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Report Number: 26175 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 519102 <br /> Project Name : Singh-Tracy <br /> Project Number: 3254 <br /> f� <br /> Duplicate Spiked Spiked to Same a 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 26164-09 <0.50 19.0 20.0 19.0 19.8 uglL EPA 8260B 515102 100 99.2 0.928 70-130 25 <br /> Toluene 26164-09 <0.50 19.0 20.0 18.4 19.4 ug/L EPA 82606 5/5102 97.2 97.4 0.180 70-130 25 <br /> Tert-Butanol 26164-09 <5.0 94.8 99.8 85.1 89.9 ug/L EPA 8260B 5/5102 89.8 90.1 0.295 70-130 25 <br /> Methyl-t-Butyl Ether 26164-09 <0.50 19.0 20.0 18.7 20.3 ug/L EPA 82608 515102 98.9 102 2.84 70-130 25 <br /> Benzene 26175-03 <0.50 40.0 40.0 40.3 40.0 ug/L EPA 82606 5/3/02 101 100 0.722 70-130 25 <br /> Toluene 26175-03 <0.50 40.0 40.0 43.1 43.0 ug/L EPA 8260B 513/02 108 108 0.279 70-130 25 <br /> Tert-Butanol 26175-03 <5.0 200 200 214 218 ug/L EPA 8260B 5/3102 107 109 1.80 70-130 25 <br /> Methyl-t-Butyl Ether26175-03 <0.50 40.0 40.0 36.4 36.0 ug/L EPA 82606 513/02 91.0 90.0 1.13 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By: J'y Kiff <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br /> w <br />