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i <br /> Table 5 <br /> Groundwater Monitoring Results-Oxygenate Analyses <br /> Del Monte Disco Property <br /> Stockton,California <br /> i Concentration(W) <br /> { EPA Di-isopropyl Ethyl-Icrl- tcrt-Amyl <br /> well Sample Date Method MTBE Dilution tort-Butanol I butyl ether Methyl ether <br /> Method 8260M <br /> SVESOUTH 04/17/1997 8015/8020 ,24 1:100 NA NA NA NA <br /> 6112/97 8240 <5 1:1 NA NA NA NA <br /> 08/12/1997 8260M <100 1:20 NA <100 <100 <100 <br /> 04/17/1998 8260M <40 1:4 NA <20 <20 <20 <br /> ,� , ; ,,�r,,, <br /> 05/21/1998 8260M NA NA �;h;;;14Q ;x�; NA NA NA <br /> 07/23/1998 8260M <20 1:1 <20 <5 <5 <5 <br /> 11/11/1998 8260M <20 1:4 <200 <20 <20 <20 <br /> 02/11/1999 8260M <5 1:1 <50 <5 <5 <5 <br /> 07/16/1999 9260M <5 1:10 <50 <5 <5 <5 <br /> 11/08/1999 8200M <5 1:20 <50 <5 <5 <5 <br /> 03/29/2000 8260B <5 1:1 <20 <5 <5 <5 <br /> 5/51000 8260E <5 1:1 <20 <5 <5 <5 <br /> ! 06128!2000 8260A <25 1:5 <25 <50 <25 <25 <br /> 1 11/16/2000 8260B <50 l:f 0 <50 <100 <50 <50 <br /> 0312 212 00 1 NA NA NA NA NA NA <br /> Notes: <br /> <0.5: Below Detection limit of 0.5 ug/l <br /> Sample collected by minimum aeration technique <br /> **: Not Confirmed by GCIMS <br /> Samples collected on 6112/97 were analyzed using EPA Method 8240- <br /> `3119199 MW-DIS-2 re-sampled on this date and analyzed by EPA Melhod 801518020.Detection not confirmed by GCIMS. <br /> MTBE was not detected in the original 7J11/99 sample(analyzed by EPA Method 8015/8020 and confirmed by <br /> GCIMS Method 8260) <br /> I <br /> I <br /> 1 <br /> 1 <br /> I <br /> I <br /> I ` <br /> Gdata03-01_ko.xls Page 5 of 5 07/092001 <br /> i <br />