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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 /> DupDuplicate Spiked Spiked <br /> date Same le Relative <br /> Spike Spiked Sppked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike DUD 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 18597-03 <0 50 445 247 43 4 24 4 ug/L EPA 8260B 12/17/00 976 98 7 1 18 70-130 25 <br /> Toluene 18597-03 <0 50 445 24 7 403 227 ug/L EPA 8260B 12/17/00 907 91 8 1 25 70-130 25 <br /> Tert-Butanol 18597-03 <5 0 445 24 7 50 2 29 6 ug/L EPA 8260B 12/17/00 113 120 5 80 70-130 25 <br /> Methyl-t-Butyl Ether 18597-03 <0 50 445 247 471 257 ug/L EPA 82608 12/17/00 106 104 164 70-130 25 <br /> Approved By Joel Kiff <br /> KIFF ANALYTICAL, LLC I <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />