Project pathway
The quickest route to the right decision.
Explosive ordnance surveys in Lünen: from planning to investigation
What has already been completed on the ordnance question, and which tasks remain before groundworks? FONTANA-EOD supports commissioned investigation planning and documentation in Lünen. We bring existing plans, official responses and investigation reports together for the specific task. These documents must also be passed on in full when project or site management changes.
Consider it during permit planning already.
Pass on responses with maps and annexes.
Identify completed work and outstanding tasks.
Assess the construction project
Clearly distinguish the application, response and investigation
A submitted application establishes a different processing status from an available investigation report. For your Lünen project, we bring the applicable documents together with their actual results. Outstanding tasks and plan changes are assigned so specialist planners and site management can continue on the same basis.
Project site
Connect the site with the specific construction task
Include Lünen's recommendation early in planning
The town of Lünen recommends submitting the aerial photograph analysis application to the local public order authority with the building application already. It identifies a site plan as a required document. For further project work, the application, response and subsequent processing are documented separately. Processing status and steps still needed are coordinated for the project when scheduling. Lünen is in the Unna district, Arnsberg administrative district, in North Rhine-Westphalia. Provide the specific project address. For projects in another municipality, clarify local responsibility there separately. Location details and the ground interventions actually planned form the basis for further assignment.
Local context
Lünen recommends enquiring with the building application already
Early application in Lünen's procedure
The town of Lünen offers an online service for aerial photograph analysis. It recommends submitting the application to the local public order authority together with the building application. It specifies a site plan at a scale of 1:5000. Include this step in permit planning; it does not establish a fixed processing time.
Pass on the actual processing status
For subsequent investigation, it must be clear what is actually available. Has only the application been sent, has the response arrived or has an on-site investigation already taken place? State this status precisely at handover and include the associated documents.
The town reported on 20 March 2025 about a Second World War unexploded bomb found during sewer works on Roonstraße. The find was handled with the responsible authorities involved. The event concerns the location and sequence documented at that time. For further projects, available historical findings are compared with today's work areas and intervening ground changes. The investigations needed are clarified according to the specific ground intervention and applicable requirements.
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.
In Lünen, ordnance hazard response remains the task of the local public order authority. State specialist support is provided by the explosive ordnance disposal service at the Arnsberg District Government, responsible for the Arnsberg, Detmold and Münster administrative districts.
Procedure at the site: Town of Lünen: aerial photograph analysis and ordnance assessment · 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 Lünen performs hazard response tasks and is the contact for official aerial photograph analysis. The state explosive ordnance disposal service at the Arnsberg District Government supports the responsible authorities. It handles state ordnance tasks in the Arnsberg, Detmold and Münster administrative districts. Necessary official decisions and permissible private commissioning are clarified for the specific project location and service scope.
Investigation task
Which specialist task comes next?
Identify the evidence still needed
Compare the specific construction decision with existing documents. A requested analysis, received recommendation and survey result serve different purposes. This determines the further work actually needed. Method selection starts with this outstanding specialist question and the planned ground interventions.
Assess historical documentsDefine the next commission clearly
Describe the area, applicable plan version and expected finding of the proposed service. Existing findings and their limits are considered. A general construction start date does not determine the investigation method. Before private activities, specific North Rhine-Westphalia prerequisites and necessary coordination with the authorities are also checked.
Compare investigation methodsProject types
Prepare project handovers with traceable documents
Understand what sending an enquiry establishes
Keep the submitted version with its date and associated site plan. It shows the area and task requested. Whether a response exists or an investigation has been performed is evidenced separately. A completed entry in a scheduling list should not conflate these different processing stages.
For questions, give the associated file reference where one has been assigned. Identify any later addition to the site plan with its date. If an excavation moves or a utility is added, clarify whether the original enquiry already includes these areas. The project file links every response to the version actually submitted. This establishes for the next commission which area has already received specialist attention and where information is still needed.
Coordinate the sequence and tasksPass on official responses in full
Annexes, maps and conditions belong with each letter. A single results sentence may be unclear or interpreted too widely without this context. Pass the complete document to the specialist planners involved. Missing annexes are requested specifically and remain identified as outstanding tasks until received.
A recommendation for further investigations includes the areas described and conditions for the work. Identify which are relevant to the next construction section. If an annex must be requested again, identify the missing document by reference to the letter. Further specialist planning can then build specifically on existing findings. A map prepared for another investigation purpose is labelled with that purpose and assessed accordingly.
Document findings and their limitationsIdentify who is responsible for outstanding tasks
A handover should identify who obtains missing information and organises the next coordination step. Record outstanding questions with the area affected. Organisational responsibility does not confer specialist or official decision-making powers. When a contact changes, the actual processing status is passed on in full.
For a split commission, also define which documents each contractor is to receive. Local coordination may concern access to the construction area first and handover of a result plan later, for example. Responses from these steps are documented with the section addressed. When tasks pass to a new contact, necessary questions to the authorities and outstanding specialist services remain specifically identified. Further scheduling considers the actual status of these prerequisites.
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 commissioning in Lünen, first clarify the existing processing status: is there only a submitted enquiry, an official response already, or an interpreted investigation report? Include the complete document with its map and annexes in each case. The outstanding question defines the next specialist task. This may involve assessing a recommendation, investigating an identified area or further work on an assessed finding. The commission identifies the current ground intervention by location and depth, and the result documents needed for it.
Define the specialist taskCoordinate preparatory work with the investigation
A response concerning further investigations is linked to actual work conditions. For the first section, describe accessible areas, existing utility information and coordination with other trades. Specialist planners check what access and survey conditions the selected method requires. If a prerequisite is missing, it is passed to the responsible person as an outstanding task. Preparatory breaking out or additional groundworks are agreed with specialists before execution. An agreed meeting or site visit alone does not evidence these prerequisites being in place.
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
Documents for handover
01
Submitted application with site plan
Pass on the submitted version with its associated site plan. Include later designs separately and identify the changes. This allows a check of the area requested and whether current plans still fit.
02
Response with all annexes
Forward official letters in full with annexes and conditions. An entry in a scheduling list is insufficient. Specialist planners need these documents to assess further investigation needs and ask targeted questions.
03
Commission for the next investigation
Describe the commissioned contractor's task and identify the applicable plan version. Distinguish aerial photograph analysis, on-site investigation and result report. The commission must identify which step is to be undertaken now.
04
Contacts for outstanding questions
Define who obtains missing documents and communicates plan changes. Hand over these tasks when project management changes too. Organising coordination does not confer additional specialist or official powers.
Project documents
Documents that establish the next step
Assign each document to its purpose
A permit document, technical report and internal scheduling note contain different findings. Keep them with clear titles and current status. Shared storage makes access easier but does not make their content interchangeable. A specific decision uses the document actually relevant to it, in full.
Also assign the applicable ground surface and depth range considered to each document where required for its findings. A ground intervention deepened later may extend beyond an earlier investigation scope. For demolition, fill or changed ground levels, compare previous and current references. Specialist review identifies additional questions arising. An expressly agreed additional investigation is documented with the relevant plan version and then assigned to the correct task.
Link new results to earlier outstanding questions
When supplementary work is completed, it must be clear which previous gap it answers. Assign the report and annexes to the relevant areas. Other outstanding questions remain unless addressed too. Site management thus receives a traceable status rather than a blanket declaration that the entire project is complete.
Describe which outstanding question prompted the supplementary commission and what answer its result actually provides. An investigation of individual points is recorded with those points and their depth coverage. Remaining areas between points or inaccessible areas stay separately identifiable. Using the related reports, site management can have it clarified which documents apply to the next ground intervention. After clearance work, the clearance record with its scope, results and limitations supplements these documents for the points or areas actually treated and their depth reference. Before necessary preparatory groundworks, the investigations and protective measures needed for them are agreed.
Construction sequence
Coordinate investigation and construction sections
When project management changes
Hand over complete applications, responses, reports and plan versions with their actual status. Identify outstanding annexes and areas not yet addressed. New project management must be able to understand the connections without relying on individual participants' memories. Organisational handover and specialist results remain separate.
Before starting the next construction section
Check whether existing results cover current ground interventions. Newly added work or plan changes are considered separately. Site management receives the applicable documents and outstanding prerequisites. A task previously marked complete is not transferred unchecked to a changed section.
Method selection
Select methods according to the task and survey conditions
Historical records and aerial photographs
At handover from permit planning, the submitted aerial photograph enquiry remains distinguishable from the later analysis. Historical assessment identifies discernible indications using available images, their interpretability and the area considered. It is linked to today's ground intervention and other older documents. The absence of a discernible indication does not document a measurement of today's ground. Subsequent specialist planning therefore checks both the response's spatial relevance and the technical finding still needed. Future plan changes receive their own comparison.
Understand aerial photograph assessmentMagnetometric survey
Magnetic investigations detect magnetic anomalies. If such an investigation is agreed following an official response, the areas identified for it and the investigation objective must be available together. Specialist planning considers expected objects, ground conditions and interference such as fences, utilities or existing structures. A strong signal does not yet identify explosive ordnance. Measurement, interpretation and any additional clarification are planned and documented for the same identified area. Magnetometry measures the magnetic field passively. The magnetic effect of the target object is decisive; electrical conductivity alone does not establish detectability by this method.
Understand the scope of magnetometryElectromagnetic methods
For an electromagnetic investigation, the finding needed from the documents is translated into a specific specialist commission. Suitability for metallic targets also depends on site conditions. Plans describe accessible survey areas, interfering installations and spatial scope; instrument availability alone does not determine the method. Survey conditions and location references belong in the result documents so new project management can continue using the findings. An additional method follows from specialist assessment and the outstanding question. Transient electromagnetic methods, or TDEM, evaluate the time-dependent electromagnetic response of conductive objects. The method is selected according to the investigation objective and actual survey conditions.
Understand electromagnetic surveyingGround-penetrating radar
Under suitable conditions, ground-penetrating radar can detect subsurface reflections and structures. If a radar report is already in a handed-over file, first read its commission, survey area and objective. A utility or structural investigation is not automatically an ordnance investigation. Ground conditions, moisture and installations limit interpretability; both anomalous and unremarkable images need specialist interpretation. For the new construction phase, clarify whether the report actually addresses the planned areas and depths. Limits and necessary additions are passed on with the associated plans.
GPR and limitationsDeep-ground and downhole surveys
If the next phase includes deeper foundations or additional deep connections, compare them with the volumes of ground already investigated. If surface investigation cannot establish what is needed, plan a suitable deep-ground or downhole method. Location, depth, borehole layout and existing utilities must be traceable for this purpose. Creating investigation access forms part of this specialist preparation. A blanket grid or general depth figure does not replace a task-specific design. At handover, the method used and volumes actually covered remain identifiable.
Prepare deep interventionsSurvey during construction
For a section that could only partly be investigated beforehand, the next project manager must be able to identify the question still outstanding. Specialist planners decide from actual conditions whether an approach accompanying construction is suitable. It links necessary investigations with interpretation and communication of findings within the construction programme. The commission describes when specialist work takes place and how new findings are passed on. Merely observing excavation does not replace a necessary survey. Areas not yet addressed or with restricted interpretability remain marked in the documents until suitable further clarification takes place.
Agree the approach during constructionTechnical assessment
Derive the investigation commission from existing documents
Read maps and recommendations in full
The historical aerial photograph analysis must be read with its area boundary and explanations. Pass specialist recommendations on with the associated conditions. Without the map or an annex, a single finding may lose its essential reference.
For older documents, record the construction stage for which they were prepared. Later demolition or a new connection may affect additional working areas. Describe the new task with its location and elevation reference so existing information can be compared. Missing historical findings are assessed with the responsible authority for further work. Official analysis and subsequent technical investigation remain distinguishable in the project file with their respective commission, result and area addressed.
Describe planned ground interventions and obstacles
Before a survey the investigation objective and site conditions are checked. Describe the groundworks and known obstacles in the commission. A desired construction start or generally worded service item alone does not determine a suitable method. Selection considers intervention depth, ground structure, existing utilities, interfering objects and actual measurability. A technically necessary addition or permissible supervision during construction is agreed with its own service scope.
Agree the expected report scope
A clearance plan or investigation plan defines the area, relevant depths and specialist objective. The later report must refer to this. At handover, also identify tasks undertaken by other participants. The results documentation records the scope actually performed.
In the commission, distinguish planned work from the scope evidenced later. If a section remains inaccessible or another survey approach is needed, changes are agreed by specialists and recorded traceably. The report explains which areas were addressed and within what limits. Agreed associated plans show the spatial reference. For later groundworks, the finding is compared with the new plans; work still needed is identified as specific follow-up measures.
Next steps
Track outstanding tasks through to construction
Check existing responses and annexes
Check which responses, reports and annexes are available. List missing documents as outstanding. Sending an enquiry does not yet establish an investigation result. Identify the project address, planned groundworks and outstanding investigation question. Existing documents are checked for revision status, spatial relevance and gaps. Necessary research is undertaken where historical findings are missing. The required official aerial photograph analysis is processed by the responsible state service; its result is assigned to today's project.
Define the next step for every outstanding question
Record what is needed next: obtaining a document, clarifying a condition or preparing an investigation. Progress can then be tracked without marking work still outstanding as complete. The suitable method is agreed according to the investigation objective, intervention depth, ground structure, utilities and survey conditions. Permissible commissioning and necessary coordination with the authorities are clarified before execution.
Pass on plan changes in good time
Inform specialist planners about additional groundworks, changed depths and new plan versions. Have them check whether the previous commission and existing results are still sufficient. This clarification must precede the groundworks concerned.
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.
Hand over results and unresolved areas
Provide site management with results, plans and conditions. Refer to the complete documents in the handover note. Identify uninvestigated areas and outstanding tasks even if other parts are already complete.
Documentation
What the permit file and investigation report each establish
Findings and their scope
Check each document's content. A letter in the permit file does not, by itself, establish that a particular area was technically investigated. Nor does a specialist report replace necessary official processing of changed plans.
Project responsibilities
The commissioned documentation records investigated areas, results and limitations. The BFR Kampfmittelräumung provide specialist guidance for this; their direct scope concerns federal properties. The tasks of the local public order authority and other bodies responsible under North Rhine-Westphalia law remain unaffected.
Working approach
How FONTANA-EOD works
Document the agreed specialist service clearly
For the Lünen project, FONTANA-EOD undertakes the agreed specialist task using the document status actually available. A submitted enquiry, official response and technical report are assessed according to their respective contribution. Before the work begins, agree the investigation objective, accessible areas and results needed. When project management changes, this commission remains available with the applicable maps. New plans or changed conditions are related to it before the affected work. The report documents the work performed, its limits and specialist clarification still needed.
Discuss the investigation taskThe task before the equipment
A recommendation for further investigations is first linked to the question it is intended to clarify. Specialist planners then justify the suitable method for the identified ground intervention and actual site conditions. An instrument named in a quotation or the method used on a neighbouring site alone is not sufficient. At handover, it remains clear which outstanding question led to the selected investigation commission.
Keep limitations visible
A response or result drawing may address only part of the planned construction section. Inaccessible areas and limited findings are therefore passed on with their locations. New site management receives a clear distinction between areas addressed and tasks still outstanding. It can then coordinate the next investigation and access needed. A total area statement is supplemented by actual limitations rather than losing them at handover.
Clarify changes before intervening in the ground
If the ground intervention is relocated, deepened or planned with a different construction method after an official response, send the changed version to the responsible specialist planners. They compare it with existing results and clarify the addition needed. For the next section, record which plan underlay the original work and what question the change raised. Coordination takes place before the affected groundworks, even if the project name is unchanged.
Hand over the report and plan together
When project or site management changes, letters, investigation reports and associated plans are handed over together. A short overview identifies their respective status and points to the applicable documents. Specialist findings follow from the documented investigation scope with its spatial references and limits. Outstanding annexes or questions are expressly assigned to the next responsible person. They can then prepare the next specialist commission on a complete basis rather than carrying forward a single result sentence without its context.
Understand the results
Use technical statements for the next decision
A brief status needs evidence
Labels such as applied for, checked or completed may mean different steps. Refer to the specific document and area addressed. This makes clear what finding actually exists. Its specialist significance follows the evidence's content, rather than the status label alone.
Understand investigation reports and their limitationsCompare current plans with existing investigations
A new design may include different areas or depths from existing results. Compare both before further use. Shared storage does not confirm agreement. Changes and findings still missing are explicitly identified so the next commission can address actual needs.
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 project handover for construction in Lünen
When should aerial photograph analysis be requested in Lünen?
Lünen recommends submitting the application together with the building application already. Follow the current service portal information and submit all necessary documents. This does not promise a particular processing time or fixed construction start.
Does submitting an application mean groundworks can begin?
The application initially starts the review process. Whether the planned work can begin must be clarified using the response, specific plans and applicable requirements. Proof of submission does not replace an investigation result.
Which documents does a newly commissioned specialist contractor need?
Pass on the current groundworks plan, official responses with all annexes and existing investigation reports. Identify older plans and outstanding questions. The commission scope is agreed using these documents.
How is a change of project management handled?
Hand over the task list, complete documents and actual processing status. Identify outstanding questions and contacts. It must remain clear which steps are complete and which need further work.
What applies if a suspicious object is found during the work?
Stop work, leave the object untouched and move away from the affected area. Warn other people and notify the police immediately on 110. Further measures follow the authorities' instructions.
What information defines a processing status?
The specific document, its date, the area concerned and outstanding tasks. These details should make a general label such as checked traceable.
How are missing annexes handled at handover?
They are explicitly identified as missing and requested from the responsible issuer. An incomplete response is not used as though all its associated limits and conditions were already available.
How are report scope and costs defined?
Only questions and areas actually addressed in each report are recorded as answered. Other gaps remain identifiable and are followed up separately. The effort depends on usable previous documents, access and necessary preparation, the area or number and depth of investigation points, a suitable method, survey conditions, interpretation and documentation. Specialist services still required are offered according to the outstanding task and its permissible scope.
Project enquiry
Coordinate the investigation for your Lünen project
Send documents with their status
Include applications, responses and reports with maps, and identify missing annexes. Also provide the project address and applicable plan version. Mark areas already addressed and those needing further findings. Preparation includes complete letters with their spatial annexes, existing utility information and known access restrictions. If plans change, explain which groundworks have been added and which previously planned activities have been removed.
Describe the next decision
Identify the intended construction section, current plan changes and contacts for outstanding questions. State the location and depth scope, including additional working areas, shafts or utility connections. Tasks for the specialist contractor, designers and site management are agreed on this basis. For an area clearance or recovery task, describe the specific specialist question. Its permissible scope and necessary commissioning are clarified with the responsible authority. Missing documents are identified as individual questions and updated in the project file when received.
Technical methods and limits
Technical methods and limitsInvestigation process
Investigation 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.
