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i0 Report Number 400 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date 7/12/2001 <br /> Project Name 2575 Country Club Blvd, <br /> Project 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 20994-01 <0 50 201 19.6 19 0 185 ug1L EPA 8260B 7/1/2001 944 94 7 0 397 70-130 25 <br /> Toluene 20994-01 <0 50 201 196 19 7 19 2 ug/L EPA 8260E 7/1/2001 980 979 0 102 70-130 25 <br /> Tert-Butanol 20994-01 <5 0 101 978 920 838 uglL EPA 82608 7/1/2001 914 85 7 650 70-130 25 <br /> Methyl-t-Butyl Ether 20994-01 <0 50 201 196 206 198 ug/L EPA 82608 7/1/2001 102 101 1 18 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By J I Kill <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />