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Report Number 26859 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 6/14/2002 <br /> Protect Name Chevron 9-57751301 W <br /> Project Number 77CH 43452.00.0556 <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 26855-02 <0 50 400 400 418 403 ug/L EPA 8260B 6111102 104 101 370 70-130 25 <br /> Toluene 26855-02 <0 50 400 400 372 38 0 ug/L EPA 8260E 6111102 931 95 0 1 94 70-130 25 <br /> Tert-Butanol 26855-02 <5 0 200 200 211 204 ug/L EPA 8260B 6111102 106 102 3 52 70-130 25 <br /> Methyl-t-Butyl Ether 26855-02 <0 50 400 400 388 38 2 ug/L EPA 82606 6111102 970 95 5 1 56 70-130 25 <br /> Benzene 26806-03 <0 50 400 400 408 398 ug1L EPA 8260E 6113102 102 996 2 53 70-130 25 <br /> Toluene 26806-03 <0 50 400 400 410 402 ug/L EPA 8260B 6113102 103 100 212 70-130 25 <br /> Tert-Butanol 26806-03 <5 0 200 200 194 196 ug/L EPA 82606 6113102 969 981 121 70-130 25 <br /> Methyl-t-Butyl Ether 26806-03 38 400 400 41 1 402 ug/L EPA 8260E 6113102 932 909 244 70-130 25 <br /> Benzene 26827-02 <0 50 400 400 41 0 403 ug/L EPA 8260E 6111102 102 101 1 65 70-130 25 <br /> Toluene 26827-02 <0 50 400 400 378 369 ug/L EPA 8260B 6111102 94 6 92 3 2 41 70-130 25 <br /> Tert-Butanol 26827-02 <5 0 200 200 207 200 ug1L EPA 8260B 6111102 103 999 333 70-130 25 <br /> Methyl-t-Butyl Ether 26827-02 055 400 400 359 36 2 ug/L EPA 82606 6111102 88 5 890 0 592 70-130 25 <br /> I <br /> Approved By J8el Kiff <br /> K1FF ANALYTICAL, LLC I <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 U <br />