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Ms. Mary Ways <br /> November 29, 1993 <br /> Page 2 <br /> These data support the theory. . - ' <br /> j. <br /> Finally, to ensure that our recovery is quantitative, we add.:a.surrogate spike (chlorobenzene) to <br /> every sample. If the surrogate recovery does not'fall within control limits (typically 65%), we <br /> re-extract the sample. .. <br /> I hope that this letter answers your questions. Feel free toiti'.contact me regarding any other issues <br /> that may concern you. <br /> I look forward to meeting you in the future. <br /> Regards <br /> Dr. Blayne Hartman <br />