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Report Number : 25980 <br /> QC Report . Matrix Spike/Matrix Spike Duplicate Date : 4122102 <br /> Project Name : 341 East Main Street, <br /> Project Number: 020415-BM 1 <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 25980-10 <0.50 40.0 40.0 36.7 36.5 ug/L EPA 82608 4119102 91.6 91.2 0.437 70-130 25 <br /> it <br /> Toluene 25980-10 <0.50 40.0 40.0 37.0 38.0 ug/L EPA 8260E 4119102 92.4 95.1 2.80 70-130 25 <br /> Tert-Butanol 25980-10 <5.0 200 200 193 192 ug/L EPA 8260E 4119102 96.7 96.2 0.565 70-130 25 <br /> 11 <br /> Methyl-t-Butyl Ether 25980-10 <0.50 40.0 40.0 32.7 32.5 ug/L EPA 82608 4119102 81.7 81.2 0.645 70-130 25 <br /> Benzene 25971-01 <0.50 40.0 40.0 42.6 40.8 ug/L EPA 8260E 4119102 106 102 4.22 70-130 25 <br /> Toluene 25971-01 <0.50 40.0 40.0 42.3 41.6 ug/L EPA 8260E 4/19102 106 104 1.84 70-130 25 <br /> Tert-Butanol 25971-01 410 200 200 636 647 ug/L EPA 8260E 4119102 111 116 4.58 70-130 25 <br /> Methyl-t-Butyl Ether 25971-01 <0.50 40.0 40.0 41.2 38.9 ug/L EPA 8260B 4119102 103 97.2 5.87 70-130 25 <br /> Approved By: J I Kiff <br /> KIFF ANA ]CAL, LLC <br /> 720 Olive Drive, Suite Avis, CA 95616 530-297-4800 <br />