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r <br /> Report Number 23652 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 12/10/2001 <br /> Project Name Former Beacon 12419 <br /> Project Number 1419 44 <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 /> Spike Recovery Data <br /> Benzene 23652-01 <0 50 194 191 188 187 ug/L EPA 82608 12141200196 7 981 141 70-130 25 <br /> Toluene 23652-01 <0 50 194 191 19 1 188 ug/L EPA 8260B 12/41200198 0 987 0 661 70-130 25 <br /> Tert-Butanol 23652-01 <5 0 973 954 980 950 ug/L EPA 82608 121412001101 99 6 1 12 70-130 25 <br /> Methyl-t-Butyl Ether 23652-01 <0 50 194 191 201 199 ug/L EPA 8260B 121412001103 104 1 13 70-130 25 <br /> ~� 1 <br /> Approved By J��f KW ANALYTICAL, LLC <br /> � i <br /> 720 Olive Drive, Suite D Davis CA 95616 530-297-4800 U <br />