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110 2nd Avenue South, #D7,Pacheco,CA 94553 <br />' McCAMPBELL ANALYTICAL INC. Tele:510-798-1620 Ra:510-798-1622 <br /> QC REPORT FOR HYDROCARBON ANALYSES <br />' Date: 10/28/98-10/29/98 Matrix: AIR <br />' I Concentration (mg/L) I I % Recovery <br /> I Analyte ISample I Amount I RPD <br /> I 1 (#97577) MS MSD I Spiked I MS MSD <br /> t I I I I <br /> I TPH (gas) I 0.0 93.9 93.1 I 100. 0 I 93.9 93.1 0 .8 <br />' I Benzene I 0.0 9.7 9.8 I 10.0 I 97.0 98.0 1.0 <br /> I Toluene I 0.0 9.9 10.1 I 10. 0 I 99.0 101.0 2 .0 <br /> I Ethyl Benzene I 0.0 10.1 10.1 I 10.0 1101.0 101.0 0 .0 <br />' I Xylenes I 0.0 30.5 30 .8 I 30.0 1101.7 102.7 1 .0 <br /> ! I I I <br /> . ITPH(diesel) I N/A N/A N/A I N/A I N/A N/A N/A <br /> I I I I I <br /> I TRPH I N/A N/A N/A I N/A I N/A N/A N/A I <br /> (oil & grease) <br />' % Rec. (MS - Sample) / amount spiked x 100 <br /> RPD (MS - MSD) / (MS + MSD) x 2 X 100 <br /> 1 <br /> 1 <br />