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Report Number 33426 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 619/2003 <br /> Protect 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 Reiative 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 33428-01 <0 50 400 397 41 6 412 ug/L EPA 82606 614103 104 104 0 313 70-130 25 <br /> Toluene 33428-01 <0 50 400 397 409 408 ug/L EPA 8260B 614103 102 103 0 537 70-130 25 <br /> Tert-Butanol 33428-01 <5 0 200 198 195 195 ug/L EPA 8260B 614103 977 98 2 0 556 70-130 25 <br /> Methyl-t-Butyl Ether 33428-01 <0 50 400 39 7 407 39 8 ug/L EPA 8260B 614103 102 100 1 56 70-130 25 <br /> Benzene 33426-04 56 400 400 109 108 ug1L EPA 82608 613103 132 132 0 341 70-130 25 <br /> Toluene 33426-04 6 0 400 400 48 4 480 ug1L EPA 8260B 613103 106 105 0 947 70-130 25 <br /> Tert-Butanol 33426-04 1800 200 200 2030 1950 ug1L EPA 82608 613103 124 83 5 390 70-130 25 <br /> Methyl4-Butyl Ether33426-04 170 400 400 217 168 ug/L EPA 8260B 613103 107 000 200 70-130 25 <br /> I <br /> Benzene 33435-05 <0 50 400 400 403 405 ug/L EPA 82608 614103 101 101 0 618 70-130 25 <br /> Toluene 33435-05 <0 50 400 400 397 398 ug/L EPA 8260B 614103 993 996 0 276 70-130 25 <br /> Tert-Butanol 33435-05 <5 0 200 200 214 213 ug/L EPA 82608 614103 107 107 0 430 70-130 25 <br /> Methyl-t-Butyl Ether 33435-05 26 40 0 400 434 44 3 ug/L EPA 8260E 614103 102 104 201 70-130 25 <br /> Benzene 33461-03 <0 50 400 400 409 389 ug1L EPA 8260B 614103 102 972 504 70-130 25 <br /> Toluene 33461-03 <0 50 400 400 40 3 37 5 ug/L EPA 8260B 614103 101 937 723 70-130 25 <br /> Tert-Butanol 33461-03 <5 0 200 200 219 213 ug1L EPA 8260B 614103 110 106 3 04 70-130 25 <br /> Methyl-t-Butyl Ether 33461-03 <0 50 400 400 431 402 ug/L EPA 8260E 614103 108 100 687 70-130 25 <br /> Benzene 33426-07 <0 50 400 400 414 417 ug1L EPA 82606 613103 103 104 0 842 70-130 25 <br /> Toluene 33426-07 <0 50 400 400 434 428 ug/L EPA 8260B 613103 108 107 1 37 70-130 25 <br /> I � <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />