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� s <br /> Report Number 27762 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 814/2002 <br /> Project Name STEFANOS <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 27724-03 <0 50 199 199 207 208 ug/L EPA 8260B 811102 104 105 0 383 70-130 25 <br /> Toluene 27724-03 <0 50 199 199 204 204 ug/L EPA 82606 811102 103 103 0 292 70-130 25 <br /> Tert-Butanol 27724-03 <5 0 99 3 994 113 114 ug/L EPA 82606 811102 114 114 0 525 70-130 25 <br /> Methyl-t-Butyl Ether 27724-03 <0 50 199 199 196 20 0 ug/L EPA 8260B 811102 98 8 101 198 70-130 25 <br /> Benzene 27740-05 <0 50 400 400 39 5 389 ug/L EPA 82608 8/1/02 988 972 161 70-130 25 <br /> Toluene 27740-05 <0 50 400 400 39 8 388 ug/L EPA 82606 811102 995 971 2 39 70-130 25 <br /> Tert-Butanol 27740-05 <50 200 200 195 196 ug/L EPA 8260B 8/1102 974 979 0 450 70-130 25 <br /> Methyl-t-Butyl Ether 27740-05 <0 50 400 400 400 402 ug/L EPA 82606 811102 999 101 0 723 70-130 25 <br /> Benzene 27733-02 <0 50 400 400 405 400 ug/L EPA 8260B 811102 101 100 107 70-130 25 <br /> Toluene 27733-02 16 400 400 41 3 412 ug/L EPA 8260E 811102 992 991 0126 70-130 25 <br /> Tert-Butanol 27733-02 <5 0 200 200 196 202 ug/L EPA 82606 811102 98 2 101 303 70-130 25 <br /> Methyl-t-Butyl Ether 27733-02 <0 50 400 400 405 413 ug/L EPA 8260B 8/1/02 101 103 191 70-130 25 <br /> I <br /> Approved By ,/ el Kift <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />