When working on a renovation project, asbestos containing materials have been found on the perimeter walls. When calculating the percentage of building being reused under the Materials and Resources Credit, Building Life-Cycle Impact Reduction, the materials remediated will be

When working on a renovation project, asbestos containing materials have been found on the perimeter walls. When calculating the percentage of building being reused under the Materials and Resources Credit, Building Life-Cycle Impact Reduction, the materials remediated will be
A . included in the calculation
B . excluded from the calculation
C . excluded if the total volume is less than 25% of the building being reused
D . excluded if the total volume is more than 25% of the building being reused

Answer: B

Explanation:

The Materials and Resources Credit, Building Life-Cycle Impact Reduction, rewards projects that reuse existing building structures and envelopes, or salvage materials from off-site or on-site sources. According to the LEED v4 Reference Guide for Building Design and Construction, the project team must calculate the percentage of building being reused by dividing the area of the existing building structure and envelope that is reused by the total area of the completed building structure and envelope1. However, the project team must exclude from the calculation any hazardous materials that are remediated as a part of the project, such as asbestos, lead, mold, or PCBs1. Therefore, the asbestos containing materials found on the perimeter walls will be excluded from the calculation, regardless of the volume.

References:

• LEED v4 Reference Guide for Building Design and Construction, Materials and Resources Credit: Building

Life-Cycle Impact Reduction, page 5451

• Building life-cycle impact reduction | U.S. Green Building Council2