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TA*3 <br /> Hlstoncal Groundwater Monitoring and Analytical Data <br /> Ranch Market <br /> 23569 South Santa Fe Road <br /> Riverbank,California <br /> Well NodEthyl- EPA method 8260 B <br /> Elevation Date Benzene Toluene benzene Xylenes TPH-G MTBE TBA DIPE ETBA TAME 1,2 DCA EDB DTW** SPT WTE <br /> (TOC)* ( ) (ti ) ( 1-) {lt ) {!< ) {lt /L) (!1 R) (!1 �) (ll ) (!l /L) (R 1L) {li A) {ft) (ft) (ft} <br /> W 4 10/07/99 -- a <l 0 <l0 <1 0 <1 0 <1 0 <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 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 <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 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 treasured from the northerly side MTBE=Methyl-cert butyl ether <br /> lig/L=Micrograms per liter TBA=tert-Butanol <br /> =Not sampled/not analyzed/not measured DIPE=Dnsopropyl 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 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/Nitnte using EPA method 300 0 DW-1(08111/00)Nitrate as NO3=78,800 uVL and Nitrate as nitrogen=<400 ug/L <br /> DW-2(09121/00)Nitrate as NO3=60,200 ug/L.and Nitrate as nitrogen=13 600 ug/L <br /> DW 2R(01/08101)Nitrate as NO3=1,000 ug!!,and Nitrate as nitrogen=<400 ug/L <br /> File ProjectlRiverbanklTablesl RB-01-3Q-GW-1 Page 5 of 5 8/9/01 <br />