Pearl Building Rating System - Estidama

Calculations and
Methodology
� Updated OMP; and
� Photographic evidence confirming the installation of the stormwater management
strategies.
� For buildings within a Pearl Rated Community that has earned credit points under
both Quantity and Quality Control for PW-2 Stormwater Management, the community
wide stormwater system may be utilized to help earn this credit. In this case, plans
must be provided showing how the building and community stormwater strategies are
integrated. At least 50% of the difference between the post- and pre- development
peak runoff rate and quantity from the 2-year 24-hour design storm must be
contained and / or treated onsite (consistent with quantity and / or quality credit
points pursued). The remainder must be sent to the community stormwater system.
� Non-structural stormwater management solutions include sustainable urban drainage
systems (SUDS) such as ponds, vegetated swales, wetlands, etc.
� Structural stormwater management solutions include engineered structures such as
tanks, pipes, concrete channels, etc.
� All water infiltrated through SUDS is considered to be 100% treated, achieving all the
required quality control standards.
� Calculations must be signed off by a qualified civil engineer.
A qualified Civil Engineer is an individual with:
� A degree in a relevant subject, and
� A minimum of five years relevant work experience and a proven track record on
working on similar projects in the region.
References � Environment Agency Abu Dhabi, www.ead.gov.ae
� CSIRO Urban Stormwater Best Practice Environmental Management Guidelines
(2006)
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