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0 <br /> 0 <br /> 0Re orNumber 25772 <br /> p <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date 4/412002 <br /> Project Name Chevron 9-57751307 W <br /> Project Number 77CH.43452.00.0550 <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 25772-02 <0 50 400 400 438 438 ug/L EPA 8260B 413102 109 110 0 160 70-130 25 <br /> Toluene 25772-02 <0 50 400 400 456 446 ug/L EPA 8260B 413102 114 112 228 70-130 25 <br /> Tert-Butanol 25772-02 <5 0 200 200 211 207 ug/L EPA 82606 413102 106 103 207 70-130 25 <br /> Methyl-t Butyl Ether 25772-02 <0 50 400 40 0 41 5 437 ug/L EPA 8260B 413102 104 109 500 70-130 25 <br /> Benzene 25758-01 <0 50 400 400 429 424 ug/L EPA 82606 414102 107 106 1 15 70-130 25 <br /> Toluene 25758-01 <0 50 400 400 444 450 ug/L EPA 82606 414102 111 112 1 25 70-130 25 <br /> Tert-Butanol 25758-01 <5 0 200 200 203 208 ug/L EPA 8260B 414102 102 104 242 70-130 25 <br /> Methyl-t-Butyl Ether 25758-01 <0 50 400 400 407 380 ug/L EPA 8260B 414102 102 95 0 6 91 70-130 25 <br /> I <br /> R <br /> t <br /> S <br /> Approved By J I Ki f <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Dnve, Suite D Davis, CA 95616 530-297-4800 <br />