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• 0 <br /> Report Number 29822 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 11/20/2002 <br /> Project Name Haworth <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 Duo 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 29831-02 <0 50 400 400 429 420 ug/L EPA 8260B 11/19/02 107 105 214 70-130 25 <br /> Toluene 29831-02 <0 50 400 400 444 433 ug/L EPA 82606 11/19/02 111 108 233 70-130 25 <br /> Tert-Butanol 29831-02 <5 0 200 200 205 203 ug/L EPA 8260B 11/19/02 103 102 0 949 70-130 25 <br /> Methyl-t-Butyl Ether 29831-02 97 400 400 141 139 ug/L EPA 8260B 11/19/02 110 105 474 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By I Joel Kill <br /> I <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 �! <br />