Approaching Cumulative Effects through Air Pollution Modelling
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The research presented here represents a segment of a cumulative impact assessment of resource development in northeastern British Columbia. It considers point and area source emissions of sulphur and nitrogen oxides (SO2 and NO x , respectively), over a 2,156-km2 area. With the exception of open burning, all emissions are from Upstream Oil and Gas (UOG) sector sources (SO2, n = 103; NO x , n = 250; area, n = 25). AERMOD View™ was used to estimate the maximum potential concentration and deposition of these pollutants over 1-h, 3-h, 24-h, and annual averaging periods. Results are compared with various thresholds and limits from the policy and scientific literature to assess the potential cumulative effects of these pollutants. Of the thresholds employed, exceedances of the 1-h and 24-h NO x concentrations and the annual SO2 concentration are predicted. There were no predicted exceedances of annual deposition thresholds (i.e., “Critical Loads”). Maximum predicted concentrations vary between compounds and are related to boundary layer stability, elevation, and distance from sources. Comparison with nearby monitoring data indicated that predicted concentrations were reasonable and that AERMOD provides a useful tool for approaching the potential cumulative impacts of air pollution from multiple sources. While the accuracy of Gaussian-based annual deposition estimates is questioned, model enhancements that could extend the application to more comprehensive assessments are suggested. Lastly, the implications of predicted threshold violations for forest ecosystems and local forest-dependent First Nations communities are discussed.
KeywordsSulphur and nitrogen oxides AERMOD Upstream oil and gas Air quality standards Critical loads Cumulative impacts
Thanks to David Niemi and Roy McArthur of Environment Canada for providing emissions data, Michael Rensing BC Ministry of the Environment for providing CMAQ_ACE data, Judy Chow of the Desert Research Institute for guidance on particulate size fractions, Jason Redman of Lakes Environmental for outstanding technical support, Rob Kemp of Levelton Engineering and Peter Reid of Jaques Whitford for discussions on flare stack parameters, Wayne Boulton and Michael VanAltena of RWDI for their time and technical guidance, Roland Stull for sharing his wisdom on atmospheric processes, and John Innes for his support and helpful comments on the manuscript.
- Atanasiu, L. (1969). Photosynthesis and respiration of some lichens during winter. Revue Roumaine de Biologie Series Botanica, 14(165), 168.Google Scholar
- BC Ministry of Energy, Mines and Petroleum Resources (2005a). Digital geology map of British Columbia, Release 1.0. http://www.empr.gov.bc.ca/Mining/Geoscience/PublicationsCatalogue/DigitalGeologyMaps/Pages/default.aspx Accessed 5 May 2009.
- BC Ministry Energy, Mines and Petroleum Resources (2005b). Service plans, C. Performance measures and targets, Goal #1. July 13, 2005.Google Scholar
- BC Ministry Energy, Mines and Petroleum Resources (2009). Oil and gas industry reaches out to community. News Release 2009EMPR0016-000405.Google Scholar
- BC Ministry of Environment (2008). Guidelines for air quality dispersion modelling in British Columbia. Environmental Protection Division, Environmental Quality Branch, Air Protection Section, Victoria BC. 148 pp. http://www.env.gov.bc.ca/air/airquality/pdfs/air_disp_model_08.pdf Accessed 29 January 2009.
- BC Ministry of the Environment (2009a). Air quality online. http://a100.gov.bc.ca/pub/aqiis/aqi.bulletin?group_name=PRINCE_GEORGE Accessed 13 September 2009.
- BC Ministry of Environment (2009b). Air quality objectives and standards. http://www.env.gov.bc.ca/air/airquality/pdfs/aqotable.pdf Accessed 19 July 2009.
- Bobbink, R., Ashmore, M., Braun, S., Fluckiger, W., & van den Wyngaert, I. (2002). Empirical nitrogen critical loads for natural and semi-natural ecosystems: 2002 update. Environmental Documentation 164, Swiss Agency for the Environment, Forests and Landscape CLC 2000 — Corine Land Cover, CEEA, Copenhagen, 2006.Google Scholar
- Briggs, G. A. (1969). Plume rise. Critical Review Series, U.S. Atomic Energy Commission, 81 pp. [NTIS TID-25075].Google Scholar
- British Columbia (2007). The BC energy plan — A vision for clean energy leadership. Policy Actions, Oil and Gas: Policies 36–55. http://www.energyplan.gov.bc.ca/PDF/BC_Energy_Plan_Oil_and_Gas.pdf Accessed 2 November 2007.
- Bytnerowicz, A., Dueck, T., & Godzik, S. (1998). Nitrogen oxides, nitric acid vapour, and ammonia. In R. B. Flager (Ed.), Recognition of air pollution injury to vegetation — A pictorial atlas. Pittsburgh, PA: Air and Water Management Association.Google Scholar
- Canada (2007a). Notice with respect to substances in the National Pollutant Release Inventory for 2006 — Amendment. Part I: Criteria for Reporting Substances Listed in Part 2 of Schedule 1. Department of the Environment, published under section 71(1)(b) of the Canadian Environmental Protection Act. Canada Gazette 141(9). Ottawa, ON. March 3, 2007; available at http://canadagazette.gc.ca/archives/p1/2007/2007-03-03/pdf/g1-14109.pdf Accessed 12 April 2009.
- Canada (2007b). Canada Gazette. Notice with respect to reporting of information on air pollutants, greenhouse gases and other substances for the 2006 calendar year. Part I 141(9) Supplement: Department of the Environment, published under section 71(1)(b) of the Canadian Environmental Protection Act. Canada Gazette 141(49). Ottawa, ON. December 9, 2007; available at http://canadagazette.gc.ca/archives/p1/2007/2007-12-08/pdf/g1-14149.pdf Accessed 21 June 2008.
- Carou, S., Dennis, I., Aherne, J., Ouimet, R., Arp, P. A., Watmough, S. A., et al. (2008). A national picture of acid deposition critical loads for forest soils in Canada. A report for the CCME Acid Rain Task Group. Winnipeg, MB: Canadian Council of Ministers of the Environment.Google Scholar
- CCME (2009). Regional strategic environmental assessment in Canada: Principles and guidance. Canadian Council of Ministers of the Environment, Winnipeg, MB. http://www.ccme.ca/ourwork/environment.html?category_id=135 Accessed 29 July 2009.
- Duhamel, R. (1966). Treaty No. 8. Made June 21, 1899, and Adhesions, Reports, Etc. Queen's Printer and Controller of Stationary, Ottawa. http://www.ainc-inac.gc.ca/al/hts/tgu/pubs/t8/trty8-eng.asp Accessed 12 June 2009.
- Environment Canada (2008). 2008 Facility & Substance Information for SPECTRA ENERGY TRANSMISSION — McMahon Gas Plant http://www.ec.gc.ca/pdb/websol/querysite/facility_substance_summary_e.cfm?opt_npri_id=0000004305&opt_report_year=2008 Accessed 10 March 2010.
- Environment Canada (2009). Alternative threshold framework modelling proposal for the National Pollutant Release Inventory. http://www.ec.gc.ca/inrp-npri/default.asp?lang=en&n=94856B00-1 Accessed 10 March 2009.
- ERCB — Energy Resources Conservation Board of Alberta (2006). Directive 060: Upstream petroleum industry flaring, Incinerating and Venting. Calgary, Alberta: ERCB.Google Scholar
- Findlay, D. (2003). Response of phytoplankton communities to acidification and recovery in Killarney Park and the Experimental Lakes Area, Ontario. Ambio, 32, 190–195.Google Scholar
- Goward, T. (1999). The Lichens of British Columbia — Illustrated Keys — Part 2 — Fruticose Species. British Columbia Ministry of Forests Research Program, Special Report. 326 pp. Victoria, BC. http://www.for.gov.bc.ca/hfd/pubs/Docs/Srs/Srs09.pdf Accessed 28 August 2009.
- Guigard, S. E., Kindzierski, W. B., & Harper, N. (2000). Heat radiation from flares. Report prepared for Science and Technology Branch, Alberta Environment, ISBN 0-9985-1188-X, Edmonton Alberta.Google Scholar
- Hanna, S. R., Egan, B. A., Purdum, J., & Wagler, J. (2001). Evaluation of the ADMS, AEMROD, and ISC3 dispersion models with the OPTEX, Duke Forest, Kincaid, Indianapolis and Lovett filed datasets. International Journal of Environment and Pollution, 16(1–6), 301–314.Google Scholar
- Katz, M., Ledingham, G. A., & McCallum, A. W. (1939). Symptoms of injury on forest and crop plants. In M. Katz & F. E. Lathe (Eds.), Effects of sulphur dioxide on vegetation. Prepared for the Associate Committee on Trail Smelter Smoke (pp. 51–103). Ottawa: National Research Council of Canada, Ottawa.Google Scholar
- Krupa, S. V., Tonneijick, A. E. G., & Manning, W. J. (1998). Ozone. In R. B. Flager (Ed.), Recognition of air pollution injury to vegetation — A pictorial atlas (pp. 2-1–2-28). Pittsburgh, PA: Air and Waste Management Association.Google Scholar
- Legge, A. H. (1990). Chapter 2: Sulphur and nitrogen in the atmosphere. In A. H. Legge & S. V. Krups (Eds.), Acidic deposition sulphur and nitrogen oxides. The Alberta governemnt/industry acid deposition research program (pp. 3–128). Chelsea, MI: Lewis.Google Scholar
- Legge, A. (1995). An environmentally significant flare event from a sour gas processing plant: Proposed quantitative definitions. Prepared for Westcoast Energy Inc. Biosphere Solutions. Calgary, Alberta. February 11, 1995. www.ogc.gov.bc.ca/documents/publications/reports/biosphere%20solutions.doc Accessed 29 July 2009.
- Legge, A. H., Jäger, H.-J., & Krupa, S. (1998). Sulphur dioxide. In R. B. Flager (Ed.), Recognition of air pollution injury to vegetation — A pictorial atlas. Pittsburgh, PA: Air and Water Management Association.Google Scholar
- Lundgren, J. (2003). Dispersion analysis of flared sulphur dioxide emissions for the Kwoen Gas Processing Plant, 2002 Annual Report. Levelton Engineering. Prepared for Duke Energy Inc., Fort St. John, BC. 26 pp.Google Scholar
- Massey, N. W. D., MacIntyre, D. G., Desjardins, P. J., & Cooney, R. T. (2005). Digital map of British Columbia: Tile N10 Northeast B.C., B.C. Ministry of Energy and Mines, Geofile 2005-10. http://www.empr.gov.bc.ca/Mining/Geoscience/PublicationsCatalogue/DigitalGeologyMaps/Pages/default.aspx Accessed 17 May 2009.
- McGuigan, E. K. (2006). Of moose and man: Collaborating to identify first nations' priorities for cumulative impact assessment in Northeast British Columbia. M.Sc. Thesis, Faculty of Graduate Studies, The University of British Columbia.Google Scholar
- Meidinger, D., & Pojar, J. (1991). Ecosystems of British Columbia. Victoria BC: BC Ministry of Forests. 330 pp.Google Scholar
- Meteorological Service of Canada (2009). Daily Observation Data, Canada's National Climate Archive, Fort St. John. http://www.climate.weatheroffice.ec.gc.ca/climateData/hourlydata_e.html?timeframe=1&Prov=BC&StationID=1413&Year=2000&Month=1&Day=1 Accessed 15 January 2009.
- Nilsson, J., & Grennfelt, P. (Eds.). (1988). Critical loads for sulphur and nitrogen: Miljörapport, 1988:15. Nordic Council of Ministers Copenhagen.Google Scholar
- OGC (2008). Oil and Gas Commission of British Columbia. Member login, Data Download. https://quoll.ogc.gov.bc.ca/generic_ogc/Ext_Accnt.Logon Accessed 25 March 2008.
- Perry, S. G., Paine, R. F., Cimorelli, A. J., Venkatram, A., Lee, R. J., & Weil, J. C. (1994). AERMOD: A dispersion model for industrial source applications. Air and Waster Management Association. 94-TA23.04, For Presentation at the 87th Annual Meeting and Exhibition, Cincinnati, Ohio. June 19–24, 1994.Google Scholar
- Reible, D. D. (1998). Fundamentals of environmental engineering. CRC Press, ISBN 1566700477, 9781566700474. pp. 243–246.Google Scholar
- Sander, R. (1999). Compilation of Henry's Law constants for inorganic and organic species of potential importance in environmental chemistry (version 3). http://www.mpchmainz.mpg.de/Bsander/res/henry.html Accessed 17 March 2009.
- Science Applications International Corporation (2004). EPA Spatial Allocator User Guide. William Benjey, Thomas Pierce, and Dan Loughlin. United States Environmental Protection Agency National Exposure Research Laboratory Office of Research and Development Research Triangle Park, North Carolina. 44 pp. http://www.ie.unc.edu/cempd/projects/mims/spatial/Spatial_Allocator_UG.pdf Accessed 2 March 2009.
- Soil Landscapes of Canada Working Group (2005). Soil Landscapes of Canada v3.0. Agriculture and Agri-Food Canada (digital map and database at 1:1 million scale). http://sis.agr.gc.ca/cansis/nsdb/slc/v3.0/intro.html Accessed 12 June 2008.
- Tallis, J. H. (1964). Lichens and atmospheric pollution. Advancement of Science, 21, 250–252.Google Scholar
- Tonnesen, G., Wang, Z., Omary, M., & Chien, C. J. (2007). Assessment of nitrogen deposition: Modeling and habitat assessment. California Energy Commission, PIER Energy-Related Environmental Research. CEC-500-2005-032.Google Scholar
- UNECE-CLRTAP (2004). United Nations Economic Commission — Convention on long-range transboundary air pollution. Manual on methodologies and criteria for modelling and mapping critical loads and levels, and air pollution effects and trends, Berlin, Germany, 202 pp. http://icpmapping.org/cms/zeigeBereich/5/manual_und_downloads.html Accessed 11 June 2008.
- US-EPA (2004). AERMOD Deposition Algorithms — Science Document (Revised Draft). http://www.epa.gov/scram001/7thconf/aermod/aer_scid.pdf Accessed 12 July 2009.