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1 <br /> 110 2nd Avenue South, #D7, Pacheco,CA 94553 <br />' McCAMPBELL ANALYTICAL INC Tele 925-798-1620 Fax 925-798-1622 <br /> QC REPORT FOR VOCs (EPA 8240/8260 ) <br />' Date 11/18/98-11/19/98 Matrix AIR <br />' Concentration (ug/kg,ul Recovery <br /> Analyte Sample I Amount RPD <br /> MS MSD Spiked MS MSD <br /> 11, 1-Dichloroethel 0 113 117 100 113 117 3 5 <br /> ITrachloroethene 1 0 83 82 100 83 82 1 2 <br />' IEDB I N/A N/A N/A I N/A I N/A N/A N/A <br /> lChlorobenzene 1 0 89 91 100 89 91 2 2 <br /> Benzene 1 0 95 100 100 95 100 5 1 <br />' Toluene 1 0 89 92 100 89 92 3 3 <br /> Rec - (MS - Sample) / amount spiked x 100 <br />' RPD - (M$ - MSD) / (MS + MSD) x 2 x 100 <br /> 1 <br /> 1 <br />