Upper East Village

Toronto, Ontario, Canada.

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Phase One & Phase Two Environmental Site Assessments (ESA)

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As part of the environmental due diligence for the redevelopment of 100A Vanderhoof Avenue, ASC Environmental conducted both Phase One and Phase Two Environmental Site Assessments. The Phase One ESA focused on historical research to identify any potentially contaminating activities (PCAs) associated with the site’s long industrial and commercial history, including former wallpaper manufacturing, fuel storage, and solvent use. Once key areas of concern were identified, the Phase Two ESA was initiated, involving extensive fieldwork including drilling, monitoring well installation, and sampling of soil and groundwater. Through lab analysis of these samples, we were able to characterize contamination across the site and evaluate the risks posed by petroleum hydrocarbons, volatile organic compounds, heavy metals, and other contaminants of concern. Together, these assessments established a clear environmental profile of the property and laid the groundwork for safe and compliant redevelopment.

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Record of Site Condition (RSC) Preparation

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In support of the City of Toronto’s plans to repurpose the site for community infrastructure, ASC Environmental prepared a complete Record of Site Condition (RSC) in accordance with Ontario Regulation 153/04. This process required meticulous documentation, including analytical results, historical site data, regulatory standards comparisons, and supporting maps, all compiled into a submission-ready report for review by the Ministry of the Environment, Conservation and Parks (MECP). Our team ensured that every aspect of the site’s environmental condition was addressed, demonstrating compliance with Table 3 Site Condition Standards for community land use. By doing so, ASC enabled the property owner to move forward with development plans, confident that the site met all environmental safety and reporting obligations.

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Conceptual Site Modelling (CSM)

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ASC developed a detailed Conceptual Site Model (CSM) to visualize and communicate how contaminants are distributed throughout the property and how they might move through the environment over time. This model drew from both our fieldwork and lab findings to map soil and groundwater conditions, illustrate potential exposure pathways, and assess risks to human and ecological health. Hydrogeological cross-sections, groundwater flow maps, and receptor pathway diagrams were included to provide a clear understanding of the site's subsurface dynamics. The CSM was critical not only for risk communication and compliance but also for supporting decision-making around remediation strategies, construction safety, and long-term land use planning.​