Regional map for North Rhine-Westphalia with the state coat of arms, a tablet, safety helmet and notebook.

Explosive ordnance surveying in Wesel when construction areas expand

Several documents relate to a construction area: an older assessment covers the original area, while a later response covers only the extension. Both are needed for execution. FONTANA-EOD helps you bring together explosive ordnance documents for your project in Wesel according to their area, processing status and planned construction task.

Earlier area

Establish the scope of older documents.

Extension

Identify additional areas and new interventions.

Overall project

Compare partial reports with the current site plan.

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

Read multiple assessments together with their respective areas

For a project in Wesel, older findings and later additions may remain relevant alongside each other. We relate existing documents to their actual areas and today’s intervention plans. Missing appendices and tasks not yet covered remain explicitly identifiable in further planning.

Project references

Selected project examples

Project site

Connect the site with the specific construction task

Regional map for North Rhine-Westphalia with the state coat of arms, a tablet, safety helmet and notebook.

Existing documents for the project in Wesel

For construction projects in Wesel, existing statements, investigation reports and appendices are connected with the current intervention plans. Official requirements are clarified with the local regulatory authority, which is supported in explosive ordnance disposal by the state explosive ordnance disposal service. The permissible private specialist service is agreed with its specific investigation objective.

The overview of the Düsseldorf administrative district provides further local information for the regional context of your construction project.

North Rhine-Westphalia
Local context

Assign historical findings to the present-day construction area

The Wesel urban development strategy 2022 describes the destruction in February 1945 and reconstruction on a largely retained street plan. For explosive ordnance assessment, historical city plans, aerial photographs and other documents are connected with the location of the present-day intervention. Image dates, source coverage and identifiable changes to the construction area remain traceable. A similar street layout alone does not describe an investigated ground volume. Earlier technical reports and the current plan are therefore brought together with their actual spatial references.

Additional area covered by the 2014 statement

The documents published by the City of Wesel for development plan No. 62 “Flamer Weg-Süd”, 3rd addition, include a KBD statement dated 20 August 2014. For areas already assessed, it refers to an older statement of 14 October 2013 and limits its own recommendations to the additional area.

Distinguish the historical statement from today’s project

The new recommendations of 2014 concern the additional area of the planning procedure at that time. For a present-day expanded construction project, establish for each document which area and state of knowledge it describes. The most recent document does not necessarily replace all earlier findings. Technical assessment therefore also requires the documents expressly referred to and the current plan of the proposed intervention.

Investigation task

Which specialist task comes next?

Derive the need for additions from the comparison

The current construction task is compared with the substantiated findings. Only this comparison shows whether further historical clarification, an on-site investigation or more precise planning information is needed. The requirement is described for the affected area. It implies neither blanket repetition of all earlier steps nor complete omission of them.

Assess historical documents

Coordinate the specialist service and official procedure

Supplementary private work is agreed with a clear objective and permissible scope. The specific requirements in NRW must still be observed. Official findings and pending decisions remain identifiable in the project status. Older documents provide supporting information but do not replace any necessary coordination concerning today’s plans.

Compare investigation methods
Project types

Preserve the connection between the original status and the addition

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

Trace references to older documents

A later statement may continue to refer to an earlier result for a subarea. Obtain the documents mentioned, including their appendices. A more recent date does not then automatically replace the older content. An overview records which findings belong to which area and which documents remain missing.

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

Compare map boundaries with today’s plan

Compare the areas identified in the documents with the current project. The original and additional areas remain distinguishable. Unclear boundaries are not resolved through an unchecked assumption. For further coordination, specify where the current intervention extends beyond the traceable findings. For scheduling, also identify who organises access to the different subareas and provides existing utility records. For construction phases separated in time, record which information is already confirmed and which requirements can only be fulfilled before the later investigation.

Specialist services and investigation tasks
Illustration: two people review plans and documents at a table beside a construction vehicle.

Distinguish recommendations from execution

A technical recommendation describes a task still to be clarified or carried out. Whether it was subsequently addressed follows from the corresponding evidence. Therefore record existing results separately from planning guidance. A mere mention in a planning procedure is not treated as a completed investigation of today’s construction project.

Document findings and their limitations
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

Specialist planning describes areas, depths, construction methods and changes. Site management coordinates the proposed work sequence with contractors and the agreed specialist works. Results are related to each intervention. A technical plan change is communicated early enough for its influence on the investigation task to be assessed before execution. Organisational construction phase boundaries remain distinguishable from technical investigation boundaries. Identify the corresponding plan version and geometric change for specialist assessment. A trench moved laterally and a deeper foundation affect different investigation volumes. Comparison with an older report therefore requires both the earlier boundary and the current intervention.

Specialist company and competent bodies

The private ordnance specialist contractor undertakes the agreed investigation and documentation scope. Official requirements and decisions are clarified with the respective responsible authorities. Documents needed for a specific procedure depend on the site and project. The technical report assigns the specialist service performed and its findings to the planned ground intervention. Other specialist assessments and official decisions are handled within their respective remits.

Preparation

Prepare the scope and commission together

Whether an investigation task may be commissioned privately depends on the specific North Rhine-Westphalia procedure and applicable legal conditions. The permissible activity is clarified before an agreement.

Establish what needs to be known before commissioning the work

For the project in Wesel, older documents and later additions are brought together according to their actual areas. For each document, identify its processing status and references to other documents. The current intervention plan shows which findings are still missing for the original area and extension. This determines the next specialist task: interpret documents, investigate additional ground volumes or further address previously assessed findings. The commissioned service and results documentation needed relate to that specific task. A more recent date alone does not describe a complete investigation scope.

Define the specialist task

Coordinate preparatory work with the investigation

Before the investigation appointment, clarify the measurement areas actually accessible in the original area and extension. Known utilities, installations and coordination with other trades belong in preparation. The method and site determine which preparatory works are necessary. Additional breaking up of surfaces or other ground interventions to provide measurement access are technically coordinated beforehand with the responsible participants and not undertaken on personal initiative. Access conditions are related to the relevant subarea rather than transferred unchecked from an earlier report to the extension.

Clarify preparatory work in the programme

Agree a clear scope and schedule

The commission describes which areas are to be supplemented and which existing results remain part of planning. Partly accessible areas and outstanding requirements are considered in the scope. Dates and effort depend on actual access, documents and coordination; assessment and handover are part of the process. For a construction phase affecting several report areas, their relationship is clarified before execution. A changed groundworks sequence is considered in relation to this state of knowledge. Appendices still missing remain identified as specific outstanding documents.

Discuss the scope and schedule
Tasks at the site

Check multiple partial reports against the current construction plan

01

Follow references

Look in newer documents for file references, dates and references to older appendices. Request missing documents. A summary without the original report it names may omit important limitations. Keep open what cannot yet be assessed until the original is obtained. Enter the original document mentioned with its date and file reference in the document register. While a corresponding map is missing, the spatial relationship remains unresolved at that location. Mark provisional information so that it can be identifiably checked in further planning.

02

Different elevation references

An old report states an investigated depth, while the new plan uses a different ground or elevation level. Clarify both references for comparison. The technical allocation records which volume was actually investigated and which findings are needed for today’s foundations.

03

Changed property boundaries

An earlier document uses an area designation that no longer appears in the same form on the current plan. The original map and current geometry are brought together traceably. Affected subareas remain unresolved until clearly identified; a new cadastral boundary does not by itself extend the documented investigation volume.

04

Groundworks separated in time

An extension is to be carried out after the first construction phase. For both steps, the interventions, existing results and outstanding specialist works are identified separately. Site management receives the respective processing status so that access and investigation appointments can be coordinated with the work actually proposed.

05

Keep areas distinct

Enter the areas addressed in a shared overview. Distinguish the original area, the extension and areas whose identification remains unclear. A continuous property boundary does not prove that all subareas were assessed or investigated in the same way. Use the same designations consistently for these areas. For comparison, retain the map base, scale and any coordinate information. If different reference systems were used, clarify the technically correct combination before inferring an investigation scope from a graphical overlay.

06

Distinguish processing steps

Identify historical assessments, applications, communications and investigations actually performed as different document types. Recommending an investigation does not prove it was performed. Completion of a subarea requires the corresponding results evidence, not merely the earlier application. A response concerning planning and a report of completed specialist work are recorded for their respective purposes. For sections already addressed, execution, date and result must be traceably related. Missing execution evidence remains a separate outstanding task in further coordination.

07

Add new structural elements

Compare the current interventions with the tasks covered by the reports. An additional excavation or changed foundation may raise questions different from the previous design. The specific comparison determines whether supplementary services are needed; a document’s age alone does not answer this. Also show individual deeper structural elements and connections within an outline already drawn. An old area plan may show the same property boundary yet concern a different construction task. Specialist planning therefore compares the area, elevation reference and type of proposed work.

Project documents

Documents that establish the next step

Document the complete relationship

A compilation identifies the original document, additions and corresponding appendices with their respective references. Results are not reduced to a single date. This keeps clear which findings are relevant to which area. Later participants can compare the documentation with the execution actually proposed. Link the overview to clearly identified original documents. When files are replaced, older versions remain identifiable as earlier processing stages. For site management, record which relevant plan version is to be used in the next section and which technical responses belong to it. Following clearance work, the clearance record with the areas actually treated, clearance scope and results is added to this overview as a separate document with its site plan.

Identify unresolved areas when handing over

Missing maps, untraceable boundaries and outstanding investigation results are explicitly recorded. An overview must not conceal these gaps. Further specialist planning can derive specific tasks from them. A complete folder does not necessarily provide sufficient findings for every planned ground intervention. If information conflicts, identify which spatial or substantive relationship still needs clarification. An assumption about an old map extract is kept separate from a substantiated finding. Participants agree who obtains the original document or a reliable explanation.

Construction sequence

Coordinate investigation and construction sections

First establish the document sequence

Collect the original documents mentioned, additions and later results. Arrange them by their spatial and technical relationships. Identify missing components. The current construction plan can then be compared with a traceable status rather than using only the most recently dated document as the sole basis.

Coordinate the construction phase with us

Compare today’s task before execution

Check which findings actually exist for the imminent works. Additional depths, construction methods and extension areas are considered separately. Results are related to the respective sections. Site management receives a clear set of documents with outstanding questions and the processing status actually reached.

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 context of grounds for suspicion. Where there are several assessments, the images examined and area boundaries are related to each document. Availability and information value limit the historical findings. The absence of a visible indication is not a technical investigation of today’s ground. Express references to older assessments are included. The historical assessment is connected with other results and the current construction task; findings for an extension do not provide blanket confirmation of the original area or all later interventions.

Understand aerial photograph assessment

Magnetometric survey

Magnetic methods detect magnetic anomalies. Suitability for the areas actually needed is assessed using expected objects, ground conditions and interference. Fences, utilities and existing structures may affect assessment. Signal strength alone does not identify explosive ordnance. Measurement, assessment and necessary further clarification are planned together. New results receive a clear location reference to the earlier report areas. The shared representation distinguishes which area was actually addressed under which conditions.

Understand the scope of magnetometry

Electromagnetic methods

Electromagnetic investigations may suit certain metallic target objects and site conditions. Selection is justified using the findings required, accessible measurement areas and interfering installations, not instrument availability alone. Results are documented with their location and investigation conditions. Any necessary supplementary method follows from technical assessment. When an area expands, the scope of new results is connected with the earlier documents. A comparable method name does not establish matching measurement conditions or ground volumes covered.

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 influence assessability. A reflection is not automatically explosive ordnance; an unremarkable area does not confirm any arbitrary depth. Interpretation and limitations are documented with the commission. Existing radar documents prepared for other purposes are checked for their objective and scope before use as evidence concerning explosive ordnance. For an extension, establish whether the area actually covered matches the newly planned interventions.

GPR and limitations

Deep-ground and downhole surveys

For deeper interventions, it may be necessary to check whether investigation from the surface provides the findings needed or whether another approach is required. Position, depth, borehole arrangement and known utilities then belong in preparation. Provision of suitable investigation access is also planned on technical grounds. A standard grid or general depth figure does not replace this task. Results remain tied to the ground volumes actually addressed and the method used. An earlier report is not extended to a new, deeper area merely because an adjacent area has been investigated.

Prepare deep interventions

Survey during construction

If a necessary prior investigation cannot be carried out in full, assess whether a technically planned approach during construction is suitable. Investigation, assessment and communication of findings are connected with the actual construction sequence. Mere visual observation of excavation does not replace a necessary survey. Site management receives the relationship of specialist works, new findings and unresolved areas to the activities concerned. If a construction phase extends beyond earlier report boundaries, the findings still needed are incorporated separately into that sequence.

Agree the approach during construction
Technical assessment

Combine findings from subareas on technical grounds

Compare assessment areas

Read each historical aerial photograph analysis with its complete map reference. Overlapping areas do not automatically mean that identical sources or questions were addressed. Contradictions or missing relationships must be clarified before a shared assessment of the construction project is formed.

Interpret investigation results

For a completed survey, the documented area, investigated depth or objective, and method limitations are decisive. A result for the first construction phase does not become applicable to the extension solely through proximity. Nor can an uninvestigated subarea be treated as complete through a general project heading. Also check which ground or elevation level the documented depth refers to. Subsequent terrain changes may make comparison with today’s plans more difficult. Known changes are included with their documents in the technical comparison, and remaining uncertainties are identified separately.

Define outstanding tasks

The clearance plan can relate investigations still needed and their prerequisites to the current design. Services already performed and outstanding tasks remain distinguishable. Necessary investigations must not be replaced by blanket provision for visual observation during later excavation.

Next steps

Clarify the extension before the affected groundworks

The specialist work required depends on the project and existing findings. Those involved agree the steps needed and their sequence for the respective construction phase.

01

Check the enquiry and documents

Record the date, author, file reference and appendices of existing documents. Identify missing reports and unresolved references. The register supports compilation; it does not replace technical reading or assessment of the individual results. Specialist planning checks the reports against the current construction task for area and depth references, limitations of findings and knowledge still missing.

02

Obtain documents and agree the plan version

Show the extension in comparison with the previous plan and state the proposed interventions. Specialist planners and the responsible authority can then assess specifically which new questions arise. An unchanged project name should not conceal a substantial change in the construction task. Identify the design version relevant to coordination. Options submitted later receive a clear version designation. This makes it possible to clarify whether a new file merely corrects the presentation or submits a different area, depth or construction method for assessment.

03

Review historical evidence

Existing historical assessments are read to establish which areas, points in time and sources they cover. Any necessary supplementary research or aerial photograph analysis is agreed with its specific question and carried out through the intended specialist or official procedure. The result is connected with earlier investigations and the current intervention plans.

04

Plan the investigation

The investigation objective and suitable methods are defined on specialist grounds. Depths of groundworks, utility information, accessible areas and local interference are considered. Scope and conditions for carrying out the work receive an unambiguous spatial reference. Coordination also identifies the prerequisites still to be met before specialist work begins.

05

Carry out the investigation

Clarify with the responsible regulatory authority which official steps are required for the current status. Specialist services are commissioned with an unambiguous area and task description. A historical recommendation from another planning procedure is not an execution instruction for your property. The agreed specialist works are performed using the technically determined method within the established space. Actual execution conditions, findings and limitations are documented. New findings are communicated through the agreed reporting channels and assessed for their influence on the subsequent approach.

06

Assess findings and their significance

Results and findings are assigned to the ground area and volume actually investigated. Limitations and outstanding areas remain separately identifiable. Additional suspected ordnance is clarified with the competent authorities. The assessment describes the specific findings available for the next project decision.

07

Document the investigation

The report describes the work carried out with its location, method, results and limitations. The associated maps and attachments remain connected with the text. The stage of work is handed over so that site management can compare the investigated area with the proposed groundworks.

08

Coordinate the result and next construction phase

Bring the results for the individual construction phases together without removing their limitations. Site management must be able to identify which documents concern its works and which questions remain open. Later additions are incorporated with their actual scope of application. Before the next section, compare the results handed over with its specific works. Outstanding responses and subareas not addressed remain identifiable. Contractors receive the relevant plan version and limitations applicable to their working area.

Documentation

A shared overview retains the limitations of the partial reports

Findings and their scope

An overview can make documents easier to find but should not make broader claims than the underlying reports. If subareas or particular interventions remain unresolved, identify this visibly. Retain the original documents and appendices; an abbreviated handover list alone is insufficient to trace their technical limitations.

Project responsibilities

In North Rhine-Westphalia, the local regulatory authorities are responsible for hazard prevention concerning explosive ordnance; the state explosive ordnance disposal service supports them. FONTANA-EOD provides the agreed specialist service within the clarified requirements. The BFR Kampfmittelräumung are used for planning and documentation principles, providing technical guidance outside their direct scope on federal properties.

Working approach

How FONTANA-EOD works

Document the agreed specialist service clearly

FONTANA-EOD carries out the agreed specialist task for the identified areas in Wesel and current plan version. Existing and supplementary documents are included with their respective scope of findings. Accessible areas and results needed are agreed before execution. Changes to plans or site conditions are checked before the affected works. The report documents the work actually performed and its limitations. Site management can relate the available partial findings to today’s execution and identify outstanding clarifications for additional areas.

Discuss the investigation task

The task before the equipment

Method selection begins with the knowledge missing for the new area to be addressed. Specialist planning considers existing results and the actual conditions of the additional ground volume. An available instrument or a method previously used in a neighbouring area is not a sufficient basis on its own. The approach is justified for the current task. The supplementary work is described with its own investigation objective and relationship to the previous results.

Keep limitations visible

Inaccessible areas and those with limited assessability are identified using a shared location reference. Site management can then distinguish areas already assessed from those still needing supplementary work. A general overall area figure does not replace these limitations. Planning and execution coordinate when a suitable investigation will be possible. Even at the boundary between the original area and extension, it remains clear which report actually covers the next activity.

Clarify changes before intervening in the ground

If the area, depth or construction method changes, compare the new version with existing results before the affected work. Specialist planners receive the changed design with its relationship to earlier report areas. Their response and necessary supplementary works are related to the affected ground volume. A more recent document or unchanged project name does not replace this comparison. Older documents expressly referred to also remain available for technical interpretation.

Hand over the report and plan together

Reports and plan appendices are handed over in full with their cross-references. An overview can show which findings concern the original area and which concern the addition. It does not replace the investigation scope documented in each case. If site management or contractors change, these connections and outstanding tasks remain traceable. The next activity uses the appropriate basis from the corresponding set of documents rather than assuming that the most recently dated document alone provides complete evidence.

Understand the results

Use technical statements for the next decision

The latest date is not the only deciding factor

What matters is what a statement actually supplements, replaces or assumes to remain unchanged. Therefore also read the older documents mentioned. Spatial references may differ between documents. A traceable compilation assists comparison without deriving a broader technical conclusion from the chronological sequence. Establish the connection between the initial document, the report it refers to and the corresponding map. Changed street names or property boundaries may require additional information for identification. The decisive factor remains the investigation volume actually documented and its relationship to today’s construction task.

Understand investigation reports and their limitations

An extension needs a clear reference

Show which area is being added and which works are proposed there. Compare existing results with this change. This retains the usefulness of what has already been addressed traceably. Further requirements for new or unclear areas are determined separately rather than treating the whole area as equivalent.

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 extensions and older documents in Wesel

Does the latest document automatically replace all earlier reports?

No. Check the scope described and references to earlier documents. A later statement may address only an additional area. The older documents that remain relevant are then also needed for the overall assessment.

May I use the published Flamer Weg-Süd statement for my property?

The statement from August 2014 belongs to a specific historical planning procedure. It does not establish present-day findings for your property. Your project’s area, current state of knowledge and necessary steps must be clarified separately.

Is an earlier recommendation sufficient evidence of investigation?

A recommendation or application does not establish that an investigation was performed. Obtain the corresponding results report and its appendices. If this evidence is missing, the actual processing status remains open pending further clarification.

Must an extension area always be investigated again?

An additional investigation is not inferred solely from the term extension. First compare existing findings, work already documented and the interventions now planned. This establishes further clarification requirements and, where applicable, additional specialist tasks.

What applies if a suspicious object is found despite existing reports?

Stop the affected works. Do not touch or move the object; move away and keep others away. Report the find to the police immediately on 110 and follow the authorities’ instructions. Existing reports do not replace this response.

How is an older document expressly mentioned treated?

It is obtained with its appendices and read together with the later statement. What matters is which area and which subject matter each covers.

Which documents demonstrate implementation of a recommendation?

The corresponding investigation or execution records with their actual scope. The recommendation itself does not document completed work.

What helps when area boundaries are unclear, and what determines the cost?

Complete maps, a current intervention plan and clear identification of the uncertainty. The further step needed is agreed on technical grounds and with the responsible authority before the affected groundworks. Effort and cost depend on area, intervention depth, accessibility, method, interference and usable earlier findings. The scope of necessary preliminary services, assessment and documentation is clarified before commissioning.

Project enquiry

Prepare the first technical discussion

Provide the document sequence

Send older findings, additions and the appendices mentioned together.

Show today’s intervention

Mark extensions and areas whose previous status is unclear. State which groundworks are intended to begin first and which subareas remain inaccessible.

GPR on a construction site
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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