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West Lane Fuels <br /> 3302 West Lane <br /> Stockton,California <br /> Adsorbed Contaminant Mass Calculations-Removed <br /> Average Mass Soil Bulk Density <br /> Soil Volume Concentration Conversion (103 Ibs(fts) Contaminant Mass <br /> Isoconcentration Area ft' (m!]/Kg) m to K Sand-Silt Lbs. <br /> referto adjacenttable <br /> TPHd 1638 5564.75.. 0.000901 103 938.85 <br /> TPH9 1638 21.1 0.000001 103 3.56 <br /> BTEX 1638 1 0.70 1 0.00oo01 103 0.118 <br /> REMOVED ADSORBED MASS SUMMARY lbs) <br /> Hydrocarbons(fromTPHg 4 <br /> "Hydrocarbons(from TPHd)`; 939 ° <br /> NOTES a <br /> Approximately 60 cy(or 1640 of)were removed from the UST basin during the November 1997 UST Closure/Upgrade. <br /> Mass removal calculations assume the contaminants detected in soil sample S-17-T1n(Figure X)representative within the removed soi <br /> Mass removal calculations assume that an area 18 ft long by 13 it wide by 7 ft in thickness(from 17 to 24 ft bgs)was removed following the November 1997 Closur <br /> LEGEND <br /> F pi or 3.14 ASSUMPTIONS <br /> 77 porosity 1) Isoconcentrations interpolated to determine the area and volume calculations <br /> ft feet 2)Volume calculated using an ellipsoid:V=(413)•n-r1"r2"r3.OR V=(1.33)•3.14"V2W12'D/2 <br /> to cubic feet <br /> P9 micro grams <br /> L liters <br /> pg/L micrograms per liter <br /> mg milligrams <br /> .91, milligrams per microgram <br /> kg kilograms <br /> las pounds <br /> S-17-T1n S-19-E1n Average <br /> TPHd 22000 i 29 0 230 5564.75 i <br /> -FPH-9 83 e 0 0 1.4 21,1 <br /> Benzene 0.75 0 - 0 0 0.188 <br /> Toluene 0 0 y 0 0 0 <br /> Eth iebenzene 0.64 0 0 0 0.16 ., <br /> Xylenes 1.4 0 0 0.011 ^ 0.35 r <br /> STEX 2.79 <' 0 0 0.011 0.70 r <br /> .ems Ic <br /> Italic denote concentration below detection limit <br />