volume 1 - Halifax Regional Municipality

Halifax Water Integrated Resource Plan
IRP Planning Context and Levels of Service
Beechville/Lakeside/Timberlea (BLT) WWTFs; liquid, undigested sludge is hauled to
Aerotech WWTF from the remaining facilities.
All sludge cake produced, either at the HHS facilities or Aerotech WWTF, is trucked to
the biosolids processing facility (BPF), located in the Aerotech Business Park, for alkaline
stabilization. In the past, the return of a recycle stream from the BPF had a negative
influence on the effluent quality discharged from the Aerotech WWTF. A pre-treatment
facility at the BPF has addressed this issue. The Aerotech WWTF still receives hauled
waste, which can upset plant processes and result in adverse effluent quality. Halifax
Water is presently reviewing its hauled waste management with a view to resolving this
issue.
Regional Wastewater Functional Plan
Halifax Water recently completed the Regional Wastewater Functional Plan (RWWFP) 18 .
The RWWFP presents a regionalized wastewater strategy that consolidates a number of
the smaller WWTFs now discharging into limited freshwater receivers and diverts them
to WWTFs discharging to more robust saltwater environments. The RWWFP addresses
the residential and employment growth that is presented in Section 4 under the growth
driver as well as the requirement to offset the increase in wet weather overflows that
results from future growth. This is also addressed in Section 4 under future wastewater
regulatory compliance.
The growth planning period for the RWWFP extends to 2046. This is somewhat beyond
the 2043 end of planning period used in the IRP. As it emerged, all the RWWFP project
expenditures are complete by the 2043 date. The RWWFP recommended plan includes
expansion of the Dartmouth, Herring Cove and Aerotech WWTFs as well as a number
storage and pumping facilities and trunk sewer upgrades and expansions. Reference
should be made to the RWWFP for plan details.
The preferred servicing solutions recommended by the RWWFP are briefly summarized
as follows:
Central Region
• Includes: Mill Cove, Springfield Lake, Fall River, Frame subdivision, Middle
Musquodoboit, Uplands Park, Wellington and Aerotech.
• In total, planned growth is 17, 800 persons of residential growth plus related
employment growth. Employment only, no residential growth for Aerotech.
• Only Mill Cove, Aerotech and Springfield Lake have planned serviced growth over
the RWWFP time horizon and are therefore the focus of the servicing strategy for
the central region.
18 Regional Wastewater Functional Plan, Halifax Water, June 2012
Revision: 2012-10-29 Integrated Resource Plan 22
October 31 2012 Page 55 of 272