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A. <br /> t ITORthc. <br /> CEO_ CEO-MON 3 Fliv� *0 <br /> s 6 j, 4Jii1"l E_ Tedi_ f f fj <br /> P.O.-BOX 1428 t"i F( C r 71/ iAl-M <br /> 17152 DARWIN AVENUE <br /> MONITOR, HESPERIA,California 92345 °t ;i f 7 Pik' 2: 18 <br /> 1NC. (619)244-3481 <br /> !N <br /> ", i <br /> ` Date Finished: 712193 <br /> Date Started: 711193 <br /> QUALITY ASSURANCE/QUALITY CONTROL SUMMARY <br /> f <br /> FOR BTXE �: <br /> ;ANALYTE CONC FOUND ACCURACY MEAN ACCURACY RPD <br /> Spike S. Dup Spike S. Dup. <br /> 110 9.1 <br /> IIE-Benzene 11.5 10.5 _115 105 <br /> 7.3 <br /> }Toluene 11.8 12.7 11:8 127194.b 17 .2 <br /> lI PM-xylene* 50.2 41.9 102.7 86.4 <br /> I <br /> * spike level 48.9 ppb <br /> ** spike level = 10 ppb unless otherwise specified <br /> SAMPLES: 93GC374-381 <br /> €, CONTINUING CALIBRATION <br /> f!, E <br /> ANALYTE CONC. CONC. FOUND %RECOVERY <br /> (ug/L) (ug/L) <br /> i Benzene 10.0 12.7 127 <br /> Toluene 10.0 10.3 103 <br /> E-benzene 10.0 9.77 97.7 <br /> )!'M&P-xylene 20.0 18.9 94.5 <br /> O-xylene 10.0 10.3 103 <br /> Gknmm:gcb7193 <br /> i <br /> +r <br />