Edmonton Waterworks 2017
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EDMONTON WATERWORKS ANNUAL REPORT TO ALBERTA ENVIRONMENT AND WATER Approval Number 638-03-00 2017 2017 ANNUAL REPORT TABLE OF CONTENTS PAGE 1.0 Overview 1.1 Overview .................................................................................................................. 1 1.2 Process Schematic – Rossdale (Plants 1 & 2) ......................................................... 5 1.3 Process Schematic – E. L. Smith (Plant 4) .............................................................. 6 1.4 Summary of Violations and Major Incidents ............................................................. 7 1.5 Alberta Environmental Operator Certifications ....................................................... 10 1.6 Demand Production Statistics (Estimated highlift flow) .......................................... 16 1.7 Energy Consumption and Usage ........................................................................... 17 2.0 Raw Pumpage, Treated Pumpage and Distribution System 2.1 Storage Capacities of Reservoirs .......................................................................... 18 2.2 Reservoir Pressure Operating Ranges .................................................................. 19 2.3 Fire Hall and other City Pressure Limits ................................................................. 20 2.4 Regional Customers .............................................................................................. 21 2.5 Pumping Facilities within the City of Edmonton Distribution System ..................... 22 2.6 Production Summary ............................................................................................. 24 2.7 Raw Water Intake (ML) .......................................................................................... 25 2.8 Treated Water Production (ML) ............................................................................. 26 3.0 Water Quality 3.1 Raw Water Quality – North Saskatchewan River ................................................... 27 3.2 Treated Water Quality Entering the Distribution System ........................................ 28 3.3 Rossdale Filters 1 - 9 Particle Counts (no./mL,>2um) ........................................... 29 3.4 E.L. Smith Filters 1 - 9 Particle Counts (no./mL,>2um) .......................................... 30 3.5 E.L. Smith Filters 10 -18 Particle Counts (no./mL,>2um) ....................................... 31 3.6 Rossdale Filters 1 – 9 Turbidity (NTU) ................................................................... 32 3.7 E.L. Smith Filters 1 – 9 Turbidity (NTU) ................................................................. 33 3.8 E.L. Smith Filters 10 – 18 Turbidity (NTU) ............................................................. 34 3.9 Combined Filter Effluent Water Quality .................................................................. 35 3.10 Rossdale UV Disinfection – Filters 1 - 3 ................................................................. 36 3.11 Rossdale UV Disinfection – Filters 4 - 6 ................................................................. 37 3.12 Rossdale UV Disinfection – Filters 7 - 9 ................................................................ 38 3.13 E. L. Smith UV Disinfection – UV Reactors 1 - 4 ................................................... 39 3.14 Log Removal .......................................................................................................... 40 4.0 Chemicals 4.1 Liquid Alum Chemical Consumption ...................................................................... 41 4.2 Primary Polymer (Magnafloc LT 27AG) Chemical Consumption ........................... 42 4.3 Carbon Chemical Consumption ............................................................................. 43 4.4 Chlorine and Sodium Hypochlorite Chemical Consumption ................................... 44 4.5 Filter Polymer (Magnafloc LT 7996) Chemical Consumption ................................. 45 4.6 Aqua Ammonia Chemical Consumption ................................................................ 46 4.7 Caustic Soda Chemical Consumption .................................................................... 47 4.8 Fluoride Chemical Consumption ............................................................................ 48 4.9 Sodium Bisulfite Chemical Consumption ............................................................... 49 5.0 Waste Streams 5.1 Waste Stream Volumes (ML) ................................................................................. 50 5.2 Rossdale Clarifier Blowdown, Clarifier Washdown and Backwash Water Waste Stream Data ........................................................................................................ 51 5.3 Rossdale Waste Stream Data ................................................................................ 52 5.4 E.L. Smith Clarifier Blowdown, Clarifier Washdown and Backwash Water Waste Stream Data ........................................................................................................... 53 5.5 E.L. Smith Waste Stream Data .............................................................................. 54 6.0 Reservoir Chlorine Residual Part 1 .............................................................. 55 6.1 Reservoir Chlorine Residual Part 2 ......................................................................... 56 7.0 Quality Assurance 7.1 Water Quality Objectives ...................................................................................... 57 7.2 Summary of Major Chemicals, Microbiological and Physical Parameters ............ 58 7.3 Summary of Laboratory Analysis .......................................................................... 59 7.4 Bacteriological Data: Water Treatment Plants ...................................................... 60 7.5 Bacteriological Data: Distribution System ............................................................. 61 7.6 Giardia and Cryptosporidium ................................................................................ 65 7.7 Treated Water Entering the Distribution System .................................................. 68 7.8 Rossdale and E.L. Smith combined Filter Effluent Water Analysis ....................... 76 7.9 Routine Distribution System ................................................................................. 78 7.10 Castledowns, Clareview and Kaskitayo Reservoir................................................ 82 7.11 Londonderry, Millwoods, and North Jasper Place Reservoir ................................ 86 7.12 Ormsby, Papaschase 1 and Papaschase 2 Reservoir ......................................... 90 7.13 Rosslyn 1, Rosslyn 2 and Thorncliff Reservoir ..................................................... 94 7.14 Routine Distribution System, Field Reservoirs, Fire Stations and Staff Residences ......................................................................................... 98 7.15 Raw River Water ................................................................................................ 101 7.16 Statistics on Water Quality Complaint Samples ................................................. 112 7.17 Method Detection Limits ..................................................................................... 113 7.18 Explanation of Notations Used ........................................................................... 122 1.1 Overview Through 2017, EPCOR Water Services Inc. (EWSI) continued to satisfy all water demand requirements while meeting our strict water quality criteria. Despite continued growth of the service population, total demand in 2017 fell as compared to 2016 and 2015. This could be a result of cooler, wetter summer conditions but also decreasing demands from the industrial and commercial segments, perhaps indicating an impact of the economy. Overall residential per capita and total per capita values also continued to trend downward primarily due to the installation of water efficient fixtures and appliances. Rossdale and E.L. Smith WTPs were converted from Direct Filtration (DF) to conventional treatment on February 18th as very mild temperatures resulted in the upstream creeks starting to flow. Some odours were detected and carbon was turned on for 8 days. As the temperatures decreased towards the end of February, Rossdale was able to be converted back into direct filtration mode on March 10 until March 21, where warm temperatures again brought spring runoff conditions. Though colour peaked at 83 TCU, spring runoff did not bring any significant taste and odour concerns and carbon was finally turned off on April 7. There were two rainfall/mountain runoff events near the end of May and mid- June, which resulted in peak turbidities of approximately 550 and 1300 NTU, respectively. These events were handled well with no production problems encountered. There were no other significant rainfall events affecting water quality the rest of the year. While raw water quality was reasonably stable, there were a couple of significant infrastructure failures that impacted production at E.L. Smith. In late 2016 and again in the fall of 2017, leaks were discovered on one of the two pipelines which convey raw water from the low lift pumphouse to the WTP. While each leak was ultimately repaired, production was impacted due to the requirement to shut down the pumphouse feeding the line. The fish return pumps in one of the lowlift pumphouses at E.L. Smith WTP also failed without warning and had to be repaired offsite. Edmonton