Remediation Site Clean Up

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• Requesting Approval of Additional Polluting Substances and Alternative Criteria

  The Remediation Standard Regulations (RSRs), contain numeric cleanup standards for 88 substances. When a contaminant at a site is not one of the 88 substances, Additional Polluting Substance (APS) criteria must be approved by the Commissioner to complete cleanup at the site under the RSRs. When the RSRs contain criteria for a substance but a party believes different numeric criteria are appropriate for a specific site, that party may request approval of Alternative Criteria.

• Wave 2 Revision Concepts and History

  The Department of Energy and Environmental Protection (DEEP) presented proposed concepts in the RSR Wave 2 Conceptual Language document, as well as at multiple question and answer sessions and accepted public feedback regarding revisions to the Remediation Standard Regulations.

• 1996 RSR Criteria Derivation

  The Remediation Standard Regulations that established the requirements for the remediation of contamination within Connecticut were organized by environmental media and relied, in part, on risk-based criteria that established remediation goals for various contaminants typically found at remediation sites.

• Removal from SEMS Potential Superfund List

  If remedial action has been completed through one or more DEEP Remediation Programs or an interested party has committed to remediate a site through a DEEP Remediation Program, DEEP can request that the Environmental Protection Agency (EPA) remove any active federal superfund site from the Superfund Enterprise Management System (SEMS), formerly CERCLIS or that EPA offer a "comfort letter" stating it will not take further action to list the site on the NPL.

• State Superfund Program

  The State Superfund Program oversees and provides funding for the remediation of contaminated sites. The use of State funds for remediation at hazardous waste sites is determined by calculating a superfund priority score in accordance with Connecticut Regulations.

• Federal Superfund Sites in Connecticut

  Information on the Federal Superfund sites in Connecticut.

• GAC Filter System for Private Wells

  GAC filter systems are used to remove semi-volatile and volatile organic compounds (such as those found in gasoline, heating oil, and chlorinated solvents), as well as some pesticides, from polluted drinking water. Explanation of how these systems work, maintenance, and monitoring of GAC systems.

• Licensed Environmental Professional (LEP) Verification Audit Program

  The purpose of the Licensed Environmental Professional (LEP) Verification Audit Program is to ensure that the opinions ("verifications") of the LEP are based on an appropriate understanding of the environmental conditions of the site and that the verification is in compliance with all applicable statutes and regulations, including the Remediation Standard Regulations (RSRs).

• Siting Clean Energy on Brownfields

  Renewable energy, such as wind and solar, can be sited on land that has been or is perceived to be polluted and is now underused. These properties, called brownfields, may be particularly attractive because these types of renewable energy installations may require large sites, and brownfields are usually large sites located in areas with the existing infrastructure needed to support development.

• Technical Impracticability Variance

  A Technical Impracticability Variance is a remedial option provided under the Connecticut Remediation Standard Regulations (RSRs) when non-aqueous phase liquids cannot be contained or removed in accordance with Section 22a-133k-2(g) of the RSRs, remediation to the extent technically practicable has reduced the concentration of pollutants in groundwater to steady-state concentrations, or as otherwise specified in EPA guidance.

• Guidance

  Connecticut Department of Energy & Environmental Protection Remediation Division guidance documents

• Introduction to Per- and Polyfluoroalkyl Substances (PFAS)

  Per- and polyfluorinated alkyl substances are a group of over 4,000 manmade chemicals, collectively referred to as PFAS, that have recently entered the national spotlight as emerging contaminants with serious adverse impacts on human health, even at low concentrations in the parts per trillion range.

• 1,4-Dioxane

  Information on 1,4-dioxane, including industrial uses, analytic methods, behavior in the environment, and links to additional information on 1,4-dioxane.

• Contaminants of Emerging Concern

  An emerging contaminant is a chemical or material characterized by a perceived, potential, or real threat to human health or the environment or by a lack of published health standards. General information on emerging contaminants, as well as perchlorate, nanomaterials, and pharmaceuticals and personal care products.

• Environmental Clean-up Programs and General Information

  Links to additional information about remediation and contaminated sites in Connecticut.