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110 2nd Avenue South,#D7,Pacheco,CA 94553 <br /> ' MCC) ANALYTICAL INC Tele 510-798-1620 Fax 510-798-1622 <br /> rt <br /> 1 <br /> ' QC REPORT FOR HYDROCARBON ANALYSES <br /> Date 04/07/98 Matrix AIR <br /> I Concentration (mg/L) I I % Recovery <br /> I Analyte Isample I Amount I RPD <br /> 1 (#87670) MS MSD I Spiked I MS MSD <br /> ' I <br /> TPH (gas) I 0 0 99 4 96 2 I 100 0 I 99 4 96 2 3 3 <br /> Benzene I 0 0 9 9 9 9 I 10 0 I 99 0 99 0 0 0 <br /> Toluene I 0 0 10 2 10 2 I 10 0 1102 0 102 0 0 0 <br /> Ethyl Benzene I 0 0 10 3 10 3 I 10 0 1103 0 103 0 0 0 <br /> Xylenes 0 0 31 2 31 3 I 30 0 1104 0 104 3 0 3 <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) I I <br /> ' V Rec = (MS Sample) / amount spiked x 100 <br /> RPD = (MS - MSD) / (MS + MSD) x 2 x 100 <br />