Guidance & Documents

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. See the latest ITRC Product List, Updated in July 2023, for a list of all of ITRC's published products. 

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. ITRC will consider a lack of response during the 45-day external review period to signify no serious objection to the content within the product.


Knowledge Map

ITRC's QUEST Knowledge Map is an interactive tool for navigating ITRC's environmental guidance documents and resources, allowing users to filter through ITRC's vast library based on concise subjects.

Guidance Documents
143 Entries
8 years ago



This guidance document is a resource to inform regulators, responsible parties, other problem holders, consultants, community stakeholders, and other interested parties of the critical concepts related to characterization approaches and tools for collecting subsurface data at DNAPL sites.


8 years ago



Assists effective decision-making among state, local, and federal project managers and decision makers tasked with developing or reviewing risk assessments for contaminated sites using site-specific approaches, scenarios, and parameters. The document discusses commonly encountered issues organized around seven risk-assessment subjects (planning, data evaluation, toxicity, exposure assessment, risk characterization, risk management, and risk communication) when site-specific alternatives are proposed, and provides options for addressing these issues. Links to resources and tools that provide more detailed information on the specific issues and potential options are also provided. Community members and other stakeholders may find this document helpful for understanding and using risk assessment information to make better environmental decisions.

8 years ago



This ITRC petroleum vapor intrusion (PVI) guidance document provides an 8-step process for the effective assessment and management of vapor intrusion at sites contaminated with petroleum hydrocarbons. The guidance presents a method of screening petroleum-contaminated sites for potential vapor intrusion, as well as providing the tools and strategies that offer the most efficient means of evaluating the vapor intrusion pathway at these sites. The fundamental principle of this screening method is the “vertical separation distance,” which was developed using empirical data from hundreds of petroleum-contaminated sites. Use of separation distance to screen petroleum-contaminated sites allows managers to better focus scarce resources on sites with greater potential for petroleum vapor intrusion.

9 years ago



The objective of this guidance document is to assist decision-makers in identifying which contaminated sediment remedial technology is most favorable for a site based upon an evaluation of site-specific physical, sediment, contaminant, and land and waterway use characteristics. A six-step remedy selection framework is provided to help the user identify favorable technologies and remedial alternatives. Additional factors that need to be considered as part of the evaluation process are summarized (e.g. feasibility, cost, stakeholder and local governments concerns, and others).

9 years ago



The Groundwater Statistics and Monitoring Compliance (GSMC) web-based guidance is designed to help users without deep statistical expertise to understand the statistical techniques and methods related to groundwater cleanup and how to use them in all project life cycle stages: release detection, site characterization, remediation, monitoring and closure. The GSMC web-based technical and regulatory guidance document brings clarity to the planning, implementation, and communication of groundwater statistical methods and should lead to greater confidence and transparency in the use of groundwater statistics for environmental site management.

9 years ago



This web based guidance document provides a format that is easy to navigate through an in-depth analysis and overview of Biochemical Reactors (BCRs) for mining influenced water (MIW). The guidance uses a decision tree to understand the applicability given a number of site and influent parameters, testing, design, construction and monitoring. BCRs can be designed to address a wide range of flows, acidity, and metals loading and also can be designed to operate in gravity flow or available powered mode. The decision tree presents the basic factors used to evaluate the efficacy and applicability of BCR treatment for a particular MIW, while several case studies also included in the document present a clear evaluation of diverse site conditions and detailed analysis and evaluation of several different chemical mixtures.
#Biochemical Reactors for Treating Mining-Influenced Water (MIW)

10 years ago



Three fact sheets provide basic information about geophysical classification for munitions response.

10 years ago



The Environmental Molecular Diagnostics (EMD) web-based guidance describes a group of advanced and emerging techniques used to analyze biological and chemical characteristics of environmental samples. EMDs have applications in each phase of environmental site management and provide additional lines of evidence for making better decisions. The guidance document provides descriptions of each of the major EMDs, along with case studies of their uses and recommendations regarding the appropriate uses of these techniques. The EMD web-based guidance document will help you to understand how EMDs could benefit your site management decisions.

11 years ago



Applies the framework of project risk management for site remediation to identify and manage such challenges.

11 years ago



Assists the remediation industry with the integration of green and sustainable practices into existing site investigation and remediation programs.