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Report Number A <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date 216/2002 <br /> Project Name 2575 COUNTRY CLUB, <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 24556-02 <0 50 197 201 173 200 ug1L EPA 8260B 11311200287 5 99 6 129 70-130 25 <br /> Toluene 24556-02 <0 50 197 201 172 200 ug/L EPA 8260E 11311200287 2 994 131 70-130 25 <br /> Tert-Butanol 24556-02 <5 0 98 7 101 96 2 964 uglL EPA 82608 11311200297 4 958 171 70-130 25 <br /> Methyl-t-Butyl Ether 24556-02 <0 50 197 201 182 196 uglL EPA 8260E 11311200292 4 97 6 5 55 70-130 25 <br /> Benzene 24530-15 2 7 400 400 420 420 uglL EPA 8260E 11311200298 3 982 00509 70-130 25 <br /> Toluene 24530-15 6 9 400 400 456 45 5 uglL EPA 82608 11311200296 8 964 0 388 70-130 25 <br /> Tert-Butanol 24530-15 <5 0 200 200 199 177 uglL EPA 8260B 11311200299 5 886 116 70-130 25 <br /> Methyl-t-Butyl Ether 24530-15 0 61 400 400 372 363 uglL EPA 82608 1131/2002915 89 2 2 60 70-130 25 <br /> Approved By J I stiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />