By workplace & process
Charging batteries and handling chemicals can release acid mist, lead and metal-oxide dusts - some of them carcinogenic. Why the LEV here sits under two legal regimes at once, and what its test has to confirm.
The short answer
Battery and chemical handling produces exposures that are easy to underestimate: sulphuric acid mist from charging, lead dust and fume, and, in newer cell chemistries, metal-oxide dusts and process solvents. Some of these are carcinogens or sensitisers, and lead brings its own legal regime on top of COSHH. Local exhaust ventilation captures at the point sources, and its test proves that capture holds.
The detail
In lead-acid work, charging and formation can generate sulphuric acid mist. Strong inorganic acid mist containing sulphuric acid is a recognised human carcinogen linked to cancer of the larynx and lung, as well as being corrosive and causing tooth erosion. Lead itself is controlled not under COSHH but under the Control of Lead at Work Regulations, which add blood-lead monitoring and suspension levels - so a single site can sit under two regimes at once.
Newer battery chemistries change the hazard rather than remove it. Electrode manufacture and recycling involve metal-oxide dusts such as cobalt, nickel and manganese, several of which are respiratory sensitisers or carcinogens, along with process solvents. General chemical handling - decanting, dispensing and mixing - adds vapour, mist and dust of its own. The common thread is that all of these are generated at identifiable points where capture can be applied. In practice the largest emissions come at defined moments - a battery bank gassing near the end of charge, an acid being decanted, a powder being mixed - so the capture is designed around those events and has to be present exactly where and when they happen. And because acid mist corrodes the very ducts and fans meant to remove it, a system that performed on commissioning can quietly lose that performance, which is precisely what a test is there to catch.
What it means for you
A thorough examination and test of battery and chemical-handling LEV confirms that capture at the charge banks and formation area, at decanting and dispensing, and at mixing is drawing mist, fume and dust away at source and moving air at the commissioned rate. Corrosive mist is hard on the extraction itself, so ducts, fans and filters degrade, and the examiner checks performance against the design at least every fourteen months with user checks between.
Where lead is present, the LEV test sits alongside the biological monitoring the lead regulations require - the two are complementary, not interchangeable. Proving that each source capture still performs, rather than assuming a system installed years ago is coping with corrosive service, is what keeps this kind of workplace safe.
The service behind the guide
We test battery and chemical-handling LEV at charge banks, decanting and mixing against the acid mist, lead and metal dusts it has to control, with a clear report.
Questions
Charging and formation can generate sulphuric acid mist, and strong inorganic acid mist containing sulphuric acid is a known human carcinogen linked to laryngeal and lung cancer. Lead dust and fume are a separate, serious hazard.
The acid mist and most chemical exposures fall under COSHH, but lead is controlled under the Control of Lead at Work Regulations, which add blood-lead monitoring and suspension levels. Both can apply on the same site.
Lithium and other cell chemistries bring electrode metal-oxide dusts - cobalt, nickel and manganese among them, several of them sensitisers or carcinogens - plus process solvents. These are captured at coating, mixing and decanting.
At the point sources: charge banks and formation, decanting and dispensing, and mixing. That is where mist, fume and dust are generated, and where capture has to be proven to work.
At least every fourteen months under COSHH, with user checks between, and lead work carries its own monitoring duties. The test confirms capture is holding at each source.
Phoenix Duct Clean · by the numbers
We test battery and chemical-handling LEV at charge banks, decanting and mixing against the acid mist, lead and metal dusts it has to control, with a clear report.