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An explosive ordnance assessment for your Darmstadt project requires the groundworks plan, existing findings and details of the proposed work. FONTANA-EOD clarifies the investigation scope and site requirements with you. We also agree which documents are still needed before work can begin.
State the groundworks, areas and depths.
Provide the official statement, appendices and current plans.
Agree responsible persons, access and required notifications.
For an explosive ordnance assessment in Darmstadt, the area enquiry, technical commission and details of the proposed work are coordinated. We review the available records and identify requirements still to be met. Changes to participants or work areas are accounted for transparently before the activities concerned.
Explosive ordnance surveying – Darmstadt – DB Energie – G 031320601 TSO Kor RA Darmstadt
Service period: 2025-10
Service areas:Surface surveys: GPR, TDEM and magnetometryMethod used in this project: Ground-penetrating radar

The notice dated 24 March 2026 describes a last-minute change of specialist contractor and difficulties submitting the clearance site notification in time for that project. For your project, participants, work areas and required documents are agreed early. The relevant timing requirements follow from your own commission and the current requirements of the responsible authorities. Darmstadt is an independent city in Hesse. Identify the actual construction area, for example in Innenstadt and Mathildenhöhe, Bessungen, Arheilgen, Kranichstein, Eberstadt, Wixhausen or Martinsviertel. For projects in Griesheim, Weiterstadt, Pfungstadt, Dieburg and Groß-Gerau, the actual project location and its responsible authorities must be established. The project owner and designers show the areas and depths actually affected; an adjacent address or neighbouring investigation report is used within its own scope of conclusions.
The Darmstadt administrative district overview provides further local information to place your project in its regional context.
On the night of 11–12 September 1944, Darmstadt suffered extensive destruction. The city’s history also documents the subsequent clearance of rubble and the establishment of businesses on the former parade ground and surrounding barracks sites. During historical investigation, these recorded wartime effects, uses and ground alterations are brought together spatially with the available files, wartime aerial photographs and current groundworks plan. The city’s history establishes the historical context, rather than providing a conclusion for an individual borehole location. For the actual construction area, existing evaluations and technical reports are checked for their spatial reference, date or revision and outstanding questions. Documented filling, redistribution of soil and later construction are included in this review with their dates and spatial extent.
On 24 March 2026, Darmstadt reported a delay to the extension of the cycle path towards Roßdorf. The notice linked it to a last-minute change of the specialist contractor commissioned and a clearance site notification that could not be submitted in time. This case does not establish a general notice period for other projects.
The explosive ordnance clearance service at Darmstadt Regional Council, responsible throughout Hesse, distinguishes an aerial photograph evaluation request from notification of explosive ordnance clearance work. For notification, it lists, among other requirements, the permit holder’s signature, a site plan, and evidence of the permit and responsible supervisor’s competence. Compile the required information and evidence before the planned start of work.
For the commissioned activities, the relevant technical requirements and questions of permits, competence certification and responsibility are clarified. The actual planned service scope is decisive. A general company designation does not replace checking that the tasks and interfaces are described appropriately for the specific project.
Risk assessment, work areas and communication must suit the proposed activities. Ordnance specialist works are coordinated with the other construction activities. Operational organisation, traffic safety and other specialist technical inspections retain their own responsible parties. Joint coordination brings the information together without equating the different tasks.
A measurement anomaly first requires specialist assessment; its appearance alone does not identify it as explosive ordnance. If an object is genuinely suspected to be ordnance, the prescribed reporting procedures and the measures set by the responsible authorities apply. Investigation reports specify the work completed and its limitations, so that results are not extended to unexamined areas or later design changes.
The city’s cycle path notice dated 24 March 2026 describes a change of contractor at that time and the associated delay to that project. The notification period stated there is tied to this dated example. The explosive ordnance clearance service for Hesse at Darmstadt Regional Council explains the aerial photograph enquiry, official statement for the area and notification of clearance work as different tasks. For notification, it lists, among other documents, a site plan, a copy of the permit and the certificate of competence of the person supervising the work.
The BFR principles of clearance planning support the definition of the investigation objective and services. The BFR guidance on geophysics covers methods and surveying conditions; the BFR guidance on documentation provides guidance on results and site plans. Outside their direct scope of application, they serve as technical guidance. The DGUV guidance on occupational safety in explosive ordnance clearance addresses preparation for the specific activity and professional execution. The General Provisions for Explosive Ordnance Clearance in Hesse describe, among other matters, responsible supervision, information about the start of work and documents recording the results. Required permits and certificates of competence are assigned to the specific commission; responsibility for notification, scheduling and handover of results is clarified before work begins.
The BFR KMR are used as technical guidance; locally applicable requirements and responsibilities must be clarified separately.
Permits, certificates of competence and responsibilities for the specific activity are assessed under the Explosives Act and the First Ordinance to the Explosives Act. The risk assessment under Section 5 of the Occupational Safety and Health Act relates to the activities planned. The DGUV Information 201-027 covers preventive investigation and clearance of conventional explosive ordnance and defines its scope. Its references to DGUV Rule 113-003 concern particular activities involving explosives; they are not applied indiscriminately to every construction-site investigation.
The project owner describes the project and provides existing project documents. The operator adds requirements for use, access and timing. A coordinating contact agrees the tasks assigned to them with those responsible. Before commissioning, the missing information, who obtains it and the decision the result is intended to prepare are recorded clearly.
Technical planning describes areas, depths, construction methods and changes. Site management coordinates the proposed workflow with the contractors and agreed technical work. Results are assigned to the relevant groundworks. A technical design change is passed on early enough for its effect on the investigation task to be assessed before execution. Boundaries between construction stages remain distinguishable from technical investigation limits. Site management accounts for access, existing utilities, necessary protective measures and agreed hold points. Changes or unexpected findings are passed to the designated contacts. In its documentation, the specialist contractor records the spatial and technical scope actually covered, including inaccessible areas and interference.
The private explosive ordnance contractor carries out the agreed investigation and documentation work. Official requirements and decisions are clarified with the responsible authorities. The documents required for a particular procedure depend on the location and project. The technical report describes the specialist work performed; its conclusions are not presented without review as general authorisation for further groundworks or as an official decision. The explosive ordnance clearance service at Darmstadt Regional Council, responsible for all of Hesse, arranges removal and, where necessary, defusing and destruction of explosive ordnance. This state responsibility is considered when planning schedules and notifications. Required notifications and handover of results are coordinated with the relevant parties according to the specific activity and Hesse’s requirements.
The method depends on the information required, the proposed groundworks and actual site conditions. Organisational details of the commission supplement this preparation, but do not replace technical method selection. For the area concerned, suitability, access and investigation limitations are assessed together in a traceable way.
Compare specialist services for the planned groundworksAn additional area or greater depth is compared with the existing findings. This establishes whether the agreed task needs to change. The parties affected are also informed. A notification already prepared or an earlier commission does not automatically describe the expanded scope of the new groundworks.
Compare investigation methods
An initial assessment needs an unambiguous spatial reference and a description of the proposed groundworks. Existing correspondence is attached with its date and appendices. The enquiry provides a basis for further planning, but does not document that a technical investigation has been commissioned or carried out.
Coordinate the sequence and tasks
To prepare the work, the responsible parties and current technical task are brought together. A change of contractor is reflected in the relevant records. Earlier information remains as project history. The work actually agreed and its applicable requirements govern the next activity.
Document findings and their limitations
Coordinate the planned start with available access, required records and responsible parties. Identify outstanding information specifically. A date in the construction programme does not by itself constitute technical confirmation. Execution is prepared according to actual progress and the commission’s requirements.
Coordinate the sequence and tasksFirst establish which decision the commission needs to support. Is the task an initial assessment of existing documents, an investigation of a specific area or examination of an anomaly that has already been assessed? These tasks require different evidence. A general wish for safety does not define an investigation that can be carried out. The enquiry therefore specifies the groundworks, location, depth and available findings. Suitable specialist work and the required reporting are then agreed on that basis.
Define the specialist taskRequired access and survey conditions are clarified before the site visit. This may include keeping areas clear, obtaining service information and coordinating with other trades. The method and site determine which preparations are actually needed. Changes to the surface or additional groundworks are not undertaken unilaterally simply to prepare for a survey. Their sequence is agreed with the specialist designers and responsible parties.
Clarify preparatory work in the programmeA sound workflow distinguishes work already clarified technically from outstanding prerequisites. If an area will be accessible only in part, commissioning must take this into account. Handover and assessment of results also need time in the construction sequence. An enquiry therefore does not imply a blanket commitment on dates or cost. Specific coordination connects the described scope with access, documents, execution conditions and the date by which a decision is needed.
Discuss the scope and scheduleDescribe the work ahead and the areas or depths affected. Labels such as construction project or refurbishment alone do not establish investigation needs. Possible preparatory drilling, new utilities or additional foundations are recorded with their own spatial reference. Show excavations, shoring, foundations and underground car parks with the volumes affected horizontally and vertically. Utility construction and crossings are assigned to the relevant road and network sections on the groundworks plan. The specialist contractor can then check which question an existing investigation already answers and which groundworks require supplementary work.
Provide the official records with their appendices and file reference, if available. Check which plan revision and area they concern. Pass on the complete documents so that conditions and spatial limits remain clear. When commercial, production, storage or research sites are repurposed, retained construction and use plans, records of previous groundworks and complete technical reports are also helpful. The parties compare the spatial information in these documents with the current project. Different plan revisions or missing appendices are recorded as specific questions before an additional investigation is commissioned.
Preparation must establish who commissions the work, who communicates design changes and who organises site access. The responsible technical supervisor and official contacts retain their respective duties. An organisational contact list does not replace required permits or certificates of competence. For road, railway and bridge work, operational conditions, access and accessible investigation areas are agreed with the relevant operators. This also applies to stations, tracks, freight facilities and underpasses. Contacts for utilities and existing structures remain identifiable. Those responsible assign necessary preparatory work and handover dates to the individual sections. Changes in requirements are communicated to the specialist contractor before its deployment.
If the contractor, work scope or proposed sequence changes, the relevant information and records must be checked again. The notifications required in the specific case are clarified with the responsible parties. Before work begins, check whether the technical and organisational requirements have been met. A planned date does not confirm this. After a change of contractor, the work specification, named supervisor, planned work areas and current progress are brought together. Existing results are retained with their appendices. Based on the new commission, the parties clarify which information or notifications need updating and which technical requirements remain unresolved before the activity concerned.
Enquiries, notifications and commissioning records explain how the work was prepared. After execution, the report documents the area actually covered and the results. Both types of record remain identifiable. Site management can then trace which steps had been prepared and which technical conclusions are actually available for further groundworks. The results file brings together the site plan, areas and depths covered, method used, surveying conditions and technical assessment. Restrictions caused by installations, interference or lack of access are assigned to the relevant section. Where clearance work has actually been commissioned, its records form part of this evidence. Designers and site management can then compare the forthcoming groundworks with the documented investigation volume.
Provide the newly involved specialist contractor with current plans, previous findings and outstanding questions. Responsibilities for any necessary updates are agreed. An earlier scheduling agreement does not replace this comparison. The handover also preserves restrictions and appendices that may matter for the new work. Current plan revisions, existing survey and results records, and outstanding tasks are compiled for the handover. The investigation purpose, actual scope completed and decisions still required remain clear. Parties joining the project later also need these complete appendices. New investigation needs are agreed against the changed task and the existing results that remain usable.
Use a current groundworks plan and bring together the correspondence and reports needed for it. The responsible parties check their respective contributions. Outstanding requirements receive a clear task. The proposed start can then be agreed using complete information, without treating an earlier enquiry as confirmation to proceed. For the initial enquiry, state the project address, proposed groundworks with their depth, and the next work step. Mark preparatory drilling, utility diversions or changes to existing foundations. An agreed contact brings together questions about missing plans, unresolved access or differing investigation limits. Further preparation follows these specific tasks.
If the contractor, responsible persons or work area change, the affected part of preparation is reviewed. The necessary records are updated specifically. Existing technical results are retained. Further scheduling follows the updated commission and the requirements actually met for the activity concerned. When agreeing services, the existing information, any research required, preparation, investigation, assessment and documentation are identified separately. Those responsible assign the evidence needed to the relevant groundworks and date. For staged execution, the record states when each area becomes accessible and which results must be available before work there begins.
Historical aerial photograph assessment and other old records help place the basis for suspicion in its spatial context. The available images, their evidential value and the limits of the area considered matter. The absence of an identifiable indication must be distinguished from a technically surveyed ground area. The assessment is considered together with the planned intervention and other available findings. It can support the choice of a survey, but is not a measurement of the present-day subsurface or confirmation for all future works.
Understand aerial photograph assessmentMagnetometric methods detect magnetic anomalies. Whether they can address the specific survey task depends, among other things, on the expected objects, ground conditions, interference and required survey area. Fences, utilities or existing structures may affect interpretation. A measurement signal is therefore not described as ordnance solely because of its strength. Method, interpretation and any further investigation are planned as a connected specialist task.
Understand the scope of magnetometryElectromagnetic investigations can be suitable for particular metallic targets and site conditions. Their suitability must be explained for the task, rather than inferred simply from the availability of equipment. Interfering installations, accessible areas and the findings required must also be considered. Results are documented with their location and survey conditions. The specialist assessment determines whether a supplementary method is needed; this remains a project-specific decision.
Understand electromagnetic surveyingUnder suitable conditions, ground-penetrating radar can provide information about subsurface structures and reflections. Ground conditions, moisture, installations and the particular survey task affect interpretability. An anomaly is not automatically ordnance, and an area with no apparent anomalies is not general evidence for arbitrary depths. The specialist interpretation and its limits are documented with the instruction. A survey for another purpose is not adopted without checking as ordnance evidence.
GPR and limitationsFor deeper groundworks, it may be necessary to establish whether a surface investigation can provide the required findings or another approach is needed. Preparation includes the location, depth, borehole layout and existing services. Creating access for the investigation must also be properly planned by specialists. A general depth figure or standard grid cannot replace that work. Findings remain limited to the areas actually investigated and the method used.
Prepare deep interventionsIf a necessary preliminary investigation cannot be completed, the specialists assess whether a planned approach during construction is suitable. This includes coordinated investigation, interpretation and communication of findings within the intended work sequence. Visual observation of excavated material is not an interchangeable substitute for a necessary survey. Site management needs a clear description of when specialist work will take place, how new findings will be handled and which areas remain unresolved.
Agree the approach during constructionThe Historical aerial photograph analysis and other existing findings help define the technical question for the project. They are related to the planned groundworks. Use them to determine which technical investigation is needed. An equipment list alone does not adequately describe the investigation commission.
A Surface survey requires an assessment of access and site conditions. Existing installations and possible interference may limit interpretation. Identify unresolved requirements when agreeing the work. Schedules and expected results must account for these outstanding points.
The explosive ordnance clearance during construction requires a suitable technical task. A preliminary investigation organised late does not by itself justify using this method. The DGUV highlights the limitations of visual observation alone; professional execution requires more than the presence of an observer.
Provide the groundworks plan, existing findings and outstanding questions. For the initial contact, state the project address, construction phase and forthcoming groundworks. Official statements, historical evaluations and existing investigation reports are reviewed with their appendices for plan revision, areas and depths covered, and outstanding questions about the current task. Incomplete records and differing boundaries are noted for further coordination.
Where information is missing, the necessary historical research or aerial photograph evaluation is carried out for the construction area. Recorded wartime effects, former uses and later ground alterations are located using available files and images. The findings are related to the current groundworks plan and assessed for investigation planning. Existing information that is already sufficient can be reused.
Agree the investigation objective and required services on a technical basis. The specialist contractor assigns the excavation, utilities, borehole locations or other groundworks to the volumes and depths actually affected. The suitable method is determined from the investigation objective, records, access, installations and interference. The service scope, preparation required, responsible parties and handover date are agreed before the work concerned.
Agree responsible persons, documents and required notifications. The specialist team carries out the agreed survey or technically defined supervision using the agreed method. Data and findings are recorded with their spatial reference and actual coverage. Access restrictions, interference or changes are documented and coordinated through the designated contacts. Necessary notifications are assigned to the specific activity.
The recorded data and findings are assessed against the investigation objective, method and local conditions. A survey anomaly is interpreted technically; detecting it alone does not identify explosive ordnance. Progress, interference, unresolved areas and necessary additions are documented in the report with the associated site plans. This determines the next investigation or coordination step for the planned construction task.
Document the work carried out, its spatial extent and further tasks. The handover includes the report and plans showing methods, volumes and depths investigated, results and limitations. Required submission of results to the explosive ordnance clearance service is coordinated with those responsible. Designers and site management compare the forthcoming groundworks with the documented investigation volume. Additions needed for extra areas or changed depths receive technical clarification before execution.
Before work begins, the records define what is to be investigated and which requirements must be met. After execution, the documentation describes what was actually covered and the resulting conclusions. A notification or order confirmation does not establish that an investigation has been carried out.
The General Provisions for Hesse require information about the client, responsible person, start of work and file reference, together with site plans documenting the areas investigated. FONTANA-EOD records the agreed specialist service and its actual scope transparently. Outside their direct scope, supplementary BFR principles provide technical guidance rather than a blanket replacement for local requirements.
We assess the planned groundworks against the available documents and their design revision. Before attending site, we agree with you what needs to be investigated, which areas are accessible and what findings are required. If the design or site conditions change, we check whether the agreed scope remains appropriate. The report states what was actually investigated and the limits of the findings. This allows designers and site management to see which findings they can use and where questions remain.
Discuss the investigation taskWe first establish the investigation objective: which question must it answer? We then select a technically suitable method. The availability of a particular device or experience on a similar neighbouring site is not enough to justify the choice of method on its own.
Inaccessible areas and limited conclusions are identified. They do not disappear into a total area figure. Designers and site management can then decide specifically which areas still need attention and when a suitable survey becomes possible.
A new location, additional depth or different construction method is compared with previous results. A familiar project name does not replace this comparison. Feedback is provided before the affected work so that an outstanding question can be included in the sequence.
The technical conclusion remains connected to its location references and appendices. A brief summary helps orientation but does not replace the documented survey scope. This basis is retained even if site management or contractors change.
Interpret each response according to its actual content. Receipt of an enquiry initially confirms transmission, whereas a technical statement may provide a different conclusion. An investigation report, in turn, documents work carried out. These distinctions remain visible in the project overview so that the next step is prepared on the correct basis.
Understand investigation reports and their limitationsAlongside the preferred date, identify the documents, access and coordination needed beforehand. Assign a responsible person and a traceable status to outstanding points. The overview supports coordination. A date alone can neither fill gaps in the findings nor anticipate the notifications and decisions required.
Understand the service scope
Aerial photograph interpretation is related to the actual groundworks. Its purpose and geographical scope remain distinct from a technical investigation of the ground as it is today.
Understand aerial photograph assessment
The findings, their locations and limitations are handed over together. This makes clear to those carrying out the work which area has been investigated and which task remains outstanding.
Assess investigation reports


Historical assessment, technical investigation and further work answer different questions. The service overview helps distinguish these tasks in an enquiry.
Compare services
Preparation connects the commission, site work and handover of findings. Changes to the project can then be incorporated into technical coordination in good time.
Process and documentationNo. Darmstadt Regional Council describes aerial photograph evaluation and notification of explosive ordnance clearance as different procedures. The enquiry serves to obtain the official statement for the area. Notification of the planned work requires its own information and evidence.
It lists a site plan, a copy of the permit under Section 7 of the Explosives Act and a copy of the certificate of competence of the supervisor on site. According to the published guidance, the permit holder must sign the notification. The current requirements for the specific commission remain decisive.
No. The city’s notice describes preparation of a particular project at a particular time. For another project, required information, notifications and timing requirements must be clarified separately. The scheduling situation described there cannot be transferred indiscriminately to other commissions.
After the change, check the information about the commission, responsibilities and proposed execution. Pass on the relevant records in full and agree necessary updates with the responsible authorities. The start of work is agreed against the requirements of the new commission; an earlier proposed date is not a commitment for it.
Stop the work concerned and keep your distance. Do not touch, move or further expose the object. Notify the police immediately on 110 and follow the authorities’ instructions. Never take a suspicious object to a police station or other official premises yourself.
The work and cost depend on the investigation objective, area or number of points, proposed depths, available records and actual surveying conditions. Access, necessary preparatory work, staged execution and documentation affect the service scope. To agree the work, provide the current plan revision and the conclusion needed. Official procedures and commissioned private specialist services are considered with their respective tasks.
The new area is shown on the current plan and technically compared with the commission. The relevant records and information are coordinated accordingly.
Alongside the preferred start, the current technical task, available access, complete records, responsible participants and outstanding requirements are needed.
Send the groundworks plan, existing official statements with appendices and a description of the next groundworks. Identify project contacts, access requirements and the preferred sequence. FONTANA-EOD agrees the investigation required and its preparation with you. Name the specialist bodies already involved and the conclusion needed for the next groundworks.
Also state which earthworks should begin first and which areas are not yet accessible. Necessary preparatory work and handover of results can then be coordinated in good time. Identify changed responsibilities, dates or work areas with the current plan revision. Add existing utility and site plans, known conditions and any appendices still missing.
Whether historical aerial photograph analysis, explosive ordnance surveying, surface surveying using GPR, magnetometry or TDEM, deep-ground surveys, downhole surveys, excavation supervision, area clearance or ordnance recovery is needed depends on the location, ground disturbance, depth, ground and existing documents. An early ordnance assessment provides clarity for tendering, programming, occupational safety and construction.
FONTANA-EOD combines its Section 7 SprengG licence, specialists holding Section 20 SprengG certificates of competence, suitable survey and clearance methods, and traceable documentation. Send the site plan, depth of ground disturbance, construction phase and existing documents for an initial technical assessment.