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Attachment A i Page 3 D. SAMPLE CUSTODY This section describes standard operating procedures for sample custody and custody documentation. Sample custody procedures will be followed through sample collection,transfer, analysis, and ultimate disposal. The purpose of these procedures is to assure that(1)the integrity of samples is maintained during their collection,transportation, and storage prior to analysis and (2) post-analysis sample material is properly disposed of. Sample custody is divided into field procedures and laboratory procedures, as described below. DA Field Custody Procedures Sample quantities, types, and locations will be determined before the actual fieldwork commences. As few personnel as possible will handle samples. The field sampler is personally responsible for the care and custody of the collected samples until they are properly transferred. D.1.1 Field Documentation Each sample will be labeled and sealed properly immediately after collection. Sample identification documents will be carefully prepared so that identification and chain-of-custody records can be maintained and sample disposition can be controlled. Forms will be filled out with waterproof ink. The following sample identification documents will be utilized. The following sample identification documents will be utilized. ► Sample labels ► Field notebook ► Chain-of-custody forms D.1.2 Sample Labels Sample labels provide identification of samples. Preprinted sample labels will be provided. Where necessary,the label will be protected from water and solvents with clear label-protection tape. Each label will contain the following information: Name of collector Date and time of collection ► Place of collection ► PEM project number E p J ► Sample number ► Preservative (if any) D.1.3 Sample Labels Information pertinent to a field survey, measurements, and/or sampling must be recorded on field data sheets. Entries on data sheets should include the following: ► Name and title of author, date and time of entry, and physicallenvironmental conditions during field activity. ► Location of sampling or measurement activity. ► Name(s) and title(s)of field crew. ► Type of sampled media (e.g., soil, ground water, air, etc.). ► Sample collection or measurement method(s). ► Number and volume of sample(s)collected. ► Description of sampling point(s). ► Description of measuring reference point(s). ► Date and time of collection or measurement. ► Sample identification number(s). ► Sample preservative (if any). ► Sample distribution (e.g., laboratory). ► Field observations/comments. ► Field measurement data(pH, etc.).