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Table 1 Page 3 of 3 Pages <br /> Groundwater Monitoring Data <br /> ARCO Service Station 2168,411 Charter Way,Stockton,California <br /> Well Elevation Static Elevation <br /> Sample of Top Water of Total <br /> Number Date of Casing Level Groundwater TPHG Benzene Toluene Ethylbenzene Xylenes Observations <br /> MW-7 <br /> MW-7 10/28/93 888 3811 -2923 42,000 31,000 9,300 970 6,000 No FP, No S Yes O <br /> MW-7 03/23/94 888 3663 -2775 44,000 3,000 8,600 870 5,600 No FP <br /> MW-7 06/29/94 888 3739 2851 24 000 850 4 500 630 4 400 No FP S=NE,O=NE <br /> MW 7(39) 09/26/94 888 3867 -2979 46 000 1 600 6 400 610 4200 No FP,S=NE,O=NE <br /> MW-7 12/01/94 888 3887 2999 24 000 800 5,700 560 4,500 No FP,S=No,O=NE <br /> MW-7 02/16/95 880 Well Inaccessible <br /> TBLB <br /> TBLB 09/26/94 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA <br /> TBLB 12/01/94 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA <br /> TBLB 02/16/95 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA <br /> NA=Not applicable NS Not sampled NE-Not evaluated O-Obvious Product S-Sheen <br /> Analytical results in parts per billion FP Free product <br /> TPHG-Total petroleum hydrocarbons as gasoline <br /> Measurements in feet <br /> Elevation datum is mean sea level <br /> <-Below detection limit for analytical methods used <br /> Sample designattons <br /> MW-4(34)-Well ID and sample depth(feet) <br /> W 24-MW3R Water sample,sample depth(feet),R=Rtnsate blank <br /> x1s108051146031040595a1 As <br />