A Whanganui forklift driver was exposed to potentially deadly gas during a leak at Tasman Tanning.
The driver lost consciousness twice after being exposed to hydrogen sulphide, and suffered concussion and gashes to the face.
The gas leak at the Whanganui tannery in Heads Rd happened in April last year.
And on Friday, in the Whanganui District Court, Tasman Tanning was fined $380,000 for breaches of safety.
The prosecution was brought by WorkSafe NZ which cited multiple failings by the company, which was also ordered to pay $18,000 in compensation to the forklift driver.
WorkSafe chief inspector Keith Stewart said the investigation into the incident found numerous failings, including a lack of training and warnings, and failure to provide personal gas monitors.