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PG&E's Tracy Service Center, 502 East Grant Line Road, Tracy <br /> Mass Balance for 1987 Conditions <br /> estimated 1987 estimated1987 avg cone. average TPH <br /> depth contamination contamination cubic ft of lbs soil total weight TPH fraction of weight volume <br /> ft( begs) width ft * length (ft)* affected soil per cu `* soil lbs) (mg/kg)* soil (gm/gm) TPH TPH!gall# <br /> 5.0-5.5' 20 30 300 110 33,000 10 0.00001 0.33 0.06 <br /> 5.5-6.5' 15 35 525 110 57,750 50 0.00005 2.89 0.49 <br /> 6.5-7.5' 15 40 600 110 66,000 500 0.0005 33.00 5.57 <br /> 7.5-8.5' 15 35 525 110 57,750 1400 0.0014 80.85 13.66 <br /> 8.5-9.0' 15 30 225 110 24,750 432 0.000432 10.69. 1.81 <br /> 9.0-10.0' 15 30 450 110 49,500 25 0.000025 1.24 0.21 <br /> TOTAL 129 22 <br /> *= Estimated from data collected in 1987. <br /> **=Average weight of soil from literature. <br /> #=Assume weight of gasoline is 5.92 lb/gal. <br />