Soil Contamination and Contaminated Sites under Section 324a StGB

By Dr. Julius Hagen, Attorney at Law

Soil contamination starts with causation

In soil-contamination cases, decades may separate the first release of a substance from the investigation. New measurements are taken at a former industrial site, and the current owner or operator is asked to explain when the contamination occurred and who caused it. Section 324a StGB does not criminalise every problematic soil condition. Criminal liability requires a qualifying release or introduction of a substance in breach of an administrative duty and an adverse change in the soil caused by that conduct.

The investigation must look back through the site’s history. Present contamination may originate in an earlier operating phase, for example from a leak or deposit. Criminal attribution requires a reliable connection between the substance found, a specific release and the person said to be responsible.

How soil and contaminated sites are classified

The criminal-law concept of soil is linked to the functions of the upper layer of the earth’s crust. It includes in particular the habitat function, the soil’s role in natural cycles, and its filtering, buffering and substance-conversion function for groundwater protection. Section 2 BBodSchG distinguishes harmful soil changes and contaminated sites. A contaminated site may result from former deposits or a former industrial location; the label does not identify the person criminally responsible.

Groundwater and the bed of a body of water are outside this soil boundary. If the allegation concerns water pollution, Section 324 StGB must be examined separately. In a soil case, the issue is whether the substance-related conduct affected protected soil functions to the extent required by Section 324a.

The Section 324a StGB threshold

Section 324a(1) StGB provides two alternative routes. The soil change must either be capable of harming health, animals, plants, a body of water or property of significant value. Alternatively, the soil must be contaminated or otherwise adversely changed to a significant extent. Both routes require a concrete technical basis; an abstract concern is not enough.

The assessment and action values used in soil-protection law assist the technical analysis but do not replace the criminal-law test. Exceeding a value may indicate a need for investigation or action. It does not by itself establish the relevant release, personal responsibility or intent.

Timing and historical operations

Former industrial sites often combine several operating phases and technical standards. A tank leak, defective pipe or earlier production process may predate the current company’s acquisition by many years. The use of the site, the condition of the installations, earlier inspections and the permit position applicable at the time must therefore be assembled into a timeline.

Excavation, sealing or erosion is not automatically an introduction of substances within Section 324a. Where contaminated material is deliberately moved into another soil area or released through a specific act, that event requires a separate analysis. The decisive issue is what happened to the material, not merely whether the work was described as construction or remediation.

Soil-protection law may require a later owner or operator to investigate, contain or remediate the site. That public-law responsibility does not by itself prove that the person caused the original release or is criminally responsible for an omission. Each person’s knowledge and concrete duty to act must be assessed at the relevant time.

Pollutant pathways, measurements and proof

A measurement initially establishes that a substance was found at a particular location and depth. Criminal attribution requires that finding to be placed within the site history and the spatial pattern of migration. Sampling and soil structure may be as important as possible competing sources.

Where expert reports conflict, the entire chain of proof must be examined. The sample’s integrity and documentation, laboratory method, background concentration and the model of pollutant migration may be decisive. This is especially important where investigators infer a historic operating event from a present-day measurement.

Administrative duties and criminal liability

Section 324a StGB is dependent on administrative law. The soil change must have occurred in breach of an administrative duty. Depending on the case, that duty may arise from soil-protection law, a permit or a permit condition, or another directly applicable rule that protects the soil. The relevant duty must be identified from the historic decision, the operating method and the event that actually occurred.

Intent must cover the relevant factual circumstances and the breach of duty. A different technical understanding, an unclear historic permit or an avoidable mistake may therefore produce different legal consequences. Section 324a(3) also covers negligence; the analysis then turns to the concrete standard of care and how it was breached.

Contaminated sites, remediation duties and attribution

Soil-protection law may impose investigation and remediation duties on the polluter, a successor, the owner or the actual possessor. Former owners may also be involved in specific circumstances. Authorities may require monitoring, measurements and records. Such a duty does not by itself establish that the person caused the original release.

A later phase may become criminally relevant where, after reliable knowledge, a person had a concrete duty to prevent further migration and the omission can be attributed to that person. This must be distinguished from status-based public-law responsibility. If groundwater is threatened, a separate assessment under water-pollution provisions may also be required.

After an official investigation or search

After an official investigation, sampling exercise or search, document the factual course. This includes the area examined, the documents reviewed or taken, the people questioned and the period to which each item relates. It should also be recorded which conclusions the authority draws from that material. Internal reconstruction and any external statement should keep these levels separate. Remediation should be coordinated technically and legally; changing the evidence too quickly can make the causes more difficult to establish.

In contaminated-site cases, the history of the site often determines whether a present finding can be attributed as a criminal event. Facility operation, water pollution and general corporate responsibility are addressed on separate specialist pages.

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