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Report Number: 31207 <br /> OC Report : Matrix Spike/Matrix Spike Duplicate Date : 216103 <br /> Project Name: Singh Tracy <br /> Project Number: 3254 <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 31200-02 <0.50 40.0 40.0 41.9 41.5 ug/L EPA 82606 1131103 105 104 1.05 70-130 25 <br /> Toluene 31200-02 X0.50 40.0 40.0 38.7 38.1 ug/L EPA 8260B 1131103 96.7 95.3 1.43 70-130 25 <br /> Tert-Butanol 31200-02 12000 200 200 12100 12100 uglL EPA 8260E 1131103 0.00 "0.00 0.00 70-130 25 <br /> Methyl-t-Butyl Ether 31200=02 0.63 40.0 40.0 39.3 38.7 ug/L EPA 8260B 1/31103 96.6 95.1 1.56 70-130 25 <br /> Benzene 31216-05 11 40.0 40.0 48.4 46.4 uglL EPA 8260B 212103 93.5 88.5 5.49 70-130 25 <br /> Toluene 31216-05 <0.50 40.0 40.0 37.3 36.4 uglL EPA 8260B 212103 93.3 91.1 2.44 70-130 25 <br /> Tert-Butanol 31216-05 13 200 200 204 204 ug/L EPA 8260B 2/2103 95.4 95.5 0.0524 70-130 25 <br /> Methyl-t-Butyl Ether 31216-05 160 40.0 40.0 198 196 uglL EPA 82606 212103 105 98.7 6.42 70-130 25 <br /> i <br /> i <br /> Approved By: Jpel Kiff <br /> KIFF ANALYTICAL, LLC Approved <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />