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MM M MM MMM r Im MMM M M Mir r TABLE 1 Groundwater Monitoring and Analytical Data Ranch Market 23569 South Santa Fe Road Riverbank California Weil Noi Ethyl EPA method 8260 B Elevation Date LIBeizene Toluene benzene Xylenes TPH-O MTBE TBA DIPE ETBE TAME 12 ACA EDB DTW* SPT WTE TOC L L L L L L 1 L L L 11 N it DW 3 Cont. 01/10/03 — — 04101/03 -050 <0 50 <0 50 <0 50 <50 b <0 50 <20 <0 50 <0 50 <0 50 <0 50 <0 50 — — 07102/03 — — — — — 10l02103 <0 50 -050 <0 50 <0 50 <50 a <0 50 <100 <0 50 <0 50 <0 50 — — Oi109704 <0 50 <0 50 <o 50 <0 50 -50 b .050 <20 <0 50 <0 50 <0 50 4 50 <0 50 04108/04 <0 50 4 50 <0 50 <1 0 <50 b <0 50 <20 <050 <0 50 <0 50 <0 50 <0 50 — DW-4 10107/99 — a <10 <10 <10 <10 <10 — — 12125/99 <0 3 <0 3 <03 <03 <50 a <5 <20 <5 <5 <5 <5 <5 -- — 04106/00 <050 -050 <050 <050 <50 b <0 50 <5 0 <0 50 <0 50 <050 <0 50 <0 50 _ -- 08116l00 <0 50 <0 50 <050 <050 <50 b <0 50 <50 <0 50 <0 50 <0 50 <0 50 <050 — — 111116/00 4 50 <0 Be <0 50 4 50 <50 b <0 50 <5 0 <0 50 <0 50 <O 50 <0 50 <050 — 01103161 <0 50 <0 50 <0 50 <0 50 <50 b 4 50 <5 0 <0 50 <0 50 <0 50 <0 50 <050 _ 0411101 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <5 0 <060 <0 50 <0 50 <0 50 <0 50 — — 07I03101 <0 50 <0 50 <0 50 <0 50 <50 b 1 1 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 — 08/01101 <0 50 <0 50 <0 50 4 50 <50 b <0 50 — 10l01101 <0 50 <0 50 <050 <050 <50 b <0 50 <50 <050 4 50 <050 <050 <0 50 01/03102 <0 50 <0 50 <0 50 <O 50 <50 b -050 <50 <0 50 <0 50 -060 <0 50 <0 50 — 04/05102 <0 50 <050 <0 50 <0 50 <50 b <0 50 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 — 07/12102 <0 50 <0 50 -050 <0 50 <50 b <0 50 <5 0 <0 50 <0 50 <0 50 <0 50 <O 50 _ 10/01/024 50 <0 50 450 <0 50 <50 b <0 50 <5 0 <0 50 <0 50 <05 <0 50 <0 50 01/10/03 <0 50 <0 50 -050 <0 50 <50 b <0 50 <5 0 <050 <0 50 <0 50 <050 <0 50 04/01103 4 50 <0 50 <0 50 -050 <50 b <0 50 <20 <D50 0 50 <0 50 '050 -050 07/02/03 <0 50 <0 50 <0 50 450 <50 b <0 50 <0 50 <050 <0 50 4 50 <0 50 <050 — 110/02/03 No sample Wel not accossable 01/09/04 No samF11e Well not accessible — 04/08104 <0 501 <0 501 <0 50 <1 0 <50 bi <0 5ol <201 <OBOI <0 50 <0 50 <0 501 <0 501 -- Exolanahon TOC =Top of Casing elevation in feet above mean sea level TPH G=Total petroleum hydrocarbons as-gasoline =Free floating product present No groundwater sample was collected MTBE=Methyl tent butyl ether =Feel below top of casing measured irom the northerly side TBA=ter!Butanol pglL=Micrograms per Suer DIPE=Dusopropyl Ether =Not sampled not analyzed/not measured ETBE=Ethyl ten butyl Ether DTW=Depth to water TAME=tert Amyl Methyl Ether SPT=Separate phase thickness 1 2 DCA=1 2 Dichloroethane WTI=Water table elevation EDB=12 Dibromoethane a=analyzed for TPHg and BTEX using EPA methods 802018015 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/Nitnte using EPA method 300 0 DW 1(0811 1100)Nitrate as NO3=7B 800 ug1L and Nitrate as nitrogen=<400 uglL DW 2(09!21100)Nitrate as NO3=60 200 ug1L and Nitrate as nitrogen=13 600 U911— DW 2R(01/08/01)Nitrate as NO3=1 000 ug1L and Nitrate as nitrogen=<400 ug1L f=Matrix SpikelMatnx Spike Duplicate Results associated with samples MW 1 through MW4 MW 7&DW 3 for the analyte TBA were affected by the analyte concentrations already present in the unS eked sample GW data 20 04 xis t GW Hydro&Depth 8 of 8 4IM200400