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Table r <br /> PG&E's Tracy Service Center, 502 East Grant Line Road, Tracy <br /> Mass Balance for 1987 Conditions <br /> estimated 1987 estimated 1987 avg conc average TPH <br /> depth contamination contamination cubic ft of lbs soil total weight TPH fraction of weight volume <br /> (ft bas) width (ft)* length (ft)* affected soilPe[cu ft**- soil (lbs) �Ikgr Boit (gmIPH_(Ibs) TPH1gaIIL# <br /> 5 0-5 5' 20 30 300 110 33,000 10 000001 033 006 <br /> 5 5-6 5' 15 35 525 910 57,750 50 000005 289 049 <br /> 6 5-7 5' 15 40 600 110 66,000 500 00005 3300 557 <br /> 7 5-8 5' 15 35 525 110 57,750 1400 00014 8085 1366 <br /> 8 5-9 0' 15 30 225 110 24,750 432 0000432 1069 181 <br /> 90-100, 15 30 450 110 49,500 25 0000025 124 021 <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 />