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TIP,e 1 <br /> Groundwater Monitoring Data Page 5 of 5 <br /> Former ARCO Service Station No. 2168, 441 Charter Way, Stockton, California <br /> Well Elevation Static Elevation Top <br /> Sample of Top Water of of Total <br /> Number Date of Casmg Level Groundwater Screen TPHG Benzene Toluene Eth lbenzene Xylenes. MTBE Observations <br /> MW-7 <br /> MW-7 11/25/96 888 2687 -1799 52,000 3,500 9,100 810 4,700 <600** No FP,No S, Yes O <br /> MW-7 02/24/97 888 2289 -1401 25,000 1,300 3,700 500 2,200 <700** No FP,No S,Yes O <br /> TBLB <br /> TBLB 09/26/94 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> TBLB 12/01/94 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> TBLB 02/16/95 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA NA <br /> NA =Not applicable NS=Not sampled NE=Not evaluated 0=Odor S=Sheen FP=Free product.. <br /> Analytical results in parts per billion <br /> Measurements m feet <br /> HG=Total petroleum h)drocarbons as gasolme. <br /> levation datum is mean sea level <br /> Below detection limit for analytical methods used <br /> *=Raised method reportmg limit due to high analyte concentration mqurrmg sample dilution <br /> **=Raised method repotting limit due to matrix interference. <br /> e designatiolls., <br /> MW 4(34)-Well ID and sample depth(feet) <br /> W 24-MW3R-Water sample,sample d {feet),R=Rtnsate blank <br /> I <br /> NV{L.S\0805V4601V140897M1 As Revision 5/1/97 <br />