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Report Number 42716 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 3114/2005 <br /> Protect Name ARC Pump + Welding <br /> Project Number <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 Analysts Date Percent Percent Percent Recov Diff <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Benzene 42716-02 230 399 39 8 250 232 ug/L EPA 8260B 3110/05 421 000 200 70-130 25 <br /> Toluene 42716-02 34 399 39 8 46 0 449 uglL EPA 82606 3/10105 107 104 2 39 70-130 25 <br /> Tert-Butanol 42716-02 <50 200 199 203 199 uglL EPA 8260B 3110!05 102 100 165 70-130 25 <br /> Methyl-t-Butyl Ether42716-02 1 5 399 39 8 392 372 ug/L EPA 8260E 3110105 944 89 5 523 70-130 25 <br /> Benzene 42734-10 <0 50 400 400 393 38 3 ug/L EPA 8260B 3111105 982 958 249 70-130 25 <br /> Toluene 42734-10 1 1 400 400 412 39 9 uglL EPA 82608 3111105 100 969 342 70-130 25 <br /> Tert-Butanol 42734-10 <50 200 200 183 180 uglL EPA 8260E 3111105 91 3 898 1 65 70-130 25 <br /> Methyl-t-Butyl Ether42734-10 <0 50 400 400 374 365 uglL EPA 82608 3111105 935 91 3 238 70-130 25 <br /> Approved By Jo iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />