855773644-LEED-v5-BD-C-Reference-Guide-Launch-Edition - Page 470
Extracted Content
HVAC Protection
Construction activities release contaminants that may unintentionally enter the building’s HVAC system. Safeguard against this by avoiding use of HVAC systems during construction or, when use of the system is necessary, by ensuring the equipment has proper filtration during use.
Replace all HVAC filters prior to occupancy and after all construction activities are complete. Additionally, complete all tests and balance efforts after installing the new filters.
Source Control
Building materials that are exposed to the environmental conditions during construction can be soiled or degraded prior to installation. Proper storage and material handling can ensure they are protected from contaminants, dirt, debris, and moisture during the construction process.
If there is enough storage capacity on site, keep materials in a separate, ventilated or conditioned building or storage area. Keep materials away from heavy traffic areas to limit exposure to dirt, debris, and dust. Absorptive materials like carpet, ceiling panels, wall coverings, and insulation can trap moisture, leading to mold and mildew growth. Cover or raise these materials off the floor.
Pathway Interruption
Certain construction activities, such as cutting, sawing, sanding, and painting, can result in emissions of airborne contaminants into the interior space. Their migration to adjacent spaces can result in inadvertent exposure to contaminated air, dust, debris, and odors. Proper hazard identification and appropriate control measures are necessary to safeguard health.
Control measures include the use of personal protective equipment, and the use of temporary barriers to isolate emissions and prevent their spread into adjacent spaces. Examples of isolation techniques include sealing doors and windows, tenting areas with high levels of activity, or using dust guards or collectors on power tools. Additionally, when installing manufactured countertops, implement dust control measures and use personal protective equipment when sawing or sanding. [ 147]
For entryways and indoor pathways between construction areas and other interior spaces, use walk-off mats to minimize migration of dirt and pollutants into clean areas.
147 “Worker Exposure to Silica during Countertop Manufacturing, Finishing and Installation”, (n.d.), OSHA NIOSH Hazard Alert (Number 2015-106), Occupational Safety and Health Administration (OSHA), the National Institute for Occupational Safety and Health (NIOSH), https://osha.gov/sites/default/files/publications/OSHA3768.pdf.
U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 460