Cole Engineering was retained by York Region to conduct Phase Two Environmental Site Assessments for two (2) properties located at the northeast corner of the intersection of Yonge Street and Major Mackenzie Drive East in Richmond Hill, Ontario (30 Major Mackenzie Drive East and 10015 Yonge Street). This work was conducted to identify and characterize potential environmental concerns pertaining to the Site for due diligence purposes prior to development of the Site for roadway expansion.
The purpose of the study was to investigate the potential for on-site contamination related to areas of potential environmental concern (APECs) identified in the Phase One ESA for the Site, conducted in July 2016. APECs were related to adjacent automobile and tire repair shops and nearby historical service stations.
Based on the recommendations provided in the Phase One ESA, a Phase Two ESA was conducted on the Site. This included the drilling of boreholes, installation of monitoring wells and collection of soil and groundwater samples in areas deemed most likely to be impacted by potentially contaminating activities (PCAs). The analytical program targeted contaminants of concern as identified in the Phase One ESA. It was discovered that exceedances of the applicable site condition standards were identified in soil and groundwater. It was determined that the level of environmental risk associated with the Site was deemed to be low. It was recommended that any surplus soils generated on the Site during any future works should be properly managed and disposed of by contractors.