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ENGEO <br /> INCORPORATED <br /> • Types of analysis to be conducted <br /> • Sampler's name <br /> Samples will be identified through the use of a coding system to identify sample locations and <br /> sample replicates. This coding system will provide that samples are uniquely identified, and <br /> provide a tracking procedure to facilitate data validation and retrieval. <br /> It should be noted that only the double volume quality control samples will be labeled with their <br /> QC classification. All other QC samples will only be logged on the Monitoring Well Purge and <br /> Sampling Form, in the field logbook, and on the sampler's copy of the chain-of-custody form, <br /> not on the sample labels or the laboratory's chain-of-custody forms. This will ensure that the <br /> laboratory does not know which of the samples are blanks or duplicates. <br /> The groundwater well samples will be numbered according to the following system: <br /> MW 1-GW-001 <br /> MW1 - Identification of the well. <br /> GW- Identification of the media: groundwater. <br /> 001 Identification of the sample event at the. <br /> Q QA/QC sample (matrix spike/matrix spike duplicate sample only). <br /> Duplicate and field blank samples will be labeled as follows: <br /> MW 10-GW-001 <br /> MWR10- Identification of duplicate or field blank(Ml 0, MW 11, etc.) <br /> GW- Identification of the media: groundwater. <br /> 001 Identification of the sampling event at the well. <br /> Travel blank samples will be assigned by the laboratory and should be logged on the <br /> chain-of-custody form. <br /> 4943.4.640.01 <br /> April 17, 2007 11 <br />