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c�G OG�I laboratories <br /> Ground Zero Analysis,Inc. Project Number: 256 <br /> 1714 Main Street Project Name: Gabbard Work Order No.: <br /> Escalon,CA 95320 Project Manager: Greg Stahl I808032 <br /> Oxygenates - Method: EPA 8260B-Quality Control <br /> Argon Laboratories <br /> Reporting Spike Source %REC RED <br /> AnalyteResult Limit Units Level Result %AEC Limits RPD Limit Notes <br /> Batch I801692-EPA 5030B <br /> Blank(1801692-BLKl) Prepared&Analyzed:08/16/08 <br /> Surrogate:Flwmbenzene 46.0 ug/L 50.0 92 70-130 <br /> t-Butanol ND 5.0 " <br /> Methyl tart-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 NO 0.5 " <br /> 1,2-Dibromoethane(EDB) ND 0.5 " <br /> LCS(1801692-BSI) <br /> Prepared&Analyzed:08/16/08 <br /> Methyl tart-Butyl Ether 24.5 ug/L 25.0 98 80-120 <br /> LCS Dup(1801692-BSDI) Prepared&Analyzed:08/16/08 <br /> Methyl tert-Butyl Ether 23.1 ug/L 25.0 92 80-120 6 20 <br /> Batch 1801798-EPA 5030B <br /> Blank(1801798-BLKI) Prepared&Analyzed:08/19/08 <br /> t-Butanol ND 5.0 ug/L <br /> Methyl ten-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 /> LCS(1801798-BSI) Prepared&Analyzed:08/19/08 <br /> Di-Isopropyl Ether 23.1 ug/L 25.0 92 80-120 <br /> LCS Dup(1801798-BSDI) Prepared&Analyzed:08/19/08 <br /> Di-Isopropyl Ether 24.4 ug/L 25.0 98 80-120 5 20 <br /> Appr rved By <br /> Argo i Laboratories,Inc. California D.O.H.S.Cert.#2359 <br /> 2905 Railroad Avenue, Ceres, CR 95307 • Phone (209) 581-9280 • fox (209) 581-9282 <br /> email: info@argonlabs.com Page 6 of <br />