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HOUSTON LABORATORY <br /> $880 INTERCHANGE DRIVE <br /> O HOUSTON TEXAS 77054 <br /> ** SPL QUALITY CONTROL REPORT PHONE (713)660-0901 <br /> Matrix Soil Reported on 10/14/99 <br /> Analyzed on 10/14/99 <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 /> I Matrix Spike I Matrix Spike I 1 QC LIMITS <br /> I SPL Sample IMethodlSamplelSpike I I Duplicate I RPD (Advisory) <br /> I I I <br /> I ID Number 1131ank IResultlAdded IResultlRecoverylResultIRecoveryl (4;) 1 RPD I REC <br /> I I1;carb Itcarb Ilscarb Itcarb I t Itcarb I % I I Max I I <br /> 199100109-04BI ND 10 12 10 08 10 21 1112 10 20 1100 1 11 134 156 -131 I <br /> -9910193 <br /> Samples in batch <br /> 9910313-22A <br /> COMMENTS <br /> LCS#94453198-10 <br /> 99100109-04B USED FOR QC PURPOSE ONLY <br />