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ReportNumber : 27578 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 7125102 .. <br /> Project Name : 3725 South Tracy <br /> Project Number: 020715-JK-1 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample SampleRelative 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 27591-03 64 114 114 168 167 ug/L EPA 82608 7122102 91.7 90.7 1.07 70-130 25 <br /> Toluene 27591-03 46 114 114 146 144 uglL EPA 82608 7122102 87.4 85.4 2.28 70-130 25 <br /> Tert-Butanol 27591-03 9.7 571 571 538 535 ug/L EPA 82608 7122102 92.6 91.9 0.716 70-130 25 <br /> Methyl-t-Butyl Ether 27591-03 13 114 114 118 120 ug/L EPA 8260B 7122/02 92.1 93.3 1.32 70-130 25 <br /> Benzene 27578-02 <0.50 40.0 40.0 41.8 41.5 ug/L EPA 8260B 7123102 104 104 0.648 70-130 25 <br /> Toluene 27578-02 <0.50 40.0 40.0 42.6 41.9 uglL EPA 8260B 7123102 106 105 1.49 70-130 25 <br /> Tert-Butanol 27578-02 <5.0 200 200 192 188 ug/L EPA 8260E 7/23102 96.2 94.3 1.97 70-130 25 <br /> Methyl-t-Butyl Ether 27578-02 <0.50 40.0 40.0 40.4 40.5 ug/L EPA 8260E 7/23/02 101 101 0.247 70-130 25 <br /> Approved By: J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite DL-4�vis, CA 95616 530-297-4800 ' <br />