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110 2nd Avenue South,#137,Pacheco,CA 94553 :I <br /> McCAMPBELL ANALYTICAL INC. Tele:510-798-1620 Fax:510-798-1622 <br /> QC REPORT FOR EPA 8010/8020/EDB <br /> Date: 09/24/98 Matrix: AIR <br /> Concentration (ug/L) % Recovery <br /> Analyte Sample Amount RPD <br /> 1 (#95389) MS MSD Spiked MS MSD <br /> 11, 1-DCE 0.0 9.0 9.1 1 10 .0 I 90 91 1.1 <br /> Trichloroethene 1 0 .0 8.5 8.6 1 10.0 85 86 1.2 <br /> (EDB 1 0 .0 .8.0 7.9 10.0 80 79 1.3 { <br /> lChlorobenzene 1 0.0 9.3 . 9.3. 10.0 93 93 0.0 <br /> (Benzene I N/A N/A N/A I N/A N/A N/A N/A <br /> Toluene I N/A N/A N/A I N/A N/A N/A N/A <br /> IChlorobz (PID) I N/A N/A N/A N/A I N/A N/A N/A <br /> Rec. _ (MS - Sample) / amount spiked x 100 <br /> RPD (MS - MSD) / (MS + MSD) x 2 x 100 <br /> I <br /> i <br /> i <br /> 1 <br /> 3 <br /> 3 <br />