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Report Number 36403 <br /> QC Report Matrix Spike] Matrix Spike Duplicate Date 1212312003 <br /> Protect Name ARC Pump & Welding <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 Rocov Recov Diff Limit Limit <br /> Benzene 36404-01 <0 50 39 9 399 37 2 372 ug/L EPA 8260B 12/22/03 93 3 931 0 188 70-130 25 <br /> Toluene 36404-01 <0 50 399 39 9 361 36 5 ug/L EPA 8260B 12/22/03 90 4 91 5 1 21 70-130 25 <br /> Tert-Butanol 36404-01 64 200 200 195 199 ug/L PPA 8260B 12/22/03 94 3 96 7 251 70-130 25 <br /> Methyl-t-Butyl Ether 36404-01 <0 50 399 39 9 371 360 ug/L EPA 8260B 12/22/03 929 90 1 300 70-130 25 <br /> I <br /> Benzene 36393-05 <0 50 399 399 376 381 ug/L EPA 8260B 12/23/03 942 95 5 1 32 70-130 25 <br /> Toluene 36393-05 <0 50 399 39 9 367 370 ug/L EPA 8260B 12123/03 91 9 926 0 786 70-130 25 <br /> Tert-Butanol 36393-05 13 200 200 191 195 ug/L EPA 8260B 12/23/03 89 2 908 1 78 70-130 25 <br /> Methyl-t-Butyl Ether 36393-05 <0 50 399 399 400 395 ugll- EPA 8260E 12/23/03 100 990 1 18 70-130 25 <br /> I <br /> 4 <br /> I � <br /> O <br /> w, <br /> Approved By R P Furry— <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St Suite 300 Daws, CA 95616 530-297-4800 <br />