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Original 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 /> T Density of soil= 1.5 g/cm3 (approximately 1.26 tons/yard) <br /> 1- 10'to 20' (clay and sandy clay)samples UST @ 10', VW1-15' and B1-20'. <br /> 2- 20'to 35' (sand) samples B1-25', B1- 30', BI-35' , VW1-25', VW1-35', VW2-25' and B2-25'. <br /> - 3- 35' to 45' (clayey sand) samples VWl-35', VW1-40', B1-35', VW2-35' and VW2-40'. <br /> r== Mass Calculation, Layer 1- TPH-g <br /> 10 feet x 0.3048 m/ft=3.05 meters thickness <br /> -: 3.05 m x 3 m wide x 5 m length =46.5 m'volume <br /> 4.6 x 10'cm'volume <br /> 4.6 x 10'cm3 x 1.5g/cm3 =6.9 x 10'grams of soil <br /> 6.98 x 10'kg soil <br /> '. 6.98 x 10'kg of soil x 250 mg/kg(TPH-g)- 1.7 x 10'mg of TPH-g <br /> = 17 kg of TPH-g <br /> Mass Calculation, Layer 2 - TPH-g <br /> 15 feet x 0.3048 m/ft-4.5 meters thickness <br /> [ =i 4.5 m x 3 m wide x 5 m length =68.6 m3 volume <br /> -6.86 x 10'cm3 volume <br /> 6.86 x 10'cm3 x 1.5g/cm3 = 1.0 x 10 8 grams of soil <br /> =1.0 x 10'kg soil <br /> L 1.0 x 105 kg of soil x 670 mg/kg(TPH-g) =6.8 x 10'mg of TPH-g <br /> 68 kg of TPH-g <br /> Mass Calculation, Layer 3 -TPH-g <br /> 10 feet x 0.3048 m/ft=3.05 meters thickness <br /> 3.05 m x 3 m wide x 5 m length =46.5 m3 volume <br /> =4.6 x 10'cm'volume <br /> ti=s 4.6 x 10'cm'x 1.5g/cm3 =6.9 x 10'grams of soil <br /> =6.98x 10'kgsoil <br /> 6.98 x 10'kg of soil x 325 mg/kg(TPH-g)=2.3 x 10'mg of TPH-g <br /> 23 kg of TPH-g <br /> •r`1 Thickness Volume Mass of Soil Concentrations of Mass of Contaminants <br /> meters (cubic meters) (kilograms) Contaminants(mg/kg) (kilograms) <br /> .. 10 feet=6.05 m 46.5 69,800 TPH-g =250 TPH-g = 17 <br /> i;- 15 feet=4.5 m 68.6 100,000 TPH-g =670 TPH-g =6$ <br /> 10 feet=6.05 m 46.5 69,800 TPH-g =325 TPH-g =23 <br /> UAn estimated 108 kg of TPH-g were present in the soil prior to site mitigation. <br /> Advanced GeoEnvironmental,Inc. <br /> V'. <br />