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0 • Report Number- 20 <br /> 4C Report: Matrix Spike/Matrix Spike Duplicate Date 7131101 <br /> Project Name 2575 Country Club Blvd, <br /> Project Number 243.0783-003 <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 /> Spike Recovery Data <br /> Benzene 21392-01 8.0 39 3 391 490 537 ug/L EPA 8260E 7125101 104 117 11 5 70-130 25 <br /> Toluene 21392-01 16 39 3 39.1 56,4 65.1 ug1L EPA 8260E 7125101 102 124 203 70.130 25 <br /> Tert-Butanol 21392-01 64 196 195 262 254 uglL EPA 8260E 7125101 101 974 327 70-130 25 <br /> Methyl-t-Butyl Ether 21392-01 140 39 3 391 201 236 ug/L EPA 82608 7125101 168 260 43 0 70-130 25 <br /> K1FF ANALYTICAL, LLC Approved By JI Kiff <br /> 720 Olive Dnve, Suite D Davis, CA 95616 530-297.4800 <br />