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Table 1 Page 3 of <br /> 3 <br /> Groundwater Monitoring Data <br /> ARCO Service Station No 2076, 800 East Kettleman Lane, Lodi, California <br /> Well Elevation Static Elevation <br /> Sample of Top Water of Total Total <br /> Number Date of Casing Level Groundwater TPHG Benzene Toluene Eth lbencene Xylenes Lead MTBE Observations <br /> MW-4 <br /> W-52-MW4 10/23/92 5286 5240 046 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S No O <br /> MW-4(62) 02/24/93 5408 -122 <50 <0 5 <0 5 <0 5 <0 5 NA No FP, No S,No 0 <br /> MW4 03/01/93 5411 -125 NA NA NA NA NA NA No FP,No S,No 0 <br /> MW4 04/01/93 54 18 -132 NA NA NA NA NA NA No FP,No S,No O <br /> MW-4 04/20/93 5406 -120 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0 <br /> MW-4 04/28/93 5402 -1 16 NA NA NA NA NA NA No FP, No S,No 0 <br /> MW4 05/24/93 5373 -087 NA NA NA NA NA NA No FP,No S,No 0 <br /> MW4 06/14/93 5357 -071 NA NA NA NA NA NA No FP,No S,No 0 <br /> MW-4 08/18/93 5279 007 <50 <0 5 <0 5 <0 5 <0 5 <2 0 No FP,No S,No 0 <br /> MW-4 10/27/93 5225 061 <50 <0 5 <0 5 <0 5 <0 5 <2 0 No FP,No S,No 0 <br /> MW4 03/23/94 5408 -122 <10 <0 3 <0 3 <0 3 <0 3 NA No FP,No S,No 0 <br /> MW4 06/24/94 5340 -054 <10 <0 3 <0 3 <0 3 <0 3 NA No FP,No S,No 0 <br /> MW4(53) 09/27/94 5209 077 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0 <br /> MW-4 12/01/94 5304 -018 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE <br /> MW4 02/14/95 5392 -106 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,O=NE <br /> MW-4(62) 05/15/95 54 10 -124 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No O <br /> MW-4(62) 08/11/95 5329 -043 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No O <br /> MW-4(62) 11/15/95 5302 -016 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No 0 <br /> MW-4 02/02/96 5384 -098 <50 <0 5 <0 5 <0 5 <0 5 NA No FP,No S,No O <br /> MW-4 02/27/97 5450 -164 <50 <0 5 <0 5 <0 5 <0 5 NA <3 No FP,No S,No O <br /> TBLB 03/23/94 NM NM <10 <0 3 <0 3 <0 3 <0 5 NA NM <br /> TBLB 06/24/94 NM NM <10 <0 3 <0 3 <0 3 <0 5 NA NM <br /> TBLB 09/27/94 NM NM <50 <0 5 <0 5 <0 5 <0 5 NA NM <br /> TBLB 12/01/94 NM NM <50 <0 5 <0 5 <0 5 <0 5 NA NM <br /> Anal)tical results in pans per billion(ppb) < Below detection limit for analytical methods used <br /> 1levation datum is mean sea level NM-Not measured TBLB-Trip Blank <br /> HG-Total petroleum hydrocarbons as gasoline FP Free product NA-Not analyzed <br /> MTBE=Meth7I ten-butylether NE=Not evaluated <br /> MW-4(62)-Well ID and sample depth in feet <br /> -W-50-MW3 Water sample,sample de m feet <br /> N\x1sW05\J4405032097M1 As Revision 1 4110/97 <br />