To encourage tenants to select buildings that employ best practices systems and green strategies.
Select a LEED certified building (5 points).
Locate the tenant space in a building that has in place 1 or more of the following characteristics at time of submittal (1 – 5 points). Each of the following options may also be met by satisfying the requirements of the corresponding LEED 2009 for New Construction credit.
Path 1. Brownfield Redevelopment (1 point)
A building developed on a site documented as contaminated by an ASTM E1903-97 Phase II Environmental Site Assessment or a local voluntary cleanup program. Projects outside the U.S. may use a local equivalent to ASTM E1903-97 Phase II Environmental Site Assessment.
A building on a site classified as a brownfield by a local, state, tribal or national government agency, whichever is most stringent.
Effective remediation of site contamination must have been completed.
Path 2. Stormwater design - quantity control (1 point)
A building that prior to its development had less than or equal to 50% imperviousness and has implemented a stormwater management plan that is equal to or is less than the predevelopment 1-1/2 year 24-hour rate and quantity discharge.
A building that prior to its development had more than 50% imperviousness and has implemented a stormwater management plan that reduced predevelopment 1-1/2 year 24-hour rate and quantity discharge by 25% of the annual on-site stormwater load. This mitigation can be achieved through a variety of measures such as perviousness of site, stormwater retention ponds, and harvesting of rainwater for reuse.
Stormwater values are based on actual local rainfall unless the actual exceeds the 10-year annual average local rainfall, in which case the 10-year annual average should be used.
Path 3. Stormwater design - quality control (1 point)
A building that has in place site stormwater treatment systems designed to remove at least 80% of the average annual site area’s total suspended solids (TSS) and 40% of the average annual site area’s total phosphorus (TP).
These values are based on the average annual loadings from all storms less than or equal to the 2-year, 24-hour storm. The building must implement and maintain best management practices (BMPs) outlined in Chapter 4, Part 2, Urban Runoff, of the EPA Guidance Specifying Management Measures for Sources of Nonpoint Pollution in Coastal Waters, January 1993 (EPA 840-B-92-002) or the local government’s BMP document, whichever is more stringent.
Path 4. Heat island effect - nonroof (1 point)
A building that provides shade (or will provide shade within 5 years of landscape installation), and/or uses light-colored or high-albedo materials with a solar reflectance index (SRI)1 of at least 29, and/or has open-grid pavement areas that individually or in total equal at least 30% of the site’s nonroof impervious surfaces, such as parking areas, walkways, plazas, and fire lanes.
A building that has placed a minimum of 50% of parking spaces underground or covered by structured parking.
A building that has an open-grid pavement system (less than 50% impervious) for 50% of the parking lot area.
Path 5. Heat island effect - roof (1 point)
A building whose roofing has a solar reflectance index (SRI) of the following minimum values for at least 75% of the roof surface:
|Low-sloped roof||≤ 2:12||78|
|Steep-sloped roof||> 2:12||29|
A building that has installed a vegetated roof for at least 50% of the roof area.
A building that has both high-SRI roofs and vegetated roofs that satisfy the following area requirement:
|Total Roof Area||≤||[||(||Area of SRI Roof||x||1.33||)||+||(||Area of Vegetated Roof||x||2||)||]|
Path 6. Light pollution reduction (1 point)
A building whose nonemergency interior luminaires with a direct line of sight to any openings in the envelope (translucent or transparent) must have their input power reduced (by automatic device) by at least 50% during nonbusiness hours. After-hours override may be provided by a manual or occupant-sensing device, provided the override lasts no more than 60 minutes.
A building whose openings in the envelope (translucent or transparent) with a direct line of sight to any nonemergency luminaires must have shielding (with transmittance of less than 10%) that is controlled or closed by automatic device during nonbusiness hours.
Path 7. Water-efficient landscaping - reduce by 50% (2 points)
A building that employs high-efficiency irrigation technology OR uses harvested rainwater or recycled site water to reduce potable water consumption for irrigation by
at least 50% over conventional means.
Path 8. Water efficient landscaping - no potable water use or no irrigation (2 points in addition to Path 7)
A building that uses only harvested rainwater or recycled site water to eliminate all potable water use for site irrigation (except for initial watering to establish plants), OR does not have permanent landscaping irrigation systems.
Path 9. Innovative Wastewater Technologies (2 points)
Path 10. Water use reduction - 30% reduction (1 point)
A building that meets the 30% reduction in water use requirement for the entire building and has an ongoing plan to require future occupants to comply.
Path 11. On-site Renewable Energy (1–2 points)
A building that supplies at least 2.5% (1 point) or 5% (2 points) of the building’s total energy use (expressed as a fraction of annual energy cost) from on-site renewable energy systems.
Path 12. Other Quantifiable Environmental Performance (1 point)
A building that has in place at the time of selection other quantifiable environmental benefits.
2 The solar reflectance index (SRI) is a measure of the constructed surface's ability to reflect solar heat, as shown by a small temperature rise. It is defined so that a standardblack surface (reflectance 0.05, emittance 0.90) is 0 and a standard white surface (reflectance 0.80, emittance 0.90) is 100. to calculate the SRI for a given material, obtain the reflectance value and emittance value for the material. SRI is calculated according to ASTM E 1980. Reflectance is measured according to ASTM E 903, ASTM E 1918, or ASTM C 1549. Emittance is measured according to ASTM E408 or ASTM C 1371.
3 For the purposes of this credit, under cover parking is defined as parking underground, under desk, under roof, or under a building.
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