The employer objected to the WSIB's initial decision allowing the worker's claim for Idiopathic Parkinson's Disease, which had been attributed to moderate workplace exposure to N-Hexane and welding fumes containing manganese over 20 years.
At the hearing, expert medical and toxicological evidence demonstrated that the worker's exposures were low and below threshold limit values.
Furthermore, the scientific literature links such exposures to Parkinsonism and Manganism, not Idiopathic Parkinson's Disease.
The Appeals Resolution Officer concluded there was no causal relationship between the workplace exposures and the worker's condition, granted the employer's objection, and overturned the allowance of the claim.