For some sites you can risk manage the contamination which may or may not require barriers between the contamination and human or environmental receptors. There are numerous type of barriers depending on the exposure pathway and type of contamination. Dockside Green has significant contamination remaining on site that they are risk managing which includes vapor barriers between the remaining contamination and the build envelopes. However, risk management usually requires the removal or reduction of the amount of Hazardous Waste, and the remaining Waste and commercial/industrial level soils are managed in place. If there are Hazardous Waste level soils at depth on the former dry cleaner site, it may be difficult to remove them and this may prevent or make risk management more difficult.
Risk management also requires extensive long term monitoring and possible maintenance so there can be ongoing costs.
I should add that if there is no rezoning/redevelopment or other activity that requires a site profile submission there may not be anything to trigger remediation of the site. I believe this site is the subject of ongoing litigation and MOE is well aware of the site condition.
Edited by IPH, 25 October 2019 - 02:33 PM.