Windsor Utilities Commission Water Treatment Plant 2013 Annual Compliance Report

Transcription

1 Windsor Utilities Commission Water Treatment Plant 2013 Annual Compliance Report Windsor Utilities Commission 3665 Wyandotte Street East Windsor, ON N9A 5T7

2 2013 Annual Compliance Report Table of Contents Introduction Page 3 Schedule 1. Treatment Equipment Page 4 Schedule 6. Operational Checks, Sampling and Testing General Page 5 Schedule 7. Operational Checks Page 5 Schedule 10. Microbiological Sampling and Testing Page 6 Schedule 13. Chemical Sampling and Testing Page 7 Schedule 15.1 Lead Page 8 Schedule 16. Reporting Adverse Test Results and Other Problems Page 8 Schedule 17. Corrective Action Page 9 Schedule 22. Summary Reports for Municipalities Page 9 Capital Renewal Program Page 10 Appendix A Operational Charts Page 15 Appendix B 2013 O. Reg 170/03 Annual Report Page 26 2

3 Introduction In 2013 Windsor Utilities Commission produced 45,354,550 million litres of potable water for use by the citizens of the City of Windsor, the Town of LaSalle as well as the Town of Tecumseh. The attached summary (Table 1) provides a detailed breakdown of the monthly production rates, the average day, peak day and peak hour for each of the months. The volume of water transferred to the Town of LaSalle and the Town of Tecumseh is also provided. The following chart indicates the percentage of water delivered to each served Municipality. Under Ontario Reg. 170/03 there are a number of Schedules that outline the requirements for compliance with the Safe Drinking Water Act (SDWA). In this report we have highlighted the requirements of the applicable section of the regulation along with a statement of compliance or, if applicable, specific areas of non-compliance with the schedule requirements. 3

4 Schedule 1. Treatment Equipment Schedule 1 dictates that the owner of a drinking water system shall ensure that approved water treatment equipment, as specified in the facility Licence or Certificate of Approval, is provided and is in operation whenever water is being supplied for potable use. Further, the regulation requires that the equipment is being operated in a manner that achieves its design capabilities and that only certified operators are carrying out operation of the system. Below is a schematic of the overall treatment train for the A.H. Weeks treatment facility. In the calendar year 2013, this section of the regulations was fully complied with. 4

5 Schedule 6. Operational Checks, Sampling and Testing General This schedule outlines the frequency of sampling and equipment checks, the requirement for chlorine residual testing to be carried out at the time microbiological samples are collected, the location at which samples are to be collected, the form of sampling to be undertaken as well as outlining the requirements for continuous monitoring equipment. The schedule also provides clarification on how samples are to be handled and recorded, as well as dictating the need for an appropriately accredited laboratory to carry out the sample analysis. In the calendar year 2013, this section of the regulation was fully complied with. Schedule 7. Operational Checks This schedule specifies the requirements for continuous monitoring equipment for free chlorine residual, turbidity and fluoride and the required location for this equipment. The regulation dictates the requirement for regular collection and analysis of samples by an appropriately certified individual. The Chart below summarizes the results for the above mentioned parameters. Note Fluoride addition ceased on March 25, In the calendar year 2013, this section of the regulation was fully complied with. 5

6 Schedule 10. Microbiological Sampling and Testing This schedule provides the requirements for sampling and testing of microbiological parameters. The schedule states that for Large Municipal Systems serving a population over 100,000 people, the required monthly frequency of sampling is 100 distribution samples plus one additional sample for every 10,000 people served, with at least three samples being taken in each week. Each of these samples are to be tested for Escherichia coli and total coliform, with at least 25% of the samples required to be tested for general bacteria population expressed as colony counts on a heterotrophic plate count. In Windsor s case, the required sampling frequency is 123 samples monthly. In 2013, 2323 samples were collected and analysed, an average of 194 samples per month. Approximately 72% of the distribution samples were also analysed for heterotrophic plate count. In addition, each of these samples was tested for free chlorine residual at the time the sample was taken. Schedule 10 states that a treated water sample must be taken at least once per week and tested for Escherichia coli, total coliform, and general bacteria population expressed as colony counts on a heterotrophic plate count. In Windsor s case, treated water samples are collected more or less on a daily basis and were tested by an accredited 3 rd party laboratory. The schedule further states that a raw water sample must be taken at least once per week before any treatment is applied to the water and that the sample be tested for Escherichia Coli and total coliform. In Windsor s case, samples were collected and tested on average five days per week. The following Chart indicates the number of samples taken on a monthly basis. 6

7 Schedule 13. Chemical Sampling and Testing This schedule provides the requirements for sample collection and testing for a variety of chemical components in drinking water. The requirements are outlined below along with the status of Windsor s sampling program. Inorganics One sample must be collected and tested every 12 months if the source is surface water and tested for every parameter set out in Schedule 23 (see attached). In 2013 Windsor collected samples and tested for every parameter set out in Schedule 23 on a quarterly basis. Lead One sample must be collected and tested every 12 months for Lead. Windsor collected samples and tested for lead in a treated water sample and a distribution sample on a quarterly basis. Organics One sample must be collected and tested every 12 months if the source is surface water and tested for every parameter set out in Schedule 24 (see attached). During 2013 Windsor Utilities Commission collected samples and tested for every parameter set out in Schedule 24 on a quarterly basis. Trihalomethane (THM s) For any system that provides chlorination, one distribution sample will be collected and tested for trihalomethanes every 3 months. Windsor Utilities Commission collected samples and tested for trihalomethanes on a quarterly basis. Nitrates and Nitrites The owner of a drinking-water system and the operating authority for the system shall ensure that at least one water sample is taken every three months and tested for nitrate and nitrite. In 2013 Windsor Utilities Commission collected samples and tested for nitrates and nitrites on a quarterly basis. 7

8 Sodium The schedule stipulates that at least one water sample is taken every 60 months and tested for sodium. Windsor Utilities Commission last collected and sampled for sodium in October of Schedule 15.1 Lead This schedule provides the requirements for sampling and testing of Lead. The schedule states that for Large Municipal Systems serving a population over 100,000 people, two sets of samples must be taken. One set of samples shall be taken from December 15, 2012 April 15, 2013 and the second set from June 15, 2013 October 15, The minimum number of samples to be collected for a population of 100,000 or more is 130 per sample set. These samples include private, non-private and distribution. Each of these samples are to be tested for Lead. In 2013, 291 samples were collected and analysed, 148 for the first round and 143 for the second round. Of the samples tested 37 samples exceeded the 10 mg/l reporting requirement. In the Calendar year 2013 the requirements of Schedule 15.1 were fully complied with. Schedule 16. Reporting Adverse Test Results and Other Problems If a sample collected and tested indicates an adverse result as outlined in the regulations, the owner of a drinking water system must report the result to the Medical Officer of Health (MOH) and the Spills Action Centre of the MOE. If an observation, other than an adverse test results indicates that a drinking water system is directing water that may not be adequately disinfected to users of the water system, the observation must be reported to the Medical Officer of Health and the Spills Action Centre of the MOE. If a report is required under this section, an immediate report must be provided to the MOH by speaking directly to a person at the Windsor Essex County Health Unit (WECHU) or the designated on call representative. In addition, an immediate report must be provided to the Ministry of the Environment by contacting the Ministry s Spills Action Centre. These verbal reports of adverse water conditions must be verified by written notice within 24 hours to the Medical Officer of Health and the Ministry of the Environment specifying the nature of the adverse result, actions being taken or observation and what corrective action is being taken. Within seven days of resolution of a problem, a follow up written notice is to be provided outlining the resolution that gave rise to the adverse result report. In 2013, there were 7 adverse incidents requiring notification of the Medical Officer of Health and the Ministry of Environment. Of these, 2 resulted from free chlorine being less than 0.05 mg/l within the distribution system, 1 resulted from a lead exceedance and 4 resulted from bromate exceedances. 8

9 In all situations where it was determined that there was an adverse result, notification was made to the local Medical Officer of Health and the MOE. Schedule 17. Corrective Action This schedule outlines required corrective action to be followed with the determination of an adverse result requiring notification. In all cases, the required corrective action was followed as directed by the Medical Officer of Health. Schedule 22. Summary Reports for Municipalities Not later than March 31 of each year, a summary report must be prepared for the preceding calendar year and submitted to members of municipal council and members of a municipal services board if one exists. The submission of this report fulfils the requirement for this section of the regulations. Tables summarizing 2013 treated water volume (Table 1), 2013 volume as a percentage of approved plant capacity (Table 2), 2013 microbiological sample counts (Table 3), 2013 distribution chlorine residuals (Table 4) and 2013 operational parameters (Table 5) are attached hereto for review. A copy of schedule 23 (inorganic test parameters) and schedule 24 (organic test parameters) are attached for information, along with the 2013 Annual Report as previously submitted and as required by the regulation. 9

10 Capital Renewal Program Several capital projects were undertaken in 2013 including the Water Meter Replacement Program, Watermain Replacement Program, Bulk Water Fill Station, Hanna Tower Rehabilitation and Phase two of Model Predictive Pressure Control. Brief descriptions of each project are noted below. Water Meter Replacement Program The goal of WUC's ongoing Water Meter Replacement Program is to replace all damaged, frozen, defective, aging and obsolete water meters, both in residential and industrial, commercial and institutional (ICI) settings. (The program also incorporates the installation of new meters on newly constructed services in City of Windsor, both residential and ICI.) Through this program, WUC installed 4,858 new meters in 2013 (appx. 7% of our total meter population). The average age of our total meter population is 12 years. For ICIs only, the average age is 3. The benefits new meters provide include: increased accuracy in billing for our customers; improved efficiency in meter reading as reads can be obtained via radio frequency (RF); enhanced ability to identify the sources and manage the causes of non-revenue water, thereby limiting revenue loss for both WUC and City of Windsor. The program will continue in 2014, with efforts being focused on pit meter replacements, and the completion of certain segments of the downtown core area, where we hope to enable entire meter reading routes to be read with a "drive-by" (RF) method. Approximately 30% of our meters are now RF-enabled. The goal of WUC's ongoing Water Meter Replacement Program is to replace all damaged, frozen, defective, aging and obsolete water meters, both in residential and industrial, commercial and institutional (ICI) settings. 10

11 Bulk Water Filling Station WUC completed the installation of one new fill station in 2013 located at Caron and Elliott. The final location was chosen through consultation with both City of Windsor, and our partners in the Heavy Construction Association (HCA). WUC currently has four bulk fill stations in various locations throughout the distribution system. Bulk Water programs are common practice in our business, and they provide many benefits, not the least of which is the ability to accurately gauge the local construction industry s usage requirements, and then charge for that usage accordingly. Revenues from the Hydrant Permit / Usage program, volumes used, capital cost recovery considerations, and consistency with our peer group were all factors in the determination of our Bulk Water Rate, which remains at the value set in $1.96/m3. 11

12 Watermain Replacement Program The overall WUC capital renewal program involved the replacement of approximately 19.2 km of existing cast and ductile iron watermains and water services with new PVC pipelines and polyethylene/copper tubing respectively. Water services are typically replaced from the new main to property line. This project included watermains, which no longer provided adequate service and were deemed to have the highest risk to public health. Installed 145 hydrants Abandoned 112 hydrants The Ministry of the Environment (MOE) and Ontario Fire Codes (OFC) mandate minimum levels of performance required throughout the water distribution system. The renewal of a cast iron watermain is prioritized based on the following criteria: 1. Low chlorine residual due to internal tuburculation (corrosion) 2. Lead services in Right of Way ( R.O.W) 3. High frequency of water quality complaints taste and odor, discoloured water 4. High frequency of breaks, both mainline and services 5. Inadequate fire flow capacity 6. Low water pressure 7. Lifecycle replacement WUC projects are prioritized based on a scoring system algorithm. A point score is assigned to the seven (7) criteria listed above to determine the priority of the project. The higher the risk to public health and safety, the higher the score, hence, the higher the priority status assigned. 12

13 Hanna Tower Rehabilitation Exterior The current facilities were constructed in The elevated tank stores a maximum of one million gallons of drinking water for supply to the residents of the City of Windsor. It is a multi-leg structure with a center standpipe for the in/outflow of water into the elevated tank. The main critical components requiring maintenance include the main support legs, interior coating, exterior coating and maintenance access platforms. The scope of the first phase (completed in 2012) included structural repair of all access ladders, access ports, fall arrest and rescue systems, installation of new lightning arrestors, repair of base support concrete and application of a new anti-corrosion coating on the interior of the tower. The second phase of the rehabilitation was carried out in The project involved removing the existing external anti-corrosive coating, preparing the surface and applying the new coating. In addition, structural improvements were made to the tank by installing a structural metal band around the entire circumference of the tank at the waterline. This issue was identified during the application of the interior coating in 2012 which was caused primarily by ice formation during the winter months. To reduce the formation of ice a submersible tank mixer was installed which in turn will extend the life of the new interior coating and structural steel. 13

14 Model Predictive Pressure Control The Windsor Utilities Commission (WUC) utilizes three pumping stations George, A.J. Brian and J.F. Cook. A.J. Brian has 4 electric pumps (one with a Variable Frequency Drive VFD), George has 3 electric pumps and J.F. Cook has 3 electric pumps (one with a VFD). All pumps have analog valve positioners. By utilizing the VFD s and valve positioners WUC is able to provide stable pressure throughout daily demand shifts. This new control approach encompasses: 1) Managing pump starts and stops, to offset pressure spikes. 2) Controlling the header pressure by manipulating control elements to match flow with demand. 3) A top-level embedded supervisory MPC system to monitor multiple metering station pressures and continually drive the header pressure lower while ensuring minimum pressure constraints around the city. The overall project strategy focused on control to keep high lift pump pressure to a minimum, based on maintaining minimum pressure targets at distribution metering stations around the service area. Additionally, incorporating FCVs into the control system reduced pressure fluctuations on pump start-up/shutdown and lessened the stress on the aging infrastructure. These improvements were made possible through the implementation of onboard Model Predictive Control, which provided many benefits as well as contributing to streamlined and efficient flow and pressure control. 14

15 Appendix A Operational Charts 15

16 Table Treated Water Volume Total Pumped Volume Daily Average Volume Maximum Daily Volume Minimum Daily Volume Instantaneous Peak Volume Town of Lasalle Volume Town of Tecumseh Volume MONTH ML ML ML ML ML ML ML ML JANUARY 3, FEBRUARY 3, MARCH 3, APRIL 3, MAY 4, JUNE 4, JULY 4, AUGUST 4, SEPTEMBER 3, OCTOBER 3, NOVEMBER 3, DECEMBER 3, TOTAL , , ,425.2 AVERAGE 3, ,202.1 City of Windsor Volume Note: Volumes reported in megalitres (ML) 16

17 Table Volume as a Percentage of Approved Plant Capacity Date Average Daily Flow (MLD) January February March April Plant Capacity % Average Daily Flow (MLD) Plant Capacity % Average Daily Flow (MLD) Plant Capacity % Average Daily Flow (MLD) Plant Capacity % Average Daily Flow (MLD) May June Plant Capacity % Average Daily Flow (MLD) Plant Capacity % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 17

18 Table Volume as a Percentage of Approved Plant Capacity Date Average Daily Flow (MLD) July August September October Plant Capacity % Average Daily Flow (MLD) Plant Capacity % Average Daily Flow (MLD) Plant Capacity % Average Daily Flow (MLD) Plant Capacity % Average Daily Flow (MLD) November December Plant Capacity % Average Daily Flow (MLD) Plant Capacity % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % 18

19 Table Microbiological Sample Count Month January February March April May June July August September October November December DISTRIBUTION TREATED RAW TOTAL

20 Table Distribution Chlorine Residuals JANUARY TO MARCH 2013 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 Jan LOW HIGH AVG Feb LOW HIGH AVG Mar LOW HIGH AVG Quarterly Avg APRIL TO JUNE 2013 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 Apr LOW HIGH AVG May LOW HIGH AVG Jun LOW HIGH AVG Quarterly Avg

21 Table Distribution Chlorine Residuals JULY TO SEPTEMBER 2013 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 Jul LOW HIGH AVG Aug LOW HIGH AVG Sep LOW HIGH AVG Quarterly Avg OCTOBER TO DECEMBER 2013 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 Oct LOW HIGH AVG Nov LOW HIGH AVG Dec LOW HIGH AVG Quarterly Avg (.05 mg/l - minimum standard per Ministry of Environment) (.20 mg/l - miminum WUC standard) 21

22 Table Operational Parameters JANUARY FEBRUARY MARCH PLANT PARAMETERS HIGH LOW VALUES HIGH LOW AVG. HIGH LOW AVG. HIGH LOW AVG. HIGH (*1) LOW HIGH (*2) LOW FLUORIDE (*1) mg/l * COLOUR (*2) TCU <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 < ALUMINUM (*1) ppb 44.0 < < < ph (*2) TURBIDITY (*1) NTU HARDNESS (*2) mg/l TEMPERATURE o C <15 o C ODOUR/TASTE (---) (---) (---) (---) (---) (---) (---) (---) (---) in-offensive in-offensive ALKALINITY (*2 and *3 mg/l CHLORINE RESIDUAL (*1) mg/l M.O.E. MAC OPERATIONAL GUIDELINE <15 APRIL MAY JUNE HIGH LOW AVG. HIGH LOW AVG. HIGH LOW AVG. HIGH (*1) LOW HIGH (*2) LOW FLUORIDE (*1) mg/l COLOUR (*2) TCU <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 < ALUMINUM (*1) ppb 66.0 < ph (*2) TURBIDITY (*1) NTU HARDNESS (*2) mg/l TEMPERATURE o C <15 o C ODOUR/TASTE (---) (---) (---) (---) (---) (---) (---) (---) (---) in-offensive in-offensive ALKALINITY (*2 and *3 mg/l CHLORINE RESIDUAL (*1) mg/l * Note Fluoride Addition Ceased March 25, 2013 PLANT PARAMETERS HIGH LOW VALUES M.O.E. MAC OPERATIONAL GUIDELINE <15 22

23 Table Operational Parameters JULY AUGUST SEPTEMBER PLANT PARAMETERS HIGH LOW VALUES HIGH LOW AVG. HIGH LOW AVG. HIGH LOW AVG. HIGH (*1) LOW HIGH (*2) LOW FLUORIDE (*1) mg/l COLOUR (*2) TCU <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 < ALUMINUM (*1) ppb ph (*2) TURBIDITY (*1) NTU HARDNESS (*2) mg/l TEMPERATURE o C <15 o C ODOUR/TASTE (---) (---) (---) (---) (---) (---) (---) (---) (---) in-offensive in-offensive ALKALINITY (*2 and *3 mg/l CHLORINE RESIDUAL (*1) mg/l M.O.E. MAC OPERATIONAL GUIDELINE <15 OCTOBER NOVEMBER DECEMBER HIGH LOW AVG. HIGH LOW AVG. HIGH LOW AVG. HIGH (*1) LOW HIGH (*2) LOW FLUORIDE (*1) mg/l COLOUR (*2) TCU <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 < ALUMINUM (*1) ppb < ph (*2) TURBIDITY (*1) NTU HARDNESS (*2) mg/l TEMPERATURE o C ODOUR/TASTE (---) (---) (---) (---) (---) (---) (---) (---) (---) ALKALINITY (*2 and *3 mg/l CHLORINE RESIDUAL (*1) mg/l * Note Fluoride Addition Ceased March 25, 2013 (*1) MAC - Maximum Allowable Concentration (*2) Health Canada Operational Guidline (O.G.) (*3) Recommended in coagulant treated drinking water PLANT PARAMETERS HIGH LOW VALUES M.O.E. MAC OPERATIONAL GUIDELINE <15 <15 o C in-offensive in-offensive 23

24 24

25 25

26 Appendix B 2013 O.Reg 170/03 Annual Report 26

27 27

28 28

29 29

30 30

31 31

32 32

33 33

34 34

35 35