LEED v5 BD+C Rating System_November 2025_clean - Page 179
Extracted Content
the table. Measure for a four-hour period and calculate peak concentration for carbon monoxide and average concentration for ozone, PM2.5, and PM10.
Table 2. Limits for PM and Inorganic Gases
| Contaminant (CAS#) | Concentration Limit (µg/m3) | Allowed Test Methods (Laboratory-based) | Direct Reading Instrument Minimum Specifications |
|---|---|---|---|
| Carbon monoxide (CO) | 9 ppm; no more than 2 ppm above outdoor levels | ISO 4224 EPA Compendium Method IP-3 GB/T 18883-2002 for projects in China | Direct calibrated electrochemical instrument with accuracy of ± 3% of reading and resolution of 0.1 ppm NDIR CO sensors with accuracy of 1% of 10 ppm full scale and display resolution of less than 0.1 ppm |
| Particulates (for projects in attainment areas) | ISO class 8 or lower per_ISO 14644-_ 1:2015 OR meet PM 10: 50 μg/m3 PM 2.5: 12 μg/m3 | n/a | Accuracy (±): Greater of 5 μg/m3 or 20% of reading Resolution (±): 5 μg/m3 |
| Particulates (for projects in attainment areas) | ISO class 8 or lower per_ISO 14644-_ 1:2015 OR meet PM 10: 50 μg/m3 PM 2.5: 12 μg/m3 | IP-10A | IP-10A |
| Particulates (for projects in nonattainment areas) | ISO class 8 or lower per_ISO 14644-_ 1:2015 OR meet PM 10: 50 μg/m3 PM 2.5: 35 μg/m3 | n/a | Accuracy (±): Greater of 5 μg/m3 or 20% of reading Resolution (±): 5 μg/m3 |
| Particulates (for projects in nonattainment areas) | ISO class 8 or lower per_ISO 14644-_ 1:2015 OR meet PM 10: 50 μg/m3 PM 2.5: 35 μg/m3 | IP-10A | IP-10A |
| Ozone | 0.07 ppm OR 0.01 ppm for projects pursuing EQc1: Enhanced Air Quality, Option 1, Path 2 | ISO 13964 ASTM D5149-02 EPA designated methods for ozone | Monitoring device with accuracy greater of 5 ppb or 20% of reading and resolution (5 min. average data) ± 5 ppb |
AND/OR
Perform a screening test for TVOC. Use ISO 16000-6, EPA TO-17, or EPA TO-15 to collect and analyze the air sample. Calculate the TVOC value per EN 16516:2017 ; CDPH Standard Method
U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, November 2025 Edition 172