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,l <br /> Fourth Quarter 2003 Groundwater Monitoring Report <br /> Eckert Cold Storage,Manteca,California <br /> January 13,2004 <br /> Page 3 <br /> LABORATORY ANALYTICAL RESULTS <br /> The groundwater samples collected from monitor wells MW-4, MW-5, MW-7, MW-8, and domestic well <br /> DW-1 were analyzed for BTEX, TPH-G, and selected gasoline oxygenates/additives including MTBE by <br /> Argon Laboratories of Ceres, California. The current laboratory analytical results, shown in Table 2, <br /> below, are generally consistent with historical laboratory analytical results. Historical groundwater <br /> monitoring data are included in Attachment C. Laboratory certificates of analyses and the chain-of- <br /> custody for the samples are included in Attachment D. <br /> Table 2--Groundwater Sample Laboratory Analytical Results (December 12, 2003) <br /> GASOLINE OXYGENATES/ADDITIVES <br /> B T E X TPH-C <br /> MTBE Other Gasoline Oxygenates/Additives <br /> Units: pg/L pg/L pg/L pg/L mg/L pg/L p�L <br /> Analytical Method: <br /> 8260B. 8260B 8260E 8260E 8015M 82608 8260B <br /> Sample I.D. <br /> 3471-MW4-12/12/03 <0.5 <0.5 <0.5 <1.0 <0.05 7.0 15(1,2-DCA) <br /> 3471-MW5-12/12/03 <0.5 <0.5 <0.5 <L0 <0.05 1.1 2.3(1,2-DCA) <br /> 3471-M W 7-12112103 <0.5 <0.5 <0.5 <1.0 <0.05 <0.5 <0.5-<5.0 <br /> 3471-MWS-12/12/03 8.9 <0.5 6.9 <1.0 0.43 3.4 14(TBA); 1.4(1,2-DCA) <br /> 3471-DWI-12/12/03# <05 <0.5 <0.5 <1.0 <0.05 <D.5 <0.5--<5.0 <br /> #:3471-DW1-12112103 mistakenly identified as 3471-SWI-12/12/03 on Chain of Custody and Laboratory Reports. <br /> Units: Analytical: <br /> mg/L:milligrams per liter,parts per million(ppm) B,T,E,X=benzene,toluene,ethyl benzene,total xylenes <br /> pg/L:micrograms per liter,parts per billion(ppb) TPH-G=total petroleum hydrocarbons quantified as gasoline <br /> Gasoline oxygenates/additives= methyl tertiary butyl ether(MTBE),ethanol, <br /> tertiary-butanol (TBA), di-isopropyl ether (DIPS), ethyl tertiary butyl ether <br /> (ETBE), tertiary amyl methyl ether(TAME), 1,2-dibromoethane(EBB), 1,2- <br /> dichloroethane(1,2-DCA) <br /> = all other oxygenates/additives were not detected at or above the <br /> laboratory 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 2044. This will be a quarterly sampling event and <br /> consist of sampling monitor wells MW-4, MW-8, and the domestic well DW-1. Condor recommends that <br /> monitor well MW-5 be repaired and resurveved or destroyed. <br /> ,i <br /> �`a CONDOR <br />