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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 02/28/97 Matr3-x Air <br /> Concentration (mg/L)' j % Recovery i <br /> Analyte Sample Amount RPD <br /> (##73871) MS MSD Spiked MS MSD <br /> TPH (gas) 0 0 102 4 103 0 I 100 0 1102 4 103 0 0 6 <br /> ' Benzene j 0 0 9 8 9 8 ! 10 0 98 0 98 0 0 0 <br /> Toluene 0 0 10 2 10 0 10 0 102 0 100 0 2 0 <br /> Ethyl Benzene I 0 0 10 5 10 4 I 10 0 105 0 104 0 1 0 <br /> Xylenes 0 0 31 5 31 2 I 30 0 1105 0 104 0 1 0 <br /> • ITPH (diesel) 0 133 129 150 89 86 3 2 <br /> ' I 4 <br /> TRPH I N/A N/A N/A j N/A N/A N/A N/A <br /> (oil & grease) <br /> 1 Rec = (MS - Sample) / amount spiked x 100 <br /> RPD (MS - MSD) / (MS + MSD) x 2 x 100 <br /> 1 <br /> • <br />