Narrative:
Creative and conscientious design strategies achieve 73% reduction in potable water consumption through low-volume flush and low-flow fixtures; no potable water is used for irrigation.
The on-site wastewater treatment plant, supplied by Zenon Environmental Inc., treats 100% of the graywater and blackwater to tertiary standards. For nine months of the year, the reclaimed water, estimated at 60,000 L/day, meets the entire building’s WC flushing and landscape irrigation needs. In the summer months, the reclaimed water is dedicated to the irrigation systems, with fresh water supplemented for WC flushing. During droughts, deferred scheduling ensures that all irrigation demands are met, either immediately or shortly thereafter. Lower summertime sewage flow rates are augmented by cruise ship sewage, which is otherwise trucked many miles to an Iona treatment plant.
Constructed on a remediated brownfield, the site's imperviousness is reduced by 29% from pre-development levels. The 28,000 m2 of landscaping and green roof filter and absorb stormwater runoff for 60% of the site area. Runoff is eliminated by conveying all non-absorbed stormwater directly to the ocean, without using municipal infrastructure. Runoff contaminants are eliminated at the source by using low-phosphorus-content fertilizers and outdoor cleaning agents, as specified in the Buildings O&M Manual.
Metrics:
Percent reduction of regulated potable water:
73%
Water Cycle
source: http://www.aiatopten.org