Phase 2 Environmental Site Assessment
Steer Environmental Associates completed a Phase 2 Environmental Site Assessment (ESA) for the City of Nelson at a former hydro-electrical substation in Nelson, BC, for environmental due diligence associated with waste management and subsequent redevelopment of the site.
Steer Environmental reviewed past reports pertaining to the site which identified five (5) areas of environmental concern (APECs) including former transformer oil storage units, long-term fertilizer application, fill materials of unknown origin and quality located on-site, and former local Hall Mines Smelter operations and an underground heating oil storage tank (UST) located off-site. Confirmatory sampling of site soil from shallow testpits and shallow groundwater discharge grab samples were collected and analysed for potential contaminants of concern (PCOCs; LEPH/HEPH, PAHs, PCBs, metals, ammonia, and select anions) associated with the identified APECs. Steer concluded that residual contaminant concentrations in shallow groundwater and soil vapour presented low risk to potential on-site and/or off-site receptors. Although, it was determined that concentrations of cadmium and copper in shallow soil would require a BC Ministry of Environment Soil Relocation Agreement prior to removal to an off-site location other than a permitted facility.