855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 233
Extracted Content
| Contaminant (CAS#) | Concentration limit (µg/m3) | Allowed test methods (laboratory-based) |
|---|---|---|
| EPA TO-15 | ||
| Formaldehyde 50-00-0 | 20 µg/m3 (16 ppb) | ISO 16000-3, 4; EPA TO-11a; EPA comp. IP-6A; ASTM D5197-16 |
| Acetaldehyde 75-07-0 | 140 µg/m3 | 140 µg/m3 |
| Benzene 71-43-2 | 3 µg/m3 | ISO 16000-6; EPA IP-1; EPA TO-17; EPA TO-15; ISO 16017-1, 2; ASTM D6196-15 |
| Hexane (n-) 110-54-3 | 7,000 µg/m3 | 7,000 µg/m3 |
| Naphthalene 91-20-3 | 9 µg/m3 | 9 µg/m3 |
| Phenol 108-95-2 | 200 µg/m3 | 200 µg/m3 |
| Styrene 100-42-5 | 900 µg/m3 | 900 µg/m3 |
| Tetrachloroethylene 127-18-4 | 35 µg/m3 | 35 µg/m3 |
| Toluene 108-88-3 | 300 µg/m3 | 300 µg/m3 |
| Vinyl acetate 108-05-4 | 200 µg/m3 | 200 µg/m3 |
| Dichlorobenzene (1,4-) 106-46-7 | 800 µg/m3 | 800 µg/m3 |
| Xylenes — total 108-38-3, 95-47-6, and 106-42-3 | 700 µg/m3 | 700 µg/m3 |
REQUIREMENTS EXPLAINED
This credit offers three options to identify opportunities for indoor air quality (IAQ) improvement over time. Airborne contaminants can enter a building from outdoors or be introduced by indoor sources and activities, such as cleaning, cooking, candles, 3D printers, or improperly vented heating appliances. Understanding indoor air quality can help identify contaminants to inform a strategy to provide healthy indoor spaces.
Option 1 encourages continuous monitoring and rewards projects that achieve cleaner indoor air targets while Options 2 and 3 require one-time testing for air quality or individual VOCs. More points are included for Option 1 as continuous monitoring better captures the temporal and seasonal variation of the indoor air quality conditions and likely requires more investment to implement and maintain over time.
Projects can enhance their IAQ performance by combining one-time testing with continuous monitoring. This layered strategy allows for a more nuanced view of IAQ over time. One-time testing can be implemented before or during continuous monitoring setup to establish baseline initial air quality conditions, while continuous monitoring tracks changes and fluctuations over
U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 223