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110 2nd Avenue South, #D7, Pacheco, CA 94553 <br /> McCAMPBELL ANALYTICAL INC Tele 510-798-1620 Fax 510-798-1622 <br />' QC REPORT FOR HYDROCARBON ANALYSES <br />' Date: 03/07/95 Matrix: Air <br />' Concentration (ug/L) $ Recovery <br /> Analyte Amount RPD <br />' Sample MS MSD Spiked MS MSD <br /> TPH (gas) 0.0 91.3 93.2 100 91.3 93.2 2.1 <br />' Benzene 0 9.1 9.5 10 91.0 95.0 4.3 <br /> Toluene 0 9.5 9.8 10 95.0 98.0 3. 1 <br /> Ethyl Benzene 0 9.4 9.6 10 94.0 96.0 2 1 <br /> Xylenes 0 29 29.9 30 96:7 99. 7 3.1 <br /> TPH (diesel) N/A N/A N/A N/A N/A N/A N/A <br /> TRPH N/A N/A N/A N/A N/A N/A N/A <br /> (oil & grease) <br /> % Ree. _ (MS - Sample) / amount spiked x 100 <br /> RPD = (MS - MSD) / (MS + MSD) x 2 x 100 <br />