Walthamstow · COSHH / HSG258
Statutory thorough examination and testing of local exhaust ventilation for Walthamstow workshops and production sites, keeping fume and dust control compliant with COSHH and HSE guidance HSG258.
Walthamstow
Walthamstow is a north-east London district in Waltham Forest, a borough of around 278,000, home to a street market promoted as the longest daily market in Europe and the Blackhorse Lane brewery cluster.
The work is food and drink and light industry - the Blackhorse Lane breweries and food producers, the light engineering and fabrication, and the printing and maker workshops - across the Blackhorse Lane and Argall Avenue estates, with the bodyshops between them.
Every Walthamstow 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 Blackhorse Lane plant to the single-bench Walthamstow units, logging capture and face-velocity figures and returning a clear pass-or-remedial outcome with each hood identified and labelled.
By sector
A system that catches fume, dust, mist or vapour at the point it is released is LEV, and for Walthamstow employers and others across Greater London it is the record COSHH looks for first.
Steam, CO2 and mist extraction across the Blackhorse Lane breweries and food producers, where process vapour and organic dust need capture at source.
Grinding, machining and fume extraction across the light-engineering and fabrication units, where metal dust and mist need capture proven.
Solvent, ink-mist and dust extraction across the print and maker workshops, where VOC vapour and dust need capture at source.
On-torch extraction, fume arms and downdraught benches across the Blackhorse Lane and Argall Avenue units. Since the HSE's 2019 reclassification, all welding fume - mild steel included - is treated as carcinogenic.
Spray-booth and prep-bay extraction at Walthamstow 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 the local college and Whipps Cross University Hospital, to the containment their work demands.
On the ground in Walthamstow
We are out under Walthamstow's extraction every week. The proof that matters is the jobs, not a stock photo.
A metal fabrication and welding yard in Walthamstow had a mobile welding-fume filter unit fitted with the wrong, generic cartridge - it did not seat properly and left a 10mm bypass gap. We removed the incorrect filter, fitted a temporary foam seal gasket to verify the flow was there and measured the nozzle capture velocity. It failed on the incorrect filter installation letting weld particulate bypass the filtration bed. The workshop was packed with active arc-welding bays, so auto-darkening goggles were worn throughout.
The test
An HSG258 statutory LEV test goes well beyond a walk-round look. On a Walthamstow 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 Blackhorse Lane 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 Walthamstow line.
Where exposure is in question - a food and drink manufacturing process, say - sampling confirms whether control is actually protecting the people at the process.
The duty
The duty is written into COSHH Regulation 9: where LEV controls a hazardous substance, the employer must have it thoroughly examined and tested at least every fourteen months and keep the records for five years.
For most Walthamstow sites - from the Blackhorse Lane 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 Walthamstow 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 Walthamstow duty-holder.
Each system tagged with status and next-due date, so compliance is visible on the Argall Avenue 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 food and drink manufacturing bay, a light engineering and fabrication 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 Blackhorse Lane and Argall Avenue, the university and hospital labs, and the wider Greater London.
Yes. We plan testing around production shifts at the Blackhorse Lane units, term-time access at the Walthamstow university labs, and normal hours at smaller workshops, so the examination never stops the line.
Food and drink manufacturing, light engineering and fabrication, printing and maker workshops, welding and fabrication, vehicle body and paint, and the labs of the college and hospital - the trades clustered around Blackhorse Lane and Argall Avenue and across the wider Greater London.
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 Walthamstow, but a Blackhorse Lane fabrication shop and a High Street canopy are kept as the separate jobs they are.
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 Blackhorse Lane production line we can usually fit the re-test around your shifts. We will not pass a system that does not control exposure.
Yes. A new spray booth or fume-arm install at a Walthamstow 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.
Phoenix Duct Clean · by the numbers
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