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Report Number 31207 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 2/6103 <br /> Project Name Singh Tracy <br /> Project Number 3254 <br /> Siked <br /> Duplicate Spiked Spiked to Sample Relative <br /> Spike Spiked 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 Level Value Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Benzene 31200-02 <0 50 400 400 41 9 41 5 ug/L EPA 82608 1131103 105 104 1 05 70-130 25 <br /> Toluene 31200-02 <0 50 400 400 38 7 381 ug/L EPA 8260B 1131103 96 7 953 143 70-130 25 <br /> Tert-Butanol 31200-02 12000 200 200 12100 12100 ug/L EPA 8260E 1131103 000 000 000 70-130 25 <br /> Methyl-t-Butyl Ether 31200-02 063 400 400 39 3 387 ug/L EPA 82608 1131103 966 951 1 56 70-130 25 <br /> Benzene 31216-05 11 400 400 484 464 ug/L EPA 82608 212103 935 885 549 70-130 25 <br /> Toluene 31216-05 <0 50 400 400 373 36 4 ug/L EPA 8260B 2!2103 933 91 1 244 70-130 25 <br /> Tert-Butanol 31216-05 13 200 200 204 204 ug/L EPA 8260B 2!2103 954 955 00524 70-130 25 <br /> Methyl-t-Butyl Ether 31216-05 160 40 0 400 198 196 ug/L EPA 82608 2!2103 105 98 7 642 70-130 25 <br /> Approved By J I Koff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />