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i • • ia <br /> 1 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Report Number 33918 <br /> Date 7/10/2003 <br /> Project Name Beacon <br /> Project Number 3641 Stockton <br /> Duplicate Duplicate Spiked <br /> Spike Spiked Spiked <br /> A Spiked Spiked Sample Relative <br /> 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 Anal zed Recov <br /> RecLimit <br /> Tert-Butanol 34027-04 <5 0 200 200 209 213 ug/L EPA 8260B 719103 104 107ov 203 <br /> 70-130 25 it <br /> Methyl-t-Butyl Ether 34027-04 310 400 400 332 328 ug/L EPA 8260B 719103 479 367 264 70-130 25 <br /> I <br /> I <br /> I <br /> I <br /> KIFF ANALYTICAL, LLC Approved By J 1 Kiff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />