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Historical Groundwater Monitoring Data <br /> (9/27/99 through 6/30/05) <br />' DATE BTW 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 /> pg/L pg/L pg/L pg/L pg/l- mg/L pg/L <br /> t AnalyticalMethods- 8260Bt 8260Bt 8260Bt 8260Bt 826oBt 80ISM1• 8260B <br /> Monitoring Well& <br /> Elevation <br /> EW-I (36.23rra) 10/30/2003 Extraction Well EW-1 Installed <br />' 11126/2003 24.11 12.12 NA NA NA NA 230 NA NA <br /> 12/3112003 21.91 14.32 <0.5 <0.5 <0.5 <1.0 36 -0.05 <0,5-<5.o <br /> 3/4/2004 20.12 16,11 <0.5 -0.5 <0.5 <I.0 53 <0.05 <0.5-<5.0 <br /> 6/2412004 23.79 12.44 <0.5 <0.5 <0.5 <L0 <0.5 <0.05 <0,5-<5.0 <br />' 9/28/2004 2555 10.68 <0.5 <0.5 <0.5 <1.0 90 <0.05 <0.5-<5.0 <br /> 12/2912004 21.15 15.08 <0.5 <0.5 <0.5 <1.0 58 <0.05 <0.5-<5.0 <br /> 3/22/2005 18.07 18.16 <0.5 <0.5 <0.5 <1.0 150 <0.05 <0.5-<5.0 <br /> 6/3012005 19.17 1 17.06 1 <0.5 <0.5 <0.5 <L0 c0.5 <0.05 -0.5-15.0 <br />' 9/27199 through 9127101 Gmundwatcr Data Collected by Others. Analytical. <br /> DTW=Depth to water in feet below top ofcasing. B,T,E,X-bcazene,toluene,ethyl benzene,and total xylcnes. <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 teniary-butyl ether, <br />' la NAVD 88 datum. Oaygenams/additives includes ethanol(EtOM.tertiary-butanol(TBA), <br /> •�=Well collar elevation surveyed on November 5,2003,relative di-isopmpyl ether(DIPE).ethyl tertiary-butyl ether(ETRE),tertiary-amyl methyl <br /> to NAV D 88 datum. ether(TAME),1,2-dibromoetheme(EDB),and 1,2-dichloroelhane(1.2-DCA). <br /> Well purged dry. NA-not analyzed. <br /> ND-nal detected. <br /> NM=not measured. <br /> NS-not sampled. <br /> Unit Conversions' pg1L:micrograms per liter y parts per billion(ppb) t-BTEX constituents collected prior to 9126102 were analyzed by EPA Method 8021 B. <br /> mg1Lt milligrams per liter=pans per million(ppm) t=Samples collencd prior to 9126102 were analyzed for TPH-G by EPA Method 5030/Luft <br />' •=Samples collected post 12/27102 were analyzed for TPH-G by EPA Method 801513. <br /> 1 <br /> P:13M_prjA3761 Boyetl ManlecaN3761C Boyeti Manteca Groundwater MonEtoringlReporis(2QOS1Nisiodcal Data.xls <br />