Take clear action with Occupational Hygiene Services.
If you’re responsible for workplace health, your decisions need to be backed by data – not guesswork. Our services help you spot problems early, act with confidence, and avoid costly consequences later.
The OHSL Way
We identify hazards
We ask the right questions to define a clear, tailored scope – ensuring the site visit runs smoothly and all relevant hazards are identified accurately.
Evaluate risks and controls
We don’t just take measurements – we assess whether your existing controls are genuinely protecting people.
And recommend reliable actions
You’ll get clear, jargon-free advice you can act practically with confidence – no guesswork or unnecessary upselling.
Our Core Services
Air Monitoring
We assess hazards including dusts, vapours, fumes and gases – identifying potential exposures and evaluating whether existing controls are adequate.
✔ Personal and static sampling.
✔ COSHH risk assessment support.
✔ Interpretable lab-backed reporting.
Noise Surveys
We measure exposure to workplace noise – and evaluate whether hearing protection or other control measures are working as intended and the steps needed to comply with the Regulations and Approved Code of Practice are effectively in place..
✔ Noise mapping and personal dosimetry
✔ Advice on risk zones and PPE effectiveness
✔ Aligned with Control of Noise at Work Regulations
LEV Testing
Local Exhaust Ventilation (LEV) systems must be tested every 14 months or in line with schedule 4 of COSHH Regulations 2002, but more importantly, they must work. We evaluate whether systems are controlling airborne hazards effectively and recommend improvements where needed.
✔ Thorough testing of extraction systems
✔ Reporting in line with HSG258
✔ Maintenance advice and control verification
COSHH & Hazardous Substance Assessments
Working with hazardous substances? We help you identify the risks, assess your controls, and meet your duties under the COSHH Regulations 2002 and Approved Code of Practice.
✔ Support for policy, audits, and insurers
✔ Evaluations tailored to your substances and tasks
✔ Practical advice – no generic recommendations.
Lighting & Thermal Comfort Assessments
In some environments, lighting levels and temperature can directly affect employee well-being. We carry out assessments to determine whether your working conditions support health, concentration, and productivity.
✔ Lighting lux level measurement
✔ Temperature and humidity assessments
✔ Recommendations to improve workplace conditions
Not sure where to begin?
Get in touch below with your questions and we’d be happy to help guide you.
Independent. Experienced. ISO 9001 Certified.
Meet Your Occupational Hygiene Partners.
OHSL was founded by three senior occupational hygienists – Gareth Ison, Helen Thomas, and Andy Wallace – with over 60 years of combined experience. Our work spans air monitoring, noise exposure, LEV assessments, and hazardous substance control – all delivered with technical accuracy and practical insight.
We know how frustrating it is to work with providers who overcomplicate, overcharge, or under-deliver. We don’t offer box-ticking exercises. We work with you to protect people’s health, demonstrate best practices, and stay ahead of risk.