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Report Number 20531 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 6/14/2001 . <br /> Project 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 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 20520-01 <0 50 24 6 24 6 258 259 ug/L EPA 8260B 6/6/2001 105 105 0 171 70-130 25 <br /> Toluene 20520-01 <0 50 246 246 251 253 ug/L EPA 82605 6/6/2001 102 102 0 489 70-130 25 <br /> Tert-Butanol 20520-01 <5 0 24 6 246 262 266 ug/L EPA 8260E 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 82606 6/6!2001 901 89 5 0 666 70-130 25 <br /> Approved By J6el Kiff <br /> KIFF ANALYTICAL, LLC <br /> i <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />