| Principal Investigator: | Krizan, Julia (14) |
| Licence Number: | 16200 |
| Organization: | IMG-Golder Corporation |
| Licensed Year(s): |
2019
2018
2017
2016
2015
2013
2011
2010
|
| Issued: | Jan 10, 2018 |
| Project Team: | Julia Krizan, Toivo Pallop, Paul DeWaele, Kevin Rattray, Andy Myers, Chris Barr, Dave Pritchard, Maurice Balych, Vaughn Gouws, Eric Crawford |
Objective(s): To remove and dispose of exposed solid waste (including barrels, batteries, debris, wood, other waste and an existing building); and, to construct a contaminated soil and waste containment structure to contain impacted soil excavated from areas at the site.
Project Description: The objectives of the Site Remediation Program (scheduled to be completed in 2018) are to: 1. Remove and dispose of exposed solid waste (including barrels, batteries, debris, wood, other waste and an existing building); and, 2. Construct a contaminated soil and waste containment structure to contain impacted soil excavated from areas at the site. The 2018 Site activities will include several investigations in support of the remediation program: Thermal Monitoring – In 2017, thermistor strings were started to be installed in the footprint of the containment structure to facilitate remote temperature monitoring at different areas and depth intervals. The installation will be completed and a background cable will also be installed to record temperatures outside of the containment structure. Confirmatory Soil Sampling - Previously identified contaminated soil was excavated from the active layer beyond the footprint of the containment structure and relocated to the containment structure. Confirmatory soil sampling was performed before excavation areas were back-filled with clean material. Additional delineation sampling took place and more soil will be excavated and relocated to the containment structure in 2018. Confirmatory soil sampling will again be performed before new excavation areas will be filled with clean material. Groundwater Sampling - Four monitoring wells will be installed around the perimeter of the containment structure to analyze groundwater in 2018 and during several post-construction monitoring Site visits as per Inuvialuit Water Board requirements. Background Soil Sampling - Soil sampling locations will be established within a two to four metre radius of each of the monitoring wells - for each location, two samples will be collected (one shallow, one deep) and analyzed. Topographic Survey – As was done in 2017 prior to begin of the construction, a topographic survey will be conducted at the containment structure and the borrow areas. The survey will be completed upon completion of all construction and borrow activities. It will capture the layout of ground control points for the UAV survey. The survey will also be used to determine the installation of permanent bench marks. The monitoring wells and environmental sample locations will be tied in. UAV Survey Field Program – A low altitude UAV survey of the containment structure, the borrow areas and ground control points will be performed again. At the end of the 2017 field season, heavy equipment and some camp supplies were securely stored at the camp sites over winter. In June 2018, some materials and supplies, additional camp components and the field crew will be mobilized through Mould Bay to Satellite Bay to complete the remediation project. Two temporary camps will again be established, one at each site. The 2018 work will include the completion of the containment structure with a thermal cover at the site. The thermal cover will provide a cap on the contaminated material that is sufficiently thick (approximately 2.4 m) to contain estimated seasonal thawing within the cap, thereby ensuring that all buried waste and contaminated soils remain at ground temperatures less than 0°C. The construction will also include again the development and short-duration operation of a borrow pit, designed to maintain positive drainage, avoid the creation of water collection points and maintain excavation geometry to facilitate the later grading and re-contouring. The duration of the planned 2018 project will be approximately 8 weeks in July and August. Two temporary camps will be required. One 20-person, temporary camp will first be established at Mould Bay to be used during mobilization and demobilization phases of the project. It is anticipated that this camp will not be utilized during the construction phase. One 24-person temporary camp will then be established at Satellite Bay for approximately 6 weeks during construction activities. Approximately 22 staff are expected on site at any given time. Clifton will be the General and Principal Contractor coordinating all on-site activities and responsible for health and safety. Golder will be ROGCI's primary researcher for all engineering work and associated construction. ROGCI will engage various other (sub) contractors to complete the work and associated construction of the containment structure. As in previous project-related research at the site, upon completion of the program, ROCGI will submit a follow-up report to the Hunters and Trappers Committees of Sachs Harbour and Ulukhaktok, the Government of the Northwest Territories Lands Department, Indigenous and Northern Affairs Canada, the Inuvialuit Water Board and the Aurora Research Institute. This will include a plain language summary of investigation findings. The fieldwork for this study will be conducted from June 1, 2018 to October 31, 2018.
