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Calculation of Mass of Contaminants <br /> ' thickness x area=volume <br /> volume x density =total mass of soil <br /> total mass of soil x concentration= mass of contaminants <br /> ' DSS Model <br /> Density of soil = 1.5 g/cm3 (approximately 1.26 tons/yard) <br /> to 18 (clay and sandy clay)samples Line I @ 6', B 1-15 and VEI-15 . <br /> 18' to 38' (clayey gravel) samples VEI- 25', B2-20' and B2-25 . <br /> 38' to 55' (sand) samples B1-45' and VE-40' <br /> ' DSS Model Example Calculation, Layer 1- benzene <br /> 22 feet x 0.3048 m/ft=6.7 meters thickness <br /> ' 6.7 m x 8 m wide x 8 m length =430 m3 volume <br /> =4.3 x 108 cm3 volume <br /> 4.3 x 108 cm3 x 1.5g/cm3 =6.4 x 10'grams of soil <br /> =6.4xlOskgsoil <br /> ' 6.4 x 105 kg of soil x 96 mg/kg(benzene) =6.2 x 10'mg of benzene <br /> = 62 kg of benzene <br /> MDSS Model Example Calculation, Layer 2 - benzene <br /> 20 feet x 0.3048 m/ft=6.1 meters thickness <br /> ' 6.1 m x 8 m wide x 8 m length =390 m3 volume <br /> =3.9 x 108 cm'volume <br /> 3.9 x 108 cm'x 1.5g/cm' =5.85 x 10 8 grams of soil <br /> ' =5.85 x 10 5 kg soil <br /> 5.85 x 105 kg of soil x 11 mg/kg(benzene) =6.4 x 10'mg of benzene <br /> = 6.4 kg of benzene <br /> ' DSS Model Example Calculation, Layer 3 - benzene <br /> ' 17 feet x 0.3048 m/ft=5.2 meters thickness <br /> 5.2 m x 8 m wide x 8 m length =333 rn'volume <br /> =3.3 x 10 8 cm3 volume <br />' 3.3 x 10 8 cm'x 1.5g/cm3 =5.0 x 10 8 grams of soil <br /> =5.0 x 10 5 kg soil <br /> 5.0 x 105 kg of soil x 0.04 mg/kg(benzene) = 1.9 x 10'mg of benzene <br /> =0.019 kg of benzene <br />