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i <br /> Report Number 22065 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 9/20/2001 <br /> Project Name 2494 Fremont Street, <br /> Project Number 010830-C2 <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 Analysts 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 22103-04 <0 50 400 400 39 4 401 ug/L EPA 8260B 9/7/2001 984 100 1 96 70-130 25 <br /> Toluene 22103-04 <0 50 400 400 394 382 ug/L EPA 82606 9/7/2001 98 6 95 6 309 70-130 25 <br /> Tert-Butanol 22103-04 <50 200 200 210 205 ug/L EPA 8260B 917!2001 105 103 2 14 70-130 25 <br /> Methyl-t-Butyl Ether 22103-04 <0 50 400 400 349 373 ug/L EPA 82606 9/7/2001 87 2 93 2 662 70-130 25 <br /> —�� Q <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-2974800 <br />