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Report Number 31350 <br /> QC Report Matnx Spike/Matrix Spike Duplicate Date 2112103 - <br /> Project Name 2575 Country Club Blvd <br /> Project Number 245-0783 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Sp+ked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike DUD Sample Sample Analysis Date Percent Percent Percent Recov Diff <br /> Parameter Sample Value Level revel Value Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Benzene 31398-03 <0 50 400 400 401 386 uglL EPA 8260B 2111103 100 96 6 361 70-130 25 <br /> Toluene 31398-03 <0 50 400 400 354 357 ug/L EPA 8260E 2/11/03 88 4 893 0 984 70-130 25 <br /> Tert-Butanol 31398-03 <50 200 200 196 199 ug1L EPA 82608 2111103 981 994 1 33 70-130 25 <br /> Methyl-t-Butyl Ether 31398-03 <0 50 400 400 41 5 41 2 uglL EPA 82608 2111103 104 103 0 629 70-130 25 <br /> i <br /> Approved By- J I K+it <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />