855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 239

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Table 2 outlines the approved test methods for each contaminant. Teams can use laboratorybased testing or take measurements using direct-reading instruments. If using direct readings, all instruments must meet the minimum specifications of Table 2. Alternative laboratory-based methods may be used if the project team documents that the accuracy and resolution specifications in Table 2 are met.

Measure for a four-hour period, calculating peak concentration for carbon monoxide and average concentration for ozone, PM2.5, and PM10.

Option 3. Targeted One-time Individual Volatile Organic Compounds Testing

Targeted one-time VOC testing involves laboratory-based analysis to identify specific VOCs present in indoor air. This approach offers a more detailed understanding of indoor air quality by pinpointing particular VOCs, which is useful as a diagnostic tool when there are indications of air quality concerns, such as elevated TVOC levels detected in previous monitoring or testing (during Options 1 or 2), occupant complaints, or specific building materials that could emit high levels of VOCs.

Because VOC testing and analysis is complex, it must be performed using specific methods by a laboratory that is accredited under ISO/IEC 17025 for the test method used. When selecting a testing provider, the team should ask for these accreditation details.

A test for each individual VOC in Table 3 of the rating system must be performed at each measurement location.

Additionally, the laboratory will calculate the total, or TVOC. The TVOC calculation is intended to serve as a general indicator of the VOC levels in the building and is used to capture situations where there are higher levels of a different VOC than those targeted in Table 3 of the rating system.

If the TVOC concentration exceeds 500 ug/m3, the team must work with the laboratory to compare the individual VOC levels from the GC/MS results to associated cognizant healthbased limits. If any identified VOCs exceed cognizant health-based limits, the project must take corrective actions and retest to confirm the identified VOC level is reduced to below the cognizant health-based limit.

U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 229