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n y Seconduarter,2002 Q Quarterly Groundwater Monitoring Report Eckert Cold Storage,Manteca,California Page 3 LABORATORY ANALYTICAL RESULTS The groundwater samples collected from the monitor wells were analyzed for BTEX, TPH-G, and selected gasoline oxygenates/additives including MTBE by Excelchem Laboratories, Inc. of Roseville, California. The current laboratory analytical results, shown in Table 2, below, are generally consistent with historical laboratory analytical results. Historical groundwater monitoring data is included in Attachment C. Laboratory certificates of analyses and the chain-of-custody for the samples are included in Attachment D. Table 2—Groundwater Sample Laboratory Analytical Results (June 26,2002) GASOLINE OXYGENATES/ADDITIVES B T E X TPH-G TPH-D MTBE Other Gasoline Oxygenates/Additives Detection Limits: 0.5 0.5 0.5 1.0 0.05 1 0.05 0.5 0,5-13 µg/l ltg/l µg/l µg/1 mg/1 mg/1 Pg/l. pg/l Analytical Method: 8260B 8260B 826013 8260E 8015M 8015M 8260E 8260B Sample[, , 3471A-MWI-6/26102 2,000 X50 480 601 l5 0.46* X50 TAME 82+ 3471A-MW3-6/26/02 66 0.8 51 10.5 2.3 0.26* 7.3 1,2-DCA 15+ 347]A-MW4-6/26/02 ND ND ND ND ND ND 1.6 1,2-DCA 3.2+ 3471A-MW5-6/26/02 ND ND ND ND ND ND 1.1 ND . 3471A-MW6-6/26/02 ND Nil ND ND ND NA ND ND 3471A-MW7-6/26102. ND ND ND ND ND ND ND ND 347 l A-M W S-6/26/02 1,100 24 650 1,617 9.8 N D 32 ND 347]A-DW-6126/02 I ND ND ND ND ND ND ND ND 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) TPf 1-G=Iota]petroleum hydrocarbons quantified as gasoline Gasoline oxygenates/additives T methyl tertiary butyl ether(MTBE),ethanol, tertiary butanol,di-isopropyl ether(RIPE),ethyl tertiary butyl ether(ETRE), tertiary amyl methyl ether (TAME), 1,2-dibromoethane (EDB), 1,2- dichloroethane(1,2-DCA) ND=not detected at or above the laboratory reported detection limits NA—not analyzed because the sample container was broken by the laboratory during sample extraction 'W estimated concentration(see laboratory report,Attachment D) ♦=all other oxygenates/additives were not detected at or above the laboratory reported detection limits f = all other oxygenatesladditives were not detected at or above raised laboratory reporting limits FUTURE WORIURECOMAIENDATIONS At the direction of the SJCEHD, Condor prepared and submitted a Problem Assessment Work Plan (PAWP) for the site, dated May 31, 2002. Mr. Harlin Knoll of the SJCEHD approved the PAWP in a letter dated July 11, 2002. Condor subsequently prepared a UST Fund cost pre-approval request dated • July 29, 2002, for the scope of work described by the PAWP. Condor anticipates that the work described by the PAWP will be conducted in September 2002, pending UST Fund pre-approval. %4 CONDOR