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Report Number 324 <br /> QC Report . Matrix Spike/Matrix Spike Duplicate Date 5/7103 <br /> Project Name 3725 South Tracy <br /> Project Number 030428-RM-1 <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 32906-03 <0 50 400 400 398 396 ug/L EPA 8260E 4130103 995 991 0 403 70-130 25 <br /> Toluene 32906-03 <0 50 400 400 384 39 5 ug/L EPA 8260B 4130103 959 988 293 70-130 25 <br /> Tert-Butanol 32906-03 <50 200 200 209 211 ug/L EPA 8260B 4130103 104 105 0 890 70-130 25 <br /> Methyl-t-Butyl Ether 32906-03 <0 50 400 400 400 39 6 ug/L EPA 8260B 4130/03 100 991 0 904 70-130 25 <br /> Benzene 32922-01 <0 50 400 400 403 392 ug/L EPA 8260E 511103 101 981 269 70-130 25 <br /> Toluene 32922-01 <0 50 400 400 39 8 391 ug/L EPA 82608 511103 996 978 175 70-130 25 <br /> Tert-Butanol 32922-01 21 200 200 239 236 ug/L EPA 8260B 511103 109 108 1 04 70-130 25 <br /> Methyl-t-Butyl Ether 32922-01 <0 50 400 400 451 446 ug/L EPA 82608 511103 113 111 107 70.130 25 <br /> i <br /> 1 <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />