Hi-Tech Products Ltd in Swadlingcote, Derbyshire experienced serious problems with carbon monoxide poisoning on the 10th Feb 2011.
One Thursday lunchtime, four members of the factory started to feel unwell, with the office workers starting to feel ill as well minutes later. The company suspected some form of CO poisoning and rang the gas supplier who sent an engineer within one hour.
The engineer checked the back of the gas-powered forklift and a gas heater but could not find any trace of carbon monoxide. Despite not finding any carbon monoxide he still switched the mains gas supply to the heater off. The company continued to use the forklift truck.
The symptoms of CO poisoning got so bad that one lady had to be taken to A+E and a gentleman had to go to the health clinic. Everybody else felt nauseous. The following day staff felt a little better. To play safe the company bought a Kidde carbon monoxide detector which started alarming straight after its installation. To double check the result, the alarm was taken outside into fresh air where the detector stopped alarming. The alarm started again when the CO detector was taken back into the building.
The gas supplier was called back in and could still not find any carbon monoxide present. The company then organised another carbon monoxide detector from a different brand and again, the alarm was immediately triggered. As a result of this Hi-tech contacted the environmental department of the local council who arranged for the fire brigade to come out and measure the CO levels.
The fire brigade successfully detected the CO gas and narrowed the source down to the forklift where 1000ppm were measured. This level is highly dangerous in closed buidlings. Hi-tech immediately had the forklift serviced which reduced the output of carbon monoxide greatly but still did not get rid of all CO gas emissions. If the roller doors to the factory are closed, the Kidde alarm will still go into alarm. The company temporarily resolved the problem by leaving the roller doors open during working hours and by installing another two CO alarms. Hi-tech are now considering changing to an electrical forklift truck. Since these measures were introduced no further health issues were reported.