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Report Number 20621 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 06/20/2001 <br /> Protect Name 3725 South Tracy Blvd , <br /> Protect Number 010605-K1 <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 20621-03 <0 50 241 248 236 248 ug/L EPA 8260B 06118120097 8 100 2 30 70-130 25 <br /> Toluene 20621-03 <0 50 241 248 21 8 231 ug1L EPA 8260B 06118120090 2 931 3 12 70-130 25 <br /> Tert-Butanol 20621-03 <5 0 241 248 302 29 5 ug/L EPA 8260B 061181200125 119 503 70-130 25 <br /> Methyl-t-Butyl Ether 20621-03 92 241 248 273 298 ug/L EPA 8260E 06118120075 2 830 9 89 70-130 25 <br /> • <br /> s 1 <br /> Approved By 3 + 1 Kiff I <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 U <br />