Between 2010 and 2012, TBT Engineering was commissioned by the Ministry of Transportation (Northwestern Region) to assess the current environmental conditions at twenty-two (22) highway maintenance patrol yards and/or sub-patrol yards, typically consisting of a garage/office complex, treated sand dome, salt shed and various outbuildings.
The objective of the work was to establish baseline environmental conditions before contractor operations began, so that future comparisons of the site conditions could be made. These current conditions where compared to existing data if available. TBT Engineering also identified potential sources of hydrocarbon and/or salt contamination and historical waste deposition, assessed potential liabilities, and provided recommendations for remediation and/or future management of the lands.
Phase I ESA updates where completed for all yards. At each of the sites requiring complete Phase I ESAs, the Consultant also carried out electromagnetic surveys to determine the possible locations of subsurface anomalies. Phase II ESAs where then completed for appropriate sites based on Phase I ESA results. Site activities where supervised at all times by field staff experienced in completion of Phase I/II ESAs and the project was completed by or supervised by a qualified person, as defined in O.Reg. 153/04 made under the Environmental Protection Act. All samples were collected in accordance with the Ministry of Environment’s Guidance on Sampling and Analytical Methods for Use at Contaminated Sites (1996).