A fourth version of proposed ASHRAE Standard 188P, Legionellosis: Risk Management for Building Water Systems, is open for public comment until Nov. 10, 2014.
Standard 188P, currently under development, establishes minimum legionellosis risk-management requirements for building water systems. The standard is intended for use by building owners and managers and those involved in the design, construction, installation, commissioning, operation, maintenance, and service of centralized building water systems and components.
Changes to the proposed standard since its last public review in January 2013 include:
- Alignment of the document with the revised title, purpose, and scope.
- Removal of hazard-analysis-and-critical-control-points (HACCP) terminology, as some of the principles of the HACCP process are consistent with the process utilized in the document.
- Inclusion of a normative appendix providing an alternate compliance path for health-care facilities meeting certain requirements.
- More emphasis on requirements for design, construction, installation, commissioning, operation, maintenance, and service.
Tom Watson, chair of the Standard 188P committee, said the standard contains both normative sections and appendices that specify what is required to comply. It also contains informative appendices and references providing guidance on how to perform tasks that may be necessary for a given building water system.
“Building water systems vary substantially in their design and their capability for transmission of Legionella,” Watson said. “Scientific evidence is either lacking or inconclusive in certain aspects of Legionella control. The informative guidance is included to provide suggestions, recommendations, and references.”
For more information and to comment, go to www.ashrae.org/publicreviews.