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Report Number 26674 <br /> QC Report Matnx Spike/Matrix Spike Duplicate Date 6/10/2002 <br /> Project Name 620 W. Charter Way, <br /> Project Number 020531-CBI <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 <br /> Spiked <br /> Value Level Level Value Value Units Method Analyzed Recov Recov?' Diff Limit Limit <br /> Benzene 26672-04 16 36 9 370 362 372 ug/L EPA 82608 618102 936 963 285 70-130 25 <br /> Toluene 26672-04 <0 50 369 370 360 371 ug/L EPA 8260B 618102 974 100 2 93 70-130 25 <br /> Tert-Butanol 26672-04 34 184 185 205 224 ug/L EPA 8260E 618102 928 103 108 70-130 25 <br /> Methyl-t-Butyl Ether 26672-04 150 369 370 180 181 ug/L EPA 82608 618102 829 84 7 209 70-130 25 <br /> Benzene 26756-03 <0 50 400 400 412 401 ug/L EPA 82608 618102 103 100 263 70-130 25 <br /> Toluene 26756-03 <0 50 400 400 388 378 ug/L EPA 8260B 618102 970 94 5 253 70-130 25 <br /> Tert-Butanol 26756-03 <5 0 200 200 193 208 ug/L EPA 8260B 618/02 966 104 738 70-130 25 <br /> Methyl-t-Butyl Ether 26756-03 36 400 400 785 775 ug/L EPA 8260E 6/8102 106 103 244 70-130 25 <br /> Benzene 26674-01 <0 50 400 400 419 404 uglL EPA 82608 6/6/02 105 101 347 70-130 25 <br /> Toluene 26674-01 <0 50 400 400 392 376 ug/L EPA 8260B 616102 981 941 411 70-130 25 <br /> Tert-Butanol 26674-01 <5 0 200 200 197 192 ug/L EPA 82608 616/02 987 962 257 70-130 25 <br /> Methyl-t-Butyl Ether 26674-01 <0 50 400 400 425 421 ug/L EPA 8260B 616/02 106 105 0 851 70-130 25 <br /> i <br /> a <br /> CAL, LLC <br /> KIFF ANApproved By J " 1 Koff <br /> A / <br /> 720 Olive Drive, Suite Aim, CA 95616 530-297-4800 • <br />