Project pathway
The quickest route to the right decision.
Explosive ordnance surveys in Minden: prepare utility works
Even if utility renewal needs no building application, the ordnance question still needs clarification. The groundworks planned are decisive. FONTANA-EOD supports commissioned preparation in Minden: we compare utility plans, intended depths and existing findings so investigation needs can be agreed before construction.
Show all working areas on the site plan.
Contact the public order authority about the work.
Hand over results and conditions before work starts.
Assess the construction project
Start from the actual ground intervention
Work outside a building permitting procedure may also need ordnance clarification. For your Minden project, we consider the planned earthworks with their location, depth and existing documents. Coordination with the authorities and a permissible supplementary specialist service relate to this specific task.
Project site
Connect the site with the specific construction task
Involve Minden's public order authority and the Arnsberg ordnance disposal service
The town of Minden identifies the local public order authority as the contact and the Arnsberg explosive ordnance disposal service as specialist support. A statement is also obtained for certain work not requiring a building permit. For your project, the work and documents are assigned to this coordination; scope and further steps follow from the specific review. Minden is a town in the Minden-Lübbecke district, Detmold administrative district, in North Rhine-Westphalia. Identify the precise project address and work locations affected. For a project in another municipality, clarify local responsibility there separately. The site plan and description of groundworks are assigned to the respective enquiry.
Local context
Minden also identifies sewer renewal
Minden's application route for work without a building permit
The town of Minden expressly describes ordnance assessment for construction work not requiring a building permit too. It gives sewer rehabilitation and replacement as examples. For these, project developers should ask the public order authority for a statement. Clarify the route for your specific groundworks even if no building application is submitted.
Distinguish the utility centreline from the actual intervention area
For the enquiry, the town specifies the type of work, cadastral district, section and plot, and site and construction plans. Show where work is to take place. The description utility rehabilitation alone does not establish whether the route remains, new connections are added or other depths are needed.
The town of Minden documents in its retrospective on 28 March 1945 severe destruction in the town centre. Historical findings and later changes are considered with their spatial references for today's projects. A utility since renewed or an area rebuilt is assessed using the documents actually available. The outstanding investigation question for the planned groundworks follows from this. General town history must be distinguished from a specific specialist finding about a property.
Requirements
Clarify technical requirements and responsibilities within the project
Relate requirements to the specialist task
For the commissioned activities, the relevant technical requirements and questions of permits, competence certification and responsibility are clarified. The actual planned service scope is decisive. A general company designation does not replace checking that the tasks and interfaces are described appropriately for the specific project.
Link occupational safety to the construction sequence
The risk assessment, working areas and communication must fit the planned activities. Explosive ordnance specialist works are coordinated with the other construction works. Operational organisation, traffic safety and other technical checks retain their own responsible parties. Joint coordination brings the information together and assigns tasks and decisions to the respective competent participants.
Use technical findings correctly
A measurement anomaly first requires specialist assessment; its appearance alone does not identify it as explosive ordnance. If an object is genuinely suspected to be ordnance, the prescribed reporting procedures and the measures set by the responsible authorities apply. Investigation reports specify the work completed and its limitations, so that results are not extended to unexamined areas or later design changes.
Procedure at the site: Town of Minden: ordnance – assessment for groundworks · North Rhine-Westphalia KampfmittelVO: Section 3 in particular.
Planning and documentation: BFR KMR: principles of clearance planning · BFR KMR: geophysics · BFR KMR: documentation · North Rhine-Westphalia Ministry of the Interior: explosive legacy
The BFR KMR provide specialist guidance. Local requirements and responsibilities must also be clarified for the project.
The permit, qualifications and responsibilities for the specific activity are assessed under the Explosives Act and the First Ordinance to the Explosives Act. The risk assessment under Section 5 of the Occupational Safety and Health Act relates to the planned activities. The DGUV Information 201-027 addresses preventive investigation and clearance of conventional explosive ordnance and defines its scope. The references it explains to DGUV Regel 113-003 concern specific activities involving explosives; they are not applied indiscriminately to every construction investigation.
Private works are subject to the exceptions under the KampfmittelVO and the requirements of the official guidance. The exceptions concern, in particular, downhole detection as part of specialist foundation engineering and explosive ordnance clearance during construction under the conditions laid down by law. Private explosive ordnance clearance during construction requires that prior investigation using recognised explosive ordnance detection methods is not possible. A relevant factor is also the state explosive ordnance disposal service's assessment that there are no specific indications of ordnance contamination on the site concerned. All further spatial, technical and organisational requirements are clarified for the specific activity. The competent authorities decide on the official appointment.
Working together
Allocate tasks within the construction project
Client and operator
The client describes the project and provides the available project documents. The operator adds requirements relating to use, access and scheduling. The participants agree their respective tasks and decision-making responsibilities. A coordinating contact person brings the project information together. Before an appointment, it is recorded clearly which information is missing, who will obtain it and which decision the result is intended to support.
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 company carries out the agreed permissible investigation and documentation scope. Authority requirements and decisions are clarified with the respective competent bodies. The documents needed for a specific procedure depend on the site and project. The technical report documents the specialist service performed, including areas, depths and limits of its conclusions. Its applicability to further groundworks is checked against the specific intervention.
The local public order authority of the town of Minden is responsible for hazard response and receives enquiries about planned groundworks. The municipal procedure identifies the state explosive ordnance disposal service at the Arnsberg District Government as specialist support. The responsible authorities clarify necessary official analysis, measures and preparation. A permissible private specialist service is agreed with the specific commission needed and its prerequisites.
Investigation task
Which specialist task comes next?
Derive the investigation task from area and depth
The scope required follows the specific work and existing knowledge. A short route is not automatically treated as a shallow task. Different depths at shafts and connection points remain identifiable. Further planning considers official information and actual work area conditions.
Assess historical documentsAssess methods under local conditions
Utilities, paved surfaces and installations may affect achievable findings. Describe these conditions before an agreement. Selection follows the question to answer rather than an available machine alone. For private activities in North Rhine-Westphalia, the respective legal prerequisites are also checked.
Compare investigation methodsProject types
Describe small utility schemes completely
Include connections and their working areas
A short utility may require ground interventions beyond the trench itself. Also show connection points, shafts and their planned excavations. A utility length figure does not replace these areas. Specialist assessment needs the full planned intervention with its different depths and boundaries.
Identify the applicable ground surface from which depths are measured. Connection to an existing shaft may involve different elevations from the rest of the route. Include necessary lateral working areas on the site plan too. If part of the work becomes accessible only later, identify that area with its planned scope. Specialists can then assess for each work location what findings already exist and what investigation commission is needed.
Specialist services and investigation tasks
Distinguish renewal from a new route
Compare the existing route with the planned construction. Mark relocations, additional connections or changed depths on the plan. The term renewal does not adequately describe these differences. Earlier results are used only for the area their documented findings actually cover.
An as-built drawing shows the existing installation; the construction plan describes the work now intended. Identify the versions used and record which part of the existing installation is to remain in use. Replacement construction may require different working areas or deeper connections. These changes are compared with existing results. The response explains which documents apply to the new task and which areas still need supplementary consideration.
Document findings and their limitationsInclude preparatory ground interventions in planning
Necessary exploratory openings or other work preceding the actual utility construction belong in the project description. Identify their purpose and location. Ordnance clarification is considered before each affected ground intervention. Preparation that itself changes the ground is not excluded from consideration merely because it comes earlier.
Describe necessary trial pits, geotechnical exploratory openings or early connections with location and depth accordingly. For this work, necessary investigations and protective measures are clarified before ground intervention. A later investigation of the main route does not automatically cover earlier work locations elsewhere. Preparation traceably records which step is due first and what prerequisite is still needed for it. The contractor receives information relating to that step.
Coordinate the sequence and tasksPreparation
Prepare the scope and commission together
Historical preliminary assessment, technical investigation and specialist work during construction answer different project questions. The permissible private activity under the specific North Rhine-Westphalia procedure is clarified with the information objective and necessary authority involvement before an agreement.
Establish what needs to be known before commissioning the work
For utility renewal in Minden, describe the commission through the planned groundworks. Even without a building application, compile the existing official statement and outstanding questions. Identify the utility route, shafts and connections affected and planned depths. This distinguishes whether existing documents first need assessment, a particular work area needs investigation or already assessed findings need further work. Agreed specialist work and result documents refer to this specific task. The term utility rehabilitation alone does not determine investigation scope.
Define the specialist taskCoordinate preparatory work with the investigation
Before fieldwork, clarify accessible survey areas along the planned utility and utility information available. Shafts, installations and other trades' work are included in coordination with their actual conditions. Necessary preparation depends on the chosen method and area affected. Additional breaking out or surface changes to create survey access are prepared with specialist input and the responsible parties. Such ground interventions are not undertaken independently as incidental survey preparation. Outstanding prerequisites are identified before the date.
Clarify preparatory work in the programmeAgree a clear scope and schedule
The scope of private specialist work is agreed using the project documents, actual execution conditions and permissible activity. Necessary preparatory works, investigation, evaluation and documentation are described transparently. Costs and dates are related to these prerequisites and the required coordination. Changes to the construction plans are checked against the agreed contract before work is extended.
Discuss the scope and scheduleTasks at the site
Describe utility routes, excavations and construction method
01
Planned utility route
Draw the planned utility route and mark differences from existing installations. Also check new connection points: they may lie outside an earlier investigated area. Use the current construction plan rather than an older as-built drawing without review.
02
Shaft excavations and connections
Include all work locations belonging to the scheme. A shaft excavation may be deeper or occupy more area than the adjoining trench. Show these differences on the plan so the investigation can be prepared for each affected area.
03
Construction method and working areas needed
Describe where and how the ground will be affected. A changed construction method may require additional ancillary or connection areas. Check these too; a method's name does not evidence an ordnance investigation already performed.
04
Contacts for preparation
Define who collects official responses and communicates plan changes. Even for a small individual commission, this task must be assigned. An agreed construction date does not establish that specialist preparation is complete.
Project documents
Documents that establish the next step
Check existing documents against the current design
An older statement or investigation report is needed with all associated annexes. Compare the original boundaries with today's planned work. A shared address is not sufficient for this assignment. Missing depths or unclear plan versions are included as outstanding questions in further coordination.
Also consider the ground surface at the time and later fill or soil removal. The existing depth of a utility and the depth coverage of an earlier investigation are different details. For unclear references, identify the specific question for the issuer with the work location affected. A necessary addition is planned from the current ground intervention. The project file brings older and new documents together so the respective findings and unresolved volumes of ground remain traceable.
Provide results for the contractor
Site management receives the applicable documents with the current plan. Location, evidential scope and limitations remain directly assignable. A summary note in the programme does not replace this documentation. If a connection or excavation changes, check whether the existing finding still covers the change.
For separately commissioned utility sections, each handover relates to its associated area addressed. Identify which plans and official responses are needed for the next section. If the construction method changes after investigation, show additional launch, reception or connection pits as separate working areas. Further planning compares these areas with existing findings. Necessary additional specialist services are agreed within their permissible scope and with execution prerequisites. After clearance work, the clearance record with its scope, results and remaining limits is assigned to the sections and pits actually treated on the associated site plan.
Construction sequence
Coordinate investigation and construction sections
Define a shared plan version before the enquiry
Compile the utility route, connection points, working areas and depths in clearly identified plans. Add existing information and the work description. The public order authority, designers and specialist contractor can then use the same spatial reference. Unresolved areas remain visible and are coordinated before the affected work.
Pass on changes during preparation
If a utility is relocated or an excavation enlarged, update the applicable plan. Explicitly identify differences from the previous version. Further assessment addresses these changes and existing findings. An earlier agreed date does not remove the need for specialist assessment of an additional ground intervention.
Method selection
Select methods according to the task and survey conditions
Historical records and aerial photographs
Historical aerial photograph analysis and other older documents help locate the basis for suspected ordnance. For utility renewal, assign the images and areas considered to the actual route with shafts and connections. Image availability and interpretability limit historical assessment. The absence of a visible indication does not confirm a technically investigated trench bottom. The analysis is linked to the planned earthworks and further findings. If a new section is planned instead of an existing route, its spatial reference is checked too. The historical image remains distinct from a present-day subsurface measurement.
Understand aerial photograph assessmentMagnetometric survey
Magnetic methods detect magnetic anomalies. For utility works, existing pipes, installations and adjacent structures may affect interpretation. Suitability is therefore assessed for the trench, shaft or connection area needed according to expected objects and ground conditions. Survey access and the volume that can be investigated are linked to this question. Signal strength alone does not identify explosive ordnance. The specialist commission describes how investigation, assessment and any further clarification relate to each other. The later report shows the finding for each utility section with its limits.
Understand the scope of magnetometryElectromagnetic methods
Electromagnetic investigations may suit certain metallic targets and site conditions. For an existing utility route, accessible survey areas and interfering installations are assigned to the specific investigation task. The finding required relates to the planned earthworks, rather than only the utility centreline on an overview plan. Instrument availability does not itself establish a suitable method choice. Locations and investigation conditions are documented with the results. A necessary addition follows from specialist assessment and is assigned to the connection, shaft or trench area affected.
Understand electromagnetic surveyingGround-penetrating radar
Under suitable conditions, ground-penetrating radar can provide information about subsurface structures and reflections. An earlier utility location report is checked for its purpose and areas actually covered before use for the ordnance question. Ground conditions, moisture and installations affect interpretability. A reflection does not identify explosive ordnance; an unremarkable image does not establish an arbitrary investigation depth. For the planned utility renewal, interpretation and limits are assigned to the intended ground intervention and documented with the commission.
GPR and limitationsDeep-ground and downhole surveys
For deeper ground interventions, it may be necessary to assess whether a surface investigation can establish what is needed or whether another approach is required. If a new shaft or connection needs greater depth than the rest of the utility section, describe that volume of ground separately. Position, reference elevation, borehole layout and known utilities inform preparation. Investigation access also needs suitable specialist planning. A general depth figure or standard grid does not replace task-specific assessment. Results apply to the areas actually addressed and the method performed.
Prepare deep interventionsSurvey during construction
If a necessary advance investigation cannot be completed in full, specialists assess whether a planned approach accompanying construction is suitable. For the intended utility work, it links investigation with interpretation and communication of findings in the construction sequence. Merely observing excavation does not replace a necessary survey. Site management needs assignment to the respective trench sections and work locations: when specialist work occurs, how new findings are communicated and which areas remain unresolved. A changed planned route is compared with the agreed approach.
Agree the approach during constructionTechnical assessment
Compare existing findings with utility renewal
Read earlier analysis with the site plan
A historical aerial photograph analysis is read with its annexes and original area boundary. Check whether it covers the planned utility section. A result for an earlier building foundation does not automatically apply to a connection outside that area.
If an older analysis concerns a larger planning area, assign its findings to today's route. Missing annexes or unclear boundaries are queried specifically. For historical findings still outstanding, clarify necessary processing with the responsible authority. Subsequent technical investigations receive their own commissions with areas, depths and information sought. A result from another section is checked against its documented scope before use for the next construction task.
Consider utilities and installations
The conditions for a survey must be compared with existing installations. Utilities and other installations may affect measurements. The method is selected according to the task and local conditions. A small construction site does not establish a blanket achievable investigation depth. Selection also considers intervention depth, ground structure, interfering objects and actual measurability. Where interpretability is restricted, a suitable addition or permissible supervision during construction is agreed with its own scope.
Record investigation scope in the commission
The clearance plan or investigation plan defines areas and the investigation objective. Even for a short utility, it must be clear which groundworks are to be investigated. Connection areas outside the commission are not included in the later report's coverage. The results documentation records the scope actually addressed.
Agree how investigated areas and their boundaries are to be shown in the report and associated plans. This also includes inaccessible locations and significant survey limitations. For work performed in sections, it remains clear which result belongs to which work area. Handover links the report with the applicable plans and official requirements. Work still needed is identified as specific outstanding tasks for further preparation.
Next steps
Coordinate ordnance assessment before construction
Mark working areas and depths
Compile utility sections, connections and intervention depths on one plan. Identify missing existing-condition information. Prepare the enquiry before groundworks begin so outstanding questions can still be clarified. Identify the project address and investigation question. Existing information and reports are checked for revision status, spatial relevance and gaps. Necessary research is undertaken for unresolved historical questions, and required official aerial photograph analysis is processed by the responsible state service. Results are assigned to the current ground intervention.
Request a statement from the public order authority
Minden describes processing through the public order authority and explosive ordnance disposal service at the Arnsberg District Government. Submit the work documents and agree the next steps. Allow for this clarification before construction and ask the responsible authority about processing time. The suitable method is agreed according to the information sought, intervention depth, ground structure, utilities and survey conditions. Permissible commissioning and execution prerequisites are clarified.
Commission the defined requirements
According to Minden's procedure, the local public order authority decides after the analysis on necessary measures and preparation. Pass the complete response to specialist planners. The subsequent commission must describe the defined task and its limits.
Perform the agreed investigation
The survey or investigation during construction appointed under North Rhine-Westphalia's requirements is carried out in the agreed areas and points. Measurement data and observations receive traceable location and elevation references. Uninvestigated areas, restricted access and relevant interference are recorded.
Assess survey data and findings
The collected data and findings are evaluated against the investigation objective. The technical assessment considers interference, the areas reached and remaining limits of the conclusions. It establishes which further investigation or work is needed for the planned groundworks.
Bring the report and plan appendices together
The report and plan attachments document the specialist works performed and their assessment. Worked areas, investigation depths, the relevant ground surface and limitations remain assigned. Reused older results and newly investigated areas are recorded distinctly. The agreed recipients receive the related documents together.
Check results before work starts
Compare the report and construction plan before the groundworks concerned. If the route changes or a connection point moves, check whether the result still fits. Site management needs the report with annexes and conditions.
Documentation
The report must identify the utility sections investigated
Findings and their scope
The report documents investigated areas, relevant depths, documents used and limitations. If only one utility section was addressed, it must be clearly identified. At handover, this must not become a finding for the entire utility or property.
Project responsibilities
The BFR Kampfmittelräumung provide specialist guidance; their direct scope concerns federal properties. North Rhine-Westphalia rules and local requirements remain decisive for Minden. FONTANA-EOD undertakes the agreed specialist tasks. The investigation report documents the specialist service performed. The responsible public order authority makes official decisions.
Working approach
How FONTANA-EOD works
Document the agreed specialist service clearly
FONTANA-EOD relates the agreed specialist task to the utility renewal described and applicable document status. Before work begins, agree accessible areas, outstanding prerequisites and results needed. If the route, depth or access changes, compare the commission with this before the affected work. The report shows which sections and work locations were actually addressed and where limitations apply. Site management can trace which basis fits the planned activity and which question still needs further clarification.
Discuss the investigation taskThe task before the equipment
Method selection starts with the outstanding question for the utility section concerned. A finding needed for a shaft area may have different prerequisites from surveying along an accessible route. Selection is justified for ground conditions, installations and actual working space. Neither an available instrument nor the approach on a neighbouring site is sufficient as the sole basis. The task and results needed are clearly described even for work without a building application.
Keep limitations visible
Inaccessible work locations and areas with restricted interpretability are identified with location and section labels. Site management can then identify outstanding tasks for shafts, connections or trench sections and agree a suitable addition. A total utility length statement is supplemented by these limits. The result remains assigned to the volume of ground actually investigated. In further planning, an investigated section is not implicitly transferred to an inaccessible connection.
Clarify changes before intervening in the ground
A changed utility route, greater intervention depth or different construction method is compared with existing results before the affected activity. The responsible specialist planners receive the changed plan version and a clear relationship to the previous construction plans. Their response and necessary additions are incorporated into the construction programme. An unchanged street label or continuing project name does not replace assessment of the changed volume of ground.
Hand over the report and plan together
Result documents link the report and associated plans to the utility sections actually addressed. A short overview can point to findings and unresolved areas important for the next activity. Their scope continues to be determined from complete evidence with locations, depths and limitations. When site management or contractors change, these related documents are passed on together. The next construction work then has the appropriate specialist basis for its specific work area, even where the project has no building permitting procedure.
Understand the results
Use technical statements for the next decision
A utility's length does not describe the entire ground intervention
Width, depth and additional work locations also matter for investigation. Record these separately from route length alone. A short connection may affect new areas compared with existing conditions. Define the specialist question from the full planned construction and its existing evidence.
Understand investigation reports and their limitationsOfficial information and an investigation report serve different purposes
Official assessment and an investigation actually performed are read according to their respective purpose. Scope, date and annexes belong together. A general statement about the work does not provide evidence that can be extended arbitrarily. Construction depends on the documented finding for the specific area affected.
Understand the service scopeDesign and findings
Documents for the next construction decision
Historical evidence and the current design
Aerial photograph interpretation is related to the actual groundworks. Its purpose and geographical scope remain distinct from a technical investigation of the ground as it is today.
Understand aerial photograph assessmentSpecialist reports for site management
The findings, their locations and limitations are handed over together. This makes clear to those carrying out the work which area has been investigated and which task remains outstanding.
Assess investigation reports
Further technical topics
Further technical information for your project
Determine the specialist service from the planned groundworks
Historical assessment, technical investigation and further work answer different questions. The enquiry describes the outstanding task, affected areas and depths, and the results required. The permissible scope of services is agreed in line with the actual conditions and responsibilities.
Compare servicesCoordinate the project sequence with everyone involved
Preparation connects the commission, site work and handover of findings. Changes to the project can then be incorporated into technical coordination in good time.
Process and documentationQuestions from planning
Questions about utility renewal and groundworks in Minden
Does the ordnance question need clarification even without a building application?
Minden also identifies construction work not requiring a building permit, such as sewer rehabilitation or replacement. Ask the public order authority about the procedure for your work. Whether further permits are needed is assessed separately.
What documents help for utility renewal?
Identify the property and work. Show the intended route, connection points and depths on the site plan, and include existing as-built documents. Mark new or changed working areas so they are considered during assessment.
Does an existing utility already establish investigation status?
No. An existing utility does not establish whether an ordnance investigation was undertaken or its scope. The associated reports are decisive. If these are missing, record the investigation status as unresolved.
How are official decisions and specialist services divided?
According to the municipal procedure, the local public order authority decides on necessary measures. The specialist contractor performs the agreed permissible services; official decision-making powers remain with the responsible authority.
What should I do if a suspicious object is found?
Stop work in the affected area. Do not touch or move the object, move away and keep other people away. Notify the police immediately on 110 and follow the authorities' instructions.
Do additional connection pits belong in the work description?
Yes. Alongside the utility route, show all planned ground interventions with their location and depth. Additional working areas are considered within their actual scope.
What is needed for a last-minute route change?
Pass on the change with a current plan and its effects on area and depth. Existing documents are checked against it before the affected work.
What determines effort and costs for a short utility?
Specialist assessment needs the actual ground interventions, local conditions and existing knowledge. Length alone does not describe investigation needs. Effort depends on usable previous documents, necessary preparation and access, individual areas or the number and depth of investigation points, the suitable method, survey conditions, interpretation and documentation. Specialist services still required are offered within their permissible scope for the specific outstanding task.
Project enquiry
Prepare your groundworks in Minden
Show all ground disturbance
Add connection points, excavations and their intended depths to the utility route. Provide property details, project address and type of work. Mark the ground interventions planned first and additional working areas on the current plan. Identify known existing utilities and access restrictions. For early exploratory openings or further ancillary work, describe their locations and planned depths. Necessary investigations and protective measures are also clarified for such preparatory groundworks.
Assign existing information
Send complete reports and plans with their dates, spatial references and identifiable limits. Record missing annexes and contacts for obtaining them. New or changed construction plans are compared with the previous version; differences are identified for specialist coordination. For an area clearance or recovery task, the necessary scope and permissible commission are clarified with the responsible authority. For the subsequent work step, pass on appropriate documents with the processing status actually achieved.
Technical investigation methods
Technical investigation methodsPreparation and project process
Preparation and project processAssign the region and project location
Assign the region and project locationUnderstand the construction task and project setting
Understand the construction task and project settingCoordinate the necessary recovery task
Coordinate the necessary recovery task
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.
