Knaresborough · COSHH / HSG258
Statutory thorough examination and testing of local exhaust ventilation for Knaresborough workshops and production sites, keeping fume and dust control compliant with COSHH and HSE guidance HSG258.
Knaresborough
Knaresborough is a market town on the River Nidd in North Yorkshire, home to around 15,000 people and known the world over for the ruined Norman castle and the four-arch railway viaduct that crown its riverside gorge.
Its working side sits on the Manse Lane Industrial Estate and St James Business Park, where joiners, engineers, fabricators and small manufacturers run the kind of light-industrial workshops a town this size depends on.
Every one of those Knaresborough 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 Manse Lane Industrial Estate units to the smaller Knaresborough workshops - with capture and face-velocity readings, a clear pass or remedial outcome and system labelling.
By sector
If a process captures fume, dust, mist or vapour at source, that capture system is LEV - and across Knaresborough and the wider North Yorkshire it is your evidence under COSHH.
Woodworking machines and sanding benches at Knaresborough joinery shops throw fine hardwood and MDF dust, a substance with its own workplace exposure limit. Extraction hoods and LEV ducting draw it off at the tool before it loads the lungs or the workshop air.
Flour is a known respiratory sensitiser, and the bakeries and food units around the town raise it every time a sack is tipped or a mixer runs. Local exhaust ventilation over the dough line keeps airborne flour dust below the level that triggers occupational asthma.
Metalworking fluids on the lathes and mills at Knaresborough engineering firms throw an oily mist that carries deep into the lungs. Mist-capture enclosures and extracted machine tools pull it back, and airflow is checked against the figure the guarding was designed to hold.
On-torch extraction, fume arms and downdraught benches across the Manse Lane and St James Business Park units. Since the HSE's 2019 reclassification, all welding fume - mild steel included - is treated as carcinogenic.
Spray-booth and prep-bay extraction at Knaresborough 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 Harrogate College and Harrogate District Hospital, to the containment their work demands.
On the ground in Knaresborough
We are out under Knaresborough's extraction every week. The proof that matters is the jobs, not a stock photo.
A blacksmith's forge in Knaresborough had the fume-extraction arms over its welding bench pulling below benchmark, with the fan not reaching its rated speed. We ran velocity and smoke tests across the capture hoods, cleared a blocked filter and freed a leaking connection, then re-checked each point. One hood failed at first and passed on re-test once the filter was cleared, and we issued the HSG258 report. Since the HSE reclassified welding fume as carcinogenic in 2019, on-torch capture was checked alongside the arms.
The test
A statutory LEV test under HSG258 is not a visual once-over. On a Knaresborough system it answers three things: is the system intact, does it still capture, and does that capture match what it was designed to do.
Ductwork, hoods, filters, fans and dampers checked for damage, blockage and leakage across the Manse Lane Industrial Estate 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 Knaresborough line.
Where exposure is in question - a joinery and woodwork process, say - sampling confirms whether control is actually protecting the people at the process.
The duty
COSHH Regulation 9 puts a hard duty on the employer: any LEV controlling a hazardous substance must have a thorough examination and test at least every fourteen months, with records kept for five years.
For most Knaresborough sites - from the Manse Lane Industrial Estate units to the smaller workshops - the fourteen-month clock is the one that bites: miss it and the system is non-compliant the day it lapses, whatever its condition. We examine, label each hood with its status and next-due date, and issue the report an HSE inspector or your insurer will ask to see. If something fails, you get the reading, the cause and the fix - not just a red sticker.
How it runs
Full visual and structural check of every hood, duct run, filter and fan across the Knaresborough 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 Knaresborough duty-holder.
Each system tagged with status and next-due date, so compliance is visible on the St James Business Park 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 joinery and woodwork bay, a bakeries and food production bench and a lab fume cupboard can each sit on a different interval - we set the right one for every system.
Yes. We plan testing around production shifts at the Manse Lane Industrial Estate units, term-time access at the Knaresborough university labs, and normal hours at smaller workshops, so the examination never stops the line.
A dated report to the HSG258 method, the readings taken, a pass or remedial outcome for each hood, and system labelling - the evidence a duty-holder at Manse Lane Industrial Estate or a smaller Knaresborough workshop needs for their COSHH file.
Yes. A new spray booth or fume-arm install at a Knaresborough 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 - the industrial estates and workshops around Manse Lane Industrial Estate and St James Business Park, the university and hospital labs, and the wider North Yorkshire.
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 Knaresborough, but a Manse Lane Industrial Estate fabrication shop and a Market Place canopy are kept as the separate jobs they are.
joinery and woodwork, bakeries and food production, engineering and machining, welding and fabrication, vehicle body and paint, and labs and fume cupboards - the trades clustered around Manse Lane Industrial Estate and St James Business Park and across the wider North Yorkshire.
Local knowledge
Knaresborough Castle rose above the Nidd gorge in Norman times, raised by Serlo de Burg, and Richard II was held prisoner within its walls in 1399 before Parliamentarian troops slighted the Royalist stronghold in 1646. The stonework endures; less visible is the air inside the town's workshops. On the Manse Lane and St James units, welding fume, wood dust and solvent vapour all need capturing at source, and local exhaust ventilation is what keeps a small trade breathing clean under COSHH.
Phoenix Duct Clean · by the numbers
Stay compliant with COSHH and HSG258. No-obligation quote, UK-wide.