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Report Number 27503 ' <br /> QC Report Matrix Spike/ Matrix Spike Duplicate Date 7/2112002 <br /> Project Name ANAYA <br /> Project Number 3490 <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 /> Benzene 27503-02 <0 50 200 199 21 2 21 8 ug/L EPA 82606 7/19102 106 109 290 70-130 25 <br /> Toluene 27503-02 <0 50 200 199 200 204 ug/L EPA 82606 7119102 100 102 202 70-130 25 <br /> Tert-Butanol 27503-02 <50 100 997 116 110 ug/L EPA 8260B 7/19/02 116 110 5 07 70-130 25 <br /> Methyl-t-Butyl Ether 27503-02 <0 50 200 199 18 0 185 ug/L EPA 8260B 7/19102 901 930 311 70-130 25 <br /> Benzene 27493-06 <0 50 400 400 389 380 ug/L EPA 8260B 7117/02 972 949 242 70-130 25 <br /> Toluene 27493-06 <0 50 400 400 396 387 ug/L EPA 8260B 7117102 989 968 220 70-130 25 <br /> Tert-Butanol 27493-06 <5 0 200 200 185 182 ug/L EPA 82608 7117102 925 91 2 1 51 70-130 25 <br /> Methyl-t-Butyl Ether 27493-06 28 400 400 646 629 ug/L EPA 82606 7117102 90 1 86 0 468 70-130 25 <br /> Approved By Joel Kiff <br /> KIFF ANALYTICAL, LLC <br /> sl <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 �� <br />