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B.2.5.1. Procedure for Using Sample Labels <br /> • Complete the sample label before attaching it to the sample container. <br /> • Use reproducible ink to complete the required label information. <br /> • The minimum information required on the sample label shall include: <br /> • Date the sample was collected <br /> • Time at which the sample was collected <br /> • Attach the preprinted sample label. <br /> • Maintain a record of samples collected and other pertinent information on the Field Data <br /> Sheet. <br /> B.3. Standard Practice for Chain of Custody Control and Physical Security of <br /> Samples <br /> B.3.1. Scope <br /> This procedure describes the documentation required for tracing sample custody and the <br /> requirements for maintaining physical security of samples. <br /> B.3.2. Terminology <br /> Chain of custody record — A Chain of Custody Form (Figure 4) or equivalent used to document <br /> sample custody and receipt. <br /> Custody — to maintain a sample in sight, in immediate possession, or locked under one's <br /> personal control. <br /> Custody seals or tags — Adhesive-backed strip fastened to the sample container or the <br /> shipping container in such a way as to demonstrate that no tampering with the sample has <br /> occurred. Custody seals also may be manufactured in the field by using paper strips and clear <br /> plastic tape. <br /> Duplicate samples — More than one sample collected from the same source location, but <br /> placed in separate containers. <br /> Physical security — Synonymous with custody, but emphasizes the measures taken to prevent <br /> tampering with the samples or sampling process. <br /> Sample — a portion of material collected from a larger mass or to select and collect a sample. <br /> Technician — an individual trained to do a specific task. <br /> B.3.3. Significance and Use <br /> All personnel shall use this procedure for chain of custody control and physical security of <br /> samples unless an approved alternate procedure is included or referenced in the official project <br /> records. <br /> Daub &Associates, Inc. Page B-5 Natural Soda LLC 2022 SAP <br />