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4. <br /> Fourth Quarter,2002 Quarterly Groundwater Monitoring Report <br /> Eckert Cold Storage,Manteca,California <br /> January 10,2003 <br /> Page 4 <br /> 3 <br /> Table 2=Groundwater Sample Laboratory Analytical Results(December 9,2002) <br /> GASOLINE OXYGENATES/ADDITIVES <br /> B T E X TPH-G <br /> MTBE Other Gasoline Oxygenates/Additives <br /> s <br /> Untts: µSIL µFAL µPQ µgfL rng/I. µ /L µ8I1- <br /> Analytical Method: <br /> 8260E 8260E 8260E 8260B 8015M 8260E 8260B <br /> Sample I.D. <br /> 3471A-MWI-12/9/02 1,900 8.2 100 400 7.7J 13 tert butanol 190♦ <br /> 3471A-MW3-12/9/02 66 <2.0 160 21 1.7! <2.0 <2.0-<20.0 <br /> 3471A-MW4-12/9/02 <0.5 <0.5 <0.5 <1.0 <0.05 12 1,2-DCA 1S+ <br /> 3471A-MW5-12/9/02 <0.5 <0.5 <0.5 <1.0 <0,05 2.1 1,2-DCA 3.1 <br /> 3471A-MW6-12/9/02 <0.5 <0.5 <0.5 <1.0 -<0,05 <0.5 <0.5-<5.0 <br /> 3471A-MW7-1219/02 <0.5 <0.5 <0.5 <1.0 <0.05 <0.5 <0.5-<5.0 <br /> t <br /> 3471A-MWS-12/9/02 16 <0.5 5.9 <1.0 0.34 4.4 tert butanol 17; 1,2-DCA 2.6* <br /> 3471A-DW-12/9/02 <0.5 <0.5 <0.5 - <1.0 <0.05 <0.5 <0.5-<5,0 <br /> Units: Analytical: :I: <br /> mg/L=milligrams per liter=parts per million(ppm) B,T,E,X=benzene,toluene,ethyl benzene,total xylenes <br /> µg/1.=micrograms per liter=parts per billion(ppb) TPI -G=total petroleum hydrocarbons quantified as gasoline <br /> } Gasoline oxygenates/additives= methyl tertiary butyl ether(MTBE),ethanol, <br /> { tertiary butanol,di-isopropyl ether(DIPE),ethyl tertiary butyl ether(ETBE), <br /> tertiary amyl methyl ether (TAME), 1,2-dibromoethane (EDB), 1,2- <br /> dichloroethane(1,2-DCA) <br /> ♦=all other oxygenates/additives were not detected at or above the laboratory <br /> reported detection limits <br /> FUTURE WORK/RECOMMENDATIONS <br /> The SJCEHD has indicated that continued quarterly groundwater monitoring is required at the site. The <br /> next quarterly monitoring event is scheduled for March 2003' <br /> fn the PAR dated November 25, 2002, Condor discussed various clean-up options and recommended <br /> evaluation of accelerated natural attenuation for site mitigation. Condor anticipates meeting with Eckert <br /> and SJCEHD regarding site remediation in the near future. Based on the results of the additional <br /> groundwater investigation conducted on October 10 and "11!, 2002 (described in the PAR), Condor also <br /> anticipates requesting modification of the existing quarterly groundwater monitoring program. <br /> Ii <br /> Ir <br /> I � � <br /> 41% j. <br /> VA coNoOR 4 <br />