Prior to beginning construction, the WTS was well aware that the Warwick site had soil contamination.
From the 2009 Final Scoping Document:
E.2.e. Potential soil contamination; the applicant desires to reference potential soil contamination information from the previously approved DEIS for The King’s College. An Environmental Site Assessment (ESA) was performed by The Kings College and some of the noted areas of concern were mitigated. Further work was done on the site by Touro College under their ownership. Another ESA was performed for Watchtower when the property was purchased. To some extent, the current information disclosed in the ESA should be referenced in this section. The ESAs should be included in an Appendix to the DEIS and the location of any remaining areas of concern should be shown on a plan included in the document. Any additional mitigation should be noted in section E.2.i.
From the 2012 Findings Statement:
An Environmental Site Assessment (ESA) conducted on the site indicated a number of areas of concern including former underground storage tanks, potential subsurface contamination due to waste sewerage piping, potential subsurface contamination due to filter sand beds from the sewage treatment plant in a nearby wooded area, the sewage treatment plant, a former drum storage area and potential subsurface contamination due to historic operations at the former INCO facility. There are four areas of potential soil contamination contamination that are identified on the site. Each of these four areas will be remediated prior to the start of site construction.