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ti rit■� : i w■r w■� w i_ w i 1• � i• � <br /> 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 Dissolved <br /> Monitoring Elevation Groundwater Elevation Benzene Toluene benzene Xylenes gasoline MTBE and Additives Lead <br /> Well Date (feet) (feet) (feet) (µg2) (ug/L) (µg/L) (µg/L) (AgIL) (ug/-) (ugll-) WIL) <br /> VEW3 02/26/01 NM 682 NC <0 5 <0 5 <0 5 <0 5 <50 2 1/<5h 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 /> i <br /> VEW3 03/12/02 o NM 725 NC 120 <10 <10 <10 16,600 30,300h 80 0711,050" 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 968 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 /> a=Total vol itile hydrocarbons <br /> b=Result is an estimated value bcKause it exceeds the linear range. <br /> L=A typical chroinatogram with unidentified peak(s)witluri the range of gasoline hydrocarbons Clilonnated hydrocarbons are suspected <br /> A groundwater sample collected from monitoring well MW6 on 4/17192 contained chlombenzene and 12 dichlorobenzene. <br /> d=A typicdl L1 ronatogrami Analysis of dus sdmplc by EPA Method 624 on 4117/92(past EPA recommended holding time)was positive for the <br /> following clilonnated hydrocarbons vinylchlonde cis 12 dichloroethiene,tnchlormthane and tetrachloroethane.These peaks resulted in a positive <br /> fuel hydrocarbon result <br /> e=A typical chromatogram Four urilnown perks were observed causing a positive fuel hydrocarbon result Clilonnated hydrocarbons are suspected <br /> f =A typical chromatogrann.An unknown peak was observed between MTBE and benzene, Chlorinated hydrocarbons are suspected <br /> g=A typical chronatogram Analysis of this sample by EPA Method 624 on Apnl 17 1992(past EPA recommended holding time) was positive for the <br /> following dilonnated hydrocarbons cldoroberizene and 1 2-drelilorobenzene <br /> h=MTBE by EPA Method 8260 <br /> i=Umdentificd hydrocarbon in Clic C6 C 12 range <br /> }= 12 Dicliloroetliane <br /> I=TPH as diesel <br /> I=Sample analyzed outside EPA recommended Bolding tante <br /> m=t Aiuyl trAlyl Wier <br /> g.1proleLis173708UiLL%irslwp1gl2O2L3708gw xis <br /> Page 18 of 19 <br />