Closure Planning

We have worked with several mining companies in Ontario and Saskatchewan, carrying out studies of the natural environment (fish, invertebrates, water and sediments), in support of mine closure studies and reports.

Studies have examined both spatial and temporal variations, and have demonstrated recovery of aquatic environments over time. Temporal variations in fish tissue concentrations of metals can be used to show changes in bioavailability of released substances.

Sediment cores can be used to show that metals and other contaminants are being actively buried by the deposition of clean natural materials.

Benthic invertebrate communities can, likewise, demonstrate recovery of the aquatic ecosystem over time, and illustrate the bioavailability and bio-relevance of metals in the environment.

We use state of the art models to estimate the bioavailability of metals in the water-borne phase, and sediment phase, and can collect bio-relevant samples in both water (dissolved) and sediment (pore water) in order to improve on estimates of bioavailability of metals to biota.

For more information please contact:
Bruce Kilgour
bkilgour@kilgourassociates.com