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TA <br /> Ihstorlcal Groundwater Moniitonng and Analytical Data <br /> Ranch Market <br /> 23569 South Santa Fe Road <br /> Riverbank,California <br /> Well NuJ Ethyl. I I EPA mediod 8260 B <br /> ElevationDate Renn" Tolneue, beanie Xylenes TPH G Wng I TBA RIPE En I TAME 1,2-DCA I EDB DTW** SPT WTE <br /> QC3* ) U94.) Qk ) (991L) (AIL) (4&) (#t ( ) (A ) (u )L) ( /L) (;L /L) (ft) (ft) (ft) <br /> DW-4 10/07/99 — — — a <I0 <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 54 <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 /> 04/11/01 <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 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 54 — — — <br /> 10/01/01 <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 /> 01/03/02 <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 /> 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 /> 07/12/02 <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 /> Explanation <br /> TOC*=Top of Casing elevation to 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 /> µg/L=Micrograms per liter TBA=tert-Butanol <br /> --=Not sampled/not analyzed/not measured D1PE=Dusopropyl Ether <br /> DTW=Depth to water ETBE=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 TPEg 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 Nitrate as nitrogen=<400 ug/L <br /> DW-2(09/21100)Nitrate as NO3=60,200 uglL and Nitrate as nitrogen=13,600 ug/L <br /> DW-2R(01/08101)Nitrate as NO3=1,000 ug/L and Nitrate as nitrogen=<400 ug/L <br /> f=Matrix Spike/Matnx Spike Duplicate Results associated with samples MW-1 through MW-4,MW-7 &DW-3 for the analyte TBA were affected by the analyte concentrations already present in the unspiked sample <br /> I <br /> Ranch Market-RrverbanklTablesl RB-02-3Q-GW-1 Page 7 of 7 <br />