Sewage Treatment. Social: Livability, Good Urban Design Environment: ecology Economics: Increased marketability no views/save in remediation costs

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5 Social: Livability, Good Urban Design Environment: ecology Economics: Increased marketability no views/save in remediation costs

6 Social: Public art, connection to nature Environmental: stormwater treatment/ecology Economics: No pipes/water Savings for water feature Problem Potable Water use for Creeks/Ponds: Cisterns on bldg

7 Social: Designed for Public Viewing Environmental: sewage treatment Economics: Increased marketing/jobs Problem not enough rain water (dry summers):

8 Environmental: Less Potable Water Economics: Smaller plant, water savings Social: affordable housing Sizing of sewage treatment plant Potable Water Reduction in Buildings (56% from fixtures) Challenging Assumptions (location, water colour) Limit water for Irrigation because of Native plants

9 Environmental: Less Potable Water Economics: Smaller plant, water savings Social: affordable housing Without Water Conserving Fixtures Unit Price Volume Cost Costs to Owners $/623 Gallon G/yr $/yr Potable Water ,962,986 $271,766 Irrigation ,592 $3,487 Pond Refresh ,599,942 $25,637 Evap. Make-up in Ponds ,556 $1,537 Total 77,856,077 $302,426 With Water Conserving Fixtures Unit Price Volume Cost Costs to Owners $/623 Gallon G/yr $/yr Potable Water ,790,541 $119,604 56% Irrigation ,592 $3,487 Pond Refresh ,599,942 $25,637 Evap. Make-up in Ponds ,556 $1,537 Total 38,683,632 $150,264 Estimated Potable Water Savings from Dockside Fixtures 39,172,445 $152,163

10 Economics: Revenue Source Without Water Reuse Unit Price Volume Cost Costs to Owners $/623 Gallon G/yr $/yr Potable Water ,790,541 $119,604 Irrigation ,592 $3,487 Pond Refresh ,599,942 $25,637 Evap. Make-up in Ponds ,556 $1,537 Total 38,683,632 $150,264 With Water Reuse Unit Price Volume Cost Costs to Owners $/623 Gallon G/yr $/yr Potable Water Billed by Municipality ,056,474 $68,592 Potable Water Billed by Dockside Dockside Sewage Treatment ,056,474 $32,623 Re-use of Treated Water to Flush Toilets by Dockside Sewage Treatme ,734,067 $18,389 Irrigation - Use of treated Water by Dockside Sewage Treatment ,592 $3,487 Pond Refresh - Use of treated Water by Dockside Sewage Treatment ,599,942 $25,637 Evap. Make-up in Ponds - Use of treated Water by Dockside Sewage T ,556 $1,537 Total $150,264 Total Amount Billed By Dockside Sewage Treatment $81,672

11 Environment: Potable water savings Economics: Revenue Source, Tax payer Savings Total Water Saved from Treated Water Volume Costs to Owners G/yr Potable Water Savings from Fixtures 39,172,445 Re-use of Treated Water to Flush Toilets 4,734,067 Use of Treated Wastewater for Irrigation, Pond Refresh and Evap Makeup 7,893,091 Sub-Total 51,799,603 Surplus Water Available for Sale 18,160,129 Total 69,959,732 Approx. the entire Greater Victoria Area s water consumption in driest day of the year 66.5% reduction and 90% if surplus water can be reused Total Money Saved from Treated Water Unit Price Volume Cost Costs to Owners $/623 Gallon G/yr $/yr Potable Water Savings from Fixtures ,172,445 $152,163 Potable Water Billed by Dockside Dockside Sewage Treatment ,056,474 $32,623 Re-use of Treated Water to Flush Toilets by Dockside Sewage Treatme ,734,067 $18,389 Use of Treated Wastewater for Irrigation, Pond Refresh and Evap Make ,893,091 $30,660 Sub-Total $233,835 Surplus Water Available for Sale ,160,129 $70,542 Total $304,377 Anticipated Operating Costs $157,000 Potential Net Revenue with Surplus Sales $76,835 Potential Net Revenue without Surplus Sales $147,377

12 Environment: Potable water savings Economics: Revenue Source, Tax payer Savings Total Potable Water Savings equal to double the water savings achieved from 1999 to 2004 from the CRD rebate program for efficient toilet and washing machine replacement Based on CRD slow growth projections with no climate change considerations it is anticipated that the Leech River treatment (cost $100 million) could be delayed 23 years under high growth scenario assuming no climate change and commitment to spend $1.1 million annually in DSM programs. The NPV of this program is $24.32 million. Goal to save annually 2.5 billion gallons of water cost of program 1cent per gallon.

13 Environment: Potable water savings Economics: Revenue Source, Tax payer Savings Equivalent to 30 package Dockside Green treatment facilities which would treat 1.1 billion gallons of sewage and produce.9 billion of treated water. If combined with water efficient appliance strategy, total saving is 2.2 billion gallons for same cost as DSM. Operating costs covered by treated water revenues therefore essentially the capital cost of sewage treatment is free and avoid upgrading new water supply.

14 Evaluating Cost Cost measured as follows: Total Cost of system (treatment and distribution changes) plus Sewage operating costs divided by borrowing cost (5%) less. Energy generated from heat recovery/biogass divided by 5% less cost of energy equipment (Capitalization of revenues) less Treated water reuse * water/sewage charge dividend by borrowing cost (5%): Capitalization of Revenues Less Potential capital savings of deferral of new water expansion through use of treated water. Less Total water savings over 23 years times 1 cent per gallon (cost of existing DSM strategies.