Project pathway
The quickest route to the right decision.
Explosive ordnance surveying in Bettembourg
Development of a rear plot may also require work on a shared access road and its utilities. Where ground works are proposed there, establish whether earlier investigations cover these areas too. For your project in Bettembourg, FONTANA-EOD helps assess which areas and depths have already been evaluated and where clarification is still needed. Send the current ground works plans, earlier division of the site and complete investigation reports.
Define the new ground works.
Also mark the ground works.
Compare old and new boundaries.
Assess the construction project
How are the construction area and shared access prepared together?
Show the excavation, proposed utility works and shared access road on a site plan. Distinguish areas used only for vehicles from those involving ground disturbance and add their depths. Existing investigation reports are assigned to these areas. Access rights and planning matters are also clarified with the responsible parties.
Project site
Connect the site with the specific construction task
Identifying the construction plot, access and responsible municipality
Bettembourg is a municipality in the canton of Esch-sur-Alzette in the Grand Duchy of Luxembourg. It also includes Abweiler, Fennange, Huncherange and Noertzange. The precise project address is particularly important for Wolser: the planning records concern areas in Bettembourg and Dudelange. Municipal and investigation boundaries are therefore shown separately on your site plan. For your project, the construction plot and areas required for access and services are brought together using the current plans. The previously published provisions for rear plots help explain this spatial relationship. The planning records applicable today are clarified with the municipality. Explosive ordnance assessment also requires your own investigation reports and the ground works actually proposed. Further locations are listed in the regional overview. State the municipality and land parcel for each connection section and shared access area. This determines the planning documents and contacts required for the specific site.
For the regional context of your construction project, the Bettembourg logistics corridor overview provides further local information.
Local context
The 1944 bombing and today’s construction areas
Access parcels in the Wolser PAP of 2023
The municipality of Bettembourg commemorates the American bombing raid of 11 May 1944. The municipal memorial trail identifies the railway facilities as the target while also describing severe damage in residential areas and at the cemetery. For historical assessment, these local indications are related to the transport and settlement patterns at the time and the present construction site. Reconstruction, later earth movements and existing investigations represent further stages in the site’s history. The position of a current property boundary alone establishes neither the former use nor the spatial scope of an older report.
The written section of the amendment to the ‘ZAE Wolser’ PAP dated 13 January 2023 addresses buildings on rear plots and subdivision of larger properties. For rear parcels, it provides access via a designated access parcel. This is intended to accommodate traffic and the necessary technical infrastructure. Assessment of a construction plot therefore also considers the areas through which it is accessed and supplied with services.
Later plan versions and the actual ground works
In October 2025, the municipality also published an explanatory statement for PAG amendment 08 describing further planning changes for Wolser. The text from 2023 should therefore not be treated as today’s binding requirement without checking. In any case, explosive ordnance assessment depends on the specific ground works: the construction area, access road and utility route must be clearly related to the existing investigation results.
The October 2025 explanatory statement proposes, among other changes for Wolser, alteration of the western access and a slight northward shift of a corridor for non-motorised traffic. Such changes affect spatial preparation of access and connections. Investigation planning therefore compares the current ground works drawing with maps from older investigations. That planning stage describes an intention, not construction already completed.
Requirements
Clarify technical requirements and responsibilities within the project
Relate requirements to the specialist task
For the commissioned work, the applicable technical requirements, permits, competence and responsibilities are clarified. The actual scope of work is what matters. Tasks and interfaces are described for the project and checked against the required authorisations.
Link occupational safety to the construction sequence
The risk assessment, work areas and communication arrangements must suit the planned activities. Specialist explosive ordnance work is coordinated with the other construction activities. Site organisation, traffic safety and other technical assessments retain their own responsible parties. Joint coordination assigns the relevant specialist work and responsibilities to the affected construction sections.
Use technical findings correctly
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 2023 version of the PAP ZAE Wolser addresses access parcels. The explanatory statement for PAG amendment 08 of October 2025 describes later proposed changes. The municipality of Bettembourg’s planning information is used to clarify the associated documents and information for the specific construction task.
The BFR KMR guidelines on clearance planning explain how the task and approach relate; the guidance on geophysics describes survey conditions and the limits of methods. The BFR documentation requirements relate the evidence to the actual scope of services. The Luxembourg Army describes the state’s handling of found ammunition.
The BFR KMR are used as technical guidance; locally applicable requirements and responsibilities must be clarified separately.
For work in Luxembourg, the locally applicable prerequisites for the specific activity are checked before it begins. The Guichet.lu portal explains occasional and temporary service provision in Luxembourg and the posting of employees. The necessary notifications and evidence relate to the type of service and personnel deployment. German technical guidance does not replace these Luxembourg requirements. German permits and certificates of competence under the Explosives Act belong to the German regulatory framework. The permitted scope of activity in Luxembourg is determined by the applicable local prerequisites and required coordination.
Working together
Distinguish the tasks of client, designers and specialist contractor
Client and operator
The client describes the project and provides the available project records. The operator adds requirements for use, access and timing. A coordinating contact brings the parties together; individual tasks remain assigned to the named parties. Before commissioning, it is clearly recorded what information is missing, who will obtain it and what decision the result is intended to prepare.
Planning and construction management
The specialist designers describe areas, depths, construction methods and changes. Site management coordinates the planned sequence with the construction contractors and agreed specialist works. Results are assigned to the respective intervention. A technical plan change is communicated early enough for its effect on the survey task to be assessed before construction. Organisational construction stage boundaries remain distinguishable from technical survey boundaries.
Specialist company and competent bodies
The private explosive ordnance specialist carries out the agreed investigation and documentation. Documents needed for an official procedure are determined by the site, project and requirements of the competent body. The technical report describes the specialist service completed with its documented area, depth and service scope. The respective competent bodies make official decisions.
In Luxembourg, the Service de déminage de l’Armée luxembourgeoise, SEDAL, deals with found ammunition. The army identifies its tasks as identification, assessment, neutralisation and destruction. The police receive urgent danger reports on 113. For the planned specialist investigation, tasks, contacts and necessary prerequisites are agreed before work begins. Site management keeps these contacts available to those involved and refers any find to the responsible state authorities.
Investigation task
Which specialist task comes next?
Relating existing results to the new boundaries
Compare the investigation maps with the current parcel boundaries and proposed ground works. Consider the documented depths and limitations as well as the area. Results that fit can continue to be used. Changed property boundaries establish neither an automatic need for a new investigation nor findings for areas not previously covered; specialist comparison provides the necessary distinction.
Compare the existing investigation scopePreparing additional connections for their survey conditions
Identify known technical installations and possible obstructions along the utility route. Suitable services are selected according to the investigation objective and conditions. If a section is initially inaccessible, its investigation is accounted for in the programme. A result for the neighbouring property cannot resolve that outstanding task merely because it is nearby.
Compare investigation methodsProject types
Considering rear plots together with their access and services
Relating historical indications across today’s parcel boundaries
Provide earlier aerial photograph analyses and other historical assessments together with the maps used at the time. Today’s property division may differ from them. A traceable comparison of plans shows which construction and access areas were covered. Assigning a new parcel number does not in itself extend or reduce an investigation finding; the documented spatial and technical scope remains decisive.
The comparison also includes the legend, capture date and area covered. If a utility is routed outside the former construction plot after subdivision, its alignment is identified as a separate work area. Specialist planners can then distinguish the sections covered by existing findings from those requiring additional investigation. A shared access address does not replace this spatial comparison.
Arrange specialist assessment of historical evidence
Determining investigation needs for access and utility works
An access road may simply be driven on or excavated for new utilities. Describe the work actually proposed and its respective depths. Specialist planners consider existing results, known installations and access limitations. This forms the basis for a suitable service. The general description of a serviced plot is insufficient to establish the technical prerequisites for a new connection.
For excavation, describe chambers, connection pits and the intended working area as well as the route. Show deeper individual points in section drawings. Report paving, known existing utilities and lateral access boundaries to the specialist contractor. The findings achievable can then be agreed for the actual construction task before a narrow line on the site plan is treated as a fully investigated area.
Compare specialist services
Showing shared areas clearly in the reports
The documentation should identify which access sections and utility alignments were investigated. Where there are several users, those responsible receive the complete records needed for their work. A shared access address does not replace this assignment. If areas remain outstanding, identify their location and the task still to be clarified before the affected ground works begin there.
For handover, record which results plan belongs to which report and plan version. If land is passed to another project owner, the associated appendices and limitations remain available. A new commission can build on these and explicitly identify the remaining tasks. Site management then has a reliable basis for sequencing the proposed ground works.
Document findings and their limitationsPreparation
Prepare the scope and commission together
Establish what needs to be known before commissioning the work
First 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 taskCoordinate preparatory work with the investigation
Required 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 programmeAgree a clear scope and schedule
A reliable programme distinguishes tasks already technically resolved from prerequisites still outstanding. If an area will be only partly accessible, account for this when commissioning work. Results handover and assessment also need time in the construction programme. Agree timing and the work required once scope, access, documents, construction conditions and the date a decision is needed are clarified.
Discuss the scope and scheduleTasks at the site
Locating the investigation area after subdivision
01
Comparing old and new parcel numbers
An earlier report may still identify the undivided area. Overlay the investigation boundary at the time on the current site plan and add the parcel references. A new property name or number does not automatically make a result unusable. Without a traceable spatial assignment, however, its usefulness cannot be assessed reliably.
02
Recording the access area as a separate work area
Even if the access road belongs to another parcel, work there may be proposed for the rear plot. Describe whether an existing route will merely be used or physically altered. For new road base layers, drainage or utilities, also identify the respective proposed ground disturbance.
03
Following utilities across several properties
A utility may follow the access road before branching onto the construction plot. Show the full proposed route, including chambers and connection points. The description ‘serviced plot’ does not establish what new work on existing utilities will be needed. This requires information on the existing infrastructure and the specific connection plans.
04
Distinguishing investigation from rights of use
A technical assessment of the ground grants no right of entry or access. Before an investigation, clarify which areas can actually be entered and used. Conversely, an agreed right to use an access road does not establish that its proposed ground works have already been investigated. Both matters require separate coordination.
Project documents
Documents that establish the next step
Showing excavation, access and services in the same plan version
Use comparable plans for the construction area, access and connections. Identify different work versions and unresolved options. Specialist planners can then establish which investigation results apply to which version. An older utility sketch should not silently become the basis of the brief alongside a newer building footprint where this changes the ground areas affected.
Agreeing availability of the shared access separately
State who coordinates access and the time when the area may be used. Known utilities, surfaces and available working areas also matter for technical preparation. The investigation addresses its agreed specialist question; it does not establish rights of use. Both tasks must be addressed in good time so that technically prepared ground works can also proceed organisationally. The survey report links the investigation brief, measurement data, interpretation of findings and results plan. Where clearance work has actually been completed, the clearance record describes the areas, depths and scope of services. The conclusion assigns usable results and outstanding tasks to the next ground works.
Construction sequence
Coordinate investigation and construction sections
Relating the initial enquiry to all proposed ground works
Provide a site plan showing the excavation, access and connections, together with existing reports. State depths, the planned sequence and contacts for shared areas. Explicitly identify undecided options. Technical coordination can then establish the needs currently supported by evidence and identify the information missing before a later binding investigation scope can be agreed.
Passing on changes before work on shared areas
If a connection or excavation edge moves, provide the new plan. Specialist planners compare the change with the documented scope. Site management receives the applicable results before the ground works. Any addition is defined spatially, while sections already covered adequately and remaining unchanged retain their suitable reports.
Method selection
Select methods according to the task and survey conditions
Historical records and aerial photographs
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 survey
Magnetometric 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 methods
Electromagnetic 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 surveyingGround-penetrating radar
Under 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 limitationsDeep-ground and downhole surveys
For 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 interventionsSurvey during construction
If 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 constructionTechnical assessment
Deriving the next step from existing reports
Understanding the earlier overall area
The historical aerial photograph analysis can help assess the earlier conditions independently of today’s parcel boundaries. Existing analyses must be checked for their spatial reference and findings. Current subdivision does not change historical events, but may make comparison with older plans harder. Preparatory work that can be clearly located therefore remains important.
If existing historical information is insufficient, the necessary research, including suitable aerial photographs, is agreed as a separate specialist task. It considers former transport routes and buildings as well as later fill or utility relocations. The information analysed is assessed by source, date and spatial significance. The suspected contamination assessment then explains which indications need further attention for today’s ground works.
Investigating access and excavation appropriately
The surveying must consider the planned work and actual survey conditions. A narrow paved access road with utilities may have different conditions from the open construction area behind it. Whether a method can provide the necessary findings requires specialist clarification. Remaining limitations must be identifiable in the results.
Method selection relates the target objects and ground works depth to ground composition, moisture and metal interference. Magnetometry, electromagnetic methods and ground-penetrating radar measure different physical quantities. Depending on the task, additional deep surveying may be necessary. Borehole clearance relates to the agreed point, depth and specialist work actually completed. Remaining survey and interpretation limitations are identified on the results plan.
Including shared areas in the plans
A clearance plan can coordinate the necessary measures for the construction plot and access road. It accounts for which areas are accessible at each construction stage and which investigations are needed before the respective ground works. Changes to shared areas must be clarified with those involved in good time. A required preliminary investigation is not replaced by later observation of excavation. The technical scope of explosive ordnance recovery is agreed with the responsible bodies for the Luxembourg project.
For excavation supervision, the agreed specialist scope is coordinated with site management, access and the excavation sequence. For area clearance and recovery, the tasks permitted in Luxembourg and coordination with state authorities are clarified beforehand. If a suspicious object is found, affected work is stopped and the police or SEDAL are notified. Investigation, handling of the find and subsequent resumption of work are each assigned their actual scope.
Next steps
Information that helps with a project in Bettembourg
Compile the subdivision plan and construction proposal
Send a site plan showing the new property boundaries and proposed construction work. Add the earlier parcel layout where needed. The relationship between areas matters, not merely a list of numbers. Mark where construction is proposed and where only access or utilities are planned. The initial discussion establishes the project location, next ground works and date by which a decision is needed.
Clarify the current plans with the municipality
The municipality of Bettembourg publishes information on the PAG and PAP and refers to the authoritative complete official plan version. Your project should clearly identify the documents currently being used. An older publicly available plan may help explain the history, but does not answer every question about present permission or construction. The document review also includes existing explosive ordnance results. Where historical information is incomplete, the necessary research, including suitable aerial photograph analysis, is arranged.
Include the complete investigation results
The reports are needed with their site plans, depth information and limitations. If only an extract was provided, request the missing appendices. Also mark known strips not investigated or inaccessible areas. A brief statement in property sales particulars does not replace the necessary technical documentation. On this basis, a suitable method is selected according to the investigation objective, ground conditions and interference. The agreed survey or specialist supervision is carried out, and its results are assessed for scope and limitations.
Keeping the handover clear for later project owners
If the site is subdivided again or transferred, investigation results and associated plans should remain together. Subsequent site management must be able to identify what a finding concerns. If the excavation, route or depth changes, the new ground works must again be compared with the documented scope. The report, maps and, where applicable, clearance record are handed over. These establish the usable results and necessary next specialist steps before subsequent ground works.
Documentation
Private construction preparation and state responsibilities in Luxembourg
Findings and their scope
FONTANA-EOD discusses the technical questions about your proposed ground works in Bettembourg with you. The possible service depends on the available records, project and necessary local coordination. An investigation replaces neither a planning decision nor clarification of who may authorise use of shared areas.
Project responsibilities
The Luxembourg Army describes SEDAL as the responsible state service for tasks involving found ammunition. It instructs people not to touch or transport suspicious objects and to notify SEDAL or the police on 113. A find must therefore be reported immediately rather than waiting until the next project meeting.
Working approach
How FONTANA-EOD works
Document the agreed specialist service clearly
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 taskThe task before the equipment
We 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.
Keep limitations visible
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.
Clarify changes before intervening in the ground
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.
Hand over the report and plan together
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.
Understand the results
Use technical statements for the next decision
Clearly relating old and new property identifiers
Keep earlier site plans with the current cadastral information. Mark which former area corresponds to which present area. This assignment helps use existing reports after subdivision or a change of owner. A mere list of parcel numbers is insufficient if it does not clearly identify the investigated area or the limits of the findings.
Understand investigation reports and their limitationsRecording the scope of a joint commission in writing
Identify whether the brief covers only the construction area or also access and connections. Those involved should be able to understand the commissioned specialist question and results needed. Later additions are defined accordingly. With separate construction contracts, it therefore remains clear who provides the records for a shared work area and which tasks still need coordination.
Understand the service scopeDesign and findings
Documents for the next construction decision
Historical evidence and the current design
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 assessmentSpecialist reports for site management
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
Further technical topics
Further technical information for your project
Determine the specialist service from the planned groundworks
Historical assessment, technical investigation and further work answer different questions. In your enquiry, describe the planned ground works and the investigation results needed to prepare them. Operational conditions for industrial and infrastructure projects are agreed with the specialist planners involved.
Compare servicesCoordinate the project sequence with everyone involved
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 documentationQuestions from planning
Questions about subdivided sites and shared access
Does subdivision invalidate an investigation’s findings?
Not simply because of the subdivision. What matters is whether the result can still be clearly assigned to the affected area and depth and fits the new ground works. The former site plan and current parcel layout should therefore be available together. Agree investigation needs before the proposed ground works. The process combines document review, necessary research and method selection with investigation, assessment and documentation.
Must the access road be included in the enquiry?
Yes, if ground works for the project are proposed there or its investigation is necessary to carry out the work. State which areas will only be driven on and which will be physically altered. This establishes the specific technical clarification needed.
Is it enough to state that the plot is already serviced?
That describes its access and utility provision, not the scope of an explosive ordnance investigation. New connections require the actual utility alignments, working areas and depths. Existing reports must be explicitly checked to establish whether they cover these ground works.
How do I establish the authoritative plan version?
Clarify the current version applicable to your project with the responsible body. The municipality has published further planning documents for Wolser after the plan of 2023. The earlier plan illustrates the spatial relationship between rear plots and access areas; the documents actually applicable are used for the present construction task.
May a suspicious object be removed from the access road?
No. Stop affected work, keep your distance and do not touch or move the object. From a safe distance, notify the Luxembourg police on 113 or SEDAL. Do not move the object even a short distance to keep the road clear.
Is the same method automatically suitable for an access road and open construction area?
No. A narrow paved access road with utilities may have different survey conditions from the open area behind it. Specialist planners assess which method can provide the findings needed for each ground works activity. Remaining limitations must remain traceable in the results.
Which factors determine effort and costs?
The size and depth of the ground works, historical information, access and interference determine the work involved. Method selection, investigation, interpretation and documentation are additional factors, as is any necessary further work on findings. Specialist services are agreed according to the findings actually needed. Usable results from earlier commissions help limit additions to the outstanding areas and depths.
What information do several users of an access road need?
A common plan version, the existing results documentation and a clear assignment of proposed work and contacts.
Project enquiry
Prepare the first technical discussion
Show access and utilities
Show the excavation, access road and connections with their ground works depths. Add the relationship between old and new parcels and the authoritative plan version.
Clarify shared areas
Assign existing reports, access and contacts. Identify known utilities, access routes, construction dates and missing results appendices.
Project process and documents
Project process and documentsMethods and technology
Methods and technology
Have your project assessed
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.
