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Report Number 21554 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 911912001 <br /> Project Name 2575 Country Club, <br /> Project Number 010727-J1 <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 Analysts Date Percent Percent Percent Recov Diff <br /> Parameter Sample Value Level Level Value�J Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Spike Recovery Data <br /> Benzene 21554-19 <0 50 194 198 206 209 ug/L EPA 82608 8/4/2001 106 106 0 495 70-130 25 <br /> Toluene 21554-19 <0 50 194 198 21 0 215 ug/L EPA 8260E 8/4/2001 108 109 0 484 70-130 25 <br /> Tert-Butanol 21554-19 <5 0 971 98 9 106 104 ug/L EPA 8260E 8/4/2001 109 106 3 01 70-130 25 <br /> Methyl-t-Butyl Ether 21554-19 <0 50 19 4 198 206 235 ug/L EPA 8260B 8/4/2001 106 119 114 70-130 25 <br /> I <br /> 1 <br /> !�iFF ANAL CAL, LLC Approved By J I Kiff <br /> 720 Olive Drive, Suite D is, CA 95616 530-297-4800 • <br /> if <br />