United States
Environmental Protection
Agency
Solid Waste and
Emergency Response
(5305W)
PB96-963 217
EPA540-R-96-009
OSWER Directive 9205.5-05
March 1996
4>EPA RCRA/UST, Superfund, & EPCRA
Hotline Training Module
Introduction to;
Superfund Liability, Enforcement,
and Settlements
Updated as of November 1995

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DISCLAIMER
This document was developed by Booz-Allen & Hamilton Inc. under contract 68-W0-0039 to EPA. It is intended
to be used as a training tool for Hotline specialists and does not represent a statement of EPA policy.
The information in this document is not by any means a complete representation of EPA's regulations or policies.
This document is used only in the capacity of the Hotline training and is not used as a reference tool on Hotline
calls. The Hotline revises and updates this document as regulatory program areas change.
The information in this document may not necessarily reflect the current position of the Agency. This document
is not intended and cannot be relied upon to create any rights, substantive or procedural, enforceable by any
party in litigation with the United States.
RCRA/UST, Superfund & EPCRA Phone Numbers:
National toll-free (outside of DC area)
Local number (within DC area)
National toll-free for the hearing impaired (TDD)
(800) 424-9346
(703) 412-9810
(800) 553-7672
The Hotline is open from 9 am to 6 pm Eastern Standard Time,
Monday through Friday, except for federal holidays.

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SUPERFUND LIABILITY, ENFORCEMENT, AND SETTLEMENTS
CONTENTS
1.	Introduction	1
2.	Regulatory Summary	3
2.1	Definitions	3
2.2	Liability			6
2.3	Enforcement	14
2.4	Settlements	18
2.5	Cost Recovery	22
2.6	Relationship to Remedial and Removal Actions	24
3.	Summary	27


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Superfund Liability, Enforcement and Settlements -1
1. INTRODUCTION
The objective of CERCLA is to reduce and eliminate threats to human health and
the environment posed by contaminants at uncontrolled hazardous waste sites.
To meet this objective, CERCLA created:
•	A hazardous waste site response program, and
•	A comprehensive liability scheme that authorizes the government to hold
persons who caused or contributed to the contamination problem liable
for the cost or performance of cleanups.
Congress also created a revolving trust fund (the Hazardous Substance Superfund)
from which the President could draw funds to respond to releases and threatened
releases of hazardous substances from CERCLA-defined facilities.
CERCLA provides EPA with three basic options for cleaning up a hazardous waste
site:
•	Under §§104 and 107, EPA can cleanup the site using Superfund money,
and later recover cleanup costs from potentially responsible parties (PRPs)
•	Under §106, EPA can order, or ask a court to order, PRPs to cleanup the site
•	Under §122, EPA can enter into settlement agreements with PRPs that
require PRPs to cleanup the site or pay for a cleanup under §107.
EPA has adopted an "enforcement first" policy for the cleanup of CERCLA sites. As
a matter of policy, when a site requires remediation under CERCLA and the PRPs
for the site are identified, EPA will first require the PRPs to conduct the site cleanup
(either through a settlement agreement or through the issuance of §106
administrative orders) rather than conduct the cleanup with Superfund money.
Many of the questions the Hotline receives on liability, enforcement, and
settlements are purely legal and beyond our scope. We do not interpret or apply the
law or legal concepts to particular situations, nor do we supply information on case
law. We only answer questions relating to statutory and regulatory authority, and
explain how these tools are used as part of the CERCLA process.
The goal of this module is to describe the liability, enforcement, and settlement
provisions of CERCLA. When you have completed this module, you should be able
to:
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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2 - Superfund Liability, Enforcement and Settlements
•	List the CERCLA enforcement mechanisms available to EPA
•	Explain CERCLA §§104 and 106 provisions
•	Define "potentially responsible party"
•	Explain CERCLA §107 liability
•	Cite and locate the relevant CERCLA documents on enforcement and
liability
•	Explain the differences between administrative and judicial enforcement
and settlement procedures
•	List and compare the differences between enforcement authorities as they
apply to removal and remedial actions
•	List the key enforcement steps in EPA's response process
•	Specify noncompliance penalties and provide statutory citations.
Use this list of objectives to check your knowledge of this topic after you complete
the training session.
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements - 3
2. REGULATORY SUMMARY
Congress provides EPA authority in CERCLA to take direct action to respond to
releases or threatened releases of hazardous substances that could endanger public
health or welfare ot the environment. EPA may also take legal action to force
parties responsible for causing contamination to clean up these sites or reimburse
the Superfund for the costs of a federally-funded cleanup. The Superfund program
is based on the premise that those responsible for the hazardous substances at a site
should bear the burden of the cleanup. If, however, those responsible for
contaminating a site cannot be found or are unable to clean up a site, EPA can use
Superfund money to finance the response action. EPA also has the option of using
Superfund money to conduct a response action and later pursue cost recovery from
responsible parties should the circumstances at the site warrant immediate action.
SARA's passage in 1986 significantly strengthened CERCLA's enforcement
provisions by incorporating enforcement tools to facilitate settlement negotiations
and enforcement measures to encourage or compel responsible party cleanups.
Mechanisms to pursue cost recovery from liable parties for an EPA-funded response
action were also enhanced.
One useful resource for information on Superfund liability, enforcement, and
settlements is the Enforcement Project Management Handbook (OSWER Directive
9837.2B). As a Superfund Information Specialist, you will find the answers to many
questions will be based on the language found in guidance documents. Since the
provisions of CERCLA are imposed on a site-by-site basis, very few answers to
callers' questions are found in the regulations. The Enforcement Project
Management Handbook is a compilation of existing guidance and serves as an
important tool for locating information on specific topics.
The following is an overview of the CERCLA provisions for liability, enforcement,
and settlements. The module addresses each of these topics under separate
headings.
2.1 DEFINITIONS
Familiarity with the following terms is key to understanding this module.
ADMINISTRATIVE ORDER
An administrative order (AO) is a legal document, issued by an administrative
agency like EPA, compelling a party to act and prescribing the activities the
potentially responsible party (PRP) must undertake. Under CERCLA §106, EPA can
order, or ask a court to order, PRPs to cleanup the site. It usually sets the completion
date for the cleanup process, as well as discrete deadlines for actions leading up to
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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4 - Superfund Liability, Enforcement and Settlements
that date. The AO includes provisions for oversight by the lead agency and for
associated costs. An AO may be "on consent" (AOC) if the agreement results from
successful negotiations and is signed by both the PRP and EPA; however, the statute
prohibits the use of AOCs for remedial actions. If the PRP is not cooperative, EPA
has the authority to issue a unilateral administrative order (UAO) compelling the
PRP to conduct the ordered activities. An AO, whether on consent or unilateral, is
ordered and signed by EPA.
CONSENT DECREE
A consent decree is a legal document, approved by a judge, which formalizes an
agreement reached between EPA and the PRP(s). The consent decree states when
PRPs will perform all or part of a site cleanup and what actions PRPs are required to
perform. An announcement of the consent decree must be published in the Federal
Register for public comment prior to its approval by a judge. Under §122, remedial
actions must be performed by the PRPs pursuant to the terms of a consent decree.
COST RECOVERY
Cost recovery is the legal process by which EPA pursues parties liable under
CERCLA §107(a) in order to recover money spent by the federal government on
response actions.
"DE MICROMIS" WASTE CONTRIBUTOR
A "de micromis" waste contributor is a PRP who is deemed by a settlement
agreement to be responsible for only minuscule amounts of waste at a CERCLA site.
EPA coined this term to denote a subset of de minimis waste contributors (OSWER
Directive 9834.17).
DE MINIMIS LANDOWNER
A de minimis landowner is a PRP who is deemed by a settlement agreement to be
the past or present owner of property on which a facility is located, but who did not
conduct or permit the handling of any hazardous substances at the facility and who
did not contribute to the release of hazardous substances at the facility (CERCLA
§122(g)(l)(B)).
DE MINIMIS WASTE CONTRIBUTOR
A de minimis waste contributor is a PRP whose contribution to the hazardous
substance release is minimal in volume and toxicity in comparison to the other
wastes at that site (CERCLA §122(g)(l)(A)). The expedited settlement agreement for
such a contributor specifies the party is responsible for only a minor portion of the
response costs.
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements - 5
GENERAL NOTICE LETTER
A general notice letter is a formal notice from EPA informing PRPs of their
potential liability for past and future response costs at a CERCLA site. Either before
or along with this notification, EPA may also include an information request to
determine the extent of PRP liability (CERCLA §104(e)).
INNOCENT LANDOWNER
An innocent landowner is a person who, after making "appropriate inquiry" into
previous ownership and uses of the property, purchased or acquired the property
without knowledge of the presence of hazardous substances on the property. PRPs
may assert this claim as a defense to liability under CERCLA §107(b)(3).
LIEN
A lien is a claim or charge on property for the payment of some debt, obligation, or
duty. CERCLA §107 authorizes the federal government to impose a lien on a PRP's
property subject to a response action.
MIXED FUNDING AGREEMENT
A mixed funding agreement is a settlement agreement whereby EPA settles with
less than all the PRPs for less than 100 percent of the response costs (CERCLA
§122(b)). The three types of mixed funding agreements (preauthorization, cash-out,
and mixed work) are discussed further in Section 2.4 of this module.
POTENTIALLY RESPONSIBLE PARTY
A potentially responsible party (PRP) is an individual or entity including past or
present owners, operators, transporters, or generators any or all of whom may be
liable under CERCLA §107(a).
SPECIAL NOTICE LETTER (SNL)
EPA uses SNLs under CERCLA §122(e) to initiate formal settlement negotiations for
a response action. EPA has discretion to use the special notice procedure when it is
believed the procedure will bring about negotiations that will result in a settlements
between EPA and PRPs for a site. EPA may issue separate SNLs for operable units at
a remedial site if doing so will facilitate an agreement and expedite the remedial
action. CERCLA §122(e)(l)(A) requires EPA to provide the names and addresses of
PRPs, the volume and nature of substances contributed by each PRP identified, a
ranking by volume of the substances at the facility to PRPs whenever available.
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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6 - Superfund Liability, Enforcement and Settlements
2.2 LIABILITY
This section addresses the key factors in determining CERCLA liability. Liability is a
broad legal term that describes the appropriation of responsibility among conflicting
parties. To be held liable is to be subject to an obligation or be held responsible for a
possible or actual loss, penalty, expense, or burden. Under CERCLA, liability may be
tied to property ownership as well as to generation of hazardous substances, and can
entail a duty to pay money (e.g., assessment costs) or to perform an act immediately
or in the future (e.g., conduct a cleanup). Responsible parties that are held liable pay
for the environmental damage they have caused.
WHAT CREATES LIABILITY
CERCLA §104(a) authorizes EPA to respond to a release or substantial threat of
release into the environment of hazardous substances, or a pollutant or
contaminant.
•	Under CERCLA §101(22), "release" is broadly defined and includes "any
spilling, leaking, pumping, pouring, emitting, emptying, discharging, injecting,
escaping, leaching, dumping, or disposing into the environment."
•	Under CERCLA §101(8), "environment" is broadly defined and includes surface
water, ground water, land surface or subsurface strata, and ambient air within
the United States or under jurisdiction of the United States.
•	Under CERCLA §101(14), "hazardous substance" is any substance EPA has
designated for special consideration under the Clean Air Act, the Clean Water
Act, the Toxic Substances Control Act, and the Resource Conservation and
Recovery Act. EPA also may designate additional substances as hazardous
substances under CERCLA. EPA maintains and updates a list of hazardous
substances in 40 CFR Part 302.
•	Under CERCLA §101(33), "pollutant or contaminant" is any other substance not
on the list of hazardous substances which "will or may reasonably be
anticipated to cause" adverse effects in organisms or their offspring.
A number of releases or threatened releases do not trigger CERCLA response
authorities. Under CERCLA §101(14), Congress excluded petroleum, crude oil,
natural gas, and synthetic gas from the definitions of hazardous substance and
pollutant or contaminant. As a result, releases solely of petroleum, crude oil,
natural gas, and synthetic gas into the environment do not trigger CERCLA
response authorities, although they may be regulated under other environmental
statutes such as the Oil Pollution Act. Under CERCLA §101(22), several types of
activities are excluded from the definition of release and are not subject to CERCLA
response actions. These include:
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements - 7
•	Workplace exposures covered by the Occupational Safety and Health Act
(OSHA)
•	Vehicular engine exhausts
•	Certain radioactive contamination covered by other laws
•	Normal application of fertilizer.
Under CERCLA §104(a)(3), Congress limits and generally disallows use of the Trust
Fund to finance federal response to releases of:
•	Naturally occurring substances (such as radon) from locations where they are
normally found
•	Products (such as asbestos) that are part of the structure of, and result in
exposure within residential, business, or community structures
•	Substances (such as lead) in public or private drinking water supplies due to
deteriorating pipes.
CERCLA §101(10) defines releases, such as the discharge of pollutants in compliance
with a National Pollutant Discharge Elimination System (NPDES) permit under the
Clean Water Act, that qualify as federally permitted releases. Although EPA has full
authority under CERCLA to respond to federally permitted releases, the permittee is
not liable for cleanup costs of such releases.
WHO MAY BE LIABLE
CERCLA §107(a) casts an extremely broad net in defining those persons that can be
liable for the costs of responding to a release or the threat of a release of hazardous
substances. The types of parties that can be held liable are:
•	The current owners or operators of the facility or vessel
•	Former owners or operators of the facility or vessel, if they owned the
property at the time of disposal
•	Those who arrange for treatment or disposal of hazardous substances at a
facility (in most cases, the generators)
•	Those who accept hazardous substances for transport to treatment or
disposal sites.
Anyone involved in the management of hazardous substances, from production to
final disposal and beyond, can be held liable. It is the responsibility of the enforcing
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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8 - Superfund Liability, Enforcement and Settlements
agency or the court to determine the degree of liability and amounts of monetary
payments for any and all responsible parties. It is important to note that CERCLA
liability is retroactive, meaning that persons may be held liable for releases that
occurred prior to the enactment of the statute in 1980.
TVPUC Ar f T AUTT FFV
JL Irto VJr LiADlLl i Y
Two types of liability are imposed under CERCLA. The first, strict liability, is the
assessment of legal responsibility without regard to fault or diligence. To hold a
party strictly liable, the government must only prove that the PRP meets the
statutory definition of liability, regardless of the party's intent, knowledge, or
purpose. The government does not have to prove that the PRP acted in a negligent
manner; the government needs only prove that the PRP is in one of the four
statutory classes of liable parties found in §107, and that the release or threat of a
release of a hazardous substance occurred at the facility.
The second type of liability under CERCLA, joint and several liability, has been
applied by many courts in CERCLA cases. Joint and several liability means that if
the harm at the site is indivisible, such as unmarked, intermingled drums or
commingled wastes, any and every PRP at the site may be liable for the entire
cleanup cost, regardless of the amount of waste the PRP actually contributed to the
site. If the harm at the site is divisible, then the burden of apportioning the harm is
on the PRPs. The PRP who pays all or part of the costs of a site cleanup, however,
does have the right to sue other parties that may have been responsible, and to force
them to contribute funds (see CERCLA §113(0)- In resolving contribution claims,
the courts may allocate response costs among liable parties using equitable factors as
appropriate. In general, however, EPA's practice is to attempt to identify and notify
all PRPs and issue orders or litigate against the largest contributors.
AMOUNT OF LIABILITY
There are four types of costs outlined in §107(a)(4) for which responsible parties may
be held liable: costs of removal and remedial actions plus interest; other necessary
response costs plus interest; damages for injury to natural resources plus interest;
and health assessment costs plus interest. Section 107(c)(1) specifies limits to the
dollar amounts of liability that may be imposed on an owner or operator. For
facilities, this amount equals the total of all response costs plus $50,000,000 for any
damages. There are specific limits set forth for different types of vessels as well. In
any case, if the responsible party was guilty of willful misconduct or is
uncooperative, that party can be held liable for the full costs of the response and
damages.
A responsible party who fails to clean up a site when issued an administrative order
under §106 may potentially be held liable in an amount at least equal to, and not
more than three times, the cost incurred by the government as a result of such
failure to take proper action under §107(c)(3) (treble damages). Liability for punitive
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements - 9
damages incurred under this section cannot be transferred to another party even by
a contractual agreement (§107(e)).
DEFENSES TO LIABILITY
Defenses are legal arguments or factual claims raised in a lawsuit to prove why a
PRP should not be held liable. Section 107(b) specifies the defenses PRPs may raise
to avoid liability for the cost of a response. There are only three:
•	An act of God (e.g., a hurricane or earthquake)
•	An act of war
•	An act of omission of a third party who is not an employee or an agent of the
defendant, and does not have a contractual relationship with the defendant.
The first two defenses are fairly self-explanatory; a description of the third defense
follows.
THE THIRD-PARTY DEFENSE: THE "INNOCENT LANDOWNER"
The third-party defense is used most frequently, and is often called the "innocent
landowner" provision. This defense rebuts the presumption of liability that runs
with ownership of land by claiming the landowner made a good faith effort to
discover any contamination. The defendant has the burden of proof. There is no
set formula for proving the third-party defense: it is determined by the facts, on a
case-by-case basis. The court scrutinizes the defendant's relationship to the property,
specifically whether the defendant knew or had reason to know of the disposal of
hazardous substances at the facility. The elements of the defense are found in
§§ 107(b)(3) and 101(35). The defendant raising the third-party defense must be free of
both actual or inferred knowledge and any contractual relationship concerning the
property, except as allowed under §101 (35)(A). A person who acquires contaminated
property and who can satisfy the requirements of §107(b)(3) and §101(35) may be able
to establish a defense to liability. Guidance on landowner liability and on the type of
investigation a buyer should perform prior to purchasing property in order to
demonstrate "due care" can be found in the August 18, 1989, Federal Register (54 FR
34235). In addition, the third-party defense may come into play where a person is
the victim of a so-called "midnight dumper."
EXEMPTIONS TO LIABILITY
Unlike defenses, which are legally allowable arguments that must be proved and do
not guarantee a bar to liability, an exemption automatically grants a release from
liability if the conditions of the exemption are met. Four exemptions from CERCLA
liability are discussed below.
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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10 - Superfund Liability, Enforcement and Settlements
Secured Creditor
The definition of owner/operator in CERCLA §101(20)(A) excludes persons whose
ownership rights in a facility are held primarily to protect a security interest.
Holding a security interest means having a legal claim of ownership in order to
secure a loan, equipment, or other debt rather than retaining ownership for
purposes of profit or business. This exclusion protects those persons, such as private
and governmental lending institutions (i.e., banks), who may maintain a right of
ownership or guarantee loans for facilities which may become contaminated with
hazardous substances, from potential liability under §107 as an owner or operator.
This exclusion also may protect those persons who acquire title to or ownership of
contaminated property by an involuntary transfer or acquisition (i.e., through an
inheritance).
The interpretation of the security interest exemption generated uncertainty within
the financial and lending communities, particularly with regard to the extent to
which a secured creditor may undertake activities to oversee the facility for the
purposes of protecting the security interest without incurring liability under §107.
To meet the provisions of the security interest exemption, a holder may not
participate in any management activities.
As part of its policy, EPA developed a two-pronged test outlining activities
considered participation in management. The first prong evaluates the actions that
are participation in management. A lending institution, or holder, participates in
management if it exercises decision-making control over a borrower's
environmental compliance, or exercises control at a level comparable to that of a
manager of a borrower's facility, such that the holder has responsibility for overall
day-to-day decision making. For example, a holder performing the functions of a
plant manager or operations manager would be participating in management.
To meet the criteria of the second prong of the two-pronged test, a holder must not
participate in the management of the borrowing facility. An example of an action
that would not qualify as participation in management is a lender's requirement
that a borrower come into compliance with applicable federal, state, or local
environmental regulations. The reconstruction and renegotiation of the terms of a
security interest, such as requiring payments of additional rent or interest, also
would not qualify as participation in management.
In the policy, EPA also clarified the applicability of the lender liability provision to
government entities. The Agency generally will exempt from CERCLA liability as
an owner or operator a unit of state or local government that involuntarily acquires
contaminated property. A government entity that involuntarily acquires
contaminated property and meets the requirements described below will have a
third-party defense to CERCLA liability.
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements -11
The requirements for a third-party defense to CERCLA liability are the following:
•	The contamination occurred before the government entity acquired the
property
•	The government entity exercised due care with respect to the contamination
(e.g., did not cause, contribute to, or exacerbate the contamination)
•	The government entity took precautions against certain acts of the party that
caused the contamination and against the consequences of those acts.
A government entity will not have a CERCLA liability exemption or defense if it
has created or contributed to the release or threatened release of contamination
from the property. As a result, acquiring property involuntarily does not
unconditionally or permanently insulate a government entity from CERCLA
liability. The liability exemption and defense described above do not shield
government entities from any potential liability that they may have as generators or
transporters of hazardous substances under CERCLA. For more information see
Policy on CERCLA Enforcement Against Lenders and Government Entities that
Acquire Property Involuntarily, September 22, 1995, and The Effect of Superfund on
Involuntary Acquisitions of Contaminated Property by Government Entities,
December 1995.
Service Station Dealers
Under CERCLA §114(c), service station dealers managing recycled oil are exempt
from certain liability provisions if the dealer meets specific requirements. The
exemption is applicable to generator and transporter liability under §107(a)(3) and
(4), and covers claims for cost recovery under §107. The service station dealer still
may be held liable under §107(a)(l) and (2) as an owner and operator.
State And Local Governments
Except for gross negligence or intentional misconduct, state and local governments
are not liable for costs or damages resulting from an emergency response to a
hazardous substance release. Additionally, any person rendering care or assistance
pursuant to the NCP cannot be held liable for damages resulting from such care.
Contractors
Response action contractors (RACs) and state or local government employees are
protected from liability, except in cases of negligence, gross negligence, or intentional
misconduct.
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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12 - Superfund Liability, Enforcement and Settlements
EPA's DISCRETIONARY POLICIES ON LIABILITY
The Agency exercises its discretion in deciding whether to pursue certain parties
who might otherwise be construed as one of the types of liable parties under §107(a)
enforcement actions. The Agency has issued several policies concerning the liability
of such parties. These policies are described below.
Residential Homeowner
In July, 1991, EPA released its Policy Toward Owners of Residential Property at
CERCLA Sites (OSWER Directive 9834.6). The policy states that enforcement actions
will not be taken against owners of residential property located on Superfund sites.
The policy applies to properties that are owned and used exclusively for single
family residences of one to four units. Furthermore, the owner's knowledge of the
presence of contamination on the property at the time of purchase or sale shall not
affect EPA's enforcement discretion. A potential exception to this policy would be if
a homeowner's activities resulted in a release of a hazardous substance.
Owners of Property Above Contaminated Aquifers
Where hazardous substances have come to be located on or in a property solely as
the result of subsurface migration in an aquifer from a source or sources outside the
property, EPA will not take enforcement action against the owner of such property
to require the performance of response actions or the payment of response costs.
This policy is subject to the following conditions:
•	The landowner did not cause, contribute to, or exacerbate the release or threat
of release of any hazardous substances, through an act or omission. The
failure to take affirmative steps to mitigate or address groundwater
contamination, such as conducting groundwater investigations or installing
groundwater remediation systems, will not, in the absence of exceptional
circumstances, constitute an omission by the landowner within the meaning
of this condition.
•	The person that caused the release is not an agent or employee of the
landowner, and was not in a direct or indirect contractual relationship with
the landowner. Cases where the landowner acquired the property, directly or
indirectly, from a person that caused the original release, will require an
analysis of whether, at the time the property was acquired, the landowner
knew or had reason to know of the disposal of hazardous substances that gave
rise to the contamination in the aquifer.
•	There is no alternative basis for the landowner's liability for the
contaminated aquifer, such as liability as a generator or transporter under
CERCLA §107(a)(3) or (4), or liability as an owner by reason of the existence of
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements -13
a source of contamination on the landowner's property other than the
contamination that migrated in an aquifer from a source outside the property.
For more information, see Policy Toward Owners of Property Containing
Contaminated Aquifers. May 24,1995.
Municipalities
EPA will generally not pursue generators and transporters of primarily municipal
solid waste and sewage sludge. However, the Agency may pursue parties whose
municipal waste includes hazardous substances from commercial, institutional, or
industrial processes or activities. Municipalities that are named as PRPs, however,
will be treated in the same way as private parties in the settlement process. This
includes municipalities that are owners and operators of Superfund sites. For more
information see Interim Policy on CERCLA Settlements Involving Municipalities
or Municipal Wastes (OSWER Directive 9834.13).
Prospective Purchasers
It is EPA's policy not to become involved in private real estate transactions,
however, EPA might consider entering into an agreement with a prospective
purchaser if it will have substantial benefits for the government and the prospective
purchaser satisfies specific criteria. The Agency recognizes that entering into an
agreement with a prospective purchaser of contaminated property, given
appropriate safeguards, may result in an environmental benefit through a payment
for cleanup or a commitment to perform a response action. EPA's experience has
shown that prospective purchaser agreements have also benefited the community
where the site is located by encouraging the reuse or redevelopment of property at
which the fear of Superfund liability may have been a barrier. EPA has adopted a
policy which expands the circumstances under which prospective purchaser
agreements may be considered.
EPA may reject any offer if it determines that entering into an agreement with a
prospective purchaser is not sufficiently in the public interest to warrant expending
the resources necessary to reach an agreement. The following criteria should be
considered when evaluating prospective purchaser agreements:
•	EPA action at the facility has been taken, is ongoing, or is anticipated to be
undertaken by the Agency
•	EPA will receive a substantial benefit either in the form of a direct benefit for
cleanup, or as an indirect public benefit in combination with a reduced direct
benefit to EPA
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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14 - Superfund Liability, Enforcement and Settlements
•	Continued operation of the facility or new site development, with the
exercise of due care, will not aggravate or contribute to the existing
contamination or interfere with EPA's response action
•	Continued operation or new development of the property will not pose
health risks to the community and those persons likely to be present at the
site
•	The prospective purchaser is financially viable.
For more information see Guidance on Agreements with Prospective Purchasers of
Contaminated Property, May 24,1995.
De Micromis Parties
CERCLA provides the Agency with the authority to enter into settlements at any
time with persons who may have contributed minuscule amounts of hazardous
substances to a Superfund site. In appropriate circumstances, EPA may want to offer
a de micromis settlement to certain parties who contribute hazardous substances to
Superfund sites. The Agency generally will consider as de micromis parties those
generators or transporters who contribute minuscule amounts of hazardous
substances to a Superfund site. De micromis contributor settlements are not
available to owners or operators of Superfund sites.
In any de micromis settlement the Agency's goal will be to "cash out" those settlors
at the earliest possible time. To "cash out" means that the PRP will pay the portion
of their response costs up front. As with any other de minimis settlement, a de
micromis settlement must involve only a minor portion of the total, estimated
response costs at the facility concerned. For more information see Guidance on
CERCLA Settlements with De Micromis Waste Contributors, OSWER Directive
9834.17.
SCOPE OF CERCLA §107
The liability provisions established in §107 specify who is or may be liable for the
costs of a response action for a release of a hazardous substance. Section 107
identifies those parties associated with a release; however, it does not identify the
amount of money an owner, operator, generator, or other PRP will specifically pay.
How much each PRP will pay and the extent of PRP contribution to site cleanup
depends on the specific enforcement and settlement decisions EPA makes.
2.3 ENFORCEMENT
One goal of the Superfund enforcement program is to make responsible parties pay
for the environmental damage they have caused. Ideally all PRPs would conduct
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements -15
and pay for cleanup from the beginning. Frequently, however, the situation is an
emergency and there is not time to search for PRP(s) and ensure they take
responsibility for their action. In these cases EPA acts immediately, taking a "Fund-
lead" action, which uses federal money from the Superfund, and subsequently
pursues PRPs for cost recovery. When the situation permits, EPA policy is to seek
action by the responsible party before expending Fund resources. When this
happens the action is referred to as an "enforcement-lead" or "PRP-lead" action.
CERCLA provides a broad range of enforcement authorities that EPA can use to
meet the goals of the Superfund program. These include authorities to search a
PRP's property, order PRPs to clean up sites, negotiate settlements with PRPs to fund
or perform site cleanup, and to take legal action if the PRPs do not perform or pay
for cleanup. Figure 1 presents the steps initiated by EPA in the enforcement process.
Figure 1
ENFORCEMENT PROCESS
Initiate
PRP
Search
Issue Special
Notice Letters
Issue General
Notice Letters
Exchange
Information
YES
Negotiate
Settlement
PRP
Cleanup
Response
Negotiations
.Successful?
• RI/FS Negotiations with a
60-90 Day Response
Moratorium
NO
• RD/RA Negotiations with
a 60-120 Day Response
Moratorium
YES
Issue
UAO
PRP
Response
Compliance?
NO
Initiate Other
Enforcement
Options
•	Refer §106 Case
•	Seek Treble Damages
•	Use Fund and Refer §107 Case
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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16 - Superfund Liability, Enforcement and Settlements
FRF IDENTIFICATION
To identify the parties responsible for site contamination, EPA conducts an
extensive search. PRP searches include activities such as site file searches, state
agency and EPA file reviews, title searches, and the construction of a history of
operations that occurred at the site. The PRP search does not necessarily need to be
completed before a list of potential parties is drawn up. In addition, EPA may issue
information request letters to parties who may have information about the site,
such as the names and addresses of owners or operators, the types of wastes found at
the site, and/or possible generators and transporters associated with the site. Once
EPA has enough information to identify parties as potentially liable for
contamination at a site, EPA issues a general notice letter to each PRP notifying
them of their potential liability (CERCLA §104(e)). After the PRPs are notified of
their potential liability, EPA begins an informal information exchange concerning
site conditions, PRP connections to the site, and the identification of other PRPs
(53 FR 5298; February 23,1988).
SPECIAL NOTICE PROCEDURE
Based on information obtained during the PRP search and information exchange
process, EPA may choose to issue SNLs to PRPs. CERCLA §122(e) contains special
notice procedures designed to facilitate formal negotiations with PRPs. The SNL
includes the names and addresses of other PRPs, the volume and nature of
substances each PRP contributed, and a ranking of the substances by volume.
Issuance of an SNL triggers a period of time called a moratorium, during which
certain EPA actions at the site may not be taken (CERCLA §122(e)(2)(A)). This time
period lasts for 60 days and may be extended in certain circumstances described
below.
NEGOTIATIONS
The goal of the moratorium is to reach a settlement in which the PRPs agree to
conduct or finance response activities. If within 60 days the PRPs make a good faith
offer to conduct the response action, the moratorium may be extended up to an
additional 60 days to provide time for reaching a final settlement. If a settlement is
reached, the PRPs may conduct the response action under a consent decree or an
administrative order on consent with EPA or with EPA contractor oversight
(§122(d)(3)). If there is no good faith offer or if negotiations fail, EPA may conduct
the response action (§122(e)(4)).
PENALTIES
In addition to being liable for the costs of cleaning up contaminated sites, PRPs can
also be subject to penalties under CERCLA. Failure to comply with an
administrative order or a violation of the NCP can result in the assessment of an
administrative (civil) penalty or a criminal charge. Penalties assessed directly by
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements -17
EPA are administrative. Penalties assessed by the court at the Agency's request are
generally referred to as judicial (civil) penalties. The following are examples of
penalties to which PRPs may be subject.
Under CERCLA §109(a), Class I administrative penalties of not more than $25,000
per violation may-be assessed for failure to comply with the following provisions:
•	Sections 103(a) and (b); relating to release notification requirements
•	Section 103(b); relating to destruction of facility records
•	Section 108; relating to financial responsibility
•	Sections 122(d)(3) and 122(1); relating to settlement agreements for
response actions under §104(b) and administrative orders or consent
decrees under §120.
Under CERCLA §109(b), failure to comply with the above mentioned provisions can
also result in Class II administrative penalties of not more than $25,000 per day for
each day in which the violation continues. In the case of a second violation, the
penalty can amount to $75,000 per day for each day the violation continues. Under
CERCLA §109(c), EPA may also begin an action in the United States District court to
assess and collect a penalty of not more than $25,000 per day for each day for each
above referenced violation.
Additional penalties are found in several sections of the statute. For specific
information on violations of other provisions in CERCLA, refer directly to the
section in question.
CERCLA AWARDS
Any individual who provides information that leads to the arrest and conviction of
violators subject to criminal penalties may be awarded up to $10,000 (CERCLA
§109(d)). Any individual seeking an award must file a claim not later than 45 days
after a conviction in the prosecution for which the information was provided (57 FR
26142; June 21,1989). Regulations in 40 CFR Part 303 specify who may be eligible to
file a claim for an award, how much may be awarded, and the criteria for payment of
awards.
RCRA VS. CERCLA ENFORCEMENT AUTHORITY
The Resource Conservation and Recovery Act (RCRA) contains provisions for
cleaning up sites contaminated with solid and hazardous waste. In some instances
both RCRA and CERCLA authority apply to a response action. Factors such as the
timeliness of a response, the substances involved, and the availability of other
enforcement authorities to accomplish the objective are used to decide which law
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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18 - Superfund Liability, Enforcement and Settlements
applies. Generally, sites that may be cleaned up under RCRA or certain other laws
will not be put on the NPL. By "deferring" the cleanup authority to another
program (i.e., RCRA) prior to placement on the NPL, EPA can reserve CERCLA
response activity funding for sites that are not eligible to be addressed under other
federal authorities. If a site on the NPL falls under RCRA authority, it usually will
undergo RCRA corrective action before Superfund remedial activity. In some cases,
EPA may delete the site from the NPL. On March 20,1995, EPA published in the
Federal Register a revised policy setting forth circumstances under which a site may
be deleted from the NPL before the cleanup is complete. As long as the site is being,
or will be adequately addressed under RCRA corrective action authority or is subject
to RCRA permitting or an enforcement order, deletion can occur. For historical
information on the interface between RCRA and CERCLA see the memo from Don
Clay to Stephen Wassersug, dated July 11,1990, or see the February 11,1991, Federal
Register listing final NPL sites (56 FR 5598).
FEDERAL FACILITIES
CERCLA enforcement at federal facilities is a complicated issue. Executive branch
agencies may not sue each other, nor may one agency issue an administrative order
to another without providing an opportunity to first settle the dispute. Thus, EPA
strives to work with other federal agencies on CERCLA compliance issues rather
than initiating enforcement actions. The most common tool EPA uses to ensure
federal facility compliance with CERCLA is an interagency agreement. Under §120,
all federal facilities which are on the NPL must be the subject of an interagency
agreement with EPA. These interagency agreements specify milestones and
deadlines for the federal facility to complete remedial activities, such as developing
the proposed plan, and stipulate penalties for missing those deadlines. Through
these agreements, EPA is provided a level of oversight and enforcement to ensure
federal facilities comply with the requirements of CERCLA.
If EPA is given no other choice but to issue an administrative order against another
federal agency, it must be approved by the Attorney General's Office. Citizens,
however, may sue federal facilities under the citizen suit provision in §310 of
CERCLA. Under this provision, citizens may sue a federal agency in federal district
court to enforce deadlines related to the RI/FS, to satisfy terms and conditions
related to the RD/RA, and to enforce any interagency agreement terms. For more
information on federal facility response actions see the Federal Facilities Hazardous
Waste Compliance Manual and Federal Facilities Compliance Strategy.
2.4 SETTLEMENTS
When negotiations are successful, EPA and the PRPs sign a legal document that sets
forth the requirements for cleanup. Settlements are authorized under CERCLA
§122. There are two types of settlement agreements, administrative orders on
consent and judicial consent decrees. Administrative settlements are authorized by
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements -19
CERCLA, initiated by EPA, and do not go through the court system. Judicial
settlements are filed in court by the Department of Justice (DOJ) on behalf of EPA.
The administrative settlement process may move more quickly and thus EPA will
try to exhaust all administrative mechanisms before referring a case to DOJ for
judicial action.
Settlements can be reached at various stages of the remedial process. Usually some
type of agreement is entered into before the Remedial Investigation/Feasibility
Study (RI/FS) or Remedial Design/Remedial Action (RD/RA). A settlement
agreement to conduct an RI/FS is usually in the form of an administrative order on
consent. RD/RA settlements, however, must be in the form of a consent decree and
lodged in court by DOJ. If settlement negotiations fail or no good faith offer is
received, EPA may issue a unilateral administrative order to force liable parties to
conduct the response action, or EPA may use trust fund monies to perform the
cleanup and attempt to recover costs from the PRPs at a later date. Under §106, EPA
has the authority to issue either administrative orders or refer enforcement cases to
DOJ.
The settlement tools available to EPA under CERCLA §122 are used as incentives to
encourage PRPs to settle and avoid being sued for cost recovery. These tools are
discussed below.
MIXED FUNDING
Mixed funding agreements allow EPA to settle with some PRPs at a site while
continuing to pursue non-settling PRPs for cost recovery (§122(b) and 53 FR 8279;
March 14,1988). These settlement tools were not available to EPA until SARA was
enacted in 1986. There are three types of mixed funding settlements:
•	Preauthorization; PRPs agree to conduct the response action and the
Agency agrees to allow a claim against the Fund for a portion of the costs
•	Mixed work; PRPs agree to conduct discrete portions of the response
activities and EPA agrees to conduct the remainder
•	Cashout; PRPs pay for a portion of the response costs up front and EPA
performs the response action.
When evaluating the appropriateness of using a mixed funding settlement, EPA
will first consider the quality of the overall settlement offer. In 1985, EPA published
an Interim CERCLA Settlement Policy (OSWER Directive 9835.0) that outlined ten
criteria to help determine the benefits of a PRP settlement offer amounting to less
than 100 percent of the cost of a cleanup at a site (50 FR 5034; February 5,1985). The
criteria of particular importance for mixed funding settlements include the strength
of the liability case against settlers and any non-settlers, the amount of money
potentially withdrawn from the Fund, and other mitigating and equitable factors.
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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20 - Superfund LiaMIity, Enforcement and Settlements
For a complete description of the Interim CERCLA Settlement Policy as it relates to
mixed funding settlements, consult the March 14, 1988, Federal Register (53 FR
8279).
DE MINIMIS
A de minimis settlement is a final settlement between parties who meet the
requirements of §122(g)(l). These settlements allow parties to pay a discreet or
specific amount of response costs and avoid future legal costs. There are two types
of de minimis settlements available to qualifying PRPs: de minimis waste
contributor settlements and de minimis landowner settlements.
Under §122(g)(l)(A) relating to generators, a PRP who can prove the hazardous
substances they contributed to the site are minimal in amount and toxicity in
comparison to other hazardous substances at the site may qualify for a de minimis
waste contributor settlement. The PRP would only pay for a minor portion of the
response costs. As a subset of de minimis waste contributor settlements, CERCLA
provides the Agency with the authority to enter into settlements with persons who
may have contributed minuscule amounts of hazardous substances at a site. These
settlements, known as de micromis settlements, are helpful in reducing transaction
costs associated with PRPs seeking contribution from non-paying PRPs under
§113(f). A de micromis settlement may be especially appropriate for such entities as
small businesses, associations, nonprofit organizations, or other persons that do not
manufacture large amounts of hazardous substances. The need for de micromis
settlements has arisen largely in municipal/industrial "co-disposal" landfill cases
where generators of chemical or industrial wastes have brought contribution actions
against large numbers of small parties who contributed only trash or other
municipal solid waste. In such cases, the resulting litigation and other transaction
costs can overwhelm the truly small volume parties, and are likely to far exceed the
allocable share of each such party, even if liability can be established. For additional
information on de minimis and de micromis settlements, see OSWER Directives
9834.7-01C and 9834.17.
Along with de minimis and de micromis contributor settlements, under CERCLA
§122(g)(l)(B), qualifying landowners of property on which a Superfund site is located
who, during the term of ownership, did not conduct or permit generation,
transportation, storage, treatment or disposal at the facility may enter into a de
minimis landowner settlement limiting their liability at a site. The requirements
which must be satisfied in order for the Agency to consider a settlement with a
landowner under the de minimis settlement provisions are analogous to the
elements which must be proved in order for a landowner to establish a third-party
defense under §§107(b)(3) and 101(35). De minimis settlements may be entered
either through consent decrees or administrative orders on consent.
As part of the Superfund Reforms, EPA is encouraging the use of de minimis and de
micromis settlements to expedite the settlement process and relieve minor
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements - 21
contributors from liability. To foster these settlements, EPA published the revised
documents entitled Model CERCLA 5122(e)(4) De Minimis Contributor Consent
Decree and Model CERCLA 5122(g)(4) De Minimis Contributor Administrative
Order on Consent (September 19,1995), which are to be used as guidance by EPA and
DOJ staff, when negotiating de minimis contributor settlements. Furthermore, EPA
announced in October 1995, as part of Superfund Reform, that it will double the cut-
off for the de micromis contribution threshold. The goal of EPA's policy is the
contribution limitations, will not be pursued. If necessary, EPA will enter into a
settlement with these parties for no money in order to provide de micromis party
contribution protection from third party suits. For further guidance on de minimis
landowner settlements, see the August 18, 1989, Federal Register (54 FR 34235).
Also, for more information on de micromis settlements, see Guidance on CERCLA
Settlements with De Micromis Waste Contributors (OSWER Directive 9834.17).
COVENANT NOT TO SUE
A covenant not to sue is a release from liability for PRPs who wholly or partially
clean up a site or pay for the cost of cleanup. According to §122(0, EPA may issue
covenants not to sue for CERCLA liability, including future liability, in the
settlement of some CERCLA cases. EPA grants releases from liability based on the
Agency's confidence that the remedy will prove to be effective and reliable. The
covenant not to sue is given in exchange for a PRP's agreement to perform the
response action or to pay for an Agency-lead cleanup, and does not take effect until
PRPs have completed all actions required by the CD or the AOC. Covenants not to
sue include "reopener" provisions allowing EPA to bring administrative or judicial
actions against a PRP where previously unknown conditions or new information
indicate that the remedy is no longer protective of human health or the
environment (CERCLA §122(0 and 53 FR 28041; July 27, 1987).
PROSPECTIVE PURCHASERS
EPA may choose to enter into a covenant not to sue to encourage purchasers to buy
contaminated property for cleanup, redevelopment, or reuse, without fear of future
liability. EPA will consider such agreements with prospective purchasers under
certain conditions. In May 1995, EPA issues guidance which expanded the
circumstances under which the Agency will provide covenants not to sue to
prospective purchasers of contaminated property. EPA will consider such
agreements if they result in either: 1) a substantial direct benefit to the Agency in
terms of cleanup or funds for cleanup or; 2) a lesser direct benefit to the Agency
coupled with a substantial indirect benefit to the community in terms of cleanup,
job creation, or development of property (60 FR 34792; July 3,1995).
ALTERNATIVE DISPUTE RESOLUTION
In 1990, Congress passed the Administrative Dispute Resolution Act that
encouraged all federal agencies to use alternative dispute resolution (ADR)
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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22 - Superfand Liability, Enforcement and Settlements
techniques to aid in the mitigation of federal agency disputes. Mediation, EPA's
most frequently used ADR method, involves the use of a neutral negotiation
facilitator who has no decision-making power. The agreements reached in a
mediation session are nonbinding. Mediation has been discussed with settling
parties in more than 50 enforcement actions and used in 30 (Enforcement Project
Management Handbook. OSWER Directive 9837.2B). Although some believe that
ADR may require additional work and funds, EPA has established a Headquarters
liaison position to coordinate ADR activities agency-wide. EPA has also sponsored
pilot projects testing the success of ADR. For more information with respect to
ADR, refer to the document entitled Final Guidance on the Use of Alternative
Dispute Resolution in Enforcement Actions (OSWER Directive 9834.12) and Use of
Alternative Dispute Resolution in Enforcement Actions, May 1995.
2.5 COST RECOVERY
If settlement negotiations are not successful, EPA will finance and conduct the
response action and subsequently pursue cost recovery from the liable parties. This
section addresses various types of cost recovery actions such as EPA recovering costs
from PRPs for Fund money spent to perform a response action; PRPs seeking
reimbursement for response costs from other PRPs; and private parties recovering
costs for the performance of a response action from the Fund or PRPs.
EPA AND PRP RESPONSES
CERCLA §107(a) authorizes EPA to initiate cost recovery actions for all costs not
inconsistent with the National Contingency Plan (NCP) which are incurred during a
response to an actual or threatened release of a hazardous substance. Cost recovery
can be pursued for the costs of a removal, RI/FS, and RD/RA, including EPA's costs
of overseeing PRP responses and interest. The enforcement actions to recover costs
may include demand letters, negotiations with PRPs, arbitration, alternative dispute
resolution, administrative settlements, judicial settlements, and litigation. In most
cases, PRPs will negotiate with EPA over the extent of liability or the costs incurred.
If the negotiations are successful, EPA can issue an AOC or the court (if the costs of
the response action exceed $500,000) will approve the terms of the settlement for
which the PRP must reimburse EPA for its response costs. If the PRPs refuse to
reimburse EPA for those costs, EPA can refer the case to DOJ to recover costs.
CERCLA §113(g) established a statute of limitations on cost recovery actions; an
action to recover costs must start within three years of completing a removal action
or within six years after starting construction of the remedial action.
CERCLA §§107(1) and (m) authorize the federal government to impose a lien against
a party who is liable under §107(a). This lien may be imposed on the property or
vessel which is subject to a removal or remedial action (further discussion on this
subject can be found in supplemental Guidance on Federal Superfund Liens,
OSWER Directive 9832.12-1 a). The lien arises when the PRP receives written notice
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements - 23
of its potential liability for response costs and continues until the PRP's liability is
fully satisfied or becomes unenforceable because of the statute of limitations
(CERCLA §113(g)).
In addition to EPA initiating cost recovery actions, PRPs can seek to recover money
expended in performing any response action from any other PRPs associated with
the site. These costs must be consistent with the NCP. During or following a civil
action under §§106 or 107(a), any person may seek contribution for response costs
from anyone else who is liable or potentially liable. For example, if EPA has begun
an action to recover funds from Responsible Party A, Party A can demand
reimbursement from Responsible Parties B, C, and D. Responsible Party A can also
sue B, C, and D for cost recovery even if A has not been sued by EPA (see §113(f) and
40 CFR §300.700). A court can allocate the total response cost using appropriate
factors, such as the volume of hazardous substances contributed by each party, if the
parties are unable to come to a settlement.
OTHER PARTY RESPONSES
Section 300.700 of the NCP states that any party may conduct a response action to
reduce a release or a threat of a release. Parties conducting a cleanup may recover
the costs of a response action from the Fund or from the responsible parties using
one of several statutory mechanisms set out in Subpart H of the NCP. Responsible
parties may not recover costs for which they are liable.
Pursuant to CERCLA §107(a), an innocent private party conducting a cleanup may
receive a court award of response costs, plus interest, from the responsible party(s).
In order for the private party to be eligible for reimbursement, the response action
must be considered "consistent with the NCP." This means that the action must be
in substantial compliance with the requirements in 40 CFR §§300.700(c)(5) and (6).
Private parties can use the mechanism provided in CERCLA §111(a)(2) to recover
costs from the Fund for certain activities (40 CFR §300.700(d)). To qualify for
reimbursement, EPA must preauthorize the response activities and the eligible
person must demonstrate the capability to respond safely and effectively to the
release, and establish that the action will be consistent with the NCP.
Preauthorization will only be granted to a PRP subject to a §106 order or, as
mentioned in Section 2.4 of this module, preauthorization can be a settlement
agreement pursuant to §122. For more information on response claims procedures
see the January 21,1993, Federal Register (58 FR 5460).
A party who has complied with a §106(a) enforcement order may seek
reimbursement for response costs incurred when complying under §106(b) (40 CFR
§300.700(e)). Section 106(a) of CERCLA allows EPA to unilaterally order PRPs to
implement site cleanups when a release or threat of a release poses an imminent
and substantial endangerment to human health or the environment. If a PRP
complies with a CERCLA §106(a) order, the PRP may petition EPA under §106(b) for
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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24 - Superfund Liability, Enforcement and Settlements
reimbursement of cleanup costs from the Superfund if they believe they are not
liable for all or part of the costs or if it is found that EPA's response decision was
"arbitrary and capricious." More information on §106(b) reimbursement can be
found in Guidance on Procedures for Submitting CERCLA SI 06(b) Reimbursement
Petitions and on EPA Review of Those Petitions, June 9,1994,
Section 123 of SARA provides for local governments to receive reimbursement for
the costs of temporary emergency measures (such as security fencing or response to
fires and explosions), that are necessary to mitigate injury to human health and the
environment. This reimbursement is limited to $25,000 per response and requests
must be received by EPA within one year of completion of the response. Specific
procedural regulations pertaining to local government reimbursement are set out in
40 CFR Part 310 (58 FR 4816; January 15,1993).
2.6 RELATIONSHIP TO REMEDIAL AND REMOVAL ACTIONS
The enforcement, settlement, and cost recovery activities occur simultaneously with
site cleanup activities. For an enforcement-lead remedial action, EPA's general
sequence of events is to identify PRPs, issue notice letters, and conduct an RI/FS.
The PRPs may conduct the RI/FS under a consent decree or an administrative order
on consent (§122(d)(3)).
When a §106 remedial action is initiated, there are three possible outcomes. The
Agency may receive a "good faith" offer from a PRP, receive no response from a
PRP, or engage in negotiations with a PRP that end unsuccessfully. If EPA receives a
good faith offer to conduct or pay for the response action, the Agency will attempt to
negotiate a settlement. If the response is unfavorable or negotiations are
unsuccessful, a unilateral §106 order may be ordered. If the PRP does not comply
with the order, EPA may refer the case to the Department of Justice to file a civil
suit.
Removal actions, because of their emergency nature and shorter time frame, have a
less complex administrative process than the remedial program, and therefore
enforcement procedures for removals are more straightforward. Removal
enforcement settlements are usually finalized by administrative orders (AOs) rather
than consent decrees which are required for remedial settlements. AOs are less
formal since they are written by EPA and do not require judicial approval. The AO
may be on consent if the PRP willingly agrees to perform the prescribed activities, or
an AO may be a unilateral administrative order (UAO) if the PRP is uncooperative,
forcing EPA to order them to conduct a cleanup.
Although the AO enforcement mechanism may be used to conduct an enforcement-
lead emergency removal action under §106 of CERCLA, the AO is not often used in
these situations. The circumstances are usually better suited to Fund-lead actions
since emergency situations do not allow for the administrative time of such
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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Superfund Liability, Enforcement, and Settlements - 25
enforcement orders. For removal actions, EPA can conduct a cleanup under §104
response authority and use §107 to seek reimbursement if the PRP does not respond
to an order, if the PRP's cleanup efforts are inadequate, or if a PRP cleanup cannot be
conducted quickly enough in an emergency.
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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3. SUMMARY
CERCLA provides EPA a broad set of legal tools to facilitate the process of cleaning
up hazardous waste sites. These tools include a variety of enforcement
mechanisms, such as administrative order authority and judicial enforcement
authority. CERCLA includes strong liability provisions, such as the authority and
the funding to take direct action to clean up sites and pursue cost recovery from
PRPs. Section 104 provides EPA with the authority to conduct a cleanup, issue
information requests to gather evidence of PRP liability, and obtain site access.
Section 106 includes provisions for EPA to unilaterally order PRPs to clean up sites
and issue fines for not complying with orders. The liability provisions of §107
provide EPA with the authority to recover all response costs, determine the amount
of liability, pursue cost recovery, and identify parties associated with a release.
Section 122 authorizes EPA to enter into agreements with PRPs that allow the PRPs
to conduct all or part of the response activities. Combined, these authorities allow
EPA to consistently strive to ensure uncontrolled hazardous waste sites are cleaned
up, and that the parties responsible for the contamination bear the burden of paying
for the response.
The information in this document is not by any means a complete representation of EPA's regulations or policies, but is
an introduction used for Hotline training purposes.

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