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Report Number 29606 <br /> 11 <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date 11/18/2002 <br /> Project Name • 2575 Country Club Blvd> <br /> Project Number 244-0783 <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 Sam le Value Level Level Value Value Units Method Analyzed Recov Recov Diff Limit Lima <br /> Benzene 29676-04 <0 50 400 400 42 1' 42 2 ug1L EPA 8260B 11/10/02 105 105 0190 70-130 25 <br /> Toluene 29676-04 <0 50 40.0 40,0 405 408 ug1L EPA 82608 11/10/02 101 102 0 811 70-130 25 <br /> Tert-Butanol 29676-04 <5 0 200 200 201 215 ug/L EPA 8260B 11/10/02 100 107 682 70-130 25 <br /> Methyl-t-Butyl Ether 29676-04 <0 50 40.0 40.0 39.6 396 ug/L. EPA 8260B 11/10/02 99.0 99 0 0101 70-130 25 <br /> I <br /> Benzene 29606-04 <0 50 400 400 416 422 ug/L. EPA 8260B 1118102 104 106 1 53 70-130 25 <br /> Toluene 29606-04 <0 50 400 400 4191 428 ug/L. EPA 8260B 1118102 105 107 213 70-130 25 <br /> Tert-Butanol 29606-04 1800 200 200 1100 1020 ug/L. EPA 82608 1118102 000 000 000 70-130 25 <br /> Methyl-t Butyl Ether 29606-04 <0 50 400 400 45.7 47.0 ug/L. EPA 8260B 1118102 114 117 285 70-130 25 <br /> i <br /> Approved By .I f Kiff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 306vis, CA 95616 530-297-4800 <br /> 1� <br />