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• �4of4 <br /> Groundwater Monitoring Data <br /> ARCO Service Station No 648, 1612 Hammer Lane, Stockton, California <br /> Well Elevation Static Top Elevation <br /> Sample of Top Water of of Ethyl- Total <br /> Number Date of Casing Level Screen Groundwater TPHG Benzene Toluene benzene Xylenes; MTBE Observations <br /> MW-5 (tont) <br /> MW-5(61) 12/04/95 937 3863 -2926 1,200 55 11 83 92 NA No FP,No S,Yes O <br /> MW-5 02/02/96 937 3666 -2729 270 76 15 11 98 NA No FP,No S,Yes 0 <br /> MW-5(60) 05/10/96 937 34 15 -2478 5,700 420 180 380 610 34 No FP,No S,Yes 0 <br /> MW-5(60) 08/29/96 937 3599 -2662 9,600 510 90 710 970 39 No FP,No S,Yes 0 <br /> MW-6 <br /> MW-6(58) 12/16/93 895 4277 4000 -3382 <50 <0 5 <0 6 <0 5 <0 5 NA No FP,No S,No 0 <br /> MW-6(39) 04/08/94 895 3973 -3078 28 48 39 39 22 NA No FP,No S,O=NE <br /> MW-6 06/22/94 895 4031 -3136 <10 <0 3 <0 3 <0 3 <0 5 NA No FP,No S,O=NE <br /> A4W-6(43) 09/23/94 895 4259 -3364 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE <br /> MW-6(46) 12/02/94 895 4166 -3271 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE <br /> NIW-6(58) 02/15/95 895 4002 -3107 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE <br /> NIW-6(58) 05/12/95 895 3826 -2931 <50 <0 5 <0 5 <0 5 <0 5 NA No FP, No S,No 0 <br /> MW-6(59) 08/29/95 895 3991 -3096 **<52 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No O <br /> MW-6(58) 12/04/95 895 3838 -2943 **<70 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0 <br /> N4W-6 02/02/96 895 3638 -2743 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No O <br /> MW-6(59) 05/10/96 895 3388 -2493 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No O <br /> MW-6(59) 08/29/96 895 3566 -2671 <50 <0 5 <0 5 <0 5 <0 5 <3 No FP,No S,No 0 <br /> Analytical results in pans per billion <br /> HG-Total petroleum h}drocarbons as gasoline <br /> MTBE-Meth)I ten butri]ether <br /> Elevation datum is mean sea level <br /> Measurements in feet <br /> NA-Not anah zed NM Not measured NE-Not evaluated <br /> * Well pa%ed m er on 0310-4)93 **-Raised MRL due to matrix interference <br /> *** The sample contains a lower boiling point h)drocatbon mixture quantified as gasoline,the chromatogram does not match the t)pical gasoline fingerprint <br /> Bailer blank F11 Free product S- Sheen O-Obvious product odor <br /> G-$elow detection limns used by laborator) <br /> Sample designations <br /> MW 4(34) Well ID and sample de (feet) <br /> N\xls\0805V 4005\092496MI As Revision 0 10/15196 <br />