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0 Report Number 290 <br /> z <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 10/23/02 <br /> ., <br /> Project Name 7910 Lower Sacramento <br /> Project Number 244-0832 <br /> Duplicate Spiked <br /> Duplicate SpikedSpiked 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 /> Benzene 29227-06 <0 0050 00806 00806 00794 0 0779 mg/Kg EPA 82608 10/20/02 98 4 966 182 70-130 25 <br /> Toluene 29227-06 <0 0050 00806 00806 00788 00762 mg/Kg EPA 8260E 10/20/02 97 7 94 5 333 70-130 25 <br /> Tert-Butanol 29227-06 <0 0050 0 403 0 403 0 365 0 354 mg/Kg EPA 82606 10/20102 906 <br /> 877 320 70-130 25 <br /> Methyl-t-Butyl Ether 29227-06 <0 0050 00806 00806 00795 00782 mg/Kg EPA 82608 10/20/02 98 6 969 166 70-130 25 <br /> Benzene 29229-07 <0 50 400 400 414 410 ug/L EPA 8260B 10/20/02 103 102 107 70-130 25 <br /> t Toluene 29229-07 <0 50 400 400 41 1 408 ug/L EPA 8260E 10/20/02 103 102 0 683 70-130 25 <br /> Tert-Butanol 29229-07 <5 0 200 200 199 200 uglL EPA 8260B 10/20/02 995 100 0 571 70-130 25 <br /> Methyl-t-Butyl Ether 29229-07 <0 50 400 400 39 9 397 ug/L EPA 82608 10/20/02 998 99 3 0 502 70-130 25 <br /> I <br /> I <br /> Approved By J l Kiff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />