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