University of British Columbia. Drinking Water Quality Monitoring Report 2015

Transcription

1 University of British Columbia Drinking Water Quality Monitoring Report 25 June 26

2 University of British Columbia Drinking Water Quality Monitoring Report 25 Executive Summary The University of British Columbia implemented a Drinking Water Quality Monitoring Program in 22. This monitoring program was developed based on the standard program adopted by Metro Vancouver member municipalities, the Guidelines for Canadian Drinking Water Quality (GCDWQ), and input from the Vancouver Coastal Health Authority. With this approved monitoring program in place, UBC has collected and analyzed water quality data since 22. This report outlines this program and its results for the year 25. The implementation of the Drinking Water Quality Monitoring program was a significant commitment made by UBC to monitor the delivery of safe and high quality water. It generates valuable data for gaining understanding of UBC s water distribution system and for evaluating the historic performance of the system in a reliable and systematic way. Most importantly, it allows for potential health hazards to be identified and consumer s water concerns to be addressed. The sampling analysis results have demonstrated a satisfactory performance of the UBC distribution system. There were no recorded instances of E. coli detected in 25. There were four recorded instances of total coliforms in 25. Two events did not exceed the BC Drinking Water Protection limit for total coliforms. UBC employs a multibarrier approach to protect its water distribution system. In the two instances where total coliforms exceeded the BCDWPR, all other parameters tested were normal and no total coliforms were present in subsequent tests. Concerns in regards to total coliforms were addressed by an increased spot-flushing program. All water quality complaints were responded to by either the Facility Managers or UBC Energy and Water Services (EWS) and were resolved satisfactorily. In most cases issues were internal to a building and the distribution system s quality was not a factor. A protocol for recording complaints is included in the UBC Emergency Response Plan Water Utility. UBC is committed to delivery of water of the highest quality, and will continue to make the necessary investment to ensure its continued success. i

3 University of British Columbia Drinking Water Quality Monitoring Report 25 ACRONYMS AO Aesthetic Objective (characteristics such as taste, colour, appearance, temperature that are not health related) BCDWPR British Columbia Drinking Water Protection Regulation CFU Colony Forming Units DBP Disinfection By-product E. coli Escherichia coli EPA Environmental Protection Agency (USA) ERP Emergency Response Plan GCDWQ Guidelines for Canadian Drinking Water Quality GVWD Greater Vancouver Water District HAA Halo acetic Acid HPC Heterotrophic Plate Count IMAC Interim Maximum Acceptable Concentration MAC Maximum Acceptable Concentration MCL MDA Maximum Contaminant Level Minimum Detectable Activity MDL Method Detection Limit MF Membrane Filter mg/l Milligram per litre (. g/l) g/l Microgram per litre (. g/l) ml Milliliter mj/cm 2 Millijoule per centimeter squared MPN Most Probable Number MV N/A Metro Vancouver Not Available NTU Nephelometric Turbidity Unit OG Operational Guidance value Measure of acidity or basicity of water; 7 is neutral ppb Parts per Billion (Equivalent of microgram per litre) ppm Parts per Million (Equivalent of milligram per litre) SCFP Seymour-Capilano Filtration Plant THAA5 Total Halo acetic5 Acids THM Trihalomethane TOC Total Organic Carbon TTHM Total Trihalomethane UBC EWS University of British Columbia Energy and Water Services UDF Unidirectional Flushing UEL University Endowment Lands VCH Vancouver Coastal Health WHO World Health Organization WQMRP Water Quality Monitoring and Reporting Plan ii

4 University of British Columbia Drinking Water Quality Monitoring Report 25 Table of Contents. Introduction Water Distribution System Testing and Monitoring Program Routine Monitoring Sampling Parameters Sampling Locations Sampling Frequency Non-routine Monitoring Sample Analysis Results Summary... 8 References:... 9 APPENDICES: Appendix A Appendix B Appendix C Appendix D Water Sampling Sites Site Map Sample Analysis Results Metro Vancouver and Municipal Response Procedure Source Water Quality Summary Tables for Capilano, Seymour and Coquitlam Reservoirs iii

5 University of British Columbia Drinking Water Quality Monitoring Report 25. Introduction The purpose of this report is to provide a summary of the Drinking Water Quality Monitoring Program during 25 for the UBC Utilities water distribution system. During 25 the provision of drinking water was governed by the Drinking Water Protection Regulation (pursuant to the Drinking Water Protection Act). This regulation requires suppliers of drinking water in BC to: Develop a process to notify the Drinking Water Officer (DWO) of situations or conditions that render or could render the water unfit to drink; Implement a plan for collecting, shipping and analyzing water samples in compliance with the direction set by the DWO; Implement a plan for reporting monitoring results to the DWO and to water users including the preparation of an annual report; Implement an emergency response and contingency plan. UBC EWS monitors the water quality in the UBC distribution system on a weekly basis in accordance with their Drinking Water Quality Monitoring Program. Appendix B includes a graphic summary of test results for 25. This document includes a brief introduction to UBC s water distribution system and its drinking water monitoring and testing program. The remaining parts of this document summarize the results and analysis of water samples collected in 25 and evaluates the distribution system s performance in delivering safe and quality drinking water. May 26 Page

6 University of British Columbia Drinking Water Quality Monitoring Report Water Distribution System UBC receives bulk treated water from Metro Vancouver s Water District (GVWD) through two supply points via the University Endowment Lands. Water is then supplied to UBC s customers through its distribution system. UBC has developed a comprehensive operations and maintenance (O&M) program for the water distribution system to ensure the highest quality water is delivered at sufficient quantity and pressure to its customers. The O&M program in 25 included a water quality testing program and flushing of problem areas; system pressure controls were adjusted to improve flow and chlorination to some areas, as well as installation of new main line pipes and appurtenances in a number of areas.. UBC Source Water: UBC s drinking water comes from three northern mountainous watersheds managed by Metro Vancouver. The watersheds are protected from urban development, closed to public access and managed as assets of the highest importance to the region. The water in these watersheds originates from rainfall and snow melt and is collected in the three reservoirs: Capilano, Seymour and Coquitlam. Metro Vancouver is responsible for all treatment of source water to meet Health Canada s Guidelines for Drinking Water Quality. Metro Vancouver also tests and analyses water in their transmission piping and reservoir network to ensure delivery of quality potable water to its member municipalities. Water treatment by disinfection destroys disease-causing pathogenic organisms and secondary chlorine disinfection of water downstream helps to prevent bacterial regrowth in the distribution systems. UBC does not further treat the water. For more information see: See appendix D for summary tables of source water quality for Capilano, Seymour and Coquitlam reservoirs. 2. Capital Improvements to the system are made as areas are redeveloped or new development takes place. Old water mains are replaced, enlarged and or extended, dead ends eliminated and new hydrants, valves and services installed. a) Centre for Brain Health As part of the ongoing development of the Centre for Brain Health a new service connection was installed which consisted of 47m of 5mm DI pipe. b) West Mall at Kenny Building The student housing expansion project at Ponderosa required upsizing of distribution water piping to meet the increased demands. 9m of 25mm DI pipe was installed to replace the existing 2mm CI pipe on West Mall. Included in the works was replacement of hydrants and new valving. May 26 Page 2

7 University of British Columbia Drinking Water Quality Monitoring Report 25 c) Wesbrook Mall Switchover On Wesbrook mall near University Blvd., 92m of 5mm DI piping was installed. The existing services were switched over from the existing CI supply main to the new main and the CI main was abandoned. d) Purdy Pavillion As part of the Health Precinct improvement project the water distribution system was looped from Wesbrook Mall to Health Sciences Mall. The loop consisted of 64m of 2mm DI piping and 58m of 3mm DI piping in with new hydrants and valves. The loop will result in increased fire flow in the area and water quality will be easier to maintain. e) War memorial Gym (site B) At the War Memorial Gym (site B) the existing CI service was replaced with a DI service piping. In addition as crews were mobilized on site, the piping in area was reconfigured for future development. Altogether 8m of 5 mm DI, 87 m of 2mm DI pipe and 49m of 25mm DI pipe was installed and the existing CI pipe on Wesbrook Mall was abandoned. f) East Mall at Hebb Building On East Mall opposite the Hebb Building, 4m of 25mm DI pipe was installed. The DI pipe replaced the existing 2mm CI pipe. The project accomplished both increased fire flow in the area but also improved UBC s efforts to maintain good water quality. g) North Parkade Switchover The service to the North Parkade was switched over from the existing CI pipe to a previously installed DI main the CI pipe was then abandoned h) Public Safety Building At the Public Safety Building on Wesbrook Mall, 47m of 2mm DI pipe was installed to replace the existing CI pipe in the area. i) Okanagan House At Okanagan House a broken water main prompted emergency replacement of 27m of 2 mm CI pipe with 2mm DI piping. j) UBC Athletic Sports Field This large distribution system installation is comprised of 478m of 2mm DI pipe, 8m of 5mm DI pipe, 38m of mm DI pipe and 38m of 75mm PVC pipe. The project replaced the existing CI distribution piping, supplied services to two new buildings and an irrigation system network. k) Acadia/Salal Daycare In order to solve a low flow problem in the area of Salal Daycare with resulting water quality concerns, the domestic service was replaced and switched to a DI water main. May 26 Page 3

8 University of British Columbia Drinking Water Quality Monitoring Report UBC Emergency Response Plan Water Utility The UBC ERP-WU includes different possible emergency scenarios, protocols, procedures and staff responsibilities in emergencies. Revisions to the plan in 25\26 included contact name updates and distribution system changes. In addition to these scenarios, if an extraordinary turbidity event occurs, the Metro Vancouver and Municipal Response Procedure will be followed (see Appendix C of the ERP). 4. Cross Connection Control Program - The consolidation of the different programs into UBC EWS Cross Connection Control Program occurred in 27 with a full survey in 28. At that time a computerized database and tracking system was implemented and 838 devices are now tracked. EWS also oversees the UBC Academic and Hospital CCC Programs. The number of assemblies registered increased by 4% in 25. The program incorporates testing and annual certification of devices as well as site inspections. EWS also provides advice and oversight on new installations at existing, non-compliant facilities. A full survey of all facilities will be planned for 25/6. Below is a table of the history of the program. Year Total Devices Devices Tested Outstanding % Compliance % % % % % % % % Below is a summary of average annual water purchased by UBC over the last years. After a number of water conservation initiatives in the early part of the decade, overall consumption at UBC is on the rise again due to increased population; mainly at the South Campus neighbourhood area. May 26 Page 4

9 University of British Columbia Drinking Water Quality Monitoring Report 25 May 26 Page 5

10 University of British Columbia Drinking Water Quality Monitoring Report Testing and Monitoring Program Drinking water quality is a function of source water quality, water treatment, and water quality changes after treatment. As a result, monitoring of drinking water quality consists of three components: source water monitoring, monitoring after treatment, and monitoring in the distribution system. While Metro Vancouver s Water District carries out testing of water at the source and testing after treatment, UBC s Drinking Water Quality Monitoring Program is focused on monitoring the water quality within its own water distribution system. The monitoring and testing program consists of routine monitoring, for obtaining an accurate overview of water quality within the distribution system, and non-routine monitoring, for handling complaint and emergency situations. Monitoring includes two components: collection of the sample and laboratory analysis of the sample. 3. Routine Monitoring The collection of water samples was completed as part of an annual contract with CARO Environmental Services from sampling sites within UBC on a regular basis. These water samples were then forwarded to laboratories for analysis. The collection, transportation and analysis of samples were performed in accordance with the Standard Methods for the Examination of Water and Wastewater 2 st Edition. All analyses were conducted by laboratories that are approved by Canadian Association of Environmental Analytical Laboratories or an equivalent certification program for the other tests performed. All testing parameters except vinyl chloride were analyzed by the laboratories of Metro Vancouver. Analysis of vinyl chloride, a volatile organic compound, was tested by the laboratory of CARO Analytical Services. 3.. Sampling Parameters The parameters that were analyzed are summarized in the following table: Table. Sampling Parameters Microbiological Chemical and Physical Radiological PARAMETERS Total Coliforms, E. coli, Heterotrophic Plate Count (HPC) Turbidity, Temperature, Free Chlorine Residual,, Aluminium, Copper, Iron, Lead, Zinc, Halo acetic Acids (HAAs), Trihalomethanes (THMs), Vinyl Chloride Odour/Taste (complaint basis) None May 26 Page 6

11 University of British Columbia Drinking Water Quality Monitoring Report 25 Guidelines for chemical and physical parameters are:. (MAC) Health based and listed as a maximum acceptable concentration. 2. (AO) Based on aesthetic considerations and listed as an aesthetic objective; or 3. (OG) Established based on operational considerations and listed as an operational guidance value. The significance of the parameters of most relevance is briefly discussed below. Further details regarding the parameters listed in the above table can be found by accessing the supporting documents of the GCDWQ through the following web site, or by contacting Health Canada at (63) Total and E. coli Coliforms One of the primary concerns in water quality is the growth of coliform bacteria. The presence of total coliforms indicates that treatment is inadequate or that the distribution system is experiencing regrowth of the bacteria in distribution system biofilms or intrusion of untreated water. Exceedances of the distribution system goal should be investigated. The presence of E. coli indicates a possibility of fecal contamination. Escherichia coli (E. coli) is used as an indicator of the microbiological safety of drinking water; if detected, enteric pathogens may also be present. Heterotrophic Plate Counts Heterotrophic Plate Counts (HPC) are used to estimate the general bacterial population. Historically the HPC test has been used to indicate when conditions in the distribution system are favourable for the growth of bacteria. It was felt that if the growth of heterotrophs is controlled, growth of coliforms should also be controlled. However there is uncertainty as to the significance of the HPC test. The Canadian Drinking Water Quality Guidelines removed HPCs as an indicator of drinking water quality. Monitoring for HPCs has been maintained to assist in understanding changes in operational conditions to the system. Unlike other indicators such as Escherichia coli or total coliforms, low concentrations of HPC organisms will still be present after drinking water treatment. In distribution systems HPC provides some indication of stagnation, tuberculation, chlorine residual, and available nutrients for bacterial growth. High HPC measurements have not been found to correlate with illness incidence and no outbreaks have been directly linked to elevated concentrations of HPC flora in tap water; however a sudden rise in HPC measurements collected from a site that has traditionally had low counts is an indicator that something has changed in the system and should be investigated. UBC uses the historical figure of 5 CFU/mL as a baseline measurement that will trigger investigation into possible changes in the distribution system. May 26 Page 7

12 University of British Columbia Drinking Water Quality Monitoring Report 25 Free Chlorine Residual Free chlorine residual provides a good indication of water quality within the distribution system. Low chlorine residual may indicate deteriorating water quality as a result of bacterial regrowth or stagnant water. Maintaining a free chlorine residual of at least mg/l in the distribution system has been observed to reduce the level of HPC. Turbidity Turbidity in water is caused by suspended matter, such as clay, slit, organic and inorganic matter. Controlling turbidity is important for both health and aesthetic reasons. Bacteria, viruses and protozoa can adhere to suspended particles in turbid water and thus be protected from disinfection. Also, excessive turbidity detracts from the appearance of treated water and has often been associated with unacceptable tastes and odours. Disinfection Byproducts Halo acetic acids (HAAs) and Trihalomethanes (THMs) are disinfection byproducts and are formed in drinking water when chlorine reacts with organic matter that is naturally present in raw water supplies. Research suggests that HAAs have an adverse impact on human health and may possibly be carcinogenic. The most common THM is chloroform. Chloroform is also classified as being possibly carcinogenic to humans. There is a tradeoff between reducing risk from disinfection byproducts and having enough chlorine to provide water safe from bacteria and parasites. Copper Copper is used extensively in plumbing for domestic water systems. Although copper is frequently found in surface water, distributed water contains considerably more copper than the original water supply because of the dissolution of copper from copper piping. Copper can stain laundry and plumbing fixtures and cause an undesirable bitter taste in water. Copper intake at extremely high doses can result in adverse health effects. Iron Iron is naturally present in food and drinking water. However, there is no evidence to indicate that concentrations of iron commonly found in food or water constitute any hazard to human health. Iron can stain laundry and plumbing fixtures and cause undesirable tastes in beverages. The precipitation of excessive iron imparts an objectionable reddish-brown color to the water. Iron may also promote the growth of certain microorganisms, which can lead to the deposition of a slimy coat in piping. Lead Lead was used in drinking water plumbing and as solder in distribution systems. Older distribution systems may also be made from lead pipe. Lead is present in tap water as a result of dissolution from natural sources or from household plumbing systems. Lead is a cumulative general poison and has been classified as being potentially carcinogenic to humans. Fetuses, infants, young children and pregnant women are most susceptible to adverse health effects. In order to minimize exposure to lead introduced into drinking water from plumbing systems, it is recommended that only cold water be used, after an May 26 Page 8

13 University of British Columbia Drinking Water Quality Monitoring Report 25 appropriate period of flushing to rid the system of standing water, for sampling, drinking, beverage preparation and cooking. Vinyl Chloride The presence of vinyl chloride in potable water is associated mainly with the use of polyvinyl chloride (PVC) water pipes manufactured with incompletely polymerized vinyl chloride monomer. Acute exposure or chronic inhalation exposure results in a variety of adverse effects in humans. Sufficient evidence has accumulated to implicate vinyl chloride as a human and animal carcinogen. Zinc Although zinc is present in surface waters at low concentrations, levels in tap water can be considerably higher due to the use of zinc in plumbing materials. Water containing zinc in excess concentrations has an undesirable astringent taste and may develop a greasy film upon boiling. Long-term ingestion of zinc in quantities considerably in excess of the daily requirement has not resulted in adverse effects. is controlled in water to minimize corrosion and incrustation. Corrosion may increase below 6.5 and incrustation and scaling may increase above 8.5. There is also a decrease in the efficiency of chlorine disinfection processes with increasing levels. In addition, through discussions with Metro Vancouver, it was noted that assists in the interpretation of sampling results for disinfection by-products, and thus should be sampled at the same time. May 26 Page 9

14 University of British Columbia Drinking Water Quality Monitoring Report Sampling Locations Sampling locations are distributed in different areas within UBC so as to obtain an accurate overview of water quality of the distribution system. The 6 locations were strategically selected based on land use and system configuration. They include residential area supply, high-density residential area supply, institutional area supply, and water source supply. These locations are illustrated in Figure in Appendix A. To date 5 of the stations are installed and operational with the remaining station to be installed with proposed system upgrades. Site Location Flow Description Category WQB7- Iona Drive at Theology Low VST Residences Mall WQC3-2 NW Marine east of West Low Supply to Residences Mall WQD2-3 Place Vanier west of Low Place Vanier Residences Lower Mall WQH3A-4 Lower Mall south of Low Totem Park Residences Agronomy Rd. WQH3B-5 Tap in Totem Park Service Connection WQL3-6 Stadium Rd. east of Medium Thunderbird Stadium Main Mall WQJ5-7 Thunderbird Crescent Low Thunderbird Residences WQG6-8 Health Sciences Mall Medium Hospital Supply WQF7B-9 Wesbrook Mall south of Univ. Blvd. Medium Hospital Supply WQF7A- (future) Univ. Blvd. At Wesbrook Mall Source Main Pump Station Supply WQJ- Fairview Place west of Acadia Rd. Medium Acadia Residences and PVC in area WQM8-2 Hampton Place Low Hampton Place Residences WQN9-3 6 th Ave. at UBC border Source Low Pressure Feed WQQ6-4 Animal Science Low Animal Science Area WQQ7-5 Wesbrook Mall at BC Research Medium Supply to BC Research and Triumph WQT7-6 Nurseries Road at Triumf Dead End Supply to Environment Services 3..3 Sampling Frequency UBC, as a purveyor of drinking water to a maximum population of approximately 5,-6, is required to test at least 4 samples per 3 day period as outlined in the Drinking Water Protection Regulation. In general, parameters that have greater effects on health were sampled and analyzed more often than those that only affect the May 26 Page

15 University of British Columbia Drinking Water Quality Monitoring Report 25 aesthetic quality. The sampling frequency of different parameters from different sampling locations is summarized in Table 3. In 26 sampling frequency has been increased to 5 samples per 3 day period to compensate for the population increase as UBC continues to grow. Table 3. Sampling Frequency Frequency: WEEKLY QUARTERLY SEMI-ANNUALLY Parameters: Total coliforms E. coli HPCs Free chlorine residual Turbidity Temperature Halo acetic Acids Temperature Trihalomethanes Copper Zinc Lead Iron Temperature Vinyl chloride Site Category: Various Campus Areas Various Campus Areas Tap in Building and Campus Areas 3.2 Non-routine Monitoring CARO Environmental Services was on-call for monitoring water quality complaints and emergency situations. The UBC Emergency Response Plan Water Utility includes a protocol for recording consumer complaints to ensure efficient response and follow up. In any emergency situation the procedures outlined in the UBC Emergency Response Plan were followed. Water Quality Complaints Four water quality complaints were received by UBC in 25.. After an investigation the first instance was determined to be an internal building problem and the owner was directed to call a testing lab if the problem continued. 2. The second complaint involved an internal renovation causing water quality concerns for residents. UBC flushed mains in area as a precaution. The contractor was instructed to flush the building distribution system. 3. The third complaint involved a daycare service connected to an aging CI pipe which also had low flow characteristics. The problem was resolved by reconnecting the service to a DI main. 4. The last case was the result of routine hydrant maintenance resulting in a temporary discolouration of the water supply to a library. In each case local distribution mains were flushed and water retested to confirm good water quality. May 26 Page

16 University of British Columbia Drinking Water Quality Monitoring Report Sample Analysis Results A total of 63 samples were taken from the water distribution system during 25. Most samples did not exceed the limits set out in the BCDWPR or the GCDWQ. The sample analysis results are summarized in Table 4 below, and some of the parameters worth noting are discussed in this section. It should be noted that the limits contained within the GCDWQ are recommendations only and representative of best practices. These can become requirements if the Drinking Water Officer places a condition on the Operating Permit for UBC. At present there are no such conditions placed on UBC. Table 4. Summary of Analysis Results * Sample Station Samples Taken HPC CFU/ml Free Chlorine Residual mg/l Turbidity NTU Positive Coliform Tests Positive E. coli tests Low Average High Low Average High Low Average High WQB7- (UBC-) None None WQC3-2 (UBC-2) None None WQD2-3 (UBC-3) None WQH3A-4 (UBC-4) None WQL3-6 (UBC-6) None None WQJ5-7 (UBC-7) None None WQG6-8 (UBC-8) None None WQF73-9 (UBC-9) None None WQJ- (UBC-) None None WQM8-2 (UBC-2) None None WQN9-3 (UBC-3) None None WQQ6-4 (UBC-4) None WQQ7-5 (UBC-5) None WQT7-6 (UBC-6) None None UBC Average 2.9 UBC Total 63 4 Standard Limits GCDWQ < 5 > < BCDWPR < < *For reporting averages, test results below the detectable limit are given a value of. Coliform The BCDWPR requires that () no sample should contain Escherichia coli (E. coli) and that (2) no sample should contain more than total coliform per millilitre and not more than % of samples from the distribution system in a given calendar month should show the presence of total coliform bacteria. Of the 63 samples analyzed for microbiological criteria in 25, no E. coli was detected. There were four recorded instances of total coliforms during 25. Although the presence of total coliforms (in the absence of E.coli) is of no immediate public health significance, total coliform detection above per mg/l as regulated by the BCDWPR triggers an immediate investigation and corrective actions taken in order to maintain the overall bacteriological quality of the water. May 26 Page 2

17 University of British Columbia Drinking Water Quality Monitoring Report 25 UBC uses a multi-barrier approach to maintaining good water quality using a number of indicators such as free chlorine, HPC, turbidity,, temperature and total coliforms. Abnormal changes to any of these parameters are considered as indication that something has changed in the distribution system and an investigation is conducted to determine the cause. In these instances all other parameters appeared to be normal. Although only two of the four samples exceeded the total coliform limit set by the BCDWPR, UBC immediately carried out spot flushing and retested all four stations. The lab results after retesting proved negative and subsequent samples have shown no presence of total coliforms and indicate water of good quality. The presence of total coliform bacteria in water in the distribution system in isolated non-consecutive tests normally indicates bacterial re-growth in the system. Re-growth is a phenomenon seen in many water distribution systems even though there has been no loss of primary treatment or loss of system integrity, which might result in contamination. Total coliform bacteria are frequently detected in distribution water samples, particularly those samples with low free chlorine residuals. In Metro Vancouver and member water utilities, re-growth typically occurs when the water warms up in the late summer and early fall. During this period it is critical to maintain adequate chlorine residual to as many areas as possible. As UBC has no re-chlorination stations, this is accomplished through spot flushing to draw in fresh water to sensitive areas identified by monitoring chlorine residuals. The maintenance of chlorine residual is dependent on a number of factors: The amount of chlorine in the source water (from Metro Vancouver) The chlorine demand in the water - Amount of organics - Water temperature Residence time of the water in the distribution system. Heterotrophic Plate Count, HPC * Elevated levels of HPC s can be used as an indicator of possible changes in the conditions in a water distribution system. In 25, there were no higher than normal HPC readings recorded. HPC has been removed as an indicator of drinking water quality, by the GCDWQ, however, based on historical data, UBC has retained a figure of 5 CFU/ ml as a baseline measurement in order to assess possible changes in the distribution system. * see explanation for HPC (p.6) Turbidity The GCDWQ guidelines recommend that water entering the distribution system have turbidity levels of. Nephelometric Turbidity Unit (NTU) or less. However, UBC s monitoring program tests only water within its distribution system. Although turbidity measurements cannot automatically be used to interpret the safety of water in the distribution system, a turbidity level below. NTU has been identified as one potential May 26 Page 3

18 University of British Columbia Drinking Water Quality Monitoring Report 25 goal for utilities to use for routine monitoring and operations. Localized turbidity events can be caused by water main flushing or higher velocity draws from the distribution system as a result of construction, firefighting, water main breaks, etc. In 25 the average turbidity at UBC was.3. Turbidity levels above the target of. NTU were briefly observed on eleven occasions; however these events showed no signs of bacteriological impairment and were not repeated at the next test. Free Chlorine Residual Free chlorine residual levels tested in UBC s distribution system were within the recommended levels. In 25 no sampling station within UBC fell below the average free chlorine residual concentration target of mg/l. As with HPC levels, low chlorine residual is a warning sign and not an indication of bacteriological impairment. Chlorine levels are regulated by Metro Vancouver, and at UBC s request has increased chlorine levels to compensate for the longer transmission distance to the campus. With the launch of the Seymour/Capilano Filtration Plant recently, and improvements to UBC s distribution system, there have been no low chlorine events in the last year. Disinfection By-products The source water at WQN9-3 was tested four times for disinfection by-product concentration. See the table below for analysis results. THM (ppb) HAA (ppb) Extra Bromodichloromethane Bromoform Chlorodibromomethane Chloroform Total Trihalomethanes Total THM Quarterly Average (Guileline Limit ppb/ml) Dibromoacetic Acid Dichloroacetic Acid Monobromoacetic Acid Monochloroacetic Acid Trichloroacetic Acid Total Haloacetic Acid Total HAA Quarterly Average (Guileline Limit 8ppb/mL) Sample Date Sampled UBC : < < < <.5 2 < UBC : < < < <.5 9 < UBC : 2 < < <.5 8 < UBC : < < < <.5 9 < Average Average Average units PH The annual average THM concentration of 23 ppb (.2 mg/l) is well below the GCDWQ recommended maximum of ppb (. mg/l). The Canadian guideline level for the Halo acetic group (HAA) is 8 ppb (.8 mg/l.). The average HAA concentration of 26 ppb is 54 ppb below the recommended maximum and is measured at the source water from Metro Vancouver as it enters UBC s distribution system. Some studies have indicated that as water approaches the extremities of the distribution system, HAA levels decrease as residence times increase, especially during summer months as temperature levels rise. Vinyl Chloride Vinyl chloride concentration was tested twice during 25. The tests were both below the detection limit of ppb, which is below the GCDWQ recommended 2 ppb (.2mg/L). May 26 Page 4

19 University of British Columbia Drinking Water Quality Monitoring Report 25 The Aesthetic objective for set out by GCDWQ is Grab samples taken from WQN9-3, tested for at throughout 25. Since is largely determined by source water characteristics, water entering from Metro Vancouver controls its magnitude. Higher than normal levels were discovered in a localized area in the South Campus. With regular flushing normal readings are maintained. The readings were not high enough to be a health concern nor is the area affected in a residential neighborhood. Historical low problems at UBC have improved with the construction of the new water filtration plant at the Seymour watershed. The addition of Ash Soda at that plant maintains the levels above 6.5. It was concluded that the high events at the dead end location on campus were the result of undissolved Ash Soda carried within the water mains eventually dissolving over time. A weekly testing program at this location is ongoing. Should an increased be found, the area is flushed and retested until is reduced. Metals Three sample locations were tested a total of six times for metals during 25. (See table) Sample Name Date Sampled Aluminum Total µg/l Copper Total µg/l Iron Total µg/l Lead Total µg/l Zinc Total µg/l UBC-3 5/5/25 : <.5 <3 UBC-3 /2/25 : <.5 <3 UBC-5 5/5/25 : <.5 3. UBC-5 /2/25 : <.5 <3 UBC-8 5/5/25 : <.5 <3 UBC-8 /2/25 : <3 CGDWQ Health Guidelines N/A N/A N/A N/A CGDWQ Aesthetic Objective N/A 3 N/A 5 CGDWQ Operational Guidance Values 2 N/A N/A N/A N/A All metal levels fall below the recommended guidelines outlined in the GCDWQ. May 26 Page 5

20 University of British Columbia Drinking Water Quality Monitoring Report 25 May 26 Page 6

21 University of British Columbia Drinking Water Quality Monitoring Report 25 May 26 Page 7

22 University of British Columbia Drinking Water Quality Monitoring Report Summary The University of British Columbia implemented a Drinking Water Quality Monitoring Program in 22. This monitoring program was developed based on the standard program adopted by Metro Vancouver member municipalities, the Guidelines for Canadian Drinking Water Quality (GCDWQ), and input from the Vancouver Coastal Health Authority. With this approved monitoring program in place, UBC has collected and analyzed water quality data since 22. The implementation of the Drinking Water Quality Monitoring program was a significant commitment made by UBC to deliver to consumers safe and good quality water. It generates valuable data for gaining understanding of UBC s water distribution system and for evaluating the past performance of the system in a reliable and systematic way. Most importantly, it allows for potential health hazards to be identified and consumer s water concerns to be addressed. The sampling analysis results have demonstrated a satisfactory performance of the UBC distribution system. There were no recorded instances of E. coli detected in 25. There were four recorded instances of total coliforms in 25. Two events did not exceed the BC Drinking Water Protection limit for total coliforms. Concerns in regards to total coliforms were addressed by increased flushing and testing. With the recent launch of the Seymour/Capilano Filtration Plant and improvements to UBC s distribution system, there has been a marked reduction in low chlorine and low events in the last year. A protocol for recording complaints has been developed and is included in the UBC Emergency Response Plan Water Utility. UBC is committed to delivery of water of the highest quality, and will continue to make the necessary investment to ensure its continued success. May 26 Page 8

23 University of British Columbia Drinking Water Quality Monitoring Report 25 References: British Columbia Drinking Water Protection Regulation. Drinking Water Protection Act Reg. 2/23, 23 Guidelines for Canadian Drinking Water Quality Health Canada, Sixth Edition, 996 with updated summary table, October 24. Water Quality Monitoring and Reporting Plan for the METRO VANCOUVER and Member Municipalities, Regional Engineers Advisory Committee (REAC), May 2 Contact Information For more information on the contents of this report please contact: UBC Energy & Water Services 24 West Mall Vancouver, BC V6T Z2 Phone: FAX: May 26 Page 9

24 University of British Columbia Drinking Water Quality Monitoring Report 25 APPENDIX A Water Sampling Sites Site Map

25

26 University of British Columbia Drinking Water Quality Monitoring Report 25 APPENDIX B Sample Analysis Results

27 Sample Point WQB7 (UBC ) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 6 Jan 5 9 < < < UBC 3 Jan 5 4 < < UBC 2 Jan 5.5 < < < UBC 27 Jan 5 9 < < < UBC 3 Feb 5 < < UBC Feb 5 < < UBC 7 Feb 5.55 < < UBC 24 Feb 5 2 < < UBC 3 Mar 5.59 < < < UBC Mar 5 2 < < < UBC 7 Mar 5.3 < < UBC 24 Mar 5 9 < < UBC 3 Mar 5 2 < < < UBC 7 Apr 5.72 < < < UBC 4 Apr 5 < < < UBC 2 Apr 5 2 < < UBC 28 Apr 5.5 < < < UBC 5 May 5 5 < < < UBC 2 May 5.5 < < UBC 9 May 5.7 < < UBC 26 May 5 8 < < UBC 2 Jun 5.3 < < UBC 9 Jun 5 4 < < UBC 6 Jun 5 6 < < < UBC 23 Jun 5 6 < < < UBC 3 Jun 5 4 < < UBC 7 Jul 5 6 < < UBC 4 Jul 5.59 < < UBC 2 Jul 5.57 < < < UBC 28 Jul 5.58 < < < UBC 4 Aug 5 5 < < < UBC Aug 5 3 < < < UBC 8 Aug 5 7 < < < UBC 25 Aug 5 2 < < < UBC Sep 5 < < < UBC 8 Sep 5 4 < < < UBC 5 Sep 5 < < < UBC 22 Sep 5 4 < < < UBC 29 Sep 5.5 < < < UBC 6 Oct 5 2 < < UBC 3 Oct 5 9 < < < UBC 2 Oct 5 3 < < < UBC 27 Oct 5 < < < UBC 3 Nov 5 < < < UBC Nov 5 6 < < < UBC 7 Nov 5 8 < < < UBC 24 Nov 5.58 < < < UBC Dec 5.54 < < < UBC 8 Dec 5.75 < < < UBC 5 Dec 5.3 < < < UBC 22 Dec 5 3 < < NA UBC 29 Dec 5.53 < < NA Analyses by Metro Vancouver Laboratory 25

28 Temperature Degrees Turbidity NTU Conductivity us/cm 6-Jan-5 6-Feb-5 6-Mar-5 6-Apr-5 6-May-5 6-Jun-5 6-Jul-5 6-Aug-5 6-Sep-5 6-Oct-5 6-Nov-5 6-Dec-5 CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQB7- (UBC-).4.2 Free CI2 and HPC at Sample Point UBC- CI2 HPC Total and Faecal Coliforms at Sample Point UBC- Total Coliform E Coli Temperature and Turbidity at Sample Point UBC- Temperature Turbidity and Conductivity at Sample Point UBC- Conductivity

29 Sample Point WQC3 2 (UBC 2) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 2 6 Jan 5.5 < < < UBC 2 3 Jan 5.5 < < UBC 2 2 Jan 5.54 < < < UBC 2 27 Jan 5.5 < < < UBC 2 3 Feb 5 5 < < < UBC 2 Feb 5 < < UBC 2 7 Feb 5 < < UBC 2 24 Feb 5 < < < UBC 2 3 Mar 5 < < < UBC 2 Mar 5.58 < < < UBC 2 24 Mar 5.53 < < < UBC 2 3 Mar 5.5 < < UBC 2 7 Apr 5 7 < < < UBC 2 4 Apr 5.5 < < < UBC 2 2 Apr 5.56 < < UBC 2 28 Apr 5.58 < < < UBC 2 5 May 5.54 < < < UBC 2 2 May 5 3 < < UBC 2 9 May 5 7 < < < UBC 2 26 May 5.5 < < < UBC 2 2 Jun 5 2 < < UBC 2 9 Jun 5.5 < < < UBC 2 6 Jun 5 5 < < < UBC 2 23 Jun 5 < < < UBC 2 3 Jun 5.58 < < < UBC 2 7 Jul 5 3 < < < UBC 2 4 Jul 5 < < < UBC 2 2 Jul 5.58 < < UBC 2 28 Jul 5 9 < < < UBC 2 4 Aug 5 7 < < < UBC 2 Aug 5.55 < < < UBC 2 8 Aug 5 9 < < < UBC 2 25 Aug 5.5 < < < UBC 2 Sep 5 6 < < < UBC 2 8 Sep 5 < < < UBC 2 5 Sep 5.5 < < < UBC 2 22 Sep 5 8 < < < UBC 2 29 Sep 5 8 < < < UBC 2 6 Oct 5 5 < < < UBC 2 3 Oct 5.54 < < < UBC 2 2 Oct 5 5 < < < UBC 2 27 Oct 5 9 < < < UBC 2 3 Nov 5 4 < < < UBC 2 Nov 5 3 < < < UBC 2 7 Nov 5 < < < UBC 2 24 Nov 5.58 < < < UBC 2 Dec 5.52 < < < UBC 2 8 Dec 5 2 < < UBC 2 5 Dec 5. < < < UBC 2 22 Dec 5.57 < < NA UBC 2 29 Dec 5.5 < < NA Analyses by Metro Vancouver Laboratory 25

30 Temperature Degrees Turbidity NTU Conductivity us/cm CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQC3-2 (UBC-2).2 Free CI2 and HPC at Sample Point UBC-2 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-2 Total Coliform E Coli Temperature and Turbidity at Sample Point UBC-2 Temperature Turbidity and Conductivity at Sample Point UBC-2 Conductivity

31 Sample Point WQD2 3 (UBC 3) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 3 6 Jan 5.54 < < < UBC 3 3 Jan 5.58 < < UBC 3 2 Jan 5.58 < < < UBC 3 27 Jan 5.5 < < < UBC 3 3 Feb 5.53 < < UBC 3 Feb 5 2 < < UBC 3 7 Feb 5 < < UBC 3 24 Feb 5 8 < < UBC 3 3 Mar 5.58 < < < UBC 3 Mar 5.58 < < < UBC 3 7 Mar 5.53 < < UBC 3 24 Mar 5.5 < < < UBC 3 3 Mar 5.5 < < UBC 3 7 Apr 5.59 < < < UBC 3 4 Apr 5.5 < < UBC 3 2 Apr 5 8 < < < UBC 3 28 Apr 5.5 < < < UBC 3 5 May 5.52 < < < UBC 3 2 May 5 8 < < < UBC 3 9 May 5.5 < < < UBC 3 26 May 5 3 < < UBC 3 2 Jun 5 6 < UBC 3 9 Jun 5.5 < < < UBC 3 6 Jun 5 6 < < < UBC 3 23 Jun 5 < < UBC 3 3 Jun 5.54 < < < UBC 3 7 Jul 5.57 < < < UBC 3 4 Jul 5 < < < UBC 3 2 Jul 5 3 < < < UBC 3 28 Jul 5.52 < < < UBC 3 4 Aug 5 9 < < < UBC 3 Aug 5 9 < < < UBC 3 8 Aug 5 7 < < UBC 3 25 Aug 5 7 < < < UBC 3 Sep 5 4 < < < UBC 3 8 Sep 5 3 < < < UBC 3 5 Sep 5 6 < < UBC 3 22 Sep 5 9 < < < UBC 3 29 Sep 5 2 < < < UBC 3 6 Oct 5 5 < < < UBC 3 3 Oct 5.5 < < < UBC 3 2 Oct 5 5 < < < UBC 3 27 Oct 5.52 < < < UBC 3 3 Nov 5 3 < < < UBC 3 Nov 5.55 < < < UBC 3 7 Nov 5 4 < < < UBC 3 24 Nov 5.54 < < < UBC 3 Dec 5.54 < < < UBC 3 8 Dec 5 4 < < < UBC 3 5 Dec 5. < < < UBC 3 22 Dec 5.55 < < NA UBC 3 29 Dec 5 < < NA Analyses by Metro Vancouver Laboratory 25

32 Temperature Degrees Turbidity NTU Conductivity us/cm 6-Jan-5 6-Feb-5 6-Mar-5 6-Apr-5 6-May-5 6-Jun-5 6-Jul-5 6-Aug-5 6-Sep-5 6-Oct-5 6-Nov-5 6-Dec-5 CI2 Free mg/l HPC CFU/mL T Coli FM/ ml E Coli FM/ ml Sample Point WQD2-3 (UBC-3).2 Free CI2 and HPC at Sample Point UBC-3 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-3 Total Coliform E Coli Temperature and Turbidity at Sample Point UBC-3 Temperature Turbidity and Conductivity at Sample Point UBC-3 Conductivity

33 Sample Point WQH3A 4 (UBC 4) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 4 6 Jan 5 7 < < UBC 4 3 Jan 5.5 < < < UBC 4 2 Jan 5 < < UBC 4 27 Jan 5 6 < < < UBC 4 3 Feb 5.5 < < < UBC 4 Feb 5 8 < < UBC 4 7 Feb 5.52 < < < UBC 4 24 Feb 5.5 < < < UBC 4 3 Mar 5 < < < UBC 4 Mar 5 < < < UBC 4 7 Mar 5 2 < < < UBC 4 24 Mar 5 < < < UBC 4 3 Mar 5.53 < < < UBC 4 7 Apr 5 6 < < [Contamination] LA UBC 4 4 Apr 5.56 < < < UBC 4 2 Apr 5 7 < < < UBC 4 28 Apr 5.5 < < < UBC 4 5 May 5.59 < < < UBC 4 2 May 5.54 < < < UBC 4 9 May 5.57 < < UBC 4 26 May 5 8 < < < UBC 4 2 Jun < UBC 4 9 Jun 5.55 < < < UBC 4 6 Jun 5 4 < < < UBC 4 23 Jun 5 8 < < < UBC 4 3 Jun 5 4 < < < UBC 4 7 Jul 5 9 < < < UBC 4 4 Jul 5 5 < < < UBC 4 2 Jul 5.56 < < UBC 4 28 Jul 5 6 < < < UBC 4 4 Aug 5.52 < < < UBC 4 Aug 5 < < < UBC 4 8 Aug 5 2 < < < UBC 4 25 Aug 5.55 < < < UBC 4 Sep 5 4 < < < UBC 4 8 Sep 5 < < < UBC 4 5 Sep 5.59 < < < UBC 4 22 Sep 5.59 < < < UBC 4 29 Sep 5.59 < < < UBC 4 6 Oct 5.55 < < < UBC 4 3 Oct 5 4 < < < UBC 4 2 Oct 5.56 < < < UBC 4 27 Oct 5 8 < < < UBC 4 3 Nov 5.75 < < < UBC 4 Nov 5 7 < < < UBC 4 7 Nov 5.55 < < < UBC 4 24 Nov 5 3 < < < UBC 4 Dec 5 2 < < < UBC 4 8 Dec 5.72 < < < UBC 4 5 Dec 5.98 < < < UBC 4 22 Dec 5 3 < < NA UBC 4 29 Dec 5.5 < < NA Analyses by Metro Vancouver Laboratory 25

34 Temperature Degrees Turbidity NTU Conductivity us/cm 6-Jan-5 6-Feb-5 6-Mar-5 6-Apr-5 6-May-5 6-Jun-5 6-Jul-5 6-Aug-5 6-Sep-5 6-Oct-5 6-Nov-5 6-Dec-5 CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQH3A-4 (UBC-4).2 Free CI2 and HPC at Sample Point UBC-4 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-4 Total Coliform E Coli Temperature and Turbidity at Sample Point UBC-4 Temperature Turbidity and Conductivity at Sample Point UBC-4 Conductivity

35 Sample Point WQL3 6 (UBC 6) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 6 6 Jan 5.5 < < UBC 6 2 Jan 5.52 < < < UBC 6 3 Feb 5 9 < < < UBC 6 7 Feb 5 < < < UBC 6 3 Mar 5.5 < < < UBC 6 7 Mar 5 < < < UBC 6 3 Mar 5.5 < < UBC 6 4 Apr 5.54 < < UBC 6 28 Apr 5.55 < < < UBC 6 2 May 5.5 < < < UBC 6 26 May 5 7 < < < UBC 6 9 Jun 5.55 < < UBC 6 23 Jun 5.75 < < < UBC 6 7 Jul 5.74 < < < UBC 6 2 Jul 5.55 < < UBC 6 4 Aug 5.72 < < < UBC 6 8 Aug 5 5 < < UBC 6 Sep 5 4 < < < UBC 6 5 Sep 5.76 < < < UBC 6 29 Sep 5 6 < < < UBC 6 3 Oct 5.7 < < < UBC 6 27 Oct 5.76 < < < UBC 6 Nov 5 9 < < < UBC 6 24 Nov 5 4 < < < UBC 6 8 Dec 5.72 < < < UBC 6 22 Dec 5 8 < < NA Analyses by Metro Vancouver Laboratory 25

36 Temperature Degrees Turbidity NTU Conductivity us/cm 6-Jan-5 6-Feb-5 6-Mar-5 6-Apr-5 6-May-5 6-Jun-5 6-Jul-5 6-Aug-5 6-Sep-5 6-Oct-5 6-Nov-5 6-Dec-5 CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQL3-6 (UBC-6) Free CI2 and HPC at Sample Point UBC-6 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-6 Total Coliform E Coli Temperature and Turbidity at Sample Point UBC-6 Temperature Turbidity and Conductivity at Sample Point UBC-6 Conductivity

37 Sample Point WQJ5 7 (UBC 7) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 7 6 Jan 5.5 < < UBC 7 2 Jan 5 < < < UBC 7 3 Feb 5 5 < < < UBC 7 7 Feb 5.53 < < < UBC 7 3 Mar 5 3 < < < UBC 7 7 Mar 5 5 < < < UBC 7 3 Mar 5 8 < < < UBC 7 4 Apr 5.5 < < UBC 7 28 Apr 5.5 < < < UBC 7 2 May 5 7 < < < UBC 7 26 May 5 < < < UBC 7 9 Jun 5.59 < < UBC 7 23 Jun 5 9 < < < UBC 7 7 Jul 5 6 < < < UBC 7 2 Jul 5.58 < < < UBC 7 4 Aug 5.76 < < < UBC 7 8 Aug 5 8 < < < UBC 7 Sep 5.7 < < < UBC 7 5 Sep 5 9 < < < UBC 7 29 Sep 5 4 < < < UBC 7 3 Oct 5.74 < < < UBC 7 27 Oct 5.72 < < < UBC 7 Nov 5.72 < < < UBC 7 24 Nov 5 8 < < < UBC 7 8 Dec 5.73 < < < UBC 7 22 Dec 5 6 < < NA Analyses by Metro Vancouver Laboratory 25

38 Temperature Degrees Turbidity NTU Conductivity us/cm 6-Jan-5 6-Feb-5 6-Mar-5 6-Apr-5 6-May-5 6-Jun-5 6-Jul-5 6-Aug-5 6-Sep-5 6-Oct-5 6-Nov-5 6-Dec-5 CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQJ5-7 (UBC-7) Free CI2 and HPC at Sample Point UBC-7 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-7 Total Coliform E Coli Temperature and Turbidity at Sample Point UBC-7 Temperature Turbidity and Conductivity at Sample Point UBC-7 Conductivity

39 Sample Point WQG6 8 (UBC 8) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 8 6 Jan 5.57 < < UBC 8 2 Jan 5.54 < < UBC 8 3 Feb 5 5 < < UBC 8 7 Feb 5 2 < < UBC 8 3 Mar 5 < < < UBC 8 7 Mar 5.58 < < UBC 8 3 Mar 5.53 < < < UBC 8 4 Apr 5 8 < < UBC 8 28 Apr 5.56 < < < UBC 8 2 May 5.57 < < < UBC 8 26 May 5 3 < < < UBC 8 9 Jun 5 3 < < < UBC 8 23 Jun 5 < < < UBC 8 7 Jul 5 5 < < < UBC 8 2 Jul 5.59 < < < UBC 8 4 Aug 5.77 < < < UBC 8 8 Aug 5.74 < < < UBC 8 Sep 5 5 < < UBC 8 5 Sep 5 2 < < < UBC 8 29 Sep 5.5 < < < UBC 8 3 Oct 5.7 < < < UBC 8 2 Oct 5 9 < < < UBC 8 27 Oct 5 4 < < < UBC 8 Nov 5 7 < < UBC 8 7 Nov 5.55 < < < UBC 8 24 Nov 5 8 < < < UBC 8 Dec 5 < < < UBC 8 8 Dec 5.72 < < < UBC 8 5 Dec 5.95 < < < UBC 8 22 Dec 5 3 < < NA UBC 8 29 Dec 5 3 < < NA Analyses by Metro Vancouver Laboratory 25

40 Temperature Degrees Turbidity NTU Conductivity us/cm 6-Jan-5 6-Feb-5 6-Mar-5 6-Apr-5 6-May-5 6-Jun-5 6-Jul-5 6-Aug-5 6-Sep-5 6-Oct-5 6-Nov-5 6-Dec-5 CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQG6-8 (UBC-8) Free CI2 and HPC at Sample Point UBC-8 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-8 Total Coliform E Coli Temperature and Turbidity at Sample Point UBC-8 Temperature Turbidity and Conductivity at Sample Point UBC-8 Conductivity

41 Sample Point WQF73 9 (UBC 9) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 9 6 Jan 5 < < < UBC 9 3 Jan 5.55 < < < UBC 9 2 Jan 5.52 < < UBC 9 27 Jan 5.53 < < < UBC 9 3 Feb 5 9 < < < UBC 9 Feb 5 < < < UBC 9 7 Feb 5 9 < < < UBC 9 24 Feb 5 8 < < < UBC 9 3 Mar 5 9 < < UBC 9 Mar 5 3 < < < UBC 9 7 Mar 5 3 < < UBC 9 24 Mar 5 9 < < < UBC 9 3 Mar 5.58 < < < UBC 9 7 Apr 5.7 < < < UBC 9 4 Apr 5.58 < < < UBC 9 2 Apr 5 7 < < < UBC 9 28 Apr 5.56 < < < UBC 9 5 May 5.59 < < < UBC 9 2 May 5.5 < < < UBC 9 9 May 5 4 < < < UBC 9 26 May 5 5 < < UBC 9 2 Jun 5.55 < < < UBC 9 9 Jun 5.59 < < UBC 9 6 Jun 5 7 < < < UBC 9 3 Jun 5.55 < < UBC 9 7 Jul 5 6 < < < UBC 9 4 Jul 5 8 < < < UBC 9 2 Jul 5.57 < < < UBC 9 28 Jul 5.5 < < < UBC 9 4 Aug 5.72 < < < UBC 9 Aug 5.58 < < UBC 9 8 Aug 5.57 < < UBC 9 25 Aug 5 4 < < < UBC 9 Sep 5 9 < < < UBC 9 8 Sep 5.57 < < < UBC 9 5 Sep 5 8 < < < UBC 9 22 Sep 5 9 < < < UBC 9 29 Sep 5 5 < < < UBC 9 6 Oct 5 7 < < < UBC 9 3 Oct 5 9 < < < UBC 9 2 Oct 5.7 < < < UBC 9 27 Oct 5 5 < < < UBC 9 3 Nov 5.75 < < < UBC 9 Nov 5.76 < < < UBC 9 7 Nov 5.52 < < < UBC 9 24 Nov 5 < < < UBC 9 Dec 5.59 < < < UBC 9 8 Dec 5.74 < < < UBC 9 5 Dec 5.3 < < < UBC 9 22 Dec 5 7 < < NA UBC 9 29 Dec 5 6 < < NA Analyses by Metro Vancouver Laboratory 25

42 Temperature Degrees Turbidity NTU Conductivity us/cm 6-Jan-5 6-Feb-5 6-Mar-5 6-Apr-5 6-May- 6-Jun-5 6-Jul-5 6-Aug-5 6-Sep-5 6-Oct-5 6-Nov-5 6-Dec-5 CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQF73-9 (UBC-9).4.2 Free CI2 and HPC at Sample Point UBC-9 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-9 Total Coliform E Coli Temperature and Turbidity at Sample Point UBC-9 Temperature Turbidity and Conductivity at Sample Point UBC-9 Conductivity

43 Sample Point WQJ (UBC ) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 6 Jan 5.5 < < < UBC 3 Jan 5.5 < < < UBC 2 Jan 5 4 < < UBC 27 Jan 5 2 < < < UBC 3 Feb 5 4 < < < UBC Feb 5 < < < UBC 7 Feb 5.55 < < < UBC 24 Feb 5.5 < < < UBC 3 Mar 5 2 < < < UBC Mar 5.57 < < < UBC 7 Mar 5 4 < < < UBC 24 Mar 5.56 < < UBC 3 Mar 5.5 < < UBC 7 Apr 5 2 < < < UBC 4 Apr 5.52 < < UBC 2 Apr 5 < < < UBC 28 Apr 5 8 < < < UBC 5 May 5 3 < < < UBC 2 May 5.52 < < UBC 9 May 5 < < < UBC 26 May 5 < < < UBC 2 Jun 5 9 < < < UBC 9 Jun 5.56 < < < UBC 6 Jun 5.56 < < UBC 23 Jun 5.75 < < < UBC 3 Jun 5.57 < < UBC 7 Jul 5 < < UBC 4 Jul 5 < < UBC 2 Jul 5.54 < < < UBC 28 Jul 5.52 < < < UBC 4 Aug 5 < < < UBC Aug 5 < < < UBC 8 Aug 5 < < < UBC 25 Aug 5 < < < UBC Sep 5 6 < < < UBC 8 Sep 5.53 < < UBC 5 Sep 5 5 < < < UBC 22 Sep 5.56 < < < UBC 29 Sep 5 2 < < < UBC 6 Oct 5 < < < UBC 3 Oct 5 2 < < < UBC 2 Oct 5 3 < < < UBC 27 Oct 5 9 < < < UBC 3 Nov 5.73 < < < UBC Nov 5.9 < < < UBC 7 Nov 5.59 < < < UBC 24 Nov 5.73 < < < UBC Dec 5 2 < < < UBC 8 Dec 5 < < UBC 5 Dec 5.4 < < < UBC 22 Dec 5.72 < < NA UBC 29 Dec 5 5 < < NA Analyses by Metro Vancouver Laboratory 25

44 Temperature Degrees Turbidity NTU Conductivity us/cm 6-Jan-5 6-Feb-5 6-Mar-5 6-Apr-5 6-May- 6-Jun-5 6-Jul-5 6-Aug-5 6-Sep-5 6-Oct-5 6-Nov-5 6-Dec-5 CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQJ- (UBC-) Free CI2 and HPC at Sample Point UBC- CI2 HPC Total and Faecal Coliforms at Sample Point UBC- Total Coliform E Coli Temperature and Turbidity at Sample Point UBC- Temperature Turbidity and Conductivity at Sample Point UBC- Conductivity

45 Sample Point WQM8 2 (UBC 2) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 2 6 Jan 5 3 < < UBC 2 2 Jan 5.52 < < < UBC 2 3 Feb 5 2 < < < UBC 2 7 Feb 5 3 < < UBC 2 3 Mar 5.59 < < < UBC 2 7 Mar 5 < < < UBC 2 3 Mar 5 < < < UBC 2 4 Apr 5.5 < < < UBC 2 28 Apr 5.5 < < < UBC 2 2 May 5.54 < < UBC 2 26 May 5 8 < < < UBC 2 9 Jun 5.52 < < UBC 2 23 Jun 5 < < < UBC 2 7 Jul 5.7 < < < UBC 2 2 Jul 5 3 < < < UBC 2 4 Aug 5.59 < < < UBC 2 8 Aug 5 < < < UBC 2 Sep 5.7 < < < UBC 2 5 Sep 5.7 < < < UBC 2 29 Sep 5 8 < < UBC 2 3 Oct 5 4 < < < UBC 2 27 Oct 5 < < < UBC 2 Nov 5.9 < < < UBC 2 7 Nov 5 2 < < < UBC 2 24 Nov 5 4 < < < UBC 2 Dec 5 5 < < < UBC 2 8 Dec 5 < < < UBC 2 5 Dec 5.3 < < < UBC 2 22 Dec 5.76 < < NA UBC 2 29 Dec 5 8 < < NA Analyses by Metro Vancouver Laboratory 25

46 Temperature Degrees Turbidity NTU Conductivity us/cm 6-Jan-5 6-Feb-5 6-Mar-5 6-Apr-5 6-May-5 6-Jun-5 6-Jul-5 6-Aug-5 6-Sep-5 6-Oct-5 6-Nov-5 6-Dec-5 CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQM8-2 (UBC-2).4.2 Free CI2 and HPC at Sample Point UBC-2 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-2 Total coliform E Coli Temperature and Turbidity at Sample Point UBC-2 Temperature Turbidity and Conductivity at Sample Point UBC-2 Conductivity

47 Sample Point WQN9 3 (UBC 3) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 3 6 Jan 5.54 < < < UBC 3 3 Jan 5.57 < < < UBC 3 2 Jan 5.57 < < < UBC 3 27 Jan 5.54 < < < UBC 3 3 Feb 5 5 < < < UBC 3 Feb 5 < < UBC 3 7 Feb 5 6 < < < UBC 3 24 Feb 5 < < < UBC 3 3 Mar 5.59 < < < UBC 3 Mar 5 7 < < < UBC 3 7 Mar 5 8 < < < UBC 3 24 Mar 5 8 < < < UBC 3 3 Mar 5.55 < < UBC 3 7 Apr 5 6 < < < UBC 3 4 Apr 5.53 < < < UBC 3 2 Apr 5.7 < < < UBC 3 28 Apr 5.54 < < < UBC 3 5 May 5 5 < < < UBC 3 2 May 5.54 < < UBC 3 9 May 5 6 < < UBC 3 26 May 5.57 < < < UBC 3 2 Jun 5.55 < < < UBC 3 9 Jun 5.52 < < < UBC 3 6 Jun 5 4 < < < UBC 3 23 Jun 5.78 < < < UBC 3 3 Jun 5.73 < < < UBC 3 7 Jul 5 9 < < < UBC 3 4 Jul 5.7 < < < UBC 3 2 Jul 5 7 < < < UBC 3 28 Jul 5 < < < UBC 3 4 Aug 5.79 < < < UBC 3 Aug 5.77 < < < UBC 3 8 Aug 5.78 < < < UBC 3 25 Aug 5 4 < < < UBC 3 Sep 5.75 < < < UBC 3 8 Sep 5 3 < < < UBC 3 5 Sep 5 < < < UBC 3 22 Sep 5 2 < < < UBC 3 29 Sep 5 7 < < UBC 3 6 Oct 5.75 < < < UBC 3 3 Oct 5.7 < < < UBC 3 2 Oct 5.74 < < < UBC 3 27 Oct 5 8 < < < UBC 3 3 Nov 5.76 < < < UBC 3 Nov 5 2 < < < UBC 3 7 Nov 5.52 < < < UBC 3 24 Nov 5 8 < < < UBC 3 Dec 5 8 < < UBC 3 8 Dec 5.76 < < < UBC 3 5 Dec 5.79 < < < UBC 3 22 Dec 5 < < NA UBC 3 29 Dec 5 3 < < NA Analyses by Metro Vancouver Laboratory 25

48 Temperature Degrees Turbidity NTU Conductivity us/cm 6-Jan-5 6-Feb-5 6-Mar-5 6-Apr-5 6-May-5 6-Jun-5 6-Jul-5 6-Aug-5 6-Sep-5 6-Oct-5 6-Nov-5 6-Dec-5 CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQN9-3 (UBC-3) Free CI2 and HPC at Sample Station UBC-3 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-3 Total Coliform E Coli Temperature and Turbidity at Sample Point UBC-3 Temperature Turbidity and Conductivity at Sample Point UBC-3 Conductivity

49 Sample Point WQQ6 4 (UBC 4) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 4 6 Jan 5.58 < < < UBC 4 3 Jan 5.56 < < < UBC 4 2 Jan 5.5 < < < UBC 4 27 Jan 5.52 < < UBC 4 3 Feb 5.38 < < UBC 4 Feb 5 5 < < UBC 4 7 Feb 5 8 < < UBC 4 24 Feb 5.5 < < < UBC 4 3 Mar 5.55 < < < UBC 4 Mar 5.53 < < < UBC 4 7 Mar 5.58 < < < UBC 4 24 Mar 5.57 < < < UBC 4 3 Mar 5.5 < < UBC 4 7 Apr 5.55 < < < UBC 4 4 Apr 5.5 < < < UBC 4 2 Apr 5 6 < < UBC 4 28 Apr 5.52 < < < UBC 4 5 May 5.5 < < < UBC 4 2 May 5 4 < < < UBC 4 9 May 5 6 < < UBC 4 26 May 5.5 < < UBC 4 2 Jun 5 8 < < UBC 4 9 Jun 5.57 < < UBC 4 6 Jun 5 9 < < < UBC 4 23 Jun 5 8 < < < UBC 4 3 Jun 5 9 < < < UBC 4 7 Jul 5 6 < < < UBC 4 4 Jul 5 7 < < < UBC 4 2 Jul 5 6 < < UBC 4 28 Jul 5.5 < < < UBC 4 4 Aug 5.59 < < < UBC 4 Aug 5 8 < < UBC 4 8 Aug 5 3 < < UBC 4 25 Aug 5 3 < < < UBC 4 Sep 5.52 < < < UBC 4 8 Sep 5 8 < < < UBC 4 5 Sep 5.56 < < < UBC 4 22 Sep 5.56 < < < UBC 4 29 Sep 5.59 < < < UBC 4 6 Oct 5 4 < < < UBC 4 3 Oct 5.7 < < < UBC 4 2 Oct 5 4 < < < UBC 4 27 Oct 5 2 < < < UBC 4 3 Nov 5.76 < < < UBC 4 Nov 5.9 < < < UBC 4 7 Nov 5 2 < < < UBC 4 24 Nov 5 2 < < < UBC 4 Dec 5 4 < < < UBC 4 8 Dec 5 2 < < < UBC 4 5 Dec 5.2 < < < Analyses by Metro Vancouver Laboratory 25

50 Temperature Degrees Turbidity NTU Conductivity us/cm 6-Jan-5 6-Feb-5 6-Mar-5 6-Apr-5 6-May-5 6-Jun-5 6-Jul-5 6-Aug-5 6-Sep-5 6-Oct-5 6-Nov-5 6-Dec-5 CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQQ6-4 (UBC-4).4.2 Free CI2 and HPC at Sample Point UBC-4 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-4.2 Total Coliform E Coli Temperature and Turbidity at Sample Point UBC-4 Temperature Turbidity and Conductivity at Sample Point UBC-4 Conductivity

51 Sample Point WQQ7 5 (UBC 5) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 5 6 Jan 5.5 < < UBC 5 3 Jan 5.5 < < UBC 5 2 Jan 5.55 < < < UBC 5 27 Jan 5 7 < < UBC 5 3 Feb 5 3 < < < UBC 5 Feb 5.5 < < UBC 5 7 Feb 5.53 < < < UBC 5 24 Feb 5 2 < < < UBC 5 3 Mar 5 6 < < < UBC 5 Mar 5.57 < < < UBC 5 7 Mar 5 4 < < < UBC 5 24 Mar 5 2 < < < UBC 5 3 Mar 5.5 < < < UBC 5 7 Apr 5.58 < < UBC 5 4 Apr 5.54 < < < UBC 5 2 Apr 5.7 < < < UBC 5 28 Apr 5.52 < < UBC 5 5 May 5 3 < < UBC 5 2 May 5 2 < < UBC 5 9 May 5 4 < < UBC 5 26 May 5.53 < < < UBC 5 2 Jun 5.53 < < UBC 5 9 Jun 5 8 < < UBC 5 6 Jun 5 2 < < UBC 5 23 Jun 5 3 < < < UBC 5 3 Jun 5.74 < < UBC 5 7 Jul 5 7 < < < UBC 5 4 Jul 5.73 < < UBC 5 2 Jul 5 8 < < UBC 5 28 Jul 5 < < < UBC 5 4 Aug 5.75 < < < UBC 5 Aug 5.7 < < < UBC 5 8 Aug 5.7 < UBC 5 25 Aug 5.78 < < < UBC 5 Sep 5 5 < < < UBC 5 8 Sep 5 8 < < UBC 5 5 Sep 5 5 < < < UBC 5 22 Sep 5.55 < < < UBC 5 29 Sep 5 2 < < < UBC 5 6 Oct 5 8 < < UBC 5 3 Oct 5.73 < < UBC 5 2 Oct 5.74 < < UBC 5 27 Oct 5 7 < < UBC 5 3 Nov 5.77 < < UBC 5 Nov 5 2 < < UBC 5 7 Nov 5.58 < < UBC 5 24 Nov 5 2 < < UBC 5 Dec 5 8 < < < UBC 5 8 Dec 5.7 < < < UBC 5 5 Dec 5 8 < < UBC 5 22 Dec 5.7 < < NA UBC 5 29 Dec 5.59 < < NA Analyses by Metro Vancouver Laboratory 25

52 Temperature Degrees Turbidity NTU Conductivity us/cm CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQQ7-5 (UBC-5) Free CI2 and HPC at Sample Point UBC-5 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-5 Total Coliforms E Coli Temperature and Turbidity at Sample Station UBC-5 Temperature Turbidity and Conductivity at Sample Point UBC-5 Conductivity

53 Sample Point WQT7 6 (UBC 6) Sampling Sampled Chlorine Free Total Coliform Total Coliform Ecoli E Coli HPC Temperature Turbidity Conductivity point date mg/l MF/ mls MPN/ ml MF/mLs MPN/ ml CFU/mls C NTU us/cm UBC 6 3 Jan 5 8 < < UBC 6 27 Jan 5.5 < < UBC 6 Feb 5 2 < < UBC 6 24 Feb 5 7 < < < UBC 6 Mar 5.55 < < < UBC 6 24 Mar 5 9 < < < UBC 6 7 Apr 5 9 < < UBC 6 2 Apr 5 2 < < UBC 6 5 May 5 < < < UBC 6 9 May 5 6 < < UBC 6 2 Jun 5 3 < < UBC 6 6 Jun 5 4 < < < UBC 6 3 Jun 5.53 < < < UBC 6 4 Jul 5 3 < < < UBC 6 28 Jul 5 8 < < UBC 6 Aug 5.72 < < UBC 6 25 Aug 5 4 < < < UBC 6 8 Sep 5.7 < < < UBC 6 22 Sep 5.56 < < < UBC 6 6 Oct 5.54 < < < UBC 6 2 Oct 5 7 < < < UBC 6 3 Nov 5 6 < < UBC 6 7 Nov 5.56 < < < UBC 6 Dec 5 2 < < < UBC 6 5 Dec 5. < < < UBC 6 29 Dec 5.55 < < NA Analyses by Metro Vancouver Laboratory 25

54 Temperature Degrees Turbidity NTU Conductivity us/cm CI2 Free mg/l HPC CFU/mL T Coli MF/ ml E Coli MF/ ml Sample Point WQT7-6 (UBC-6).2 Free CI2 and HPC at Sample Station UBC-6 CI2 HPC Total and Faecal Coliforms at Sample Point UBC-6 Total Coliforms E Coli Temperature and Turbidity at Sample Point UBC-6 Temperature Turbidity and Conductivity at Sample Point UBC-6 Conductivity

55 University of British Columbia Drinking Water Quality Monitoring Report 25 APPENDIX C Metro Vancouver and Municipal Response Procedure

56 Metro Vancouver and Municipal Response Procedures Action will be initiated by LCOC control room operator based on information received through the SCADA system or from field staff Control room will immediately notify: Utility Systems Control Superintendent (or designate) Developing Situation High alarm limits reached at river or at in-lake buoys. A B Imminent Situation intake. Control room will immediately notify: Utility Systems Control Superintendent (or designate) Utility Systems Control Superintendent (or designate) Utility Systems Control Superintendent (or designate) Monitor situation and evaluate potential impacts. Notify the following Division Managers (or designates) as required: Quality Control, Utility Systems Operations, Water Treatment Operations and Watershed Management. Immediate Actions: Notify Utility System Operations, Water Treatment Operations and Quality Control Division Managers (or designates.) Minimize flow from affected source and consider the need to isolate the source. Priority Notification (immediately following steps above): Operations staff of affected municipalities. Superintendent of Utility Systems Operations (or designate) Water Treatment Operations Division Manager (or designate) Watershed Management Division Manager (or designate) Superintendent of Utility Systems Operations (or designate) Water Treatment Operations Division Manager (or designate) Quality Control Division Manager (or designate) Watershed Management Division Manager (or designate) Prepare operations field crews to isolate source if necessary. Situation ends (readings fall, no evidence of slides, etc.). Increase chlorine residual up to a level as high as.5 mg/l, if possible, at both primary and secondary disinfection stations. Increase ozone CT at Coquitlam if possible. Notify affected municipalities of treatment changes. Superintendent (or designate) Investigate cause of the turbidity event. Advise Utility Systems Control Superintendent (or designate) as required. Situation escalates (confirmation of rising turbidity readings, visual confirmation of slides etc.). Isolate source (as directed) with the assistance of Water Treatment. Make further adjustments to water treatment as required taking changes made under A into account. Confirm treatment changes with Quality Control. Prepare to assist with isolating source. GVRD Communications If Required: Notify: Board Chair, Water Committee Chair and Board members of affected municipalities. For extraordinary turbidity events, notify public by issuing press release. *UBC Emergency Response Procedure Scenarios W4 & W6 Evaluate and monitor situation - collect water quality information as required. Notify: Metro Vancouver MHO (or delegate) and other DWOs (or DWO delegates) for extraordinary turbidity events. Notify: Metro Vancouver Communications, O&M Department Manager, Commissioner and Water Quality Contacts of affected municipalities. Investigate cause of the turbidity event. Advise Manager of Utility Systems Operations and the Quality Control Division Manager (or designates) of findings. Municipalities* Increase Cl2 residual at existing municipal secondary disinfection stations by up to.5 mg/l above usual treatment levels, if possible. For extraordinary turbidity events, notify local public health contacts. Updated October 27

57 University of British Columbia Drinking Water Quality Monitoring Report 25 APPENDIX D Source Water Quality Summary Tables for Capilano, Seymour and Coquitlam Reservoirs

58

59

60