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Report Number 33407 <br /> QC Report . Matrix Spike/Matrix Spike Duplicate Date 6/10/2003 <br /> I <br /> Project Name 620 W. Charter Way, <br /> Project Number 030529-JB-2 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike DUD Sample Sample Analysis Date Percent Percent Percent Recov Diff <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov RecovP Diff Limit Limit <br /> Benzene 33411-03 54 39 9 398 946 942 ug/L EPA 8260B 613103 100 998 0 645 70-130 25 <br /> Toluene 33411-03 5 0 399 39 8 461 454 ug/L EPA 8260B 613103 103 102 129 70-130 25 <br /> Tert-Butanol 33411-03 <50 200 199 205 195 ug/L EPA 82606 613103 103 981 451 70-130 25 <br /> Methyl-t-Butyl Ether 33411-03 <0 50 399 398 392 406 ug/L EPA 82606 613103 983 102 382 70-130 25 <br /> Benzene 33385-02 064 400 400 373 361 ug/L EPA 82606 612103 916 886 330 70-130 25 <br /> Toluene 33385-02 <0 50 400 400 416 421 uglL EPA 82606 612103 104 105 129 70-130 25 <br /> Tert-Butanol 33385-02 <5 0 200 200 196 198 uglL EPA 8260E 6/2103 981 992 111 70-130 25 <br /> Methyl-t-Butyl Ether 33385-02 <0 50 400 400 36 8 35 5 uglL EPA 8260B 612103 920 88 6 374 70-130 25 <br /> i <br /> Approved By J I Kiff <br /> • KIFF AN ICAL, LLC • ` <br /> 2795 2nd St; Suite 3003vis, CA 95616 530-2974800 <br />