According to the US Environmental Protection Agency (EPA), the company has agreed to pay civil penalty of $172,900 to resolve the issue.
The agreement dissolves the firm’s alleged violation of the risk management provisions of the Clean Air Act.
Under this act, the firms have to develop and implement a risk management plan, if the facilities store chemicals in amounts exceeding regulatory thresholds.
The Hamilton facility was subjected to the risk management provisions of the Clean Air Act, as its on-site quantity of chloroform, a toxic chemical, exceeded the regulatory threshold of £20,000.
EPA enforcement program director Suzanne Bohan said that GSK has cooperated with the EPA in resolving this matter and submitted a viable plan earlier this year.
"Risk management plans protect communities by ensuring facilities have up-to-date procedures in place to prevent and respond to potential releases of the toxic chemicals they use," Bohan added.