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Report Number 27980 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 8/20/2002 <br /> Protect Name ARC PUMP & WELD <br /> i <br /> Project Number <br /> Duplicate Duplicate Spiked <br /> u <br /> p 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 27979-02 <0 50 399 39 9 399 406 ug/L EPA 8260B 8115102 100 102 1 83 70-130 25 <br /> Toluene 27979-02 <0 50 399 399 398 406 ug/L EPA 82608 8115102 998 102 2 01 70-130 25 <br /> j Tert-Butanol 27979-02 <5 0 200 200 232 205 ug/L EPA 8260B 8115102 116 103 12 2 70-130 25 <br /> i <br /> Methyl-t-Butyl Ether 27979-02 23 39 9 39 9 429 407 ug/L EPA 82608 8115102 102 960 557 70-130 25 <br /> Benzene 27981-02 <0 50 400 400 41 3 408 ug/L EPA 8260E 8113102 103 102 1 32 70-130 25 <br /> Toluene 27981-02 <0 50 400 400 41 6 41 2 ug/L EPA 82608 8113102 104 103 0 942 70-130 25 <br /> Tert-Butanol 27981-02 <5 0 200 200 200 202 ug/L EPA 8260E 8113102 100 101 0 705 70-130 25 <br /> Methyl-t-Butyl Ether 27981-02 61 400 400 45 0 451 ug/L EPA 8260B 8113102 974 976 0 154 70-130 25 <br /> t ' <br /> Approved By Jpel Kiffi <br /> KIFF ANALYTICAL, LLC i <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 ��1 <br />