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. Historical Groundwater Monitoring Data <br /> (9127199 through 6127106) <br /> DATE DTW ELEV B T E X MTBE TPH-G OXYGENATESIADDIT3VES <br /> DereetionLimio-F 0.5 0.5 0.5 1.0 05 0.05 0.5-5.0 <br /> VS/L lis/L Pgn- 118n- Flg1L mglL Ps/L <br /> Analytical Methods-r 826013t 8260Bt 8260Bt 9260Bt 8260Bt 9015Mj- 8260B <br /> Monitoring W 1& <br /> V - <br /> EW-1 (36.23*#) 10!3012003 Extraction Well EW-1 Installed <br /> 11/2612003 24.11 12.12 NA NA NA NA 230 NA NA <br /> 12131!2003 21.91 14.32 <0.5 <0,5 <0.5 <1.0 36 <0,05 <0.5-<5.0 <br /> 31412004 20.12 16.11 <0,5 <br /> <0.5 <0.5 <1.0 53 <0 05 <0.5-<5.0 <br /> 6/2412004 23.79 12.44 <0,5 <QS <0.5 <1.0 <0.5 <0,05 <0.5-<5.0 <br /> 9/2812004 25.55 10.68 <0,5 <0 5 <0.5 <1.0 90 <0 05 <0.5-<5.0 <br /> 12129!2004 2135 5 15.08 <0.5 <0.5 <0.5 <1.0 58 <0.05 <0 5-<5.0 <br /> 3h2l2005 18.07 18.16 c0.5 1 x0.5 <br /> <0,5 <1.0 150 1 <0.05 <0.5-<5.0 <br /> 613012005 19.17 17.06 <0.5 <br /> <0.5 <0.5 <1.0 <O.S <0.05 <0.5-6.0 <br /> 9/1012005 19.84 16.39 <0.5 10.5 <0.5 <1,0 <0.5 <0.05 <0.5-<5.0 <br /> 1212812005 18.01 18.22 <0 5 <0.5 <0.5 <1.0 25 <Q05 <0.5-<5.0 <br /> 3!2772006 15.76 20.47 <0.5 <0.5 <0.5 <1.0 23 <0.05 <0.5-6.0 <br /> 6f2772006 15.38 20.85 Q.5 <0.5 <0.5 <1.0 4.7 <0.65 <0.5-<5.0 <br /> 9127199 through 9127/01 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, Oxygenatesladditives include:ethanol(EtOH),tertiary-butanol(TBA), <br /> N-Well collar elevation surveyed on November 5,2003,relative di-isopropyl ether(D1PE),ethyl tertiary-butyl ether(ETRE),tertiary-amyl methyl <br /> to NAVD 88 datum_ ether(TAME),1,2-dibromoethane(EDB),and 1,2•dichloroethane(1,2-DCA). <br /> '- <br /> Wel 1 purged dry. NA=not analyzed. <br /> ND-not detected, <br /> NM-not measured. <br /> NS=not sampled. <br /> Unit Conversions: PSIL:micrograms per liter-parts per billion(ppb) t-BTEX constituents collected prior to 9126102 were analyzed by EPA Method 8021 B <br /> mgiU milligrams per liter-parts per million(ppm) �-Samples collected prior to 9126102 were analyzed for TPH-G by EPA Method 5030/Lutl <br /> •-Samples collected post 12/27102 were analyzed for TPH-G by EPA Method 8015B. <br /> P:13000_prj13761 Boyett MantecaQ761 D Boyett Manteca GW Investigation and MonitoringlRsports520061Historical Data <br />