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g7o@a laboratories <br /> QUALITY CONTROL DATA <br /> AL Job No E10571 METHOD EPA 8260B <br /> Instrument HP GC/MS <br /> Matnx Water <br /> Surrogate Standard Recovery Summary <br /> I Date Analyzed Client ID Lab ID %Recovery r.Recovery Toluene- %Recovery 4- <br /> Dibmmoffuoromethane da Bromofluorobenzene <br /> 10/29/04 Blank BLKE1029 104 103 89 <br />' 10/29/04 TW Efflu E10571 115 99 83 <br /> 10/29104 TW Influ E10572 103 100 89 <br /> 10/29/04 TW AS-1 E10573 104 104 96 <br />' 10/29/04 TW C-1 E10574 103 100 86 <br /> 10/29/04 TW C-2 E10575 109 101 82 <br /> I <br />' Matrix Spike Recovery Summary <br />' Lab ID Client ID Analyte Percent Recovery %RPD %LCS <br /> MS 1 MSD <br /> E10571 TW Efflu 1,1-Dtchloroethene 113 1 113 0 114 <br /> Benzene 106 / 105 1 108 <br /> Tnchloroethene 98 / 94 4 97 <br /> Toluene 103198 5 104 <br /> Chlorobenzene 100 / 95 5 99 <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 limits <br />' 2905 Railroad Avenue Ceres, CA 95307 • Phone (209) 581 -9280 • Fox (209) 581 -9282 <br /> emoll lnfo@orgonlohs com <br />