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Report Number 41442 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 01/07/2005 <br /> Protect Name Former Beacon 12474 <br /> Project Number 1474 47 <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 41442-02 <0 50 39 3 392 385 383 ug/L EPA 8260E 12/14/04 979 977 0 191 70-130 25 <br /> Toluene 41442-02 1 0 393 392 402 396 ug/L EPA 82606 12/14/04 998 984 140 70-130 25 <br /> Tert-Butanol 41442-02 <5 0 196 196 190 183 ug/L EPA 8260E 12/14104 96 6 93 3 346 70-130 25 <br /> Methyl-t-Butyl Ether 41442-02 <0 50 39 3 392 392 399 ug/L EPA 8260E 12/14/04 99 9 102 1 97 70-130 25 <br /> Benzene 41469-09 100 394 382 118 126 ug/L EPA 8260B 12/17/04 44 2 663 399 70-130 25 <br /> Toluene 41469-09 22 394 382 414 390 ug/L EPA 8260B 12117/04 995 966 295 70-130 25 <br /> Tert-Butanol 41469-09 <5 0 197 191 198 184 ug/L EPA 8260B 12/17/04 100 964 428 70-130 25 <br /> Methyl-t-Butyl Ether41469-09 12 394 382 506 474 ug/L EPA 8260E 12/17/04 98 6 934 543 70-130 25 <br /> Benzene 41490-01 <0 50 400 400 439 434 ug/L EPA 8260B 12/17/04 110 108 1 13 70-130 25 <br /> Toluene 41490-01 <0 50 400 400 384 370 ug/L EPA 8260B 12/17/04 96 0 925 368 70-130 25 <br /> Tert-Butanol 41490-01 <50 200 200 192 197 ug/L EPA 8260B 12/17104 96 2 983 219 70-130 25 <br /> Methyl-t-Butyl Ether 41490-01 <0 50 400 400 42 0 33 3 ug/L EPA 8260B 12/17/04 105 83 3 231 70-130 25 <br /> I <br /> I <br /> Approved By Joe Iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />