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Report Number 18597 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 12/22/00 <br /> Project Name 1071 N MAIN STREET, <br /> Project Number 242-0323 <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 /> Spike Recovery Data <br /> Benzene 18597-27 <0 0050 00480 00479 00439 00440 mg/Kg EPA 8260B 12/19/00 91 6 920 0 436 70-130 25 <br /> Toluene 18597-27 <0 0050 00480 00479 00429 00431 mg/Kg EPA 8260E 12/19/00 894 900 0 580 70-130 25 <br /> Tert-Butanol 18597-27 <0 0050 00480 00479 00400 00455 mg/Kg EPA 8260B 12/19/00 833 950 132 70-130 25 <br /> Methyl-t-Bury! Ether 18597-27 <0 0050 00480 00479 00381 00399 mg/Kg EPA 8260B 12/19/00 794 833 475 70-130 25 <br /> I <br /> i <br /> I <br /> Approved By J' <br /> KIFF ANALYTICAL, LLC el Kill <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 U <br />