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4 Report Number 26407 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 5123102 <br /> Project Name HAWORTH <br /> Protect Number 3490 <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 26407-02 <0 50 400 400 379 363 ug1L EPA 8260B 5116102 946 907 426 70-130 25 <br /> Toluene 26407-02 <0 50 400 400 385 370 ug/L EPA 8260B 5116102 964 924 413 70-130 25 <br /> Tert-Butanol 26407-02 <5 0 200 200 199 185 ug/L EPA 8260B 5116/02 994 923 742 70-130 25 <br /> Methyl-t-Butyl Ether 26407-02 120 400 400 162 161 ug1L EPA 82606 5116102 101 968 390 70-130 25 <br /> i <br /> Benzene 26407-01 <0 50 400 400 388 370 ug/L EPA 8260B 5116102 970 925 467 70-130 25 <br /> Toluene 26407-01 <0 50 400 400 382 364 ug/L EPA 8260B 5116102 956 909 507 70-130 25 <br /> Tert-Butanol 26407-01 <5 0 200 200 187 183 ug/L EPA 8260B 5116102 934 914 215 70-130 25 <br /> Methyl-t-Butyl Ether 26407-01 300 400 400 343 337 ug/L EPA 8260B 5116102 107 908 167 70-130 25 <br /> I <br /> Approved By J .l Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis,CA 95616 530-297-4800 <br />