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i <br /> Report Number 36467 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 12!3012003 <br /> Project Name 7-Eleven Store #19976 <br /> Project Number 77EL.19976.03 <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 36468-01 <0 50 388 38 6 38 9 379 ug/L EPA 8260B 12/28/03 100 98 2 206 70-130 25 <br /> Toluene 36468-01 <0 50 388 38 6 38 0 38 0 ug/L EPA 8260B 12/28/03 98 0 98 6 0 585 70-130 25 <br /> Tert-Butanol 36468-01 <5 0 194 193 191 186 ug/L EPA 8260B 12/28/03 985 96 2 236 70-130 25 <br /> Methyl-t-Butyl Ether 36468-01 <0 50 38 8 386 356 351 ug/L EPA 82608 12/28/03 918 910 0 985 70-130 25 <br /> Benzene 36467-10 <0 50 400 400 395 396 ug/L EPA 8260B 12/30/03 988 990 0 227 70-130 25 <br /> Toluene 36467-10 <0 50 400 400 42 0 41 8 ug/L EPA 8260B 12/30/03 105 105 0 382 70-130 25 <br /> Tert-Butanol 36467-10 <5 0 200 200 206 203 ug/L EPA 8260B 12/30/03 103 102 1 19 70-130 25 <br /> Methyl-t-Butyl Ether 36467-10 18 400 400 412 424 ug/L EPA 8260B 12/30/03 98 5 102 305 70-130 25 <br /> Benzene 36494-02 <0 50 400 400 398 382 ug/L EPA 8260B 12/30/03 995 956 3 97 70-130 25 <br /> Toluene 36494-02 <0 50 400 400 422 408 ug/L EPA 8260B 12/30/03 106 102 354 70-130 25 <br /> Tert-Butanol 36494-02 <5 0 200 200 202 203 ug/L EPA 8260B 12/30/03 101 101 0 573 70-130 25 <br /> Methyl-t-Butyl Ether36494-02 <0 50 400 400 402 386 ug/L EPA 8260B 12/30/03 100 964 4 06 70-130 25 <br /> Benzene 36469-02 <0 50 400 400 413 405 ug/L EPA 8260B 12/30/03 103 101 193 70-130 25 <br /> Toluene 36469-02 <0 50 400 400 41 8 408 ug/L EPA 82606 12/30/03 104 102 230 70-130 25 <br /> Tert-Butanol 36469-02 <5 0 200 200 209 204 ug/L EPA 8260B 12/30/03 104 102 2 21 70-130 25 <br /> Methyl-t-Butyl Ether 36469-02 <0 50 400 400 388 390 ug/L EPA 8260B 12/30/03 970 975 0 566 70-130 25 <br /> Benzene 36471-05 <0 50 400 400 44 8 445 ug/L EPA 8260B 12/30/03 112 111 0 627 70-130 25 <br /> Toluene 36471-05 <0 50 400 400 431 426 ug/L EPA 8260B 12/30/03 108 106 107 70-130 25 <br /> f I <br /> KIFF ANALYTICAL, LLC Approved By J I <br /> i2795 2nd St, Suite 300 leis, CA 95616 530-297-4800 <br />