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s <br /> Report Number: 44795 # <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date : 7/22/2005 <br /> Project Name : Tesoro #67080 <br /> Project Number: D003-007 <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 /> Benzene 44812-01 <0.50 40.0 40.0 41.3 40.2 ug/L EPA 82608 7121105 103 101 2.53 70-130 25 <br /> Toluene 44812-01 <0.50 40.0 40.0 39.8 38.9 ug/L EPA 82608 7121105 99.6 97.3 2.28 70-130 25 <br /> Tert-Butanol 44812-01 <5.0 200 200 210 209 ug/L EPA 8260B 7121105 105 104 0.910 70-130 25 <br /> Methyl-t-Butyl Ether44812-01 0.71 40.0 40.0 38.1 37.6 ug/L EPA 82608 7/21105 93.5 92.2 1.39 70-130 25 <br /> Benzene 44795-02 <0.50 40.0 40.0 41.1 39.9 ug/L EPA 82608 7121105 103 99.8 2.95 70-130 25 <br /> Toluene 44795-02 <0.50 40.0 40.0 38.8 38.2 ug/L EPA 8260B 7/21/05 97.1 95.4 1.76 70-130 25 j <br /> Tert-Butanol 44795-02 8.0 200 200 209 213 ug/L EPA 8260B 7/29/05 100 103 2.27 70-130 25 <br /> Methyl-t-Butyl Ether 44795-02 0.99 40.0 40.0 41.7 41.2 ug/L EPA 8260B 7/21105 102 101 1.19 70.130 25 <br /> i <br /> Approved By: Joe iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />