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Report Number A <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 4/17/2002 <br /> Project Name 1071 North Main St,, <br /> Project Number 020411-JB1 <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 25901-01 <0 50 400 400 438 436 ug/L EPA 8260B 4113102 110 109 0 618 70-130 25 <br /> Toluene 25901-01 <0 50 400 400 449 444 ug/L EPA 82608 4113102 112 111 123 70-130 25 <br /> Tert-Butanol 25901-01 <5 0 200 200 207 215 ug/L EPA 82608 4113102 104 108 380 70-130 25 <br /> Methyl-t-Butyl Ether 25901-01 <0 50 400 400 45 6 461 ug/L EPA 82608 4113102 114 115 1 16 70-130 25 <br /> I <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />