WTS | First Defense utilizes procedures from both OSHA Section III Chapter 7, ASHRAE Standard 188, and ASHRAE guideline 12-2000 for minimizing the risk of Legionella associated with building water systems. Inspections are performed to confirm systems are clean to eliminate the source of nutrients for Legionella and other forms of bacteria.
Maintain consistent water treatment program
Ensure good solids/bleed control
Employ two different biocides, oxidizer and non-oxidizer
Clean cooling towers at least twice per year