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110 2nd Avenue South, #D7,Pacheco,CA 94553 <br /> McCAMPBELL ANALYTICAL INC. <br /> Tele:510-798-1620 Fax:510-798-1622 <br /> III <br /> QC REPORT FOR EPA 8010/8020/EDB <br /> Date: 09/25/98 Matrix: AIR <br /> Concentration (ug/L) % Recovery <br /> Analyte Sample Amount RPD <br /> 1 (#95447) MS MSD Spiked MS MSD <br /> y <br /> 11, 1-DCE 1 0.0 8.9 9.1 I 10.0 89 91 2:2 <br /> 1Trichloroethene 1 0.0 8.5 8.4 1 10.0 85 84 1.2 1 <br /> 1EDB I 0.0 7.5 7.7 I 10.0 I 75 77 2.6 <br /> lChlorobenzene 1 0.0 9.2 9.0 1 10.0 92 90 2 .2 <br /> 1 1 1 <br /> Benzene I N/A N/A N/A 1 N/A 1 N/A N/A N/A <br /> Toluene I N/A N/A N/A I N/A 1 N/A N/A N/A 1 <br /> 1Chlorobz (PID) I N/A N/A N/A N/A N/A N/A N/A 1 <br /> � I l <br /> % Rec. _ (MS - Sample) / amount spiked x 100 <br /> RPD = (MS - MSD) / (MS + MSD) x 2 x 100 <br />