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• Ms Margaret Lagorio Project 797615 <br /> September 10, 1999 <br /> Page 3 <br /> Soil Interval Estimated Gallons TPHG Estimated <br /> (ft-bgs) TPHG Mass BTEX Mass <br /> 10 to 25 ft 21,770 pounds 3,528 gallons 1,949 pounds <br /> 26 to 45 ft 83,510 pounds 13,534 gallons 9,873 pounds <br /> 46 to 65 ft 54,971 pounds 8,909 gallons 5,010 pounds <br /> 66 to 85 ft 42,821 pounds 6,940 gallons 659 pounds <br /> estimated mass � ry2,315 pounds 375 gallons- 602 pounds <br /> removed during <br /> excavation <br /> Totals 200,757 pounds 32,537 gallons 17,339 pounds <br /> conversion factor 1 gallon gasoline = 6 17 pounds <br /> The revised mass estimate calculations are presented in Appendix C <br /> CHROMATOGRAM EVALUATION <br /> Sequoia Analytical performed analysis of soil samples collected during site assessment <br /> activities conducted between 1991 and 1995 Sequoia is currently reviewing <br /> chromatograms to evaluate the presence or absence of MTBE Results of this review will <br /> be presented in a future letter report <br /> CP\C 1Archrve\Arco16100\Reports�6100p101 doe doc-9811sg 1 Pinnacle <br />