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a a oa laboratories <br /> QUALITY CONTROL DATA <br /> METHOD EPA 8260B <br />' AL Job No D12171 <br /> Instrument HP GC/MS <br /> Matnx Water <br /> Surrogate Standard Recovery Summary <br /> Date Analyzed Client ID Lab ID %Recovery %Recovery Toluene- %Recovery 4- <br />' Dibromofluoromethane d8 Bromofluorobenzene <br /> 12/10/03 Blank BLKD1210 105 101 87 <br /> 12/10/03 G MW-1 D12171 106 101 86 <br />' 12/10/03 G MW-2 012172 97 100 89 <br /> 12110/03 G MW-3 D12173 94 108 102 <br /> 12110/03 G MW-4 D12174 106 106 90 <br />' 12110/03 G MW-5 D12175 104 99 $6 <br /> 12/10/03 G MW-6 D12176 105 102 88 <br /> 12/10/03 G MW-7 D12177 101 104 89 <br />' Matnx Spike Recovery Summary <br /> Lab ID Client ID Analyte Percent Recovery <br /> %RPD °/°LCS <br />' MS 1 MSD <br /> D12175 G MW-5 1,1-Drchloroethene 94 ! 94 0 97 <br />' Benzene 115 ! 112 3 114 <br /> Tnchloroethene 96 1 95 1 94 <br /> Toluene 94194 0 94 <br /> Chlorobenzene 95 1 96 1 95 <br /> Note Daily method blank showed no cwntamrnatson at or above the reporting limits <br /> All laboratory quality control parameters were found to be within established limits <br /> i <br /> • <br /> i <br /> 3037 Fifth St , Ceres, CA 95307 • Phone (209) 581-9280 Fax (209) 581-9282 <br />