Air Quality

Air emissions, particulate matter, dust monitoring, atmospheric chemistry

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Environmental Assessment Panel Hearing Presentations, BHP Diamond Mine (Ruari Carthew, February 1996)
23 February 1996Presentation
Two pieces of testimony presented to the Environmental Assessment Panel during the BHP Diamond Mine hearing on February 23, 1996: first, a 16-year-old's account of experiencing the pristine tundra ecosystem and concerns about human impact on wildlife; second, Gatorzelle Mackenzie's testimony summarizing her father's Dogrib perspective on land rights, historical treaty agreements, and contemporary environmental and social concerns affecting the Dogrib people.
Traditional Knowledge Tłı̨chǫ Wildlife Air Quality
Notes for a Submission to the BHP Environmental Assessment Review Panel (Chris O'Brien, February 1996)
23 February 1996Regulatory Filing
Chris O'Brien's detailed submission to the BHP EARP panel opposing the Ekati Diamond Mine project on grounds that gem diamond production does not justify ecological destruction of the Barrenlands, arguing for stricter environmental assessment, ecosystem-based management conditions, and a shift toward ecologically sustainable economic development in the NWT.
Development Plans Wildlife Correspondence Caribou
Vegetation, Landscape and Ecosystem Assessment, Public Hearing Presentation by Dr. Joseph Svoboda (Northern Environmental Coalition, February 1996)
21 February 1996Regulatory Filing
Dr. Joseph Svoboda's abbreviated EIS assessment of vegetation, landscape, and ecosystem impacts of the proposed BHP diamond mining project at Lac de Gras identifies significant deficiencies in baseline studies and recommends comprehensive ecosystem-level monitoring, habitat restoration protocols, and meaningful Aboriginal participation in the evaluation process.
Development Plans Closure & Reclamation Wildlife Greenhouse Gas
Public Hearing Technical Session on Environmental Management Plans, Northwest Territories Diamonds Project (Federal Environmental Assessment Panel, February 1996)
16 February 1996Report
This is a transcript of the Federal Environmental Assessment Panel's public hearing technical session on February 16, 1996, reviewing BHP Diamonds Inc.'s Northwest Territories Diamonds Project environmental management plans. BHP presented comprehensive environmental management strategies covering air quality, water, waste, tailings, traffic, wildlife, aquatic life, reclamation, and closure, along with monitoring and adaptive management approaches designed to minimize environmental impacts of the proposed diamond mine near Lac de Gras.
Development Plans Environmental Agreement Air Quality
Environmental Management Plans Technical Session Submission, NWT Diamonds Project Environmental Assessment Review Hearings (Lutsel K'e Dene First Nation, February 1996)
16 February 1996Regulatory Filing
Lutsel K'e First Nation presents formal submission to the NWT Diamonds Project Environmental Assessment Review, expressing concerns about inadequate Environmental Impact Statement review, insufficient consultation of traditional knowledge, and deficiencies in management plans for air quality, traffic, water, materials, wildlife, aquatic life, and reclamation.
Development Plans Traditional Knowledge Air Quality
Public Hearing Technical Session Transcript, Environmental Management Plans, BHP NWT Diamonds Project (MVEIRB, February 16, 1996)
16 February 1996Meeting Minutes
Technical session of the Federal Environmental Assessment Panel review of BHP Diamonds Inc.'s proposed Northwest Territories diamond mine project near Lac de Gras, featuring presentations by BHP on comprehensive environmental management plans for air quality, water, waste, tailings, wildlife, aquatic life, traffic, and reclamation, with particular emphasis on frozen-core dam design for tailings containment and adaptive management strategies.
Development Plans Environmental Agreement Air Quality
General Session Submission, BHP Diamond Project Environmental Assessment Review Panel Public Hearing (Ecology North, February 1996)
14 February 1996Presentation
Charles Laird presents Ecology North's submission to the BHP Diamond Project Environmental Assessment Review Panel, advocating for rigorous cumulative impact assessment, adequate government resources for regulation, establishment of protected areas prior to development, and resolution of aboriginal land claims before project approval.
Development Plans Environmental Agreement Correspondence Traditional Knowledge
Submission to the General Session, BHP Diamond Mine Environmental Assessment Panel (Joachim Obst, February 1996)
14 February 1996Presentation
Joachim Obst submits a critical public comment to the BHP Diamond Mine Environmental Assessment Panel expressing concerns about inadequate disclosure of radiological and chemical contamination risks, particularly regarding high radium-226 levels and the proponent's downplaying of hazards to Dene elders in light of the historical Rae Rock Uranium Mine impacts.
Correspondence Development Plans Water Quality
Submission to the BHP NWT Diamonds Project Public Hearings (Environment Canada, February 1996)
12 February 1996Regulatory Filing
Environment Canada's comprehensive submission to the Federal Environmental Assessment Panel for the BHP NWT Diamonds Project at Lac de Gras, providing technical evaluation of environmental impacts across emergency response, air quality, water resources, and wildlife, with detailed recommendations for monitoring, contingency planning, and mitigation measures for approval and operation of the mine.
Development Plans Water Quality Air Quality
Public Hearing Transcript, General Session, BHP Diamonds NWT Diamonds Project (Multiple parties, February 12, 1996)
12 February 1996Meeting Minutes
Federal Environmental Assessment Panel public hearing on BHP Diamonds Inc.'s proposed Northwest Territories diamond mine project near Lac de Gras, held in Yellowknife on February 12, 1996. The hearing included BHP's project overview presentation covering mining operations, environmental baseline studies, wildlife and water management, and socio-economic benefits, followed by questioning from the panel, government agencies, aboriginal organizations, and environmental groups on environmental compliance, land claims, caribou impacts, and corporate accountability.
Development Plans Traditional Knowledge Wildlife Air Quality
Submission to Environmental Assessment Review Panel (Erica Abel, Weledeh Catholic School, Yellowknife, February 9, 1996)
9 February 1996Presentation
A fourteen-year-old student from Ndilo addresses mining impacts on the environment and Indigenous hunting rights, expressing concerns about air and water pollution from mines and questioning restrictions on hunting caribou and other wildlife on ancestral lands.
Traditional Knowledge Yellowknives Dene Air Quality
Public Hearing Transcript, Northwest Territories Diamonds Project, Lutsel K'e (Multiple parties, January 1996)
29 January 1996Meeting Minutes
Federal Environmental Assessment Panel public hearing in Lutsel K'e on January 29, 1996, reviewing BHP Diamonds Inc.'s proposal to develop a diamond mine at Lac de Gras in the Northwest Territories. The hearing includes presentations by the panel, BHP representatives, Lutsel K'e First Nations leadership, and community members expressing concerns about environmental impacts, aboriginal rights, traditional land use, and past experiences with mining development.
Development Plans Traditional Knowledge Regulatory Air Quality
Public Hearing Transcript, Rae-Edzo, Northwest Territories (Multiple parties, January 1996)
25 January 1996Report
Federal Environmental Assessment Panel public hearing in Rae-Edzo on January 25, 1996, reviewing BHP Diamonds Inc.'s proposed diamond mine development in the Lac de Gras area of the Northwest Territories. The hearing included presentations by BHP on the project proposal and environmental studies, followed by community presentations from Dogrib people expressing concerns about land rights, caribou impacts, and demands for a written impact benefits agreement before project approval.
Development Plans Traditional Knowledge Wildlife
Public Hearing Transcript, Rae Lakes (Federal Environmental Assessment Panel, January 23, 1996)
23 January 1996Report
Federal Environmental Assessment Panel public hearing held in Rae Lakes on January 23, 1996, to review BHP Diamonds Inc.'s proposed Northwest Territories diamonds project near Lac de Gras. BHP presented detailed plans for mine development, environmental studies, and socio-economic benefits, while Dogrib leaders and community members expressed concerns about environmental contamination, wildlife impacts, land rights, and the need for formal agreements respecting their traditional land use and governance.
Development Plans Traditional Knowledge Water Quality Air Quality Regulatory
Wind Blown Snow, Sublimation, Transport and Changes to Polar Snow (National Hydrology Research Institute, 1996)
~1996Report
Approximate date — inferred from filename
This academic paper reviews the physics and chemistry of wind-blown snow in polar regions, examining how wind transport, sublimation, and atmospheric processes alter snow accumulation rates and chemical composition. The authors present models for calculating blowing snow transport and sublimation fluxes, discuss mechanisms of chemical transformation including scavenging and volatilisation, and synthesize experimental evidence from Antarctic, Arctic, and temperate locations to explain spatial and temporal variations in ice core chemistry.
Monitoring Air Quality Water Quality
Effects on Air Quality, EIS Additional Information Response, Section 12 (BHP Billiton, December 1995)
15 December 1995Regulatory Filing
This response to a BHP Review Panel request presents worst-case air quality dispersion modelling results for nitrogen dioxide, sulphur dioxide, and total suspended particulates at the Ekati Diamond Mine for years 2000 and 2006, demonstrating that predicted concentrations remain below or at Canadian Ambient Air Quality Objectives. The document details revised emission factors, meteorological data, mixing heights, and proposes monitoring programs including lichen biomonitoring to verify model predictions and detect impacts on local flora.
Air Quality Particulate Matter Monitoring Regulatory
Baseline Study Update, Meteorology, Hydrology and Water Quality, Ekati Diamond Mine (BHP Billiton, December 1995)
1 December 1995Report
BHP Diamonds Inc.'s 1995 baseline study update on meteorology, hydrology, and water quality for the NWT Diamonds Project (Ekati) documents continued monitoring showing 40% higher precipitation than 1994, elevated surface water flows approaching 1-in-100 year event levels, and localized water quality impacts in Kodiak Lake from the Panda Lake Diversion Channel construction, while downstream water quality at Slipper Lake outlet remained unchanged.
Monitoring Water Quality Air Quality Regulatory
Meteorology, Hydrology and Water Quality 1995 Baseline Study Update (BHP Billiton, December 1995)
1 December 1995Report
This 1995 baseline study update reports meteorological, hydrological, and water quality monitoring for the NWT Diamonds Project (Ekati Mine) in the Koala/Long Lake watershed. The year was characterized by significantly higher precipitation (40% above 1994 and baseline estimates), resulting in elevated streamflows and lake levels that approached 1-in-100-year flood event magnitudes, with observed peak flows correlating well with regional historical data; water quality analysis showed localized effects in Kodiak Lake and elevated metals in the Panda Diversion Channel, though no significant changes were observed in Slipper Lake, the watershed outlet.
Monitoring Water Quality Air Quality Development Plans
Assessment of Impact Significance Methodology, NWT Diamonds Project EIS (BHP Billiton, December 1995)
~1995Regulatory Filing
Approximate date — inferred from filename
This document is a response to panel questions regarding the assessment methodology for impact significance in the NWT Diamonds Project Environmental Impact Statement. It explains how six impact attributes (geographic extent, duration/frequency, reversibility, ecological/social context, probability, and future resource capacity) were integrated into a two-dimensional significance matrix based primarily on spatial and temporal criteria to classify residual environmental effects as major, moderate, minor, or negligible.
Development Plans Wildlife Caribou Air Quality
Ecological Mapping 1995 Baseline Study Update, NWT Diamonds Project, Lac de Gras (BHP Billiton, December 1995)
1 December 1995Report
BHP Diamonds Inc. conducted a 1995 baseline ecological mapping study of the 190,000-hectare NWT Diamonds Project area near Lac de Gras, classifying 11 tundra ecosystem types and assessing their sensitivity to development impacts. The report provides integrated terrain and vegetation maps, wildlife habitat capability assessments for geese, caribou and grizzly bears, and evaluations of ecosystem vulnerability to vehicular traffic and air quality impacts.
Monitoring Habitat Assessment Caribou

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