This guidance provides practitioners with recommendations for planning, collecting, processing, and interpreting incremental samples to obtain more representative and reproducible data.

Clarification of information in Incremental Sampling Methodology (ISM-1, 2012) that is outdated, inconsistent, or potentially misleading. Please review this statement before reading the ISM-1 document.

Practical recommendations for planning, designing, implementing, and evaluating in situ remediation projects.

Evaluates the performance of incremental sampling methodology, explains sampling design and laboratory considerations, and discusses its applicability to different contaminants and site conditions.

An overview of how to characterize, remediate, and monitor contaminated fractured rock sites, including developing conceptual site models, selecting tools, designing monitoring programs, and evaluating remediation strategies.

Explains how to incorporate bioavailability of contaminants in soil into human health risk assessments by reviewing key concepts, methods, and tools for developing site-specific bioavailability values to improve exposure estimates.

Introduces a six-step remedy selection framework to assist decision-makers in identifying which contaminated sediment remedial technology is most favorable for a site.

Assists users without statistical expertise to understand groundwater statistical methods and apply statistical tools throughout each stage of a groundwater project. Includes common statistical methods, relevant study questions, and software tools.

This online guidance document assists state regulators and practitioners in understanding and incorporating the fundamental concepts of bioavailability in contaminated freshwater or marine sediment management practices.