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Report Number: 66913 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 01/23/2009 <br /> Project Name : Stockton Promenade <br /> Project Number: 7345.09 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dup. Sample Sample Analysis Date Percent Percent Percent Recov. Diff. <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov. Recov. Diff. Limit Limit <br /> TPH as Diesel 66885-01 310 20.0 20.0 539 357 mg/Kg M EPA 8015 1/17/09 162 107 40.7 60-140 25 • <br /> 1,1-Dichloroethane 66858-03 <0.0050 0.0400 0.0400 0.0331 0.0335 mg/Kg EPA 8260B 1/16/09 82.8 83.5 0.884 70-130 25 <br /> 1,2-Dichloroethane 66858-03 <0.0050 0.0397 0.0398 0.0338 0.0340 mg/Kg EPA 8260B 1/16/09 85.0 85.6 0.658 70-130 25 <br /> Benzene 66858-03 <0.0050 0.0387 0.0388 0.0331 0.0332 mg/Kg EPA 8260B 1/16109 85.4 85.6 0.209 70-130 25 <br /> Chlorobenzene 66858-03 <0.0050 0.0392 0.0393 0.0348 0.0347 mg/Kg EPA 8260B 1/16/09 88.8 88.4 0.380 70-130 25 <br /> Methyl-t-butyl ether 66858-03 <0.0050 0.0390 0.0390 0.0322 0.0324 mg/Kg EPA 8260B 1/16/09 82.8 83.1 0.419 70-130 25 <br /> Tert-Butanol 66858-03 <0.0050 0.197 0.197 0.166 0.165 mg/Kg EPA 8260B 1/16/09 84.3 83.6 0.871 70-130 25 <br /> Toluene 66858-03 <0.0050 0.0395 0.0396 0.0340 0.0350 mg/Kg EPA 8260B 1/16/09 86.0 88.5 2.89 70-130 25 <br /> 1,1-Dichloroethane 66913-01 <0.0050 0.0402 0.0399 0.0314 0.0320 mg/Kg EPA 8260B 1/19/09 78.1 80.2 2.61 70-130 25 <br /> 1,2-Dichloroethane 66913-01 <0.0050 0.0399 0.0396 0.0351 0.0347 mg/Kg EPA 8260B 1/19/09 87.9 87.6 0.404 70-130 25 <br /> Benzene 66913-01 <0.0050 0.0390 0.0386 0.0320 0.0318 mg/Kg EPA 8260B 1/19/09 82.0 82.2 0.244 70-130 25 <br /> Chlorobenzene 66913-01 <0.0050 0.0394 0.0391 0.0351 0.0348 mg/Kg EPA 8260B 1/19/09 89.0 88.9 0.134 70-130 25 <br /> Toluene 66913-01 <0.0050 0.0397 0.0394 0.0344 0.0338 mg/Kg EPA 8260B 1/19/09 86.4 85.7 0.876 70-130 25 <br /> Methyl-t-butyl ether 66913-01 <0.0050 0.0392 0.0389 0.0334 0.0301 mg/Kg EPA 82608 1119/09 85.2 77.5 9.48 70-130 25 • <br /> Tert-Butanol 66913-01 <0.0050 0.198 0.197 0.154 0.160 mg/Kg EPA 8260B 1/19/09 77.7 81.5 4.78 70-130 25 <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />