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i, 110 2nd Avenue South,#D7,Pacheco, CA 94553 <br /> 7McCAMPBELL ANALYTICAL INC Tele 510-798-1620 Fax 510-798-1622 <br /> i <br />' QC REPORT FOR HYDROCARBON ANALYSES <br /> Date 03/23/96-03/24/96 Matrix Air <br /> Concentration (ug/L) I t Recovery <br /> I Analyte Amount RPD <br /> Sample MS MSD Spiked I MS MSD <br /> i <br /> TPH (gas) I 0 0 101 2 101 6 i 100 0 101 2 101 6 0 4 j <br /> Benzene I 0 0 9 6 10 0 I 10 0 96 0 100 0 4 1 <br /> Toluene 0 0 10 2 10 4 I 10 0 102 0 104 0 1 9 j <br /> Ethyl Benzene 0 0 10 6 10 6 I 10 0 106 0 106 0 0 0 <br />' Xylenes I 0 0 30 3 32 4 I 30 0 101 0 108 0 6 7 I <br /> TPH (diesel) i N/A N/A N/A i N/A i N/A N/A N/A <br /> T'RPH I N/A N/A N/A I N/A I N/A N/A N/A <br />' I (oil & grease) I <br /> $ Rec (MS - Sample) / amount spiked x 100 <br /> RPD = (MS - MSD) / (MS + MSD) x 2 x 100 <br /> 1 <br />