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TAO 1 <br /> GROUND WATER MONITORING DATA <br /> Er,.on Sen►ec Station 7-3708 <br /> 2705 Counts Club BouleNard <br /> Stockton California <br /> Ground <br /> Reference Depth to Water Ethyl- I otal TPPH as Oxygenate <br /> Momtonng Elevation Ground Elevation Benzene Toluene benzene Xylenes gasoline MTBE Compounds <br /> Well Date A Water(ft) (ft) (µg/L) (µg/L) (µ91L) 4191L) (µg/L) (µg/L) (µg11-) Comments <br /> MW-3 08/73/91 0 52 15 15 -1463 NS NS NS NS NS NS NS No LPH or sheen <br /> 08/29/91 15 26 -1474 240 4 <2 5 3 5 630 NA NA No LPH or sheen <br /> 12/13/91 1540 -1488 270 8 <0 5 <0 5 560 NA NA No LPH or sheen <br /> 02/11/92 050 1447 -13 97 NS NS NS NS NS NS NS No LPH or sheen <br /> 03/18/92 1237 -1187 79 0 5 07 <0 5 170 NA NA No LPH or sheen <br /> 06/04/92 13 19 -1269 25 <0 <0 5 <0 5 87 NA NA No LPH or sheen <br /> 09/28/92 15 82 -15 32 300 5 9 5 1 73 680 NA NA No LPH or sheen <br /> 12/18/92 15 67 -15 17 1,700 150 91 140 4,000 NA NA No LPH or sheen <br /> 04/05/93 9.10 -8 90 360 54 30 75 1,100 NA NA No LPH or sheen <br /> 09/23/93 1276 -1226 1 0 0 9 <0 5 19 <50 NA NA 'lo LPH or sheen <br /> 11/15/93 13 52 -1102 36 -05 <0 5 <0 5 210 NA NA Vo LPH or sheen <br /> 02/10/94 1239 -1189 950 19 84 16 1,900 NA NA No LPH or sheen <br /> 05/31/94 1158 -1108 490 24 11 22 1,200 NA NA No LPH or sheen <br /> 08130194° 13 25 -1275 4201 1 8 3 8 <0 5 1,000 NA NA No LPH or sheen <br /> 11/22194d 1405 -13 55 48 <0 5 <0 5 <0 5 160 NA NA No LPH or sheen <br /> 01/12/95' 1283 -1233 81 0 5 14 <0 5 270 NA NA No LPH or sheen <br /> 03/31/95 NM NC 490 <5 0 67 <5 0 1,300 NA NA NM <br /> 04/05/95 856 -806 610 <5 0 83 <5 0 1,700 NA NA No LPH or sheen <br /> 07/14/95 NM NC 15 <0 5 <0 5 <0 5 <50 NA NA NM <br /> 07/17/95 1031 -981 NS NS NS NS NS NS NS No LPH or sheen <br /> 10/05/95 12 27 -1177 13 <0 5 <0 5 <0 5 <50 NA NA No LPH or sheen <br /> 04/02/96 7 19 -669 24 <0 5 <0 5 <0 5 <50 NA NA No LPH or sheen <br /> 07/31196 973 -923 580 <10 1 I <10 1,400 NA NA No LPH or sheen <br /> 10/23/96 1088 -1038 20 <0 5 <0 5 <0 5 55 29 NA No LPH or sheen <br /> 02/07/97 577 -527 8 1 <0 5 <0 5 <0 5 <50 NA NA No LPH or sheen <br /> 05/30/97 844 -794 23 <0 5 <0 5 <0 5 74 27 NA No LPH or sheen <br /> 08/20/97 1027 -977 <0 5 <0 5 <0 5 <0 5 <50 19 NA No LPH or sheen <br /> 11/24/97 1021 -971 1 0 <0 5 <0 5 <0 5 <50 NA 67'' No LPH or sheen <br /> 03/30/98 575 -5 25 <0 5 <0 5 <0 5 <0 5 <50 NA 77, No LPH or sheen <br /> 06/30/98 720 -670 <0 5 <i1 5 <0 5 <0 5 <50 NA 59' No LPH or sheen <br /> (Page 3 of 8) 93 809 YLS <br />