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Report Number 35062 <br /> QC Report Matrix Spike! Matrix Spike Duplicate Date 9/29/2003 <br /> I <br /> Project Name 7-Eleven Store #14117 <br /> Project Number 77EL 14117.03 <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 34973-09 <0 50 400 400 36 7 354 uglL EPA 8260B 9123103 918 88 4 3 69 70-130 25 <br /> Toluene 34973-09 <0 50 400 400 362 353 ug/L EPA 8260B 9123103 90 6 882 260 70-130 25 <br /> Tert-Butanol 34973-09 <5 0 200 200 191 191 uglL EPA 82608 9123103 954 954 000 70-130 25 <br /> Methyl-t-Butyl Ether 34973-09 065 400 400 396 38 8 ug/L. EPA 8260B 9123103 973 954 197 70-130 25 <br /> Benzene 35153-04 <0 50 400 400 41 7 41 7 uglL EPA 8260B 9129103 104 104 0 144 70-130 25 <br /> Toluene 35153-04 <0 50 400 400 422 41 7 uglL EPA 8260B 9129103 105 104 1 02 70-130 25 <br /> Tert-Butanol 35153-04 <5 0 200 200 206 204 ug1L EPA 82606 9129103 103 102 0 982 70-130 25 <br /> Methyl-t-Butyl Ether 35153-04 <0 50 400 400 41 7 406 ug/L EPA 82608 9129103 104 102 265 70-130 25 <br /> Benzene 35144-02 4 1 400 400 434 41 6 uglL EPA 82606 9126103 98 3 938 468 70-130 25 <br /> Toluene 35144-02 <0 50 400 400 440 427 uglL EPA 8260B 9126103 110 107 295 70-130 25 <br /> Tert-Butanol 35144-02 <5 0 200 200 207 207 ug1L EPA 82606 9126103 104 103 0 222 70-130 25 <br /> Methyl-t-Butyl Ether 35144-02 82 400 400 120 119 ug1L EPA 82606 9126103 94 2 91 3 310 70-130 25 <br /> Benzene 35144-05 <0 50 400 400 41 5 39 3 uglL EPA 8260B 9126103 104 98 3 539 70-130 25 <br /> Toluene 35144-05 <0 50 400 400 370 378 uglL EPA 8260B 9126103 924 94 6 238 70-130 25 <br /> Tert-Butanol 35144-05 <5 0 200 200 212 211 uglL EPA 8260E 9126103 106 105 0 525 70-130 25 <br /> Methyl-t-Butyl Ether 35144-05 <0 50 400 400 41 3 42 9 uglL EPA 82606 9126103 103 107 3 82 70-130 25 <br /> Benzene 35028-02 7 2 400 400 480 473 uglL EPA 82606 9123103 102 100 168 70-130 25 <br /> Toluene 35028-02 <0 50 400 400 41 2 404 ug/L EPA 8260B 9123103 103 101 2 08 70-130 25 <br /> 1,,kk, <br /> Approved By 1J I � <br /> KIFF ANALYTICAL, LLC j <br /> 2795 2nd St, Suite 300 Davis, CA 96616 530-297-4800 �, <br />