Coquitlam UV Disinfection Project
WATER TREATMENT PLANT CONSTRUCTION
METRO VANCOUVER, working in cooperation with the City of Coquitlam, has undertaken a major water utility infrastructure project at the Coquitlam watershed to ensure the region will continue to have high-quality drinking water. The existing Coquitlam water treatment facilities have been upgraded and an ultraviolet (UV) light disinfection facility has been added in order to comply with new requirements under Health Canada’s Guidelines for Canadian Drinking Water Quality. Construction of the Coquitlam UV Disinfection Facility commenced in spring 2011. This facility has been treating Coquitlam source water since early 2014.
BACKGROUND Metro Vancouver supplies drinking water for our region. The source is rainwater and snowmelt, which is stored in the Capilano, Seymour and Coquitlam reservoirs. In order to protect water quality, these mountainous watersheds are closed to public access.
The Coquitlam Watershed and its water treatment facil- ities provide approximately 370 million litres of potable water on an average day, or approximately one third of the total water supply delivered in the Metro Vancouver region.
As part of Metro Vancouver’s Drinking Water Treatment Program, the water disinfection process was upgraded in 2000 to include ozonation as the primary disinfectant, in addition to the existing chlorination system. The Coquitlam UV Disinfection Facility complements the existing ozone and chlorination processes by improving primary disinfection. 1 1 900 800 150 200 1 1 14 00 00 0 0 130 120 0 0 900 0 1700 0 130 160 150 100 0 120 140 140 0 0 0 0 150 0 0 0 0 0 0 130 700 130 120 100 50
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00 1 4 0 0 7 300 1100 300 6 6 600 7 BENEFITS OF ULTRAVIOLET LIGHT ULTRAVIOLET, OZONE AND 8
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0 0 CHLORINATION DISINFECTION2 120 800 500 treatment for decades. However, there are chlorine- 300 500 12
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200 resistant organisms, such as Cryptosporidium and Giardia, PROCESSES 300
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0 2 5 1 1100 which are harmful to humans. Water from the Coquitlam 6Reservoir is pre-treated by the 600 700 6 0 existing ozonation system before it enters the Coquitlam 11 100 400 700 200 Ultraviolet light is highly effective at treating these 00UV Disinfection Facility. Ozone, a form of oxygen, helps 120 600 11 4 Bennie Lake McCombe Lake 0 0 chlorine-resistant micro-organisms and produces no remove micro-organisms from the water, improves water 0 100 4 10 100 120 5 disinfection by products. quality and reduces disinfection by-products. Ozone 8 1 0 9 9 0 500 400 1 also helps to improve water clarity, which increases the 0 1 900 100
00 UV light, which is invisible to the human eye, provides efficiency of the subsequent ultraviolet process.3 300 The result 120 800 rapid, effective inactivation of micro organisms through a is less energy use and a smaller sized UV plant. 900 200
4 400 physical process. 400
The water is directed into eight ultraviolet units, each2 Ultraviolet light also has the benefit of not altering the containing 40 ultraviolet lamps encased3 in protective Buntzen L. 2 Legend taste, colour or odour of water. sleeves. As water flows through the units, ultraviolet2 Dennett Lake 100 100 600 0
light0 emitted from the lamps passes through the water, 700
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1 1 km Road Marker 500 inactivating the micro organisms. As a result, drinking 1 Munro Lake 400 water will be safer without additional chemicals being
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200 added at the treatment plant. Lastly, chlorine is added Watershed Road 900 as a disinfectant to safeguard the water from bacterial
800 regrowth in the water distribution system. WatercPoitut Rr.se Cypress Lake 500
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100 300 Kilomet200 ers 400 Scott Cr. 400 Coquitlam R. 200 200 100 g:\projects\ws01\00\coquitlamwatershed.mxd GC May 2014 200 300 300 100 1 1 900 800 150 200 1 1 14 00 00 0 0 130 120 0 0 900 0 1700 0 130 160 150 100 0 120 140 140 0 0 0 0 150 0 0 0 0 0 0 130 700 130 120 100 500
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0 0 6 0 1 Don LakeYoung Lake 100 1300 1200 1000 00 0 900 13 140 Joseph Lake 900 Little Anne Lake Anne Lake Disappointment Lake 0 12 60 800 0 0 900
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0 0 140 70 0 100 140 500 120 0 800 0 0 160 1700 0 700 1200 140 90900 0 Norton Lake 130 0 150
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0 180 100 27 1700 0 26 00 11 17 0 0 0 130 500 500 27 0 170 0 26 140 900 130 25 0 130 160 0 200 0 170 0 0 0 400 0 170 150 0 140 1 120 1 0 10 00 600 Consolation Lakes 160 1 150 400 0
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00 1 4 0 0 7 300 1100 300 6 6 600 7 8 CONSTRUCTION OVERVIEW ENVIRONMENTAL STEWARDSHIP 500 0 6 700 7 0
120 The Coquitlam UV Disinfection Project includes: Environmental stewardship is a critical part of Metro
0 0 2 120 800 500 300 500 • a new ultraviolet disinfection facility12 Vancouver’s mandate. Careful design and construction
400
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200 • associated underground valve chambers, which planning minimized environmental impacts. 300
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0 2 5 1 1100 6 600 regulate the flow of water through surrounding Working in conjunction with a number of approval 700 6 0 water mains 11 100 agencies including Fisheries and Oceans Canada (DFO), 400 700 200
00 • an operations and maintenance centre, which houses120 enhanced salmon rearing habitat was constructed at the 600 11 4 Bennie Lake McCombe Lake 0 0 a control room, offices, meeting rooms and a water-0 10end0 of the project. In addition, an environmental impact 4 10 100 120 5 8 testing laboratory assessment was conducted. Recommendations that were1 0 9 9 0 500 400
1
• upgrades to the existing ozonation facility. 0 1 implemented900 include preconstruction wildlife surveys 100
00 3 300 Construction activities for the new facility were1 20confined and the salvage and relocation of small animals and fish. 800 within the Coquitlam Watershed, with900 minimal impact to Tree removal has been minimized by utilizing existing 200
4 400 400 nearby residents. Activities associated with the project cleared areas within the watershed. Top soil, woody debris 2 include: and portions of the excavation soils were reused on-site 3 • tree removal whenever possible and all construction areas were restored Buntzen L. 2 Legend 2 • excavation and soil relocation Dennett Lake at the end of the project. 100 100 600 0
0 • equipment and material delivery 700
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1 1 km Road Marker 500 • building construction and pipe1 installation Munro Lake 400 • restoration and habitat enhancement.
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200 Watershed Road 900
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100 300 Kilomet200 ers 400 Scott Cr. 400 Coquitlam R. 200 200 100 g:\projects\ws01\00\coquitlamwatershed.mxd GC May 2014 200 300 300 100 SUSTAINABLE BUILDING DESIGN METRO VANCOUVER’S ROLE The Coquitlam UV Disinfection Facility was designed IN WATER SUPPLY with numerous sustainable features and is targeting a Metro Vancouver provides a reliable source of safe, high- Leadership in Energy and Environmental Design (LEED) quality drinking water to its customers at a reasonable cost. Silver classification. This includes acquiring and maintaining supply, as well as
treating, testing and delivering water to the municipalities. Some of the sustainable features include green roofs, In turn, the municipalities are responsible for conveying enhanced salmon habitat creation, incorporating water to residents and businesses. indigenous plants in the landscaping and using permeable pavement to mimic the water retention of natural soil. Metro Vancouver uses a system of watersheds, dams,
treatment facilities, reservoirs, pump stations and Additional sustainable features include a hydronic heating water mains. To maintain the quality and reliability of system which utilizes water to heat or cool the building these systems and of the supply, improvements are as opposed to conventional heating, EcoSmart concrete constantly underway. which reduces carbon dioxide (CO2) emissions, installation of electrical vehicle charging stations and the use of recycled building materials. In addition, the selected ultraviolet technology will reduce energy consumption by approximately 30 per cent relative to conventional systems.
CONTACT INFORMATION Metro Vancouver Information Centre: 604-432-6200 (M to F from 8 am to 4:30 pm) Email: [email protected] Fax: 604-432-6297 Information Centre, Metro Vancouver, 4330 Kingsway, Burnaby, BC V5H 4G8