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i • i <br /> Report Number 31002 <br /> QC Report Matrix Spike/ Matrix Spike Duplicate Date 1/22/2003 <br /> Project Name Robles <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 31019-03 <0 50 400 400 432 431 ug/L EPA 82608 1121103 108 108 0 324 70-130 25 <br /> Toluene 31019-03 <0 50 400 400 414 41 2 ug/L EPA 82606 1121103 103 103 0 388 70-130 25 <br /> Tert-Butanol 31019-03 <50 200 200 217 213 ug/L EPA 82606 1121103 108 106 191 70-130 25 <br /> Methyl-t-Butyl Ether 31019-03 34 400 400 459 460 ug/L EPA 82608 1121103 106 106 0 212 70-130 25 <br /> Benzene 31007-03 <0 50 400 400 39 9 379 ug/L EPA 8260B 1121103 996 948 4 96 70-130 25 <br /> Toluene 31007-03 <0 50 400 400 41 0 381 ug/L EPA 8260B 1121103 102 953 726 70-130 25 <br /> Tert-Butanol 31007-03 <5 0 200 200 183 189 ug/L EPA 8260B 1121103 917 944 2 90 70-130 25 <br /> Methyl-t-Butyl Ether 31007-03 <0 50 400 400 41 0 415 ug/L EPA 82606 1/21103 102 104 121 70-130 25 <br /> Approved By Jppl Kiff <br /> KIFF ANALYTICAL, LLC E4 1 <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 vE <br />