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CHEMWEST ANALYTICAL LABORATORIES <br /> HALOGENATED VOLATILE ORGANICS <br /> EPA METHOD: 8010 <br /> Quality Control <br /> Client ID: LQCS GC-3 W324 <br /> Date Analyzed: 07/10/92 CHEMWEST ID: 9796-QC2 <br />' Matrix Water <br /> Spike % % <br />' CompoundConc. Recovery Recovery <br /> ----------------------- 9796-MBS 9796-MBD RPD <br /> --- ------------ <br /> 1, 1-Dichloroethane 6 . 0 100$--------------------- <br /> Chloroform 6 . 0 107% 7% <br /> Trichloroethene 92% 100% 8% <br /> Bromadichloromethane 6 . 0 102% 107% 5% <br /> 6' 0 10 <br /> Tetrachloroethene 103% 3$ <br /> Chlorobenzene 6 ' 0 1022$% 98% 4% <br /> ' 6 . 0 102% 100% 2% <br /> ------------------------------------- <br /> Spike % % <br /> Surrogates Conc. Recovery Recovery <br /> 9/ ) 9796-MBS 9796-MBSD <br /> -----u---------------------- <br /> ' Bromochloromethane ------------- <br /> ortho-Chlorotoluene 20 94%87% 101% <br /> ----__-_ 94� 101 <br /> ----------------------------------------------------------- <br /> ' Date R <br /> Approved b sported: <br /> y' `� 07/15/92 REV4 . 1 . 90 <br /> COM"JO WFSTFRN DIVISION <br />