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TABLE 2 GROUNDWATER MONITORING DATA,FORMER EXXON RS 7-3708,2705 COUNTRY CLUB BOULEVARD,STOCKTON,CA <br /> Other <br /> Reference Depth to Groundwater Ethyl- Total TPH as Oxygenates and Dissolved <br /> Monitoring Elevation Groundwater Elevation Benzene Toluene benzene Xylenes gasoline MTBE Additives Lead <br /> Well Date (feet) (feet) (feet) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) (µg/L) <br /> VEW3 12/01/95 SITE DIVESTED BY EXXONMOBIL <br /> VEW3 03/05/99 NM' 7.03 NC <0.5 <0.5 <0.5 <0.5 <50 <2.5 NA NA <br /> VEW3 05/14/99 NM NM NC NS NS NS NS NS NS NS NS <br /> VEW3 06/04/99 NM NM NC NS NS NS NS NS NS NS NS <br /> VEW3 08/31/99 NM NM NC NS NS NS NS NS NS NS NS <br /> VEW3 11/23/99 NM NM NC NS NS NS NS NS NS NS NS <br /> VEW3 02/10/00 NM NM NC NS NS NS NS NS NS NS NS <br /> VEW3 05/17/00 NM NM NC NS NS NS NS NS NS NS NS <br /> VEW3 08/07/00 NM dry NC NS NS NS NS NS NS NS NS <br /> VEW3 11/06/00 NM NM NC NS NS NS NS NS NS NS, NS <br /> VEW3 02/26/01 NM 6.82 NC <0.5 <0.5 <0.5 <0.5 <50 2.1/<5 h NA NA <br /> VEW3 05/10/01 NM 7.41 NC <0.5 <0.5 <0.5 <0.5 <50 <5h NA NA <br /> VEW3 08/16/01 NM dry NC NS NS NS NS NS NS NS NS <br /> VEW3 11/20/01 NM dry NC NS NS NS NS NS NS NS NS <br /> VEW3 03/12/02 o NM 7.25 NC 12.0 <10 <10 <10 16,600 30,300h 80.0-/1,050" NA <br /> VEW3 05/02/02 o NM 7.50 NC <0.5 <0.5 <0.5 <0.5 12,900 16,35e 1,060" NA <br /> VEW3 09/23/02 NM 8.68 NC NS NS NS NS NS NS NS NS <br /> VEW3 12/06/02 o NM 8.71 NC 344 2.50 16.5 17.8 NA 54,000h ND NA <br /> VEW3 03/17/03 NM 7.90 NC 126 25.5 12.5 3.5 7,080 11,600h 30.4'"/21,000" NA <br /> a=Total volatile hydrocarbons. <br /> b=Result is an estimated value because it exceeds the linear range. <br /> c=A typical chromatogram with unidentified peak(s)within the range of gasoline hydrocarbons. Chlorinated hydrocarbons are suspected. <br /> A groundwater sample collected from monitoring well MW6 on 4/17/92 contained chlorobennene and 1,2-dichlorobenzene. <br /> d=A typical chromatogram. Analysis of this sample by EPA Method 624 on 4/17/92(past EPA recommended holding time)was positive for the <br /> following chlorinated hydrocarbons:vinylchloride,cis-1,2-dichloroethene,trichloroethane and tetrachloroethane.These peaks resulted in a positive <br /> G:\Projects\73709\WblicEegW\3709gw2.xls Page Is of 19 <br />