Environment and Conservation Minister Tom Hedderson says an assessment of human health and ecological risks at the site in New Harbour is now complete.
Hedderson says the government is confident it has addressed any concerns and eliminated any potential risks to human or environmental health.
The site was closed to dumping in 2009.
The government has spent $1.8 million over the past three years on the remediation project.
The last phase includes installing a cap to isolate and contain any PCB-impacted soil.
A tender will soon be issued for the final phase, with the project expected to wrap up by the end of the year.