Most LEED points come from efficiency in design and construction areas such as energy, water, materials, and indoor environmental quality. That’s why it may not be obvious how geotechnical engineers and environmental scientists contribute to LEED certification. Since LEED Silver is a requirement for most new public buildings, with LEED Gold the new normal, owners need every possible point. Here are several avenues to gain more:
Sustainable Sites – Several credits are available, including Brownfield Redevelopment (Credit 3); Protect and Restore Habitat, including green roofs (Credit 5.1); and Stormwater Design, including infiltration, reuse, pervious paving, swales, and other LID solutions (Credits 6.1 and 6.2).
Water Efficiency – Credits are typically based on the percentage of reduction in the use of potable water for the new development. Water-efficient landscaping, reuse of rainwater, and capture and reuse of groundwater in the irrigation or building systems can cut water use by 20% or more. Designing efficient filters for graywater recycling can lead to additional points.
Energy and Atmosphere – Credit 2 (On-Site Renewable Energy) allows as many as 3 credits for generating up to 7.5% of the building’s power usage on site. Properly designed ground source heat pump geothermal systems will achieve this goal and these points.
Materials and Resources – Again, several credits are available: Credit 2.1 Construction Waste Management (diverting demolition debris from landfills or incinerators), Credit 3.2 Materials Reuse (reusing salvaged building materials like foundation piles), Credit 4 Recycled Content (using materials such as ground down tires or recycled glass for backfill).
Innovation & Design Process – New or innovative energy saving solutions that have been applied to a site development can be described, justified, and submitted for potential extra points.
Geotechnical and environmental professionals can work with design and construction teams to gain as many as 5 or 6 additional points – and that might be the difference between Silver and Gold, or Gold and Platinum.