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0 0 Report Number 260 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date 5/1/2002 <br /> Project Name 2575 Country Club Blvd. <br /> Project Number 2440783-003 <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 knits Method Analyzed Recov Recov Diff Limit Limit <br /> Benzene 26043-02 <0 50 198 19 7 196 192 ug/L EPA 82606 4125102 990 976 142 70-130 25 <br /> Toluene 26043-02 <0 50 198 19 7 189 185 ug/L EPA 8260E 4125102 95 3 941 127 70-130 25 <br /> Tera Butanol 26043-02 <5 0 99.2 983 915 94 2 ug/L EPA 82606 4/25102 922 958 387 70-130 25 <br /> Methyl-t-Butyl Ether 26043-02 28 198 197 20 2 19 8 ug/L EPA 8260E 4/25102 875 86 2 153 70-130 25 <br /> Benzene 26078-04 <0 50 400 400 375 375 ug/L EPA 82608 4/26/02 938 937 00800 70-130 25 <br /> Toluene 26078-04 <0 50 400 400 385 381 ug/L EPA 8260E 4126102 96 2 95 2 1 12 70-130 25 <br /> Tert-Butanol 26078-04 <5 0 200 200 196 192 ug/L EPA 82606 4126102 982 961 215 70-130 25 <br /> Methyl-t-Butyl Ether 26078-04 10 400 400 370 367 ug/L EPA 8260B 4126102 899 891 0 866 70-130 25 <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />