Technical map view of the Münster administrative district with Münster marked for explosive ordnance investigation and surveys by FONTANA-EOD

Explosive ordnance assessment in Gladbeck: old documents, new construction plans

For an extension or new utility line, documents from an earlier construction project may still exist. What matters is whether they substantiate an investigation or merely contain guidance from that time. FONTANA-EOD helps compare these documents with today’s planned groundworks and determine the necessary explosive ordnance survey scope in Gladbeck.

Available documents

Distinguish planning guidance from investigations performed.

New construction works

Record position, depth and construction method for comparison.

Outstanding questions

Clarify missing evidence before the ground intervention.

Assess the construction project

Connect earlier planning guidance with actual results

A planning explanation does not automatically describe explosive ordnance work subsequently performed. For your project in Gladbeck, we check which reports and maps actually exist and how they match today’s plans. Missing results or different interventions are identified as specific outstanding tasks.

Project references

Selected project examples

Project site

Connect the site with the specific construction task

Illustrative map of North Rhine-Westphalia with the state coat of arms, a tablet, a white FONTANA-EOD helmet and a notebook.

Use today’s Gladbeck application procedure as the basis

The current municipal service identifies the Amt für öffentliche Ordnung as the contact point. It coordinates further processing with the Arnsberg district government; the Abteilung Allgemeine Ordnung und Verkehr is listed as the responsible organisational unit. Service and sewer connections needed are also considered for today’s works. Older documents supplement that current coordination with their respective documented state of knowledge.

For the enquiry, identify the affected area and proposed groundworks clearly on the current site plan. Include earlier official information and investigation reports in full with their appendices. State which structural elements or utilities have been added and which additional areas are affected today. For service and sewer connections, also show the link to existing networks and additional deeper sections. The application and specialist planning then relate to the same working areas. Missing documents and outstanding questions are assigned to the respective responsible participants. Further project locations are shown in the regional overview.

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

Local context

Older planning guidance is not yet an investigation report

Read the 2001 Gladbeck planning explanation according to its purpose

Gladbeck’s explanation of 1 March 2001 for project-specific development plan 121 on Vehrenbergstraße addresses both contaminated land and explosive ordnance in section 13. The topics appear in the same section but have different objectives. The document contains guidance from that time on further steps required; this alone does not show which investigations were subsequently performed.

The VHS Gladbeck programme from 2021 recalls the air raid of 24 March 1945 and subsequent reconstruction. Historical research considers such local indications together with suitable aerial photographs, building records and other available documents. Former property boundaries, street names and uses are related to today’s intended working area. Documented terrain changes and later development remain identifiable as separate points in time. Findings for the new project are based on specifically related knowledge and planned ground interventions.

Distinguish present-day conditions from an actual investigation

For today’s plans, you therefore need the corresponding results where available. Ask for reports, maps, areas addressed and documented limitations. The historical Gladbeck plan is limited to its area and processing status at that time. Its authority names and execution guidance must not be transferred unchecked to a present-day commission. Current requirements must be agreed with the responsible local authority.

For redevelopment, record for each existing report which question it answers and which area its maps show. A historical recommendation is listed with its date and occasion. An investigation actually performed, by contrast, has its results documents and corresponding plan version. Today’s construction plans are shown alongside these with position, depth and construction method. Usable findings can thereby be distinguished from outstanding specialist tasks. Additional works are directed at the remaining questions and current conditions.

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 work. Requirements and decisions of public authorities are addressed with the responsible bodies. The documents needed for a particular procedure depend on the location and project. The technical report describes the work carried out, including its documented area, depth and scope. Decisions reserved for public authorities are made by those authorities.

In Gladbeck, the Amt für öffentliche Ordnung is the contact point for applications for aerial photograph analysis and cooperation with the state explosive ordnance disposal service at the Arnsberg district government. The client or project sponsor initiates the application and any necessary further investigations. Permissible private specialist works receive a specifically agreed investigation and documentation scope. For project locations outside the city, the locally responsible authority is determined from the actual project address. Any need for ordnance recovery is coordinated with the permissible task and the competent authorities.

Investigation task

Which specialist task comes next?

First establish the substantiated state of knowledge

Arrange existing findings by occasion, area, depth and identifiable limitations. Incomplete documents are not supplemented with assumptions. The question remaining forms the starting point for further specialist planning. A document’s age alone determines neither its usefulness nor its unsuitability for the new project.

Assess historical documents

Limit additions to the new task

Today’s plans are compared with results actually substantiated. Additional interventions or missing findings are identified specifically. A suitable further approach considers current conditions and official information. Before a private agreement, the NRW requirements applicable to that activity are also checked.

Compare investigation methods
Project types

Turn the existing project file into a traceable basis

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

Compile complete versions with appendices

A single page or note in the construction file may truncate a document’s scope. Provide the title, date, maps and supplementary communications together. Different versions remain identifiable. Interpretation clarifies which findings concern planning and which concern an investigation actually performed.

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

Substantiate execution with appropriate results

A commission or invoice alone does not show which areas were addressed or which findings resulted. The corresponding technical reports and appendices are decisive. Missing documents are requested specifically. An announced measure is not treated as a completed investigation status unless the actual work and its scope are traceably available.

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

Do not apply today’s property boundaries retrospectively

Subdivision, consolidation or a new address may complicate identification. Compare the original representation with the current site plan. The scope of findings follows the documented investigation, not a later property designation. Areas that cannot be identified unambiguously are clarified before further planning.

Coordinate the sequence and tasks
Preparation

Prepare the scope and commission together

The following specialist topics explain possible investigation tasks. Which activity may be privately commissioned under the specific North Rhine-Westphalia procedure is clarified separately before an agreement.

Establish what needs to be known before commissioning the work

For the project in Gladbeck, first clarify which documents actually exist. Guidance on further explosive ordnance works in earlier planning differs from a report on investigations performed. Submit existing official information, results and plan appendices together with the current extension or connection. Describe the position, depth and construction method of the new groundworks. This determines whether the state of knowledge must first be interpreted, an additional area investigated or an assessed finding addressed further. Specialist works and results needed receive a clearly described scope.

Define the specialist task

Coordinate preparatory work with the investigation

Before an investigation appointment, check today’s accessible measurement areas and available utility information. Older guidance about areas to keep clear does not necessarily describe the buildings now present. Access for the current method and coordination with other trades are therefore prepared specifically. Necessary preliminary works follow the method and actual site. Additional breaking up of surfaces or other interventions to provide measurement access are agreed with the responsible participants. Such groundworks are not undertaken on personal initiative as incidental preparation.

Clarify preparatory work in the programme

Agree a clear scope and schedule

The commission identifies the new construction task and the knowledge substantiated for it. If results for an earlier proposed investigation are missing, that outstanding question is addressed before the affected execution. Partly accessible areas are considered in the scope from the outset. Dates and effort follow actual prerequisites and include assessment and results handover. Specialist planning records the findings needed for the extension or connection. If position or depth changes, the new version is compared with the agreed commission.

Discuss the scope and schedule
Tasks at the site

Which documents help with redevelopment?

01

Plan and explanation

Compile the complete documents with their dates and areas of application. One sentence from an explanation may relate to a different plan version or larger area. Therefore also retain the corresponding map and the location of the guidance within the document.

02

Investigation performed

An investigation report should show which area was addressed and for which objective. Also check its appendices. An invoice, commission or recollection of a site appointment does not replace this information. Missing results must remain identified as missing.

03

Changed property

Compare earlier and present-day area names if properties or plan outlines have changed. The location of the original investigation remains decisive. A new cadastral parcel number does not extend its findings to neighbouring areas; conversely, an unchanged address does not establish unchanged plans.

04

Upcoming intervention

Mark the new works including their proposed depths. For an extension, this may also include foundation trenches, service connections and other necessary groundworks. Distinguish firmly planned interventions from options not yet decided.

Project documents

Documents that establish the next step

Distinguish document types by their function

A planning explanation, official information and an investigation report may concern the same place yet answer different questions. Identify their respective purposes in the compilation. Chronological order alone does not turn several documents into complete evidence. Substantiated findings for the intervention actually proposed remain decisive.

Compile complete reports with their covers, dates, plan appendices and corresponding official communications. For extracts, record the document they come from and which parts are missing. Provisional plans remain distinguishable from confirmed construction versions. A brief document list identifies the available versions and their respective purposes. For consolidated or subdivided properties, provide old and new names with their spatial relationships. Technical review can then build specifically on the knowledge actually substantiated.

Describe changes since the investigation

New structural elements, utilities or surfaces may be relevant to the further task. Record these changes with their plan version and position. The older report retains its original scope. Whether supplementary work is necessary is assessed using today’s plans, available findings and local requirements.

Site management is shown which current works the results cover. Additional areas, changed depths or locations still only partly investigated remain clearly identified. Results documents are handed over with complete maps. Outstanding points receive a contact person and a technically defined next task. If the design changes, compare the affected position with the documented scope before execution. Earlier reports remain in the file with their original scope of findings. Following clearance work, the clearance record with its scope, results and limitations supplements the documents for the property area actually addressed and site plan used.

Construction sequence

Coordinate investigation and construction sections

Arrange the file before the enquiry

Have existing documents ready in full and clearly identified. Add the current plans and a list of reports or appendices still missing. This makes clear which questions can be answered from the file. Further requirements are related to the actual gaps and new interventions.

After clarification, hand over a usable construction version

Site management receives current plans and the technical documents relevant to them. Earlier versions and outstanding tasks remain identifiable. Supplementary work is documented with its own scope. Later plan changes are reassessed against this traceable status before the affected works.

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. An older file is first checked to distinguish whether such analysis was merely recommended or documented with its results. The images used, their information value and area boundaries determine the historical findings. The absence of a visible indication is not a present-day subsurface measurement. For the new extension or connection, existing findings are related to the current intervention. Historical assessment can support method selection but confirms neither every later ground volume nor all future works.

Understand aerial photograph assessment

Magnetometric survey

Magnetic methods detect magnetic anomalies. If an earlier measurement is mentioned, its purpose and the area actually investigated are checked using the results documents. Suitability for today’s project depends on expected objects, ground conditions and the investigation volume needed. Fences, utilities and existing structures may influence assessment. A signal is not identified as explosive ordnance solely because of its strength. The current specialist task connects suitable measurement, assessment and necessary further clarification with the planned construction work.

Understand the scope of magnetometry

Electromagnetic methods

Electromagnetic investigations may suit certain metallic target objects and site conditions. Mentioning the method in an older plan does not in itself establish that measurement took place. For a new investigation, accessible areas, interfering installations and the findings required are considered. Instrument availability does not replace technical justification. Results receive location references and information on actual investigation conditions. A necessary supplementary method follows from assessment and is related to the ground volume affected by today’s extension or connection.

Understand electromagnetic surveying

Ground-penetrating radar

Under suitable conditions, ground-penetrating radar can provide information about subsurface structures and reflections. If an older report on utilities or built structures is submitted, its purpose is checked before use as evidence concerning explosive ordnance. Ground conditions, moisture and installations affect assessability. A reflection is not automatically explosive ordnance; an unremarkable representation does not confirm any arbitrary depth. The commission describes the findings needed for current groundworks. Specialist interpretation and limitations are documented with the results and distinguished from the original investigation purpose.

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. For new foundations or a deeper connection, position, reference elevation, depth and necessary borehole arrangement are considered together with existing utilities. Provision of investigation access is prepared on technical grounds. Earlier planning guidance alone does not provide evidence of an investigation performed. A standard grid or blanket depth figure does not replace specific planning. Results apply to the areas actually addressed and the method used.

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. The specialist task connects investigation, assessment and communication of findings for the proposed groundworks. An older mention of supervision does not establish its actual sequence or scope of results. Merely watching excavation does not replace a necessary survey. Site management needs the relationship to working areas, timing of specialist works, new findings and questions still open. The documented work is connected with the current extension or connection.

Agree the approach during construction
Technical assessment

What can be derived from existing records?

Historical findings

A historical aerial photograph analysis provides findings from the sources assessed. Read the report with its spatial and methodological limitations. Such analysis and a technical field investigation serve different tasks; one must not appear in the document set as evidence of the other.

For spatial comparison, the earlier investigation boundaries are entered on the current site plan. Retained reference points and the map base used at that time are considered together. For changed cadastral parcels, actual spatial coverage remains decisive. Depths are read with their corresponding elevation reference. Clarify, for example, whether they are measured from a former ground surface or a prepared investigation level. Documented excavation or fill is considered with its respective date. Comparison documents show which areas could be identified clearly and where information remains missing.

For a new connection, show the utility route and proposed working volumes together. Identify additional excavations, structural connections or deeper sections. Comparison with an earlier report concerns these actual interventions and considers its investigation objective. For several construction sections, it remains clear which position has already been addressed and which is accessible only later.

Before commissioning, missing information is requested as specifically as possible from the issuer or previous project participant. Give the document title, date, property designation and appendices sought. An extract remains labelled as such until the complete version arrives. Further specialist planning distinguishes whether an appendix alone is missing, the spatial reference is unclear or the new work lies outside the original investigation scope. These different questions may lead to different next steps. The agreed work and its results are incorporated into the project file with the current plan version.

Present-day measurement conditions

If a survey is necessary, current conditions must be considered. Buildings, utilities or metal installations may affect measurements. A method used on a previously clear property is not suitable today merely because it was used then.

Justified investigation scope

The specialist task is derived from existing findings and new plans. The clearance plan describes the selected approach and its limitations. A supplementary investigation is not required indiscriminately for every older document; it is planned after checking the specific knowledge gaps.

Next steps

From existing documents to an agreed commission

01

Initial contact and document review

At first contact, describe the new project and decision needed. Existing planning explanations, official information and investigation reports are compiled with their maps and appendices. If historical information is missing, the necessary aerial photograph analysis is applied for through the responsible local authority. Where use or terrain information remains unresolved, supplementary records and images are researched and technically assessed. Findings are related to the actual intervention area.

02

Establish the method and further work

Current plans are compared with the documented spatial and technical coverage. This establishes the investigation question still to be answered. The suitable method depends on target objects, ground conditions, depth, interference and accessibility. Official requirements, permissible private tasks and necessary preparatory works are agreed with the responsible participants. The service agreement identifies the specific scope and results documents needed.

03

Perform and assess the investigation

The agreed survey or technically suitable supplementary supervision is carried out under the established conditions. Data and observations are technically assessed and related to the areas actually addressed. The assessment distinguishes usable results, anomalies and locations with limited assessability. Deviations from planned work remain traceable with their causes. Further steps follow the specific technical question still open.

04

Document and compare with subsequent works

Results are documented with their scope, plan version and limitations. Site management receives the complete documents for the proposed works. Before the next intervention, compare position, depth and construction method with the investigation area addressed. Additional areas or changed execution are related separately. Specialist works and official decisions still needed are agreed with those responsible before the affected groundworks.

Documentation

The report’s findings must match the planned work

Identify planning guidance, investigations performed and current assessment

A usable set of documents separates earlier guidance, investigations performed and the current technical assessment. This shows what could be retained and which question was addressed anew. Specific areas and interventions matter on site; a general label such as “property checked” leaves this relationship unresolved.

Project responsibilities

The BFR Kampfmittelräumung describe specialist work on federal properties and provide technical guidance outside their direct scope. In Gladbeck, local requirements and North Rhine-Westphalia’s responsibilities remain decisive. Investigations commissioned from FONTANA-EOD are documented with the actual area, depth and service scope addressed. Official decisions are made by the competent authorities.

Working approach

How FONTANA-EOD works

Document the agreed specialist service clearly

FONTANA-EOD clarifies the agreed technical question using the documents actually available for the project in Gladbeck. Investigations performed are distinguished from earlier recommendations or planning guidance. Accessible areas and results needed are agreed with today’s construction task before execution. If plans or site conditions change, the scope is reviewed before the affected works. The report records the work actually performed and its limitations. For the next participant, it remains traceable which findings cover the new intervention and which additions are still needed.

Discuss the investigation task

The task before the equipment

Method selection follows the findings missing for today’s ground volume. An earlier method mentioned is interpreted using its purpose at the time and documented results. Ground conditions, installations and the working area are considered for the new investigation. An available instrument or similar neighbouring construction site is insufficient as the sole selection basis. Specialist planning justifies which approach can actually address the outstanding question for the extension or connection.

Keep limitations visible

Inaccessible measurement areas and those with limited assessability are shown on the plan with their specific boundaries. Site management can relate the outstanding tasks to the current project and prepare suitable supplementary work. Findings for an earlier overall project are not silently extended to additional connection areas. Missing results documents remain identifiable as missing. This enables coordination of the information still to be obtained and the ground volume actually requiring investigation.

Clarify changes before intervening in the ground

If the extension moves or a service or sewer connection needs a different position or depth, compare the change with earlier results before the affected activity. Specialist planners receive the new version and clear deviation from the earlier version. Their response and necessary supplementary work are related to the changed area. The same property address or reuse of an older plan designation does not confirm an unchanged investigation task.

Hand over the report and plan together

Actual results reports are provided in full with their plan appendices for handover. Earlier official information and planning guidance retain their respective functions and processing statuses. A brief overview may point to the evidence and open issues important for the next intervention. It does not replace the documented investigation scope. If site management or contractors change, it remains clear which documents describe specialist work performed and which contain only a requirement from that time.

Understand the results

Use technical statements for the next decision

A recommendation does not establish subsequent execution

A plan may identify further investigations or other measures. Whether and to what extent they were performed follows from subsequent documents. Request missing results specifically. Merely continuing a construction project does not replace traceable documentation of the explosive ordnance task actually addressed.

Understand investigation reports and their limitations

Connect old and new location references traceably

Use the original appendices and current plan together. Changes of designation are explained without moving the earlier investigation boundary. Older findings can then be used for their substantiated area. Outstanding requirements for additional areas or depths are determined separately.

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
Four people in orange high-visibility vests in front of two excavators on a construction site.
Person with a yellow survey cart on a footpath in front of a hedge.
Questions from planning

Questions about older evidence and new groundworks

Is an explosive ordnance note in a development plan sufficient?

A note may identify further clarification or measures. It does not in itself establish that these were subsequently performed. Therefore seek the corresponding reports and appendices and compare their findings with today’s proposed intervention. Clarify investigation requirements well before planned groundworks so that applications, preparation and any further measures can be incorporated into the construction sequence.

Must every older investigation be repeated?

This cannot be inferred from its age alone. Check the investigated area, objective, documented limitations and new plans. Only then can it be established whether the documents suffice or supplementary technical steps are needed.

What does the Vehrenbergstraße explanation establish about my property?

The explanation mentioned is dated 1 March 2001 and concerns the planning area described there. It makes no finding about another property. Your project is governed by its own documents and current official requirements. Today’s application procedure runs through the Amt für öffentliche Ordnung and coordination with the state explosive ordnance disposal service at the Arnsberg district government.

Can a contaminated land report replace explosive ordnance evidence?

A contaminated land report answers different investigation questions. A document addressing pollutants or former uses does not yet establish an explosive ordnance investigation. Read the respective commission and results; missing evidence needs separate clarification. Selection of an explosive ordnance method follows the investigation objective, depth, ground conditions and interference. Measurement limitations and areas with limited assessability remain documented.

What should I do if I encounter a suspicious object?

Stop the affected works, do not touch or move the object, and keep your distance. Keep other people away and notify the police immediately on 110. Follow the emergency services’ instructions.

Which document establishes that an announced investigation was performed?

The corresponding technical report with its actual scope, results and appendices. A commission, invoice or planning recommendation alone does not describe that results scope. The sequence connects document review and necessary historical assessment with method selection, investigation or suitable supervision, assessment and documentation. Before subsequent works, the result is compared with current plans.

Which factors determine effort and costs?

Scope, method, depth, measurement conditions and accessibility determine the effort. Missing documents and supplementary investigations influence the steps needed. The service agreement describes the permissible specialist task and intended results documents. Preparatory works and cost allocation are agreed with the participants for the specific case.

Must investigation always be repeated because a report is old?

This is assessed using its findings, today’s plans and changed conditions. The date alone does not replace that technical comparison. Earlier and present-day area names are brought together with their respective site plans; the documented investigation boundary remains decisive.

Project enquiry

Prepare the first technical discussion

Provide complete records

Send planning explanations, official information and technical reports with their respective maps and appendices. Add the project address, cadastral parcel, former property designations, official conditions and existing investigation status. State which documents are still missing or available only as extracts. The sector overview explains typical interventions and the documents they require.

Identify new interventions

Compare today’s plans with the earlier areas and depths substantiated. Mark the construction area, route, borehole points, excavation and connections with their positions and intervention depths. State construction periods, access, project status and the decision needed for the next work step.

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.