Page 466 - The Engineering Guide to LEED-New Construction Sustainable Construction for Engineers

426 App endix B

Nonporous Sealant ‘A substance used as a sealant on nonporous materials. Nonporous
materials do not have openings in which fluids may be absorbed or discharged. Such
materials include, but are not limited to, plastic and metal.’
Nonpotable Water ‘Water that is not suitable for human consumption without treatment that
meets or exceeds EPA drinking water standards.’
Non-Regularly Occupied Spaces ‘Corridors, hallways, lobbies, break rooms, copy rooms,
storage rooms, kitchens, restrooms, stairwells, etc.’
Non-Roof Impervious Surfaces ‘All surfaces on the site with a perviousness of less than
50 percent, not including the roof of the building. Examples of typically impervious surfaces
include parking lots, roads, sidewalks, and plazas.’ This definition is inconsistent with the
typical definitions of impervious surfaces and the calculations in Chaps. 2 and 10. Typically
a surface with a perviousness of less than about 10 percent is considered to be an impervious
surface, and that is the assumption made in this text.

Non-Water-Using Urinal ‘A urinal that uses no water, but instead replaces the water flush
with a specially designed trap that contains a layer of buoyant liquid which floats above the
urine layer, blocking sewer gas and urine odors from the room.’ See Urinal, Non-Water-
Using.
Off-Gassing ‘The emission of volatile organic compounds from synthetic and natural
products.’

On-Site Wastewater Treatment ‘Use of localized treatment systems to transport, store, treat,
and dispose of wastewater volumes generated on the project site.’
Open-Grid Pavement ‘For LEED purposes, pavement that is less than 50 percent impervious
and contains vegetation in the open cells.’
Open-Space Area ‘Open Space Area is as defined by local zoning requirements. If local
zoning requirements do not clearly define open space, it is defined for the purposes of LEED
calculations as the property area minus the development footprint; and it must be vegetated
and pervious, with exceptions only as noted in the credit requirements section. For projects
located in urban areas that earn SS credit 2, open space also includes nonvehicular, pedestrian-
oriented hardscape spaces.’
Open-Grid Pavement ‘For LEED purposes, pavement that is less than 50 percent impervious
and contains vegetation in the open cells.’

Outdoor Lighting Zone Definitions ‘Definitions developed by IDA for the Model Lighting
Ordinance that provide a general description of the site environment/context and basic
lighting criteria.’ The IDA is the International Dark-Sky Association and can be found at
www.darksky.org.
Owner’s Project Requirements (OPRs) ‘Written document that details the functional require-
ments of a project and the expectations of how it will be used and operated; or an explanation
of the ideas, concepts, and criteria that are determined by the owner to be important to the
success of the project (previously called the design intent).’
Paints ‘Liquid, liquefiable or mastic compositions that are converted to a solid protective,
decorative, or functional adherent film after application as a thin layer. These coatings are
intended for on-site application to interior or exterior surfaces of residential, commercial,
institutional or industrial buildings.’