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t <br /> Report Number 20326 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 6/7/2001 <br /> Project Name 2494 Fremont Street, <br /> Project Number 090514-J2 <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 /> Spike Recovery Data <br /> Benzene 20336-02 <0 50 24 3 245 22 7 22 7 ug/L EPA 82608 51201200193 5 925 1 14 70-130 25 <br /> Toluene 20336-02 <0 50 243 245 220 22 3 ug/L EPA 82608 5120/200190 4 91 0 0 662 70-130 25 <br /> Tert-Butanol 20336-02 <5 0 24 3 245 230 287 ug/L EPA 8260E 51201200194 5 117 21 4 70-130 25 <br /> Methyl-t-Butyl Ether 20336-02 1 7 24 3 245 238 247 ug/L EPA 8260E 51201200190 9 93 7 306 70-130 25 <br /> ti <br /> Approved By J�jl Kiff t <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-2974800 <br />