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�1 <br /> 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 <br /> were 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 <br /> logged 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 /> (4°Celsius) in a refrigerator The refrigerator was kept in a warehouse, which was locked when <br /> not occupied by an IT employee A sample/refrigerator log was kept to record the date and time <br /> that samples were placed into and removed from the refrigerator <br /> Samples were transferred from IT to an ARCO-approved laboratory by couner or taken directly <br /> to the laboratory by the environmental sampler Sample shipments from IT to laboratories <br /> performing the selected analyses routinely occurred within 24 hours of sample 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 document • Chain-of-custody record sheets for <br /> 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 /> Field Logbook <br /> In the field, the sampler recorded the following information on the water sample field data sheet <br /> (see Figure A-2) for each sample collected <br /> CP\N 1CaraPk\DataNOMR1ARCO\lstg00127 30QI00 DOC-97ft 2 <br /> TT Corporation <br /> A-4 0425/00 <br />