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, <br /> Report Number 22928 <br /> QC Report Matrix Spike/Matnx Spike Duplicate Date 10/22/01 <br /> Project Name 420 W. Kettleman Lane, <br /> Project Number 011017-Q1 <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 22928-04 <0 50 193 191 192 19 3 ug/L EPA 8260E 10/20/01 991 101 175 70-130 25 <br /> Toluene 22928-04 <0 50 193 191 191 191 ug/L EPA 8260B 10/20/01 988 99 9 1 16 70-130 25 <br /> Tert-Butanol 22928-04 <5 0 966 957 102 102 ug/L EPA 8260B 10/20/01 106 106 0 490 70-130 25 <br /> Methyl-t-Butyl Ether 22928-04 <0 50 193 191 172 169 ug/L EPA 8260B 10/20/01 888 88 2 0 678 70-130 25 <br /> I <br /> , <br /> I <br /> i <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite evis, CA 95616 530-297-4800 <br /> i <br />