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! i <br /> Report Number 30411 <br /> i <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 12/24/2002 , <br /> Project Name CASSIDY <br /> Project 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 30495-01 68 400 40 1 447 448 ug1L EPA 8260B 12/20/02 946 948 0 221 70-130 25 <br /> Toluene 30495-01 6 0 400 401 426 425 ug/L EPA 8260E 12/20/02 914 91 0 0 488 70-130 25 <br /> Tert-Butanol 30495-01 640 200 200 791 848 ug/L EPA 8260B 12/20/02 728 101 324 70-130 25 <br /> Methyl-t-Butyl Ether 30495-01 120 400 401 151 151 ug/L EPA 8260B 12/20/02 891 889 0 193 70-130 25 <br /> Benzene 30365-03 <0 50 400 400 409 384 ug1L EPA 8260B 12/16/02 102 959 644 70-130 25 <br /> Toluene 30365-03 <0 50 400 400 394 367 ug/L EPA 8260E 12/16/02 984 91 7 708 70-130 25 <br /> Tert-Butanol 30365-03 <5 0 200 200 201 202 ug/L EPA 8260B 12/16/02 100 101 0 744 70-130 25 <br /> Methyl-t-Butyl Ether 30365-03 13 400 400 555 503 ug1L EPA 8260B 12/16/02 106 932 132 70-130 25 <br /> Approved By Joel Kiff <br /> KIFF ANALYTICAL, LLC <br /> ii <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />