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Oil Sands Environmental Management Bibliography

The Cumulative Environmental Management Association (CEMA)partnered with the Oil Sands Research and Information Network (OSRIN) to create the new Oil Sands Environmental Management Bibliography, which includes documents relevant to the environmental management of oil sands development in Alberta. The majority of the documents focus on the mineable oil sands in the Athabasca deposit, though some documents relate to in-situ developments. This bibliography was last updated in November 2014.

PAH sediment studies in Lake Athabasca and the Athabasca River ecosystem related to the Fort McMurray oil sands operations: Sources and trends

Year of Publication: 2003

Abstract:
The oil sands operations in northern Alberta are among the most modem in the world. However, because the operations are extensive and lie on either side of the Athabasca River, there are concerns that they will adversely affect downstream environments such as the Athabasca River, its tributaries, the Peace-Athabasca deltas and Lake Athabasca. Research and monitoring programs are now investigating hydrocarbon sources, fate, and time trends in these aquatic ecosystems. Natural hydrocarbon sources (oil sands) are numerous along the Athabasca River and its tributaries. Petrogenic hydrocarbons also are abundant in downstream lakes. Lower molecular weight compounds such as naphthalene and fluorene tend to increase in concentration from upstream sources to downstream depositional areas. There is little or no evidence of temporal trends of increasing PAH concentrations in sediment cores collected in Lake Athabasca and the Athabasca delta lakes, suggesting no or minimal impact from the oil sands operations. Some PAHs exceed interim sediment quality guidelines and some bioassay studies have shown evidence of toxicity, particularly in the Athabasca delta. However, there is no evidence that this is associated with the oil sands industry. The RAMP monitoring program will continue to assess the potential impacts of the oil sands industry on river, tributary and delta ecosystems.

Paleolimnological assessment of limnological change in 10 lakes from northwest Saskatchewan downwind of the Athabasca oils sands based on analysis of siliceous algae and trace metals in sediment cores

Year of Publication: 2013

Abstract:
The extraction of bitumen from the Athabasca oil sands is rapidly expanding, and emission of sulphur and nitrogen oxides has substantially increased. To determine whether lakes downwind of this development in northwest Saskatchewan have been detrimentally impacted since development of the oil sands, a paleolimnological assessment of ten lakes was carried out. Analysis of diatom valves and inferences of diatom-inferred pH indicated that emissions have not resulted in widespread chronic acidification of acid-sensitive lakes ~80–250 km east and northeast of the oil sands development around Fort McMurray and Fort Mackay. However, one of the closest sites to the development indicated a slight decline in diatom-inferred pH, but the two next closest sites, both of which had higher alkalinity, did not show any evidence of acidification. There were also no consistent trends in the concentration or flux of total or individual priority pollutants including lead, mercury, copper, zinc and vanadium. The sedimentation rates in most lakes increased since the mid-1900s, along with increased flux of both diatoms and scaled chrysophytes. Subtle changes in the species assemblages of diatoms and increased flux of diatoms and chrysophyte scales are consistent with recent climate change in this region.

Partial freezing by spraying as a treatment alternative of selected industrial wastes

Authors Gao, W.
Year of Publication: 1998

Abstract:
The principle objective of this study was to evaluate the spray freezing process as a treatment alternative for industrial wastewater. It included the investigation of the ice nucleation characteristics of pulp mill effluent, piggery wastewater and oil sands tailings pond water droplets, the freezing behavior of freely suspended wastewater droplets and impurity rejection and concentration phenomena occurred in the freezing and melting process. The laboratory experiments showed that wastewater droplets made from different wastewaters froze at different temperatures when they were tested under the same experimental conditions. When a water drop was freely suspended in the cold air, the freezing started at the bottom of the drop and then spread over the entire surface enveloping the drop in an ice shell. The freezing temperature of a droplet was influenced by the nature of the wastewater, the ambient air temperature, the droplet size, the impurity concentration and the pH of the wastewater. When wastewater was sprayed into a cold atmosphere, the contaminants in the wastewater were rejected by the growing ice crystals and were concentrated in the liquid phase as part of the sprayed water froze. The unfrozen water generated in the spray freezing process could carry away more than 50% of the impurities in the source water from the ice mound. The spray ice impurity concentration could be predicted by a mathematical model based on the mass balance of the impurity in the continuous spray freezing process. Impurities remained in the spray ice would redistribute and were concentrated in the early meltwater. Experimental results indicated that the fractionation of impurities from melting ice column was affected by the nature of the wastewater, the impurity concentration in the spray ice, the age of the ice (or storage time), the distribution of the impurities within the ice column and the ice column density. The initial 30% of the meltwater removed between 50% and 80% of the total impurities (indicated by TOC, COD, color, conductivity, Cl - and SO2-4 concentrations) in the ice columns. The meltwater impurity concentration can be predicted using empirical equations.

Partitioning and bioaccumulation of metals from oil sands process affected water in indigenous Parachlorella kessleri

Year of Publication: 2013

Abstract:
This paper studies the partitioning and bioaccumulation of ten target metals ((53)Cr, Mn, Co, (60)Ni, (65)Cu, (66)Zn, As, (88)Sr, (95)Mo and Ba) from oil sands tailings pond water (TPW) by indigenous Parachlorella kessleri. To determine the role of extracellular and intracellular bioaccumulation in metal removal by P. kessleri, TPW samples taken from two oil sands operators (Syncrude Canada Ltd. and Albian Sands Energy Inc.) were enriched with nutrient supplements. Results indicate that intracellular bioaccumulation played the main role in metal removal from TPW; whereas extracellular bioaccumulation was only observed to some extent for Mn, Co, (60)Ni, (65)Cu, (88)Sr, (95)Mo and Ba. The FTIR scan and titration of functional groups on the cell surface indicated low metal binding capacity by indigenous P. kessleri. However, it is believed that the dissolved cations and organic ligand content in TPW (such as naphthenic acids) may interfere with metal binding on the cell surface and lower extracellular bioaccumulation. In addition, the total bioaccumulation and bioconcentration factor (BCF) varied during the cultivation period in different growth regimes.

Pathways for First Nation and Metis youth in the oil sands

Year of Publication: 2009

Abstract:
This study looks at the political, social, and economic influences on First Nation and Métis youth’s attitudes toward further learning and higher levels of education in the municipality of Wood Buffalo, Alberta, the site of rapid industrial development related to the oil sands in the past few decades. Linked to this, we explore some of the institutional and policy structures that support or hinder the ability of First Nation and Métis youth to finds pathways leading to sustained employment with decent pay, good working conditions, and career potential. The first five sections of this report set the context by presenting an historical overview of government-Aboriginal relations, a review of statistics related to education and training of the Aboriginal identity population in Canada and Alberta, recent literature focused on Aboriginal youth, and a description of relevant education and training policies and issues. The last two sections present our analysis of 65 interviews and focus groups involving 91 individuals, conducted between March and October 2008. Interview participants consisted of a number of Aboriginal community members, including youth aged 15 to 30 years; high school and college educators, including First Nation and Métis educators; representatives of government; leaders and staff members of local First Nation and Métis organizations; as well as individuals involved in various capacities with local agencies and corporations. Our historical overview suggests that jobs alone are unlikely to eliminate the inequities experienced by Aboriginal communities – inequities that stem, in large part, from historical relations between governments and Aboriginal people. Further, while dependency and economic underdevelopment are unacceptable to Aboriginal people, increased economic development is also seen as problematic by some community members concerned over the growing environmental impacts, continued loss of cultural ways, and worsening social problems (e.g. lack of housing, homelessness, substance abuse) that have accompanied large-scale oil sands development in Wood Buffalo. It is important to acknowledge these tensions for First Nation and Métis youth when thinking about their pursuit of education and work pathways. Statistics suggest that, while the Aboriginal identity population in Wood Buffalo is doing “better” in terms of educational attainment and employment than their counterparts in other parts of the province, it is noteworthy that they continue to lag behind Alberta’s non-Aboriginal population. In research, the experience of First Nation and Métis youth is often analyzed from a deficit perspective; for example, authors have highlighted various factors adversely impacting Canada’s Aboriginal youth, including low educational attainment and household income, high rates of teen pregnancy, high rates of incarceration, and high rates of residential and school mobility. However, this portrayal of youth is only useful, in our view, if understood within the context of historical colonization and contemporary uneven power relations and if accompanied by greater discussion of institutional opportunities and constraints. In many instances, we use the term “First Nation” rather than “First Nations” in this report. This is to infer that the youth, people, students, individuals, schools, communities, reserves, etc. being referenced are associated with specific sovereign, distinct entities in the Canadian context. The term “First Nations” is a more general descriptor. A look at federal and provincial policies and programs related to First Nations and Métis education and training suggests that, although there is a plethora of policies and programs, issues around access to and control over education and training persist for Aboriginal people. Further, outcomes do not seem commensurate with the level of investment by the various partners. In Wood Buffalo, industry has become an influential player in education and training due to its stated interest in developing capacity within local Aboriginal communities and working with them to develop a pool of skilled labour. However, increased reliance on industry partners appears to foster inequities within and across communities and to result in a more fragmented approach to education and training in the region.

Patterns of initial saprophytic fungal colonization of grass roots from two severely disturbed soils

Year of Publication: 1984

Abstract:
Development of the root-surface fungal assemblages of Agropyron trachycaulum grown on amended oil-sands tailings and a subalpine coal-mine spoil from Alberta (Canada) was followed over one growing season. Fungi were isolated, using a root-washing procedure, from the region of main seminal and nodal roots 4 cm from the root–hypocotyl axis. Fungal colonization of the root surfaces was rapid, with equilibrium numbers of species reached 2 weeks after plant emergence. Although the application of either fertilizer, peat, or sewage sludge to these spoils had no effect on the general form of the colonization curve, peat amendation did result in significantly higher numbers of species on the root surfaces. Species turnover within all assemblages was high throughout the growing season. The amount of species replacement ranged from a low of 67% to a high of 91% between consecutive 4-week sampling periods. Thus, although the number of species was relatively constant, species composition changed considerably. The structure of the root-surface fungal assemblages was characterized by a large proportion of rare species. The species abundance distributions were essentially negative exponential. Neither time nor amendation had any significant effect on these distributions. The large incidence of rare species within the assemblages suggests that these root surfaces represent nonequilibrium systems with respect to species occurrences.

Peerless - Graham Lakes Resource Management Plan

Authors Short, P.
Year of Publication: 1977

Abstract:
The purpose of the Peerless - Graham Lakes Study was to develop a detailed, integrated resource management plan for the area. In addition to this, it was to act as a pilot project for this type of planning in the future.

Peptide arrays for detecting naphthenic acids in oil sands process affected water

Year of Publication: 2014

Abstract:
Naphthenic acids (NAs) are water-soluble components of petroleum. The characterization and quantification of NAs by analytical methods have proved quite challenging, whilst the toxic effects of these water-soluble compounds on a variety of organisms adversely affecting reproduction and steroid production is becoming apparent. In this study, we report a fluorescence-based competitive binding method for rapid sensing of the presence of NAs using cellulosic peptide array strips as sensors. The peptide array was designed from sequences derived from the estrogen receptor (ER). Several of these peptides were able to detect the presence of NAs at low micromolar (∼5 mg L−1) levels in different oil sands process affected water samples. The specific binding of one of the peptides, peptide 17 (EGXVEIFDXLLATS) with NAs was evaluated using isothermal titration calorimetry. The results show that peptide 17 interacts strongly with NAs with an apparent binding constant (Ka) of 96 × 106 M−1, and may bind NAs in a similar fashion as ER interacts with estrogen. Finally, the data support that the peptides displaying high affinity for NAs can be used for developing disposable peptide-based sensor arrays for NA detection in oil sands process affected water samples.

Performance evaluation of a tailings pond seepage collection system

Year of Publication: 2010

Abstract:
Disposal of oil sands tailings in ponds is a common method used by oil sands operators to manage the large volume of tailings generated from oil sands mining. This study considered a large tailings pond with an 11 km long ring dyke that was constructed of permeable tailings sand and equipped with drains and seepage collection ditches designed to collect process-affected water (PAW) from the dyke. The effectiveness of this seepage collection system was examined at the downgradient end of the tailings pond and dyke system using a focussed field investigation supported by groundwater flow modelling. A network of piezometers and drive points were installed in a 1 km2 area to facilitate hydraulic measurements and water sampling to characterize the surface water and groundwater flow system. Chemical tracers suggest migration of PAW in a shallow, permeable sand deposit beyond an inner seepage collection ditch, but elevated hydraulic heads beyond the outer ditch have prevented further migration. A groundwater flow model was used to simulate the observed hydraulic dyke conditions and estimate the amount of PAW discharging into the shallow aquifer in the study area. Under the present hydraulic conditions, the seepage collection system is currently working to effectively contain PAW.

Performance of grasses shrubs and trees on disturbed soil at the AOSERP Mildred Lake camp experimental area

Year of Publication: 1980

Abstract:
The plants referred to in this report were initially established on the AOSERP Mildred Lake Camp area in 1977. The objectives of the program were to establish grass, shrub and tree species for evaluation of their response, particularly their reproduction response, to the climatic and edaphic conditions north of Fort McMurray. Over the 1977 growing season, 50 species and/or sources of grasses were spring seeded, 47 species and/or sources were started in containers and transplanted to the field and 24 species and/or sources were fall seeded. In addition, 12 woody plant species and/or sources were also planted in the field after growth in the greenhouse in containers. This report discusses the results of an evaluation of the plants conducted in late August and September, 1979.

Performance of vegetation on mined sands

Authors Bliss, L. C.
Year of Publication: 1979

Abstract:
This reports covering the results of the 1977 research, adds significantly to the earlier findings. It is always difficult to predict long term plant responses on only a few years of data; in this case, only two years. Climatically the two summers (May - August) were very similar, with the mean monthly temperatures averaging 0.2°C lower in 1977. Precipitation was ~20% higher in 1977, cloud cover was also greater, and as a result, diffuse radiation was higher. Short wave and net radiation were similar to the previous year. Net radiation increased from 70 W m-2 in early March to a maximum 207 W m-2 in mid-June. Photosynthetically active radiation (PHAR) was about 50% of incoming radiation, similar to other temperate region studies. Summer climate of the Richardson lookout Station is similar to the long term summer climate at Fort McMurray. Temperatures for May through August were slightly warmer (0.4 to 1.3°C) at Richardson and precipitation is ~20 mm less than at Fort McMurray. There are also fewer summer days with precipitation at the research site (44 vs. 55 days). As found the previous year, little precipitation runs off these porous sands. During spring thaw. water runs down slope within the soil above the frozen soil layer. About 50% of total precipitation moves out of the rooting zone to greater soil depths and is therefore unavailable for plant growth. The Jack Pine forest and its limited understory use only 170-200 mm of water per year, yet soil water potentials seem to not drop below 1.0 MPa. Microclimate within a forest canopy is difficult to measure and this is further complicated by working on a slope. As in 1976, gradients of temperature, water vapour and wind were small within the forest canopy. The exchange surfaces for heat and water vapour are diffuse due to openness of the canopy and its slope position. In spite of this, the canopy acts as a \"surface layer\" for radiation. On nights with little cloud cover and light winds (0.5 to 0.8 m s-l) cold air drainage was greatest, resulting in temperature differences of 3.5 to 7.0oC between the mid-slope and bottom-slope sites. Soil heat flux amounted to 7% of net radiation measured above the canopy. Soils were naturally warmest near the surface, decreasing in heat with depth. At 200 cm soils were generally 8 to 10 oC cooler than at -2 cm and the time lag for heat transfer to the deepest level measured was 3-4 days. As observed in 1976, interception of precipitation by the tree canopy and trunk is high in storms with little precipitation and rains of low intensity predominate. On average, 53% of all precipitation was absorbed by the trees. Interception was greatest (44%) near the tree base (25 cm) and significantly less (17%) at a distance of 1 m. As a result of increased turbulent exchange within the forest canopy a more homogeneous environment of temperature, water vapour, and air movement results. This, however, makes it more difficult to establish the actual sources and sinks within a Jack Pine forest. The field and laboratory data on young and mature Jack Pine show how well this tree species is adapted to high water stress environments. As with other conifers, this species has relatively low maximum net assimilation rates (6 to 8 mg dm-2 h-1). After two drying cycles, maximum rates were 4.5 mg dm-2 h-1. This indicates some supression of photosynthetic capacity following severe drought yet an ability for considerable recovery. Net assimilation reached zero at 2.2 MPa leaf water potential, again indicating a considerable adaptation to stressful environments. Trees avoid winter and spring drought stress by maintaining high leaf resistances; the stomates remain closed when the soils are frozen. In winter cavitation does not occur and as a result, water columns are maintained in the xylem and therefore a better water balance. In summer the stomates are sensitive to atmospheric VPD and close prior to xylem tension or ~ leaf triggered closure. Considerable osmotic adjustment also occurs which permits further water uptake as ~ soil increases. The lethal limit for  leaf is at least -3.5 to -4.0 MPa. Under extreme drought conditions the more photosynthetically active needles survive at the expense of the young ones. All of these data contribute to a more complete understanding of why Jack Pine is so well adapted to these cold winter and warm droughty summer conditions that dominate these porous sands. The mycorrhizal studies showed that 14 species of fungi formed mycorrhizae with Jack Pine under synthetic conditions. From this work and the field studies, it appears that no small group of fungi dominate the below ground symbiotic system. In the field 57 species of fungi were found associated with Jack Pine within a limited area. The synthesis test showed that a variety of fungi produce the non-descript associations found in the field. Mycorrhizal fungi were studied in relation to Arctostaphylos uva-ursi and all of the infections were of the ectendomycorrhizal type. Fifteen species of mycorrhizal fungi were grown at different osmotic potentials using NaCl and sucrose. All species grew the most at high osmotic potentials (-0.16 and -0.61 MPa). This differs from other studies for the fungi grew most at lower potentials (-1.5 to 5.8 MaPa). In summary this second year of limited field work but intensive laboratory and greenhouse studies contribute to a much fuller understanding of the factors related to the very successful growth of Jack Pine and its associated lichen understory on these deep sands.

Persistence and fate of acidic hydrocarbons in aquatic environments: Naphthenic acids and resin acids

Authors McMartin, D. W.
Year of Publication: 2004

Abstract:
The novel application of combination, or two stage, photochemical and microbial degradation systems for removal of resin acids from natural river water and single stage photolysis for degradation of naphthenic acids in natural river water was investigated. The organic compounds included in this project comprise naphthenic acid model compounds and mixtures as well as four resin acids. Naphthenic acids are crude oil-derived and accumulate to significant concentrations (>100 mg/L) in tailings pond water at oil sands extraction facilities. Resin acids are pulp and paper mill-derived compounds that tend to persist at low levels in receiving waters. For each compound group, analytical methods utilizing liquid chromatography negative ion electrospray ionization mass spectrometry (LC/ESI/MS) were developed. The main hurdle to developing analytical methods for the naphthenic acids and resin acids are related to their polarity, complexity, and lack of available standards for the various individual components. As well, co-extractives, such as humic and fulvic acids, tend to interfere with the detection of naphthenic acids in aquatic samples (Headley et al., 2002a). Resin acid mixtures are not as complex as the naphthenic acids, although each group of hydrocarbon acids may include several isomeric compounds. The application of photochemical degradation prior to biodegradation was proven to be effective here for rapid degradation of the resin acids. In general, the resin acid precursors were more susceptible to the photolysis than were the naphthenic acids. Through thermal maturation and increased complexity, the naphthenic acids seemingly become more resistant to degradation, as evidenced by their commercial use as anti-microbial agents and the observed resistance to photolysis noted in this research. The results of this research may be significant for the design of staged treatment for reduced microbial shock loading and increased bioavailability (defined here as the ability of microbial organisms to degrade the target contaminants) in both bioremediation systems and receiving waters. Specifically, four selected pulp and paper mill-associated resin acids were exposed to several ultraviolet/visible (UV/vis) spectrum radiation sources in water collected from the River Saale in Germany. Background resin acid concentrations were observed in water collected in 2001 and 2002 from various locations along the well-forested River Saale and a manuscript detailing these results published. Analyses of water samples collected in the pulp and paper milling region of the river (in the state of Thuringia) indicated that resin acids persist through biodegradation treatment systems and for several hundred kilometres downstream. All four resin acids were degraded by facile photochemical and microbial degradation with pseudo-first-order kinetics. Half-life values were in the ranges of 18 to 200 minutes for photolysis applications, 8 to 40 hours for biodegradation applications and 3 to 25 hours for two-stage photochemical-microbial degradation processes, in which photolysis was limited to three hours. From these results, it was shown conclusively that photolysis pre-treatment is a viable and efficient method for reducing both resin acid concentrations and the associated acute toxicity. The naphthenic acids investigated in this study were not effectively degraded via UV/vis radiation, including UV-A/UV-B radiation between 300-400 nm, near-monochromatic UV254-radiation, full spectrum artificial solar radiation and natural sunlight. The photochemical degradation potential of three model naphthenic acid compounds and three naphthenic acid mixtures (one extract from the Athabasca Oil Sands and two commercial mixtures) were examined in Athabasca River water. Photolysis at UV254 was the most successful degradation source in all instances, although most naphthenic acids were not significantly degraded by any of the radiation sources. Therefore, it was determined that photolysis is not likely to contribute significantly to environmental degradation and attenuation in the aquatic ecosystem. The results observed from the various naphthenic acids photodegradation processes, coupled with their low affinity for adsorption to soils, reveal that naphthenic acids are likely to persist in the water column. However, UV/vis radiation is capable of significantly changing the composition of mixtures in the aquatic ecosystem, but not reducing overall naphthenic acid concentrations. This may not be a beneficial as there is the potential for increased toxicity toward the lower molecular weight naphthenic acids.

Petroleum coke adsorption as a water management option for oil sands process-affected water

Year of Publication: 2012

Abstract:
Water is integral to both operational and environmental aspects of the oil sands industry. A water treatment option based on the use of petroleum coke (PC), a by-product of bitumen upgrading, was examined as an opportunity to reduce site oil sands process-affected water (OSPW) inventories and net raw water demand. Changes in OSPW quality when treated with PC included increments in pH levels and concentrations of vanadium, molybdenum, and sulphate. Constituents that decreased in concentration after PC adsorption included total acid-extractable organics (TAO), bicarbonate, calcium, barium, magnesium, and strontium. Changes in naphthenic acids (NAs) speciation were observed after PC adsorption. A battery of bioassays was used to measure the OSPW toxicity. The results indicated that untreated OSPW was toxic towards Vibrio fischeri and rainbow trout. However, OSPW treated with PC at appropriate dosages was not acutely toxic towards these test organisms. Removal of TAO was found to be an adsorption process, fitting the Langmuir and Langmuir–Freundlich isotherm models. For TAO concentrations of 60 mg/L, adsorption capacities ranged between 0.1 and 0.46 mg/g. This study demonstrates that freshly produced PC from fluid cokers provides an effective treatment of OSPW in terms of key constituents' removal and toxicity reduction.

Petroleum coke and soft tailings sediment in constructed wetlands may contribute to the uptake of trace metals by algae and aquatic invertebrates

Year of Publication: 2012

Abstract:
The fate of trace metals in pore water collected from wetland sediments and organisms exposed to petroleum coke were evaluated within in situ aquatic microcosms. Oil sands operators of Fort McMurray, Alberta, Canada produced 60 million tonnes of petroleum coke by 2008, containing elevated concentrations of sulphur and several trace metals commonly seen in oil sands materials. This material may be included in the construction of reclaimed wetlands. Microcosms were filled with a surface layer of petroleum coke over mine-waste sediments and embedded in a constructed wetland for three years to determine how these materials would affect the metal concentrations in the sediment pore water, colonizing wetland plants and benthic invertebrates. Petroleum coke treatments produced significantly elevated levels of Ni. We also found unexpectedly higher concentrations of metals in “consolidated tailings” waste materials, potentially due to the use of oil sands-produced gypsum, and higher background concentration of elements in the sediment used in the controls. A trend of higher concentrations of V, Ni, La, and Y was present in the tissues of the colonizing macrophytic alga Chara spp. Aeshnid dragonflies may also be accumulating V. These results indicate that the trace metals present in some oil sands waste materials could be taken up by aquatic macro-algae and some wetland invertebrates if these materials are included in reclaimed wetlands.

Petroleum hydrocarbon content leaching and degradation from surficial bitumens in the Athabasca oil sands region

Authors Fleming, M.
Year of Publication: 2012

Abstract:
Mine reclamation has become a topic of considerable research in the Athabasca Oil Sands Region of Northeastern Alberta, Canada. In this area some of the largest open pit mines in the world extract bitumen, a type of heavy oil, from the oil bearing McMurray Formation. At the close of mine operations, lease holders are required to return the land to equivalent capability. To achieve this, several existing waste piles will need to be capped and a functioning ecosystem re-established. Proposed borrow pits for capping material were recently found to contain reworked bitumen materials of various shapes and sizes. This reworked bitumen has been named tarballs by local industry. The use of that name is maintained throughout this study. The tarball accumulations are very abundant in some areas but also occur infrequently in apparently clean areas. In this study, the petroleum hydrocarbon signature and leaching characteristics of the tarballs were determined. The hydrocarbon content and com- position of the tarballs were assessed using the Canadian Council of Ministers of the Environment (CCME) methods. The data were presented in terms of the four CCME fractions. Leaching characteristics were de- termined using a custom designed, unsaturated soil column experiment carried out at the University of Saskatchewan. The soil column was monitored for petroleum hydrocarbons, total carbon and total organic carbon in leachate water and soil respiration as a surrogate for biodegradation. The bitumen was found to consist primarily of heavy hydrocarbons, CCME Fractions 3 and 4, at levels of thousands and tens of thousands of mg/kg respectively. Gravimetric analyses indicated that a significant proportion of the tarball materials are very heavy hydrocarbons beyond the range of high temperature gas chromatography. These very heavy hydrocarbons are greater than carbon number C90. Lighter and more mobile hydrocarbons were occasionally identified at the core of larger accumulations. Where identified, the lighter fractions were typically accompanied by F3 and F4 hydrocarbons at one to two orders of magnitude greater than typical tarball material. Leachate was found to contain F2 hydrocarbons at less than 0.2 mg/L, a small fraction of the CCME clean water guideline of 1.1 mg/L. F3 hydrocarbons were identified at levels up to 0.6 mg/L. Soil respira- tion indicated a very low activity system, suggesting limited potential for biodegradation. Tarball materials are concluded to be of little concern for potential impacts to groundwater based upon the hydrocarbon fingerprint and the observed leaching characteristics of the tarball materials.

Petroleum hydrocarbons (PHCs) in lean oil sand (LOS): Degradation potential and toxicity to ecological receptors

Authors Visser, S.
Year of Publication: 2008

Abstract:
This report documents the results of studies conducted in two receiving soils: i) a fine-textured silica sand; and ii) a 50:50 by volume mixture of fine-textured silica sand combined with peat from a treed fen located on the Suncor site.

Petroleum industry incident support plan

Authors
Year of Publication: 2011

Abstract:
The Petroleum Industry Incident Support Plan (PIISP, the plan) is the provincial-level plan whichdirects Government of Alberta (GoA) operations in supporting a local authority, a licensee or an operator during an emergency. It is intended solely for provincial departments/agencies. This plan may be used for any area of the petroleum industry where the Energy Resources Conservation Board (ERCB) has jurisdiction.

Phenolic profiles in natural and reconstructed soils from the oil sands region of Alberta

Year of Publication: 2012

Abstract:
This research was conducted in the Athabasca oil sands reclamation area of northeastern Alberta, where land reclamation entails reconstruction of soil-like profiles using salvaged materials such as peat and mining by-products. Successful reclamation is in part dependent on the quality of the organic capping of these reconstructed soils. This study investigated organic matter composition between reconstructed and natural soils. Soil samples (0–10 cm) were taken from 45 plots to represent a range of reclaimed and undisturbed sites. The botanical origin of soil organic matter was characterised through cupric oxide oxidation, which yields lignin monomers hypothesized to reflect vegetation inputs and extent of decomposition based on time since reclamation. Additional soil organic matter parameters were obtained using acid hydrolysis, physical separation and ramped cross polarisation C-13 nuclear magnetic resonance techniques. Yields of vanillyl phenols, coumaryl phenols, p-hydroxy phenols, summed lignin phenols and total phenolic constituents were significantly higher in natural soils than in reconstructed soils. We suggest that there may be an accelerated decomposition of peat phenols in reconstructed soils, which would leave only those phenols representative of the vascular plant history accumulated in the initial peat profile.

Phosphorus content and accumulation of carbon and nitrogen in boreal forest soils

Year of Publication: 2003

Abstract:
Phosphorus plays a central role in energy cycling, is largely unavailable in soil and, unlike carbon and nitrogen, has low atmospheric inputs making the phosphorus capital of ecosystems largely dependent on the parent geologic material. Nitrogen accumulation requires an adequate supply of available phosphorus and both are associated in fairly definite proportions in soil organic matter. This study explores the extent that phosphorus in parent material is related to the accumulation of carbon, nitrogen and phosphorus in soil organic matter in natural soils in the Athabasca Oil Sands Region of northeastern Alberta. Forms, amounts and distribution of phosphorus in natural and reclaimed soils are compared statistically. Methods for determining available phosphorus are explored. Nutrient accumulations in soil organic matter of natural soils are weakly related to amounts of phosphorus to 1 m and nutrient ratios indicate that the systems are not currently stressed for phosphorus. Tailings sand used in reclamation have a diminished capacity for providing available phosphorus.

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