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' Historical Groundwater Monitoring Data <br /> i (9127199 through 6124104) <br /> tDATE DTW ELEV B T E X MTBE TPH-G OXYGENATES/ADDITIVES <br /> Detection Limits-) 0.5 0.5 0.5 1.0 0.5 0.05 0.5-5.0 <br /> P91L ug/L Ng/L Ng/L NS11- mg/L Ng/L <br /> Analytical Methods-► 8260Bt 826013t 826013t 8260Bt 8260Bt 8015Mt• 82608 <br /> 1 Monitoring Well& <br /> Elevation <br /> MW-10 (36.0944) 10/30/2003 Monitoring Well MW40 Installed <br /> 11/2612003 24.21 11.88 NA NA NA NA €50 NA NA <br /> 12/31/2003 22.14 13.95 <0.5 <0.5 <0,5 <1.0 230 <0.05 TAME-0.6 <br /> 314!2004 20.92 15.17 <0,5 <0.5 <0.5 <1.0 660 <0.05 TAME-1.3 <br /> 6/24/2004 21.55 14.54 <0,5 <0.5 <0.5 <1.0 8.3 <0.05 <0.5-<5.0 <br /> MW-11 (36.15++) 10130/2003 Monitoring Well MW-II Installed <br /> 11/26/2003 23.98 12,17 NA NA NA NA 1,000 NA NA <br /> 1213112003 21.81 14.34 <0,5 <0.5 '<0.5 <1.0 520 <0.05 TAME-1.1 <br /> 3/4/2004 20.02 16.13 <0.5 <0.5 <0.5 <1.0 130 <0.05 <0.5-<5.0 <br /> 61242004 23.67 12.48 <0.5 <0.5 <0.5 <1.0 66 <0.05 <0.5-<5,0 <br /> EW-1 (36.23+4) 10/3012003 Extraction Well EW-1 Installed <br /> 11/26/2003 24.11 12.12 NA NA NA NA 230 NA NA <br /> 12/31/2003 21,91 14.32 <0.5 <0.5 <0.5 <1.0 36 <0.05 <0.5-<5.0 <br /> 3/4/2004 20.12 16,11 <0.5 <0.5 <0.5 <1,0 53 <0.05 <0.5-<5.0 <br /> 6!24/2004 23.79 12.44 <0,5 <0.5 <0.5 <1.0 <0.5 <0.05 <0.5-<5,0 <br /> 09/27/99 through 9/27/01 Groundwater Data Collected by Others. Analytical: <br /> DTW=Depth to water in feet below top of casing, B,T,E,X=benzene,toluene,ethyl benzene,and total xylenes. <br /> ELEV=Groundwater elevation in feet above mean sea level. TPH-G=total petroleum hydrocarbons,quantified as gasoline, <br /> ♦=Well collar elevation resurveyed on September 30,2002,relative MTBE=methyl tertiary-butyl ether. <br /> to NAVD 88 datum. Oxygenates/additives include:ethanol(EtOH),tertiary-butanol(TBA), <br /> ♦*=Well collar elevation surveyed on November 5,2003,relative di-isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETB£),tertiary-amyl methyl <br /> to NAVD 88 datum. ether(TAME),1,2-dibromoetltane(EDB),and 1,2-dichloroethane(1,2-DCA). <br /> "=Well purged dry. NA=not analyzed. <br /> ND=not detected. <br /> NM-not measured. <br /> NS=not sampled. <br /> Unit Conversions: pg/L:micrograms per liter=parts per billion(ppb) t=BTEX constituents collected prior to 9126102 were analyzed by EPA Method 8021B. <br /> mg/L:milligrams per liter-parts per million(ppm) t=Samples collected prior to 9126102 were analyzed for TPH-G by EPA Method 5030/Luft <br /> •=Samples collected post€2/27102 were analyzeii for TPH-G by EPA Method 801513, <br /> P:13000_prj13761 Boyett Manteca13761A Boyett Work Plans SRS ReportlReportslQMR12Q0413761 Hist G.W.Data 2004 <br />