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C C f It [ [ { t C t C t C t C { t t C <br /> West Lane Fuels <br /> 3302 West Lane <br /> Stockton, California Dissolved Contaminant Mass Calculations <br /> MASS <br /> Contaminant <br /> Conversion Concentration Conversion <br /> 1,2-DCA Volume(ft") (28.32 Uft3) (ug/L) '"sI„ ) Porosity(a)) Mass(kg) Mass(lbs) <br /> 10 ug/L M = 6,697 28.32 10 1.00E-09 0.30 0.00057 0.00152 <br /> 1 u /L M = 45,623 28.32 1 1.00E-09 0.30 0.00039 0.00104 <br /> Contaminant <br /> Conversion Concentration Conversion( <br /> BTEX Volume(ft3) (28.32 Uft3) (ug/L) MgIt' ) Porosity(77) Mass(kg) Mass(Ibs) <br /> 10 ug/L M = 10,045 28.32 10 1.00E-09 0.30 0.00085 0.00229 <br /> 1 u /L M = 21,347 28.32 1 1.00E-09 0.30 0.00018 0.00049 <br /> Contaminant <br /> Conversion Concentration Conversion( <br /> TPHg Volume{ft3) (28.32 U t3) (ug1L) mg/„ ) Porosity(r)) Mass(kg) Mass(lbs) <br /> 100 u /L M = 15,068 28.32 100 1.00E-09 0.30 0.01280 0.03430 <br /> 50 u /L M = 55,669 28.32 50 1.00E-09 0.30 0.02365 0.06336 <br /> Contaminant <br /> Conversion Concentration Conversion( <br /> TPHd Volume(ft3) (28.32 Uft) (ug/L) 191 ) Porosity(71) Mass(kg) Mass(lbs) <br /> 100 u /L M = 14,064 28.32 100 1.00E-09 0.30 0.01195 0.03201 <br /> 50 u /L M = 40,182 28.32 50 1.00E-09 0.30 0.01707 0.04573 <br /> Contaminant <br /> Conversion Concentration Conversion( <br /> MTBE Volume(ft) 128.32 Uft) (ug1L) '91.g) Porosity(77) Mass(kg) Mass(lbs) <br /> 10 u /L M = 6,697 28.32 10 1.00E-09 0.30 0.00057 0.00152 <br /> 1 ug/L M = 82,247 28.32 1 1.00E-09 0.30 0.00070 0.00187 <br /> 0.5 u /L M = 78,062 28.32 1 1.00E-09 0.30 0.00033 0.00089 <br /> LEGEND DISSOLVED MASS SUMMARY(lbs) <br /> I I pi or 3.14 Assumptions 1,2-DCA TOTAL 0.0026 <br /> rl porosity 1)Dissolved contaminant concentrations derived BTEX TOTAL 0.0028 <br /> ft feet from soil borings and monitoring wells TPHq TOTAL O.O977 <br /> ft' cubic feet 2) Isoconcentrations interpolated to determine the TPHd TOTAL 0.0777 <br /> Ng micro grams area and volume calculations MTBE TOTAL 0.0043 <br /> L liters 3) Volume calculated using an ellipsoid:V=(4/3) <br /> pg/L micrograms per liter *n*rl *r2*r3* OR V=(4/3)*fl*U2*W/2 TOTAL DISSOLVED MASS SUMMARY(lbs) <br /> mg milligrams *D/2 1,2-DCA <br /> 0.0026 <br /> "'y/ue milligrams per microgram 4) Depth(D)equal to the average observed Hydrocarbons(from TPHg) 0.0977 <br /> kg kilograms saturated thickness from soil boring TPHd 0.0777 <br /> lbs pounds <br /> MTBE 0.0043 <br />