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Report Number 27576 <br /> 11 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 07/30/2002 <br /> Project Name 2575 Country Club, <br /> Project Number 020718-JK-1 <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 Valued Value Units Method Anal ed Recov Recov II Diff Limit Limit <br /> Benzene 27588-01 <0 50 398 397 372 372 ug/L EPA 8260E 7/23/02 934 937 0 267 70-130 25 <br /> Toluene 27588-01 <0 50 39 8 397 351 352 ug/L EPA 82608 7123102 881 88 7 0 707 70-130 25 <br /> Tert-Butanol 27588-01 <5 0 199 198 162 168 ug/L EPA 8260B 7/23102 814 848 413 70-130 25 <br /> Methyl-t-Butyl Ether 27588-01 071 398 39 7 356 355 ug/L EPA 8260B 7123102 877 878 0134 70-130 25 <br /> i <br /> Benzene 27547-01 <0 50 199 200 21 2 21 1 ug/L EPA 8260B 7123102 107 106 0 823 70-130 25 <br /> Toluene 27547-01 <0 50 199 200 207 204 ug/L EPA 82608 7/23102 104 102 194 70-130 25 <br /> Tert-Butanol 27547-01 <5 0 995 998 992 97 9 ug/L EPA 8260B 7123102 99 7 981 153 70-130 25 <br /> Methyl-t-Butyl Ether 27547-01 <0 50 199 200 198 20 2 ug/L EPA 8260B 7123102 994 101 194 70-130 25 <br /> Benzene 27576-01 <0 50 400 400 39 0 397 ug/L EPA 8260B 7122102 975 992 175 70-130 25 <br /> Toluene 27576-01 <0 50 400 400 406 41 1 ug/L EPA 8260E 7122102 102 103 1 10 70-130 25 <br /> Tert-Butanol 27576-01 400 200 200 607 617 ug/L EPA 8260B 7122102 101 105 463 70-130 25 <br /> Methyl-t-Butyl Ether 27576-01 060 400 400 420 436 ug/L EPA 8260B 7122102 104 108 377 70-130 25 <br /> Approved By J ' I Kiff <br /> KIFF ANA ICAL, LLC <br /> 720 Olive Dnve, Suite D is, CA 95616 530-297.4800 <br /> 1 11 <br />