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To maintain rhain-of-custody,each person in custody of the sample will sign,date,and note time on the form. Samples will not be left unattended unless placed in a sealed container secured with custody seals, with the chain-of-custody record inside the container. 4.5.2 Custody Seals Custody seals are used to detect unauthorized tampering of samples following sample collection,up to the time of analysis.The seal will be attached so that it must be broken to open the sample shipping container. Seals will be affixed to each shipping container(i.e.,each ice chest)before the samples leave i the custody of the sample personnel. A seal will include the following information: Sampler's signature • Date of collection 4.5.3 Field Log Book All information pertinent to the field survey or sampling effort will be recorded in a log book or equivalent standardized form. Each page/form will be consecutively numbered. All entries will be made in indelible ink and all corrections will consist of line-out deletions that are initialed and dated. Entries in a log book may include the following: • Purpose of sampling • Location and description of the sampling point • Details of the sampling site(e.g.,distance from a permanent feature) • Name and address of field contact • Documentation of procedures for preparation of reagent or supplies which become an integral part of the sample(e.g.,field blanks) • Identification of sampling crew members • Type of sample (e.g.,groundwater) • Number and volume of sample taken • Sample type taken (e.g.,primary sample,replicate,field blank,and travel blank) • Sampling methodology • Sample preservation • -Date and time of collection • Weather conditions • Sample distribution and how transported (e.g.,name of the laboratory and shipping agent) • Reference such as maps of the sampling site • Field observations • Any field measurements made + Signature and date by the personnel responsible for observations + Decontamination procedures Sampling situations vary widely. No general rules can specify the extent of information that must be entered into a log book or standardized form. However,records will contain sufficient information so that the sampling activity can be reconstructed without relying on the collector's memory. CATEMPMORKPLrw_DCA_1.DOC 12