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Report Numbor 24669 , <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 2120102 <br /> Project Name Robles <br /> Project Number 3490 <br /> Duplicate Spired <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 Doff <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Benzene 24702-01 4 8 40 1 39 8 44 8 421 ug/L EPA 8260B 2112102 99 8 935 651 70-1'10 25 <br /> Toluene 24702-01 066 40 1 398 403 366 uglL EPA 8260B 2112102 99 0 903 915 70-130 25 <br /> Tert-Butanol 24702-01 21a0 200 1% 4 P) 442 ug/L EPA 82608 2/12102 111 955 1,111 70 110 25 <br /> Methyl-t-Butyl Ether 24702 01 150 40 1 39 8 180 182 ug/L EPA 8260B 2112102 668 73 7 9 87 70-130 25 <br /> _ GI <br /> Approved By JIw I Kiff �f <br /> Kl�f ANALYTICAL LLC <br /> 120 Olive Drive; Smte D Davis CA 95616 530-297-4800 �` <br />