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Report Number : 40778 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 11/512004 <br /> Project Name : Granite Const. - French <br /> Project Number : 2088 . 09 <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 /> TPH as Diesel Blank <50 1000 1000 945 904 ug/L M EPA 8015 11 /2/04 94.5 90.4 4.40 70-130 25 <br /> TPH as Diesel Blank <50 1000 1000 954 1050 ug/L M EPA 8015 11 /5/04 95.4 105 9.30 70-130 25 <br /> Benzene 40793-14 <0.50 40.0 40.0 38.4 37. 1 ug/L EPA 8260B 11 /2/04 96.0 92.7 3.52 70-130 25 <br /> Toluene 40793-14 2.6 40.0 40.0 40.6 39.6 ug/L EPA 8260B 11 /2/04 95.0 92.5 2.67 70-130 25 <br /> Tert-Butanol 40793-14 290 200 200 470 490 ug/L EPA 82608 11 /2/04 91A 101 10.4 70-130 25 <br /> Methyl-t-Butyl Ether40793-14 1600 40.0 40.0 1620 1570 ug/L EPA 82608 1112/04 0.00 0.00 0.00 70-130 25 <br /> Approved By: Jo ff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />