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0 <br /> Report Number 30410 <br /> QC Report Matrix Spike/ Matrix Spike Duplicate Date 12/18/2002 <br /> I <br /> Project Name Meyer <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 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 30365-03 <0 50 400 400 409 384 ug/L EPA 8260B 12/16/02 102 959 644 70-130 25 <br /> Toluene 30365-03 <0 50 400 400 394 367 ug/L EPA 8260B 12/16/02 984 91 7 7 08 70-130 25 <br /> Tert-Butanol 30365-03 <50 200 200 201 202 ug/L EPA 8260B 12/16/02 100 101 0 744 70-130 25 <br /> Methyl-t-Butyl Ether 30365-03 13 400 400 555 503 ug/L EPA 82606 12/16/02 106 932 132 70-130 25 <br /> Benzene 30421-02 <0 50 400 400 389 385 ug/L EPA 8260E 12/17/02 972 962 1 03 70-130 25 <br /> Toluene 30421-02 <0 50 400 400 377 371 ug/L EPA 8260E 12/17/02 942 928 1 52 70-130 25 <br /> Tert-Butanol 30421-02 72 200 200 268 265 ug/L EPA 8260B 12/17/02 978 966 125 70-130 25 <br /> Methyl-t-Butyl Ether 30421-02 85 400 400 120 121 ug/L EPA 8260E 12/17/02 864 885 232 70-130 25 <br /> Approved By J6g1 Kift <br /> KIFF ANALYTICAL, LLC I r7 <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 v <br />