High Wycombe · COSHH / HSG258
Statutory thorough examination and testing of local exhaust ventilation for High Wycombe workshops and production sites, keeping fume and dust control compliant with COSHH and HSE guidance HSG258.
High Wycombe
High Wycombe is a Buckinghamshire town of around 128,000 in the Chiltern Hills, once the chair-making capital of the world.
The signature trade is furniture - the furniture and wood manufacturing that grew from the Windsor-chair workshops - alongside precision engineering and aerospace, paper and print, and plastics, across the Cressex Business Park and Sands estates, with the bodyshops between them.
Every one of those High Wycombe processes puts fume, dust, mist or vapour into the air, and COSHH requires it controlled at source - which means local exhaust ventilation, thoroughly examined and tested at least every fourteen months. We test the LEV across all of it - from the Cressex Business Park units to the smaller High Wycombe workshops - with capture and face-velocity readings, a clear pass or remedial outcome and system labelling.
By sector
Where fume, dust, mist or vapour is pulled away at the point it is made, that is LEV - and for employers in High Wycombe and across Buckinghamshire it stands as their COSHH evidence.
Wood-dust extraction on the saws, sanders and CNC routers, a trade rooted in High Wycombe's chair-making history. Hardwood dust is a known carcinogen; ductwork and filters are checked for capture and leakage.
Machining, grinding and fume extraction across the precision-engineering and aerospace units, where metal dust and mist need capture proven.
Solvent, ink-mist and dust extraction across the paper and print lines, where VOC vapour and paper dust need capture at source.
On-torch extraction, fume arms and downdraught benches across the Cressex Business Park and Sands units. Since the HSE's 2019 reclassification, all welding fume - mild steel included - is treated as carcinogenic.
Spray-booth and prep-bay extraction at High Wycombe bodyshops. Two-pack paints release isocyanates - the leading cause of occupational asthma - so booth airflow is examined to its design figure.
Fume-cupboard face-velocity testing for Buckinghamshire New University and Wycombe Hospital, to the containment their work demands.
On the ground in High Wycombe
We are out under High Wycombe's extraction every week. The proof that matters is the jobs, not a stock photo.
A traditional furniture workshop in High Wycombe had its sawdust cyclone collector running with a completely full hopper, forcing shavings back up into the exhaust stack. We emptied the wood-waste hopper, cleared the secondary filter screen and tested the static pressure drop across the inlet. It passed once cleared, with the transport velocity back to a clean 19 metres per second. The workshop still ran historic belt-driven overhead pulleys, so extra vigilance and spacing were needed around the running tools.
The test
Under HSG258 a statutory LEV test is no visual once-over. For a High Wycombe system it has to answer three things - whether the system is sound, whether it still draws at the hood, and whether that draw holds to what it was designed to deliver.
Ductwork, hoods, filters, fans and dampers checked for damage, blockage and leakage across the Cressex Business Park units - the faults that quietly kill capture.
Face and capture velocities, static pressures and airflows measured at each hood with calibrated instruments - numbers, not opinion.
Readings compared to the system's commissioning figures, so drift from as-designed is caught before it becomes a failure on a High Wycombe line.
Where exposure is in question - a furniture and wood manufacturing process, say - sampling confirms whether control is actually protecting the people at the process.
The duty
Under Regulation 9 of COSHH the obligation sits squarely with the employer - any LEV that controls a hazardous substance needs a thorough examination and test at least every fourteen months, and the records held for five years.
For the great majority of High Wycombe sites, from the Cressex Business Park units to the one-man workshops, the fourteen-month deadline is what catches people out: once it passes the system is non-compliant regardless of its actual state. We carry out the examination, label every hood with its status and next-due date, and issue the report an HSE inspector or your insurer expects to see - and if a point fails, you get the number, the cause and the fix rather than a bare fail.
How it runs
Full visual and structural check of every hood, duct run, filter and fan across the High Wycombe site.
Calibrated velocity, pressure and airflow readings at each extraction point.
A COSHH-compliant report: results against benchmark, clear pass or fail, and plain-English actions for the High Wycombe duty-holder.
Each system tagged with status and next-due date, so compliance is visible on the Sands floor.
Questions
Under COSHH Regulation 9, most local exhaust ventilation needs a thorough examination and test at least every 14 months, with higher-risk processes more often. A furniture and wood manufacturing bay, a precision engineering and aerospace bench and a lab fume cupboard can each sit on a different interval - we set the right one for every system.
Furniture and wood manufacturing, precision engineering and aerospace, paper and print, welding and fabrication, vehicle body and paint, and the labs of the university and hospital - the trades clustered around Cressex Business Park and Sands and across the wider Buckinghamshire.
No. LEV testing is a statutory examination of fume and dust control to COSHH and HSG258, with capture and face-velocity readings; TR19 is kitchen grease and fire risk. We do both across High Wycombe, but a Cressex Business Park fabrication shop and a Desborough Road canopy are kept as the separate jobs they are.
Yes. We plan testing around production shifts at the Cressex Business Park units, term-time access at the High Wycombe university labs, and normal hours at smaller workshops, so the examination never stops the line.
Yes. A new spray booth or fume-arm install at a High Wycombe workshop needs a commissioning test to prove it performs to its design figures before it goes into service - we measure it and document the baseline the 14-month clock then runs from.
Yes. Each hood is labelled with its status and next-due date, and you get the HSG258 report and system schematic for your COSHH file - the record an HSE inspector visiting a Cressex Business Park unit will ask to see.
We record it as remedial and set out what is needed - airflow, ductwork, filtration or capture at the hood. You do the work and we re-test, and on a Cressex Business Park production line we can usually fit the re-test around your shifts. We will not pass a system that does not control exposure.
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