Day 3: Documents Required Before Starting a Geotechnical Project
Introduction
One of the most common mistakes fresh geotechnical engineers make is starting site work without fully understanding the project documents.
In professional practice, a geotechnical investigation does not start on site — it starts at the desk.
Before any drilling, excavation, or testing begins, the geotechnical engineer must carefully review a set of essential documents. These documents control what you do, where you do it, and how you report it.
This Day 3 article explains all the key documents required before starting a geotechnical project and why each one matters.
Why Document Review Is Critical
Proper document review helps to:
Avoid drilling at wrong locations
Prevent missing required tests
Ensure compliance with authority requirements
Reduce report rejection and project delays
Geotechnical engineers carry responsibility not only for safety, but also for accuracy and traceability.
Key Documents Required Before Starting Site Work
The following documents are usually provided in the project file or through the client/consultant.
1. Geotechnical Investigation Permit
The geotechnical investigation permit is a mandatory approval document, especially for projects submitted to authorities such as municipalities.
It usually includes:
Permit number and date of issuance
Project name
Plot, sector, and zone numbers
Owner name
Consultant name
Special notes or conditions
Why It Matters
It gives legal permission to conduct investigation
Authorities cross-check report details with the permit
Any mismatch can lead to report rejection
⚠ Some special projects (e.g., military or restricted projects) may not require permits, but this must be confirmed officially.
2. Land Site Plan
The land site plan shows property boundaries and ownership details.
It typically includes:
Plot limits
Dimensions
Adjacent plots or roads
Owner information
Why It Matters
Ensures drilling is done within project boundaries
Prevents legal issues
Helps coordinate with site access
Fresh graduate tip:
👉 Always carry the site plan when visiting site for the first time.
3. Approved Scope of Work
The scope of work defines exactly what the geotechnical investigation includes.
It may specify:
Number of boreholes
Borehole depths
Trial pits or CPT requirements
In-situ tests (SPT, permeability, etc.)
Laboratory testing program
Type of report (factual or interpretive)
Why It Matters
You cannot add or remove tests without approval
Authorities and clients check compliance with scope
Cost and timeline are based on this document
❌ Never assume additional tests are allowed without approval.
4. Geotechnical Investigation Method Statement
The method statement explains how the investigation will be conducted.
It usually covers:
Drilling methods
Excavation procedures
Safety measures
Environmental considerations
Standards to be followed
Why It Matters
Ensures safe site operations
Confirms compliance with specifications
Demonstrates professionalism
Authorities may request this document during audits.
5. ADM Approved Layout Plan (or Authority Layout)
This is one of the most critical documents.
It shows:
Borehole, trial pit, and CPT locations
Coordinates
Ground levels
Test IDs
Why It Matters
Drilling must be done exactly at approved locations
Any deviation must be documented and approved
Authority systems (such as ADM) verify location data
Fresh graduate warning:
⚠ Never “shift” a location on site without proper approval.
6. Quotation, LPO, or Contract Documents
These documents confirm:
Agreed test quantities
Prices
Deliverables
Client expectations
Why It Matters
Prevents disputes
Confirms testing responsibilities
Ensures all paid tests are completed
From an engineering perspective, all agreed tests must be delivered in the final report.
How These Documents Are Used Together
A professional geotechnical engineer cross-checks:
Permit details vs report title page
Layout plan vs borehole logs
Scope of work vs laboratory tests
Quotation vs delivered results
Consistency across documents is essential.
Common Mistakes Fresh Graduates Make
Starting site work without reading scope
Ignoring layout coordinates
Assuming old project requirements apply
Not checking permit details
These mistakes often lead to:
Report rejection
Rework
Loss of client trust
Day 3 Key Takeaways
Geotechnical work starts with document review
Each document controls a different part of the project
Accuracy and compliance are non-negotiable
Good engineers read before they drill
What’s Next (Day 4)
In Day 4, we will explain:
👉 Geotechnical permits and site plans in detail, including common authority requirements and real-site practices.
Geotech Guide – Practical learning for future geotechnical engineers.