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Report Number 40 <br /> QC Report • Matrix Spike/Matrix Spike Duplicate Date 12/1/2004 <br /> Project Name 2575 Country Club, <br /> Project Number 0783 <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 /> Benzene 41180-01 <0 0050 00641 00651 00635 00630 mg/Kg EPA 8260B 11/30/04 991 968 239 70-130 25 <br /> Toluene 41180-01 <0 0050 00641 00651 00664 00660 mg/Kg EPA 82608 11/30/04 104 101 2 18 70-130 25 <br /> Methyl-t-Butyl Ether41180-01 <0 0050 00641 00651 00546 00539 mg/Kg EPA 82606 11/30/04 852 828 297 70-130 25 <br /> Approved By Jo Iff <br /> KI FF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />