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110 2nd Avenue South, #D7, Pacheco,CA 94553 <br />' McCAMPBELL ANALYTICAL. INC Tele 925-798-1620 Fax 925-798-1622 <br /> QC REPORT FOR HYDROCARBON ANALYSES <br /> Date 09/01/98-09/02/98 Matrix AIR <br /> ' Concentration (mg/L) Recovery <br /> Analyte ISample I Amount RPD <br /> [ (##94114) MS MSD Spiked MS MSD <br /> TPH (gas) 1 0 0 91 3 96 6 1 100 0 I 91 3 96 6 5 7 <br /> Benzene 1 0 0 8 9 9 1 1 10 0 89 0 91 0 2 2 <br /> ' Toluene 1 0 0 9 2 9 4 1 10 0 92 0 94 0 2 2 <br /> Ethyl Benzene 1 0 0 9 4 9 7 1 10 0 94 0 97 0 3 1 <br /> Xylenes 1 0 0 28 6 29 3 1 30 0 95 3 97 7 2 4 <br /> 1 <br /> JTPH(diesel) 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 /> (oil & grease) <br /> 1 <br /> ' V Rec . (MS - Sample) / amount spiked x 100 <br /> RPD {MS - MSM / (MS + MSD) x 2 x 100 <br />