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Report Number 24178 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 118102 <br /> Project Name FOS Manteca <br /> Project Number 3490 <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 24178-01 <0 50 188 195 162 182 ug/L EPA 8260E 115102 86 3 933 777 70-130 25 <br /> Toluene 24178-01 <0 50 188 195 158 175 ug/L EPA 82608 115102 844 896 606 70-130 25 <br /> Tert-Butanol 241713-01 5 5 939 975 856 89 1 ug/L EPA 8260E 115102 85 3 858 0 624 70-130 25 <br /> Methyl-t-Butyl Ether 24178-01 <0 50 188 195 198 207 ug/L EPA 8260B 115102 106 106 0 661 70-130 25 <br /> Approved By Joel Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive Suite D Davis CA 95616 530-297-4800 <br />