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TABLE 3 <br /> Historical Groundwater Monitoring and Analytical Data <br /> Ranch Market <br /> 23569 South Santa Fe Road <br /> Riverbank,Califomia <br /> Well NoJ Ethyl- EPA method 8260 B <br /> Eleraaon Date Benzene Toluene benzene Xylenes TPH-G MTBE TBA DIPE ETBA TAME 1,2-DCA EDB DTW" SPT WTE <br /> OC)' ( /L) ( (p ). . (R /L) (4 R-) OWL) .. ( IL) (P R-) (P R-) ( /L) (Ft /L) ( /L) (ft) (ft) (ft) <br /> W4 10/07/99 - - - -- a <1.0 <10 <I.0 <1.0 <I.0 - -- -- - <br /> - 12/25/99 <0.3 <0.3 <0.3 <0.3 <50 a <5 <20 <5 c5 <5 <5 c5 -- -- -- <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 /> 04/11/01 <0.50 c0.50 <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 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-len-butyl ether <br /> µg/L=Micrograms per liter TBA=tert-Butanol <br /> -=Not sampled/nm analyzed/not measured DIPE=Diisopropyl Ether <br /> DTW=Depth to water ETBE=Ethyl-tert-butyl Ether <br /> SPT=Separate-phase thickness TAME=ten-Amyl-Methyl Ether <br /> WTE=Water table elevation 1,2-DCA=1,2-Dichlomethane <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/Nitrite using EPA method 300.0. DW-1(08/11/00)Nitrate as NO3=78,800 ug/L and Nitrate 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(01/08/01)Nitrate as NO3=1,000 ug/L and Nitrate as nitrogen=<400 ug/L. <br /> • <br /> File:Project\Riverbank\Tables\RB-01-2Q-GW-1 Page 5 of 5 5/10/01 <br />