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ao� laboratories <br /> QUALITY CONTROL DATA <br /> METHOD: EPA 8260B <br /> AL Job No:D04501 <br /> Instrument HP GC/MS <br /> Matrix:Soil <br /> Surrogate Standard Recovery Summary <br /> Date Analyzed Client ID Lab ID <br /> %Recovery %Recovery Toluene- %Recovery 4- <br /> Dibromofluoromethane d8 Bromofluorobenzene <br /> 05/02/03 Blank BLK00502 120 98 97 <br /> 05/02/03 North TK-8' D04501 120 101 122 <br /> 05/02103 South TK-8' D04502 97 100 116 <br /> 05/02/03 Trench-N D04503 119 99 86 <br /> 05/02103 Dispenser M4504 120 98 77 <br /> 05/02/03 Filter D04505 119 111 120 <br /> 05/02103 Trench-E D04506 122 98 86 <br /> 05102103 Stockpile4N,S)Comp. D04507 115 97 98 <br /> Matrix Spike Recovery Summary <br /> Lab ID Client ID Analyte Percent Recovery %RPD %LCS <br /> MSI MSD <br /> D05021 G MW-1 1,1-Dichloroethene 75 178 4 75 <br /> Benzene 87191 4 91 <br /> Trichloroethene 83187 5 89 <br /> Toluene 88191 3 95 <br /> Chlombenzene 80 / 87 8 89 <br /> Note:Daily method blank showed no contamination at or above the reporting limits. <br /> All laboratory quality control parameters were found to be within established limb. <br /> 3037 Fifth St., Ceres, CA 95307 • Phone: (209) 581-9280 • Fax: (209) 581-9282 <br />