Guidance & Documents

"I refer to ITRC guidance documents on a monthly basis. The documents are always well written and easy to follow. I really like the web-based interactive format of newer guidance. We often share the information we have learned from ITRC resources amongst each other in internal meetings and these meetings spark many productive discussions. These discussions have been valuable in mentoring our junior staff."
                - William Flinchum, P.G., R.S.M., SynTerra Corporation
ITRC publishes and produces guidance documents and training courses that help state environmental agencies and others gain valuable technical knowledge and develop consistent regulatory approaches for reviewing and approving specific technologies. These include technical overviews, case studies, and technical and regulatory guidance documents.

These documents are written and reviewed by teams of environmental professionals, including state and federal environmental regulators, federal agency representatives, industry experts, community stakeholders, and academia. All ITRC documents undergo a rigorous external review, and all external comments and team responses are captured and posted to the team ITRC Connect community.

Library Entry List
137 Entries
6 months ago



Sustainable Resilient Remediation (SRR) is an optimized solution to cleaning up and reusing a hazardous waste site that limits negative environmental impacts, maximizes social and economic benefits, and creates resilience against increasing threats. The objective of this SRR guidance is to provide resources for regulators, stakeholders, consultants and responsible parties to help integrate sustainability and resilience practices into remediation projects.


7 months ago



Cyanobacteria are microscopic, photosynthetic organisms that are found naturally in all aquatic environments. Under certain conditions, cyanobacteria can multiply and become very abundant, discoloring the water throughout a water body or accumulating at the surface; these occurrences are known as blooms. This ITRC guidance discusses key aspects of harmful cyanobacterial blooms management that waterbody managers and other interested parties should consider as they respond to these events.


10 months ago



Technical Resources for Vapor Intrusion Mitigation (VIM) is designed to aid state regulators in understanding various mitigation strategies, how they are installed and fundamentally work, and what factors to consider as part of the review process. This document is intended to guide regulators and project managers through the critical elements of selection, design, implementation, and operation of VIM.


one year ago



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.


one year ago



This updated Incremental Sampling Methodology (ISM-2) web-based document builds upon the 2012 version (ISM-1) and reflects advancements in technology in the ensuing eight years.  ISM-type investigation methods have evolved, and regulators have gained more experience in the application of ISM in the field and in the laboratory. The original 2009 survey of regulators and industry environmental experts was updated with current information on ISM practices to measure progress and understand what obstacles are still being encountered.

This document is formatted as a website that is not meant to be printed. You can access the web document at any time from the ITRC website or you can bookmark the link. If you would like to print, please enter the document website and then use the "Print" button to print. Some of the web-based documents allow you to print either the entire document or a subsection.

The updated document includes multiple examples of site scenarios for DU designation and the collection of ISM samples under different field conditions. A separate section on the use of ISM investigation methods to support human health and ecological risk assessments has been added and the simulations in the original appendices have been updated and include a recent study on Student t and Chebyshev discussion of UCL. Current case studies are summarized to provide insight into the potential applications, benefits, and challenges of the approach from recent sites.


one year ago



This Interstate Technology and Regulatory Council (ITRC) online document includes the PFAS Technical and Regulatory Guidance Document, PFAS Fact Sheets and Explainer Videos, Training Module Videos and external tables of data and information prepared by the ITRC PFAS Team. The document is designed specifically to support state and federal environmental staff, as well as others (including stakeholders, project managers, and decision makers), to gain a working knowledge of the current state of PFAS science and practice. The web-based nature of this document lends itself to updating of key information in this rapidly evolving subject. It is the intention of ITRC to periodically update the document as significant new information about PFAS develops. The guidance document can be downloaded as a PDF.


one year ago



This updated web-based document offers an interactive learning experience, containing embedded links to supplementary documents and resources designed to help develop an effective, integrated strategy to manage remediation of sites contaminated with chlorinated solvents.


one year ago



This document includes a brief overview of risk communication, walks through the steps in developing a communication plan and stakeholder outreach activities, presents an overview of risk communication concepts, applies these principles in case studies, and includes various tools to facilitate risk communication plan development. The Additional Information section includes various tools to facilitate risk communication plan development and stakeholder outreach activities. This toolkit is applicable to current, immediate, and emerging environmental issues and concerns. Tools are generally applicable to environmental issues and concerns. This toolkit will be updated with links to case studies published by future ITRC teams.


one year ago



ITRC has developed a resources to summarize the latest science and emerging technologies for 1,4-Dioxane.


one year ago



Comprehensive guidance on common in situ remediation challenges, including remedial design, implementation, and monitoring.