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Eli <br /> Section No. 9.0 <br /> Revision No. 6 <br /> Date 6/1/88 <br /> Page 20 <br /> 4. Analysis of Split Samples <br /> Depending upon the work plan for a particular project, split <br /> samples will be submitted to the laboratory by field personnel. <br /> A split sample is one which has been portioned into two or more <br /> containers from a single sample container. Portioning assumes <br /> ff adequate mixing to assure the "split samples" are, for all <br /> practical purposes, identical. The split may be submitted <br /> blind, that is, the split portion is given a different ID than <br /> the original sample and goes through the same analytical <br /> z scheme. There are also times when the split is sent to another <br /> >` laboratory as a performance check. <br /> j" 5. Measurement of Method Detection Limits <br /> Periodically, Canonie reevaluates its method detection limits <br /> (MDL) and reporting limits (RL) for each matrix type and for <br /> each method. <br /> To determine the MDL, the methods prescribed by the EPA are <br /> employed. The MOL is defined as the minimum concentration of a <br /> substance that can be identified, measured, and reported with <br /> 99 percent confidence. For the appropriate procedure see <br /> Appendix A which follows this text. <br />