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TAB <br /> Historical Groundwater Monitoring and Analytical Data <br /> Ranch Market <br /> 23569 South Santa Fe Road <br /> Riverbank,California <br /> Well F1oJ EPA 8020 _ EPA method 8260 B <br /> e NUR, tiTBA DIS MA TAME 1,2-DCA EDB DTW* SPT WTE <br /> )" ) ) } ) ) ) (ft) (f;) (0) <br /> W13 10/07/99 -- -- — — a — <10 <10 <10 <10 <10 10736 12125M <0 3 <03 <0 3 43 <50 a — <5 a0 <5 <5 <5 <5 <5 <br /> 04/AU) <0 50 <0 50 <0.50 <OM <50 b -- <0 50 <5 0 <0 50 <0 50 <0 50 <0 50 <0 50 - — <br /> 08116/M <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 /> 11/16400 <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 /> W-4 10/07/99 -- — -- a -- <10 <10 <10 <I0 <10 -- <br /> 12125/W <0 3 <03 43 <0 3 <50 a <5 <20 <5 <5 <5 <5 <5 <br /> 04106/00 <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 /> 0W16f00 <0 50 <0 50 <0 50 <0 50 <50 b -- 4 50 <5 0 <0 50 <0 50 <0 50 <0 50 <0 5o — <br /> 11/16/00 <0 50 <0 50 <0 50 <0 50 <50 b <0 50 <5 0 1 1 450 <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 tert butyl ether <br /> µg/L=Micrograms per liter TBA=tert Butanol <br /> - =Not sampled/not analyzed/not measured DIPE=Di-isopropyl Ether <br /> DTW=Depth to water ETBE=Ethyl-tent-butyl Ether <br /> SPT=Separate phase thickness TAME=tert-Amytmethyl Ether <br /> WTE=Water table elevation 12 DCA=1,2 Dichloroethane <br /> a=analyzed for TPHg,BTEX EPA methods 8OMM15 EDB=1 2-Dibromoethane <br /> b=analyzed for Mg,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 batted through rods <br /> e=depth below grade,discrete water sample collected using Maxi-Simulpmbe attached to drive rod <br /> f=depth discrete grab sample prior to well installation <br /> =Well resam led to confirm presence of BTEX TPH ,and MtBE reportig in first water sample collected after well installation <br /> h <br /> I <br /> File ProleetlRrverbanklTablesl RB-00-4Q-GW I Page 3 of 3 12/6/00 <br />