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Report Number 23143 <br /> 11 <br /> QC Report . Matrix Spike/Matrix Spike Duplicate Date 11/14/2001 <br /> Project Name 2575 Country Club, <br /> Project Number 011030-JK-1 <br /> Duplicate Spiked <br /> Duplicate Spiked SpikedSample 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 II Diff Limit Limit <br /> Spike Recovery Data <br /> Benzene 23143-05 <0 50 400 400 410 405 ug/L EPA 8260E 111512001102 101 1 20 70-130 25 <br /> Toluene 23143-05 <0 50 400 400 414 408 ug/L EPA 8260B 111512001103 102 1 36 70-130 25 <br /> Tert-Butanol 23143-05 <5 0 200 200 196 200 ug1L EPA 8260B 11151200198 2 100 1 86 70-130 25 <br /> Methyl-t-B utyl Ether 23143-05 72 400 400 496 496 ug/L EPA 8260B 111512001106 106 00943 70-130 25 <br /> I <br /> KIFF ANAApproved By J I Kiff <br /> L ICAL, LLC <br /> • 720 Olive Drive, Suite D ss, CA 95616 530-297-4800 <br /> 11 11 <br />