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a" Herman&Helen's Marina-A-rter,2000, Groundwater Monitoring <br /> April 20,2000 <br /> Page-8- <br /> 0 <br /> CS ; <br /> 5 <br /> Current and Historica Water onitoring Data <br /> B I T E X TPH-G Gasoline Oxygenates/Additives <br /> Detection DATE 0.3 0.3 0.3 0.6 0.051.0- 10 <br /> limits: µg/1 µg/1 µg/1 µg/l <br /> mg <br /> I µg/1 <br /> Sample I.D. <br /> DDN 10/1/98 ND 2.3 ND ND ND 16(MTBE) <br /> DDS 10/1/98 ND ND ND ND ND 4.7(MTBE) <br /> IDCE 10/1/98 ND ND ND ND ND 1.2(MTBE) <br /> IDCW 10/1/98 ND ND ND ND ND ND <br /> MDDN12/30/98 ND NDND ND ND 1.4(MTBE) <br /> 12/30/98 ND ND ND ND ND 1.0(MTBE) <br /> 12/30/98 ND ND ND ND ND ND <br /> 12/30/98 ND ND ND ND ND ND <br /> DDN 3/26/99 ND ND ND ND ND 980(MTBE) 9.8(TAME) <br /> DDS 3/26/ ND 83 ND ND ND* 3,500 (MTBE) 28 (TAME) L— <br /> I <br /> IDCE 3/26/99 ND ND ND ND ND ND <br /> IDCW 3/26/99 ND ND ND ND ND 2.2 (MTBE) <br /> [E6/30/99 <br /> 6/30/99 ND ND ND ND ND 5.4(MTBE) <br /> 6/30/99 ND ND ND ND ND 1.8(MTBE) <br /> 6/30/99 ND ND ND ND ND ND <br /> ND ND ND ND ND 1.4(MTBE) <br /> DDN 9/23/99 0.6 ND ND 0.9 ND 1.7(MTBE) <br /> DDS 9/23/99 ND ND ND ND ND ND <br /> IDCE 9/23/99 ND ND ND ND ND ND <br /> IDCW 9/23/99 ND ND ND ND ND 1.6 (MTBE) <br /> DDN 12/22/99 ND ND ND ND ND 2.7(MTBE) <br /> DDS 12/22/99 ND ND ND ND ND 1.5 (MTBE) <br /> IDCE 12/22/99 ND ND ND ND ND ND <br /> IDCW 12/22/99 ND ' ND ND ND ND ND <br /> DDN 3/1' 4ND0.37 <br /> ND ND ND 19(MTBE) <br /> DDS 3/17/0 ND ND ND 4,700(MTBE) <br /> IDCE 3/17/00 ND ND ND ND <br /> IDCW 3/17/00 ND 1 ND 1 ND ND <br /> All concentrations are inµt+/1 except TPH-G,which is in mg/l. <br /> BTEX=benzene,toluene,ethyl benzene,and xylene. <br /> TPH-G=total petroleum hydrocarbons,quantified as gasoline. <br /> ND=not detected at or above laboratory reported detection limit. <br /> ND*=not detected at or above a raised laboratory reported detection limit;see laboratory report for detection limit. <br /> Gasoline Oxygenates/Additives=methyl tertiary butyl ether(MTBE),ethanol,tertiary-butanol, <br /> di-isopropyl ether(DIPS),ethyl tertiary-butyl ether(ETBE),and tertiary amyl methyl ether(TAME). <br /> Lt/ CONDOR <br />