Windsor Utilities Commission 3665 Wyandotte Street East Windsor, ON N9A 5T7

Transcription

1 Windsor Utilities Commission Water Treatment Plant 2010 Annual Compliance Report Windsor Utilities Commission 3665 Wyandotte Street East Windsor, ON N9A 5T7

2 2010 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 2010 O. Reg 170/03 Annual Report Page 25 2

3 Introduction In 2010 Windsor Utilities Commission produced 52,050,518 million litres of potable water for the 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 Total Treated Water by Municipality City of Windsor 83% Town of Tecumseh 10% Town of Lasalle 7% 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 Volume of Approved Capacity ML Maximum Approved Capacity Avg Daily Flow (MLD) Time (Days)

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 2010, 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 2010, 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. In the calendar year 2010, this section of the regulation was fully complied with Operational Parameters January February March April May June July August September October November December Time (Months) Fluoride (mg/l) Turbidity (NTU) Chlorine Residual (mg/l) 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 2010, 2455 samples were collected and analysed, an average of 205 samples per month. Approximately 68% 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 Microbiological Sample Count January February March April May June July August September October November December DISTRIBUTION TREATED RAW 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 2010 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 2010 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 2010 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 January 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, 2009 April 15, 2010 and the second set from June 15, 2010 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 2010, 325 samples were collected and analysed, 165 for the first round and 160 for the second round. Of the samples tested 55 samples exceeded the 10 mg/l reporting requirement. In the Calendar year 2010 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 2010, there were 57 adverse incidents requiring notification of the Medical Officer of Health and the Ministry of Environment. Of these, 38 resulted from Category 3 service line breaks (contamination of service line due to break with known or suspected contamination), 4 resulted from Category 3 water main breaks (contamination of water main due to break with known or suspected contamination), 7 resulted from free chlorine being less than 0.05 mg/l within the 8

9 distribution system, 3 incidents resulted from the presence of coliform, 2 incidents arose as a result of lead sampling testing, 1 resulted from a compromised fire hydrant connection, 1 arose from high filter effluent turbidity and 1 resulted from high bromates. 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. Adverse Water Quality Incidents Service Main Bacteria Free Chlorine Lead 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 2010 treated water volume (Table 1), 2010 volume as a percentage of approved plant capacity (Table 2), 2010 microbiological sample counts (Table 3), 2010 distribution chlorine residuals (Table 4) and 2010 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 2010 Annual Report as previously submitted and as required by the regulation. 9

10 Capital Renewal Program Several capital projects were undertaken in 2010 including Water Meter Replacement Program Water Meters, Watermain Replacement Program, Fire Hydrant Replacement, Replacement of Filter Media, Replacement of Medium/Low Voltage Components at J.F. Cook and A.J. Brian Pump Station and Replacement of Supervisory Control and Data Acquisition (SCADA) Hardware and Software for the Production Facility. Brief descriptions of each project are noted below. Water Meter Replacement Program The purpose of this project is to replace damaged, frozen, defective and obsolete water meters in residential, as well as industrial, commercial and institutional (ICI) service. A water meter replacement program provides accurate billing to our customers, limits revenue loss to WUC and the City of Windsor, while providing accurate usage data information to the water department. Through the implementation of a water meter replacement program, WUC targeted meters that were registering zero reads as a result of vandalism, damage by others or due to freezing. Additionally, meters deemed obsolete or failing to record the correct volume of water being used, were also targeted by this project WUC proactively changed out 3765 meters in our system through the information discerned from our monthly billing cycles and as called in via the Customer Service Centre (CSC) call intake process. This project also incorporated the installation of new meters at newly created water service points. 10

11 Watermain Replacement Program This project was part of the overall WUC capital renewal program and involved the replacement of approximately 16.8 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 133 hydrants Abandoned 105 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. 11

12 Replacement of Filter Media The filters were originally constructed, loaded and put into service in 1992 and, while there has been ongoing annual filter maintenance, there have been no significant changes made to the filters since their installation. For this type of filter, typical life expectancies would be on the order of between ten and fifteen years, as such the filters, more specifically, the filter-media, is at or near the end of its expected life cycle. It is a multi-year project which began in 2008 and was completed in the 2 nd quarter of

13 Medium/Low Voltage (MV/LV) Electrical Components The purpose of this project is to bring the Water Production medium/low voltage electrical facilities up-to-date and into conformance with current electrical safety standards. Moreover, the installation of new electrical distribution equipment will minimize the potential for a single source of failure at the A.J. Brian pumping station. This was a multi-year project which commenced in 2009 and was completed in This project upgraded all electrical facility distribution components at the A.J. Brian pumping station and J.F. Cook Reservoir and booster station. The system conforms to all current electrical safety standards and provides redundancy thereby ensuring operation of the critical high and low lift pumping stations. These components are the lifeline to ensure the provision of safe and reliable drinking water within the City of Windsor and surrounding municipalities. 13

14 Supervisory Control and Data Acquisition (SCADA) Hardware and Software Upgrades The purpose of this project is to bring the Water Production controls and system management infrastructure to required levels of functionality, reliability and conformance for immediate and long-term safe and reliable water production. It is a multi-year project which began in 2009 and was completed in This project will upgrade the management operating environment, or SCADA system (System Control And Data Acquisition), implement double redundancy (2n) on critical system controllers and improve management reporting capability for productivity improvements and Ministry of the Environment (MOE) compliance. 14

15 Appendix A Operational Charts 15

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25 Appendix B 2010 O.Reg 170/03 Annual Report 25

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