Builds upon the 2012 version (ISM-1) and reflects advancements in technology in the ensuing eight years.

An updated ITRC guidance (ISM-2) was developed and posted in the fall of 2020. The ISM-2 Update Team clarified inappropriate or inconsistent information in ISM-1 is as seen in the attached statement.  Please review this document before downloading the ISM-1 PDF.

In 2009, ITRC established a technical team to evaluate incremental sampling methodology (ISM) for sampling soils at hazardous waste sites and potentially contaminated properties. This 2012 guidance analyzes ISM performance, identifies considerations for unique laboratory processes and procedures, evaluates the suitability of ISM to various contamination scenarios and contaminant categories, and identifies the strengths and weaknesses of ISM. It includes a January 2020 Clarification Statement.