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M AMPBELL ANALYTICAL INC 110 2nd Avenue South, #D7, Pacheco, CA 94553 <br /> Tele 510-798-1620 Fax 510-798-1622 <br /> QC REPORT FOR HYDROCARBON ANALYSES <br /> Date: 05/17/95 Matrix. Water <br /> Concentration (ug/L) % Recovery <br /> Analyte Amount RPD <br /> Sample MS MSD Spiked MS MSD <br /> TPH (gas) 0.0 104.9 99.9 100 104.9 99.9 4.8 <br /> Benzene 0 9.3 9 2 10 93.0 92.0 1.1 <br /> Toluene 0 9.6 9.6 10 96.0 96.0 0.0 <br /> Ethyl Benzene 0 9.6 9.6 10 96.0 96.0 0.0 <br /> Xylenes 0 29.9 30 30 99.7 100.0 0.3 <br /> TPH (diesel) 0 159 170 150 106 114 6.8 <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 /> RPO = (MS - MSD) / (MS + MSO) x 2 x 100 <br /> -- <br />