How can I contact support?
For direct support, you can reach us via email at support@lardenm.com or by phone at +31 900 397047. Our office is located at Simsekweg 1054.
What is your support's average response time?
We aim to respond to emails within 1 business day. For urgent questions regarding ongoing AERIUS calculations, you can call during office hours (09:00 - 17:00).
Do you also offer online chat support?
Yes, for quick questions you can use our live chat on the website (available during office hours). You can also send a message via WhatsApp to the same phone number.
Where can I find the frequently asked questions (FAQ)?
An extensive list of frequently asked questions about nitrogen deposition, the AERIUS calculator, and permits can be found on our support page.
Can you help with an urgent request for a calculation?
For urgent cases, we ask you to call directly. We assess the urgency and, where possible, can implement an expedited process for your project near Natura 2000 areas.

Our Expertise

Advice & Recommendations

A first, quick calculation of nitrogen deposition for your plan or project. Ideal for feasibility studies and early verification of permit requirements near Natura 2000 areas.

For initial checks Request screening

Complete process from deposition calculation to ecological substantiation for your environmental permit. Includes AERIUS calculations, reporting, and advice on mitigating measures.

For permit application Start process

Detailed analysis of the effects of nitrogen deposition on acidification-sensitive habitats and species. Essential for projects with significant ecological impact or in vulnerable areas.

For complex projects More information

Periodic recalculation and evaluation of nitrogen deposition after project realization. Ensures compliance with permit conditions and timely detection of any exceedances.

For guarantee Plan monitoring

Frequently Asked Questions & Important Clarifications

Below you will find answers to frequently asked questions and essential explanations about our working method, the AERIUS calculator, and the legal context of nitrogen deposition calculations.

Nitrogen deposition is the precipitation of nitrogen compounds (ammonia and nitrogen oxides) onto soil and vegetation. An excess of nitrogen leads to eutrophication and acidification of vulnerable nature areas (Natura 2000). This threatens biodiversity and the conservation objectives of these areas, making projects in the vicinity subject to permit requirements under the Nature Conservation Act.
AERIUS is the official calculation tool of the RIVM for determining nitrogen deposition. We perform detailed calculations using the most current version, specifically tailored to your infrastructure project. Our reports provide insight into the deposition on sensitive habitats and are legally sound for the permit application.
Our expertise is crucial for infrastructure projects such as road expansions, construction activities, industrial developments, and livestock farming expansions that lie within the sphere of influence of a Natura 2000 area. We focus on ecological impact analysis, not on aesthetic garden or landscape design.
An effect is 'significant' if the nitrogen deposition from the project, alone or in combination with other projects, jeopardizes the conservation objectives of the Natura 2000 area. Our calculations and ecological assessment make this distinction clear, which is decisive for the required level of substantiation and possible mitigating measures.
The validity is highly dependent on changes in legislation, calculation rules (AERIUS updates), and the specific circumstances of the project area. Generally, we advise that a calculation should not be older than one year at the time of submitting the permit application. We closely monitor developments.
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