The cheapest disposal route is not always the technically best solution, because a price that is too low frequently indicates inadequate treatment methods, missing certifications, or disposal that is not appropriate for the site. Anyone who decides exclusively on price when disposing of contaminated soils and mineral waste risks legal consequences, environmental damage, and significant follow-up costs. The following questions and answers help to evaluate disposal offers on a technically sound basis.
What risks arise when choosing an unsuitable disposal route?
An unsuitable disposal route can result in pollutants not being completely destroyed or permanently secured. The consequence is environmental liability risks for the client, regulatory follow-up demands, and in the worst case a renewed remediation obligation. Legal responsibility for proper disposal remains with the waste producer.
Specifically, this means: anyone who hands over contaminated soils to an unlicensed facility, or deposits pollutants at a landfill type that is not suitable for that contamination class, is liable for any resulting damage. The Circular Economy Act stipulates that waste must be disposed of harmlessly and properly. A violation can result in fines, criminal complaints, and civil law claims.
The situation is particularly critical with complex contaminations involving substances such as PAHs, PCBs, or PFAS. These pollutants are persistent and mobilizable. If they are not treated professionally, they can enter groundwater and cause far-reaching environmental damage that costs many times the original disposal costs.
What distinguishes professional disposal from cheap disposal?
Professional disposal ensures that pollutants are demonstrably destroyed, immobilized, or permanently separated from the environment. Purely price-driven disposal, on the other hand, frequently optimizes the transport route or landfilling without sufficiently taking the pollutant characteristics into account. The decisive difference lies in the actual depth of treatment.
Professional disposal generally includes the following elements:
- Thorough waste characterization before selecting the treatment method
- Use of approved procedures that are suitable for the respective pollutants
- Complete documentation and record-keeping in accordance with legal requirements
- Certifications of the disposal facility according to relevant standards and legislation
- Transparent communication about treatment results and residual materials
Cheap offers without these elements may appear attractive in the short term, but frequently contain hidden risks. An apparently inexpensive solution that triggers regulatory follow-up demands ultimately costs more than a measure carried out professionally from the outset. More information on the requirements for reliable quality management shows which standards are relevant in this context.
Which pollutants absolutely require a specialized treatment method?
Pollutants such as PFAS, PCBs, PCDD/PCDF (dioxins and furans), mercury, nitroaromatics, and chlorinated hydrocarbons absolutely require specialized treatment methods. These substances are persistent, toxic, and in many cases cannot be permanently and safely isolated by simple landfilling. Disposal without prior treatment is not legally permissible or technically justifiable for these pollutant classes.
Further pollutants that require special treatment methods include:
- Mineral oil hydrocarbons (MOH) and BTEX (benzene, toluene, ethylbenzene, xylene)
- Polycyclic aromatic hydrocarbons (PAHs), typical at former gasworks sites
- Cyanides from industrial processes
- Phenols and their compounds
- Per- and polyfluoroalkyl substances (PFAS/PFOS)
For these substances, mechanical pre-treatment alone is not sufficient. Thermal, chemical, or biological methods are required that actually destroy or permanently bind the pollutants. The choice of method depends on the pollutant concentration, the soil matrix, and the regulatory requirements.
How does thermal desorption work for contaminated soils?
Thermal desorption is a process in which contaminated soils and mineral waste are heated to temperatures of up to approximately 600 °C under exclusion of oxygen, depending on the material and pollutant load. Organic pollutants are vaporized or thermally destroyed without the soil itself burning. The result is a largely pollutant-free soil material that can subsequently be recycled or landfilled.
The process runs in several steps:
- Mechanical pre-treatment: The delivered soil is screened, crushed, and brought to a suitable grain size.
- Thermal treatment in a rotary kiln: The material passes through a rotating kiln at controlled temperatures. Pollutants are vaporized or destroyed.
- Multi-stage exhaust gas purification: The resulting exhaust gases are cleaned by dedusting, thermal post-combustion, flue gas scrubbing, and activated carbon filters before being released into the atmosphere.
- Quality control of the treated product: The treated material is analytically examined and documented.
Thermal soil treatment is particularly suitable for sites with complex mixed contaminations where other methods reach their limits. The process is approved for a wide range of organic pollutants and offers demonstrable pollutant destruction.
When should you insist on a certified waste disposal specialist company?
You should always insist on a certified waste disposal specialist company (EfB) whenever hazardous waste must be disposed of. For certain types of waste, the Circular Economy Act even legally requires the engagement of an EfB. Certification under § 52 KrWG demonstrates that the company meets the professional, personnel, and organizational requirements.
Specific situations in which a certified EfB is indispensable:
- Disposal of soils with hazardous pollutants such as PFAS, PCBs, or mercury
- Remediation of former industrial and gasworks sites
- Projects subject to regulatory oversight or documentation requirements
- Measures in which the client must document their duty of care to authorities
- Disposal of process residues such as slags, ashes, or sludges with pollutant loads
EfB certification is not a quality feature that can be optionally added. It is a legally established minimum criterion for the disposal of hazardous waste. Anyone who ignores this requirement is acting not only negligently but potentially unlawfully.
How can the total costs of a disposal measure be realistically assessed?
The total costs of a disposal measure can only be realistically assessed if, in addition to the disposal price, transport, analytics, documentation, regulatory requirements, and potential follow-up costs are also taken into account. A low treatment price can quickly be offset by high transport costs or complex record-keeping requirements.
A complete cost assessment should include the following factors:
- Analytics costs: Waste characterization, accompanying documents, and acceptance analytics are mandatory components and must be factored into the price.
- Transport costs: Depending on the location of the treatment facility, transport costs can account for a significant proportion of total costs.
- Treatment costs: These vary considerably depending on the type of pollutant, concentration, and quantity of waste.
- Risk buffer: For unknown or variable pollutant profiles, a buffer should be planned for additional quantities or post-treatment.
- Follow-up costs in the event of improper disposal: Fines, remediation obligations, and liability claims can far exceed the original savings.
Transparent material flow management helps to plan waste quantities, treatment routes, and costs realistically from the outset. Anyone who evaluates disposal measures on the basis of complete information makes better decisions than someone who looks exclusively at the treatment price.
How ARE Deutzen GmbH helps with the professional disposal of contaminated soils
ARE Deutzen GmbH specializes in the treatment of contaminated mineral waste and has been providing reliable solutions for demanding remediation projects for over 30 years. As a certified waste disposal specialist company under § 52 KrWG and operator of a thermal soil treatment plant in western Saxony, ARE Deutzen GmbH takes over the entire process chain from delivery to documentation.
The range of services specifically includes:
- Thermal desorption in a rotary kiln at temperatures of up to approximately 600 °C under exclusion of oxygen, depending on the material and pollutant load, for a broad spectrum of pollutants
- Treatment of soils containing MOH, BTEX, PAHs, PCBs, PFAS/PFOS, mercury, dioxins, cyanides, and other chlorinated compounds
- Mechanical-physical pre-treatment and interim storage
- Complete material flow management including dredged material, construction rubble, and process residues
- Complete record-keeping and documentation in accordance with legal requirements
- Certification to ISO 9001, 14001, 50001 and approval under the Federal Immission Control Act (BImSchG)
If you need to dispose of contaminated soils and are looking for a technically sound, legally secure solution, speak directly with the experts at ARE Deutzen GmbH. Get in touch now and describe your project so that we can determine the appropriate treatment route together.