Schematic regional map marking Düsseldorf, beside a tablet, hard hat and notebook.

Explosive ordnance assessment in the Düsseldorf administrative district

An aerial photograph analysis, an older site plan and individual investigation reports exist for a property. Which of these answers the question raised by the groundworks now proposed? FONTANA-EOD helps projects in the Düsseldorf administrative district bring these documents together and identify outstanding points before intervention.

Text and map

Use the complete assessment.

Existing assets

Read earlier results according to their scope.

New works

Compare the current location and depth with them.

Discuss the project's technical requirementsExplosive ordnance assessment in North Rhine-Westphalia
Assess the construction project

Assess text, maps and limits of findings together

For projects in the Düsseldorf administrative district, result text, maps and appendices are read together. We compare the documented scope with the proposed groundworks. Recommendations, investigations already carried out and remaining survey limitations are classified separately and brought together traceably for further coordination.

Documented location references

Reference projects in the Düsseldorf administrative district

Select a project location on the map or in the location list. The associated entries lead to the protected reference overview.

30 locations · 135 associated reference entries

Reference projects in the Düsseldorf administrative districtGeographical outline with confirmed location references from the project records. No precise ordnance find or site coordinates. Neuss – 6 reference entriesDüsseldorf – 44 reference entriesNettetal – 8 reference entriesMönchengladbach – 8 reference entriesWuppertal – 10 reference entriesDuisburg – 15 reference entriesKrefeld – 3 reference entriesGeldern – 4 reference entriesHaan – 5 reference entriesViersen – 2 reference entriesDinslaken – 1 reference entryRatingen – 1 reference entryHilden – 1 reference entryWesel – 2 reference entriesMülheim an der Ruhr – 1 reference entryMoers – 1 reference entryEssen – 4 reference entriesOberhausen – 3 reference entriesKaldenkirchen – 5 reference entriesUnterrath – 2 reference entriesBienen – 2 reference entriesNieukerk – 3 reference entriesGruiten – 1 reference entryNievenheim – 1 reference entryNeukirchen-Vluyn – 1 reference entryRheinberg – 1 reference entryWillich – 2 reference entriesMettmann – 3 reference entriesHamminkeln – 1 reference entryXanten – 1 reference entry

The points indicate place references of documented projects, not precise ordnance find or construction site coordinates. Several entries may belong to one project. References without a reliable place assignment are available in the complete reference overview.

Map bases: © BKG (2026), VG250 / GN250, Data licence Germany – attribution 2.0. Area outline projected for display. Selection and project assignment: FONTANA-EOD.

Project references

Selected project examples

Project site

Connect the site with the specific construction task

Schematic map with a coat of arms, alongside a tablet, safety helmet and notebook.

Distinguish the responsible service from the local office

The explosive ordnance disposal service of the Düsseldorf district government serves the Düsseldorf and Cologne administrative districts. The local contact is checked for the respective project. The current FAQ identifies the fire service for Düsseldorf and Krefeld and, as a rule, the local regulatory authority elsewhere. Complete responses and the specific proposed interventions form the basis of further specialist coordination. The Düsseldorf administrative district comprises five districts and ten independent cities. An enquiry clearly identifies the property, municipality and subarea concerned. Where there are several project locations, local procedures remain distinguishable with their respective plans and responses.

Information on explosive ordnance surveying in Wuppertal, Mönchengladbach, Krefeld, Oberhausen, Mülheim an der Ruhr, Solingen, Neuss, Moers, Ratingen, Velbert, Viersen, Grevenbroich, Dinslaken, Dormagen, Wesel and Langenfeld helps you prepare your project enquiry. The documents and proposed ground interventions on the particular property are decisive.

North Rhine-Westphalia
Local context

What an existing assessment actually establishes

Read the complete response

In its aerial photograph analysis FAQ, the Düsseldorf district government explains that the explosive ordnance disposal service's assessment comprises text and maps. Both belong together. The presentation may include different indications and earlier work. A single map colour or cropped plan therefore does not replace the complete document. The FAQ distinguishes specific indications of individual suspected objects from area-related signs of earlier fighting. Maps may also show earlier checks. These different contents are recorded in the project overview with their respective meanings. A recommended check is only assigned as completed when the corresponding result report is actually available. The new construction task is compared with this complete status.

The North Rhine-Westphalia Ministry of the Interior identifies ground fighting from autumn 1944 until the end of the war in the Lower Rhine region as part of the historical context of today's explosive ordnance issues. For a specific project, such regional indications are linked to area-specific historical documents. Former industrial, port or railway uses are assessed using the records and images actually available.

Do not transfer regional diversity to individual properties

The administrative district includes urban and rural areas, including parts of the Lower Rhine region, Ruhr area and Bergisches Land. This regional context does not establish findings for an individual property. Its own existing knowledge and proposed works are decisive. A new shaft within existing development, for example, raises different questions for existing evidence from unchanged use without ground intervention. In a project with several subareas, demolition, existing utilities and installations added later can create different working conditions. Planning therefore identifies the current condition and associated evidence needs for each intervention. A technical finding is assigned to its actual investigation volume. Additional groundworks are checked separately against the knowledge available.

Working together

Distinguish the tasks of client, designers and specialist contractor

Client and operator

The client describes the project and provides the existing project documents. The operator adds the requirements for use, access and timing. A coordinating contact agrees the assigned tasks with those responsible. Before commissioning, a clear record is made of which information is missing, who will obtain it and which decision the results are intended to inform.

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 scope. Official requirements and decisions are clarified with the competent authorities concerned. The documents needed for a particular procedure depend on the location and project. The technical report describes the specialist service performed; its conclusions are not presented unchecked as general authorisation for further groundworks or as an authority's decision.

Investigation task

Which specialist task comes next?

Define the findings required before choosing the method

The specific question raised by the next ground intervention is clarified first. Existing results and survey limitations form part of this assessment. The method is then selected according to the task and site conditions. An earlier result does not determine the later method on its own, and an uninterpretable survey does not establish the absence of a hazard in the area concerned.

Assess historical documents

Assess technical feasibility and permissible commissioning together

A possible supplementary investigation must be technically suitable and permissible within the specific NRW procedure. The tasks of the competent authorities and permissions required are considered before a private agreement. The commission identifies its question and limitations. A general service description replaces neither assessment of site conditions nor coordination of necessary steps.

Compare investigation methods
Project types

Build a reliable task description from complete documents

Illustration: two people review plans and documents at a table beside a construction vehicle.

Provide result text and maps together

A map shows spatial relationships, while the accompanying text explains purpose and meaning. Therefore provide the complete response, including appendices. An extract may omit important limitations. Technical assessment considers the whole document and current intervention, not a colour or individual area marking alone.

Document findings and their limitations
Illustration: two people review plans and documents at a table beside a construction vehicle.

Distinguish a recommendation from an investigation carried out

A recommended measure describes a further step. Separate result documents establish whether and to what extent it was implemented. These are allocated specifically. An older recommendation must neither be treated as a completed investigation nor automatically commissioned again without checking existing evidence.

Document findings and their limitations
Illustration: two people with a tablet beside a drawing table and a survey trolley on a construction site.

Describe known interference conditions specifically

Existing infrastructure and metal installations may affect the interpretive capability of a survey. Known limitations are supplied with their spatial reference. For the next task, it is assessed which findings are needed and which conditions exist. A general term such as developed is insufficient to assess the complete investigation scope technically.

Specialist services and investigation tasks
Preparation

Prepare the scope and commission together

The investigation objective and suitable methods are determined from the planned construction task and existing findings. Which activity may be commissioned privately under the specific North Rhine-Westphalia procedure is clarified separately before an agreement. For the quotation, the information required, affected area and contributions of other parties are identified. Where a project involves several specialist questions, the ordnance commission is described with its own intended results. Specialist preparation establishes which details are already sufficient and what information is still needed before the work.

Establish what needs to be known before commissioning the work

Complete assessments with maps, explanations and associated result reports are compiled for the commission. Recommendations and investigations actually carried out are recorded separately according to their status. Proposed groundworks are described by location, depth and construction method. This allows it to be established whether documents first need interpretation, further ground volumes need investigation or assessed findings need further work. The permissible commissioned specialist service and required results receive this scope. A cropped map or single result sentence does not replace a check of the complete findings.

Define the specialist task

Coordinate preparatory work with the investigation

Before work is carried out, the survey areas actually accessible, known utilities and interfaces with other trades are clarified. Limitations in earlier reports are compared with present conditions. Preparatory work required depends on the method and site. Additional opening-up work or other interventions to create investigation access are prepared by specialists and are not undertaken independently. A map is read with its text so that indications of outstanding areas are retained during deployment preparation. Changes are checked against the agreed commission before the work concerned.

Clarify preparatory work in the programme

Agree a clear scope and schedule

The commission describes the outstanding specialist task and the results required from it. Assessment and handover of results are part of the process. Effort and dates depend on actual access, documents and coordination. A recommended investigation is recorded with its work status until a corresponding result report exists. The text and plan versions used are allocated together. Further groundworks are compared with the documented scope. A new overall project plan does not automatically replace appendices to earlier specialist reports that are still needed.

Discuss the scope and schedule
Tasks at the site

Make documents understandable for the new project

01

Obtain the complete documentation

Request the associated text, appendices and any subsequent additions along with the map. Check that plan designation, date and area considered match. An image extract from a meeting may cut off important information. Technical assessment requires the original findings with their limitations. For a utility or transport project crossing several municipalities, subareas are coordinated with the respective responsible local offices. The shared plan identifies their boundaries and associated responses. If a later design relocates an intervention, it is assessed which area and document are affected. The previous report retains its original reference.

02

Distinguish indications from results

Distinguish a recommendation for further investigation from a report on work actually completed. File both documents in the correct order. A marked position may prompt an investigation without its result already being available. Explicitly record missing reports rather than assuming completion. The overview identifies the date, commission and associated plan appendices for each document. An earlier assessment of another structural element is not allocated solely through a shared address. Specialist planners compare the ground volume actually addressed with the new works and record which findings can be used for the next decision.

03

Enter new structural elements on the plan

Show which foundations, utilities or shafts are to be newly built or modified. Add the respective intervention depths and elevation reference. An old site plan of the building is insufficient if the proposed works are beside or beneath it. The comparison addresses the actual construction task, not merely the postal address. For an excavation pit, for example, the foundation area, proposed shafts and lateral utility connections are shown separately. An axis moved subsequently receives an identifiable revision. The specialist bodies involved can then identify the new subarea that needs assessment and the earlier information that still describes the same intervention.

04

Clarify differences between the site and documents

Identify known alterations, filling or changes insofar as documents exist for them. Such information is incorporated into specialist assessment without already inferring an absence of danger. If the ground elevation in an older report cannot be traced, this question must be clarified before its depth information is used for new plans. Use a traceable reference for existing and proposed elevations. A geotechnical report may provide information about the layer sequence but must be assigned to the correct location for that purpose. Where elevations differ or the ground is only partly investigated, the outstanding question is identified and clarified before the documents are used together.

Project documents

Documents that establish the next step

Retain the complete findings at every handover

Result text, maps and documented limitations are passed on together. Summaries receive an identifiable reference to the original. They must not extend its scope of findings. For completed clearance work, the clearance record with the actual clearance scope and results is also kept with the original document set and assigned to the areas addressed on the site plan. During handovers between owner, designers and construction teams, this preserves a traceable record of the areas actually assessed and the questions still outstanding for the proposed intervention. For each construction section, the handover identifies the plans used and their spatially associated findings. Site management receives the limitations affecting its immediately approaching works. Outstanding conditions are recorded together with the responsible party and the next step required. This status is passed on in full if the contractor changes.

Record the comparison with new plans

The current location and depth are compared with existing documents. Applicable findings can be taken into account specifically; differences receive their own assessment. The plan revision used is documented. An unchanged property name is insufficient if the construction method, working space or intervention depth has changed from the earlier work. A deeper foundation may raise different questions from a simple shift on the site plan. Therefore identify the changed geometry and documents concerned in each case. The responsible parties assess the change within their specialist remit and bring their results together with the current design. An earlier quotation is related to its actually agreed scope.

Construction sequence

Coordinate investigation and construction sections

Compile existing responses in full

Request result texts, maps and appendices for the areas concerned. Add the current construction plan and known changes since the earlier work. Identify missing reports clearly. Specialist coordination can then distinguish which findings are already usable and where further clarification is needed for the specific construction work. For the service specification, preparation, possible investigation, interpretation and handover are clearly distinguished. Identify who provides access, utility information and existing reports. Outstanding responses are also identified with their actual work status. The enquiry can thus focus on the outstanding specialist task and proposed construction section.

Coordinate the construction phase with us

Resolve outstanding questions before the next intervention

Assign new responses to the subareas concerned and the current plan. Documented survey limitations remain visible until appropriate specialist findings exist. Site management receives the consolidated status with complete appendices. A single message or coloured overview is not treated as completion without its technical context. Before work resumes, the plan and report versions are checked together. A new site organisation receives the information relevant to its task on investigated, uninvestigated and partially assessable areas. The handover note identifies outstanding questions and the body with which further work is coordinated.

Coordinate the construction phase with us
Method selection

Select methods according to the task and survey conditions

Historical records and aerial photographs

Historical aerial photograph analysis and other earlier records help establish the spatial basis of a suspected hazard. Images, interpretive capability and area boundaries are related to present-day groundworks. An absence of visible findings is not a technical investigation of the present-day ground. Other existing knowledge is incorporated. The text and map sections of the official assessment are read together. Object-specific indications, area-related findings and information about earlier checks retain their respective meanings. A map presentation is not declared evidence of specialist work carried out without its accompanying explanation.

Understand aerial photograph assessment

Magnetometric survey

Magnetometric methods detect magnetic anomalies. Suitability is assessed in relation to expected objects, ground conditions, interference and the ground volume requiring investigation. Utilities, fences and existing structures can affect interpretation. Signal strength alone does not identify explosive ordnance. Surveying, assessment and further clarification are linked to the specific specialist task. If a survey is recommended, its implementation and actual result scope are checked using separate reports. The recommendation text alone does not document survey data already obtained.

Understand the scope of magnetometry

Electromagnetic methods

Electromagnetic investigations may be suitable for certain metallic target objects and site conditions. Selection considers the findings required, accessible survey areas and interfering installations, rather than equipment availability alone. Results are documented with their location and actual investigation conditions. Additional work required follows from specialist assessment. An earlier plan marking is linked to its underlying report. Identical or similar presentations in several documents do not, by themselves, confirm the same method or matching investigation scope.

Understand electromagnetic surveying

Ground-penetrating radar

Under suitable conditions, ground-penetrating radar can provide information about subsurface structures and reflections. Ground conditions, moisture and installations affect interpretability. A reflection is not automatically explosive ordnance; an area without anomalies does not confirm any arbitrary depth. Specialist interpretation and limitations are documented with the commission. Existing radar reports are read according to their investigation purpose and coverage. An extract showing only the investigated area does not replace information about the findings actually possible and their limitations.

GPR and limitations

Deep-ground and downhole surveys

For deeper interventions, it may be necessary to assess whether investigation from the surface can provide the findings required or whether another approach is needed. Positions, depths, reference elevations, borehole layouts and known utilities are prepared for this purpose. Creation of suitable investigation access is also planned by specialists. A standard grid or general depth figure does not replace this task. Documented depth and method information is read together with the mapped area. Its graphical extent alone does not confirm any arbitrary investigation depth for a new foundation.

Prepare deep interventions

Survey during construction

If a necessary advance investigation cannot be completed in full, it is assessed whether a specialist-planned approach accompanying construction is suitable. Investigation, interpretation and communication of findings are linked to the groundworks actually proposed. Visual observation of excavated material alone does not replace a necessary survey. Site management receives the allocation of specialist work and outstanding areas to the work sequence. A recommendation for accompanying specialist work is distinguished from its actual implementation. Reports bring the areas addressed, results and remaining limitations together traceably.

Agree the approach during construction
Technical assessment

Assess the interpretive capability of an investigation within existing development

Distinguish historical documents from technical records

The historical aerial photograph analysis examines earlier images and indications. A technical report, by contrast, describes the investigation actually carried out on site. Both may matter for planning but do not answer the same question. Record which knowledge comes from which document and which findings are still lacking for the new measure.

Consider remaining survey limitations

A survey may be limited by existing utilities, foundations or other influences. The Düsseldorf FAQ explicitly identifies areas where existing infrastructure may make survey data uninterpretable. A summary must not present such an area as investigated without limitations. The next approach must be coordinated by specialists for the specific task.

Derive additional work from the need

A clearance plan can bring existing knowledge and necessary further measures together. Whether new investigations are needed is assessed against the proposed intervention and the reach of previous results. An older report is neither unusable solely because of its date nor automatically sufficient. What matters is whether its documented findings fit the present-day construction task.

Next steps

Establish a reliable work status from the documents

01

Organise reports by area

File documents with their respective spatial allocation. If several buildings or subareas are concerned, maintain an overview in which the original reports remain accessible. A collective term such as whole site must not imply that every area has been addressed to the same extent. Initial contact identifies the project address, proposed works and current plan revision. Specialist planners check existing explosive ordnance reports for their area and depth references, limits of findings and identifiable gaps. They assign official indications and investigations already carried out to their respective functions. The document overview shows which results are usable for the new construction task and which question still needs an answer.

02

Supplement historical findings where needed

Existing aerial imagery analyses and historical indications are related to the present-day project area. Where the basis is incomplete, the necessary supplementary research or aerial imagery analysis is carried out through the appropriate specialist or official route with its question defined. The findings obtained are assessed together with previous use and current plans to determine investigation needs. An entry in the town's history is first checked for its actual relevance to the property.

03

Define the specific question

Describe the decision required for the next construction section. Does it concern a new utility location, a deeper foundation or an ancillary area not previously covered? A clearly described task makes existing results easier to assess. It also prevents commissioning the same measure again merely out of habit. Investigation planning selects suitable methods according to the findings required, intervention depth and actual site conditions. Existing utilities, installations and interference are considered. The commission describes its spatial scope and the prerequisites for its execution. The area drawn remains linked to the specific construction task if the foundation or utility route changes.

04

Discuss outstanding points with the parties involved

Coordinate missing evidence, differences in plans and investigation limitations before the work concerned. Involve the local regulatory authority and commissioned specialists according to their tasks. A private compilation of reports does not replace a necessary official decision. Conversely, existing reliable results should be taken into account in specialist coordination. On this clarified basis, specialist personnel carry out the investigation or agreed supervision permitted within the relevant legal and technical scope. Data are recorded with spatial reference, site survey conditions and limitations. If conditions change, the further approach is coordinated. A suspicious find triggers the prescribed reporting and hazard-prevention procedures.

05

Assess and clearly document findings

The data and findings collected are professionally assessed in the context of the investigation objective, method and site conditions. Interference and areas that cannot be investigated remain identifiable. The report documents the work carried out, results, location and depth references, and limitations; maps and attachments remain connected to it. Any further clarification required is assigned to the affected area. A measurement anomaly is professionally assessed and is not identified as a particular object solely on the basis of the measurement signal.

06

Pass the agreed scope to the construction team

Site management needs the documents relevant to the work area and the agreed limitations. Also identify the underlying plan revision. If structural elements are subsequently relocated or depths changed, the earlier comparison must be checked again. A report does not change its scope of validity with every new construction drawing. The assessed report and associated plans are handed over together for the next construction phase. Site management compares its approaching works with the investigated area and documented limitations. Outstanding tasks are assigned a responsible contact and a reference to the next intervention. The plan and report revisions used remain traceable for later additions.

Documentation

Retain records with their limitations

Findings and their scope

Result documentation includes spatial reference, depths covered, methods and limitations. A short handover overview can make this information accessible but should not replace the original report. Particularly for later alterations, it matters which areas were actually addressed and which questions lay outside the commission at that time.

Project responsibilities

FONTANA-EOD addresses the agreed specialist investigation and documentation tasks. The state explosive ordnance disposal service and local regulatory authorities remain responsible for their respective tasks. The BFR Kampfmittelräumung apply directly to federal properties; their principles on planning and evidence may be used as technical guidance for other projects.

Working approach

How FONTANA-EOD works

Document the agreed specialist service clearly

FONTANA-EOD addresses the agreed specialist task for the plan revision and ground volume described. Before work begins, complete earlier findings are compared with results still required. Accessible areas and prerequisites are coordinated. Changes to plans or site conditions are checked before the work concerned. The report documents the work actually carried out and its limitations. Site management can distinguish official indications, specialist work carried out and outstanding tasks in the project status.

Discuss the investigation task

The task before the equipment

Method selection starts with the knowledge lacking for the current construction task. Specialist planning considers existing results, the ground and actual conditions. Available equipment or a colour marking in an overview does not suffice as the sole basis. Selection is justified for the ground volume concerned. The complete explanation shows the meaning of an earlier presentation and the work to which it actually refers. Outstanding questions are identified before further specialist work is planned.

Keep limitations visible

Inaccessible areas and areas with limited interpretability are identified with their actual boundaries. Site management can allocate outstanding specialist work and necessary additions to them. A general overall area figure does not replace this distinction. Planning and construction teams coordinate when a suitable investigation will be possible. Indications of missing data or limited interpretive capability are retained in a shared project overview too. A shortened plan extract is not used as a finding with a broader scope.

Clarify changes before intervening in the ground

A new location, additional depth or different construction method is compared with existing results before the work concerned. Specialist planners receive the identifiable change to the task previously considered. Their response and necessary additions are assigned to the ground volume concerned. Text and plan appendices are considered with their respective revisions. An unchanged map colour does not, by itself, confirm either an unchanged intervention or findings that still apply to this new work.

Hand over the report and plan together

At handover, reports and associated plan appendices are supplied in full with their work status. Map legends and technical explanations remain linked to the presentation. An overview may list usable findings and outstanding tasks; it does not replace the documented investigation scope. When designers, site management or companies change, recommendations, specialist work actually carried out and results remain distinguishable. A new summary retains the essential limits of findings rather than merely passing on the visual appearance of an earlier map.

Understand the results

Use technical statements for the next decision

A map colour needs its explanation

Colours and symbols derive their meaning from the complete report and associated legend. Individual extracts can lose their technical context. Therefore read the map and text together. Only comparison with the investigation scope described establishes which findings apply to the specific proposed construction area.

Understand investigation reports and their limitations

A survey limitation remains relevant for later planning

An area that cannot be assessed sufficiently represents a documented limit of findings. Changed infrastructure may affect the subsequent task but does not itself generate a new investigation result. Additional needs for an intervention planned there are determined by specialists. Usable findings for a neighbouring area do not automatically resolve this outstanding question.

Understand the service scope
Design and findings

Documents for the next construction decision

Illustration: aerial photographs and maps on two screens and printed on a desk.

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 assessment
Illustration: two people review plans and documents at a table beside a construction vehicle.

Specialist 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
Person in an orange high-visibility vest with a MALÅ survey cart on a meadow.
Person in a high-visibility vest in front of a marked construction area with piles of soil.
Questions from planning

Questions about existing analyses and new groundworks

Is the map from an aerial photograph analysis sufficient?

No. According to the Düsseldorf district government's guidance, text and map together form the complete assessment. Use both parts and their associated appendices so that indications and limitations are not lost. Clarify the procedure required with the responsible parties before the groundworks concerned.

Does an older investigation report demonstrate suitability for a new building?

This can only be assessed after comparison with the current plans. The report must cover the area, depth and question required. Its age alone does not answer this question, nor does the same property address.

How should uninterpretable areas be treated?

They remain identifiable as a limitation of the result. For proposed groundworks in such an area, the next approach must be clarified by specialists and with the competent authorities. Uninterpretable survey data do not demonstrate the absence of explosive ordnance.

Does a result apply to several properties with the same owner?

The investigation scope documented in the report is decisive. Shared ownership does not extend it. Therefore assign documents to their respective areas and proposed works; areas not covered retain their own need for clarification.

Who should I contact about a suspicious object?

Stop the affected work, leave the object where it is and keep your distance. Neither touch nor move it. Keep others away and immediately notify the police on 110 from a safe distance. The authorities determine the next steps.

Is a screenshot of the results map sufficient?

Complete assessment also requires the result text, legend and appendices. They explain the meaning, scope and limitations of the areas shown.

Does a recommendation prove that the investigation has already been carried out?

No. The associated result documents are needed for that. The recommendation and work actually documented remain separately traceable.

Does new infrastructure remove survey limitations, and which cost factors matter?

No. The changed conditions are assessed for the new task. Reliable new findings arise only from appropriately coordinated specialist work. Effort also depends on area size and accessibility, proposed intervention depth, suitable methods, interference and usable earlier findings. Preparatory services, interpretation and documentation required are agreed for the specific task with their scope. Cost information concerning official hazard prevention is distinguished from privately commissioned services.

Project enquiry

Compare complete results with current construction work

Attach complete results

Send text, maps, legends and other associated appendices together. Compile the existing assessment with its text and map, further investigation reports and the current construction drawing. Identify newly affected areas and depths. On this basis, FONTANA-EOD can discuss the specialist comparison required and any further tasks with you.

Show current interventions

Show the location, depth and known changes from earlier investigations. Also tell us which groundworks are due to begin first and which areas are not yet accessible. Necessary preparatory work and handover of results can thus be coordinated in good time.

Project enquiry

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.

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