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CASE NARRATIVE <br /> This Case Narrative applies to the analysis of TPH-IR - EPA Method <br /> ' 418 . 1 for CHEMWEST Ticket Number 9805 . <br /> All of the samples associated with this ticket were extracted and <br /> ' analyzed within hold times. The method blank met acceptance <br /> criteria. <br /> The Method Blank Spike and Method Blank Spike Duplicate met <br /> acceptance criteria for recoveries and relative percent <br /> differences. <br /> ' Due to the high concentration of the original sample, the Matrix <br /> Spike and Matrix Spike Duplicate exceeded acceptance criteria for <br /> percent recoveries but met acceptance criteria for RPD. <br /> r <br /> F. Thomas Kwoka Date <br /> ' Chem Lab Manager <br /> 1 <br /> COMPUCHEM MSTERN DNISION <br />