Drift Emissions Consulting and Testing

CleanAir staff have a long history of cooling tower emissions and consulting. Our staff participated in the original development and currently chair the code writing committee for ATC-140, the CTI test code for cooling tower emissions.

Our staff routinely write drift emissions test protocols for submission by our clients for regulatory approval. These site-specific test plans address the unique nature of cooling tower emissions tests including:

• Test methodology and instrument description
  
• Test duration
  
• Plant support requirements
  
• Tower operating and environmental requirements
  
• Test report distribution

The site-specific test plan provides a means to educate those not familiar with cooling tower emission testing so that all of the test participants will have a common platform for discussion of the test methodology and basic understanding of the test requirements and objectives.

Our staff have participated as expert witnesses in several cooling tower litigation events involving drift emissions and drift deposition. We have generated source terms for deposition modeling of historic cooling towers. Source term development for historical cooling tower arrays included generation of drift droplet size distribution, fan stack diameters and release height, exhaust temperature, hours of operation, likely chromate concentrations, waterflow rates and drift emission rates.