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7 110 2nd Avenue South,#D7,Pacheco,CA 94553 <br />' =McCADMPBELL ANALYTICAL INC. Tele:510-798-1620 Fax 510-798-1622 <br /> • <br />' QC REPORT FOR HYDROCARBON ANALYSES <br />' Date: 07/29/98-07/30/98 Matrix: AIR <br /> tConcentration (mg/L) Recovery <br /> I Analyte Isample I Amount I RPD <br /> 1 (#92752) MS MSD I Spiked I MS MSD <br />' I I i I I <br /> I TPH (gas) 1 0.0 91.6 94 .8 100.0 1 91.6 94.8 3 .4 <br /> 1 Benzene 1 0.0 9.9 9.9 I 10.0 1 99.0 99.0 0.0 1 <br /> 1 Toluene 1 0.0 10.1 10.1 10.0 1 101 .0 101.0 0.0 1 <br /> 1 Ethyl Benzene 1 0.0 10.3 10 .3 10. 0 1103 .0 103 .0 0.0 1 <br />' 1 Xylenes 1 0.0 31.2 31.2 30.0 1104 .0 104.0 0.0 1 <br /> I I <br /> ITPH(diesel) I N/A N/A N/A I N/A 1 N/A N/A N/A 1 <br /> I I I 1 <br /> 1 TRPH I N/A N/A N/A N/A I N/A N/A N/A I <br />' I (oil & grease) I <br /> 1 <br />' g Rec. (MS - Sample) / amount spiked x 100 <br /> RPD (MS - MSD) / (MS + MSD) x 2 x 100 <br /> 1 <br /> i <br /> • <br />