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I <br /> TABLE 3 <br /> Historical Groundwater Monitoring and Analytical Data <br /> Ranch Market <br /> 235$9 South Santa Fe Road <br /> Riverbank California <br /> Well NoJ Ethyl- EPA method 8260 B <br /> Elevation Date Benzene Toluene benzene Xylenes TRH-G MTBE TBA DIPE ETBA TAME 1,2-DCA EDB DTVr- SPT WTE <br /> Oc)• (p ) L) (N (vullAt (pg/Q (p IL) WWL) (ug/L) (ug/L) (u L) (h) 8) (8 <br /> DWA 10/07/99 - - - a <10 <10 <10 <10 <10 <br /> 12/25/99 <0 3 <0 3 <0 3 <0 3 <50 a <5 <20 <5 <5 <5 <5 <5 <br /> 04/06/00 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 08/16/00 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 11/16/00 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 01/03/01 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 04111/01 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 07/03/01 <0 50 <0 50 <0 50 <0 50 <50 b 1 1 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 08/01/01 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 - - <br /> 10/01/01 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 01/03/02 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 04/05/02 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 07112!02 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 10/01/02 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> 01/10/03 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <br /> Explanation <br /> TOC*=Top of Casing elevation in feet above mean sea level TPH G=Total petroleum hydrocarbons as-gasoline <br /> *=Feet below top of casing measured from the northerly side MTBE=Methyl-cert-butyl ether <br /> pg1L=Micrograms per liter TBA=tert-Butanol <br /> =Not sampled/not analyzedlnol measured DIPE=Dusopropyl Ether <br /> DTW Depth to water ETRE=Ethyl4ert-butyl Ether <br /> SPT=Separate-phase thickness TAME=tert Amyl-Methyl Ether <br /> WTE=Water table elevation 1,2-DCA=1,2 Dichloroethane <br /> a=analyzed for TPHg and BTEX using EPA methods 8020/8015 EDB=1,2-Dibromoethane <br /> b=analyzed for TPHg,BTEX,&Oxygenates using EPA method 8260B <br /> c=Grab water sample collected <br /> d=Well resampled to confirm presence of toluene reported in first water sample collected after well installation <br /> e=Analyzed for Nitrate/Nitnte using EPA method 300 0 DW-1 (08111!00)Nitrate as NO3=78,800 ug/L and Ndrate as nitrogen=<400 ug/L <br /> DW-2(09/21/00)Nitrate as NO3=60,200 ug/L and Nitrate as nitrogen=13,600 ug/L <br /> DW-2R(01108101)Nitrate as NO3=1,000 ug/L and Nitrate as nitrogen=<400 ug/L <br /> I=Matrix Spike/Matnx Spike Duplicate Results associated with samples MW 1 through MW 4,MW-7,&DW 3 for the analyte TBA <br /> were affected by the analyto concentrations already present in the uns eked sample <br /> Ranch Market Rrverbank%Tablesl RB 03-1Q-GW-1 As Page 9 of 9 <br />