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n 4 <br /> COLUMBIA ANALYTICAL SERVICES,INC. <br /> Analytical Report <br /> Client: EMCON Service Request: S9901065 <br /> Project: USA Station No.65/1-odi,CA/20A41-008.001 Date Collected: NA <br /> Sample Matrix: Water Date Received: NA <br /> BTEX,MTBE and TPH as Gasoline <br /> Sample Name: Method Blank Units: ug/L(ppb) <br /> Lab Code: S990412-WB1 (GC2) Basis: NA <br /> Test Notes: <br /> Prep Analysis Dilution Date Date Result <br /> Analyte Method Method MRL Factor Extracted Analyzed Result Notes <br /> TPH as Gasoline EPA 5030 CA/LUFT 50 1 NA 4/12199 ND <br /> Benzene EPA 5030 8020 0.5 1 NA 4112/99 ND <br /> Toluene EPA 5030 8020 0.5 1 NA 4/12/99 ND <br /> Ethylbenzene EPA 5030 8020 0.5 1 NA 4/12/99 ND <br /> Xylenes,Total EPA 5030 8020 0.5 1 NA 4/12/99 ND <br /> Methyl Cert-Butyl Ether EPA 5030 8020 3 1 NA 4/12199 ND <br /> IS22/020597p <br /> Page 22 <br />