Canadian Pacific Railway says it expects the last of its damaged cars will be removed by the end of the week from the site of a fiery derailment in Saskatchewan.
It also said in an email that staff have started scraping contaminated soil from the area, which is to be hauled away in the coming days.
The Transportation Safety Board has said about 19 cars were breached and emptied of their loads, releasing 1.5 million litres of oil.
The spill sparked a large fire, which burned for about 24 hours.
CP Rail said it will implement a soil remediation plan based on the tests being done by its environmental experts in consultation with the province.
It said the duration of the work will partially depend on the weather.