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4r � <br /> r <br /> Report Number: 17891 <br /> Date : 1013100 <br /> QC Report : Matrix Spikel Matrix Spike Duplicate <br /> Project Name : 22373 <br /> Project Number: <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 /> Spike Recovery Data 25 <br /> Benzene 17920-06 <0.50 24.6 23.7 22.3 21.1 uglt EPA 82606 9130!00 90.7 89.1 1.76 70-130 <br /> Toluene 17920-06 <0.50 24.6 23.7 21.9 20.6 ug/L EPA 8260B 9130100 88.9 86.7 2.50 70-130 25 <br /> Tert-Butanol 17920-06 <5.0 24.6 23.7 21.6 21.6 uglL EPA 82608 9130100 85 9 87.1 1.39 70-130 25 <br /> A 8260B 9130/00 87.9 91.2 3.75 70-130 25 <br /> Methyl-t-Butyl Ether 17920-06 <0.50 24.6 23.7 21.1 20.6 ug/L <br /> ~� ice' <br /> Approved By: Joel Kiff l� <br /> KIFF ANALYTICAL, LLC i <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 U <br />