|Client:||Kaufman Footwear, Ernst & Young Inc., and 410 King Properties Ltd.|
2005 BROWNIE AWARD WINNER: Presented for the Best Small/Medium Scale Project
XCG conducted a comprehensive site-specific risk assessment (SSRA) at the former Kaufman Footwear manufacturing plant in Kitchener, Ontario. Approximately 225,000 litres (50,000 gallons) of naphtha leaked from an underground storage tank (UST) and created a naphtha plume floating on the water table approximately 10 metres (33 feet) below the ground surface. The overburden material consists of a silty sand till. XCG characterized the site through an extensive Phase I ESA followed by several Phase II ESA investigations. The site characterization included the delineation of the extent of free product, dissolved phase, and soil impacts. Following the site characterization, XCG designed and initiated a Multi-Phase Extraction (MPE) system to remediate the free product naphtha beneath the property. In conjunction with the operation of the MPE system, XCG undertook a comprehensive SSRA.
The SSRA assessed the public health and ecological risks associated with all of the potential receptors including on-site workers, off-site workers, and off-site residents. The key pathways of concern were migration of vapour to indoor air and the potential for migration of impacted groundwater to municipal drinking water wells. Simple conservative groundwater modelling indicated that no municipal drinking water wells were at risk.
Project Gallery – Click an image to enlarge.
Ultimately, a risk management plan was implemented to control the potential for migration of vapours to indoor air through the installation of a dedicated vapour extraction system beneath the potentially impacted building. This area-wide SSRA was peer reviewed as required by the MOE protocol and the property was sold to a developer. XCG is currently working with the developer and has completed a Record of Site Condition (RSC) in accordance with Ontario Regulation 153/04 for Phase I and Phase II of the proposed development. The MOE comments provided during the peer review of the SSRA were addressed and the SSRA was acknowledged by the MOE and a Certificate of Property Use (CPU) has been placed on title.