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Sample Preservation and Handling <br /> The following section specifies sample containers, preservation methods. and sample handling <br /> procedures <br /> Sample Containers and Preservation <br /> Sample containers vary with each type of analytical parameter. Container types and materials were <br /> selected to be nonreactive with the particular analytical parameter tested <br /> Sample Handling <br /> Sample containers were labeled immediately prior to sample collection Samples were kept cool <br /> with cold packs until received by the laboratory At the time of sampling, each sample was logged <br /> on an ARCO chain-of-custody record that accompanied the sample to the laboratory <br /> Samples that required overnight storage prior to shipping to the laboratory were kept cool <br /> (40 Celsius) in a refrigerator The refrigerator was kept in a warehouse, which was locked when <br /> not occupied by an EMCON employee A sample/refrigerator log was kept to record the date and <br /> time that samples were placed into and removed from the refrigerator <br /> Samples were transferred from EMCON to an ARCO-approved laboratory by couner or taken <br /> directly to the laboratory by the environmental sampler Sample shipments from EMCON to <br /> laboratories performing the selected analyses routinely occurred within 24 hours of sample <br /> collection <br /> Sample Documentation <br /> The following procedures were used during sampling and analysis to provide chain-of-custody <br /> control during sample handling from collection through storage Sample documentation included <br /> the use of the following <br /> • Water Sample Field Data Sheets to • Chain-of-custody record sheets for <br /> document sampling activities in the field documenting possession and transfer of <br /> • Labels to identify individual samples samples <br /> • Laboratory analysis request sheets for <br /> documenting analyses to be performed <br /> SACW\ADM4$oajXS&APARCo DOC <br />