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� D <br /> QC Report: Matrix Spike!Matrix Spike Duplicate Ralport Number 25748 <br /> Date 04/08/2002 <br /> Project Name 2575 Country Club, <br /> Project Number. 244.0783 <br /> Duplicate Duplicate Spiked <br /> 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 Anal ed Recov Recov Diff Limit Limit <br /> Benzene 25746-04 <0.50 20 0 20.0 183 182 ug/L EPA 8260E 414102 913 912 0110 70-130 25 <br /> Toluene 25746-04 <0 50 20.0 200 188 188 ug/L EPA 82608 414102 941 94 4 0 239 70-130 25 <br /> Tert-Butanol 25746-04 71 100 99.9 153 149 ug/L EPA 82608 414102 82.3 78 5 476 70-130 25 <br /> Methyl-t-Butyl Ether 25746-04 6 0 200 200 263 25.7 ug/L EPA 82608 414102 102 986 2 96 70-130 25 <br /> Benzene 25746-02 <0 50 400 400 389 38 5 ug/L EPA 8260B 412102 973 96 2 1 08 70-130 25 <br /> Toluene 25746-02 <0 50 400 400 361 359 ug/L EPA 8260E 412102 904 898 0 555 70-130 25 <br /> Tert-Butanol 25746-02 6400 200 200 11500 10200 ug/L EPA 82608 4/2102 2580 1890 30 7 70-130 25 <br /> Methyl-t-Butyl Ether 25746-02 48000 400 400 7360 6740 ug/L EPA 82608 412102 000 000 000 70-130 25 <br /> KIFF ANApproved By J I Kiff <br /> ICAL, LLC <br /> 720 Olive Dr{ e, Suite L vis, CA 95616 530-297-4800 II <br />