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i <br /> Table 5 <br /> Groundwater Monitoring Results-Oxygenate Analyses <br /> Del Monte Disco Property <br /> Stockton,California <br /> i <br /> I Concentration(uo) <br /> EPA Di-isopropyl Ethyl-cert- tert-Amyl <br /> Well Sample Date Method MTBE Dilution tert-Butanol ether butyl ether Methyl ether <br /> } Method 8260M <br /> 1 SVE-SOU 04/17/1997 8015/8020 1:100 NA NA NA NA <br /> 6112197 8240 <5 I:1 NA NA NA NA <br /> 08/1211997 8260M <100 1:20 NA <100 <100 <100 <br /> 04/17/1998 8260M <40 1:4 NA <20 <20 <20 <br /> 05/21/1998 8260M NA NA MFJMM NA NA NA <br /> 07/2311998 8260M <20 1:1 X20 <5 <5 <5 <br /> i' 11/11/1998 8260M <20 1:4 <200 <20 QA QO <br /> l 02/11/1999 9260M <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 /> i 03/29!2000 6260B <5 1:1 <20 <5 <5 <5 <br /> 515/000 8200B <5 1:1 <20 <5 <5 <5 <br /> 06/28/2000 8260A <25 I:5 <25 <50 <25 <25 <br /> 11/16/2000 8260B <50 1:10 b0 _:<l 00 <50 <50 <br /> Notes: <br /> <0.5: Below Detection limit of 0.5 ugll <br /> Sample collected by minimum aeration technique <br /> **: Not Confirmed by GUMS <br /> Samples collected on 6112197 were analyzed using EPA Method 8240. <br /> 13/19199 MW-DIS-2 re-sampled on this dace and analyzed by EPA Method 8015/8020.Detection not confirmed by GUMS. <br /> MTBE was not detected in the original 2111199 sample(analyzed by EPA Method 801518020 and confirmed by <br /> GGMS Method 8260) <br /> i <br /> f <br /> I <br /> 1 <br /> Ii <br /> I <br /> j <br /> ,E. <br /> j <br /> Gdaio l 1{10_ko.xrs Page 5 of 5 02/07/2001 <br /> l <br />