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Report Number 27965 <br /> QC Report . Matnx Spike/Matrix Spike Duplicate Date 8120102 <br /> Project Name 2494 Fremont Street, <br /> Project Number 020808.CB1 <br /> Duplicate Spiked Spiked to 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 J Level Value Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Benzene 27984-02 <0 50 400 400 423 41 7 ug/L EPA 8260B 8113102 106 104 143 70-130 25 <br /> Toluene 27984-02 <0 50 400 400 400 39 2 ug/L EPA 82603 8113102 100 980 194 70-130 25 <br /> Tert-Butanol 27984-02 12000 200 200 13500 13000 ug/L EPA 8260B 8113102 510 292 54 3 70-130 25 <br /> Methyl-t-Butyl Ether 27984-02 320 400 400 348 347 ug/L EPA 8260B 8/13102 615 591 402 70-130 25 <br /> I <br /> Approved By J I Kiff <br /> KIFF ANA ICAL, LLC <br /> • 720 Olive Drive. Suite D is, CA 95616 530-297-4800 <br />