This is the eighth in a series of blog posts discussing key features of Connecticut’s new release-based cleanup regulations (the “RBCRs”), R.C.S.A. § 22a-134tt-1 et seq.
As remediation projects are planned and performed, the big question is: “How clean is clean enough?” This post discusses remediation standards under the RBCRs, and how those standards will change from the standards in use today.
Sites being remediated under the Transfer Act must achieve compliance with the Remediation Standard Regulations or RSRs set forth at R.C.S.A. § 22a-133k-1 et seq. The RSRs set forth the concentrations of various substances that are permitted to be present in soil and groundwater.
These standards vary depending on context. For example, at a site that is limited to industrial or commercial use, soil contamination is permitted at higher levels than would be the case for a site that might be in residential use. This is because soil standards are set based on exposure assumptions, and a child playing in the yard would have greater exposure to soil than an adult at work. Similarly, when a site has groundwater that is used or may be used as drinking water, the standards are more stringent than when the groundwater has already been deemed not suitable for drinking.
The RSRs also provide a number of pathways to compliance that serve as alternatives to achieving the numerical standards set forth in the regulations. For example, soil that is contaminated above the numerical criteria is permitted to remain in place, subject to a restriction recorded on the land records called an environmental use restriction (or EUR), when it is under a building and therefore protected from human exposure and movement caused by rain.
These familiar features of the RSRs will remain in place after March 1, 2026. In fact, substantially all of the text of the RSRs will be moved from where it currently resides in R.C.S.A. § 22a-133k-1 et seq. to the new RBCRs at R.C.S.A. § 22a-133tt-1 et seq. The existing RSR sections will be replaced with a cross-reference to the new location in the RBCRs where substantially the same text will reside. In other words, sites being remediated under the Transfer Act, and releases being remediated under the RBCRs, will be working toward the same set of standards.
Changes to Remediation Standards and Approaches
There are a few changes being made to the remediation standards as we transition from the RSRs to the RBCRs. In addition to the familiar residential and commercial/industrial categories, the RBCRs provide numerical soil standards for two new land use categories:
- Managed Multifamily: The managed multifamily criteria will be available for parcels with 4 or more dwelling units, provided such dwelling units are managed by an association or a professional property management company. The idea is that such a professional management company can provide rules (like no vegetable gardening for example), intended to keep people safe from residual soil contamination.
- Passive Recreation: The passive recreation criteria apply to sites subject to an environmental use restriction or conservation easement prohibiting any residential use except passive recreation. Currently, recreation is considered to be a residential activity. Therefore, a property traversed by a bike trail would not be eligible for industrial/commercial standards, because the bike trail would be said to constitute a residential use. Passive recreation is recreation that uses trails or roads for activities such as running, hiking, biking, and horseback riding. Use of specific areas for a sustained period of time, like sports fields and beaches, are not considered passive recreation. Once again, the idea is that these sorts of low-touch activities are less risky than true residential use of property.
The RBCRs also provide a streamlined process for allowing certain impacted soil to remain in place if it is inaccessible under a building, or a concrete or asphalt surface. If specified criteria are met, such soil can remain in place provided the property owner maintains the covering in good condition, regularly inspects it, provides reports on its maintenance, and properly manages soil that might be exposed during a maintenance activity. An affidavit explaining the situation must be recorded on the land records, but this is expected to be a simpler process than the process required to secure an environmental use restriction. A similar streamlined pathway is available to allow on-site management of historically impacted material, i.e., soil that has been historically intermixed with coal ash, wood ash, coal fragments, coal slag, coal clinkers, or asphalt paving fragments.
With that context, we can clear up a common source of confusion. Many have wondered if the RBCRs are applicable to Transfer Act sites. While certain provisions of the RBCRs are not applicable to Transfer Act sites (like reporting and tiering), the remediation standards of the RBCRs, including the new provisions, are applicable to Transfer Act sites.
In our next posts, we will discuss closure documentation.