Location of Resolution Island
Resolution Island is located at the south east corner of Baffin Island approximately 200 km from the capital of Nunavut, Iqaluit.
At Resolution Island, Nunavut, a large quantity of PCBs were found to be present at the site in 1993. From 1994 to 1996, work was conducted by the ASU to stabilize the situation. PCB liquids were removed from transformers and safely stored, capacitors were containerised, barriers were designed and constructed in PCB leachate pathways on the land, the whole area was delineated for PCBs and metals and the contents of many barrels were analyzed. The cleanup of the site was managed by the Qikiqtaaluk Corporation (now Qikiqtaaluk Environmental), an Inuit company from Iqaluit.
The weather on Resolution Island is severe and affects all aspects of relating to work at the site. During the cleanup operation. In 1999 a severe ice storm halted excavation for 5 days. The helicopter and heavy machinery were immobilized.
Amongst the problems associated with this type of work is the presence of unwanted visitors! Polar bears are common in some areas and must be treated with respect.
The ASU carried out all of the mapping, sampling and testing at this site.
Setting up the GPS Base Station 2001
In 2000, a mobile laboratory unit was designed, equipped and taken to the island. The 45ft module contains a GC/ECD for PCB's and a GC/FID for TPH analyses, a fume-hood for safe chemical handling, gas generators and cylinders for the GC, vacuum and water chiller units for the rotary evaporator, a shaker unit, associated glassware and solvents, and a whole variety of sampling and safety equipment related to working at a contaminated site. We were able to provide a quick analysis turnaround time with the mobile laboratory and made use of back-up immunoassay test kits when results were required immediately. Sub-samples were routinely sent back to the laboratory in Kingston, as a back-up procedure and for additional QA/QC. The lab was winterized at the end of each season and was in operation from 2000 to 2006 when it was demobilized and used in Iqaluit. The lab worked really well and allowed to ASU to meet all of its sampling and testing requirements.
ASU Mobile Lab at Resolution Island 2000
Barrel testing was a large part of the work on site. Many DEW line sites have thousands of barrels scattered over a large area. The composition of their contents is generally mixtures of fuel, lubricating oil and grease and water and glycol. Some contain unusual antifreeze compounds and degreasers and some are contaminated with PCBs and metals. A protocol (the DEW Line Clean Up Protocol for Barrels) was developed by the ASU for use at all DEW Line sites.
ASU personnel have been involved in researching various methods for treating PCB contaminated soil. Research has been conducted into PCBs destruction using Fenton's reagent both in the laboratory and in the Arctic. Two processes, thermal desorption and solvent extraction, were assessed by the ASU for Indian and Northern Affairs Canada by analyzing products in trials carried out by companies hoping to use their equipment at Resolution Island. The ASU was also heavily involved in the production of an Environmental Impact Statement as part of the approvals mechanism for disposing of the PCB contaminated soils required by the Nunavut Impact Review Board (NIRB).
Barrier Work at Resolution Island
After excavation of PCB contaminated soil, barriers were designed and constructed to prevent further mobilization of soils trapped in fractured bedrock and run-off containing soil from inaccessible areas. The barrier system at the top of the cliff in the S1/S4 valley was constructed in the first two weeks of August 2003. The funnel and gate system was designed so that water flowing down the S1/S4 valley had to pass into the funnel and out through the gate, which was comprised of a series of filters.
Schematic of the Funnel and Gate System
The funnel was shaped partially on one side by a natural rock face and gabions on the other side. There was a gradual slope towards the front of the filter box or gate. Water was contained in the funnel by two layers of geocomposite clay liner (GCL) on top of which was placed a black synthetic liner. The filter box was designed with slots such that various filter and absorbent materials could be placed in them.
Completed S1/S4 barrier (2003)
The Modified S1/S4 Barrier (2013)
The PCB contaminated soil was shipped south to be destroyed at a high temperature incineration facility. Lower levels of contaminated soil were stored safely in a specially engineered (lined) landfill.
Ongoing Monitoring and Maintenance
ASU staff continue to be involved in the ongoing monitoring and maintenance of the barrier systems. This includes field excursions for sampling and replacing barrier materials, as well as laboratory analyses. The most recent field maintenance occurred in 2019 with the construction of a new barrier at the Furniture Dump location and partial decommissioning of the S1/S4 valley barrier, and included the replacement of the filters in all barriers.
Weather Research
The ASU was contracted by Crown-Indigenous Relations and Northern Affairs Canada (CIRNAC) to undertake a project entitled "Precipitation Events Remote Monitoring Pilot Project on BAF-5 Resolution Island for 2021/2022." This work summarizes publicly available weather data that have been modelled to consider the effects of climate change using accepted representative concentration pathways (RCPs) to inform and assist the planning for remote site maintenance operations with the goal of minimizing unnecessary site visits.
Precipitation Events Remote Monitoring Pilot Project on BAF-5 Resolution Island