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Report Number 34512 <br /> V � <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 9/2/2003 <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 34512-14 <0 0050 00417 00405 00393 00379 mg/Kg EPA 82608 8115103 942 935 0 746 70-130 25 <br /> Toluene 34512-14 <0 0050 00417 00405 00410 00395 mg/Kg EPA 8260B 8115103 98 4 97 5 0 893 70-130 25 <br /> Tert-Butanol 34512-14 25 0208 0202 250 243 mg/Kg EPA 82606 8115103 155 000 200 70-130 25 <br /> Methyl-t-Butyl Ether 34512-14 <0 0050 00417 00405 00367 00359 mgtKg EPA 8260B 8115103 881 888 0 735 70-130 25 <br /> Benzene 34597-01 <0 0050 00401 00401 00362 00365 mg/Kg EPA 8260B 8126103 90 4 912 0 909 70-130 25 <br /> Toluene 34597-01 <0 0050 00401 00401 00339 00346 mg/Kg EPA 8260B 8126103 84 6 86 4 219 70-130 25 <br /> Tert-Butanol 34597-01 <0 0050 0200 0200 0 177 0177 mg/Kg EPA 8260B 8126103 886 885 00734 70-130 25 <br /> Methyl-t-Butyl Ether 34597-01 <0 0050 00401 00401 00348 00339 mg/Kg EPA 82606 8126103 87 0 84 5 2 89 70-130 25 <br /> Benzene 34512-20 <0 50 400 40 0 41 7 39 8 ug/L EPA 8260B 8/17103 104 99 6 468 70-130 25 <br /> Toluene 34512-20 <0 50 400 400 413 402 ug/L EPA 82608 8/17103 103 100 267 70-130 25 <br /> Tert-Butanol 34512-20 130 200 200 335 332 ug/L EPA 82606 8117103 102 100 148 70-130 25 <br /> Methyl-t-Butyl Ether 34512-20 <0 50 400 400 455 439 ug/L EPA 82608 8117/03 114 110 353 70-130 25 <br /> Benzene 34439-05 0 71 40 0 400 414 403 ug/L EPA 82606 8118103 102 990 267 70-130 25 <br /> Toluene 34439-05 <0 50 400 400 421 401 ug/L EPA 8260B 8/18103 105 100 474 70-130 25 <br /> Tert-Butanol 34439-05 <5 0 200 200 205 203 ug/L EPA 8260B 8/18103 102 101 0 946 70-130 25 <br /> Methyl-t-Butyl Ether 34439-05 <0 50 400 400 410 39 7 ug/L EPA 8260B 8/18103 103 99 2 339 70-130 25 <br /> Benzene 34537-01 <0 50 400 400 392 38 5 ug/L EPA 8260B 8/16/03 979 962 173 70-130 25 <br /> Toluene 34537-01 <0 50 400 400 42 7 41 6 ug/L EPA 82606 8116103 107 104 275 70-130 25 <br /> Approved By !J I <br /> KIFF ANALYTICAL, LLC ! <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />