volume 1 - Halifax Regional Municipality
volume 1 - Halifax Regional Municipality
volume 1 - Halifax Regional Municipality
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<strong>Halifax</strong> Water Integrated Resource Plan<br />
Appendices<br />
2.2.2 I/I Reduction Pilot Program<br />
An important part of <strong>Halifax</strong> Water’s long-term approach to reducing wastewater<br />
system demand is a comprehensive I/I program. The first step in that program is<br />
developing <strong>Halifax</strong> based information regarding the sources of I/I, possible measures to<br />
reduce I/I and the effectiveness and costs of these measures. This is the primary<br />
purpose of the I/I pilot program.<br />
Table 2.11 outlines the proposed program tasks and estimated duration. These tasks are<br />
intended to proceed in parallel to the extent possible.<br />
Table 2.11<br />
I/I Pilot Program Outline<br />
Baseline/Existing Study Review<br />
Task Description/Activities<br />
• Review recommendations from previous I/I related studies<br />
• Review existing CCTV inspection reports<br />
• Confirmation of recommendations that are still valid and required for<br />
implementation<br />
• Review existing flow monitoring and rain gauging locations (overall network)<br />
• Identify additional monitoring locations<br />
• Review hydraulic model and confirm pilot area is covered by skeletonized collection<br />
system model<br />
• Identification of data gaps<br />
Sewershed Prioritization/Data Collection and Model Development<br />
• Prioritization of prospective pilot program sewersheds (consideration of both public<br />
and private side flow reduction opportunities; focus on sewersheds expected to see<br />
WWTF expansions or significant PS upgrade requirements)<br />
• Select pilot program sewersheds<br />
• Build out model to serve pilot area(s) as needed<br />
• Identify flow monitoring location(s) for the pilot sewersheds and outline the flow<br />
monitoring program is to be undertaken<br />
• Assess need and feasibility of remote data access (using PI system) and impacts on<br />
timing for the pilot<br />
• Identify data coordination requirements with the hydraulic model<br />
• Install and calibrate flow meter(s)<br />
• Identify and assess range of I/I reduction techniques suitable for implementation in<br />
each pilot sewershed (storage, operational repairs (manhole, main line spot repairs),<br />
manhole cover plugs, sewer separation (combined systems), deep storm installation<br />
program (sanitary systems – no existing storm system), collection system relining<br />
program, lateral relining program, pressure grouting of manholes, flood grouting,<br />
sump pump disconnection program, foundation drain and roof leader disconnection<br />
program)<br />
• Identify capital projects that may be incorporated into the pilot evaluation process<br />
(i.e. pre-/post-construction monitoring of relevant capital projects)<br />
• Identify work plan, schedule, and measurement requirements for each sewershed<br />
Component<br />
Duration<br />
3 months<br />
36 -60 months<br />
Revision: 2012-10-29 Integrated Resource Plan –Appendices F-27<br />
October 31 2012 Page 206 of 272