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Capital Expenditure Summary Project Update
Joel MelansonDIVISION MANAGER, ENGINEERING & CONSTRUCTIONWATER SERVICESWater Committee, April 15, 202144307090
5.1
Water Committee
SECOND NARROWS WATER SUPPLY TUNNEL
2
North shaft looking south along the tunnel Back end of the tunnel boring machine
Water Committee
NEWTON PUMP STATION NO. 2
Architectural renderings Inside the pump station
Water Committee
KENNEDY NEWTON MAIN & ANNACIS MAIN NO. 5 SOUTH
4
Lowering pipe into trenchTrench ready for pipe installation
Water Committee
Phase 1CENTRAL PARK MAIN NO. 2
5
Installation of the 1.2 meter diameter pipe section
Water Committee
SOUTH DELTA MAIN
6
South Delta Main No. 1 tie-ins
Water Committee
SUNNYSIDE RESERVOIR
7
Corner of interior receiving water proofing membrane
Wet tapping into existing supply
Water Committee
8
Questions
Capilano Reservoir
Water Committee
2020 GVWD Water Quality Annual Report
Larry ChowProgram Manager, Interagency Projects and Quality Control
Water Committee April 15, 202144089915
Coquitlam Reservoir
5.2
Water Committee
PURPOSE
2
• Required under the BC Drinking Water Protection Regulation and Metro Vancouver’s Drinking Water Management Plan
• Documents the effectiveness of the multiple barriers used to protect water quality
• Provides water quality information to local governments and the public
Water Committee
SOURCE WATER QUALITY
3
• Turbidityo Capilano and Seymour Sources:
Delivered water <0.3 NTUo Coquitlam Source:
Greater than 1 NTU for 7 days, but never exceeded 5 NTU
• Chemical Compounds and Microbiological Parameterso Below GCDWQ
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
Turb
idit
y (N
TU)
Coquitlam
0
5
10
15
20
25
Capilano Seymour SCFP Finished
0
5
10
15
20
25
Turb
idit
y (N
TU)
Capilano Seymour SCFP Finished
Water Committee
SEYMOUR CAPILANO FILTRATION PLANT
4
Seymour Capilano Filtration Plant
• Met turbidity removal objectives under the GCDWQ
• Effective removal of organics and colour resulting in:o Less chlorine required for
secondary disinfectiono Lower levels of disinfection by-
products
Water Committee
FILTRATION REQUIREMENTS
5
Month Occurrence of IFE Turbidity Greater Than
1.0 NTU (None Allowed)
Percent of Time IFE Turbidity Less than 0.3
NTU Minimum 95% Allowed
January 0 99.99%
February 0 99.72%
March 0 99.94%
April 0 100%
May 0 100%
June 0 100%
July 0 100%
August 0 100%
September 0 99.99%
October 0 100%
November 0 100%
December 0 100%
• GCDWQ prescribes specific filtration requirements
• The turbidity leaving each individual filter (IFE) must:o Be less than 0.3 NTU
at least 95% of the time
o Never be greater than 1 NTU
Water Committee
COQUITLAM WATER TREATMENT PLANT
6
UV Units
• Ultraviolet light provides primary treatment for Giardia and Cryptosporidium
• Meets the requirements of the GVWD Operating Permit and GCDWQ for an unfiltered source
Coquitlam Water Treatment Plant
Water Committee
SYSTEM WATER QUALITY
7
Drinking Water Sample Analysis
GVWD Transmission System Water Mains and Reservoirs:• Approximately 7,500 samples collected and
99.6% were negative for coliform bacteria• No E. coli detectedLocal Government Distribution Systems:• Approximately 20,000 samples collected and
99.8% were negative for coliform bacteria • No E. coli detected
Water Committee
DISINFECTION BY-PRODUCTS
8
• Disinfection by-products (DBPs) are produced by disinfectants reacting with naturally-occurring organic compounds found in the source water.
• There are two main groups:o Trihalomethanes (THMs)o Haloacetic Acids (HAAs)
2020 Average MV TTHM = 22 µg/L2020 Average Municipal TTHM = 31 µg/L
2020 Average MV THAA = 24 µg/L2020 Average Municipal THAA = 30 µg/L
THMs
HAAs
Water Committee
CONCLUSIONS
9
• Both Water Treatment Plants servicing the GVWD region met requirements of:o Provincial GVWD Operating Permit o Federal Guidelines for Canadian Drinking
Water Quality • System wide, delivered water quality
was excellent in 2020
Water Committee
Questions?
Seymour Falls Dam
Water Committee
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