Guidance
Release Characterization
- Release Characterization Guidance (December 2025)
- Multiple Lines of Evidence Guidance (February 2026)
- Water Supply Well Receptor Guidance Document (January 2015)
- Considerations for Assessing Ecological Risks (EPA, RCRA, March 2015)
- RCRA Corrective Action Ecological Receptor Exposure Pathway Scoping Checklist (November 2013)
- Ecological Risk Assessment
- Environmental Cleanup Comprehensive Map Viewer - An online ArcGIS tool to view geospatial information related to environmental cleanups
- Connecticut ECO maps - Aquifer Protection Areas, Natural Diversity Database sites, soil type, surface and groundwater quality
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 (February 2006)
- Selection of Analytical Methods for Petroleum Releases (May 2026)
- Analytical Methods for Petroleum Releases
- Quality Assurance and Quality Control
- Data Quality Assessment and Data Usability Guidance(June 2024)
- Reasonable Confidence Protocols Guidance (March 2024)
- Reasonable Confidence Protocols (May 2024)
Demonstrating compliance
Release Remediation Closure Report Guide (June 2026) – describes how to demonstrate a release has been cleaned up to the RBCRs. Use for ERRs, SERs, newly discovered existing releases, site-wide remediation, and for releases that are not required to be reported per RCSA 22a-134tt. ERR guide notes describe suitable documentation for ERRs.
- Guidance for Calculating the 95% Upper Confidence Level for Demonstrating Compliance with the Remediation Standard Regulations (May 2014)
- EPA Recommended Summary Checklist for a Superfund Monitored Natural Attenuation Evaluation for Groundwater (February 2025)
- Remediation Stewardship Permits
- Alternative Groundwater Protection Criteria Map (GIS)
Other considerations
- REACT User Guide (February 2026)
- Trichloroethylene (TCE) Developmental Risks - joint guidance from DPH and DEEP (February 2015)
- Emerging Contaminants
- PFAS Information for Environmental Professionals
- Polychlorinated Biphenyls
- Guidance Document For Evaluating Potential Hydrogeologic Impacts Associated With Blasting & Development Activities (December 2019)
- General Guidance on Development of Former Agricultural Properties
- Guidance for Utility Company Excavation
- Green Remediation
Underground Storage Tanks
Content Last Updated October 2, 2026