Engineered Control Variances
Engineered Control Guidance Document (Effective April 1, 2009)
The February 2009 (Revised November 2010, January 2013) Engineered Control Guidance Document (ECGD) has been developed by the Connecticut Department of Energy & Environmental Protection, Bureau of Water Protection and Land Reuse, Remediation Division (DEEP), with support from the Environmental Professionals’ Organization of Connecticut (EPOC).
An Engineered Control is a permanent physical structure designed to safely isolate pollutants which would otherwise not comply with the self-implementing remedial options allowed in the Connecticut Remediation Standard Regulations (RSRs). The ECGD includes a description of what is eligible to be considered as an Engineered Control under section 22a-133k-2(f)(2) of the RSRs, a description of the information necessary for the preparation of complete and approvable applications, a step-by-step outline of the review and approval process, and supplemental resources provided in the appendices.
Engineered Control Guidance Document (PDF)
Engineered Control Database
Below is a link to the initial version of the Engineered Control Database that is mentioned in the Engineered Control Guidance Document. Records within the database are a work in progress and will be updated from time to time. The database requires Microsoft Access 2007 or later to open. If you do not have Microsoft Access, you can view the database using Microsoft Access 2007 Runtime, available free on the Microsoft Website
This database provides a partial list of engineered controls (under section 22a-133k-2(f)(2) of the RSRs) that have been approved by the Remediation Division in the past. It will provide stakeholders with examples of ECs previously approved, including information regarding ECs’ nature and design characteristics and the classes of contaminants being addressed under the EC. Information in this database is provided as a convenience; more complete information is available in the DEEP public file room. Environmental professionals should review appropriate site-specific information regarding those previous approvals and reference such information in the application to promote consistency and efficiency. The information in this database is intended for general information only and is not to be relied upon as a guarantee of the likelihood for future approval.
Please direct any questions or comments regarding the engineered control database to Claire Foster
of the Remediation Division.
Engineered Control Variance Forms
All four forms must be submitted when applying for an Engineered Control Variance.
The Approval Request or Notice Transmittal Form must accompany Part 1 and Part 2 of the EC Application and is used for project tracking purposes.
- Approval Request or Notice Transmittal Form (Word / PDF)
There are two parts to the Engineered Control Application. Part 1 of the Application presents the conceptual EC and supporting information. Part 2 of the Application presents the detailed engineering design, implementation schedule, operation and maintenance plan, and financial assurance.
- Engineered Control Application Form, Part 1 (Word / PDF)
- Engineered Control Application Form, Part 2 (Word / PDF)
Pursuant to section 22a-133k-2(f)(2)(A)(iv) of the RSRs, verification of public notice is required.
- Public Notice Verification Form (Word / PDF)
Engineered Control Financial Assurance Tools
- Financial Assurance Calculator (Excel)
- Performance Bond Template (Word / PDF)
- Conditions for Approval of Performance Bond (PDF)
- Letter of Credit Template (Word / PDF)
- Conditions for Approval of Letter of Credit (PDF)
- Letter of Credit Cover Letter Template (Word / PDF)
If you have any questions related to Engineered Controls, please call the Remediation Division at (860) 424-3705.
Content Last Updated March 5, 2013