WorkSafe confirmed last week that the incident had been reported to them, and a spokeswoman said yesterday afternoon that it was still making inquiries into the matter and had not decided what the next steps would be.
The use of methyl bromide - a toxin linked to motor neurone disease among other ailments - at the port has been controversial, and an Environment Court ruling last year was heavily critical of its use at the port.
The Tauranga Moana Fumigant Action Group, which formed last year, said this week that it is extremely concerned about the latest incident report and wants answers from the authorities and commercial entities involved about what happened.