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Report Number 35996 <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date 12/2/2003 <br /> i <br /> Project Name 2575 Country Club, <br /> Project Number 031126-JB1 <br /> I <br /> Duplicate Spiked <br /> Duplicate Spiked SpikedJl Sample Relatwe <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 it Diff Limit Limit <br /> Tert-Butanol 35987-02 <5 0 200 200 198 209 ug/L EPA 82606 11/30/03 988 104 561 70-130 25 <br /> Methyl-t-Butyl Ether 35987-02 15 400 400 549 561 ug/L EPA 8260B 11/30/03 100 103 285 70-130 25 <br /> Tert-Butanol 35996-03 <5 0 200 200 193 202 ug/L EPA 8260B 11/30/03 966 101 452 70-130 25 <br /> Methyl-t-Butyl Ether 35996-03 <0 50 400 400 385 399 ug/L EPA 8260B 11/30/03 962 998 365 70-130 25 <br /> i <br /> i <br /> i <br /> i <br /> I <br /> J i <br /> KIFF ANALYTICAL, LLC Approved By U <br /> 2795 2nd St„Suite 300 Isis, CA 95616 530-297-4800 <br />