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HOUSTON LABORATORY <br /> *+ 8880 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> PHONE(713)6MO901 <br /> ** SPL QUALITY CONTROL REPORT ** <br /> Matrix Soil Reported on 10/21/99 <br /> Analyzed on 10/21/99 <br /> Analyst TW <br /> This sample was randomly selected for use in the SPL quality control <br /> program Samples chosen are fortified with a known concentration <br /> in duplicate The results are as follows : <br /> Total Organic Carbon in Soil as % Carbon <br /> Walkley-Black <br /> SPL Sample Blank LCS Measured % QC Limits <br /> ID Number Value Concentration Concentration Recovery Recovery <br /> %carbon %carbon °carbon <br /> LCS ND 1 00 1 05 105 80 - 120 <br /> -9910284 N <br /> ples in batch <br /> 9910418-13A <br /> COMMENTS <br /> i <br /> LCS#94453198-10 <br />