Technical Technical growth . It has been recommended to check cooling water chemistry , pH levels and total bacteria count a minimum of twice a week . Monitoring and testing may be accomplished by sampling the water .
Testing should be done regularly . Routine monitoring can help to evaluate the effectiveness of the water management programme . Interpreting Legionella monitoring data must also include how to respond to certain Legionella levels . If high Legionella levels are found , the water treatment programme should be adjusted as needed . Although there is no established Legionella concentration necessary to cause an outbreak , levels above 10 CFU / mL ( Colony Forming Units per millilitre ) are commonly considered a cause for concern . Remediation actions may include additional chemical treatment and maintenance procedures .
These days , there is no lack of safety guidance documents , standards , regulations , and policies intended to assist building owners and managers in controlling Legionella in buildings . No list would be complete without mentioning ASHRAE 188 and ASHRAE Guideline 12 . These documents have proven to be industry standards for Legionella risk management and have gained the reputation of being reliable sources for Legionella control . The goal of all such guidelines should always be to ensure the health and safety of the public . The UMC Legionella Task Group is an extensive and diverse group with knowledge and experience in mechanical and plumbing systems .
The recommendations from the UMC Legionella Task Group will provide recommendations to the UMC Technical Committee for consideration to the 2024 edition of the UMC . The UMC continues to address the most important issues to serve the industry and to include all major industry standards within its contents to ensure public health and safety .
The UMC , along with the other IAPMO codes , strives to keep up with the times in which we are living to address the most significant areas of concern within building mechanical systems in our ever-changing world . RACA
" A Legionella management plan should include preventive measures for all systems that present a significant risk of Legionella growth and transmission ."
www . hvacronline . co . za RACA Journal I March 2022 53 RACA Journal I March 2022 53