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McCAMPBELL ANALYTICAL INC. 110 2nd Avenue South, #D7, Pacheco, CA 94553 <br /> Tele:510-798 Fax:51O-798-1622 <br /> QC REPORT FOR HYDROCARBON ANALYSES <br /> Date: 09/14/94 Matrix: Soil <br /> Concentration (mg/kg) % Recovery <br /> Analyte Amount <br /> RPD <br /> Sample MS MSD Spiked MS MSD <br /> TPH (gas) 0.000 1.773 1.701 2.03 87 84 4.1 <br /> Benzene 0.000 0.182 0.172 0.2 91 86 5.6 <br /> Toluene 0.000 0.188 0.182 0.2 94 91 3.2 <br /> Ethylbenzene 0.000 0.184 0.192 0.2 92 96 4.3 <br /> Xylenes 0.000 0.578 0.566 0.6 96 94 2.1 <br /> TPH (diesel) 0 308 305 300 103 102 0.8 <br /> TRPH N/A N/A N/A N/A N/A N/A N/A <br /> (oil & grease) <br /> X Rec. _ (MS - Sample) / amount spiked x 100 <br /> RPD = (MS - MSD) / (MS + MSD) x 2 x 100 <br />