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Report Number 26390 <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date 5/17/2002 <br /> I <br /> Protect Name Chevron 9-57751301 W <br /> Protect Number 77CH 43452.00.0550 <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 - 26369-01 <0 50 400 400 382 384 ug/L EPA 82608 5115/02 954 961 0 731 70-130 25 <br /> Toluene 26369-01 <0 50 400 400 392 393 ug/L EPA 8260E 5115102 980 983 0 255 70-130 25 <br /> Tert-Butanol 26369-01 <50 200 200 183 188 ug/L EPA 82606 5115102 91 5 93 9 262 70-130 25 <br /> Methyl-t-Butyl Ether26369-01 <0 50 400 400 352 360 ug/L EPA 82608 5115102 881 901 222 70-130 25 <br /> Benzene 26390-03 <0 50 400 400 390 387 ug/L EPA 8260B 5/16102 974 967 0 772 70-130 25 <br /> Toluene 26390-03 <0 50 400 400 374 371 ug/L EPA 82608 5/16102 936 928 0 831 70-130 25 <br /> Tert-Butanol 26390-03 <5 0 200 200 181 190 ug/L EPA 82606 5116102 905 950 481 70-130 25 <br /> Methyl-t-Butyl Ether 26390-03 <0 50 400 400 387 392 ug/L EPA 8260B 5116102 968 98 0 133 70-130 25 <br /> Benzene 26418-01 <0 50 400 400 378 361 ug/L EPA 8260B 5116/02 944 902 4 58 70-130 25 <br /> Toluene 26418-01 <0 50 400 400 382 372 ug/L EPA 8260B 5116102 954 93 0 249 70-130 25 <br /> Tert-Butanol 26418-01 6700 200 200 7000 7030 ug/L EPA 8260B 5116102 149 168 11 9 70-130 25 <br /> Methyl-t Butyl Ether 26418-01 76 400 400 114 101 ug/L EPA 8260B 5116/02 957 636 404 70-130 25 <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />