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WCAMPBELL 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. 03/21/95 Matrix: Water <br /> Concentration (ug/L) % Recovery <br /> Analyte Amount <br /> Sample MS MSD Spiked MS MSD RPD <br /> TPH (gas) <br /> 0.0 104.7 95.4 100 104.7 95.4 9.3 <br /> Benzene 0 8.3 9. 1 10 83.0 91.0 9.2 <br /> Toluene 0 8.4 9.2 10 84.0 92.0 9.1 <br /> Ethyl Benzene 0 8.5 9.2 10 85.0 92.0 7,9 <br /> Xylenes 0 26.7 28.8 30 89.0 96.0 7.6 <br />[� TPH (diesel} 0 162 161 150 108 107 0.7 <br /> TRPH <br /> (oil & grease) N/A N/A N/A N/A N/A N/A N/A <br /> % Rec = (MS - Sampte) / amount spiked x 100 <br /> RPD = (MS - MSD) / (MS + MSD) x 2 x 900 <br /> a <br />