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M77; <br /> MPBELL 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: 12/31/94 Matrix: Water <br /> Concentration (ug/L) Recovery <br /> Analyte Amount RPO <br /> Sample MS MSD Spiked MS MSD <br /> TPH (gas) 0.0 98.9 92.9 100 98.9 92.9 6.3 <br /> Benzene 0 10.7 10.8 10 107.0 108.0 0.9 <br /> Toluene 0 30.7 10.6 10 107.0 106.0 0.9 <br /> Ethyl Benzene 0 10.7 10.6 10 107.0 106.0 0.9 <br /> Xylenes 0 32.9 31.6 30 109.7 105.3 4.0 <br /> TPH (diesel) 0 151 150 150 101 100 0.5 <br />• <br /> TRPH N/A N/A N/A N/A N/A N/A N/A <br /> (oil & grease) <br /> % Rec. = (SIS - Sampte) / amount spiked x 100 <br /> RPD = (MS - NSD) / (MS + MSO) x 2 x 100 <br />