01654nas a2200157   4500008004100000022002700041245012400068210006900192260012300261300001000384490000800394520092200402100001801324700001701342856013701359       2009                        eng d  a1573-2959 (Electronic)00aThe use of leeches to monitor aquatic PCB contamination at Mid-Canada Radar Line site 050: four years post-remediation.0 ause of leeches to monitor aquatic PCB contamination at MidCanada  aDepartment of Environment and Resource Studies, University of Waterloo, Waterloo, ON, Canada. ljtsuji@fes.uwaterloo.ca  a1–70 v1533 aThe Mid-Canada Radar Line (MCRL) was built by the Canadian government during the 1950s and closed in the 1960s. MCRL Site 050 located in close proximity to Fort Albany First Nation was a source of polychlorinated biphenyls (PCBs); thus, this site was remediated in 2001. There has been concern in Fort Albany that the Albany River by MCRL Site 050 is still contaminated. We examined whether the aquatic environment surrounding MCRL Site 050 has returned to background levels four years post-remediation using leeches (Haemopis spp.) as bioindicators. Leech data for 2005 indicates that PCB levels remain higher near Site 050 than at the control site upstream; however, there has been a decrease in difference between Site 050 and the control site for leech body burden between years. Thus, the removal of the terrestrial source of PCB contamination at Site 050 appears to have removed the main source of aquatic PCBs.1 aTsuji, L, J S1 aMartin, I, D  uhttps://nematoda.myspecies.info/content/use-leeches-monitor-aquatic-pcb-contamination-mid-canada-radar-line-site-050-four-years-post