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TABLE 2 GROUND WATER MONITORING DATA Exxon Service Station 7-3708 2705 Country Club Boulevard Stockton, California Depth to Ground Reference Ground Water Ethyl- Total TPPH as Momtonng Elevation Water Elevation Benzene Toluene benzene Xylenes gasoline MTBE Well Date (ft) (ft) (ft) (n/L) (µg/L) (gg/L) (�Lg(L) (gg/1.) 01g/L) Comments MW-3 08/23/91 052 15 15 -14 63 NS NS NS NS NS NS No LPH or sheen 08129/9I 1526 -1474 240 3 4 <2 5 3 5 630 NA No LPH or sheen 12113/9I 1540 -14 88 270 8 <0 5 <0 5 560 NA No LPH or sheen 02/11/92 0 50 1447 -13 97 NS NS NS NS NS NS No LPH or sheen 03/18/92 1237 -1187 79 05 0 7 <0 5 170 NA No LPH or sheen 06/04/92 13 19 -1269 25 <0 5 <0 5 <0 5 87 NA No LPH or sheen 09/28/92 1582 -1532 300 5 9 5 1 73 680 NA No LPH or sheen 12/18/92 1567 -15 17 1,700 150 91 140 4,000 NA No LPH or sheen 04/05/93 940 -8 90 360 54 30 75 1,100 NA No LPH or sheen 09/23/93 1276 -12 26 10 0 9 <0 5 19 <50 NA No LPH or sheen 11/15/93 13 52 -13 02 36 <0 5 <0 5 <0 5 210 NA No LPH or sheen 02/10/94 1239 -1189 950 19 84 16 1,900 NA No LPH or sheen 05/31/94 1158 -1108 490 2 4 11 2 2 1,200 NA No LPH or sheen 08/30/94" 1325 -1275 420" 18 3 8 <0 5 1,000 NA No LPH or sheen 11/22194" 1405 -1355 48 <0 5 <0 5 <0 5 160 NA No LPH or sheen 01/12/950 1283 -1233 81 0 5 14 <0 5 270 NA No LPH or sheen 03/31/95 NM NC 490 <5 0 67 <5 0 1,300 NA NM 04/05/95 856 -806 61.0 <5 0 83 <5 0 1,700 NA No LPH or sheen 07/14/95 NM NC 15 <0 5 <0 5 <0 5 <50 NA NM 07/17/95 1031 -981 NS NS NS NS NS NS No LPH or sheen 10/05/95 1227 -1177 13 <0 5 <0 5 <0 5 <50 NA No LPH or sheen 04/02/96 7 19 -669 24 <0 5 <0 5 <0 5 <50 NA No LPH or sheen 07/31/96 973 -9 23 580 <10 11 <10 1,400 NA No LPH or sheen 10/23/96 1088 -1038 20 <0 5 <0 5 <0 5 55 29 No LPH or sheen 02/07/97 577 -527 8 1 <0 5 <0 5 <0 5 <50 NA No LPH or sheen 05/30/97 844 -7 94 23 <0 5 <0 5 <0 5 74 27 No LPH or sheen • 0 {Page 3 ole-809 M