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110 2nd Avenue South, #D7,Pacheco, CA 94553 <br />' McCAMPBELL ANALYTICAL INC Tele 510-798-1620 Fax 510-798-1622 <br /> QC REPORT FOR HYDROCARBON ANALYSES <br />' Date 09/23/97 Matrix Soil <br />' <br /> Concentration (mg/kg) Recovery <br /> Analyte Sample Amount RPD <br /> 1 (##79456) MS MSD I Spiked MS MSD <br /> TPH (gas) 10 000 1 836 1 878 1 2 03 I 90 93 2 3 <br /> Benzene 0 000 0 176 0 172 0 2 1 88 86 2 3 <br /> Toluene 0 000 0 184 0 182 0 2 92 91 1 1 <br /> f Bthylbenzene 0 000 0 178 0 174 0 2 89 87 2 3 <br /> Xylenes 0 000 0 524 0 510 0 6 87 85 2 7 <br /> I <br /> TPH(diesel) 0 271 273 1 300 90 91 0 9 <br /> TRPH I N/A N/A N/A N/A N/A N/A N/A <br /> (oil and grease) <br />' k Rec = (MS - Sample) / amount spiked M 100 <br /> RPD = (MS - MSD) / (MS + MSO) A 2 , 100 <br /> i <br /> I <br /> I - <br /> I <br /> I <br />