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t <br /> . Report Number 004 <br /> 4C Report: Matrix Spike/Matrix Spike Duplicate Date 10/8/2001 <br /> Project Name 2575 Country Club Blvd, <br /> Project Number 243-0783-003 <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 Sam le Value Level Level Value Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Spike Recovery Data <br /> Benzene 22477-01 <0.50 187 192 184 19 2 ug/L EPA 8260B 10121200198 4 100 1 69 70-130 25 <br /> Toluene 22477-01 <0 50 18,7 192 188 196 ug/L EPA 82608 101212001100 102 155 70-130 25 <br /> Tert-Butanol 22477-01 <5 0 93.4 96.2 892 93 5 ug/L EPA 82608 10121200195,6 973 177 70-130 25 <br /> Methyl-t Butyl Ether 22477-01 <0,50 187 19 2 17,5 18,3 ug/L EPA 8260B 10121200193 6 954 190 70-130 25 <br /> A 1 <br /> KIFF ANALYTICAL, LLC Approved By; J I Kiff <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />