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First Quarter 2004 Groundwater Monitoring Report <br /> Eckert Cold Storage,Manteca,California <br /> April 8,2004 <br /> Page 3 <br /> • LABORATORY ANALYTICAL RESULTS <br /> The groundwater samples collected on March 17, 2004 from monitoring wells MW-4, MW-8, and <br /> domestic well DW-1 were analyzed for BTEX, TPH-G, and selected gasoline oxygenates/additives <br /> including MTBE by Argon Laboratories of Ceres, California. The current laboratory analytical results, <br /> shown in Table 2, below, are generally consistent with historic laboratory analytical results. Historic <br /> groundwater monitoring data are included in Attachment C. Laboratory certificates of analyses and the <br /> chain-of-custody documentation for the samples are included in Attachment D. <br /> Table 2—Groundwater Sample Laboratory Analytical Results (March 17, 2004) <br /> GASOLINE OXYGENATES/ADDITIVES <br /> B T E X TPH-G <br /> MTBE Other Gasoline Oxygenates/Additives <br /> Units: }rg/L µ8/L µg/L Ag/L mg/L pg/L !t?ll <br /> Analytical Method: 8260B 8260B 8260B 8260B 8015M 8260B 8260B <br /> Sample I.D. <br /> 3471-MW4-3/17/04 <0.5 <0.5 <0.5 <1.0 <0.05 4.0 14(1,2-DCA) <br /> 3471-MW8-3/17104 140 0.8 67 2.3 0.72 5.5 13(TBA) <br /> #3471-DW 1-3/17104 <0.5 <0.5 <0.5 <1.0 <0.05 <0.5 <0.5—<5,0 <br /> #:3471-DWI-3/17/04 mistakenly identified as 3471-SWI-3/17/04 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 /> µg/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 (D1PE), ethyl tertiary butyl ether <br /> (ETBE),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 WORKIRECOMMENDATIONS <br /> The SJCEHD has indicated that continued quarterly groundwater monitoring is required at the site. The <br /> next quarterly monitoring event is scheduled for .lune 2004. This will be the second quarter sampling <br /> event and consist of sampling monitoring wells MW-4, MW-8, and the domestic well DW-1. <br /> �.� CONDOR <br />