text: A detailed site investigation was completed by Golder Associates in January 2016 as mandated by the Pollution Abatement Order issued by the British Columbia Ministry of Environment. This work was part of investigation and remediation work ongoing at the Mount Polley site. The detailed site investigation was completed to produce a Human Health Risk Assessment (HHRA) report and an Ecological Risk Assessment for the affected site.
  The Post-Event Environmental Impact Assessment Report update was completed in June 2015 by Golder Associates.
  Remediation work was conducted in tandem with investigative work done by Golder.
  The Human Health Risk Assessment (HHRA) was completed by Golder Associates as part of that company's work toward implementing the Mount Polley remediation strategy. The produced report detailed current recreational and commercial uses of Polley Lake, Quesnel Lake, and Quesnel River and their environs including fisheries, swimming, boating, kayaking, canoeing, waterskiing, snowmobiling, and ice fishing. The report also noted the use of Quesnel Lake as a source of drinking water for nearby residences. As such the report investigated effect of the dam breach on human health, in particular subsistence land users, Quesnel Lake residents, and recreational land users.
  The HHRA report found that soil, surface water, and the air did not contain contaminants of particular concern that were present or that exceeded contaminated site regulations. The sediment layer exceeded the regulatory standard for lead, while vegetation had copper and vanadium present, and aluminum, copper, and vanadium were present in the fish.
  The HHRA report concluded that the risks were low to subsistence land users, recreational land users, loggers, and workers on site. Further, the human health risks associated with the tailings storage facility embankment breach were considered to be "very low". Groundwater did contain metals that exceeded drinking water standards including iron, manganese, arsenic, molybdenum, and sulfate. However, no wells that supply groundwater exist in the Hazeltine Corridor.