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McCAWBELL ANALYTICAL INC. 110 tad Avenue South,#D7,Pacheco,CA 94553 <br />' Tele:510-798-1620 Fax 510-79&1622 <br /> QC REPORT FOR HYDROCARBON ANALYSES <br />' Date: 04/17/94 Matrix: Water <br />' Concentration (ug/L) Recovery <br /> Analyte Amount RPD <br /> Sample MS MSD Spiked MS MSD <br /> TPH (gas) 0.0 98.6 96.6 100 98.6 96.6 2.1 <br /> ' Benzene 0 9.4 8.8 10 94.0 88.0 6.6 <br /> Toluene 0 9 9 10 90.0 90.0 0.0 <br /> Ethyl Benzene 0 9.4 9.7 10 94.0 97.0 3.1 <br /> Xylenes 0 27.9 28.4 30 93.0 94.7 1.8 <br /> TPH (diesel) 0 163 144 150 109 96 12.0 <br /> TRPH N/A N/A N/A N/A N/A N/A N/A <br /> ' (oil & grease) <br /> ' % Rec. = (MS - Sampte) / amount spiked x 100 <br /> RPD = (MS - MSD) / (MS + MSD) x 2 x 100 <br />