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110 2nd Avenue South, #D7,Pacheco,CA 94553 <br /> EMcCAMPBELL ANALYTICAL INC Tele 510-798-1620 Fax-510-798-1622 <br /> • <br /> QC REPORT FOR HYDROCARBON ANALYSES <br /> Date 07/16/97 Matrix Air <br /> Concentration (mg/L) Recovery <br /> Analyte Sample Amount RPD <br /> ## (78563) MS MSD Spiked MS MSD <br /> TPH (gas) 0 0 97 8 97 4 100 0 97 8 97 4 0 5 <br /> l <br /> Benzene 0 0 10 0 9 6 10 0 100 0 96 0 4 1 <br />' Toluene 0 0 10 5 10 3 10 0 105 0 103 0 1 9 <br /> Ethyl Benzene 0 0 10 7 10 6 10 0 107 0 106 0 0 9 <br /> Xylenes 0 0 32 2 31 7 I 30 0 107 3 105 7 1 6 <br /> ITPH (diesel) I N/A N/A N/A N/A N/A N/A N/A <br />' TRPH N/A N/A N/A N/A N/A N/A N/A <br /> (ail & grease) f <br />' Rec (Ms - Sample) / amount sp-ked x 100 <br /> RPR (MS - MSD) / SMS + MSD} x 2 x 100 <br /> 1 <br />