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i <br /> Excelchem Environmental Labs <br /> Geological Technics Project: VALENTINES <br /> 1101 7th Street Project Number: 723.2 Date Reported:. <br /> Modesto,CA 95354 Project Manager: Geological Technics 06/08/07 12:46 <br /> Oxygenates-Quality Control <br /> Analyte Result RePy ummnij Units Le el Result %RECLim is RPD Limlit Notes <br /> Batch AQF0018-EPA 8260B <br /> Blank(AQF0018-BLKI) Prepared&Analyzed:06/05/07 <br /> Surrogate:Dibromofluoromethane 10.4 ug/l 12.5 83.2 70-130 <br /> Surrogate:Toluene-d8 11.6 12.5 92.8 70-130 <br /> Surrogate:4-Bromofluorobenzene 12.8 12.5 102 70-130 <br /> Gasoline Range Hydrocarbons ND 50.0 mg/ml Air <br /> Ethanol ND 20.0 <br /> TBA ND 5.0 " <br /> Methyl tert-Butyl Ether ND 0.5 " <br /> Di-isopropyl ether ND 0.5 " <br /> Ethyl tert-Butyl Ether ND 0.5 " <br /> Tert-Amyl Methyl Ether ND 0.5 " <br /> 1,2-Dichloroethane ND 0.5 " <br /> 1,2-Dibromoethane(EDB) ND 0.5 " <br /> Benzene ND 0.5 " <br /> Toluene ND 0.5 " <br /> Ethylbenzene ND 0.5 <br /> rri,p-Xylene ND 1.0 " <br /> o-Xylene ND 0.5 " <br /> Xylenes,total ND 1.0 " <br /> LCS(AQF0018-BS1) Prepared&Analyzed:06/05/07 <br /> Surrogate:Dibromofluoromethane 10.3 ug/l 12.5 82.4 70-130 <br /> Surrogate:Toluene-d8 11.7 12.5 93.6 70-130 <br /> Surrogate:4-Bromofluorobenzene 12.4 12.5 99.2 70-130 <br /> Benzene 9.1 0.5 mg/ml Air 10.0 91.0 20-120 <br /> Toluene 8.4 0.5 10.0 84.0 20-120 <br /> 1,1-Dichloroethene <br /> 10.8 D;5 10:0 198 20=120 <br /> Trichloroethene 9.2 0.5 10.0 92.0 20-120 <br /> Chlorobenzene 8.1 0.5 10.0 81.0 20-120 <br /> Excelchem Environmental Lab. The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Laboratory Representative Page 4 of <br />