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110 2nd Avenue South, #D7,Pacheco,CA 94553 <br /> McCAMPBELL ANALYTICAL INC Tele 510-798-1620 Fax 510-798-16222 <br /> 1 <br /> QC REPORT FOR HYDROCARBON ANALYSES <br /> ' Date 09/23/97-09/24/97 Matrix AIR <br /> ' I I Concentration (mg/L) I % Recovery <br /> Analyte I Sample I Amount I RPD <br /> I# (80990) MS MSD I Spiked I MS MSD <br /> TPH (gas) I 0 0 98 4 97 5 I 100 0 I 98 4 97 5 0 9 <br /> ' I Benzene I 0 0 11 0 9 8 I 10 0 1110 0 98 0 11 5 <br /> Toluene I 0 0 11 1 9 9 I 10 0 1111 0 99 0 11 4 <br /> Ethyl Benzene I 0 0 11 1 9 9 I 10 0 1111 0 99 0 11 4 <br /> Xylenes I 0 0 33 6 29 7 I 30 0 1112 0 99 0 12 3 <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 <br /> TRPH I N/A N/A N/A I N/A I N/A N/A N/A <br /> (oil & grease) <br /> ' Rec = (MS - Sample) / amount spiked x 100 <br /> RPD = (MS - MSD) / (MS + MSD) x 2 x 100 f <br /> 1 <br />