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Page 3 of 3 Pages <br /> Table 1 <br /> Groundwater Monitoring Data <br /> ARCO Service Station 2163 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 K enes 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 4,200 No FRS-NE,O=NE <br /> TBLB <br /> TBLB 49/26/94 NA NA NA <50 <0 5 <0 5 <0 5 <0 5 NA <br /> V <br /> NA=Not applicable NS-Not sampled NE Not evaluated O Obvious Product S-Sheen <br /> Analytical rsults 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 designations <br /> MW-4(34) Well ID and sample depth(feet) <br /> W-24 MW3R-Water sample,sample depth(feet) R=Rinsate blank <br /> I <br /> I <br /> 1 <br /> x1s10805114601ti111594B1 xis <br />