Portishead · COSHH / HSG258
Statutory thorough examination and testing of local exhaust ventilation for Portishead workshops and production sites, keeping fume and dust control compliant with COSHH and HSE guidance HSG258.
Portishead
Portishead sits on the Severn Estuary eight miles west of Bristol, a coastal town that grew from a fishing village and Victorian dock into one of the fastest-expanding commuter towns in the West of England. Its name travelled far beyond Somerset when a Bristol trio borrowed it for their band, whose 1994 debut Dummy became a landmark record of its decade.
Behind the marina and the new Port Marine housing, its working economy still runs on engineering, food production and the fabrication trades, much of it in the units off Harbour Road and Old Mill Road and at Portishead Business Park close to Junction 19 of the M5.
Every Portishead process that gives off fume, dust, mist or vapour falls under COSHH, which requires the contamination held at source by local exhaust ventilation and that LEV thoroughly examined and tested at least every fourteen months. We test right across the site, from the Portishead Business Park plant to the single-bench Portishead units, logging capture and face-velocity figures and returning a clear pass-or-remedial outcome with each hood identified and labelled.
By sector
Any system that draws fume, dust, mist or vapour off at source counts as LEV, and across Portishead and the rest of Somerset it is the evidence COSHH expects you to hold.
Oil-mist and coolant-mist extraction on CNC machining centres and turning shops in the units at Portishead Business Park and off Old Mill Road, where fine airborne mist has to be captured at the machine before it reaches the operator.
Steam canopies, flour-dust control and process extraction in the bakeries, kitchens and food units serving the town's marina restaurants and its growing population.
Fine-dust extraction and downdraught tables at Portishead cabinet shops and joinery works, where hardwood and MDF dust is captured at the tool before it reaches the lungs.
On-torch extraction, fume arms and downdraught benches across the Harbour Road and Old Mill Road industrial units. Since the HSE's 2019 reclassification, all welding fume - mild steel included - is treated as carcinogenic.
Spray-booth and prep-bay extraction at Portishead bodyshops and the vehicle units near the marina approach roads. 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 the laboratories and technical firms working out of the town business units, to the containment their work demands.
On the ground in Portishead
We are out under Portishead's extraction every week. The proof that matters is the jobs, not a stock photo.
On the electronics benches at a privately owned workshop in Portishead the solder-fume extraction had gone weak, which came down to debris packed into the ducting. We took benchmark readings, visualised the capture at each hood and cleared the unsealed joint we found along the way. With the loose joint sorted every point passed on re-test and the shop had a full LEV report for its COSHH file. The workshop manager also went away with a short photo report for their compliance records.
The test
An HSG258 statutory LEV test goes well beyond a walk-round look. On a Portishead system it has to establish three things - that the plant and ductwork are sound, that the hoods still capture, and that the capture still meets the figure the system was designed around.
Ductwork, hoods, filters, fans and dampers checked for damage, blockage and leakage across the Portishead 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 Portishead line.
Where exposure is in question - a precision engineering and manufacturing process, say - sampling confirms whether control is actually protecting the people at the process.
The duty
COSHH Regulation 9 makes it plain: any LEV controlling exposure to a hazardous substance has to be thoroughly examined and tested at intervals no greater than fourteen months, and the resulting records kept for at least five years.
On most Portishead sites - the Portishead Business Park units and the smaller workshops alike - it is the fourteen-month clock that bites: let it lapse and the system is non-compliant that day, however well it seems to run. We examine it, tag each hood with its status and next-due date, and hand over the report an HSE inspector or insurer will want. Where something fails you get the reading, the cause and the remedy - never just a red sticker.
How it runs
Full visual and structural check of every hood, duct run, filter and fan across the Portishead 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 Portishead duty-holder.
Each system tagged with status and next-due date, so compliance is visible on the the Harbour Road industrial estate 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 precision engineering and manufacturing bay, a food and drink production bench and a lab fume cupboard can each sit on a different interval - we set the right one for every system.
Yes - the industrial estates and workshops around Portishead Business Park and the Harbour Road industrial estate, the university and hospital labs, and the wider Somerset.
Yes. A new spray booth or fume-arm install at a Portishead 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 Portishead Business Park unit will ask to see.
precision engineering, food and drink production, woodworking and joinery, welding and fabrication, vehicle body and paint, and laboratory fume cupboards - the trades clustered around Portishead Business Park and the Harbour Road industrial estate and across the wider Somerset.
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 Portishead 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.
Yes. We plan testing around production shifts at the Portishead Business Park units, term-time access at the Portishead university labs, and normal hours at smaller workshops, so the examination never stops the line.
Local knowledge
Construction of Portishead A power station began in 1926 and it was generating electricity for Bristol by 1929, joined by the larger B station in 1955, both burning coal hauled in through the town's deep-water dock. The stations closed in 1980 and their chimneys came down in 1992, and the site is now the marina and Port Marine housing, but the engineering trades they once drew still work across the town. Every machine shop and fabrication bay carries a duty to control the mist, fume and dust its work throws off. We test and certify local exhaust ventilation against its design figures, so the extraction reads true.
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