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0 0 Report Number 2* <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 4/26/2002 <br /> Project Name 3725 South Tracy <br /> Project Number 020418-DW-2 <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 25997-07 063 394 386 38 8 365 ug/L EPA 8260B 4121102 968 929 415 70-130 25 <br /> Toluene 25997-07 <0 50 394 38 6 394 370 ug/L EPA 82608 4121102 998 958 417 70-130 25 <br /> Tert-Butanol 25997-07 6 5 197 193 211 196 ug/L EPA 8260B 4121102 104 98 0 569 70-130 25 <br /> Methyl-t-Butyl Ether 25997-07 080 39 4 38 6 365 366 ug/L EPA 82608 4121102 904 92 7 244 70-130 25 <br /> Benzene 25987-02 <0 50 400 400 421 414 ug/L EPA 8260B 4120102 105 103 187 70-130 25 <br /> Toluene 25987.02 <0 50 400 400 427 414 ug/L EPA 8260B 4120102 107 103 3 16 70-130 25 <br /> Tert-Butanol 25987-02 <50 200 200 213 213 ug/L EPA 8260B 4120102 106 106 0 174 70-130 25 <br /> Methyl-t-Butyl Ether 25987-02 9 6 400 400 529 539 ug/L EPA 8260E 4120102 108 111 233 70-130 25 <br /> Approved By J ` I Koff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />