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COLUMBIA ANALYTICAL SERVICES,INC <br /> Analytical Report <br /> Client EMCON Service Request 59901190 <br /> Project Apache Plastics,Stockton/22540-100 001 Date Collected 4/9199 <br /> Sample Matrix Water Date Received 4/13/99 <br /> BTEX, MTBE and TPH as Gasoline <br /> Sample Name MW-9 Units ug/L(ppb) <br /> Lab Code S9901190-402 Basis NA <br /> Test Notes <br /> Prep Analysts Dilution Date Date Result <br /> Analyte Method Method MRL Factor Extracted Analyzed Result Notes <br /> TPH as Gasoline EPA 5030 CA/LUFT 50 1000 NA 4/21/99 170004 <br /> Benzene EPA 5030 8020 0 5 1000 NA 4/21/99 17000 <br /> Toluene EPA 5030 8020 0 5 1000 NA 4/21/99 41000 <br /> Ethylbenzene EPA 5030 8020 0 5 1400 NA 4/21/99 2700 <br /> Xylenes,Total EPA 5030 8020 0 5 1000 NA 4/21/99 18000 <br /> Methyl tert-Butyl Ether EPA 5030 8020 3 40 NA 4/20/99 530 <br /> • <br /> C1 The MRL was elevated due to high analyte concentration requiring sample dilution <br /> tS221020597p <br /> i <br />