Project pathway
The quickest route to the right decision.
Explosive ordnance surveys for charging infrastructure and charging parks
For new charging infrastructure, we consider foundations, cable routes and the transformer station together with the planned ground works. FONTANA-EOD plans suitable surveys according to the charging layout, ground intervention depth, existing infrastructure and traffic phase. Send site and cable plans, foundation points, depths, and construction and closure dates so that services and documentation can be defined before each ground intervention.
Identify parking spaces, transformers and cable alignments.
Record foundations, bollards and depths.
Coordinate traffic phases and documentation.
Before cable civil engineering, foundations and grid connection
Clarify survey requirements before charging park and cable construction
Before charging infrastructure is built, existing hazard indications and planned ground interventions are used to clarify which explosive ordnance surveys are required. Besides chargepoints and cable trenches, this includes transformer stations, canopies, protective bollards, drainage and traffic areas. The location, depth, construction method and volume of ground affected by each component are decisive.
Project references
Selected project examples
STAWAG charging station, Aachen, 52074 DE
The scope of work for “STAWAG charging station, Aachen, 52074 DE” included ordnance specialist supervision of groundworks.
Service period: 2026-02
Service areas:Ordnance specialist supervision of groundworks
View project details · Ordnance specialist supervision of groundworks · Project location: Aachen
Divide the charging project by construction tasks
Plan chargepoints, the transformer station and cable routes separately
A charging project consists of chargepoints, the grid connection, cable distribution, a transformer station, protection areas and traffic areas. The individual components involve different ground intervention depths and construction phases.
The explosive ordnance survey follows the current civil engineering and electrical design. Parking areas, cable corridors, individual foundations and temporary construction areas each receive clear location and depth references.
On existing car parks, traffic, accessibility, utilities and paved surfaces are incorporated into work planning. Inaccessible areas or areas affected by technical installations are identified for a suitable construction stage or an alternative service.
Larger charging hubs may involve several transformer stations, power cabinets, buffer storage systems and separate charging areas built at the same time. Explosive ordnance planning follows this division so that the status of a completed area is not extended without assessment to later expansion stages or neighbouring traffic areas.
AC and HPC chargepoints
Charging columns, dispensers and rapid charging units require foundations, ducts, cable entries and often protective bollards.
Each point is recorded with its location, foundation dimensions, excavation depth and cable connection; relocated chargepoints are checked against the existing status of work.
Coordinate survey requirements for charging areas
Transformer station and grid distribution
Transformer stations, medium-voltage installations and distribution cabinets have their own foundation and cable areas.
Deep foundations, station excavations and interfaces with the grid connection are described and documented as separate volumes of ground affected.
Prepare the transformer and station areaCable trenches and duct systems
Cable alignments connect chargepoints, sub-distribution systems, the transformer station and the grid connection. Width, depth, crossings and joint bay areas determine the assessment geometry.
Existing utilities, drainage, lighting and traffic control are considered in method selection and section definition.
Select methods for trenches and ductsCanopies, carports and protective structures
Charging canopies, PV carports, equipment roofs and impact protection may require numerous individual foundations or piles.
Foundations are not assumed to be covered by a general car park assessment; they are considered separately with coordinates, target depth and construction method.
Assess carport and bollard locations
Traffic areas and drainage
New driving aisles, parking spaces, channels, chambers and infiltration or retention systems may involve area-wide and linear earthworks.
The assessment area follows the actual civil engineering cross-section and takes account of modification, expansion and subsequent surface construction.
Assess traffic and drainage areasDepot and works yard modifications
Bus, lorry and fleet depots are often electrified in sections while operations continue. Vehicles, buildings, utilities and existing foundations affect accessibility and survey feasibility.
The construction phase plan records when each area can be surveyed and which areas operations still need.
Prepare the depot modification assessmentSite, grid connection and civil engineering
Prepare surveys for site selection, procurement and construction phases
Charging infrastructure often develops from initial site sketches to a detailed electrical and civil engineering layout. The number of chargepoints, power rating, transformer concept, cable routing and traffic management may change several times.
Before each survey, the applicable design revision and affected construction sections are agreed. This keeps clear which areas have already been assessed and where a new layout involves additional ground interventions.
Site and feasibility assessment
Before land use or site modifications, historical sources, previous uses, known find reports and the planned grid connection are compared spatially.
The early assessment supports site comparison, budgeting and scheduling. It clarifies further survey requirements; necessary technical surveys relate to the ground interventions defined later.
Assess the charging site using historical evidenceCivil engineering and electrical design
Chargepoints, the transformer station, distribution equipment, cable routes, carports and drainage are overlaid with the suspected hazard area.
The plan records which areas, cable sections and foundation points are to be surveyed.
Derive the assessment scope from the charging layoutProcurement and expansion phases
The specification, construction sections, traffic phases, point lists, trench depths and documentation must be clear to civil engineering and electrical trades.
Later chargepoints or reserve areas are recorded as a separate expansion phase.
Structure procurement and construction phasesDeep foundations and piles
Carports, masts, transformer stations, bollards or special foundations may require deep individual ground interventions.
Coordinates, target depth, diameter and installation method are coordinated with survey planning before construction.
Assess deep individual foundationsModifications while traffic continues
Car parks, depots and service areas cannot always be closed completely. Surveys and civil engineering work are divided into accessible areas and defined time windows.
Inaccessible zones remain visible on the plan. Suitable supplementary methods and later survey dates are assessed for them.
Determine suitable surveys for the construction stageAnomaly in a cable or foundation area
Survey anomalies are checked against existing utilities, foundations and surface construction.
Depending on the findings, supplementary surveys, point-specific assessment, controlled exposure or involvement of the responsible authorities may follow.
Record anomalies and follow-up decisionsSuspected hazards, civil engineering and documented status
Check hazard indications and survey conditions for each charging area
Historical indications, technical survey feasibility and the detailed project geometry are assessed separately. This information is brought together on the current charging and civil engineering plan to select surveys.
A new charging park on open land may offer good survey conditions; an existing car park with utilities, reinforcement and vehicle movements requires a more differentiated methodology.
Car park or depot area with historical indications
Aerial photographs, previous uses or existing project information substantiate a suspicion in parts of the site.
The suspected hazard area is overlaid with charging areas, the transformer station, cable routes and construction areas.
The result is a technical assessment commission for the ground interventions actually planned.
Define the suspected hazard area at the charging siteOpen new-build area for a charging park
An accessible area without dominant technical interference can be surveyed over its extent.
Methods and survey grids depend on cable trenches, foundations, surface construction and the required depth of usable data.
Wherever possible, the work takes place before charging and grid equipment is installed.
Plan an area-based assessment of the charging parkExisting car park with dense utilities
Lighting, drainage, utilities, foundations and reinforcement can obscure survey data.
The site is divided into areas where data can be evaluated, deep intervention points and sections accessible only during civil engineering work.
Survey limitations are shown spatially and are not treated as areas without anomalies.
Select methods for car parks affected by technical installationsIndividual foundations for columns, bollards and carports
Each point has its own location, foundation depth and construction method.
For deep piles and boreholes, we assess which method can cover the planned volume of ground down to the required depth.
The result applies only to the documented points and cannot be transferred to relocated positions.
Assess foundation points and target depthsCable trench under continuing use
The cable corridor may pass through several traffic arrangements and operational phases.
Accessible sections are assessed in advance. Suitable supplementary methods and later survey access are assessed for closed zones or zones affected by technical interference.
Chainage and construction section references are retained through to the final report.
Coordinate surveys with access and the construction sequenceAnomaly at a foundation or route location
An anomaly is checked against the site plan, known installations, survey quality and planned ground intervention depth.
Survey anomalies undergo technical follow-up investigation or exposure. Recovery of confirmed explosive ordnance is coordinated with the permitted scope of work and local responsibilities. Necessary design changes are related to the affected chargepoint or cable section.
The finding and decision are assigned to the specific chargepoint or cable section.
Document findings and further measuresProject records by charging area and civil engineering section
Assign results to chargepoints, cable routes and construction sections
The project documentation links the charging layout, cable routing, foundations, transformer station, traffic phases and fieldwork. Chargepoints, utility sections and construction sections use consistent identifiers.
In addition to results, the documentation describes inaccessible zones, known technical interference and the follow-up measure defined for each. This facilitates later expansion phases and layout changes.
The chain of documentation is also linked to the construction programme. This makes clear whether a cable section, transformer area or chargepoint foundation must be addressed before the next closure and which data are still missing.
Site and chargepoint references
The address, land parcel, coordinate system, parking layout, chargepoint numbers, transformer station and work boundaries form the spatial basis.
Carports, bollards, distribution cabinets, chambers and reserve areas receive unique asset identifiers.
Basis for suspicion and existing conditions
Historical assessments, previous uses, existing asset plans, known find reports and project requirements are documented with their scope.
Unidentified utilities or conflicting design revisions remain identifiable as outstanding tasks.
Survey and site conditions
Methods, grid, assessment depth, point geometry, surface build-up, ground conditions, access, traffic and interference sources are described for each construction section.
Vehicles, reinforcement, lighting, utilities and technical installations are recorded as factors affecting data evaluation.
Data, anomalies and findings
Survey data, anomaly lists, point-specific documentation, site plans and field records use the same chargepoint or section identifiers.
This allows every further assessment or exposure to be assigned to the original volume of ground affected.
Areas not addressed and changed areas
Traffic, lack of access, technical interference or design changes may exclude individual zones from the planned survey.
These areas are mapped. Suitable supplementary methods and the possible survey date are assessed separately.
Final report and expansion updates
The final report identifies the areas, linear sections and volume at depth actually surveyed, together with remaining limitations.
Additional chargepoints, new cable routes or changed transformer locations are checked against this status before construction.
Charging layout, civil engineering and project communication
Check survey results against changes to the charging layout
The documentation dossier brings together historical baseline data, technical surveys, point-specific documentation and services during construction. Each result remains assigned to a chargepoint, cable section or installation area.
For phased expansion, it is clear which areas have already been addressed, which become accessible only after closure and which new components trigger supplementary assessment.
Charging and civil engineering layout
Parking spaces, charging columns, the transformer station, distribution equipment, cable routes, carports, drainage and traffic areas are recorded with unique identifiers.
The design revision is documented with its date and change index.
Historical site assessment
Previous uses, aerial photographs, authority documents and known find information are related to the present car park or depot area.
The plan identifies where hazard indications exist and which areas have no known corresponding indications.
Survey, line and point data
Area surveys, cable sections, foundation points, assessment depths and field conditions are stored with georeferencing.
The data structure allows comparison with electrical design, civil engineering plans and the expansion phase.
Anomaly and action register
Survey anomalies, technical installations, exposures and actual finds are assigned a status that can be updated.
Outstanding points are recorded with responsibility and reference to the next civil engineering or installation section.
Project and operator communication
Site owners, operators, network designers, civil engineering contractors, electrical contractors, HSE and responsible authorities receive coordinated documents.
Handovers identify the design revision, closure areas, outstanding zones and agreed follow-up measures.
Operational and expansion records
Reports, site plans, point lists and records are brought together for construction, acceptance and later extensions. After actual exposure or clearance work, the corresponding findings and clearance records are included.
The documents support additional chargepoints without applying existing results to new areas or depths without assessment.
From site assessment to commissioning
From the charging layout to handover for civil engineering and electrical works
The current charging, electrical and civil engineering designs determine which questions can already be assessed. Early assessment of suspected hazards provides orientation; specific foundation and cable tasks require detailed construction designs.
For operational car parks or depots, closures, access and construction phases are coordinated with fieldwork in good time. This keeps operations and work status spatially clear.
For construction sections at operational sites, it is defined which parking spaces, driving aisles and access roads must be available at which times. Fieldwork is linked to closure and civil engineering windows without reducing the necessary data density or spatial documentation.
Record the site and use model
The car park, charging park, depot, service area or commercial site is described together with the operator, expansion objective and decision required.
The project status shows which areas can already be planned in detail.
Review documents and site history
Site plans, previous uses, historical assessments, utility plans, earlier reports and known find reports are compared spatially.
This identifies priority charging and civil engineering areas.
Define chargepoints and ground intervention geometries
Foundations, bollards, carports, the transformer station, cable trenches, chambers and drainage are recorded with location, depth and construction method.
The geometry forms the basis for setting out and tendering.
Determine methodology and construction phase
The surface, ground conditions, existing utilities, traffic, interference sources and required depth of usable data determine the suitable specialist service.
Inaccessible sections are assigned to a later closure or construction stage.
Organise access and traffic management
Closure areas, diversions, work windows, site preparation, setting out and communication channels are coordinated before mobilisation. Necessary surveys and protective measures are planned before ground intervention during surface opening, dismantling or the creation of access.
The deployment plan takes account of operations, delivery traffic and concurrent trades.
Carry out surveys and supervise civil engineering
Area surveys, point assessments or excavation supervision are carried out using chargepoint and section identifiers.
Departures and inaccessible zones are documented during fieldwork.
Assess data and follow-up measures
Readings and anomalies are checked against existing utilities and planned ground interventions.
For outstanding areas, the supplementary survey, exposure or change to the construction sequence required is recorded.
Hand over results and update expansion plans
The report, maps, point lists, limitations and status of measures are prepared for the operator, civil engineering contractors and electrical designers.
Later charging areas are checked against the documented scope of work before construction.
Link chargepoints, cable alignments and traffic areas
Provide chargepoint and cable route locations and depths
The number of chargepoints reveals little about the volume of ground requiring explosive ordnance assessment. Foundation dimensions, cable routes, the transformer station, carport supports, drainage and possible ground level changes are decisive.
The site plan is divided into areas, lines and points. These geometries remain linked on the same project plan but are addressed differently according to depth, accessibility and survey feasibility.
For combined charging, storage and PV installations, shared construction areas and separate ground intervention geometries are both considered. A shared cable corridor can be surveyed together. Survey requirements for additional foundations or piles are assessed separately.
Record foundations, cable trenches and excavations on the site plan
Charging columns and protective bollards involve numerous individual foundations. Cable and duct systems form linear ground interventions connecting parking spaces and the transformer station. Carports, transformers and equipment cabinets need additional foundations; drainage and traffic areas may involve area-wide earthworks.
For each area, the top and bottom levels, working width, foundation size, installation method and possible positional deviations are described. For piles or deep boreholes, the full volume of ground affected is considered, not just the centre point of the subsequent component.
On existing sites, reinforcement, utilities, lighting foundations, vehicles and earlier modifications affect survey data. The assessment plan therefore separates areas where data can be evaluated from zones affected by technical installations or accessible only after closure.
Charging columns and dispensers
The foundation, ducts and cable connection are documented for each chargepoint with location and depth.
Relocations during detailed design trigger a check against existing point-specific documentation.
Protective bollards and impact protection
Rows of bollards, crash protection and barriers can involve numerous individual ground interventions. Their embedment depths are recorded individually.
Whether an area survey is sufficient is assessed using point spacing, embedment depth, construction method, suspected hazards and survey conditions.
Transformer and distribution areas
The transformer station, medium-voltage equipment and sub-distribution systems receive their own foundations, excavations and cable interfaces.
The station area is recorded in a shared geometry with the grid connection and charging area.
Cable routes and crossings
Cable trenches are described with alignment, width, depth, joint bay areas and crossings.
Traffic phases and existing utilities are considered when defining sections and selecting methods.
Carports and canopies
Supports, piles and foundations for charging or PV carports are recorded as point or alignment geometries.
For deep ground interventions, we check whether existing results cover the planned volume of ground or supplementary surveys are required.
Traffic and drainage works
Driving aisles, parking surface construction, channels, chambers and infiltration areas may affect additional areas and depths.
The assessment area follows the actual civil engineering cross-section and planned construction phases.
Select an investigation
Select surveys according to the area and charging installation geometry
Take existing installations and continuing use into account
Charging parks are built on existing car parks, works yards, service areas, commercial sites or newly developed plots. Paved surfaces, existing utilities, reinforcement, previous modifications and continuing vehicle movements can affect technical surveys and require work in sections.
Select surveys according to existing installations and useRecord foundations and cable alignments on the charging layout
AC chargepoints, HPC installations, depot charging and combined PV or storage projects have different network and foundation geometries. The explosive ordnance assessment relates to cable alignments, station areas, foundation points and temporary civil engineering zones, rather than the number of chargepoints alone.
Determine methods for foundations and cable alignmentsSelect methods according to the construction task
Which specialist service addresses which part of the charging project
Historical assessment, geophysics, depth-specific assessment and excavation supervision have different limits. They are combined according to chargepoint, cable section, station area and traffic phase.
01
Historical aerial photograph analysis
Assesses previous uses and spatially defined suspected hazards on a car park, depot or new-build site.
It does not replace technical assessment of the current cable and foundation geometry.
02
Magnetometry
Can detect ferromagnetic target objects in open areas with little technical interference.
Vehicles, reinforcement, lighting, utilities and technical installations can limit data evaluation.
03
TDEM
Detects time-dependent electromagnetic responses from conductive objects and can supplement surveys of selected zones.
The effects of cables, the power supply and ground conditions are assessed before deployment.
04
Ground-penetrating radar / GPR
Can show structural differences, utilities and reflection zones beneath suitable paved surfaces.
Data evaluation requires comparison with existing asset plans and does not alone permit unequivocal explosive ordnance identification.
05
Deep-ground and downhole surveys
Can survey suitable deep foundation and drilling areas for carports, transformer stations, masts, bollards or special foundations.
Coordinates, target depth and the subsequent installation geometry must be consistent with the survey concept.
06
Excavation supervision
Where explosive ordnance detection during construction is technically suitable, each working layer is surveyed and evaluated using technical methods. Controlled removal in layers and supplementary visual inspection then follow; these steps are repeated down to the agreed excavation base.
Layers supervised, hold points, section boundaries, authority to issue instructions, communication channels and documentation are defined in the work instructions before work begins.
Chargepoints, cable routes and construction phases
Check the charging layout against survey results before each construction section
For surveys of chargepoint foundations and cable routes, it is clarified which neighbouring parking spaces will remain in use. Access, construction phases and survey dates are planned together. Assessment requirements are derived from the complete civil engineering plan.
Technical limitations and outstanding areas are identified before procurement and each construction phase. This allows operators, network designers and civil engineering contractors to define realistic closure and handover dates.
Record charging columns, the grid connection and ancillary areas together
FONTANA-EOD considers not only the charging column but also the transformer station, cable routing, protective bollards, carport foundations, drainage and traffic areas. Together these details determine the survey area.
Method selection takes account of whether the site is an open new-build area, an existing car park, a depot or a service area. Paved surfaces, reinforcement, utility density, vehicles and accessibility are recorded as actual survey conditions.
For phased expansion, charging areas already addressed and outstanding zones are clearly identified. One area can thus progress to civil engineering work without assuming the status of later expansion areas.
If chargepoint numbers, the transformer location or cable route change, the new plan is compared with the existing assessment geometry. Only areas fully covered can rely on the existing documentation.
The final report links planning, fieldwork and construction. Operators and project management can identify areas addressed, technical limitations encountered and measures still required before an outstanding ground intervention.
The handover between civil engineering and electrical trades is particularly important. It identifies not only a completed work section but also outstanding marginal zones, reserve areas not yet surveyed and the design revision to which the documentation applies. Subsequent installation therefore remains linked to a clear area and depth status.
Record all planned ground interventions
Chargepoints, the transformer station, cables, bollards, carports and drainage are recorded together.
Match methods to survey conditions
New-build sites, car parks, depots and service areas are addressed according to their actual survey environments.
Plan access for each construction section
Closure areas and work windows are linked to the fieldwork required.
Record foundation points with their depth
Foundations, piles and boreholes receive clear coordinate and depth references.
Check plan changes
New charging areas and changed cable routes are checked against the existing status of work.
Hand over results for construction and operations
Maps, point lists and reports support civil engineering, electrical trades, operators and later extensions.
Prepare the next construction section
Link surveys to phased charging park construction
Identify outstanding areas and later survey access
Using the charging layout, FONTANA-EOD describes the areas and depths to be surveyed and the documentation needed for each construction section. Suitable supplementary methods and later survey access are assessed for areas that cannot be evaluated adequately in advance.
Coordinate construction sections before earthworks and electrical work
The survey is linked to accessible parking areas, cable sections and station areas. For each construction section, the documents available and outstanding survey requirements are recorded. Traffic management and operational access are coordinated with site management.
Site owners, operators and construction
Who supplies documents, plans investigations and receives results
Site owners, chargepoint operators, grid operators, designers, civil engineering contractors, electrical contractors, specialist contractors and responsible authorities have different tasks. Before construction, it is defined who reports design changes, tracks outstanding areas and receives results.
Site and commission
Owner, local authority or fleet operator
Define site use, expansion objectives, traffic requirements, construction phases and required documents.
They provide existing asset and property data and commission the necessary specialist services.
Charging operations
Charge Point Operator and project developer
Define the chargepoint concept, power rating, operating model, expansion phases and availability requirements.
Design changes are checked against civil engineering and assessment geometry.
Grid connection
Grid operators and electrical designers
Define connection capacity, the transformer station, transfer point, medium-voltage equipment and cable routes.
The grid connection and charging area are coordinated as a connected construction task.
Construction execution
Civil engineering, electrical and installation contractors
Construct cable trenches, foundations, bollards, the transformer station and surfaces and carry out installation according to the agreed plan.
Departures from the planned location, depth or construction method are reported before construction.
Specialist service
FONTANA-EOD
Assesses suspected hazards, survey feasibility and ground intervention geometry, carries out the commissioned assessment and documents the result and limitations.
The work remains linked to chargepoint and section identifiers.
Competent authorities
KBD, KMBD, KRD and local authorities
In Germany, the ordnance disposal services of the federal states and the locally competent authorities carry out hazard-response and find-management duties. Their involvement is established for the project location; outside Germany, local responsibilities apply.
The local public order authority and, where applicable, building control are involved according to their project responsibilities. Conditions and contacts are assigned to the actual charging areas, station areas and construction sections; reporting procedures are defined before work begins.
If an unexpected suspicious object is found, notify the police immediately on 110 in Germany; outside Germany, the local emergency reporting procedure applies. The competent authorities determine the next steps.
Civil engineering, traffic and safe project organisation
Technical foundations that work together in charging infrastructure construction
Requirements depend on the activity, project location, public or operational use and actual ground intervention. Explosive ordnance assessment, traffic management, civil engineering safety and electrical safety are coordinated within a shared construction organisation.
The explosive ordnance assessment remains limited to the volume of ground surveyed. Requirements for electrical installations, charging operations and traffic safety are addressed by the respective designers and responsible parties.
Explosives law, risk assessment and construction sequence
In Germany, § 7 SprengG concerns the commercial authorisation for activities requiring authorisation; § 20 SprengG concerns the certificate of competence of responsible persons. Under § 1b SprengG, searching for found munitions also counts as handling them. The requirements applicable to the project depend on the activity actually commissioned and the allocation of responsibilities.
The risk assessment links excavation, drilling, traffic, heavy equipment, existing utilities, electrical work, exclusion zones, escape routes and communication with the explosive ordnance approach.
DGUV Information 201-027 supports risk assessment and protective measures for explosive ordnance clearance work. The Baufachliche Richtlinien Kampfmittelräumung contain requirements for historical and technical investigation, clearance concepts, procurement and documentation within their defined federal remit. Their application to the specific charging infrastructure project is clarified separately.
If an unexpected suspicious object is found, stop work in the affected area immediately. Do not touch, move or further expose the object. Leave the danger area and keep others away without putting yourself at risk. In Germany, notify the police immediately on 110; outside Germany, use the local emergency reporting procedure. The competent authorities determine the next steps. Then inform site management and those responsible for the project.
Opening areas to traffic, electrical commissioning, construction contract acceptance and decisions on finds are separate processes. The project sequence assigns the necessary documents and responsibilities to each.
The First Ordinance to the Explosives Act (1. SprengV) includes requirements concerning specialist competence and state-recognised training courses. For charging infrastructure, the required qualification is determined by the specific survey or clearance commission.
DGUV Rule 113-003 concerns the dismantling or destruction of explosives or corresponding objects and also includes the disposal of found munitions. It applies according to this field of activity; it does not replace a risk assessment specific to the planned ground intervention.
Qualifications and scope of responsibility
The company and responsible individuals must match the specific survey, exposure, clearance or recovery service.
Traffic and work organisation
Closure areas, diversions, construction traffic, electrical installations and escape routes are coordinated for the project.
Procurement and quality requirements
Areas, lines, points, depths, methods, data formats and the basis for acceptance are clearly described.
Find reporting and communication route
Site owners, operators, site management, the specialist contractor and responsible authorities receive a procedure defined in advance.
Before civil engineering work and closures
The charging layout, cable alignments, individual foundations, traffic phases and necessary assessment services are coordinated.
Outstanding areas are incorporated into programme and construction phase planning.
During construction and installation
Work areas, hold points, design changes and handovers must be clear to civil engineering and electrical trades.
Zones not addressed remain visible on the construction plan.
If suspected ordnance is found
Stop work immediately, do not touch, move or further expose the object, leave the immediate area and keep others away without putting yourself at risk. In Germany, notify the police immediately on 110; outside Germany, the local emergency reporting procedure applies.
Then inform site management and those responsible for the project. Work resumes in accordance with the instructions of the responsible authorities.
From the charging layout to project records
Documents used in practice for charging infrastructure projects
Project documents link parking and charging layouts, cable routing, foundation points, the transformer station, traffic phases and fieldwork. All data use the same chargepoint and section identifiers.
Historical assessment, deep-ground surveys, excavation supervision, investigation of findings and the final report remain identifiable as separate specialist services and are brought together for the specific charging area.
Project area and ground intervention geometry
Chargepoints, cable routes, individual foundations and temporary volumes of ground affected are shown on the same civil engineering plan.
Assess charging infrastructure within the energy project
Historical basis for suspicion
Suspected hazard areas, data gaps and previous uses are related to the planned ground intervention on the site plan.
Check the historical basis for the siteDepth-specific point documentation
The documentation records coordinates, survey depth, survey conditions, interference and outstanding tasks.
Survey charging and carport foundations
Excavation and field record
Field records document the work area, construction conditions, surveys, interruptions, observations and reporting procedures.
Supervise cable and station excavation
Findings and handover documentation
The project records document exposure, assessment, responsibility and further measures with location, date and work status.
Maintain findings and handover status in the project recordsProject file and completion report
The final report contains the initial situation, methods, data, findings, survey limitations and outstanding tasks.
Document civil engineering records and handover
Relevant further information
Specialist services for chargepoints, cable routes and grid connections
Historical hazard assessment, point and deep-ground surveys, excavation supervision, investigation of findings and documentation cover different parts of charging infrastructure.
Selection depends on the current charging layout, the next civil engineering section and the assessment needed before procurement, closure or installation.
Sectors and applications
Plan ordnance assessments for transport, utility, energy and other infrastructure projects according to their ground interventions.
Have the project surroundings assessed by specialistsUtility and energy projects
Distinguish utility corridors, crossings, foundations and installation areas by construction method and intervention depth.
Assess the energy project in its overall contextHistorical aerial photograph analysis
Evaluate historical indications and data gaps at the planned charging site.
Determine the historical suspected hazardDeep-ground and downhole surveys
Prepare surveys for deep foundations, masts, piles, shoring and borehole locations.
Assess deep interventionsExcavation supervision
Establish the suitability and sequence of construction-phase ordnance surveying for remaining excavation areas.
Plan excavation supervision within the construction sequence
Ordnance recovery
Coordinate recovery of confirmed ordnance with the permitted activities and local responsibilities.
Clarify the findings and recovery processProcess and documentation
Prepare the specification, data formats and section handovers for charging park construction.
Prepare tendering and documentation
Regions and responsibilities
Clarify the project location and local responsibilities for planning, conditions and communication about finds.
Clarify regional responsibilitiesProject enquiry
Submit the charging layout, ground intervention depths and construction schedule for a project assessment.
Submit project recordsIdentify the project location
Locate charging areas and the grid connection
Identify the site and applicable requirements
State the project location, property and identifiers of charging areas, the transformer station and connection sections. The site plan shows cable routes, foundation points and temporary civil engineering areas. Existing requirements are assigned to the relevant construction section.
Use results correctly
Compare changed charging layouts with existing results
Assess additional chargepoints by more than their number
New chargepoints may require additional foundations, cable crossings or station areas. Compare the changed work geometry with the surveyed volume and clarify additional areas and depths before construction.
Check evidence against the interventionKeep canopies and ancillary installations on the plan
Foundations for canopies, bollards or drainage installations may differ from cable trenches. Keep these ground interventions visible on the current site plan so that they are considered during surveys and handover of results.
Explore the technical principlesTechnical information
Utility and energy projects: brochure
Utility routes, substations and energy installations place different demands on ordnance assessment. The brochure shows the design information needed and how investigation, construction sequence and documentation fit together.
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Common project questions
What should be clarified before cable civil engineering, foundations and charging park construction
Site use, cable alignments, individual foundations, traffic phases and actual survey feasibility remain decisive for the survey.
When should charging infrastructure be assessed for explosive ordnance?
The assessment should begin as soon as the site, charging area, transformer station and main cable routes are known. Before ground investigation, foundations, cable trenches, carport piles and drainage, the affected volumes of ground must be defined by location and depth.
Is assessing the cable route sufficient for the entire charging park?
No. Charging columns, protective bollards, transformer stations, distribution cabinets, carports, chambers and traffic areas have their own point, linear or area geometries. Each relevant ground intervention is recorded separately and then brought together in the project records.
How is an existing car park with utilities and reinforcement surveyed?
Existing utilities, foundations, reinforcement, vehicles and paved surfaces are recorded as technical constraints. Suitable methods and survey dates are assessed for areas where data can be evaluated, deep intervention points and zones accessible only after closure or dismantling. Necessary surveys and protective measures are planned before preparatory ground intervention during surface opening or dismantling.
When are deep-ground surveys required at chargepoints?
Carport piles, transformer station foundations, deep bollard or mast foundations and boreholes may extend beyond the near-surface area covered by surveys. We then assess which method can cover the planned volume of ground down to the required depth. Ground conditions, technical interference and construction methods are considered when selecting the method.
Can surveying take place while a car park or depot remains operational?
This is possible in sections if closure areas, access, vehicles, utilities and safe work areas are coordinated. Inaccessible zones are scheduled for a later traffic arrangement or construction stage and identified on the plan as outstanding.
What does reliable documentation for charging infrastructure contain?
The documentation brings together the design revision, chargepoint and section references, methods, survey conditions, point and line data, anomalies, zones not addressed, findings and the technical follow-up decision.
What determines effort and cost?
Relevant factors are the number and depth of chargepoint and carport foundations, cable trench length and width, transformer station, traffic phases, surface build-up, existing utilities, survey interference, methods, data formats and desired documentation.
What happens if a suspicious object is encountered during civil engineering work?
Stop work in the affected area immediately. Do not touch, move or continue to expose the object. Leave the danger area and keep others away without putting yourself at risk. In Germany, notify the police immediately on 110; outside Germany, use the local emergency reporting procedure. The responsible authorities determine the next steps. Then inform site management and those responsible for the project.
Documents for specialist assessment
Information required for chargepoints, cable routes and the transformer station
An initial enquiry can be based on a preliminary design. It should identify the site, chargepoint arrangement, transformer station, cable corridors, foundation types and the decision needed before tendering or civil engineering work.
For existing car parks and depots, existing utilities, previous modifications, operating hours and possible closure sections are particularly important. This allows assessment requirements to be realistically allocated to accessible construction phases.
Incomplete design revisions can also be submitted. They show which civil engineering or existing asset details are still missing for reliable costing.
For publicly accessible charging parks, it is also defined which construction sections can be addressed outside peak usage times and how the documented status is handed over for the respective opening to traffic.
Temporary chargepoints and temporary diversions are also recorded where their construction involves additional earthworks.
Site and charging layout
Send the address, land parcel, site plan, parking spaces, chargepoint numbers, transformer station, distribution equipment and possible expansion phases.
Mark existing areas, dismantling, carports and reserve areas.
The relevant design revision should be clearly identified.
Cables, foundations and depths
Describe cable routes, ducts, chambers, foundation types, bollards, carport supports, transformer foundations and drainage.
State maximum depths, working widths, drilling or piling methods and the planned sequence.
Point and line lists make precise referencing easier.
Existing installations, traffic and preliminary documents
Include utility and existing asset plans, historical assessments, previous surveys, ground investigation and historical records, and known find information. Information and conditions from authorities are included with their date, complete attachments and spatial scope.
State traffic phases, closure periods, access, concurrent trades and the intended commissioning date.
Describe the desired documentation objective for planning, procurement, site management or the operator's records.
For initial specialist assessment
For an initial assessment, a site plan, charging and civil engineering concept, transformer station, cable routes, maximum ground intervention depths, traffic phases and existing hazard information are often sufficient.
FONTANA-EOD checks your documents to identify which surveys are required and what information is missing. Charging areas ready for construction can be surveyed first; for later expansion phases, survey requirements are assessed once their areas and depths are defined.
Areas, point quantities, line lengths, depths, closure windows, technical interference sources and desired handover formats are then specified for costing.
For charging parks with several expansion phases, it should also be clear which spare utility capacity, ducts and future chargepoints are already being prepared during construction. This enabling work may require a different assessment from that suggested by the number of charging columns initially visible.
Charging areas and expansion phases
Chargepoints, parking spaces, transformer, carports, reserve areas and design revision.
Points and depths
Charging columns, bollards, supports, piles, boreholes and target depths.
Cables and traffic areas
Cable alignments, chambers, crossings, drainage, closure and operational phases.
Documentation objective
Basis for planning, procurement, civil engineering, electrical trades, the operator or project records.
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.
