Phoenix Journal · LEV Testing
A cramped urban yard does not lower the bar for extraction - it just makes the engineering harder. Here is how one small workshop lost its welding bay to a prohibition notice, and the order in which to put it right.
LEV testing
The prohibition notice went up on a Friday afternoon, and by then the welding bay had already been shut for three hours - the inspector would not let a single arc be struck until the extraction was put right.
Picture a three-bay motor workshop crammed onto a narrow yard, hemmed in by a terraced row on one side and a railway arch on the other. There is barely room to swing a van door, let alone install a full ventilation plant. Over a couple of busy years the business had drifted from servicing into bodywork and welding repairs, running diesel vans on the ramps to chase faults and doing more MIG welding on mild steel panels than anyone had planned for.
The kit was all there, technically. A tailpipe extraction hose sat coiled on a reel by the far ramp. A portable weld fume extractor stood in the corner with its arm folded away. On paper, the site had local exhaust ventilation. In practice, the reel nozzle did not fit half the exhausts that came through the door, so it was left dangling on the floor while engines idled. The portable extractor's filter had clogged solid months earlier and nobody had cleared it. And because a neighbour kept complaining about noise and cold draughts, the roller shutter stayed down through most of the working day - so the one thing keeping fume moving, the open door, was shut.
The trigger was ordinary. An apprentice went to the doctor with a cough that would not shift, mentioned the welding, and a complaint reached the enforcing authority. When the inspector arrived, the questions were quick and the answers were thin. When was the extraction last thoroughly examined and tested? Nobody knew. Where were the records? There weren't any. What was the capture velocity at the weld? Nobody had ever measured it. The welding stopped that afternoon, and the Fee for Intervention clock started ticking.
It is tempting to treat a cramped urban yard as a special case, as if the rules bend when the building is old and the boundary is tight. They do not. The law that bites here is the Control of Substances Hazardous to Health Regulations, and specifically Regulation 9, which requires any engineering control like LEV to be thoroughly examined and tested by a competent person at least every 14 months. There is no small-site exemption, and no allowance for "we meant to get round to it".
Two of the substances in that workshop are among the most serious you will meet in vehicle work. Diesel engine exhaust emissions are classed by the International Agency for Research on Cancer as a Group 1 human carcinogen, linked to lung and bladder cancer, and they carry nitrogen dioxide (NO₂) and fine soot deep into the lungs. Mild steel welding fume was reclassified as a human carcinogen too, and in February 2019 the enforcing authority changed its position: general ventilation is no longer accepted as adequate control for any indoor welding, however brief. Suitable engineering controls - LEV - are now expected as a baseline, backed by respiratory protection where the fume is not fully captured.
None of this needs a cavernous unit to satisfy. It needs the right hood in the right place, moving air at the right speed, checked on a schedule and written down. A tight site changes the engineering, not the duty.
Strip the story back and the failures were not exotic. They are the same handful that turn up on cramped sites again and again.
There was a quieter hazard sitting alongside the fume, too. The same panel work meant hours on angle grinders and air tools, and hand-arm vibration is exactly the kind of slow injury a busy workshop stops noticing until the damage is done. A tight site tends to concentrate every exposure into the same few square metres, which is precisely why control has to be deliberate rather than assumed.
Getting a workshop like this back to compliant is not a rebuild. It is a sequence, and it starts with finding out where you actually stand rather than guessing.
The engineering answer on a constrained yard is almost always about getting the capture point closer, not about installing bigger plant. A short, well-positioned hood moving the right volume of air beats a distant, oversized fan every time, and it uses less energy and less space doing it. Ducting can be routed along walls and through arches; extractors can be sized to the bays you have. The point is that a small footprint is a design brief, not a reason to skip control.
Once the system is right, staying compliant is mostly discipline. The 14-month examination is a legal minimum, not a target - if a filter or fan is under strain, more frequent checks make sense. Keep the logbook current, act on the daily checks, and treat the annual test as the moment to confirm what your own monitoring has already told you. A workshop that does this rarely sees an inspector reach for a notice, because the evidence of control is sitting on the shelf ready to show.
Questions
At least once every 14 months, under Regulation 9 of the Control of Substances Hazardous to Health Regulations. That is a legal maximum, not a target - if a filter or fan is under strain, or the process is dusty or heavy, more frequent examination can be appropriate. The test must be carried out by a competent person and the report kept for at least five years.
No. Since the enforcing authority strengthened its position in February 2019, general ventilation or an open door is no longer accepted as adequate control for any indoor welding, however brief, because mild steel welding fume is now treated as a human carcinogen. You need suitable engineering control such as local exhaust ventilation at source, supplemented by properly face-fit tested respiratory protection where fume is not fully captured.
A tight site changes the engineering, not the duty. The answer is usually to get the capture point closer to the work rather than installing a bigger fan - a short, well-positioned hood moving the right volume of air outperforms a distant oversized one. Tailpipe extraction with correctly fitting nozzles, on-torch or fixed weld fume capture, and a planned make-up air supply so you are not relying on an open door will control exposure in a very small footprint.
Phoenix Duct Clean · by the numbers
Phoenix examines and tests local exhaust ventilation to HSG258 and COSHH - measured, reported and certificated, UK-wide.