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� ! i <br /> Report Number 30647 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 116103 <br /> Project Name Beacon <br /> Project Number 3641 Stockton <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 30665-02 <0 50 400 400 400 38 3 ug/L EPA 82606 113103 100 958 4 39 70-130 25 <br /> Toluene 30665-02 <0 50 400 400 337 323 ug/L EPA 82608 113103 843 808 4 21 70-130 25 <br /> Tert-Butanol 30665-02 <5 0 200 200 214 210 ug/L EPA 82606 113103 107 105 1 62 70-130 25 <br /> Methyl-t-Bury!Ether 30665-02 <0 50 400 400 424 398 ug/L EPA 8260B 113103 106 995 623 70-130 25 <br /> Benzene 30648-03 180 400 400 221 221 ug/L EPA 8260B 112103 105 104 0 334 70-130 25 <br /> Toluene 30648-03 38 400 400 720 749 ug/L EPA 82606 112103 ' 83 9 91 0 812 70-130 25 <br /> Tert-Butanol 30648-03 2100 200 200 2340 2260 ug/L EPA 8260B 112103 120 788 41 3 70-130 25 <br /> Methyl-t-Butyl Ether 30648-03 2600 400 400 2550 2650 ug/L EPA 8260B 112103 000 139 200 70-130 25 <br /> Benzene 30647-07 <0 50 400 400 402 401 ug/L EPA 8260E 12/30/02 100 100 0 224 70-130 25 <br /> Toluene 30647-07 <0 50 400 400 396 387 ug/L EPA 82606 12/30/02 989 968 212 70-130 25 <br /> Tert-Butanol 30647-07 <5 0 200 200 198 202 ug/L EPA 82606 12/30/02 990 101 2 09 70-130 25 <br /> Methyl-t-Butyl Ether 30647-07 072 400 400 404 403 ug/L EPA 82606 12/30/02 991 989 0202 70-130 25 <br /> Benzene 30654-12 5 3 400 400 446 433 ug/L EPA 8260B 112103 984 950 3 54 70-130 25 <br /> Toluene 30654-12 16 400 400 55 9 542 ug/L EPA 8260B 112103 100 965 4 14 70-130 25 <br /> Tert-Butanol 30654-12 120 200 200 316 313 uglL EPA 82606 112103 969 952 1 80 70-130 25 <br /> Methyl-t-Butyl Ether 30654-12 140 400 400 185 186 ug/L EPA 8260B 112103 •104 106 215 70-130 25 <br /> V'fa q <br /> Approved By Jbel Kiff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />