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Table 1 Groundwater Monitoring Data ARCO Service Station 0760 225 South Cherokee Lane Lodi California Well Elevation Static Elevation Sample of Top Water of Total Number Date of Casing Level Groundwater TPHG TPHD Benzene Toluene Ethylbenzene Xylenes TOG Observations MW-1 03/21/94 5291 5990 -699 60 <10 <0 3 0 5 04 07 '<1000 No FP No S 06/24/94 5291 6172 881 38 <10 03 04 03 1 7 <1000 No FP,No S 09/27/94 5291 6454 -1163 380 140 34 14 <0 5 <0 5 <5000 No FP,No S 12 02194 5291 6200 909 110 160 <0 5 12 <0 5 <05 <5000 No FP No S MW-2 03/21/94 5327 6026 -699 93 <10 <0 3 0 9 06 1 3 ' <5000 No FP No S 06/24/94 5327 6240 913 31 <10 <0 3 <0 3 <0 3 <0 5 <1000 No FP No S 09/27/94 5327 6488 -1161 130 <50 <0 5 <0 5 <0 5 <0 5 <5000 No FP No S 12/02/94 5327 6231 -904 <50 170 <0 5 1 5 <0 5 <0 5 <5000 No FP No S MW-3 03/21/94 5438 6126 688 130 <10 04 0 7 05 11 "<5000 No FP No S 06/24/94 5438 6339 901 58 <10 <0 3 0 3 <0 3 <0 5 <1000 No FP,No S 09/27/94 5438 6583 1145 290 <50 4 5 51 <0 5 0 7 <5000 No FP,No S 12/02/94 5439 6328 -890 <50 110 <0 5 05 <0 5 <0 5 <5000 No FP No S TBLB 03/21/94 NM NM NM <10 NA <0 3 <0 3 <0 3 <0 5 NA NA 06/24194 NM NM NM <10 NA <0 3 <0 3 <0 3 <0 3 NA NA 09/27/94 NM NM NM <50 NA <0 5 <0 5 <0 5 <0 5 NA NA 12/02/94 NM NM NM <50 NA <0 5 09 <0 5 <0 5 NA NA Analytical rsults in parts per bllllon Mwisurements In feet Elevation datum Is mean sea level TPHG 'Total petroleum hydrocarbons as gasoline TPHD Total petroleum hydrocarbons as diesel TOG Total oil and grease FP-Free product NA Not analyzed NM-Not measured TBLB-trip blank EPA Method 413 2(Infrared Spectrometry) "-EPA Method 4131 (Gravimetuc Analysis) '"-The sample contains a lower boiling point hydrocarbon mixture quantified as gasoline,the chromatogram does not match the typical gasoline < Below detection limit for analytical methods used AsWSOS14201111079481 As