Removal Action Under CERCLA: Categories, Limits, and Process

A removal action under CERCLA is a short-term cleanup response the EPA or another lead agency takes to address an immediate or near-term threat from a release, or threatened release, of hazardous substances. It is the fast lane of the Superfund program: measures meant to abate, contain, stabilize, or eliminate a hazard quickly, often long before the years-long remedial process can produce a permanent fix.

CERCLA Section 101(23) defines removal actions broadly, and the implementing regulations at 40 CFR 300.415 flesh out what a lead agency can do and how it must go about it. The underlying authority runs through several CERCLA sections: Section 104 for Fund-financed responses, Section 106 for enforcement, and Section 122 for settlements with responsible parties.¹ Executive Order 12580, signed in 1987, delegated the president’s response authorities to the EPA and the Coast Guard, with individual agency heads picking up authority over releases at federal facilities under their jurisdiction.²

What Counts as a Removal Action

The regulation lists a wide range of activities that can qualify. They span everything from putting up a fence to hauling contaminated soil off site:

Site control measures such as fencing, warning signs, and access restrictions.
Containment and stabilization, including capping contaminated soils, shoring up berms and impoundments, and controlling drainage.
Physical removal of contaminated soil, drums, barrels, tanks, and other bulk containers.
Chemical treatment to slow the spread of contamination or reduce its effects.
Containment, treatment, incineration, or disposal of hazardous materials.
Providing alternative water supplies to affected communities.
Temporary evacuation or relocation, coordinated through FEMA or state and local authorities.¹

A removal action can be the first step at a site, an interim step during a longer investigation, or, occasionally, the final cleanup if it fully resolves the contamination.

Removal Action vs. Remedial Action

The line between a removal action and a remedial action is one of the most consequential distinctions in Superfund practice. Removal actions are short-term responses to immediate threats. Remedial actions, defined in CERCLA Section 101(24), are designed as permanent or long-term solutions.³

A remedial action moves through a long procedural pipeline: preliminary assessment, site investigation, listing on the National Priorities List, a remedial investigation and feasibility study, a Record of Decision picking the remedy, remedial design, construction, and years of operation and maintenance.³ A removal action can begin within hours of a threat determination.

The classification also drives the statute of limitations for cost recovery suits. The EPA has three years from completion of a removal to sue for its costs, and six years from the start of physical on-site construction for a remedial action. There is an important overlap: if a remedial action begins within three years of a removal’s completion, removal costs can be recovered under the longer remedial timeline.⁴

The Three Categories of Removal Actions

Removal actions are sorted into three categories based on how quickly work must begin. The classification determines what planning documents are required and how much public process attaches to the response.

Emergency Removal Actions

These are the most urgent, used when on-site activity must start within hours or days. An On-Scene Coordinator can launch the response on verbal authorization using a delegated spending authority (historically $200,000). If the OSC invokes that authority, an Action Memorandum documenting the decision must be prepared within one week of the start of the action.⁵ For very short-duration emergencies where work begins within hours and ends within 30 days, the administrative record only needs to be available at a central location.⁶

Time-Critical Removal Actions

A time-critical removal applies when on-site work must start within six months of the site evaluation, but the situation is not an hours-or-days emergency. No Engineering Evaluation/Cost Analysis is required, though the lead agency prepares an appropriate work plan.⁷ The administrative record must be available for public inspection within 60 days of the start of on-site activity, and a public comment period of at least 30 days follows.⁸

Non-Time-Critical Removal Actions

When at least six months of planning time is available before work needs to begin, the removal is non-time-critical, and the process becomes considerably more involved. The lead agency must prepare an Engineering Evaluation/Cost Analysis (EE/CA) that identifies cleanup objectives and analyzes alternatives based on cost, effectiveness, and how readily each can be put into practice.⁹ The EE/CA goes out for public comment for at least 30 days, and the agency must respond in writing to significant comments before finalizing its chosen approach in an Action Memorandum.¹⁰ Costs of the EE/CA itself are treated as CERCLA Section 104(b)(1) studies and do not count against the statutory spending ceiling.

Spending Cap and Duration Limit

Removal actions paid for by the Hazardous Substance Superfund are generally capped at $2 million in obligations or 12 months from the start of on-site activity, whichever comes first.¹¹ Investigative and planning activities do not count against these ceilings.

The EPA can exceed the limits under two exemptions. The first is the emergency exemption: the agency must find an immediate risk to public health, welfare, or the environment; determine that continued response is needed to prevent or mitigate the emergency; and confirm that no other entity will provide timely assistance. The second is the consistency exemption: the continued removal must be appropriate and consistent with a future remedial action at the site.¹¹ Regional Administrators can approve spending up to $6 million under the emergency exemption; anything higher requires approval from EPA Headquarters.¹⁰

How EPA Decides to Take a Removal Action

Before authorizing a removal, the lead agency evaluates whether a threat to public health, welfare, or the environment exists. The National Contingency Plan lists several factors that guide the call:

Actual or potential exposure of people, animals, or the food chain to hazardous substances.
Contamination of drinking water supplies or sensitive ecosystems.
Hazardous substances stored in drums, barrels, tanks, or other containers that could release.
High concentrations of hazardous substances in surface soils that could migrate.
Weather conditions that could cause contamination to spread.
Risk of fire or explosion.
Whether other federal or state response mechanisms are available.¹

The agency must also make an initial effort to identify potentially responsible parties and determine whether they can carry out the removal promptly and properly before committing Superfund dollars.¹¹

The Action Memorandum

The Action Memorandum is the primary decision document for any removal action. It records why a response is needed, describes the proposed action, explains the rationale, authorizes spending, and becomes part of the administrative record.¹²

A standard Action Memorandum covers the type and purpose of the action, site conditions and background, the roles of state and local authorities, a description of the threats to public health or the environment measured against the NCP’s criteria, an endangerment determination, the proposed actions and estimated costs, the expected consequences of inaction, any outstanding policy issues, and an enforcement section. The On-Scene Coordinator drafts the memorandum, which then goes through regional management review. For Fund-financed actions up to $2 million, the Regional Administrator approves. Actions above $2 million, or those raising nationally significant issues, require Headquarters concurrence.¹²

Enforcement and Responsible Parties

The EPA operates under an “enforcement first” policy for removal actions, meaning it looks to get potentially responsible parties (PRPs) to perform or pay for the cleanup before committing taxpayer-funded resources.¹³ A responsible party is any individual, business, or government entity found liable for contamination at a site, whether as an owner, operator, generator of waste, or transporter.

The process typically starts with information request letters to gather data about a party’s involvement, followed by general and special notice letters outlining potential liability and the EPA’s cleanup plans. If a party is willing to negotiate, the EPA can enter into an Administrative Settlement Agreement and Order on Consent, letting the party do the work under EPA oversight. If a party refuses to settle and an immediate threat exists, the EPA can issue a Unilateral Administrative Order compelling action.¹⁴ In emergencies, the EPA often performs the work itself and pursues cost recovery afterward.

Public Participation Requirements

Every removal action carries baseline community involvement obligations, and they scale with the duration and category of the action. In all cases, the lead agency must designate a spokesperson, notify affected citizens and state and local officials, and establish an information repository containing the administrative record.¹⁵

Sites where on-site activity runs past 120 days trigger additional steps: the agency must conduct community interviews, prepare a formal Community Relations Plan, and inform the public about the information repository.¹⁵ Non-time-critical actions carry the heaviest public engagement, because the EE/CA must go through a 30-day comment period before the agency selects a response. The agency must also publish notice of the administrative record’s availability and respond in writing to significant public comments.⁶

What Happens After the Removal

A removal action is not a substitute for long-term cleanup. Where the removal does not fully address the threat at a site, the lead agency must ensure what the regulations call an “orderly transition” to remedial activities.¹ In practice, the removal stabilizes the site and eliminates the most acute risks while the much longer remedial investigation and feasibility study determines a permanent fix. Both types of action must comply, to the extent practicable, with applicable or relevant and appropriate requirements under federal and state environmental law.¹¹

1
eCFR. 40 CFR 300.415 – Removal Action
2
National Archives. Executive Order 12580
3
U.S. EPA. CERCLA and Federal Facilities
4
U.S. EPA. CERCLA Cost Recovery Statute of Limitations Memorandum
5
U.S. EPA. Superfund Removal Procedures – Response Management
6
eCFR. 40 CFR Part 300 Subpart I – Administrative Record
7
NAVFAC. Removal Action – CERCLA Phases and Milestones
8
Cornell Law Institute. 40 CFR 300.820 – Administrative Record for Removal Actions
9
U.S. EPA. Non-Time-Critical Removal Action Procedures
10
U.S. Coast Guard NPFC. EPA Removal Action Procedures
11
Cornell Law Institute. 40 CFR 300.415
12
U.S. EPA. Superfund Removal Procedures – Action Memorandum Guidance
13
U.S. EPA. Finding Potentially Responsible Parties
14
U.S. EPA. How the Superfund Enforcement Process Works
15
U.S. EPA. Community Relations Requirements for Removal Actions