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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) (99/L) (µg/L)-_ (µg/L) (µg/1.,) (µg/L)_- (pg/L) (µg/L) - (gg/L) <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 682 NC <0 5 <0 5 <0 5 <0 5 <50 2 1/<5n NA NA <br /> VEW3 05/10/01 NM 741 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 725 NC 120 <10 <10 <10 16,600 30,300 80 Om/1,050" NA <br /> VEW3 05/02/02 o NM 750 NC <0 5 <0 5 <0 5 <0 5 12,900 16,350 1,060° NA <br /> VEW3 09/23/02 NM 868 NC NS NS NS NS NS NS NS NS <br /> VEW3 12/06/02 o NM 871 NC 344 250 165 178 NA 54,000h ND NA <br /> VEW3 03/17/03 NM 790 NC 126 255 125 3 5 7,080 11,600" 30 4"'121,000" NA <br /> VEW3 05/29/03 NM 841 NC 285 30 25 365 7,680 3,150 16 5m123,400" NA <br /> a= l oral votattle hydrocarbons <br /> b=Result is an estimated value because it exceeds the linear range <br /> c—Atypical chromatogram wdh unidentified peak(s)within the range of gasoline hydrocarbons Chlorinated hydrocarbons are suspected <br /> A groundwater sample collected from monitoring well M W6 on 4117192 contained chlorobenzene and 1 2-dichlorobenzene <br /> d=A typical chromatogram Analysis of this sample by EPA Method 624 on 4117192(past EPA recommended holding time)was positive for the <br /> following chlorinated hydrocarbons volylehloride,cis-1,2-dtchloroethene,trichloroethane and tetrachloroethane These peaks resulted to a positive <br /> tuel hydrocarbon result <br /> e—A typical chromatogram Four unknown peaks were observed causing a positive fuel hydrocarbon result Chlorinated hydrocarbons are suspected <br /> I =A typical chromatogram An unknown peak was observed between MTBE and benzene Chlorinated hydrocarbons are suspected <br /> g—A typical chromatogram Analysts of this sample by EPA Method 624 on April 17,1992(past EPA recommended holding time),was positive for the <br /> folloµtng chlorinated hydrocarbons chlorobenzene and 1,2-dtchtorobenzene <br /> It=MTBE by EPA Method 8260 <br /> g 1projects,73748\masterlwp`g0503�3748gu xls Page 18 of 19 <br />