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BEAM P
LUS FOR
E
XISTING
B
UILDINGS
W
ATER
U
SE
(W
U
)
V
ERSION
1.2
W
U
6 E
FFLUENT
D
ISCHARGE TO
F
OUL
S
EWERS
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Page 102
5
W
ATER
U
SE
5.2
E
FFLUENT
W
U
6 E
FFLUENT
D
ISCHARGE TO
F
OUL
S
EWERS
E
XCLUSIONS
None.
O
BJECTIVE
Reduce the volumes of sewage discharged from buildings thereby
reducing burdens on municipal sewage supply and treatment facilities.
C
REDITS ATTAINABLE
1
P
REREQUISITES
Compliance with the Water Pollution Control Ordinance.
C
REDIT REQUIREMENT
1 credit for demonstrating a reduction in annual sewage volumes by 20%
or more, or reduction in sewage concentration by a 30% or more.
A
SSESSMENT
Where the Client can demonstrate that the target percentage of
reduction in annual sewage volume can be achieved, either based on the
default assumptions for the calculation procedure given in the Appendix
8.6 or any other appropriate estimation, the credit(s) shall be awarded.
B
ACKGROUND
With the application of modern technology in the design of water closet
flushing systems, the effectiveness of flushing can be maintained with a
reduced discharge. Similarly, the concentration of sewage in discharges
can be reduced at the building level to reduce the burden on sewage
treatment plants.