1.1 This guide focuses on the selection of sediment background reference areas from aquatic environments for the purpose of determining representative sediment background concentrations. These concentrations are typically used in contaminated sediment corrective actions performed under various regulatory programs, including the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). Although many of the references cited in this guide are CERCLA oriented, the guide is applicable to remedial actions performed under local, state, tribal, federal, and international cleanup programs. However, this guide does not describe the requirements for each jurisdiction.

1.2 This guide provides a framework to select appropriate sediment background reference areas for collection of sediment data in the determination of representative sediment background concentrations. It is intended to inform, complement, and support, but not supersede, local, state, tribal, federal, or international guidelines.

1.3 Methodologies used to determine representative background concentrations at contaminated sediment sites are not discussed in this guide—refer to Guide E3242 for a discussion of these methodologies.

1.4 Related ASTM Standards—This guide is related to Guide E3242, which provides a framework for determination of representative sediment background concentrations, including statistical and geochemical considerations. This guide is also related to Guide E3164, which addresses corrective action monitoring before, during, and after sediment remediation activities, as well as Guide E3163, which concerns sediment sampling and analytical techniques used during sediment corrective action projects. Guide D4823, which concerns sediment core sampling, is also related to this guide.

1.5 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this guide.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.