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i <br /> Report Number 28457 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 9113102 <br /> Project Name Ranch Market-Monthly <br /> Project Number 770T 43627.01.0002 <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 28314-09 <0 50 400 400 406 394 ug/L EPA 8260B 9111102 101 986 287 70-130 25 <br /> Toluene 28314-09 <0 50 400 400 461 446 ug/L EPA 8260B 9111102 115 111 342 70-130 25 <br /> Tert Butanol 28314-09 <50 200 200 204 209 ug/L EPA 82606 9111102 102 104 214 70-130 25 <br /> Methyl-t-Butyl Ether 28314-09 40 400 400 79 0 777 ug/L EPA 8260B 9111102 981 950 324 70-130 25 <br /> i <br /> i <br /> i <br /> Approved By J66 KifF <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 VVV <br />