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ENVIRONMENTAL REMEDIATION AT THE MOISIE FORMER ROYAL CANADIAN AIR FORCE RADAR STATION, SEPT-ILES, QC
Pouliot, Y., B. Michaud, J. Gagnon, and A. Martin.
2018 RPIC Federal Contaminated Sites National Workshop, 13-15 June, Toronto, ON. 31 slides, 2018

The Air Force Base in Moisie near Sept-Iles (QC), a former Pinetree Line Radar station, was in operation from 1953 to 1988 as part of NORAD. Base activities led to contamination of the soil and groundwater by fuel oil and used motor oil. Environmental site assessments showed the presence of ~10,600 m3 of contaminated soil at 4-10 m bgs, including 4,000 m3 below the water table. The site is located on a sandy point lying between an important salmon river and the St. Lawrence Estuary. From the nine bidders who responded to the request for proposals, the successful bidder retained the approach of excavating the contaminated soil and treating it using an on-site biopile technology. A 3-yr contract was awarded in December 2015. The project faced the following challenges: project acceptance by the local population and Innu First Nation; multiple land owners; the presence of a 50 m long building above the excavation area; the need to dewater the excavation zone; and temporary displacement of 87,500 m3 of uncontaminated soil above the contaminated soil during excavation. The main portion of the contaminated soil (11,900 m3) was placed in the biopile in September 2016 and reached the remedial criteria within four months of treatment. The second portion (2,407 m3) should complete remediation in 2018. http://rpic-ibic.ca/images/2018_FCSW_/Presentations/5_-_162_-_Martin_ENG_REV.pdf



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