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• � . Report Number 31587 I QC Report Matrix Spike/Matrix Spike Duplicate Date 2/25/2003 Project Name Former Beacon 12419 Project Number 1419 46 Duplicate Spiked Duplicate Spiked Spiked Sample Relative Spike Spiked Spiked Sample Sample Relative Percent Percent Spiked Sample Spike Dup Sample Sample Analysis Date Percent Percent Percent Recov Diff Parameter Sample Value Level Level Value Value Units Method Analyzed Recov Recov Diff Limit Limit Benzene 31624-04 <0 50 399 400 406 400 ug/L EPA 8260B 2122103,:102 100 1 86 70-130 25 Toluene 31624-04 <0 50 399 400 407 400 ug/L EPA 8260B 2122103 102 100 1 78 70-130 25 Tert-Butanol 31624-04 17 200 200 212 210 ug/L EPA 82606 2122103 97 6 963 1 38 70-130 25 Methyl-t-Butyl Ether 31624-04 <0 50 399 400 34 7 355 ug/L EPA 62606 2122103 870 886 191 70-130 25 Benzene 31587-01 <0 50 400 400 395 389 ug/L EPA 8260B 2120103 988 972 168 70-130 25 Toluene 31587-01 <0 50 400 400 434 422 ug/L EPA 8260B 2120103 109 106 278 70-130 25 Tert-Butanol 31587-01 <5 0 200 200 213 216 ug/L EPA 8260B 2120103 106 108 148 70-130 25 Methyl-t-Butyl Ether 31587-01 <0 50 400 400 374 365 ug/L EPA 8260B 2120103 936 914 241 70-130 25 Benzene 31614-05 <0 50 400 400 37 9 374 ug/L EPA 8260B 212W3 94 7 935 1 33 70-130 25 Toluene 3161405 <0 50 400 400 37 7 38 3 ug/L EPA 8260B 2121103 94 4 958 1 52 70-130 25 Tert-Butanol 31614-05 <5 0 200 200 192 190 ug/L EPA 82606 2121103 95 8 951 0 760 70-130 25 Methyl-t-Butyl Ether 31614-05 20 400 400 51 1 51 0 ug/L EPA 82606 2121103 778 777 00965 70-130 25 Benzene 31613-01 083 400 400 399 395 ug/L EPA 8260B 2121103 97 6 967 0 875 70-130 25 Toluene 31613-01 13 400 400 408 404 ug/L EPA 82606 2121103 987 97 9 0 839 70-130 25 Tert-Butanol 31613-01 <5 0 200 200 208 203 ug/L EPA 8260B 2121103 104 101 262 70-130 25 Methyl-t-Butyl Ether 31613-01 7 9 400 400 464 461 ug/L EPA 8260B 2121103 961 954 0 757 70-130 25 1 Approved By Jbel Kiff KIFF ANALYTICAL, LLC ` p 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 v