Pierre River Mine Project

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AIR AENV SIRS 6 – 14 Section 11.1 Request 8b Shell states Overall, the results show that the maximum NO2 predictions near the major NOx emissions sources using ARM are lower than the OLM results. Based on the application of the OLM formulation as noted in Table 1, this statement should be corrected to allow a complete assessment of this component of the EIA. Response 8b The ambient ratio method (ARM) formula is provided in EIA Volume 3, Appendix 3-8, Section 2.3.5 and was applied to each model hour. The formula is provided below for reference. Syncrude North where: Mine [ NO [NO2] = nitrogen dioxide concentration [ppm] 2 −0. 608 = 0. 100× [ NO ] [ NO ] X X [NOx] = oxides of nitrogen concentration [ppm] April 2010 Shell Canada Limited 11-5 CR029 ] The ozone limiting factor (OLM) formula from the Air Quality Model Guideline (AENV 2003) is as follows: If [O3] > 0.9x[NOx] then [NO2] = [NOx] otherwise [NO2] = [O3] + 0.1x[NOx] where: [O3] = ozone concentration [ppm] [NO2] = nitrogen dioxide concentration [ppm] [NOx] = oxides of nitrogen concentration [ppm] Hourly ground-level ozone observations from the Wood Buffalo Environmental Association (WBEA) Fort McKay air quality monitoring station for 2002 were used in the OLM formula. The year 2002 was chosen to coincide with the meteorological data and modelling year. The OLM formula was applied by matching the hourly NOx predictions with the hourly monitored ozone concentrations. Since the background ozone concentrations and the predicted NOx concentrations vary by hour, it is not feasible to show calculations for every hour; however, example values are shown in Table AENV 8-1. These sample calculations show that either the OLM or the ARM method can produce higher NO2 predictions based on the hourly NOx and ozone concentrations. However, based on the results in the May 2009 Pierre River Mine, Supplemental Information, Volume 2, SIR 244, Tables 244-1 to 244-3, the ARM-based 1-hour and 24-hour NO2 predictions are consistently lower than those derived from the OLM when considering locations near the major NOx sources (e.g., active mine areas).
AIR AENV SIRS 6 – 14 Table AENV 8-1: Example Hourly OLM and ARM NO2 Concentrations Hour Predicted NOx Concentration [µg/m³] (ppm) Observed Ozone Concentration [µg/m³] OLM NO2 Concentration [µg/m³] (ppm) ARM NO2 Concentration [µg/m³] (ppm) 1 1,000 (0.532) 0.008 115 (0.061) 147 (0.078) 2 1,050 (0.558) 0.010 143 (0.076) 150 (0.080) 3 900 (0.479) 0.007 146 (0.078) 141 (0.075) 4 800 (0.425) 0.005 127 (0.068) 135 (0.072) 5 850 (0.452) 0.006 179 (0.095) 138 (0.073) Note: Unit conversions from µg/m³ to ppm are based on the molecular weight of NO2 and standard conditions of 25°C and 101.325 kPa. Reference Section 11.1 AENV (Alberta Environment). 2003. Air Quality Model Guideline. Prepared by the Science and Standards Branch, Environmental Services Division, Alberta Environment. Edmonton, AB. March 2003. Request 8c Provide the data and formula used to generate the ARM or OLM NO2 concentrations and provide an example of the calculations to verify the data contained in Tables 244-1 thru 244-3. Response 8c See the response to AENV SIR 8b. Question No. 9 Request Volume 2, SIR 246, Page 20-30. The question that was raised in the SIR was fundamentally: “Will the CWS for PM2.5 be met when engine deterioration is included in the emission estimates?” 9a Provide the details of how the model was employed, including but not limited to the data sets used, their statistical robustness, the numerical analysis, redundancy testing, model confidence and reliability and limitations of the model that allow confirmation of the EIA statements. Response 9a The NONROAD methodology (United States Environmental Protection Agency [US EPA] 2005) for estimating mine fleet emissions includes several key elements. First, it has developed emission factors for different vehicle types and ratings representing steady-state vehicle operation. Second, the NONROAD methodology includes a load factor accounting for the fact that mine vehicles cannot constantly operate at their maximum rated horsepower. Last, it 11-6 Shell Canada Limited April 2010 CR029
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Application for Approval of the Pie
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PIERRE RIVER MINE SUPPLEMENTAL INFO
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CONTENTS LIST OF ILLUSTRATIONS Tabl
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INTRODUCTION OVERVIEW Table 1-1: Gu
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INTRODUCTION NAVIGABLE WATERS Secti
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INTRODUCTION NAVIGABLE WATERS Secti
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Section 2.2 ERRATA EIA, EIA UPDATE
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Section 2.2 ERRATA EIA, EIA UPDATE
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Section 2.3 ERRATA SUPPLEMENTAL INF
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Section 2.3 ERRATA SUPPLEMENTAL INF
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MINING AND PROCESSING ERCB SIRS 3 -
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AIR ERCB SIRS 40 - 45 Request 41b B
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AIR ERCB SIRS 40 - 45 Community Tab
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AIR ERCB SIRS 40 - 45 Local Study A
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WATER ERCB SIRS 46 - 79 Section 7.1
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WATER AENV SIRS 15 - 43 • tempera
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EPEA APPROVALS AENV SIRS 90 - 96 Qu
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GLOSSARY CEAA The abbreviation for
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GLOSSARY ESR The abbreviation for e
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GLOSSARY landform The configuration
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GLOSSARY OSDG The abbreviation for
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GLOSSARY SEWG The abbreviation for
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Pierre River Mine Project

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