Health and safety in concrete scanning
Concrete scanning is low-risk work that becomes higher-risk when shortcuts are taken. Here is the H&S framework for safe scanning on UK construction sites.
Concrete scanning is one of the lower-risk activities on a UK construction site. The equipment is hand-held or wheeled, the operations are non-destructive, and the surveyor is not creating exposure for themselves or others by the act of scanning. That said, “low risk” is not “no risk”, and a defensible H&S approach to scanning is what distinguishes professional engagements from ad-hoc ones. Here is the framework.
The hazards in scanning
Although scanning itself is benign, the scanning environment usually is not:
- Live construction site. The general site hazards apply: working at height, moving plant, manual handling, slips trips and falls, dust and noise from adjacent work.
- Working at height. Scanning soffits, columns above shoulder height, or upper-level slabs requires platforms, MEWPs, or scaffolding.
- Confined spaces. Some scanning environments — voids under floors, plant rooms, basements — count as confined or semi-confined.
- Live services. The whole point of scanning is to find services so they can be avoided. The act of scanning also requires care to avoid contact with live plant.
- Surface preparation. Cleaning and preparing surfaces involves manual handling and sometimes hot or cold environments.
- Equipment hazards. GPR systems are battery-powered; battery handling and lifting heavy systems carry their own risks.
A defensible engagement assesses each of these and mitigates them in a documented plan.
Method statement and risk assessment
Every defensible scanning engagement is supported by:
- A method statement that describes what will be done, by whom, with what equipment, in what sequence.
- A risk assessment that identifies hazards, controls, and residual risk for the proposed work.
These are issued before attendance, reviewed by the contractor’s H&S team, and signed off as a condition of access. A surveyor who turns up without these documents — or who produces generic templates with no site-specific content — is operating below industry standard.
PPE
Standard PPE on a UK construction site includes:
- Hard hat.
- Safety glasses.
- High-visibility clothing.
- Safety footwear.
- Gloves where required.
- Respiratory protection where dust or contaminant levels warrant.
- Hearing protection where noise levels warrant.
For specialist environments, additional PPE may apply: arc-flash protection in electrical environments, FRC clothing in hot work areas, FFP3 respirators in dust-heavy areas, and more.
A defensible surveyor turns up with all of the standard PPE and any specialist items that the site brief requires. They do not borrow PPE from the contractor.
Site induction
Most UK construction sites require a documented induction before access. The induction:
- Briefs the surveyor on site-specific hazards.
- Sets out emergency procedures and assembly points.
- Confirms PPE requirements.
- Records the surveyor’s competencies.
A pre-attendance induction process saves time on the day. A surveyor who has not been inducted before showing up and is then inducted on the day is wasting site time; a surveyor who has been pre-inducted is ready to start work on arrival.
Working at height
Scanning above shoulder height — soffits, upper columns, beams — typically requires:
- A documented working-at-height risk assessment.
- An appropriate access platform: MEWP, scaffold tower, or fixed scaffolding.
- Operator training and authorisation for the access equipment used.
- Edge protection where appropriate.
- Tool retention to prevent dropped objects.
A scanning surveyor working at height should hold IPAF or PASMA training as appropriate, and should refuse to work from inappropriate access (extension ladders, kit boxes, anything not designed for the work).
Live electrical environments
Scanning in environments with live electrical infrastructure — substations, plant rooms, data centres — adds specific controls:
- Permit-to-work systems.
- Distance from live equipment.
- Insulated PPE if required.
- Authorised escort where appropriate.
Reputable surveyors decline to work in environments where the controls are not in place. Doing the work without the controls is unprofessional and unsafe.
Confined spaces
Some scanning environments meet the definition of a confined space. The standard controls apply:
- Atmospheric monitoring before entry.
- Permit-to-work systems.
- Standby personnel.
- Specific competencies for confined space work.
- Rescue arrangements.
A surveyor not trained in confined space entry should not enter such an environment regardless of the urgency.
Lone working
Some scanning is done by a single surveyor on a single attendance. Standard lone-working controls:
- Documented arrival and completion times.
- A check-in protocol with the company office.
- An emergency contact at the site.
- Refusal of work where the lone-working environment is unsafe.
Equipment and battery handling
GPR systems have specific equipment hazards:
- Lithium batteries: handle, charge, and store correctly.
- Cable management: avoid trailing leads.
- Manual handling: lift correctly, use trolleys for larger systems.
- Daily equipment checks.
These are minor compared with the construction-site hazards, but a defensible engagement addresses them.
H&S culture in the company
The visible signs of a company that takes H&S seriously:
- Documented method statements and risk assessments as standard.
- Investment in PPE and training.
- Refusal of work where H&S controls are inadequate.
- Reporting and learning from near-misses.
- Senior accountability for H&S performance.
Companies that treat H&S as paperwork to be completed rather than a culture to be lived are companies that occasionally produce safety incidents. Companies that treat it as a culture do not.
Practical advice
For a contractor commissioning scanning work:
- Insist on method statement and risk assessment before attendance.
- Pre-induct the surveyor wherever practical.
- Confirm the access arrangements (working at height, confined space) match what the surveyor needs.
- Provide the site-specific information the surveyor needs to assess their risk.
- Empower both your team and the surveyor to stop work if any control is inadequate.
H&S in scanning is not exotic, but it is not optional. The defensible engagement integrates it into every step of the work. The cost is small; the value is significant.