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Report Number 31263 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 2110/2003 <br /> Project Name SANCHEZ <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 Recov Recov Diff Limit Limit <br /> Benzene 31263-14 32 400 397 66 7 654 ug/L EPA 82606 217103 864 839 2 95 70-130 25 <br /> Toluene 31263-14 24 400 397 583 572 uglL EPA 82608 217103 867 846 245 70-130 25 <br /> Tert-Butanol 31263-14 <5 0 200 198 189 188 uglL EPA 8260B 217103 944 950 0 586 70-130 25 <br /> Methyl-t-Butyl Ether 31263-14 21 400 397 623 620 uglL EPA 82608 217103 104 104 00635 70-130 25 <br /> Benzene 31277-17 <0 50 400 400 423 401 uglL EPA 82608 215103 106 100 517 70-130 25 <br /> Toluene 31277-17 <0 50 400 400 38 2 361 uglL EPA 8260B 215103 95 4 902 560 70-130 25 <br /> Tert-Butanol 31277-17 <5 0 200 200 212 206 uglL EPA 8260E 215103 106 103 286 70-130 25 <br /> Methyl-t-Butyl Ether 31277-17 <0 50 400 400 41 1 427 ug/L EPA 8260B 215103 103 107 365 70-130 25 <br /> Benzene 31248-01 <0 50 400 400 370 354 uglL EPA 8260B 213103 92 4 885 4 34 70-130 25 <br /> Toluene 31248-01 <0 50 400 400 35 8 35 7 ug[L EPA 62608 213103 89 4 892 0 224 70-130 25 <br /> Tert-Butanol 31248-01 51 200 200 244 276 ug/L EPA 82606 213103 964 112 152 70-130 25 <br /> Methyl-t-Butyl Ether 31248-01 12 400 400 518 51 1 uglL EPA 8260E 213!03 996 980 167 70-130 25 <br /> Benzene 31246-01 <0 50 400 400 39 7 384 ug/L EPA 8260E 214!03 99 2 961 322 70-130 25 <br /> Toluene 31246-01 <0 50 400 400 368 335 uglL EPA 8260B 2!4103 920 838 930 70-130 25 <br /> Tert-Butanol 31246-01 <5 0 200 200 195 185 uglL EPA 8260B 214103 974 923 536 70-130 25 <br /> Methyl-t-Butyl Ether 31246-01 <0 50 400 400 41 5 41 0 uglL EPA 8260B 214103 104 102 126 70-130 25 <br /> Benzene 31357-01 <0 50 400 400 41 7 41 0 uglL EPA 8260B 217103 104 102 172 70-130 25 <br /> Toluene 31357-01 <0 50 40 0 400 382 37 1 uglL EPA 8260B 2!7103 95 6 928 305 70-130 25 <br /> Approved By J el Kiff <br /> KIFF ANALYTICAL, LLC S 1i <br /> 2795 2nd Sl, Suite 300 Davis,CA 95616 530-297-4800 V <br />