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.N r^ Third Quarter 2004 Groundwater Monitoring Report Eckert Cold Storage,Manteca,California October 22,2004 Page 3 LABORATORY ANALYTICAL RESULTS The groundwater samples collected on September 7, 2004 from monitoring wells MW-4 and MW-8 were analyzed for BTEX, TPH-G, and selected gasoline oxygenates/additives including MTBE by Argon Laboratories of Ceres, California. The current laboratory analytical results, shown in Table 2, below, are generally consistent with historic laboratory analytical results. Historic groundwater monitoring data are included in Attachment C. Laboratory certificates of analyses and the chain-of-custody documentation for the samples are included in Attachment D. Table 2—Groundwater Sample Laboratory Analytical Results (September 7, 2004) GASOLINE OXYGENATES/ADDITIVES B T E X TPH-G MTBE Other Gasoline Oxygenates/Additives Units: µg/L pg/L µ8/L µ€l1- mg/L ?r$/l- µg/L Analytical Method: 8260B 8260B 8260B 82608 8015M 8260B 8260B Sample I.D. 3471-MW4-9/7/04 <0.5 <0.5 <0.5 <1.0 <0.05 7.1 11 (1,2-DCA) 3471-MWS-9/7104 130 1.1 4.6 1.0 1.0 l8 53(TBA);3.0(1,2-DCA)0 • Units: Analytical: mg/L:milligrams per liter,parts per million(ppm) B,T,E,X=benzene,toluene,ethyl benzene,total xylenes µg/L:micrograms per liter,parts per billion(ppb) TPH-G=total petroleum hydrocarbons quantified as gasoline Gasoline oxygenates/additives= methyl tertiary butyl ether(MTBE),ethanol, tertiary-butanol (TBA), di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETRE),tertiary amyl methyl ether(TAME), 1,2-dibromoethane(BBB), 1,2- dichlomethane(1,2-DCA) 0=all other oxygenates/additives were not detected at or above the laboratory reported detection limits FUTURE WORK/RECOMMENDATIONS The SJCEHD has indicated that continued quarterly groundwater monitoring is required at the site. The next quarterly monitoring event is scheduled for December 2004. LIMITATIONS AND SIGNATURES This report was prepared under the direct supervision of a Registered Geologist in the State of California. The standard of care for all services performed or furnished by Condor is commensurate with the care and skill ordinarily used by a member of the environmental profession practicing under similar conditions at the same time in the same locality. Condor is not responsible for the accuracy and completeness of information collected and developed by others. This report was prepared for the sole use of Eckert Cold Storage Co., and may not be used or relied upon by any other person(s) without the express written consent and authorization of Eckert Cold Storage Co. • and Condor. If any changes are made or errors found in the information used for this report, the interpretations and conclusions contained herein shall not be considered valid unless the changes or errors �.1� CONDOR