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McCAMPBELL ANALYTICAL INC 110 2nd Avenue South, #137, Pacheco, CA 94553 <br /> Tele 510-798-1620 Fax 510-798-1622 <br /> QC REPORT FOR HYDROCARBON ANALYSES <br /> Date. 11/10/95-11/11/95 Matrix: Water <br /> Concentration (ug/L) % Recovery <br /> Analyte Amount RPD <br /> Sample MS MSD Spiked MS MSD <br /> TPH (gas) 0.0 94.7 95 6 100 95 96 1.0 <br /> Benzene 0 10 4 10 10 104.0 100.0 3.9 <br /> Toluene 0 10.4 10.1 10 104.0 101.0 2.9 <br /> Ethyl Benzene 0 10.6 10.3 10 106 0 103.0 2.9 <br /> Xylenes 0 32 31.3 30 106 7 104.3 2.2 <br /> TPH (diesel) 0 152 151 150 101 101 0. 6 <br /> TRPH N/A N/A N/A N/A N/A N/A N/A <br /> (oil & grease) <br /> % Rec = (MS - Sampie) / amount spoked x 100 <br /> RPD = (MS - MSD) / (MS + NSD) x 2 x 100 <br /> i <br />