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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. <br />Page B-5 Natural Soda LLC 2015 S A P <br />