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Report Number 12143 <br /> QC Report Method Spikes/Method Spike Duplicates Date 08/27/98 <br /> i <br /> Project Name Three B's Truck Plaza <br /> Project Number 98-0821-016 <br /> i <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 /> Soil Spike Recovery Data <br /> 1,1-Dichloroethene Blank <0 0050 00500 00500 00399 00390 mg/Kg EPA 8260E 08/26/98 799 781 225 70-130 25 <br /> Benzene Blank <0 0050 00500 00500 00478 00481 mg/Kg EPA 8260B 08126198 956 962 0 563 70-130 25 <br /> Trichloroethene Blank <0 0050 00500 00500 00490 00484 mg/Kg EPA 8260B 08/26/98 98 0 96 7 131 70-130 25 <br /> Toluene Blank <0 0050 00500 00500 00486 00489 mg/Kg EPA 82608 08/26/98 973 977 0 451 70-130 25 <br /> Chlorobenzene Blank <0 0050 00500 00500 00476 00483 mg/Kg EPA 8260B 08/26/98 951 966 161 70-130 25 <br /> Approved By Jo I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />