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� i • <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Report Number: 43757 <br /> Date : 5/14/2005 <br /> Project Name : Sanchez Property <br /> Project Number <br /> Duplicate Duplicate Spiked <br /> p Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> e <br /> Spiked Sample SpikDup. 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 43754-02 <0.50 40.0 40.0 40.3 39.7 ug/L EPA 82608 5114105 101 99.2 1.60 70-130 25 <br /> Toluene 43754-02 <0.50 40.0 40.0 40.6 39.9 ug/L EPA 82608 5114105 101 99.7 1.76 70-130 25 <br /> Tert-Butanol 43754-02 <5.0 200 200 192 194 ug/L EPA 82606 5114105 96.0 96.8 0.923 70-130 25 <br /> Methyl-t-Butyl Ether 43754-02 <0.50 40.0 40.0 36.4 36.2 ug/L EPA 8260B 5114/05 91.0 90.5 0.508 70-130 25 <br /> Y <br /> Affff <br /> KIFF ANALYTICAL, LLC Approved By: Joel <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />