Wind Engineering

Pedestrian Comfort

Air Quality

Exhaust Stack & Air
Intake Solutions

Sun / Shade / Glare

Snow Engineering

Ventilation

Noise, Acoustics & Vibration

Hazard & Risk

Computational Fluid Dynamics (CFD)

Regional Airshed Modeling

Regulatory Permitting

Stack & Field Testing

Laboratory Services

Master Planning

Sustainable Design

Protective Ventilation

Air Quality

 Air Quality (Industrial / Environmental)

Typical projects:

  • Involved in Environmental Impact Assessments for industry, airports, and roads and highway vehicle emission impacts on public / residences
  • Industrial stack and field testing, source characterization, permitting, regional impact modeling
  • Automotive paint shop solvent dispersion impacts
  • Landfill odor impacts on residential areas
  • Fugitive dust impact / control studies for the aggregate industry
  • Recommending cost effective air pollution control equipment

RWDI air quality services:

Regulatory Permitting

Permits, approvals and licences for provincial regulators.

Regulatory Modeling

For environmental applications, approvals and impact assessments required for new and expanded industrial facilities.

Regional Airshed Modeling

Evaluate urban smog, ground-level ozone, fine particles and deposition for urban and rural areas.

Accidental Release Modeling

Assess accidental releases from multi-phase, heavier-than-air, neutrally-buoyant, transient and steady-state releases.

Source and Emission Inventories

Identify and characterize point, line, area and mobile emission sources.

Meteorological Analysis

Review airport and site-specific meteorological data for dispersion characterization.

Climate Assessments

Assess climate for project design.

Physical Modeling

Resolve complex airflow problems through wind tunnel testing.

Technology Evaluation

Assess stack design, incinerator temperature and emission control optimization.

Monitoring Support

Design ambient air quality monitoring networks and meteorological monitoring programs.

Specialized Field Programs

Provide ambient monitoring, flux measurements, meteorology monitoring and time-lapse photography.

Public Involvement and Expert Testimony

Provide support for public involvement processes and expert testimony at regulatory hearings.

RWDI resources:

Industrial Facility Dispersion Models

Regulatory models include SCREEN3, ISCST3, RTDM, AERMOD, ISC-PRIME and CALPUFF.

Accidental Release Dispersion Models

Focus on transient / steady-state releases and buoyant / heavier-than-air releases; these include SLAB, HGSYSTEMS and GASCON2.

Regional Scale Dispersion Modeling Tools

Include MM5, CALMET, CALPUFF, CALGRID and Models-3.

Wind Tunnels 

Scale model testing to resolve complex flow regimes in the vicinity of building complexes and elevated terrain features.

Computational Fluid Dynamics (CFD) Testing

Predict complicated flows and particle trajectories in localized areas.

Computer Resources

State-of-the-art workstations, 2-D and 3-D presentation graphics and animation software.

Additional information:

State of the Air 2006 in British Columbia
Roadway Studies (Environmental Solutions) Brochure
Third Canadian Workshop on Air Quality
Designing Air Distribution Devices
Odour Control and Stack Exit Velocity


    Industrial emission
    Wind tunnel testing
    air quality testing
    Air quality modeling
    Air quality contours