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4.3.3.1 Field Logbook. The most important aspect of sample custody and <br /> documentation is thorough, accurate record keeping. Consistent with <br /> previous investigations, all information pertinent to sampling will be <br /> recorded in a bound logbook with consecutively numbered pages. All entries <br /> in logbooks and on sample documentation forms will be made in waterproof <br /> ink and corrections will consist of line out deletions that are initialed <br /> and dated. Entries in the logbook will include at a minimum: <br /> o Location of sample point. <br /> o Number and volume of samples taken. <br /> o Description of sampling methods. <br /> o Date and time of collection. <br /> o Sample identification. <br /> o Name of laboratory where samples shipped. <br /> o Field observations. <br /> o Field measurements of sample (e.g. temperature, specific <br /> conductance, pH) . <br /> o Name(s) of person(s) collecting the sample. <br /> Photographs may be taken of sampling locations. When such photographs <br /> are taken, they will include the surrounding area and reference objects, as <br /> well as an informational sign identifying the sample number, the roll <br /> number, the frame number, the date, and the time. This information will <br /> also be documented in the field logbook. <br /> 4.3.3.2 Chain-of-Custody. To ensure integrity of the samples from the <br /> time of collection to reporting of analytical results, documentation of <br /> chain-of-custody is required. The components of the custody procedure <br /> include: sample labels, sample custody seals, field log (as discussed in <br /> Section 4.3.3.1) , sample analysis request sheet, and chain-of-custody <br /> record. <br /> A-4 <br />