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i <br /> Table 5 <br /> Groundwater Monitoring Results-Oxygenate Analyses <br /> Del Monte Disco Property <br /> Stockton,California <br /> Concentration(BO) <br /> EPA Di-isopropyl Ethyl-cert- tert-Amyl <br /> Well Sample Date Method MTBE Dilution tert-Butanol ether butyl ether I Methyl ether <br /> Method 8260M <br /> NP-1-70' 04/17/1997 80151902D 1:1000 NA NA NA NA <br /> 6112197 8240 <5 1:1 <20 <5 <5 <5 <br /> 12/23/1997 8260M <5.0 1:1 <5 <5 <5 <br /> 04/I7/1998 8260M 120 1:2 NA <10 <10 <10 <br /> 05/21/1998 8260M NA NA 120 NA NA NA <br /> j 08/07/1998 8260M <20 1:1 <20 <5 <5 <5 <br /> 11/11/1998 8260M <20 1:4 1200 <20 120 QO <br /> 02/11/1999 8260M <5 0 <50 <5 <5 <5 <br /> 07/1611999 8260M <5 1:1 <50 <5 <5 <5 <br /> 11/08/1999 8260M <5 1:1 <50 <5 <5 <5 <br /> 03/29/2000 8260B <5 1:1 d0 <5 <5 <5 <br /> 5151000 8260B <5 1:1 120 <5 <5 <5 <br /> 06/28/2000 8260A 1 Q5 1:5 125 <50 X25 <25 <br /> �I <br /> NP-2-65' 04/17/1997 9015/8420 <10 1:10 NA NA NA NA <br /> 6/12197 8240 <5 1:1 NA NA NA NA <br /> SVE- <br /> NORTH 04/1711997 Bo1smw <5 1:1 NA NA NA NA <br /> 12/23/1997 8260M <5 1:1 Is= <5 <5 <5 <br /> 04/17/1998 8260M <10 1:1 NA <5 <5 <5 <br /> 05/21/1998 8260M NA NA <20 NA NA NA <br /> 07/23/1998 8260M QO 1:1 QO <5 <5 <5 <br /> 11/11/1998 8260M <5 1:1 <50 <5 <5 <5 <br /> 02/11/1999 8260M <5 1:1 <50 <5 <5 <5 <br /> 07/16/1999 8260M <5 1:1 <50 <5 <5 <5 <br /> 11/08/1999 8260M <5 1:1 <50 <5 <5 <5 <br /> 03/29/2000 8260B <5 Ll <20 <5 <5 <5 <br /> j, 06ng/2000 8260A <5 1:1 tIFF <10 <5 <5 <br /> SVE- <br /> SOUTH 04/17/1997 9015/9020 = 1:100 NA NA NA NA <br /> 6112/97 8240 <5 IA NA NA NA NA <br /> 08/12/1997 8260M <100 1:20 NA <100 <100 <100 <br /> 04/17/1996 8260M <40 1:4 NA <20 <20 <20 <br /> 05/21/1998 8260M NA NA IMFIM NA NA NA <br /> { 07/23/1998 8260M 120 1:1 dA <5 <5 <5 <br /> i 11/11/1998 8260M 120 1:4 <200 <20 <20 <20 <br /> 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 I:20 <50 <5 <5 <5 <br /> 03/2912000 8260B <5 1:1 120 <5 <5 <5 <br /> 515/000 8260B <5 1:1 120 <5 <5 <5 <br /> 06/28/2000 1 9260A 1 <25 1:5 125 <50 125 <25 <br /> Notes: <br /> <0.5: Below Detection limit of 0.5 ugll <br /> *: Sample collected by minimum aeration technique <br /> **: Not Confirmed by OCIMS <br /> 1Samples collected on 6/12/97 were analyzed using EPA Method 8240. <br /> X3/19/99 MW-DIS-2 re-sampled on this date and analyzed by EPA Method 801518020.Detection not confirmed by CC/M5. <br /> MTBE was not detected in the original 2111/99 sample(analyzed by EPA Method 8015/8020 and confirmed by <br /> CC/MS Method 8260) <br /> If <br /> 1 <br /> Gdata6-00.%Is Pct®e 4 of 4 11101120M <br /> j <br />