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TAO <br /> GROUND WATER MONITORING DATA <br /> hy\on Service Station 7-3708 <br /> 2 705 Countn Club BouleVdrd <br /> Stockton, California <br /> Ground <br /> Reference Depth to Water Ethyl- Total TPPH as Oxygenate <br /> Momtonng Elevation Ground Elevation Beirrene Toluene benzene Xylenes gasoline MTBE Compounds <br /> Well Date (ft) Water(ft) (ft) (µglL) wglL) (µglL) (4g/L) (µglL) (uglL) (µg/L) Comments <br /> MW-4 02/10/92 -038 NM NC <0 5 09 <0 5 09 91° NA NA NM <br /> 02/11/92 13 61 -13 99 NS NS NS NS NS NS NS No LPH or sheen <br /> 03/18/92 1160 -1198 <() ; <0 5 <0 5 <0 5 91, NA NA No LPH or sheen <br /> 06/04/92 1232 -1270 06 -0 5 <0 5 <0 5 67 NA NA No LPH or sheen <br /> 09/28/92 15 01 -15 39 <0 5 <0 5 <0 5 <0 5 91 NA NA No LPH or sheen <br /> 12/18/92 14 80 -15 18 <0 5 <) 5 <0 5 <0 5 89 NA NA No LPH or sheen <br /> 04/05/93 860 -898 <0 5 <0 5 <0 5 <0 5 70` NA NA No LPH or sheen <br /> 09/23/93 1173 -12 It 07 1 4 07 3 <50 NA NA No LPH or sheen <br /> 11/15/93 1261 -12 99 <0 5 <0 5 <0 5 07 <50 NA NA No LPH or sheen <br /> 02/10/94 1158 -1196 <0 5 <0 5 <0 5 <0 5 <50 NA NA No LPH or sheen <br /> 05/31/94 1066 -1104 <0 5 <0 5 <0 5 <0 5 <50 NA NA No LPH or sheen <br /> 08/30194" 1232 -1270 <0 5 <0 5 <0 5 0 5 <50 NA NA No LPH or sheen <br /> 11/22194" 13 14 -13 52 <0 5 <0 5 <0 5 <0 5 <50 NA NA No LPH or sheen <br /> 01112195° 11 93 -1231 <0 5 �0 5 <0 5 <0 5 <50 NA NA No LPH or sheen <br /> 03/31/95 NM NC <0 5 <0 ; <0 5 <0 5 <50 NA NA NM <br /> 04/05/95 7 52 -790 <0 5 <0 5 <0 5 <0 5 <50 NA NA No LPH or sheen <br /> 07/17/95 941 -979 <0 5 <0 5 <0 5 <0 5 <50 NA NA No LPH or sheen <br /> 10/05/95 1141 -1179 1 9 <0 5 <0 5 <0 5 <50 NA NA Vo LPH or sheen <br /> 11/29/95 1156 -1194 0 5 <0 5 <0 5 <0 5 <50 NA NA 'Vo LPH or sheen <br /> 04/02/96 675 -7 13 1 9 <0 5 <0 5 085 <50 NA NA No LPH or sheen <br /> 07/31/96 905 -943 <0 5 <0 5 <0 5 <0 5 <50 NA NA No LPH or sheen <br /> 10/23/96 1006 -1044 <0 5 <0 5 <0 5 <0 5 <50 <5 0 NA No LPH or sheen <br /> 02/07/97 5 18 -5 56 14 <0 5 <0 5 <0 5 <50 NA NA No LPH or sheen <br /> 05/30/97 753 -791 <0 5 <0 5 <0 5 <0 5 <50 10 NA No LPH or sheen <br /> 08/20/97 932 -970 <0 5 <0 5 <0 5 <0 5 <50 60 NA No LPH or sheen <br /> 11/24/97 981 -10 19 <1 5 <0 5 <0 5 <0 5 <50 NA 3 3h No LPH or sheen <br /> 03/30/98 505 -543 <0 5 --0 5 <0 5 <0 5 <50 NA 6811 No LPH or sheen <br /> 06/30/98 646 -684 <0 5 <0 5 <0 5 <0 5 <50 NA 3 51' No LPH or sheen <br /> {Page 4 of 8} 93 8091LS <br />