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COLUMBIA ANALYTICAL SERVICES,INC <br /> Analytical Report <br /> Clu,nt EMCON Service Request 59900683 <br /> Project Apache Piastics/22640-100 001 Date Collected 2/23/99 <br /> Sample Mati is Soil Date Received 3/2/99 <br /> Fuel Oxygenates <br /> Sample Name B-1(82) Units ug/Kg(ppb) <br /> Lab Code S9900683-008 Basis Wet <br /> Test Notes M1 <br /> Pi eh Analysis Dilution Date Date Result <br /> Analyte Method Mi,thod MRL Factor Extracted Analyzed Result Notes <br /> teat-Butyl Alcohol NONE 8260 S00 20 3/4/99 3/5/99 <10000 <br /> Methyl tert-Butyl Ethei NONE 8260 5 20 3/4/99 3/5/99 <100 <br /> Diisopropyl Ether NONE 8260 50 20 3/4/99 3/5/99 <1000 <br /> Ethyl tert-Butyl Ether NONE 8260 50 20 314/99 3/5/99 <1000 <br /> tent Arnyl Methyl Ethel NONE 8260 50 20 3/4/99 3/5/99 <1000 <br /> Ethanol NONE 8260 5000 20 3/4199 3/5/99 <100000 <br /> • <br /> MI The MRL was elevated because of matrix interferences <br /> The sample contained high cocentrations of petroleum hydrocarbons <br /> 11,441021197P <br /> Page 6 <br />