Technical map view of SGD Süd in Rhineland-Palatinate marking Neustadt an der Weinstraße as a location for explosive ordnance assessment and surveying by FONTANA-EOD

Explosive ordnance surveying for your construction project in Frankenthal

An area is to be redeveloped while access routes or neighbouring areas remain in use. To align explosive ordnance assessment with the construction programme, access and the investigation task must be considered together early. FONTANA-EOD helps clients, design consultancies and site management in Frankenthal coordinate these requirements before proposed groundworks.

Access

Coordinate the areas required in good time.

Use

Separate traffic from work areas.

Results

Allocate completed sections precisely.

Discuss the project's technical requirementsExplosive ordnance assessment in Rhineland-Palatinate
Assess the construction project

Link time windows to the area actually accessible

For your investigation in Frankenthal, available time windows are compared with the work areas required. We consider access, ongoing operations and possible limitations. The specialist task remains decisive: accessible subareas, outstanding areas and handover of results are established traceably before the next work step.

Project site

Connect the site with the specific construction task

Schematic map with coat of arms, beside a tablet, hard hat, pen and notebook.

Read the Frankenthal night works as work planning at that time

The notice of December 2022 describes separate night-time investigation windows at the railway station and central bus station to make areas available and accommodate traffic. For your present-day project, access and time windows required are coordinated using your own task. Investigation scope and result handover remain specifically defined regardless of the time of day selected. Frankenthal (Pfalz) is an independent city in Rhineland-Palatinate, Germany. The enquiry identifies the project address, cadastral parcels and construction section concerned. For works on transport areas, access routes or commercial or operational areas, temporarily continuing use is described specifically. Projects outside the city identify the actual municipality. The locally responsible office is established using the project location and approaching task.

The overview of the SGD Süd provides further local information for the regional context of your construction project.

Rhineland-Palatinate
Local context

Assess access and historical information in Frankenthal

Understand the station closures at that time

On 12 December 2022, the City of Frankenthal announced explosive ordnance surveys at the station forecourt, central bus station and Eisenbahnstraße. The night closures at that time were intended to make investigation areas accessible and minimise disruption to bus services. The notice names Consulting-Engineers-Göttig from Worms as the commissioned company. It describes a measure at that time, not a current closure.

According to the announcement at that time, combined aerial photograph and document analysis had already taken place. The outstanding question of possible explosive ordnance within the proposed construction area led to technical investigation. Site organisation thus remained linked to a defined specialist task. For a present-day project, its own earlier documents and proposed interventions are brought together in the same traceable way.

In its commemorative article of 2023, the City of Frankenthal recalls the air raid of 23 September 1943 and severe damage within the city. Such historical indications are linked to the specific project location and available information. A present-day construction task also considers known changes through reconstruction, later development or utility works. Whether further specialist work is needed is assessed for the area concerned and proposed ground interventions.

Plan accessibility for your own task

For a new project, time windows and access must be planned according to the actual task. An available appointment does not yet establish whether the whole area can be investigated. Conversely, one transport project does not establish a general obligation to work at night. What matters is that the areas needed are accessible and investigation conditions are assessed by specialists.

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 addresses the agreed investigation and documentation scope. Official requirements and decisions are clarified with the respective competent authorities. Documents required for a specific procedure depend on the site and project. The technical report describes the specialist service carried out with its spatial scope and limits of findings. Its applicability to further groundworks is checked against the specific intervention. Official decisions are made by the competent authorities.

The ADD describes the Rhineland-Palatinate explosive ordnance clearance service as supporting the locally responsible hazard-prevention authorities with specific explosive ordnance hazards. The responsible local regulatory authorities, or the police where delay would create danger, initiate official steps. General preventive investigations before construction, historical research and aerial photograph analyses are commissioned as private specialist services. Necessary official decisions on recovery, render-safe procedures or destruction remain with the competent authorities.

Investigation task

Which specialist task comes next?

Consider suitability and access together

Method selection follows the investigation objective, ground conditions and possible interference. Site availability is a further prerequisite. An easily accessible area is not suitable for every method solely for that reason. The proposed approach is coordinated with its requirements before a firm execution date is planned.

Compare methods and deployment conditions

Describe restricted areas as a separate task

If particular areas are not sufficiently accessible or interpretable, their further treatment is clarified by specialists. Identify the location concerned and findings still required. Investigation of other areas does not remove this limitation. Supplementary steps are therefore agreed with a specific scope and suitable prerequisites.

Compare investigation methods
Project types

Plan the investigation within ongoing operations

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

Show the work area with its access

Show on the current plan the areas required for investigation and how they can be reached. Also consider access to individual subareas. Preparation can then be coordinated with the parties concerned. Keeping one access route clear does not mean that all investigation areas are actually available.

Link subareas requiring investigation to a clearly identified plan version. Describe how specialist personnel reach the work area and which areas are needed for other uses during that time. These may include paths, delivery zones, stops or operational access routes. Where work is divided, the respective interfaces are identified on the plan. The area provided organisationally and the technically agreed investigation volume remain distinguishable so that a result can later be assigned to the area actually addressed.

Coordinate the sequence and tasks
Illustration: two people review plans and documents at a table beside a construction vehicle.

Compare available times with the task

Identify usable time windows and operational conditions early. Whether the proposed scope can be addressed within them is checked technically and organisationally. A short window does not change the findings required. If work must be divided, partial tasks are described clearly with their boundaries and intended handovers.

Coordination considers the actual duration and sequence of specialist work required and prerequisites for starting it. Identify operational interruptions and constraints that must be considered in planning. If an interruption or obstruction changes the proposed scope, the task concerned is coordinated again. Data already obtained remain assigned to their actual work status. An additional appointment receives a defined area and the outstanding specialist question.

Coordinate the sequence and tasks
Illustration: two people with a tablet beside a drawing table and a survey trolley on a construction site.

Raise changing obstructions early

Vehicles, material storage and changing use may affect accessibility. Clarify the conditions that should exist at the agreed appointment and who coordinates preparation. Other survey conditions still require separate assessment. A visually clear area does not therefore establish complete technical investigability of its ground.

Record the movable obstructions to be removed by the start of investigation and who coordinates this. Known fixed installations remain visible on the plans supplied. If an area is occupied again later, the work actually completed there beforehand is clarified. Changed use is communicated to specialist planning. An organisational confirmation of clear paths is filed with its purpose and distinguished from technical result documents.

Specialist services and investigation tasks
Preparation

Prepare the scope and commission together

Establish what needs to be known before commissioning the work

For the enquiry, describe the investigation area required and the periods when it is actually available. The specialist task is determined from this: interpreting existing documents, investigating a ground volume or further clarifying an assessed finding. Location, depth and existing knowledge belong in the commission. The quotation connects the investigation required with accessible work areas and result documents. A time window available at short notice alone determines neither the method nor the overall scope feasible.

Define the specialist task

Coordinate preparatory work with the investigation

Before investigation, coordinate which access routes, traffic routes or neighbouring operational areas remain in use and which areas are available for surveying. Utility information and work by other trades are incorporated. Specialist planning determines method-specific preparatory work and survey conditions required. Surface changes or new interventions are prepared with those responsible. Access, use and investigation thus receive a coherent sequence without independent groundworks merely to enable a survey appointment.

Clarify preparatory work in the programme

Agree 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 schedule
Tasks at the site

Clarify access and use before commissioning

01

Mark the work area on the plan

Show not only the later construction area but also access required for investigation. Define areas intended to remain in use during that time. If the precise division remains open, include this in the discussion. A specialist service is easier to prepare when the site's actual availability is known.

Mark available subareas and those still needing clarification on the same revision. If areas are made available in sections, the planned transition between them is described traceably. Preparatory works outside the later excavation pit are added with their location and depth. The respective permissible specialist commission is coordinated with the working spaces required. Outstanding information is clarified with the responsible parties before the construction work concerned and then incorporated into shared plans.

02

Identify installations and obstructions

Communicate known utilities, shafts, paved surfaces and other installations. This information supports selection of a suitable approach. A car park cleared of obstructions is not automatically surveyable without interference. Which obstructions affect investigation and which preparation is appropriate must be assessed using the question being addressed.

Assign existing utility and as-built plans their revision and origin. Unclear installations or positions are identified as specific questions. For investigation of individual points, their actual positions must be comparable with the proposed interventions. If a point is relocated, that difference is considered in specialist planning. Even with a known obstruction, the findings needed for the construction task and the investigation suitable under the conditions still require assessment.

03

Consider continuing operations explicitly

Identify access routes required and areas with continuing use. This may entail coordination with owners, operators or competent authorities. Such organisational questions should be clarified before the investigation appointment. Necessary traffic orders are made by the competent authorities; operational prerequisites are decided by the respective responsible parties.

Identify a coordinating contact and the operators or owners involved. Existing requirements for paths and operational areas are supplied with their respective purposes. Access and protective measures required for investigation are clarified before the work concerned. If a prerequisite changes, the specialist parties affected receive the new status. The agreement on using an area remains linked in time to actual work and result handover.

04

Do not merge construction sections indiscriminately

If only one subarea is accessible, the investigation scope must be identified accordingly. A result from the first section must not later represent the entire area without comparison. Planning should already identify areas initially remaining outstanding and the later intervention before which specialist work is required there.

Divide the construction project so that each approaching ground activity and the evidence needed for it remain identifiable. Intermediate areas, connecting trenches and additional working spaces are included insofar as interventions are proposed there. If the division changes, the ground volumes concerned are compared with existing report maps. Further specialist work needed from this receives a specific commission. An earlier result retains its documented spatial and depth reference and limitations at that time.

Project documents

Documents that establish the next step

Show the section addressed at every handover

Documentation identifies the area actually investigated and its limits of findings. Areas not yet accessible or not addressed remain visible. Site management can thus trace the status achieved despite work being carried out in sections. Attendance at the same appointment or location within the same cordon does not replace evidence of work carried out.

The results report and plan appendices remain available as a connected revision. For each section, mark the areas addressed, relevant depths and elevation reference used. Differences from the proposed scope are described with their technical consequences. Uninvestigated areas and those with limited interpretability remain identifiable with their location and outstanding task. After clearance work, the clearance record with its scope, results and limits of findings supplements the evidence chain for the area actually addressed and its site plan. Agreed recipients receive these documents so that the knowledge actually usable forms the basis before further groundworks.

Link postponed appointments to the investigation status

If a section becomes accessible later, the task and conditions are compared with current plans again. Existing results retain their areas at that time. Subsequent work receives clear allocation. This distinguishes knowledge already available from knowledge added through the extra appointment.

For a later appointment, the outstanding question and current construction state are supplied again. Changed ground surfaces, new utilities or preparatory works already carried out are identified insofar as known. Specialist planning can then assess which earlier findings remain usable and which conditions need reconsideration. Supplementary results remain linked to existing documents. The next project decision refers to the connected actual work status.

Construction sequence

Coordinate investigation and construction sections

Allocate preparation firmly before the appointment

Compile the intervention plan, existing reports and operational constraints. Coordinate with the parties involved which areas should be usable when. Responsibility for organisational preparation remains traceable. At the same time, it is assessed whether the agreed investigation scope can be addressed under these conditions or requires a coordinated division.

Coordinate the construction phase with us

Prepare the next section after a partial appointment

Add the result and areas addressed to the project overview. Compare remaining areas with the proposed construction programme. Further appointments are coordinated on this basis. A completed partial appointment thus becomes a traceable intermediate step without pre-empting the investigation status of areas not yet addressed.

Coordinate the construction phase with us
Method selection

Select methods according to the task and survey conditions

Historical records and aerial photographs

Historical documents and aerial photographs are related to the construction sections actually required. Available image periods, spatial coverage and identifiable limits of findings must be assessed. This basis is linked to present-day interventions and other existing knowledge before technical investigation is planned for available areas. An absence of visible findings must be distinguished from surveying the present-day ground. The investigation time selected extends neither historical findings nor their relevance to later works.

Understand aerial photograph assessment

Magnetometric survey

For magnetometric investigation, it is assessed whether magnetic anomalies can be interpreted within the work area required. Steel-bearing structures, utilities, fences or movable metal objects may affect survey conditions. Expected objects and the ground volume required also inform technical selection. An available section must therefore suit the task under its actual conditions too. Interpretation assesses signals and identifies necessary further clarification; signal strength alone does not identify explosive ordnance. Magnetometry measures the magnetic field passively. The magnetic effect of the object sought is decisive; electrical conductivity alone does not establish its detectability by this method.

Understand the scope of magnetometry

Electromagnetic methods

Electromagnetic methods are coordinated with the metallic objects sought and actual conditions within each investigation window. Installations, accessible areas and the findings required determine suitability. Data obtained receive spatial references and information on survey conditions. Results from different sections thus remain traceable even if obtained at separate appointments. A supplementary method is selected for the outstanding specialist question rather than inferred from the equipment available. Time-domain electromagnetic methods, TDEM for short, assess the electromagnetic response of conductive objects over time. The method is selected according to the investigation objective and actual survey conditions.

Understand electromagnetic surveying

Ground-penetrating radar

Under suitable conditions, ground-penetrating radar can depict subsurface structures and reflections. Investigation in sections requires traceable areas assessed and depth findings. Ground conditions, moisture and installations affect interpretability and are considered during interpretation. An anomaly does not automatically describe explosive ordnance; data without anomalies do not apply indiscriminately to further depths. Before a report obtained for other tasks is used for the explosive ordnance question, its purpose and scope are assessed.

GPR and limitations

Deep-ground and downhole surveys

For deeper groundworks, the findings achievable through surface investigation are clarified first. Deep-ground or borehole surveys required receive specific planning of location, depth, layout and utility reference. Technically suitable creation of access is coordinated with available work areas and continuing use. The ground volumes actually investigated and method used remain decisive. Neither a blanket grid nor a longer time window replaces this spatial task definition.

Prepare deep interventions

Survey during construction

If a necessary advance investigation cannot be completed in full for individual sections, the suitability of an approach accompanying construction is assessed by specialists. Its investigation and interpretation steps are incorporated into the proposed construction programme. The parties clarify communication of new findings and outstanding areas before subsequent work. Observation of excavation alone does not replace a necessary survey. For each available work window, the specialist service actually carried out and result handed over must remain traceable.

Agree the approach during construction
Technical assessment

What specialist planning additionally needs

Supply existing knowledge

Obtain existing reports, maps and official communications with their appendices. An aerial photograph analysis may indicate further investigation tasks. Which are relevant to the current project must be considered together with the location and depth of interventions. Site organisation should follow this task, not the other way round. Where historical questions remain, the research and aerial photograph analyses required are carried out by a suitable specialist company. They receive a reference to the present-day investigation area, proposed interventions and remaining limitations of the usable information.

Assess survey feasibility on site

The survey must fit the question and actual ground and surface conditions. Even with good access, installations or other interference may limit findings. Neither a particular equipment name nor the duration of an available time window guarantees a usable result for every position on the property. The investigation objective, intervention depth and target objects are compared with ground structure, existing utilities and interference. Magnetometry detects magnetic anomalies; active electromagnetic methods and ground-penetrating radar each have different operating conditions. For GPR, propagation conditions in the ground are decisive. For deeper interventions, the necessary deep-ground or borehole survey is planned by specialists. Borehole clearance or its associated technical evidence remains assigned to the ground volume actually investigated and its documented scope.

Consider investigation gaps in the construction programme

Inaccessible areas or those with limited interpretability belong in the documentation with their location. Where a clearance plan is required, outstanding tasks and possible further steps must be coordinated in it with the construction sections. Missing findings must not be silently adopted into the programme as a favourable result.

Next steps

From the available time window to a traceable result

01

Describe approaching works

Identify the groundworks proposed first and their location. These may include preparatory exploratory works or temporary installations. These interventions must also be considered technically. If construction may still change, show the variants so that investigation does not address only plans already superseded. Initial contact provides the project location, construction task and clarification sought. Existing reports, plans and official communications are checked for their plan revision, spatial reference, completeness and gaps.

02

Coordinate prerequisites with the parties involved

Record who clarifies access, operational interruptions and documents required. Specialist planning should know which prerequisites have actually been promised. An appointment alone does not confirm, for example, that an occupied subarea will be accessible in time. Outstanding points must be discussed again before work. Where historical questions remain, research and aerial photograph analyses required are carried out by a suitable specialist company. The investigation method is selected using the objective, intervention depth, ground structure, utilities, interfering objects and actual survey conditions. The specialist commission, access, preparatory work and protective measures required are clarified with the respective responsible parties before the ground interventions concerned.

03

Perform the agreed investigation

The agreed survey or proper specialist investigation accompanying construction is carried out within the permissible specialist commission on the coordinated areas and points. Survey data and observations receive a traceable spatial and elevation reference. Uninvestigated areas, restricted access and relevant interference are recorded.

04

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.

05

Record the scope addressed

After investigation, the areas and depths considered must be identifiable. Hand the report with its plan appendices to site management. If the actual work differs from the proposed scope, this is shown explicitly. A short appointment notice announcing completion of surveying does not replace the specialist results. The report and plan appendices document the specialist works carried out, their assessment and respective limits of findings.

06

Check changes before the next section

If site access is relocated or an additional utility planned, compare this change with existing evidence. Whether further measures are needed follows from the new task and previous result. Investigation of a neighbouring area is not a blanket substitute. The respective responsible parties use the connected documents to decide on additions or adjustments needed for the next specific ground intervention.

Documentation

Findings remain bound to the area and task

Findings and their scope

Keep specialist results together with the construction section layout. This preserves a traceable record of the basis used to prepare each work activity. Organisational permissions, such as site access, and specialist investigation results serve different purposes and should remain distinguishable in the documents.

Project responsibilities

The ADD distinguishes precautionary property assessments without a specific hazard background from state hazard prevention. FONTANA-EOD may be commissioned for the agreed private specialist services; official responsibilities remain unchanged. The BFR KMR apply directly to construction and operation of federal properties; outside that scope, their technical principles serve as guidance together with local requirements.

Working approach

How FONTANA-EOD works

Document the agreed specialist service clearly

FONTANA-EOD coordinates the agreed investigation with available areas and construction tasks requiring clarification. After a work step, the areas actually addressed and findings achieved are documented. Remaining limitations and follow-on tasks enter further planning. If access, use or the construction sequence changes, the agreed scope is checked before the work concerned. Separate appointments thus remain linked to their respective results and prerequisites.

Discuss the investigation task

The task before the equipment

The investigation question determines which method is suitable under available site conditions. A night window or access at short notice is a scheduling prerequisite, not a technical method choice. Equipment availability and neighbouring projects do not replace assessment of your own investigation objective.

Keep limitations visible

Areas that were inaccessible or insufficiently interpretable during a window are identified explicitly. They are not handed over as completed areas. Site management can coordinate their further investigation needs with the necessary accessibility and subsequent works.

Clarify changes before intervening in the ground

If a construction phase is postponed, traffic arrangements change or intervention depths increase, previous results are compared before the work concerned. Current plans identify the ground volume required and its availability. A cancelled investigation appointment remains an outstanding task until the specialist status needed has actually been achieved.

Hand over the report and plan together

The results report and plan appendices assign actual specialist works to their respective construction sections and appointments. Limitations and outstanding investigations remain linked to these documents. Even after a shift or contractor change, site management needs the complete basis for the subsequent work area rather than merely an overall appointment notice.

Understand the results

Use technical statements for the next decision

An appointment does not yet demonstrate coverage of an area

The calendar records when a service is scheduled. Result documents establish the area actually addressed. Keep both pieces of information separately traceable. This is particularly helpful with several sections or interrupted works. The technically documented scope is decisive for the next ground intervention.

Understand investigation reports and their limitations

Distinguish organisational preparation from survey conditions

Unobstructed access and coordinated operating times enable work. Technical interpretability additionally depends on the conditions of the area investigated. Both tasks are therefore addressed in preparation. If a prerequisite remains unclear, it is identified so that the appointment and expected result can be coordinated realistically.

Understand the service scope
Design and findings

Documents for the next construction decision

Illustration: aerial photographs and maps on two screens and printed on a desk.

Historical evidence and the current design

Aerial photograph interpretation is related to the actual groundworks. Its purpose and geographical scope remain distinct from a technical investigation of the ground as it is today.

Understand aerial photograph assessment
Illustration: two people review plans and documents at a table beside a construction vehicle.

Specialist reports for site management

The findings, their locations and limitations are handed over together. This makes clear to those carrying out the work which area has been investigated and which task remains outstanding.

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

Questions about construction during ongoing use

Must explosive ordnance surveying in Frankenthal take place at night?

No, the station notice at that time does not establish a general requirement. A suitable time window depends on the specific use, coordination required and investigation task. These prerequisites should be clarified before work.

Can just an accessible section be investigated initially?

The scope requires specialist planning. If only one section is addressed, the result must remain related precisely to it. For further areas, the findings needed before their later ground interventions must be clarified separately.

Is removing vehicles from the work area sufficient?

Unobstructed access may be a prerequisite but does not answer every question about survey feasibility. Ground conditions, installations, interference and the investigation objective must also be considered. Necessary preparations must therefore be coordinated with the selected approach.

How are changes in the construction programme considered?

Present changed areas, depths and works approaching first to specialist planners. It can then be assessed whether existing results remain sufficient. A change of date alone does not extend a report's scope of findings.

What applies if a suspicious object is found during the work?

Stop work in the area concerned and leave the object untouched and unmoved. Move away, keep others away and call the police on 110 from a safe distance. Follow official instructions.

Which information helps coordination with ongoing operations?

A site plan of areas required, available times, access and known operational restrictions. Organisational prerequisites are coordinated specifically using this.

How is a subarea inaccessible at the appointment documented?

It remains identifiable as an area not addressed. The subsequent task and any additional appointment are agreed separately.

Which cost factors matter for investigations in sections?

Effort depends on usable earlier documents, preparatory work and access required, area size or the number and depth of investigation points, the suitable method, survey conditions, interpretation and documentation. Identify available areas and outstanding organisational prerequisites. Any division required is coordinated with its actual specialist scope. The precautionary specialist service is offered with the agreed prerequisites; further operational or official tasks remain separately allocated.

Project enquiry

Prepare the first technical discussion

Show operational conditions

Identify usable times, access and temporarily occupied areas. State the project address, cadastral parcels and current construction state. Existing reports and official communications are supplied with their plans and appendices. Describe known installations, existing utilities and access still organisationally unresolved. Operators involved and the coordinating contact are identified. FONTANA-EOD discusses the specialist service needed for the proposed intervention and its prerequisites with you. Changes to individual areas' availability are communicated with their temporal and spatial reference.

Mark sections on the plan

Show investigation areas required and the proposed sequence of groundworks. Add proposed intervention depths and their relevant elevation reference. Mark sections initially available and areas whose use still needs clarification. Attach known operational or traffic requirements insofar as relevant to the task. Where plans change, new working spaces, relocated access and additional groundworks are identified. Investigations and protective measures required are also coordinated for preparatory interventions before execution.

GPR on a construction site
Project enquiry

Have your project assessed

Whether historical aerial photograph analysis, explosive ordnance surveying, surface surveying using GPR, magnetometry or TDEM, deep-ground surveys, downhole surveys, excavation supervision, area clearance or ordnance recovery is needed depends on the location, ground disturbance, depth, ground and existing documents. An early ordnance assessment provides clarity for tendering, programming, occupational safety and construction.

FONTANA-EOD combines its Section 7 SprengG licence, specialists holding Section 20 SprengG certificates of competence, suitable survey and clearance methods, and traceable documentation. Send the site plan, depth of ground disturbance, construction phase and existing documents for an initial technical assessment.

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