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110 2nd Avenue South, #D7, Pacheco, CA 94553 <br /> MrCAMPBhLL ANALYTICAL INC. Tele 510-798-1620 Fax 510-798-1622 <br /> ' QC REPORT <br /> ' Date: 12/23-12/26/91 Matrix: soil <br /> Concentration (mg/kg) % Recovery <br /> ' Analyte Amount RPD <br /> Sample MS MSD Spiked MS MSD <br /> TPH (gas) 0.00 1.89 1.69 2.03 93 83 11.2 <br /> Benzene 0.00 0.2 0.198 0.2 100 99 1.0 <br /> Toluene 0.00 0.2 0.198 0.2 100 99 1.0 <br /> Ethyl Benzene 0.00 0.2 0.196 0.2 100 98 2.0 <br /> Xylenes 0.00 0.602 0.596 0.6 100 99 1.0 <br />' TPH (diesel) 0 146.4 159.3 150 98 106 8.5 <br /> TRPH N/A N/A N/A N/A N/A N/A N/A <br /> (oil & grease) <br />' % Rec = (MS - Sampte) / amount spiked x 100 <br />' RPD = (MS - MSD) / (MS + MSD) x 2 x 100 <br />