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SAMPLE PRESERVATION <br /> AND HANDLING <br /> Samples are preserved for analysis by following specific preservation and handling procedures <br /> vvhich vary depending on the container type. <br /> Sample Containers and Preservation <br /> Sample containers vary with each type of analytical parameter. Container types and materials are <br /> selected to be nonreactive with the particular analytical parameter tested. Specific preservation <br /> requirements are required for different container types (Table A-1). <br /> Sample Handling <br /> Sample containers are labeled immediately following collection. Samples are kept cool with cold <br /> packs until received by the laboratory. Cold packs are replaced each day to maintain refrigeration. <br /> At the time of sampling, each sample is logged on a sampling and analysis chain-of-custody record <br /> (see Figure A-3)that accompanies the sample to the laboratory. <br /> The sampling team transfers the samples from the site to the CAS laboratory. Within 24 hours <br /> after samples are received, samples are routinely shipped from EMCON to CAS. The CAS <br /> laboratory manager checks the holding times for requested analyses so that they are not exceeded. <br /> SAMPLE DOCUMENTATION <br /> Sample documentation is used to provide chain-of-custody control during sample handling from <br /> collection through storage and includes the use of the following: <br /> • Field logbook to document sampling activities in the field <br /> • Labels identifying individual samples <br /> • Chain-of-custody record sheets for documenting possession and transfer of samples <br /> • Laboratory analysis request sheets for documenting analyses to be performed <br /> f <br /> NWiscellaneous\Groundwater Info-All Sites\SAP Appendixkdoc <br /> A-5 <br />