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TA B03 • <br /> Historical Groundwater Monitoring and Analytical Data <br /> Ranch Market <br /> 23569 South Santa Fe Road <br /> Riverbank,California <br /> Well Nol �� � t1iy1- _ EPA8020 EPA method 8260 B <br /> Elevation Dates u MTBE MTBE TBA DIPE ETBA TAME 1,2'DCA EDB DTW** SPT W17E <br /> (TOC)* (A ? ) cug/L) (It ) (u�) (ja (U } ULZII (uP�) (l�S�-} (0} (ft) (ft) <br /> DW-4 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 /> 04l06/00 <0 50 <0 50 <0 50 <0 50 <50 b -- <0 50 <50 <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 />' 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 trom the northerly side MTBE=Methyl-tert-butyl ether <br /> µg1L=Micrograms per liter TBA=cert-Butanol <br /> -=Not sampled/not analyzed/not measured DIPE=Di-isopropyl Ether <br /> DTW=Depth to water ETBE=Ethyl-tert-butyl Ether <br /> SPT=Separate-phase thickness TAME=tert-Amylmethyl Ether <br /> WTE=Water table elevation 1,2-DCA=1,2-Dichloroethane <br /> a=analyzed for TPHg,BTEX EPA methods 8020/815 EDB=1,2-Dibromoethane <br /> b=analyzed for TPHg,BTEX,&Oxygenates using EPA method 8260B <br /> c=No purge water sample bailed from well <br /> d=depth below grade,discrete water sample collected,hydropunch attached to drive rod,sample bailed through rods <br /> e=depth below grade,discrete water sample collected use Maxi-Simutprobe attached to drive rod <br /> t=depth discrete grab sample prior to well instalation <br /> I <br /> I <br /> I <br /> File ProjectlRiverbanklTablesl RB-FLstoricalGW-1 Page 3 of 3 9/5/00 <br />