ARCHIVED REPORTS XR0009874 - Laserfiche WebLink

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HYDROCARBON-IMPACTED SOIL VOLUME ASSUMPTIONS AND CALCULATIONS Volume of impacted soil removed from the vicinity of the former northern dispenser during the over- excavation procedures Based on the hydrocarbon concentration of TPH-g in soil probe bonngs, excavated stockpile soil samples and highest concentration of TPH-g in soil at the east wall of the over excavation, the following calculation for the removed the petroleum as gasoline has been made The Impacted soil from the soil boring,UST excavation and soil stockpile samples had the following ' TPH-g concentrations 133-10 - 340 mg/kg,133-15 - 110 mg/kg, excavation sample NW- 730 mg/kg, SP 1 A-1 D - 200 mg/kg, SP2E-H - 200 mg/kg ' This volume was calculated from soil sample data and the weight of the soil stockpiled from the excavations A total of 236 5 tons of Impacted soil were disposed with an average concentration of ' 315 milligrams per kilogram of gasoline Calculation ' tons • 2000 pounds/ton =pounds soil pounds soil • 0 454 kilograms/lbs=kilograms soil kilograms soil • average concentration in mg/kg of gasoline =milligrams of gasoline milligrams of gasoline— 1,000 milligram/grams = grams of gasoline volume ' grams of gasoline— 0 74 grams/cm3 = cm3 of gasoline (cm3 of diesel — 3,785 cm31gallon) = gallons of gasoline removed ' weight 236 5 tons removed • 2000 pounds/ton= 473,000 pounds soil I473,000 pounds soil • 0 454 kilograms/lbs = 214,742 kilograms soil t214,742 kilograms soil • 315 mg/kg of gasoline = 67,643,730 milligrams of gasoline (67 kilograms of gasoline) 67,643,730 milligrams of gasoline — 1,000 milligram/grams = 67,673 7 grams of gasoline volume 67,673 7 grams of gasoline— 0 74 grams/cm3 = 50,053 4 cm3 of gasoline (50,053 4 cm3 of gasoline — 3,785 cm3/gallon) = 13 22 gallons of gasoline removed Advanced GeoEn viron mental,Inc