| This project is focused on the site remediation of diesel-contaminated soil at Resolution Island, Nunavut, a former military base that supported the Defence Early Warning (DEW) Line surveillance project from 1954 to 1973. The site is 130 km from the nearest community; the isolation, inclement weather and average summer temperatures of 5°C present significant challenges for remediation. The collective plume area of hydrocarbon contaminated soil exceeded 2.5 hectares.; Based on the results from the trial landfarm a full-scale landfarm was constructed in August 2004. In addition a 2-part barrier system [part (1) settling area with bed drainage; part (2) funnel and gate double filtration system] was designed and constructed to prevent plume migration in a drainage pathway containing hydrocarbon contaminated soil. The novel system design was found to appropriately function during thaw periods and to sustain harsh conditions over the course of one Arctic winter. The filter system was found to adsorb TPH from the water. Over two summer seasons the TPH concentrations in soil and water were not observed to change in the drainage pathway and the HDPE, PVC and GCL liner material were observed to perform well. (Abstract shortened by UMI.)... |
