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TABS <br /> Histoncal Groundwater Mo®tonng and Analytical Data <br /> Ranch Market <br /> 23569 South Santa Fe Road <br /> Riverbank California <br /> Wa Nwi Ethyl. EPA method 8260 B <br /> Etevatlea Date Benzene Toluene benzene Xytenes TPH-G MM TRA �7IPE ETBt1 TAME 1,7,DCA IDB DTW** SPT ME <br /> tel* ( ) t ) £ ( l € 7 { ) { ) OWL) (u ) {fs rl) (ft) (ft) Of) <br /> W4 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 /> 04/t 1101 <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 11 <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 <50b <0 50 <5 0 <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 <5 0 <0 50 <0 50 <0 54 <0 50 <0 50 — — <br /> 04/05/02 <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 /> EEix lanation <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 tert-butyl ether <br /> Iig/L=Micrograms per liter TBA=tert-Butanol <br /> --=Not sampled/not analyzed/not measured DIPE Dusopropyl Ether <br /> DTW=Depth to water ETRE=Ethyl-tert-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 8260E <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/Nitrite using EPA method 300 0 DW-1(08/11100)Nitrate as NO3=78,800 ug/1.,and Nitrate as nitrogen=<400 ugIL <br /> DW-2(09/21/00)Nitrate as NO3=60,200 ug/L and Nitrate as nitrogen=13,600 ug/L <br /> DW-211(01108/01)Nitrate as NO3=1,404 ug/L and Nitrate as nitrogen=<400 ug/L <br /> f=Matnx Spike/Matnx Spike Duplicate Results associated with samples MW-I through MW-4 MW-7,&DW-3 for the analyte TBA were affected by the analyte concentrations already present in the unspiked sample <br /> 1 <br /> File ProlectlRrverbanklTablesl RB-02-2Q-GW-1 Page 7 of 7 6/14102 <br />