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Report Number 32584 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 4/10/2003 <br /> Project Name 2575 Country Club Blvd. <br /> Project Number 245-0783 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relabve <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 32584-04 <0 50 400 400 430 41 7 ugA. EPA 8260E 414103 108 104 309 70-130 25 <br /> Toluene 32584-04 <0 50 400 400 379 384 uglL EPA 82606 414103 946 959 1 28 70-130 25 <br /> Tert-Butanol 32584-04 4300 200 200 4170 4300 uglL EPA 8260B 414103 000 203 200 70-130 25 <br /> Methyl-t-Butyl Ether 32584-04 <0 50 400 400 437 41 8 uglL EPA 8260B 414103 109 104 430 70-130 25 <br /> Benzene 32609-04 <0 50 400 400 40 2 403 uglL EPA 82608 418103 100 101 0 298 70-130 25 <br /> Toluene 32609-04 <0 50 400 400 41 5 41 2 ug/L EPA 8260B 418103 104 103 0 532 70-130 25 <br /> Tert-Butanol 32609-04 <5 0 200 200 211 220 uglL EPA 8260B 418103 105 110 4 47 70-130 25 <br /> Methyl-t-Butyl Ether 32609-04 <0 50 400 400 476 49 2 uglL EPA 8260E 418103 119 123 341 70-130 25 <br /> Benzene 32490-06 3 0 400 400 429 409 uglL EPA 8260B 415103 99 8 947 524 70-130 25 <br /> Toluene 32490-06 3 0 400 400 430 424 uglL EPA 8260B 415103 999 98 4 1 59 70-130 25 <br /> Tert-Butanol 32490-06 <5 0 200 200 203 197 uglL EPA 8260B 415103 101 984 287 70-130 25 <br /> Methyl-t-Butyl Ether 32490-06 053 400 400 41 0 41 2 uglL EPA 8260B 415103 101 102 0 419 70-130 25 <br /> C 1 , <br /> Approved By J I Koff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />