conversion tracking


EDR – GOVERNMENT – Building Modification
Phase One & Two Environmental Site Assessment

Client’s Issues and Needs

Building modification and additions were being planned for a historic property dating back to the 1850s. This property has considerable heritage value, and is an integral part of the community. As part of the proposed construction activities, Pinchin completed a Phase I Environmental Site Assessment, (ESA), Phase Two ESA and Remedial Options Evaluation.

Results of the ESAs indicated that petroleum hydrocarbons (PHCs) in soil near underground storage tank (UST) were present at concentrations above the Ontario Ministry of the Environment’s Applicable Site Conditions Standards. The ESA also identified the presence of elevated concentrations of polynuclear aromatic hydrocarbons (PAHs) above the Ontario Ministry of the Environment’s Applicable Site Conditions Standards within the exterior portions of the Site, as a result of building fires which destroyed a portion of the Site buildings in the late 1890s.

Our Services and Solutions

Pinchin completed a Phase One ESA and Phase Two ESA, in accordance with the more detailed requirements stipulated in the recent amendments to Ontario Regulation 150/04 (as amended) as requested by the client. In conjunction with these activities, a designed substances survey was also conducted by Pinchin’s Hazardous Materials Group.

Based on the findings of the Phase One ESA, Pinchin prepared a work plan for a Phase Two ESA which included geophysical surveying, borehole drilling, monitoring well installation and soil and groundwater sampling. Based on the Phase Two ESA findings, Pinchin prepared a detailed recommendations letter which presented recommended approaches for remedial and risk management options as well as planning -level cost estimates for remediating or mitigating contaminants identified. Proposed options included in-situ and ex-situ soil and groundwater remediation options, risk assessment, and monitored natural attenuation. Among the recommended approaches were source removal (including UST and associated contaminated soil removal), risk assessment and monitored natural attenuation.


Pinchin completed the ESA activities within a 3 month timeframe and delivered the project on-budget. Due to the expedited timeframe for ESA activities, the Client was able to successfully move ahead with the planned construction activities on-schedule.

Project Highlights

Key Features:

Environmental Site Assessment
Conceptual Planning for an In-situ Bioremediation with Groundwater Recirculation
Heritage site
Designated substance consulting