Home / LEV Testing / Guide
LEV testing - illustrative account
This is an illustrative account - a composite, not a specific real business - of a welding shop that didn't take welding fume seriously until a health scare made it real, then turned things around. It shows both the mistake (waiting for a scare) and the recovery (putting in proper source-capture extraction, testing and training). The point isn't the scare - it's what good welding fume control looks like once a shop commits to it. This is general information.
The short answer
This is an illustrative account - a composite for illustration, not a specific real business - of a welding shop that eventually got its welding fume control right, but only after a health scare made the danger real. It's told this way because it shows two things at once: the mistake of waiting for a scare, and what proper welding fume control looks like once a shop commits to it. This is general information, not a depiction of a specific business. Before: fume treated as part of the job. In the before picture, the shop welded indoors with little more than general ventilation - an open door, some natural airflow - and no proper source capture. Welding fume was treated as an unavoidable part of the job, the way it always had been: the welders breathed the fume daily, it hung in the air, and nobody thought much of it. There was no on-torch or on-arm extraction capturing the fume at the arc, no real sense that the fume was a serious hazard. This is a common enough picture - welding fume long treated as just part of welding - and it's exactly the situation that leaves welders exposed. The scare. Then came the scare. A welder developed breathing problems - a persistent cough, breathlessness, or something that prompted a medical concern - that raised the alarm. Suddenly the fume that had been ignored for years was a real, present harm to a real person, someone the shop knew. It brought home what the shop had been doing: exposing its people, day after day, to a fume that's treated as capable of causing cancer and can cause serious respiratory harm. The scare turned an abstract, ignored hazard into a concrete one with a name attached. That's what finally prompted action - which is the cautionary point, because the harm came first and the action second, when it should have been the other way round. The turnaround: proper source capture. To its credit, the shop then took welding fume seriously and put in proper control. The centrepiece was source-capture extraction - on-torch (at the gun) or on-arm (a movable hood positioned near the arc) - that captures the fume at or near the arc, before it reaches the welders' breathing zones, rather than just diluting the general air (the difference between the approaches is covered in the welding-fume-extraction-on-torch-on-arm-or-ambient page). This was the key change: from no real capture, to capturing the fume at source where it's created. So the welders stopped breathing the fume as they worked. Backing it up: RPE, training, maintenance, testing. The shop didn't stop at buying extraction - it backed it up, which is what made the control real. RPE for the welders as a second layer of protection. Training, so the welders actually used the extraction properly - positioning the on-arm hoods close to the arc, not disabling the on-torch capture, understanding why it mattered. Maintenance, to keep the extraction working over time. And thorough examination and testing of the LEV, to confirm it genuinely captured the fume and to keep it proven (as required at least every fourteen months). So the shop built a whole system of control - extraction, protection, training, upkeep and testing - not just a piece of kit. This is what turns 'we bought extraction' into 'the fume is controlled'. The result. The result was that the welders were properly protected: the fume captured at source, backed by RPE, with the welders trained to use it and the system kept working and tested. The shop was controlling the hazard and meeting its duties, and the fume was no longer a daily uncontrolled exposure harming its people. So the story has a good ending - the shop got it right. The lesson: don't wait for the scare. But the real lesson is in the timing. The shop got it right in the end, but the scare was avoidable: it did nothing until a worker was harmed, when it could have put exactly the same controls in place from the start, before anyone's health was affected. Welding fume is a known, serious hazard - treated as capable of causing cancer - so the right time to control it is before it harms anyone, not after a scare forces the issue. A worker paid the price for the delay. So the account is both a model of good control (what the shop did once it committed) and a warning (that it shouldn't have taken a scare to get there). The takeaway. So this illustrative welding shop got its fume control right - proper source-capture extraction, RPE, training, maintenance and testing - but only after a health scare made the danger real. It shows what good welding fume control looks like, and it shows that such control should be put in before a scare, not prompted by one, because welding fume is a known serious hazard and waiting for harm is waiting too long. This is general information, not a depiction of a specific business. This is general information.
Key points
Before: fume as part of the job
In the before picture, the shop welded indoors with little more than general ventilation - an open door, some natural airflow - and no proper source capture. Welding fume was treated as an unavoidable part of the job, the way it always had been: the welders breathed the fume daily, it hung in the air, and nobody thought much of it. There was no on-torch or on-arm extraction capturing the fume at the arc, and no real sense that the fume was a serious hazard rather than just a feature of welding.
This is a common enough picture - welding fume long treated as just part of welding, especially where it always has been - and it's exactly the situation that leaves welders exposed to a fume that's treated as capable of causing cancer. The general ventilation cleared some fume from the wider air over time, but it did nothing to stop the welders breathing the concentrated fume rising from the arc right in front of them. So the shop was, without really registering it, exposing its people daily. This is the situation the scare would eventually expose. So before - fume as part of the job - sets the scene: indoor welding with no real fume control, the hazard unrecognised. The scare that changed it follows. So the shop welded with no real fume control, hazard unnoticed. This is general information. This is general information.
The scare
Then came the scare. A welder developed breathing problems - a persistent cough, breathlessness, or something that prompted a medical concern - that raised the alarm. Suddenly the fume that had been ignored for years was a real, present harm to a real person, someone the shop knew and worked alongside. It brought home what the shop had been doing: exposing its people, day after day, to a fume that's treated as capable of causing cancer and can cause serious respiratory harm.
The scare turned an abstract, ignored hazard into a concrete one with a name and a face attached - which is what finally prompted action. That's the cautionary heart of the story: the harm came first and the action second, when it should have been the other way round. It often takes something like this - a worker falling ill - to make a long-ignored hazard suddenly real to a workplace, which is precisely the problem: the hazard was real all along, and it took harm to a person to make the shop see it. So the scare - a worker's health raised the alarm - is the turning point of the account, and its warning: the danger was always there, but it took a scare to prompt action. The turnaround that followed is next. So it took a worker's illness to make the fume real. This is general information. This is general information.
The turnaround
To its credit, the shop then took welding fume seriously and put in proper control. The centrepiece was source-capture extraction - on-torch (built into the gun) or on-arm (a movable hood positioned near the arc) - that captures the fume at or near the arc, before it reaches the welders' breathing zones, rather than just diluting the general air (the difference between the approaches is covered in the welding-fume-extraction-on-torch-on-arm-or-ambient page).
This was the key change: from no real capture, to capturing the fume at source where it's created. Instead of the fume rising into the welders' faces and being cleared slowly from the general air, it was now drawn away at the arc, so the welders stopped breathing it as they worked. This is the single most important thing the shop did - moving from general ventilation (which doesn't protect the welder at the arc) to source capture (which does). It's the difference between clearing the room and protecting the person. So the turnaround - proper source-capture extraction - is the core of the recovery: the shop put in extraction that actually captures the fume at source, the thing that had been missing. But it didn't stop there, which is what made the control real (next). So the shop put in source capture, catching the fume at the arc. This is general information. This is general information.
Backing it up
The shop didn't stop at buying extraction - it backed it up, which is what made the control real rather than just equipment on the wall. RPE for the welders, as a second layer of protection alongside the extraction. Training, so the welders actually used the extraction properly - positioning the on-arm hoods close to the arc, not disabling the on-torch capture, understanding why it mattered - because extraction only works if it's used right.
Maintenance, to keep the extraction working over time (rather than letting it degrade). And thorough examination and testing of the LEV, to confirm it genuinely captured the fume and to keep it proven (as required at least every fourteen months for such a system). So the shop built a whole system of control - extraction, personal protection, training, upkeep and testing - not just a single piece of kit. This is what turns 'we bought extraction' into 'the fume is genuinely controlled': the extraction captures, the RPE backs it up, the training means it's used right, and the maintenance and testing keep it working and proven. A shop that had bought the extraction but skipped the training, maintenance or testing would not have had real control. So backing it up - RPE, training, maintenance and testing - is what completed the turnaround: the source capture made real by everything around it. The result and the lesson follow. So the shop backed the extraction with RPE, training, upkeep and testing. This is general information. This is general information.
The result and the lesson
The result was that the welders were properly protected: the fume captured at source, backed by RPE, with the welders trained to use it and the system kept working and tested. The shop was controlling the hazard and meeting its duties, and the fume was no longer a daily uncontrolled exposure harming its people. So the story has a genuinely good ending - the shop got it right, and its welders are far better protected than before.
But the real lesson is in the timing. The shop got it right in the end, but the scare was avoidable: it did nothing until a worker was harmed, when it could have put exactly the same controls in place from the start, before anyone's health was affected. Welding fume is a known, serious hazard - treated as capable of causing cancer - so the right time to control it is before it harms anyone, not after a scare forces the issue. A worker paid the price for the delay, and that's the part that shouldn't have happened. So the account is both a model of good control (what the shop did once it committed) and a warning (that it shouldn't have taken a scare to get there). So the result and the lesson - don't wait for the scare - is the account's message: the good control the shop reached is exactly what it, and any welding shop, should put in before a scare, not after one. So put the control in before a worker is harmed, not after. This is general information, not a depiction of a specific business. This is general information.
Questions
No - it's an illustrative account, a composite for illustration rather than a specific real business; the details (the scare, the before-and-after) are a realistic picture used to show what good welding fume control looks like and why it shouldn't take a scare to put it in, not a report of one actual shop. No - this isn't a specific real welding shop. It's an illustrative account: a composite, put together for illustration, rather than a report of one actual business. The purpose of telling it this way is to show, through a realistic and recognisable picture, two things - the mistake of waiting for a health scare before taking welding fume seriously, and what proper welding fume control looks like once a shop commits to it. The situation described (indoor welding with only general ventilation, fume treated as part of the job, a worker's health scare prompting a turnaround to source-capture extraction, RPE, training, maintenance and testing) is realistic and common enough to be recognisable, but the specific shop and worker are illustrative, not real individuals. This matters for honesty: the account is a teaching illustration, not a case report, and shouldn't be read as a claim about a particular business. The underlying facts it illustrates, though, are real: welding fume is treated as capable of causing cancer, source capture protects welders better than general ventilation, and control should be in place before anyone is harmed. So the shop is illustrative, but the lessons are genuine. So no - it's an illustrative composite, used to show the lessons. So no; it's a composite for illustration, not a real business. This is general information. This is general information.
It welded indoors with only general ventilation and no proper source capture, treating welding fume as an unavoidable part of the job rather than a serious hazard - so its welders breathed the fume daily, exposed to a fume treated as capable of causing cancer, with no real control, until a worker's health scare exposed the problem. Before the scare, the shop's mistake was treating welding fume as just part of the job rather than a serious hazard, and controlling it accordingly - which is to say, hardly at all. It welded indoors with little more than general ventilation (an open door, some natural airflow) and no proper source capture: no on-torch or on-arm extraction capturing the fume at the arc. So the welders breathed the fume daily, as it rose from the arc right in front of them, and the general ventilation did nothing to stop that - it cleared some fume from the wider air over time, but didn't protect the welders at the point the fume was created and most concentrated. The deeper error was the mindset: welding fume was seen as an unavoidable feature of welding, the way it always had been, not as a serious health hazard needing proper control. This meant the shop didn't recognise it was exposing its people, day after day, to a fume that's treated as capable of causing cancer and can cause serious respiratory harm. So the shop was under-controlling a known serious hazard, without registering it - the common and dangerous situation of welding fume being normalised as part of the job. It took a worker's health scare to expose that this was a real, harmful exposure. So it treated the fume as normal and left its welders breathing it. So it had no real fume control and treated the fume as unavoidable. This is general information. This is general information.
It put in proper source-capture extraction (on-torch or on-arm) that captures the fume at the arc before it reaches the welders, and backed it up with RPE, training so the extraction was used properly, maintenance, and thorough examination and testing of the LEV - building a whole system of control, not just buying a piece of kit. To fix it, the shop put in proper welding fume control - a whole system, not just one thing. The centrepiece was source-capture extraction: on-torch (built into the gun) or on-arm (a movable hood positioned near the arc) that captures the fume at or near the arc, before it reaches the welders' breathing zones - rather than just diluting the general air as the old ventilation had. This was the key change: from no real capture to capturing the fume at source, so the welders stopped breathing it as they worked. But the shop didn't stop at buying the extraction. It backed it up with: RPE for the welders, as a second layer of protection; training, so the welders actually used the extraction properly (positioning on-arm hoods close to the arc, not disabling on-torch capture); maintenance, to keep the extraction working over time; and thorough examination and testing of the LEV, to confirm it genuinely captured the fume and keep it proven. So it built a complete system - extraction, personal protection, training, upkeep and testing - which is what turned 'we bought extraction' into 'the fume is genuinely controlled'. The result was welders properly protected and the hazard controlled. So it installed source capture and backed it with RPE, training, maintenance and testing. So it put in source capture plus RPE, training, upkeep and testing. This is general information. This is general information.
Because source capture (on-torch or on-arm) catches the fume at or near the arc, before it rises into the welder's breathing zone, whereas general ventilation only clears fume from the wider air after it's spread - by which time the welder has already breathed the concentrated fume at the arc; so source capture protects the welder, general ventilation largely doesn't. Source capture is better than the general ventilation the shop had because of where and when it deals with the fume. General ventilation (an open door, natural airflow, or general extraction) clears fume from the wider workshop air over time, after the fume has already risen from the arc and spread. But the welder stands right over the arc, so they breathe the concentrated fume as it rises into their face - before the general ventilation clears it from the wider area. So general ventilation does little to protect the welder at the point and moment the fume is most concentrated (at the arc, in their breathing zone). Source capture (on-torch, right at the gun, or on-arm, close to the arc) instead catches the fume at or near the arc, as it's created, before it reaches the welder's breathing zone. So the welder doesn't breathe it in the first place. This is the crucial difference: general ventilation clears the room but not the welder's air; source capture protects the welder directly. It follows the general principle that capturing a contaminant at source beats diluting it from the general air after it's spread. Since welding fume is treated as capable of causing cancer, protecting the welder directly (source capture) rather than just clearing the room (general ventilation) is what proper control requires. So source capture protects the welder; general ventilation largely doesn't. So because it catches the fume before the welder breathes it, unlike general ventilation. This is general information. This is general information.
That welding fume control should be put in before a scare, not after one - the shop got it right in the end, but only after a worker was harmed, when it could have put the same controls in place from the start; welding fume is a known serious hazard, so the right time to control it is before anyone's health is affected. The main lesson of the story is about timing: welding fume control should be put in place before a health scare, not prompted by one. The shop got it right in the end - proper source-capture extraction, RPE, training, maintenance and testing - so the story has a good ending. But the scare that prompted it was avoidable. The shop did nothing about the fume until a worker was harmed, when it could have put exactly the same controls in place from the start, before anyone's health was affected. So a worker paid the price - developing breathing problems - for the delay, and that's the part that shouldn't have happened. The deeper point is that welding fume is a known, serious hazard: it's treated as capable of causing cancer, and its harms are well established. So there's no excuse for waiting to see harm before controlling it - the hazard is known in advance, which means the control can and should be in place in advance too. Waiting for a scare means waiting for a worker to be harmed, which is waiting too long. So the account works as both a model (what good welding fume control looks like) and a warning (don't wait for a scare to put it in). The right time to control a known serious hazard is before it harms anyone. So the lesson is: control welding fume before a scare, not after. So don't wait for harm - control the known hazard in advance. This is general information. This is general information.
Yes - the shop's new source-capture extraction is an LEV controlling a fume treated as carcinogenic, so it must be thoroughly examined and tested regularly (at least every 14 months) to confirm it keeps capturing the fume, alongside maintenance and correct use; the testing is part of what made the turnaround real, not just buying the kit. Yes - the shop's new extraction needs ongoing testing, and that testing was part of what made its turnaround real rather than just a purchase. The source-capture extraction the shop put in is an LEV controlling welding fume - a fume treated as capable of causing cancer, a serious health exposure - so it must be thoroughly examined and tested regularly (at least every fourteen months for such a system) to confirm it's still capturing the fume as it should. This matters because extraction degrades over time (worn parts, reduced airflow, wear on hoods and ducting), so a system that captured well when installed can quietly stop doing so - and only testing (which measures the actual capture, not just whether it's running) confirms it's still working. So the testing keeps the control proven over time. It sits alongside the other ongoing needs: maintenance (to keep the extraction working) and correct use (welders positioning on-arm hoods close to the arc, not disabling on-torch capture). Together, testing, maintenance and correct use are what keep the source capture genuinely controlling the fume year after year, rather than degrading into a system that runs but doesn't protect. This is why the shop's testing of its new extraction was important - it's the difference between 'we installed extraction once' and 'the fume stays controlled'. So yes - the extraction needs regular testing to stay a proven control. So yes; it must be tested regularly to confirm it keeps capturing. This is general information. This is general information.
The welding shop's turnaround included testing its new extraction to confirm it genuinely captured the fume - the step that makes source capture real rather than assumed; we thoroughly examine and test welding fume LEV, confirming it captures the fume and keeping it proven, as COSHH requires - and best done before a scare, not after. Ask us to test your welding extraction. This is general information.
