Officials are looking for more information from a company that wants to store waste from nuclear power plants underground – less than a mile from Lake Huron.

The Canadian Environmental Assessment Agency has sent a letter to Ontario Power Generation – which has proposed burying low- and intermediate-level waste such as clothing and discarded machinery – more than 2,000 feet underground.

The company wants to bury the material at a site at the Bruce Power Generating Station near Kincardine, Ontario – but at the request of the government – it offered two alternative sites.

In its 17-page letter the agency asked for more detail about how the alternative sites were chosen – and it raised questions about rock stability –  and factors such as radiological risks during transportation – and the  chance of accidents.