45.5 kg/cu. ft.(100lb/cu. ft.); <br /> Estimated Mass Pre-Excavation <br /> Volume in cu. ft.;thickness of impacted zones are 18.5,22.5,24.5,and 26 ft,over estimated 13ft max radius and 8 ft min radius <br /> Max Radius of Min Radius of Mass of Mass of <br /> h) <br /> (Pi x r1 x r2 x h) (mg/kg)Volume (cu. Average Concentration <br /> Contaminant Impacted Area Impacted Area Contaminant Contaminant • <br /> (ft) ft (kg) (lbs) <br /> TPHg>1000 ppin 6 3 1047 1700 81.0 178.1 <br /> TPHg 100-1000 ppin 10.5 6 3408 550 85.3 187.7 <br /> TPHg 10-100 ppm 12 7 2013 55 5.0 11.1 <br /> TPHg 1-10 ppra 13 8 2030 5.5 0.5 1.1 <br /> 1721 378 <br /> Estimated Mass Post-Excavation <br /> Volume in cu. ft.;thickness of impacted zones are 8, 12, 14,and 15.5 ft.over estimated 13ft max radius and 8 ft min radius <br /> Max Radius of Min Radius of Mass of Mass of <br /> h) <br /> (pi x r1 x r2 x h) <br /> Contaminant Impacted Area Impacted Area Volume (cu. Average Concentration Contaminant Contaminant <br /> (ft) (ft) (mg/kg) (kg) (Ibs) <br /> TPHg>1000 ppm 6 3 453 1700 35.0 77.0 <br /> TPHg 100-1000 ppin 10.5 6 1923 550 48.1 105.9 <br /> TPHg 10-100ppm 12 7 1320 55 3.3 7.3 <br /> TPHg 1-10 ppra 13 8 1370 5.5 0.3 0.8 <br /> 871 191 <br /> Estimated Mass Removed Via Excavation 187 49.48% <br />