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Report Number 35141 <br /> QC Report Matrix Spike/ Matrix Spike Duplicate Date 9/29/2003 <br /> Project Name STEFANO <br /> Project Number <br /> Duplicate Duplicate Spiked <br /> u <br /> p Spiked Spiked Sample Relative <br /> Spike SpikedSpiked 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 35141-01 <0 50 4010 400 338 349 ug/L EPA 8260E 9128103 846 873 317 70-130 25 <br /> Toluene 35141-01 <0 50 400 400 339 368 ug/L EPA 8260B 9128103 84 8 919 801 70-130 25 <br /> Tert-Butanol 35141-01 <5 0 200 200 162 206 ug/L EPA 8260E 9128103 812 103 235 70-130 25 <br /> Methyl-t-Butyl Ether 35141-01 <0 50 400 400 36 0 388 ug/L EPA 82606 9128103 900 970 751 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By J I <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />