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Report Number 39809 <br /> QC Report Matrix Spikel Matrix Spike Duplicate Date 8/31/2004 <br /> Project Name QUIK STOP 39 <br /> Project Number 7039.45 <br /> i <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 39806-01 <0 50 400 400 401 39 3 ug/L EPA 8260B 8128104 100 982 208 70-130 25 <br /> Toluene 39806-01 <0 50 400 400 381 378 ug/L EPA 8260B 8128104 95 2 946 0 710 70-130 25 <br /> Tert-Butanol 39806-01 <5 0 200 200 201 195 ug/L EPA 82608 8128104 101 976 311 70-130 25 <br /> Methyl-t-Butyl Ether 39806-01 6 1 400 400 437 453 ug/L EPA 8260B 8128104 939 98 0 429 70-130 25 <br /> Benzene 39825-06 <0 50 400 400 450 43 1 ug/L EPA 8260B 8128104 113 108 448 70-130 25 <br /> Toluene 39825-06 <0 50 400 400 408 406 ug/L EPA 8260B 8128104 102 102 0 356 70-130 25 <br /> Tert-Butanol 39825-06 <5 0 200 200 191 190 ug1L EPA 8260B 8128104 956 94 8 0 921 70-130 25 <br /> Methyl-t-Butyl Ether 39825-06 <0 50 40 0 400 38 0 377 ug/L EPA 8260B 8128104 950 943 0 673 70-130 25 <br /> I <br /> I <br /> I <br /> i <br /> I <br /> Approved 8y Joe iff <br /> KIFF ANALYTICAL, LLC <br /> 4 <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />