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Groundwater Monitoring and Analytical Data Ranch Market 23569 South Santa FB Road Riverbank,California Welt NoJ Ethyl EPA method 8260 B Elevation Date Benzene Toluene benzene Xylenes TPH G MTBE TBA DtPE ETRE TAME 1,2-DCA EDB DTW" SPT WTE OC' p ( L) pg1L R ft ft D Wit ConlL 0 V05105 <0 50 <0 50 <0 50 <1 0 <50 b <0 50 <14 <0 50 <D 50 <0 50 <0 50 <0 50 — — — 04117G105 <0 50 <0 50 <0 50 <1 5 <50 b <0 50 <1 D <0 50 <0 50 <0 50 <0 54 <0 54 — — — 07f13l05 No sample We 11 not accessable — — — Explanation TOC =Top of Casing elevation in feet above mean sea level TPH G=Total petroleum hydrocarbonsas-gasoline =Free floating product present No groundwater sample was catlected MTBE=Methyl-tert butyl ether ^'=Feet below top of Casing measured from the northerly side TBA=tort Butanol pg/L=Micrograms per Liter DIPE=Diisopropyl Ether —=Not sampledlnot analyzed/not measured ETBE=Ethyl tart butyl Ether OTW=Depth to water TAME=ten Amyl-Methyr Ether SPT=Separate-phase thickness 12 DCA=12 Dichloroethane WTE=Water table elevation EDB=12 Dibromoethane a=analyzed for TPH9 and BTEX using EPA methods 8WO18015 b=analyzed for BTEX&Oxygenates using EPA method 82608 c=Grab water sample collected d=Well resampled to confirm presence of toluene reported in first water sample collected after well installation e=Analyzed for Nitrate/Nitrite using EPA method 300 D DW 1(08111 f00)Nitrate as NO3=78 800 ug&and Nitrate as nitrogen=<400 ug/L DW 2(09/21100)Nitrate as NO3=60 2D0 ug/L and Nitrate as nitrogen=13 600 ug/L DW 2R(01108/01)Nitrate as NO3=1 000 ug/L and Nitrate as nitrogen=<400 ugrL f=Matrix Spika/Matnx Spike Duplicate Results associated with samples MW 1 through MW4 MW 7 &DW 3 for the analyte TBA were affected by the analyle concentrations already resent in the uns Iked sample S9643-06-01 30-05 Rpt GW data As 1 GW Hydro&Depth 10 Of 10 9/28/2005