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I i <br /> Report Number 24371 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 1/28/2002 <br /> Protect Name 420 W. Keft>tleman Lane, <br /> Protect Number 020115-JB1 <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 /> Benzene 24346-01 <0 50 193 186 205 198 ug/L EPA 82608 1/2012002106 106 0 259 70-130 25 <br /> Toluene 24346-01 <0 50 193 186 200 191 ug/L EPA 82608 112012002103 102 0 948 70-130 25 <br /> Tert-Butanol 24346-01 <5 0 967 932 876 81 8 ug/L EPA 8260B 11201200290 6 878 316 70-130 25 <br /> Methyl-t-Butyl Ether 24346-01 <0 50 193 186 187 18 0 ug/L EPA 8260B 11201200296 6 967 0 129 70-130 25 <br /> Benzene 24404-08 <0 50 400 400 405 39 4 ug/L EPA 8260B 111912002101 984 2 90 70-130 25 <br /> Toluene 24404-08 <0 50 400 400 406 396 ug/L EPA 82608 111912002102 98 9 264 70-130 25 <br /> Tert-Butanol 24404-08 <50 200 200 190 189 ug/L EPA 82608 1/191200294 9 946 0 359 70-130 25 <br /> Meth l-t-Bu I Ether 24404-08 <0 50 40 0 40 0 42 3 42 3 u 9 IL EPA 8260B 111912002106 106 00709 70-130 25 <br /> Y tY <br /> KIFF AN <br /> Approved By J ` i Kiff <br /> 720 Olive Drive, Suite ICAL, LLC vis, CA 95616 530-297-4800 <br />