Environmental Odour Impact Assessment

Why Odour Impact Assessment:
  • Determine the odour levels (frequency, Duration, Concentration) at sensitive receptors.
  • Identify and rank odour sources.
  • Differentiate the odour impact of one plant from neighboring plants.
  • Recommend solutions for odour impact reduction.
  • Determine efficiency of installed odour control technologies.

Conducting Odour Impact Assessment

Odour assessment of a refinery plant must utilize 4 main phases and technologies:

  • Field Odour Patrol using personal olfactometery and portable gas analyzers.
  • Source sampling and olfactometric laboratory analysis
  • Dispersion modeling
  • Reporting

Field Odour Patrol is used for:

Field Odour Patrol is used for:

  • Source identification: determining the sources that need to be sampled and measured using olfactometric laboratories
  • Baseline Study: assess the plants emission at the boundary and at the sensitive receptors (neighboring residents)
  • Contribution Study: assess the impact of other nearby odour causing industries
  • Quality Assurance: assess the accuracy of predicted impact from dispersion model and source sampling by comparing the results to real measured field data.
  • Determine the effect of process events (e.g. flaring) on odour impact of the plant.

Analyzing the Results and Reporting

Using odour patrol plus sampling with dispersion modeling, the data can be analyzed to provide a report outlining:

  • The total impact of the plant on the residents
  • Baseline ambient odour levels (impact of all plants on the residents)
  • Identification and contribution of all sources
  • Ranking of all sources based on their odour contribution
  • Effects of process events on odour impact
  • Efficiency of current odour control plants
  • Required efficiency of future odour mitigation solutions