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i <br /> 110 2nd Avenue South,#D7,Pacheco,CA 94553 <br /> McCAMPBELL ANALYTICAL INC Tele 510-798-1620 Fax 510-798-1622 <br /> • <br /> QC REPORT FOR HYDROCARBON ANALYSES <br /> Date 10/23/97-10/24/97 Matrix Air <br /> Concentration (mg/L) Recovery <br /> Analyte Sample Amount RPD <br /> 1#(82055) MS MSA Spiked I MS MSD <br /> TPH (gas) I 0 0 101 9 97 9 I 100 0 1101 9 97 9 4 0 <br /> Benzene I 0 0 10 5 10 2 I 10 0 1105 0 102 0 2 9 <br /> Toluene 0 0 10 6 10 3 I 10 0 1106 0 103 0 2 9 <br /> Ethyl Benzene I 0 0 10 7 10 4 I 10 0 1107 0 104 0 2 8 <br /> Xylenes 0 0 32 3 31 3 I 30 0 1107 7 104 3 3 1 <br /> ITPH(diesel) I N/A N/A N/A I N/A N/A N/A N/A <br /> TRPH N/A N/A N/A I N/A N/A N/A N/A <br /> (oil & grease) <br /> I h <br /> Rec = (MS Sample) / amount spiked x 100 <br /> ' RPD = (MS MSD) / (MS + MSD) x 2 x 100 <br />