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1 <br /> Sample Containers and Preservation <br /> Sample containers vary with each type of analytical parameter. Container <br /> types and materials were selected to be nonreactive with the particular <br />' analytical parameter tested. <br /> Sample Handling <br /> Sample containers were labeled immediately following collection. Samples <br /> were kept cool with cold packs until received by the laboratory. Cold packs <br /> were replaced each day to maintain refrigeration. At the time of sampling, <br /> each sample was logged on a Sampling and Analysis Chain-of-Custody <br /> Record (see Figure A-4) that accompanied the sample to the laboratory. <br />' Samples were transferred from the site to Sequoia Analytical Laboratory, <br /> a Mobil-approved, state-certified laboratory. Sample shipment from EMCON <br /> Associates to laboratories performing the selected analyses routinely <br /> occurred within 24 hours of sample receipt. The laboratory manager <br /> checked the holding times for requested analyses so that they were not <br />' exceeded. <br /> Sample Documentation <br /> The following procedures were used during sampling and analysis to <br /> provide chairs-of-custody control during sample handling from collection <br /> through storage. Sample documentation included the use of the following: <br /> • field logbook to document sampling activities in the field <br />' C labels to identify individual samples <br /> • chain-of-custody record sheets for documenting possession <br />' and transfer of samples <br /> • laboratory analysis request sheets for documenting <br />' analyses to be performed <br /> Field Logbook <br /> tIn the field, the sampler recorded the following information on the Water <br /> Sample Field Data Sheet (see Figure A-2) for each sample collected: <br /> O project number <br /> G client's name <br /> V location <br /> pjO\Of901of90002O.3az A - 4 Rev. 0 January 27, 1993 <br />