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Found 10 records similar to Meltwater from snow contaminated by oil sands emissions is toxic to larval fish, but not spring river water
Oil Sands Sediment Exposures of Embryo-larval Fathead Minnows
Dataset contains laboratory-studied fathead minnow egg and larval survival rates when exposed to sediments collected from 18 sites in the Athabasca watershed (2010-2014). A controlled laboratory study examined the impacts on fathead minnow eggs and larval development when exposed to collected sediments at concentrations of 1, 5 and/or 25 g/L. Sediments and water were renewed daily, and eggs were assessed as they hatched (in about 5 days), and as the larval fish grew to 8-9 days post hatch (dph), and 15-16 dph. The data in the file present the mean survival (and standard deviation).
Dataset contains laboratory-studied Fathead minnow (Pimephales promelas) survival when exposed to bitumen sediments from the oil sands region of northern Alberta, cut through the McMurray Formation (MF). These are the results of the toxicological exposures, when Fathead minnow embryos were exposed to water from simulated rainfall on the river sediments.
Air emissions from oil sands development can come from a number of sources including industrial smokestacks, tailings ponds, transportation, and dust from mining operations. Air quality monitoring under the Joint Canada-Alberta Implementation Plan for the Oil Sands is designed to determine the contribution of emissions from oil sands activities to local and regional air quality and atmospheric deposition both now and in the future. Deposition data include:
Passive Sampling of PACs deployed for two month periods across a network of 17 sites
Active sampling of PACs at three sites to inform the amount of dry deposition
Particulate metals (24 hour integrated samples following the one in six day National Air Pollution Surveillance (NAPS) cycle)
Plant species richness, composition, and soil chemistry parameters were assessed in wetlands and uplands in the oil sands region of northern Alberta. The concentrations of metals and polycyclic aromatic hydrocarbons (PAHs) were measured in soil and plant samples collected from 2012-2014, and naphthenic acids (NAs) from soil collected in 2012. Vegetation surveys and a seedbank study showed that plant species richness and composition differed among study sites, with more species (many non-native) found at sampling sites located within close proximity to oil sands development and infrastructure compared to sites located further afield. PAH and metal concentrations in soil at sites near oil sands industrial development were generally higher than levels at sites located outside of the immediate surface mining area.
The health of individual amphibians, amphibian populations, and their wetland habitats are monitored in the oil sands region and at reference locations. Contaminants assessments are done at all sites. Amphibians developing near oil sands activities may be exposed to concentrations of oil sands-related contaminants, through air emissions as well as water contamination. The focus of field investigations is to evaluate the health of wild amphibian populations at varying distances from oil sands operations.
Environment and Climate Change Canada has been monitoring ambient air in the oil sands region for polycyclic aromatic compounds (PACs) using passive air samplers since November 2010. Ambient air samples collected using the established protocols of the Global Atmospheric Passive Sampling (GAPS) Network are termed passive PAC samples. Passive samplers are deployed for two-month periods across a network of 17 sites that are maintained by the Wood Buffalo Environmental Association. Average PAC levels across the passive sampling sites in the oil sands region are comparable to urban/sub-urban levels across Canada and are elevated compared with background rural sites in Canada.
Avian Health and Contaminants
Data on tree swallow clutch size and nestling weight, wing length, organ size, and measures of thyroid function were collected from study sites near active mine pits, tailings ponds and processing plants on oil sands leases in Alberta, and at relatively undisturbed reference sites south of Fort McMurray, Alberta. Analysis of the birds’ reproductive performance has revealed that neither hatching success nor fledging success differed between industrial and reference sites. PAHs, alkylated PAHs, and dibenzothiophenes were measured in tree swallow nestling tissues and fecal samples. Tree swallow nestlings on the industrial sites had higher or comparable PAH concentrations in both their muscle and fecal samples, compared to tree swallow nestlings on the reference sites.
Air emissions from oil sands development can come from a number of sources including industrial smokestacks, tailings ponds, transportation, and dust from mining operations. Air quality monitoring under the Joint Canada-Alberta Implementation Plan for the Oil Sands is designed to determine the contribution of emissions from oil sands activities to local and regional air quality and atmospheric deposition both now and in the future. Source emission data include:
Compiled and assessed information from existing emissions inventories to enhance the quality of high resolution forecasts and simulations of air quality in the oil sands region;
Estimates of potential emissions to the air from tailings ponds analysed for reduced sulphur compounds (RSC), volatile organic compounds (VOC) and odour perceptibility.
Atmospheric Contaminant Deposition using Snowpack
The data set includes snow samples (metals, water chemistry and polycyclic aromatic hydrocarbons [PAHs]). Data from 2012-2014 snowpack samples collected from ~90-130 sites located varying distances from the major oil sands development area show deposition patterns and levels consistent with earlier studies carried out in 2008 (Kelly et al. PNAS, 2009 and 2010). As with earlier findings, concentrations of numerous metals, water chemistry parameters (Ni, Pb, Zn, V, La, Al, Fe, total Hg, methyl Hg, total suspended solids [TSS], particulate organic carbon [POC], particulate organic nitrogen [PON], total phosphorus [TP]) and PAHs decrease with distance from the major mining extraction and upgrading facilities.
Environment Canada has been monitoring ambient air in the oil sands region for polycyclic aromatic compounds (PACs) since December 2010. Ambient air samples collected using the established protocols and schedule of the National Air Pollution Surveillance (NAPS) program are termed active PAC samples. Active sampling is done at three sites (Mannix [AMS5], Lower Camp [AMS11] and Fort McKay South [AMS13], Alberta). Ambient air concentrations in the oil sands region can be used to evaluate regional differences in PAC concentrations and can be compared with levels of PACs measured in other parts of Canada and to ambient air quality objectives.