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McCAMPBELL ANALYTICAL INC. 110 2nd Avenue South, #D7,Pacheco,CA 94553 <br /> Tele.-510-79&1620 Fax 510-798-1622 <br /> QC REPORT FOR HYDROCARBON ANALYSES <br /> Date: 07/19-07/20/94 Matrix: Water <br /> 1 Concentration (ug/L) $ Recovery <br /> Analyte Amount RPD <br /> Sample MS MSD Spiked MS MSD <br /> TPH (gas) 0.0 37.3 94.5 100 97.3 94.5 2.9 <br /> Benzene 0 10.2 10.1 10 102.0, 101.0 1.0 <br /> Toluene 0 10 10 10 100.0 100.0 0.0 <br /> Ethyl. Benzene 0 10.1 10.2 10 101.0 102.0 1.0 <br /> ' Xylenes 0 31.2 31 30 104.0 103.3 0.6 <br /> TPH (diesel) 0 140 140 150 93 93 0.1 <br /> TRPH N/A N/A N/A N/A N/A N/A N/A <br /> (oil & grease) <br /> % Rec. = (MS - Sample) / amount spiked x 100 <br /> RPD = (MS - MSD) / (MS + MSD) x 2 x 100 <br /> 1 <br /> 1 <br /> t <br />