Fieltsch W.,Stantec Consulting Ltd.
NACE - International Corrosion Conference Series | Year: 2016
As utility corridors become increasingly congested, AC interference on pipelines due to collocation with high voltage AC (HVAC) transmission powerlines continues to be a growing concern. Many pipeline operators have large quantities of existing pipeline infrastructure that has not been fully assessed to determine whether it is at risk due to AC interference. The primary risks on these pipelines under powerline steady-state conditions are safety and AC corrosion. This paper is a case study of a project involving AC interference risk ranking of over 6,400 miles (10,300 km) of existing transmission piping operated by one of the largest combination gas and electric utilities in the United States. The scope of this project is to identify the transmission pipelines that are at greatest risk due to steady-state AC interference, to prioritize them based on the severity of risk, and to determine what further action is required. Once the ranking is completed, it is envisioned that AC interference studies, and the design and implementation of mitigation and monitoring systems will be performed on the at risk pipeline systems in order of priority as part of a multi-year program. © 2016 by NACE International.
Smith P.G.,Stantec Consulting Ltd. |
Boutin C.,Environment Canada |
Knopper L.,Intrinsik Environmental Sciences Inc.
Archives of Environmental Contamination and Toxicology | Year: 2013
Vanadium concentrations in soil can be increased through anthropogenic inputs and can be harmful to plants. A Petri dish experiment was conducted to assess the effect of vanadium toxicity on the germination and survival of the garden lettuce, Lactuca sativa. A second study was conducted in a greenhouse to investigate the influence of species selection and nutrient concentration on the toxicity of vanadium pentoxide to plants. L. sativa and four non-crop native plant species, two grasses (Elymus virginicus and Panicum virgatum) and two broad-leaved species (Lycopus americanus and Prunella vulgaris) were selected. Artificial soil was used in both experiments, and a geometric progression of five vanadium concentrations plus controls was selected for the soil treatments. Results of the Petri dish experiment showed that seedling survival is a less sensitive end point than above-ground dry weight (DW) as measured in the greenhouse experiment. Nutrient level (100, 10, and 1 kg/ha) was found to strongly influence vanadium toxicity in the greenhouse study. At 100 kg/ha, plant tolerance to vanadium was greatest, as indicated by higher no-observed, lowest-observed, and percentage effect concentration values. Results showed that forbs (L. americanus and P. vulgaris) tended to be more sensitive than both the crop (L. sativa) and grasses (E. virginicus and P. virgatum) at high concentrations of vanadium. Soil concentrations resulting in a 25 % decrease in shoot DW were generally less than the Canadian soil quality guideline for vanadium, suggesting that 130 mg/kg may not be protective of the Canadian native plant species used in this study. © 2012 Her Majesty the Queen in Right of Canada.
Adams G.,Stantec Consulting Ltd.
NACE - International Corrosion Conference Series | Year: 2016
Engineering Assessments represent one of the most holistic and comprehensive evaluations of a pipeline's integrity and maintenance history. As per regulations and industry standards, engineering assessments are required to support operational changes to pipelines, including reactivation of a discontinued pipeline, significant increases to operating pressure, or changes in service fluid. In addition, engineering assessments are often included in operational audits - both internal and external - to evaluate the effectiveness of a pipeline's integrity management program and can provide a basis for planning future inspection and risk mitigation activities. When properly executed, an engineering assessment will validate existing threat and hazard mitigation and will also identify unmanaged threats and areas where little information exists, facilitating improvement to integrity management. Engineering assessments are complex, multidisciplinary reports that require careful planning to ensure that all potential threats to a pipeline's integrity have been considered and assessed in accordance with industry standards and requirements. This paper describes an in-depth methodology for carrying out engineering assessments on pipelines. It will outline industry best-practices for evaluating threats and provide criteria for planning future integrity management activities based on the assessment's findings. Several case studies are also presented to highlight principles covered. © 2016 by NACE International.
Bohach L.L.,Stantec Consulting Ltd. |
Frampton E.K.,Stantec Consulting Ltd.
Canadian Journal of Earth Sciences | Year: 2015
Historical Resources Impact Assessment and Mitigation studies have documented a new middle Cenomanian invertebrate fauna from the Shaftesbury Formation in the Birch Mountains, northwest of Fort McMurray, in northeastern Alberta, Canada. Although older portions (Albian) of the Shaftesbury Formation in Alberta and British Columbia have yielded invertebrate fossils, this is the first fauna of middle Cenomanian age known for the unit. The fauna includes the ammonites Acanthoceras wyomingense and Borissjakoceras orbiculatum, the inoceramid bivalves Inoceramus dunveganensis and Inoceramus prefragilis stephensoni, and the gastropod Pirsila tensa. The occurrence of the late middle Cenomanian zonal fossil A. wyomingense allows correlation between the middle “Fish Scales Formation” of the Shaftesbury Formation and the lower part of the Labiche Formation of Alberta, and with five units farther to the south in the United States, namely the Greenhorn Limestone, Lincoln Formation, and Graneros Shale of Kansas, the Frontier Formation of Wyoming, and the Belle Fourche Shale of Montana. © 2015, National Research Council of Canada. All Rights Reserved.
Anderson J.C.,Stantec Consulting Ltd. |
Dubetz C.,Canadian Department of Fisheries and Oceans |
Palace V.P.,Stantec Consulting Ltd.
Science of the Total Environment | Year: 2015
Developed to replace organophosphate and carbamate insecticides, neonicotinoids are structurally similar to nicotine. The three main neonicotinoid insecticides, imidacloprid, clothianidin, and thiamethoxam, are being re-evaluated by Health Canada's Pest Management Regulatory Agency (PMRA). An important aspect of the re-evaluation is the potential for effects in non-target organisms, including aquatic organisms.Leaching into surface waters is one of the major concerns surrounding extensive use of neonicotinoids, especially in close proximity to water bodies. The PMRA has classified IMI as 'persistent' with a 'high' leaching potential. Globally, neonicotinoids have been detected in a variety of water bodies, typically at concentrations in the low μg/L range. While IMI has been included in some monitoring exercises, there are currently very few published data for the presence of CLO and THM in Canadian water bodies.The majority of neonicotinoid toxicity studies have been conducted with IMI due to its longer presence on the market and high prevalence of use. Aquatic insects are particularly vulnerable to neonicotinoids and chronic toxicity has been observed at concentrations of IMI below 1. μg/L. Acute toxicity has been reported at concentrations below 20. μg/L for the most sensitive species, including Hyalella azteca, ostracods, and Chironomus riparius.Fish, algae, amphibians, and molluscs are relatively insensitive to IMI. However, the biological effects of THM and CLO have not been as well explored. The Canadian interim water quality guideline for IMI is 0.23. μg/L, but there is currently insufficient use, fate, and toxicological information available to establish guidelines for CLO and THM.Based on concentrations of neonicotinoids reported in surface waters in Canada and globally, there is potential for aquatic invertebrates to be negatively impacted by neonicotinoids. Therefore, it is necessary to address knowledge gaps to inform decisions around guidelines and registration status for neonicotinoid insecticides in Canada to protect our aquatic ecosystems. © 2014.
Hegmann G.,Stantec Consulting Ltd. |
Yarranton G.A.T.,121 Artists View Way
Environmental Impact Assessment Review | Year: 2011
Cumulative Effects Assessment (CEA) is a tool that can be useful in making decisions about natural resource management and allocation. The decisions to be made include those (i) necessary to construct planning and regulatory frameworks to control development activity so that societal goals will be achieved and (ii) whether or not to approve individual development projects, with or without conditions. The evolution of CEA into a more successful tool cannot occur independently of the evolution of decision making processes. Currently progress is painfully slow on both fronts. This paper explores some opportunities to accelerate improvements in decision making in natural resource management and in the utility of CEA as a tool to assist in making such decisions. The focus of the paper is on how to define the public interest by determining what is acceptable. © 2011 Elsevier Inc.
Simms E.L.,Memorial University of Newfoundland |
Ward H.,Stantec Consulting Ltd.
Remote Sensing | Year: 2013
The analysis of a series of five normalized difference vegetation index (NDVI) images produced information about a Labrador (Canada) portion of the tundra-taiga interface. The twenty-five year observation period ranges from 1983 to 2008. The series composed of Landsat, SPOT and ASTER images, provided insight into regional scale characteristics of the tundra-taiga interface that is usually monitored from coarse resolution images. The image set was analyzed by considering an ordinal classification of the NDVI to account for the cumulative effect of differences of near-infrared spectral resolutions, the temperature anomalies, and atmospheric conditions. An increasing trend of the median values in the low, intermediate and high NDVI classes is clearly marked while accounting for variations attributed to cross-sensor radiometry, phenology and atmospheric disturbances. An encroachment of the forest on the tundra for the whole study area was estimated at 0 to 60 m, depending on the period of observation, as calculated by the difference between the median retreat and advance of an estimated location of the tree line. In small sections, advances and retreats of up to 320 m are reported for the most recent four- and seven-year periods of observations. © 2013 by the authors; licensee MDPI, Basel, Switzerland.
Richardson G.M.,Stantec Consulting Ltd.
Journal of Exposure Science and Environmental Epidemiology | Year: 2015
Using data from the 2001 to 2004 US National Health and Nutrition Examination Survey (NHANES) on the number and placement of tooth restorations in adults, we quantified daily doses due to leaching of elements from gold (Au) alloy and ceramic restorative materials. The elements with the greatest leaching rates from these materials are often the elements of lowest proportional composition. As a result, exposure due to wear will predominate for those elements of relatively high proportional composition, while exposure due leaching may predominate for elements of relatively low proportional composition. The exposure due to leaching of silver (Ag) and palladium (Pd) from Au alloys exceeded published reference exposure levels (RELs) for these elements when multiple full surface crowns were present. Six or more molar crowns would result in exceeding the REL for Ag, whereas three or more crowns would be necessary to exceed the REL for Pd. For platinum (Pt), the majority of tooth surfaces, beyond just molar crowns, would be necessary to exceed the REL for Pd. Exposures due to leaching of elements from ceramic dental materials were less than published RELs for all components examined here, including having all restorations composed of ceramic.Journal of Exposure Science and Environmental Epidemiology advance online publication, 16 September 2015; doi:10.1038/jes.2015.55. © 2015 Nature America, Inc.
Enrique E.H.,Stantec Consulting Ltd.
IEEE Industry Application Society - 51st Annual Meeting, IAS 2015, Conference Record | Year: 2015
As specified in the electrical codes, a solar farm grounding system must be measured to determine if its resistance is equal to or lower than the resistance predicted by the design. The methods of choice for this measurement are the fall of potential test and the slope test. As described in IEEE 81-2012, in order for these two methods to give meaningful results, the remote current probe must be located at a distance of at least five times the largest dimension of the solar farm footprint. To comply with this requirement, some contractors have recently introduced the use sky wires of nearby sub transmission lines to inject the test current at a remote location. This paper presents the analysis of the errors introduced by the use of sky wires in the fall of potential test. © 2015 IEEE.
News Article | December 8, 2016
CALGARY, AB--(Marketwired - December 08, 2016) - A collaborative research project titled 'GENICE' that partners the University of Calgary and the University of Manitoba has been awarded $10.7 million as part of the Genome Canada 2015 Large-Scale Applied Research Project Competition (LSARP). Announced today in Montreal by Minister of Science Kirsty Duncan, the research teams will be led by the University of Calgary's Casey Hubert, associate professor in the Faculty of Science and Campus Alberta Innovation Program Chair in Geomicrobiology, and University of Manitoba's Research Professor Gary Stern, Centre for Earth Observation Science. They will combine their expertise in the areas of genomics, microbiology, petroleomics and sea-ice physics to investigate the potential for natural microbial communities to mitigate oil spills, as warmer temperatures and melting sea ice usher in increasing shipping throughout Arctic waters. "Bioremediation in the cold Arctic and in the presence of sea ice remains poorly understood," Hubert says. "By developing a better understanding of how Arctic microbes will be mobilized in the event of a spill, we can better model and map what will happen and what our response should be, should an accidental spill ever occur," says Hubert. With northern shipping increasing by 166 per cent since 2004, and cruise ships and tourism increasing by 500 per cent in the past five years, the pressures on the Northwest Passage have never been greater. The Passage represents a sea route connecting the northern Atlantic and Pacific Oceans through the Arctic Ocean, along the northern coast of North America via waterways through the Canadian Arctic Archipelago, which has never been busier. "The expertise that Manitoba brings to the table are in the areas of petroleomics and sea ice physics as well as our new facility [under construction in Churchill, Manitoba] that will allow us to study oil degradation processes under controlled Arctic conditions," says Stern. The soon-to-be-completed Churchill Marine Observatory (CMO) is a globally unique, highly innovative, multidisciplinary research facility located in Churchill, Manitoba, adjacent to Canada's only Arctic deep-water port. The CMO will directly support the technological, scientific, and ethical, environmental, economic, legal and social research that is needed to safely guide (through policy development) the unprecedented Arctic marine transportation and oil and gas exploration and development throughout the Arctic. The University of Calgary is partnering closely with the University of Manitoba on this CFI-sponsored initiative, which is being built at the perfect time to support the new Genome Canada project. "The idea is that we will be able to emulate different thermodynamic states of the sea-ice and how, under these conditions, different crude and fuel oils will interact with native microbial populations in a controlled environment," Stern adds. The 2015 LSARP competition aims to support applied research projects focused on using genomic approaches to address challenges and opportunities of importance to Canada's natural resources and environment sectors, including interactions between natural resources and the environment, thereby contributing to the Canadian bioeconomy and the well-being of Canadians. "Climate change may present the opportunity for year-round shipping traffic along Canada's Arctic coast. The work of the GENICE team on genomics-based bioremediation will help Canadian companies and agencies be better prepared to mitigate the environmental impact of expanding industrial activities in the Arctic." Reno Pontarollo, President & CEO, Genome Prairie notes. "Casey Hubert and Gary Stern are working to address the growing pressures on Arctic marine environments, while also offering insights into protecting other coastal areas in Canada," notes John Reynolds, acting vice-president (research) at the University of Calgary. "We thank Genome Canada and their subsidiaries, as well as the wide range of partners who have come together to support this project." The project will be managed by Genome Alberta in conjunction with Genome Prairie and with an international collaboration of funding partners that have shown the desire to protect the complex Arctic environment: Genome Canada, Alberta Economic Development and Trade, University of Manitoba, Natural Resources Canada, Arctic Institute of North America, Arctic Research Foundation, Stantec Consulting Ltd., National Research Council of Canada, Research Manitoba, University of Calgary Petroleum Reservoir Group, University of Newcastle Upon Tyne, Georgia Institute of Technology, Churchill Northern Studies Centre, Amundsen Science Inc., Environment and Climate Change Canada, Genome Quebec, Aphorist, and Aarhus University. About the University of Calgary The University of Calgary is making tremendous progress on its journey to become one of Canada's top five research universities, where research and innovative teaching go hand in hand, and where we fully engage the communities we both serve and lead. This strategy is called Eyes High, inspired by the university's Gaelic motto, which translates as 'I will lift up my eyes.' For more information, visit ucalgary.ca. Stay up to date with University of Calgary news headlines on Twitter @UCalgary. For details on faculties and how to reach experts go to our media center at ucalgary.ca/mediacentre About the University of Manitoba For nearly 140 years, the University of Manitoba has been recognized as Manitoba's premier university - shaping our leaders, enhancing our community, and conducting world-class research. Our home is Manitoba but our impact is global. The university has a tradition of excellence in research, scholarly work and creative activities. Our connection to the agricultural and natural landscapes of the Canadian Prairie, to the Arctic, to local and Indigenous communities, has shaped our research focus. We have made pioneering contributions in many fields and developed life-changing solutions to problems faced by peoples in Manitoba, Canada and the world. About Genome Alberta Genome Alberta is a publicly funded not-for-profit genomics research funding organization based in Calgary, Alberta but leads projects at institutions around the province and participates in a variety of other projects across the country. In partnership with Genome Canada, Industry Canada, and the Province of Alberta, Genome Alberta was established in 2005 to focus on genomics as one of the central components of the Life Sciences Initiative in Alberta, and to help position genomics as a core research effort. For more information on the range of projects led and managed by Genome Alberta, visit http://GenomeAlberta.ca