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Report Number 41480 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 12/20/2004 <br /> Project Name HAWORTH <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 /> TPH as Diesel Blank <50 1000 1000 1090 1080 ug/L M EPA 8015 12/16/04 109 108 0 874 70-130 25 <br /> 1,1-Dichloroethane 41498-02 <0 50 400 400 366 358 ug/L EPA 8260B 12/17104 91 6 894 239 70-130 25 <br /> Benzene 41498-02 <0 50 400 400 392 385 ug/L EPA 8260B 12/17104 981 962 1 97 70-130 25 <br /> 1,2-Dichloroethane 41498-02 <0 50 400 400 41 7 412 ug/L EPA 82608 12/17/04 104 103 123 70-130 25 <br /> Toluene 41498-02 <0 50 400 400 41 3 406 ug1L EPA 82608 12/17/04 103 101 1 68 70-130 25 <br /> Chlorobenzene 41498-02 <0 50 400 400 405 393 ug/L EPA 8260B 12/17104 101 983 300 70-130 25 <br /> Tert-Butanof 41498-02 <5 0 200 200 206 202 ug/L EPA 8260E 12/17/04 103 101 164 70-130 25 <br /> Methyl-t-Butyl Ether41498-02 1 8 400 400 368 367 ug/L EPA 82608 12/17104 874 872 0 306 70-130 25 <br /> — �'4 <br /> Approved By Joe Iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />