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Table S <br /> Groundwater Monitoring Results-Oxygenate Analyses <br /> Del Monte Disco Property <br /> Stockton,California <br /> Concentration(uQ) <br /> EPA Di-isopropyl Ethyl-cert- tert-Amyl <br /> well Sample Date Method MTBE Dilution tent-Butanol ether I butylether Meth 1 ether <br /> Method 9260M <br /> VE SOUTH 04/17/1997 801518ozo M- L100 NA NA NA NA <br /> 6117197 8240 <5 1:1 NA NA NA NA <br /> 08/17/1997 9260M <100 1:20 NA <100 <100 <100 <br /> 04!1711998 8260M <40 1:4 NA <20 <20 <20 <br /> 05/21/1998 8260M NA NA EjaM, NA NA NA <br /> 07/23/1998 8260M <20 1:1 <20 <5 <5 <5 <br /> 11/11/1998 8260M <20 IA <200 <20 <20 <20 <br /> 02111/1999 8260M <5 1:1 <50 <5 <5 <5 <br /> 07/16/1999 8260M <5 1:10 <50 <5 <5 <5 <br /> 11/08/1999 8260M <5 1:20 <50 <5 <5 <5 <br /> 03/29/2000 8260B <5 1:1 <20 <5 <5 <5 <br /> 5151000 82608 <5 1:1 <20 <5 <5 <5 <br /> 06/28/2000 9260A <25 1:5 X25 <50 d5 <25 <br /> 11/16/2000 8260B <50 1:10 <50 <100 <50 <50 <br /> 03/27/2001 NA NA NA NA NA NA <br /> 10/17/2001 NA NA NA NA NA NA <br /> otes: <br /> 0.5: Below Detection limit of 0.5 ug/1 <br /> *: Sample collected by minimum aeration technique <br /> «: Not Confirmed by GUMS <br /> Samples collected on 6/12!97 were analyzed using EPA Method 8240. <br /> 13/19199 MW-DIS-2 re-sampled on this date and analyzed by EPA Method 8015/8020.Detection not confirmed by GC/MS. <br /> MTBE was not detected in the original 2/11199 sample(analyzed by EPA Method 8015/8020 and confirmed by <br /> GGMS Method 8260) <br /> A Not Analyzed <br /> S Not Sampled <br /> E <br /> U4 <br /> Gdatal"Uds Page 5 of 5 121052001 <br />