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Report Number 28764 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 1011102 <br /> Project Name Beacon <br /> Project Number 3641 Stockton <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 /> Tert-Butanol 28817-03 <5 0 200 200 204 201 ug/L EPA 82606 9129102 102 101 1 31 70-130 25 <br /> Methyl-t-Butyl Ether 28817-03 <0 50 400 400 398 33 1 ug/L EPA 8260B 9129102 996 827 185 70-130 25 <br /> Benzene 28826-06 <0 50 400 400 409 400 ug/L EPA 8260B 9128102 102 100 220 70-130 25 <br /> Toluene 28826-06 <0 50 400 400 390 381 ug/L EPA 8260B 9128102 974 952 2 34 70-130 25 <br /> Tert-Butanol 28826-06 <50 200 200 206 214 ug/L EPA 8260E 9128102 103 107 380 70-130 25 <br /> Methyl-t-Butyl Ether 28826-06 <0 50 400 400 430 421 ug/L EPA 8260B 9128102 108 105 211 70-130 25 <br /> i <br /> Approved By Jbel Kiff <br /> KIFF ANALYTICAL, LLC <br /> I ) <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 V <br />