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Report Number 27981 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 8120/2002 <br /> Project Name SANCHEZ <br /> Project Number <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 27979-02 <0 50 39 9 39 9 39 9 406 ug/L EPA 8260B 8115102 100 102 183 70-130 25 <br /> Toluene 27979-02 <0 50 399 399 398 406 ug/L EPA 8260B 8115102 998 102 201 70-130 25 <br /> Tert-Butanol 27979-02 <5 0 200 200 232 205 ug/L EPA 8260B 8115102 116 103 122 70-130 25 <br /> Methyl-t-Butyl Ether 27979-02 2 3 399 39 9 429 407 ug/L EPA 8260B 8115102 102 960 5 57 70-130 25 <br /> Benzene 27981-02 <0 50 400 400 413 408 ug/L EPA 8260B 8113102 103 102 1 32 70-130 25 <br /> Toluene 27981-02 <0 50 400 400 416 412 ug/L EPA 8260B 8113102 104 103 0 942 70-130 25 <br /> Tert-Butanol 27981-02 <50 200 200 200 202 ug/L EPA 8260E 8/13102 100 101 0 705 70-130 25 <br /> Methyl-t-Butyl Ether 27981-02 61 400 400 450 451 ug/L EPA 8260B 8113/02 97 4 97 6 0 154 70-130 25 <br /> i <br /> ~ 1 <br /> KIFF ANALYTICAL, LLC Approved By J I Kiff <br /> 720 Olive Drive,Suite D Davis,CA 96616 530-2974800 <br />