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Report Number 40455 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 10/13/2004 <br /> Project Name EZ Serve #100966 <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 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 40455-01 <0 50 400 400 36 5 351 ug/L EPA 8260B 1018104 91 2 87 8 370 70-130 25 <br /> Toluene 40455-01 <0 50 400 400 384 37 5 ug/L EPA 8260B 1018104 960 937 240 70-130 25 <br /> Tert-Butanol 40455-01 <5 0 200 200 204 202 ug/L EPA 8260B 10!8104 102 101 1 37 70-130 25 <br /> Methyl-t-Butyl Ether40455-01 31 400 400 672 660 ug/L EPA 8260B 1018104 91 3 886 308 70-130 25 <br /> Benzene 40490-01 0 86 400 400 387 380 ug/L EPA 82606 1019104 94 7 928 2 02 70-130 25 <br /> Toluene 40490-01 1 4 400 400 408 404 ug/L EPA 82606 1019104 986 974 114 70-130 25 <br /> Tert-Butanol 40490-01 35 200 200 244 250 ug/L EPA 82606 1019104 104 107 2 84 70-130 25 <br /> Methyl-t-Butyl Ether 40490-01 8 0 400 400 444 444 ug/L EPA 8260B 1019!04 909 908 00201 70-130 25 <br /> Benzene 40535-02 <0 50 400 400 398 38 0 ug/L EPA 8260B 10/12/04 995 951 454 70-130 25 <br /> Toluene 40535-02 <0 50 400 400 41 6 400 ug/L EPA 8260B 10/12/04 104 999 408 70-130 25 <br /> Tert-Butanol 40535-02 <50 200 200 216 217 ug/L EPA 8260B 10/12/04 108 108 0 285 70-130 25 <br /> Methyl-t-Butyl Ether40535-02 <0 50 400 400 366 360 ug/L EPA 82608 10/12/04 91 5 900 1 64 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By Jo iff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />