Greater Vernon Water Annual Report 2018

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Greater Vernon Water Annual Report 2018 Greater Vernon Water Annual Report 2018 2014 2018 Greater Vernon201 Water Annual Report Prepared for: Interior Health and RDNO Prepared by: Renee Clark, Manager, Water Quality Contributors: RDNO Utilities Department Regional District of North Okanagan 9848 Aberdeen Road, Coldstream, BC September 10, 2019 Table of Contents INTRODUCTION ....................................................................................................................... 1 BACKGROUND ......................................................................................................................... 1 WATER SYSTEM OVERVIEW .................................................................................................. 2 Sources and Treatment .......................................................................................................... 2 Separated Non-Potable Water Sources ................................................................................. 5 Distribution System ................................................................................................................ 6 System Control – Supervisory Control and Data Acquisition (SCADA) Software ................... 7 Pressure-Reducing Valve Stations (PRV) .............................................................................. 7 WATER SYSTEM VALUE .......................................................................................................... 8 Asset Management Investment Plan ...................................................................................... 9 CAPITAL WORKS PROJECTS .................................................................................................. 9 Water Supply and Distribution System Upgrading .................................................................. 9 WATER MAINS .........................................................................................................................10 Water Main Breaks ................................................................................................................10 New Water Mains ..................................................................................................................10 STAFFING ................................................................................................................................10 RDNO Engineering Staff Overview .......................................................................................11 Operators Overview ..............................................................................................................11 SOURCE ASSESSMENTS AND SOURCE RESPONSE PLANS .............................................13 Duteau Creek ........................................................................................................................13 Kalamalka Lake.....................................................................................................................16 MONITORING PROGRAM .......................................................................................................19 Source and Treatment Testing Parameters ...........................................................................21 Turbidity ................................................................................................................................21 Chemical Analysis ................................................................................................................22 Treatment Testing Parameters ..............................................................................................22 Distribution Testing Program .................................................................................................23 Bacterial Test Results ...........................................................................................................25 EMERGENCY RESPONSE / NOTIFICATION/ COMMUNICATIONS .......................................27 Water Quality Notification and Communication .....................................................................27 CUSTOMER CALLS AND RESPONSE ....................................................................................29 CROSS CONNECTION CONTROL PROGRAM .......................................................................29 i WATER CONSUMPTION .........................................................................................................30 WATER SUSTAINABILITY AND DEMAND MANAGEMENT ....................................................33 Conservation-Oriented Water Rates ......................................................................................33 Water Efficiency Education Programs - Agricultural Program ................................................34 Water Efficiency Education Programs - Urban Program ........................................................35 Drought Management ...........................................................................................................36 LONG TERM IMPROVEMENTS ...............................................................................................37 CONCLUSION ..........................................................................................................................37 REFERENCES .........................................................................................................................39 APPENDIX 1 .............................................................................................................................42 SOURCE (RAW) WATER COMPREHENSIVE ANALYSIS ...................................................42 Kalamalka Lake Raw Water Summary ..................................................................................43 Physical - Chemical (Table 18, 19, 20) .................................................................................43 Volatile Organic Compounds (VOCs) ...................................................................................46 Turbidity ................................................................................................................................46 Biological – Microbiology - Bacteria in Source Water ............................................................48 Total Organic Carbon (TOC) .................................................................................................50 Nutrients ...............................................................................................................................51 Duteau Creek Raw Water Summary .....................................................................................53 Physical – Chemical .............................................................................................................53 Bacteria in Source Water ......................................................................................................59 Total Organic Carbon (TOC) and Dissolved Organic Carbon (DOC) ....................................60 APPENDIX 2 .............................................................................................................................62 WATER TREATMENT ..........................................................................................................62 Turbidity Statistics .................................................................................................................63 Turbidity and Treatment Targets ...........................................................................................63 Mission Hill Water Treatment Plant (UV Disinfection) ............................................................63 Ultra Violet Transmittance (UVT) ..........................................................................................63 MHWTP Monthly Averages ...................................................................................................65 Duteau Creek Water Treatment Plant ...................................................................................65 Aluminum .............................................................................................................................65 Total and Dissolved Organic Carbon ....................................................................................66 APPENDIX 3 .............................................................................................................................70 TREATED WATER DISTRIBUTION SYSTEM ......................................................................70 GVW Water Distribution Summary ........................................................................................71 Physical – Chemical .............................................................................................................71 ii Kalamalka Distribution System 2018 Averages .....................................................................73 Duteau Creek Water Treatment Plant / Duteau Distribution System .....................................74 Physical – Chemical .............................................................................................................74 Duteau Distribution System 2018 Averages ..........................................................................77 Chlorine - By Products in Distribution Water .........................................................................78 Duteau Distribution System TTHM ........................................................................................78 Kalamalka Distribution System THM .....................................................................................81
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