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• APPENDIX D ' Volume-Mass Calculation of Dissolved Hydrocarbons Former STOCKTON PLATING Facility ' 632 South E1 Dorado Street, Stockton, California Assumptions ' • A total volume of 348,184 gallons was extracted from between 17 March 2005 and 13 September 2005 based on effluent flow meter observations 'r • Data collected from the extraction wells averaged and are generally representative of extracted ground water conditions ' One gallon contains 3 785 liter so the volume of processed water expressed as liters is ' V= (348,184 gallons)(3 785 1/gal) = 1,317,876 liter processed water Total Petroleum Hydrocarbons as Gasoline (TPH-g) ' • Multiplying the volume of the processed water by the cumulative average TPH-g concentration between 17 March 2005 and 13 September 2005 yields the approximate mass of TPH-g removed from processed water e (1,700+27,000, 2,100+13,000, 320+5,500, 2,000+26,000, 470+27,000, 710+22,000, 1,300+15,000 pg/1)114 samples ' Sample average = 12,000 µg/l MaSSWH_g = (1,317,876 liter) • (12,000 µg/] TPH-g) =1.5 x 1010 gg TPH-g =15,825 g TPH-g 1 =15.825 kg TPH-g A conversion factor of 2 205 lb/kg can be used to convert TPH-g to pounds Mass.T?H_g=(15 825 kg TPH-g) • (2 205 lb/kg) = 34 89 lbs of TPH-g 1 Benzene • Multiplying the volume of the processed water by the cumulative average benzene 1 concentration between 17 March 2005 and 13 September 2005 yields the approximate mass of benzene removed from processed water 1 • (200+4,100, 270+2,400, 2+570, 290+4,000, 5 3+4,000, 79+2,500, 180+1,600Rg/1)112 Sample average= 1,680 gg/1 MassBenzene= (I.317,876 liter) • (1,680 µg/l benzene)=2.2 x 109µg Benzene 1 =2,218 g Benzene = 2.2 kg Benzene A conversion factor of 2 205 lb/kg can be used to convert Benzene to pounds 1 MBenzeue= (2 2 kg Benzene) • (2 205 lb/kg) =4.89 lbs of Benzene 1 i 1