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COLUMBIA ANALYTICAL SERVICES,INC. <br /> Analytical Report <br /> Client: EMCON Service Request: 59901001 <br /> Project: Teichert&Sons-Stockton/20F90-002.007 Date Collected: 3/24199 <br /> Sample Matrix: Soil Date Received: 3/25199 <br /> BTEX and TPH as Gasoline <br /> Sample Name: SP-7A/B Units: mg/Kg(ppm) <br /> Lab Code: S9901001-031 Basis: Wet <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 1 1 4/2/99 4/5/99 4 G2 <br /> Benzene EPA 5030 8020 0.005 1 4/2/99 4/5/99 ND <br /> Toluene EPA 5030 8020 0.005 1 4/2199 4/5199 ND <br /> Ethylbenzene EPA 5030 8020 0.005 1 4/2/99 415/99 ND <br /> Xylenes,Total EPA 5030 8020 0.005 1 4/2/99 415/99 ND <br /> G2 Sample contains a higher boiling point hydrocarbon mixture quantitated as gasoline. The <br /> chromatogram did not match the typical gasoline fingerprint. <br /> IS22/020597p <br /> Page 23 <br />