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! • i - <br /> Report Number 20531 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 6/14/2001 <br /> I <br /> Protect Name 2575 Country Club Blvd, <br /> Protect Number 243-0783-003 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked 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 20520-01 <0 50 24 6 246 258 25 9 uglL EPA 8260B 6/6/2001 105 105 0 171 70-130 25 <br /> Toluene 20520-01 <0 50 24 6 246 251 253 uglL EPA 8260B 6/6/2001 102 102 0 489 70-130 25 <br /> Tert-Butanol 20520-01 <5 0 246 246 262 266 uglL EPA 8260B 6/6/2001 106 108 1 18 70-130 25 <br /> Methyl-t-Butyl Ether 20520-01 35 246 246 575 574 ug/L EPA 8260B 6/6/2001 901 89 5 0 666 70-130 25 <br /> I <br /> Approved By Joel Kiff , I <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 v <br />