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Must One Also Be Responsible for Waste Located Outside the Business Site? | A Supreme Court Judgment Addressing the Scope of Liability of an Auction Purchaser

In a case raising the question of whether the public-law obligations concerning waste generated at a business site are succeeded to when that site of a business-site waste discharger is acquired through an auction, the Supreme Court held that waste left outside the business site is also, in principle, included within the scope of succession.

However, the Supreme Court held that liability cannot be imposed uniformly even in cases where the purchaser did not know of the existence of the external waste and had justifiable grounds for not knowing.

The lower court held that, once a business site has been acquired through an auction, the obligation to treat waste located outside the business site is likewise wholly succeeded to. The Supreme Court, however, found that examination of the purchaser's ability to recognize the waste and of the principle of self-responsibility was necessary, and it reversed and remanded the lower judgment. (Supreme Court, Decision of January 15, 2026, 2023 Du 62830)

CONTENTS
  • 1. Overview of the Case Concerning the Auction Acquisition of a Business Site
    • - Circumstances of the Waste Generation and Illegal Landfilling
    • - The Process of Acquiring the Business Site Through Auction
    • - The Core Issues of the Case
  • 2. The Standard for Succession to Waste Liability as Determined by the Supreme Court
    • - The Meaning of Business-Site Waste Under the Wastes Control Act
    • - Whether Waste Outside the Business Site Is Also Subject to Succession
    • - The Principle of Self-Responsibility and the Doctrine of Limiting Liability
    • - Exceptional Grounds on Which a Limitation of Liability May Be Recognized
  • 3. The Judgment and Its Legal Effect
    • - A Key Summary of the Judgment
  • 4. Matters Requiring Verification in Practice
    • - Matters to Verify
  • 5. Business-Site Acquisition and Responding to Environmental Disputes
    • - Cases in Which Legal Review Is Necessary
    • - Assistance from Daeryun Law Firm LLP

1. Overview of the Case Concerning the Auction Acquisition of a Business Site

Analysis of a Precedent on the Liability of a Company That Acquired a Waste Treatment Business Site Through Auction

This case raised the question of whether a company that acquired a waste treatment business site through an auction also bears the prior operator's obligation to treat the waste.

In particular, because the waste in question had been left not inside the business site but at an external landfill, the central issue was the extent to which the liability of the business-site purchaser could be recognized.

Circumstances of the Waste Generation and Illegal Landfilling

The prior operator was a company that ran a waste treatment business at a site located in Jangseong-gun, Jeollanam-do.

During its processes, the site discharged slag, a designated waste, and it entrusted the treatment of the waste to an outside contractor.

However, the entrusted contractor mixed the entrusted waste with soil and landfilled it at an abandoned quarry located in Iksan, after which leachate flowed into a nearby stream, giving rise to an environmental pollution problem.

The Environmental Office issued a waste treatment order to the prior operator, but the order was not complied with.

The Process of Acquiring the Business Site Through Auction

Subsequently, the plaintiff company acquired the land, factory buildings, machinery, and equipment of the prior business site through an auction to enforce a security right.

The problem arose when the Environmental Office, taking the view with respect to the plaintiff that "by acquiring the business site, it had also succeeded to the prior operator's waste-related obligations," issued an order to treat the waste and leachate left at the external landfill.

The Core Issues of the Case

In this case, the following matters were the central issues.

Issue 1. Whether waste left outside the business site is also subject to succession

Issue 2. The extent to which public-law obligations are succeeded to by a person who acquires a business site through an auction

Issue 3. Whether the purchaser bears liability even when it did not know of the existence of the external waste

In particular, how the scope of the business-site purchaser's liability could be limited from the perspectives of the principle of self-responsibility and the protection of property rights was treated as an important issue.

2. The Standard for Succession to Waste Liability as Determined by the Supreme Court

The Supreme Court interpreted the scope of succession to liability by considering together the legislative purpose of the Wastes Control Act and the structure of the business-site acquisition.

The Meaning of Business-Site Waste Under the Wastes Control Act

Article 17 (7) of the Wastes Control Act(as it stood before amendment by Act No. 10389 of July 23, 2010)

(9) A person who acquires all or part of the business site of a business-site waste discharger pursuant to an auction under the "Civil Execution Act," a realization (conversion into money) under the "Debtor Rehabilitation and Bankruptcy Act," the sale of attached property under the "National Tax Collection Act," the "Customs Act," or the "Local Tax Collection Act," or any other procedure equivalent thereto shall succeed to the rights and obligations related to that business-site waste.

The Wastes Control Act defines waste generated at a business site as "business-site waste," and it designates the operator who discharged such waste as the "business-site waste discharger."

In addition, the former Article 17 (7) of the Wastes Control Act at issue in this case was a provision intended to recognize the succession of rights and obligations related to business-site waste by a person who acquires a business site through a procedure such as an auction, and the Supreme Court found that the purpose of this provision lies in preventing the generation of abandoned waste and in protecting the environment.

Whether Waste Outside the Business Site Is Also Subject to Succession

The Supreme Court held that, if the waste is "waste generated at that business site," it is, in principle, included within the scope of succession even when it has been left at an external location.

In other words, the purport is that, rather than the current location of the waste, the business site at which the waste was generated is the important criterion.

Accordingly, the Court held that the succession to liability is not necessarily excluded merely because the waste exists outside the business site.

The Principle of Self-Responsibility and the Doctrine of Limiting Liability

However, the Supreme Court held that liability for waste located outside the business site cannot be recognized without limitation.

Referring to the constitutional principle of self-responsibility, the Supreme Court pointed out that imposing unlimited liability extending even to areas that one cannot oneself decide upon or control needs to be restricted.

In particular, it was considered that, in the case of external waste, its existence may be difficult to ascertain during the auction process, the purchaser often does not directly control or manage it, and there are cases in which the scale of the treatment costs is difficult to predict.

Exceptional Grounds on Which a Limitation of Liability May Be Recognized

However, the Supreme Court held that, where the following circumstances are recognized, the succession to liability may be limited.

▶ Where the purchaser did not know of the existence of the external waste

▶ Where there are justifiable grounds for not knowing

▶ Where a situation existed in which verification was realistically difficult during the auction process

In other words, the liability of a business-site purchaser is not recognized uniformly but must be determined by considering together the ability to recognize the waste at the time of acquisition and the specific circumstances.

3. The Judgment and Its Legal Effect

The Supreme Court held that, where a business site is acquired through an auction, the public-law obligations concerning waste generated at the business site may, in principle, be succeeded to.

However, the Court held that, with respect even to waste left outside the business site, liability cannot be recognized uniformly, and that where the purchaser did not know of the existence of such waste and had justifiable grounds for not knowing, the succession to liability may be limited.


In particular, the Supreme Court held that unconditionally recognizing liability for waste located outside the business site may conflict with the principle of self-responsibility and the principle of protecting property rights.

A Key Summary of the Judgment

Category

Content of the Determination

Waste Inside the Business Site

Succession to liability recognized in principle

Waste Outside the Business Site

Included within the scope of succession in principle

Possibility of Limiting Liability

May be recognized exceptionally

Criteria for Determining the Limitation

The purchaser's ability to recognize the waste and justifiable grounds

The Lower Judgment

Reversed and remanded on the ground of insufficient examination

Principal Legal Doctrine

The principle of self-responsibility and the protection of property rights

This judgment is a case that made clear that the scope of a business-site purchaser's liability cannot be interpreted uniformly and that the location of the waste and the purchaser's ability to recognize it, among other factors, must be considered together.

It is also significant in practice in that it set out the standard that liability for waste located outside the business site must be determined by comprehensively examining the characteristics of the auction process and the purchaser's ability to exercise control, among other factors.

4. Matters Requiring Verification in Practice

This judgment is a case that concretely shows how the structure of waste-related liability is succeeded to in the course of acquiring a business site through an auction.

In particular, given that even waste left outside the business site may, in principle, be subject to succession to liability, the need to review environmental risks at the stage before acquiring a business site may become an issue.

In addition, given that the possibility of limiting liability may be recognized where the purchaser did not know of the existence of the external waste and had justifiable grounds for not knowing, the scope of investigation and the ability to recognize the waste at the time of acquisition likewise become important factors in the determination.

In actual business-site acquisition and auction procedures, verification of the following matters may be necessary.

Matters to Verify

Matters Requiring Verification

The treatment and entrustment history of the waste generated at the business site

Whether there is a possibility of external landfilling or illegal treatment

Whether the history of the Environmental Office's treatment orders and administrative dispositions has been verified

Whether any waste-related civil, criminal, or administrative dispute is ongoing

Review of the ability to recognize the existence of waste outside the business site

The scope and content of the environmental due diligence conducted during the acquisition

Where an auction or business-site acquisition is carried out without verifying the operating history of the business site or the circumstances of waste treatment, unexpected environmental liability issues may arise.

5. Business-Site Acquisition and Responding to Environmental Disputes

The obligation to treat business-site waste and environmental liability are not matters that exist independently of each other; rather, they are determined in a state in which the operating history of the business site, the circumstances of waste generation, the structure of entrusted treatment, and whether an administrative disposition has been issued, among other factors, are combined.

In particular, in the course of acquiring a business site through an auction or otherwise, not only the assets themselves but also the prior operator's public-law obligations related to waste may become an issue, so there is a question of whether waste exists outside the business site and of the possibility of succession to liability.

In addition, succession to liability under the Wastes Control Act may not treat waste inside the business site and waste outside it identically, and the purchaser's ability to recognize and control the waste may likewise become an issue.

Cases in Which Legal Review Is Necessary

  • Where a business-site auction or corporate acquisition is being carried out
  • Where a business site related to a waste treatment or recycling business is being acquired
  • Where the existence of waste outside the business site is at issue
  • Where a treatment order or administrative disposition has been received from the Environmental Office
  • Where a dispute has arisen in the course of entrusting waste treatment to a contractor
  • Where environmental pollution and treatment-cost issues have arisen after acquiring the business site

Assistance from Daeryun Law Firm LLP

Real estate attorneys, in collaboration with administrative attorneys and corporate attorneys, provide legal review of the following matters.

• Review of whether liability is succeeded to under the Wastes Control Act in the course of acquiring a business site

• Analysis of the ability to recognize, and the scope of liability for, waste located outside the business site

• Review of the direction for responding to the Environmental Office's treatment orders and administrative dispositions

• Review of the structure of entrusted waste treatment and of environmental risks

• Analysis of environmental liability that may arise in auction and rehabilitation proceedings

If you need a review of the relevant law, you are welcome to review your response strategy through a consultation with a 🔗real estate attorney who can examine the operating history of the business site together with the structure of environmental liability.

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