ASTM E1848-20

4.1 This guide assumes that a decision has been made that an ecological risk assessment is required for a contaminated site. In some cases, this decision could be made before any site data are collected. See Fig. 1.

4.2 The selection of assessment endpoints (defined as ecological values to be protected) and measurement endpoints (ecological characteristics related to the assessment endpoints) is a critical step in conducting an ecological risk assessment. Endpoint selection identifies those effects which are ecologically significant and not merely those that are adverse, thus providing a more rational and defensible basis for making risk and remedial decisions.

4.3 This guide provides an approach for identifying, selecting and using assessment and measurement endpoints in an ecological risk assessment for a contaminated site. This guide has been developed because there is no universal, simple measure of ecological health analogous to measures used in human health risk assessment. Assessment and measurement endpoints have to be identified and selected from a variety of individual circumstances on a stressor-, ecosystem- and scale-specific basis. It is important to recognize that a diverse set of ecological endpoints could be required for a specific site. EPA/100/F15/005 Generic Ecological Assessment Endpoints (GEAEs) For Ecological Risk Assessment: Second Edition With Generic Ecosystem Services Endpoints Added. July 2016)

4.4 This guide is intended to be used primarily by a biologist, ecologist, ecotoxicologist, or a team of environmental scientists during problem formulation and work plan development prior to initiating data collection activities at a contaminated site (3-8, 10).

4.5 Ecological risk assessment is usually an iterative process. In many circumstances it proceeds as a series of tiers, that is, desktop/screening, preliminary, and detailed/focused phases. This guide can be used to refine or modify assessment and measurement endpoints developed in earlier phases of the process.

4.6 This guide can be used whenever assessment and measurement endpoints must be identified and selected following an initial or preliminary problem formulation/planning phase:

4.7 This guide is intended to be used in the evaluation of baseline conditions (current and future) and in the evaluation of conditions resulting from remedial actions or corrective measures.

1.1?This guide covers an approach to identification, selection, and use of ecological endpoints (both assessment and measurement endpoints) 1.2?This guide addresses only the identification, selection, and use of assessment and measurement endpoints, not the full range of activities that occur in an ecological assessment or ecological risk assessment at a contaminated site (1, 3-8). These activities are addressed in other ASTM guides and references provided at the end of this guide.

1.3?This guide is intended to identify assessment and measurement endpoints to be used for screening, preliminary, focused, detailed, and quantitative ecological risk assessments conducted in a linear or iterative fashion 1.4?This guide is intended to be used by trained biologists, ecologists, and ecotoxicologists familiar with risk assessment, and ecological and ecotoxicological concepts.

1.5?This guide (including Appendix X1) consists of a series of options or instructions and does not recommend a specific course of action or provide detailed guidelines to be followed at all sites. See 2.2.2 of Regulations Governing ASTM Technical Committees.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.