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Report Number 20429 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 6/7/2001 <br /> Project Name 420 W Kettleman Lane, <br /> Protect Number 010523-L2 <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 LimitLimit <br /> Spike Recovery Data <br /> Benzene 20421-01 <0 50 248 248 244 254 ug/L EPA 8260B 6/4/2001 98 4 102 4 14 70-130 25 <br /> Toluene 2042,1-01 <0 50 248 248 232 239 ug/L EPA 8260B 6/4/2001 93 3 96 4 3 35 70-130 25 <br /> 7ert-Butanol 2042,1-01 <5 0 24 8 248 263 258 ug/L EPA 8260E 6/4/2001 106 104 2 00 70-130 25 <br /> Methyl-t-Butyl Ether 20421-01 4 1 248 248 28 6 301 ug/L EPA 82606 6/4/2001 988 104 566 70-130 25 <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D CA 95616 530-297-4800 <br />