Guidance
Release Characterization
- Release Characterization Guidance (December 2025)
- Multiple Lines of Evidence Guidance (February 2026)
- Water Supply Well Receptor Guidance Document (Sept 2009, rev. Jan 2015)
- Considerations for Assessing Ecological Risks (EPA, RCRA, March 2015)
- RCRA Corrective Action Ecological Receptor Exposure Pathway Scoping Checklist (Nov 2013)
- Ecological Risk Assessment
- Connecticut ECO maps - Aquifer Protection Areas, Natural Diversity Database sites, soil type, surface and groundwater quality
- Guidance Document for Pollutant Mobility Criteria Exception for Groundwater Infiltration (Nov 2013)
Transition to New Programs
- Property Transfer Program Transition Information Sheet (January 2026)
Sampling and Analysis
- EPA Region 4 - Design and Installation of Monitoring Wells
- ASTM - Standard Practice for Design and Installation of Groundwater Monitoring Wells
- Use of Filters for Groundwater Sampling Technical Memorandum and Guidance (May 2012)
- EPA Low Stress (low flow) / Minimal Drawdown Groundwater Sample Collection
- Guidance for Collecting and Preserving Soil and Sediment Samples for Laboratory Determination of Volatile Organic Compounds (Feb 2006)
- Quality Assurance and Quality Control
- Laboratory Quality Assurance and Quality Control Guidance (May 2009, rev. Dec 2010, rev. April 2024)
- Reasonable Confidence Protocols Guidance (Nov 2007, rev. Dec 2010, rev. March 2024)
- Reasonable Confidence Protocols (Dec 2006, May 2024)
Demonstrating compliance
- Guidance for Calculating the 95% Upper Confidence Level for Demonstrating Compliance with the Remediation Standard Regulations (May 2014)
- Groundwater Compliance Monitoring Factsheet (Nov 2014, rev. Oct 2015)
- EPA Recommended Summary Checklist for a Superfund Monitored Natural Attenuation Evaluation for Groundwater (Feb 2025)
- Remediation Stewardship Permits
- Alternative Groundwater Protection Criteria Map (GIS)
- Release Remediation Closure Report Guidance - coming soon
Other considerations
- Trichloroethylene (TCE) Developmental Risks - joint guidance from DPH and DEEP (Feb 2015)
- Emerging Contaminants
- PFAS Information for Environmental Professionals
- Polychlorinated Biphenyls
- Guidance Document for Rendering Soil Inaccessible Using Pavement (Nov 2013)
- Regulatory Clarification: Asphalt Millings are Not Clean Fill (Oct 2006)
- General Guidance on Development of Former Agricultural Properties (March 1999)
- Guidance for Utility Company Excavation (Jan 2001)
- Green Remediation
Underground Storage Tanks
DEEP Concurrence with ITRC Technical Guidance Documents
The Interstate Technology and Regulatory Council (ITRC) is a public-private coalition with members from all 50 states and the District of Columbia. It produces documents and training to broaden and deepen technical knowledge and expedite quality regulatory decision-making while protecting human health and the environment. Because ITRC guidance are written for a national audience, the guidance cannot reflect the individuality of state environmental rules. DEEP recommends users carefully consider how the guidance interrelate to Connecticut’s laws and regulations. DEEP has prepared Concurrence documents for certain ITRC guidance to assist environmental practitioners in applying technical advances described by ITRC guidance documents to the remediation of Connecticut sites in conformance with the Remediation Standard Regulations.
- DEEP Concurrence with ITRC Technical and Regulatory Guidance for In Situ Chemical Oxidation of Contaminated Soil and Groundwater, Second Edition, January 2005 (Oct 2016)
- DEEP Concurrence with ITRC Technical and Regulatory Guidance titled
Vapor Intrusion Pathway: A Practical Guideline, January 2007 (Oct 2017) - DEEP Concurrence with ITRC Technical and Regulatory Guidance titled Integrated DNAPL Site Strategy (IDSS-1); November 2011 and Integrated DNAPL Site Characterization and Tools Selection (ISC-1); April 2015 (Mar 2018)
Content Last Updated March 11, 2026