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1 <br /> Herman&Helen s Manna- Fourth Quarter 1999 Groundwater Monitoring <br /> Ftbruary 1 2000 <br /> Page -8- <br /> TABLE 5 <br />' Historical Surface Water Momtonng Data <br /> B T E X TPH-G Gasoline Oxygenates/Additives <br />' Detection DATE 03 03 03 06 005 1 0 - 10 <br /> Limits 4g/1 µg/1 4g/1 µg/l mg/1 4g/1 <br />' Sample I D <br /> DDN 10/1/98 ND 23 ND ND ND 16(MTBE) <br />' DDS 10/1/98 ND ND ND ND ND 4 7 (MTBE) <br /> IDCE 1011/98 ND ND ND ND ND 1 2 (MTBE) <br /> IDCW 10/1/98 ND ND ND ND ND ND <br /> DDN 12/30/98 ND ND ND ND ND 1 4 (MTBE) <br />' DDS 12/30/98 ND ND ND ND ND 1 0 (MTBE) <br /> IDCE 12/30/98 ND ND ND ND ND ND <br /> IDCW 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 3/26/99 ND 83 ND ND ND* 3,500 (MTBE) 28 (TAME) <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 /> DDN 6/30199 ND ND ND ND ND 5 4 (MTBE) <br /> DDS 6/30199 ND ND ND ND ND 1 8 (MTBE) <br /> IDCE 6/30/99 ND ND ND ND ND ND <br /> IDCW 6/30/99 ND ND ND ND ND 1 4 (MTBE) <br /> DDN 9/23/99 06 ND ND 09 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 I ND ND ND <br /> All concentrations are in Ag/l except TPH-G,which is in mg/1 <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 ternary butyl ether(MTBE),ethanol,tertiary-butanol, <br /> Idi-isopropyl ether(DIPE),ethyl ternary-butyl ether(ETBE),and tertiary amyl methyl ether(TAME) <br /> 5. SUMMARY/CONCLUSIONS <br /> rOn December 22, 1999, Condor conducted Quarterly groundwater and surface water monitoring at Herman & <br /> Helen's Marina located at Venice Island Ferry in Stockton, California Laboratory analytical results of the <br /> groundwater samples collected during the fourth quarter, 1999, monitoring event are generally consistent with <br /> historical quarterly groundwater analytical data Benzene and total xylenes were detected for the second time in <br /> the groundwater sample collected from MW-3 <br /> `� CONDOR <br />