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Initial status report (AZB) for a gas-fired power plant in Hesse
As part of the approval process for a planned combined heat and power plant in Hesse, a Initial status report (AZB) is prepared. This report is a central component of the immission control authorisation procedure and serves to systematically document the condition of Soil and groundwater prior to the construction or significant modification of an installation.
The MuP Umwelttechnik GmbH - member of the SIERA Alliance, based in Heidelberg provides expert and practical support for such processes. The aim is to identify environmental risks at an early stage, reliably fulfil legal requirements and ensure long-term precautions for people and the environment - all in the spirit of Engineering For a Better Tomorrow.
What is an initial status report (AZB)?
The initial status report documents the Current status of soil and groundwater on a plant site before the start of plant operation. It thus forms the technical and legal basis to:
- to be able to clearly detect subsequent changes or contamination
- Systematically monitor environmental pollution
- to enable proper repatriation in the event of plant decommissioning
The obligation to prepare an AZB arises in particular from the Federal Immission Control Act (BImSchG) and the Industrial Emissions Directive (IED Directive). Both sets of regulations pursue the goal of protecting environmental media in the long term and making operators permanently responsible.
Legal significance of the AZB in the authorisation process
A central element of the baseline report is its Preservation of evidence function. According to § Section 5 (4) BImSchG After a plant has been decommissioned, there is an obligation to restore the soil and groundwater to their original state, if there is significant soiling.
The AZB serves as a binding reference status. This means for system operators:
- Clear distinction between contaminated sites and operational discharges
- Increased legal certainty vis-à-vis authorisation and supervisory authorities
- Transparent and traceable documentation over the entire system life cycle
Focus on relevant hazardous substances (rgS)
As part of the AZB creation process, so-called relevant hazardous substances (rgS) identified. These can arise from operating materials used in the future and potentially enter the soil or groundwater.
Possible causes of contamination include
- Technical defects or leaks
- Accidents during plant operation
- improper storage or handling
The early identification and assessment of these substances is crucial in order to find suitable Precautionary measures and to avoid environmental pollution in the long term.
The three phases of AZB creation
The preparation of an initial status report is structured and is divided into Three successive phases.
1st phase: Concept for the initial status report
In the first phase, a AZB concept developed. This includes:
- the requirements test
- the identification of relevant hazardous substances
- the assessment of the substance risk
- the development of an investigation concept
The aim is to determine the type and scope of the necessary investigations in a technically sound manner.
2nd phase: Site investigations of soil and groundwater
On the basis of the concept, the Site investigations. These include:
- Soil analyses
- Groundwater analyses
- Sampling and laboratory analyses
The results are systematically documented and published in the Initial status report merged. The report is an essential part of the licence application and represents the reference state before the system is commissioned.
3rd phase: Monitoring during the operating phase
During the operating phase Regular monitoring of the soil and groundwater status through recurring status analyses.
This continuous control enables:
- Early identification of changes
- Timely countermeasures in the event of anomalies
- long-term protection of the environment and resources
Importance of the AZB for system operators
A professionally prepared initial status report offers numerous advantages:
- Legal protection over the entire life cycle of the system
- Transparent communication with authorities
- Structured environmental precautions
- Reliable basis for the obligation to return in the event of decommissioning
Orientation towards recognised guidelines
The preparation of the baseline report is based, among other things, on the
LABO working aid for the preparation of initial status reports.
This ensures that the methodology, assessment and documentation are standardised, comprehensible and legally compliant throughout Germany.
Conclusion
The baseline report is a key instrument of preventive environmental protection. It creates transparency, legal certainty and a reliable basis for the sustainable operation of facilities subject to authorisation.
For energy generation plants in particular, the AZB enables clear documentation of the environmental status - from planning through operation to decommissioning.
Are you planning an installation that requires authorisation or do you need support in preparing an initial status report?
The MuP Umwelttechnik GmbH - Member of the SIERA Alliance, supports you with technical expertise, practical solutions and a clear view of the environment and the law.
👉 Contact us for personalised advice.
