Charging Bay: Scorched Plug, Acid Puddle and Failed Extraction
The battery charging bay is a covered area beside the packing line. A 48 V lead-acid battery in a counterbalance truck is at about 20% state of charge. The bay's extraction fan has a 'do not use' tag because it failed its check, and the area smells faintly of acid. The charging plug has a black scorch mark on one pin. The battery electrolyte is just below the low-level mark. A 2-litre puddle of clear liquid sits under the battery rack; a pallet of cardboard is stored 1 m away. You are wearing safety glasses and nitrile gloves, but no face shield or apron. A colleague is smoking about 5 m away, outside the marked bay but upwind. The shift ends in 30 minutes, and the truck is needed for a 06:00 start.
1. Do you connect the battery to the charger? Explain your immediate actions.
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No - I would not charge in these conditions. The extraction fan is tagged out, so hydrogen from gassing could accumulate. The acid smell and puddle suggest a leak or spill, and the scorched plug pin indicates overheating or arcing. The electrolyte is below the low mark, which may expose the plates and cause damage or overheating if charged. I would switch off and isolate the charger, tag it, stop the colleague from smoking, ventilate the area if safe, and report the fan, plug, spill and battery condition immediately. I would not plug in the connector or switch on the charger. The truck should be left in a safe parked position with forks down, neutral, parking brake on and key removed, and the 06:00 requirement should be met with another truck or a maintained battery.
2. Describe the spill response and the PPE you would need before dealing with the puddle.
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I would treat the clear liquid as acid until confirmed. I would keep people away, remove the cardboard pallet from the area, and not touch the puddle with nitrile gloves alone. I would get the acid spill kit and wear a face shield, chemical apron, acid-resistant gloves and boots. I would use the site's neutralising agent according to its instructions - commonly sodium bicarbonate - and avoid mixing unknown chemicals. I would contain the spill from the outside in, absorb it with the correct spill medium, bag and label the waste, and clean the area. If any acid contacted skin or eyes, I would flush with water for at least 15 minutes and seek medical advice. The battery should not be charged or watered until a competent person has checked it.
3. What end-of-shift handover information must be recorded?
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I would record the battery's state of charge, the low electrolyte level, the acid puddle and its location, the scorched charging plug, the failed extraction fan, and the action taken, including isolation and tagging. I would name the person notified and the time. I would note that the truck is not available for the 06:00 start unless the charger, plug, fan and battery are cleared by a competent person. I would also record that the battery must not be topped up with tap water and that any watering must follow the manufacturer's procedure, usually after charging unless the plates are exposed. The handover should make clear who owns the next action, so the defect is not lost between shifts.