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Ci <br />0 <br />Lysimeter Sampling <br />If Lysimeter sampling and analysis are required, a vacuum will be applied to the lysimeters only if <br />an electrical conductivity monitor indicates that the soil -moisture content and soil suction are <br />adequate for attempting to collect a sample. Vacuum and pressure will be alternately applied to the <br />lysimeters over a 72 -hour period to achieve the sample volumes required for analysis. If sufficient <br />sample volume is not obtained within 72 hours, the Lysimeter will be recorded as dry for the <br />monitoring period and suction will be reapplied during the next monitoring event. <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 will <br />be selected to be nonreactive with the particular analytical parameter tested. Specific sample <br />volume, container types, and preservation requirements are presented in Table A-1. <br />Sample containers will be labeled immediately following collection. Samples will be kept cool with <br />cold packs until received by the laboratory. Cold packs will be replaced each day to maintain <br />refrigeration. At the time of sampling, each sample will be logged on a sampling and analysis <br />chain -of -custody record (see Figure A-3) that will accompany 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 will check the holding times for requested analyses so that they are not <br />exceeded. <br />The following procedures will be used during sampling and analysis to provide chain -of -custody <br />control during sample handling from collection through storage. Sample documentation will <br />include the use of the following: <br />• Field logbook to document sampling activities in the field <br />• Labels identifying individual samples <br />I <br />SAC\.S:\WES\S&APROC.DOC-95\w:1 5 <br />