Air Monitoring & Modelling

Not Just for Permitting Anymore

Regulatory | Complaint-Driven | Troubleshooting

Types of Air Modelling

  1. Screening to quickly check air quality from a variety of operating parameters and emission control strategies and devices, as well as determining ambient impact and resulting allowable production when siting a new source, especially minor ones.
  2. Dispersion modelling is required for certain major sources and from other regulations.
  3. Other types of air pollution transport equations are modelled. For example US EPA and State regulatory codes contain equations and engineering guidance for various compliance demonstration procedures such as Root Cause Analysis and resulting Corrective Action Plans for their increasing Fenceline Monitoring requirements.

Typical Air Monitoring Services

  • Criteria pollutants: TSP H2S SO2 NO2 CO PM-10 Ozone Lead
  • Meteorological Data – Typical parameters include: temperature, humidity, rainfall, radiation, evaporation, wind speed, wind direction and Sigma Theta
  • Non-criteria air toxics, metals and volatile organics (TO – 1 through TO -14 methods, NIOSH/OSHA methods)

Specific Air Modelling Services Include

  • Determining impact of existing and new sources and assistance in obtaining necessary permits.
  • Use of the EPA GEP guidelines to determine best location and height for a new stack.
  • Determining possible methods of control and their effect on potential impact.
  • Determining impact due to fuel switching (coal/gas/fuel oil).
  • Determining impact of changing stack height, flow rates or temperature.
  • Determining impact of new standards such as a one hour SO2 standard.
  • Statistically correlating monitoring data to modeling data and determining trend analysis (actual data to predicted data).
  • Use of dispersion modeling to select monitoring site locations through the execution of EPA guideline models.
  • Determining possible site locations for new facilities

Shell Coverage also offers Modelling/Monitoring for Compliance/Enforcement needs, or to provide technical response for public concerns including court orders.