Whitevale Water Utility Annual Report

Transcription

1 Whitevale Water Utility Annual Report Regional District of North Okanagan Prepared for: Interior Health & RDNO 9848 Aberdeen Road Prepared by: Zee Marcolin, P.Eng., Utility Engineer Coldstream, BC Contributor: Keiko Parker, Environmental Technician V1B 2K9 February 6, 2013

2 TABLE OF CONTENTS 1. INTRODUCTION BACKGROUND WATER SYSTEM OVERVIEW IH INSPECTION REPORT Long-Term Requirements Source Protection Plan (Condition 1) Reservoir Condition/Circulation (Condition 2) Flushing Program (Condition 3) Water Quality Monitoring Program (Condition 4) Laboratory Samples Microbial and other Parameters Chorine Monitoring Contact Time Water Quality Incidents for 2011 and Monthly Reports (Condition 5) Cross Connection Control Program (Condition 6) Deficiencies Outlined in the IH Inspection Report Emergency Response Plan Suction Line Well Assessment Sampling Requirements WORKS COMPLETED IN 2011 AND UTILITY CHALLENGES AND 2013 WORK PLAN CLOSING... 9

3 APPENDICES APPENDIX A IH Water Supply System Report for the Whitevale Utilities. Bryn Lord. August 4, Report Number: APPENDIX B Whitevale Water Utility System Overview APPENDIX C Report - Golder Associates Ltd. May Preliminary Steps in the Development of a Groundwater Protection Plan, Whitevale, BC. Prepared for RDNO. APPENDIX D Letter Report - Sustainable Subsurface Solutions. June 22, 2010.Well Closure Report for BCWTN 75652, in the Whitevale Subdivision, Near Lumby, BC. Prepared for RDNO. APPENDIX E Kerr Wood Leidal. November 20, Design Drawing for Circulation Improvements for the WVW Reservoir. APPENDIX F IH Construction Permit No. CP for Reservoir at 715 Franklyn Road. APPENDIX G Figure WVW water system and reservoir (updated to include circulation improvement works) APPENDIX H 2012 and 2013 WVW Sampling Program and Schedules APPENDIX I APPENDIX J Summary of Chlorine Residuals and Microbial Sampling Summary of Historic Raw Water Comprehensive Sampling for the Whitevale Well (Well 2) APPENDIX K Whitevale Water Contact Time Calculation ACRYONYMS AWWA BCAWQ CDWQ CT DWPR IH RDNO WVW American Water Works Association British Columbia Approved Water Quality Guidelines Canadian Drinking Water Quality Chlorine contact time Drinking Water Protection Regulation Interior Health Regional District of North Okanagan Whitevale Water Utility

4 1. INTRODUCTION RDNO is pleased to present the Annual Water Quality Report for the Whitevale Water Utility (WVW), providing information about regarding the water quality and status of this system. This report summarizes the operations and water quality results for the WVW for the years 2011 and 2012, as required by the British Columbia Drinking Water Protection Act. The report format provides responses to requirements and deficits outlined in the Interior Health (IH) Inspection Report dated August 4, 2010 completed for the WVW provided in Appendix A. 2. BACKGROUND The WVW system was constructed in the mid 1970s and was operated as a private utility until 2004 when it became a function of the Regional District of North Okanagan (RDNO). The RDNO Utilities Engineer is responsible for the operation and management with oversight provided by the General Manager of Engineering and the RDNO Board of Directors. RDNO employs a contract operator to complete day to day operation and maintenance tasks, who is also required by contract to respond 24/7 to emergencies or to have a back up available to respond. 3. WATER SYSTEM OVERVIEW The WVW system has 92 residential connections and 1 institutional connection. There are no large scale industrial or irrigation customers on this system. The Water System fully within the community of Whitevale and is comprised of the following: One groundwater supply well housed within the well house at 715 Franklyn Road, One 200 m 3 (45,000 igal) in-ground concrete reservoir at 715 Franklyn Road, and The distribution system which is pressurized with two distribution pumps located in the pump house at 715 Franklyn Road. Water is chlorinated at the well source before entering the reservoir. There is no backup power at the pump house or well site and a power outage at the pump house causes disruption in water service. Appendix B provides an overview map of the WVW System. 1

5 4. IH WATER SUPPLY SYSTEM REPORT No The following sections outline compliance or actions taken for requirements and deficiencies identified in the IH inspection report completed by Bryn Lord of IH on August 4, 2010 (Appendix A) for the WVW System Long-Term Requirements Source Protection Plan (Condition 1) Golder Associates Ltd. completed Preliminary Steps in the Development of a Groundwater Protection Plan, Whitevale, BC issued in May 2008 (Appendix C). The new Whitevale Well installed in the summer of 2006 was classified as a confined aquifer and was constructed to BC Groundwater Protection Regulation standards with the surface annular seal extending into the confining aquifer. The highest risk identified to the new Whitevale Well was the old Whitevale Well, which was subsequently closed in June of 2010 (Appendix D) Reservoir Condition/Circulation (Condition 2) The intake and outflow pipes of the WVW reservoir were side by side near the reservoir hatch and both close to the reservoir bottom. A Community Works Grant was received in spring of 2012 to complete reservoir circulation improvements and the work was schedule to be completed in the spring of Due to a failed suction line, emergency works were required in November and December of 2012 and since the reservoir was required to be emptied, the circulation work and reservoir cleaning was also completed at that time. The following provides a brief outline of the works completed from: 1. November 20, 2013: Kerr Wood Leidal Ltd. was retained to provide a recommended method to improve circulation and provide design drawings (Appendix E). 2. November 22, 2012: A construction permit was obtained by Interior Health (Appendix F). 3. Work was initiated in November-December 2012 that included: a. Precautionary Water Quality and Notification to residents (Nov. 22, 2012) b. Emptying the reservoir, c. Installing new suction line through links seal (emergency works), d. Removing old suction pipe and installing blind flange on connection to pump house, e. Installing a new access ladder inside reservoir, f. Sealing cracks discovered in the reservoir that showed evidence of leaking, g. Installing a new pipe for the reservoir circulation project (minor adjustments to the design were required due to smaller intake pipe than originally specified), h. Cleaning and chlorinating the reservoir in accordance with American Water Works Association (AWWA) C Reservoir Chlorination Method 2, i. Filling the reservoir, chlorinating the new suction line and completing microbial sampling on the reservoir and suction line, 2

6 j. Resume use of reservoir once microbial samples indicated absence of Total Coliform and E.coli., and k. Rescind of Water Quality Advisory (Dec. 7, 2012) A drawing of the final WVW reservoir configuration piping is provided as an attachment (Appendix G) and the following pictures show the piping installed within the reservoir: Photos North and south end of WVW reservoir pipe works for circulation improvements Flushing Program (Condition 3) Annual flushing and hydrant maintenance is undertaken by Teale s Water Utility Service of Vernon. Records of the Hydrant Maintenance are kept on record. There were two dead-ends on the system and blow offs were installed and are flushed quarterly or more frequently if required by the system operator as a regular maintenance items. These blow offs are located at: Fraser Road Eastwood Road (this is considered a dead-end as the school was closed in 2010) Water Quality Monitoring Program (Condition 4) The goal of the water quality program at WVW is to prevent pathogenic microorganism contamination and control the presence of other non pathogenic microorganisms common to distribution systems. This is completed by chlorinating the raw water to provide a residual minimum goal of 0.2 mg/l free chlorine at the ends of the distribution lines ( last customer ) and routine monitoring for microbial parameters and residual chlorine. The following sections provide information about the microbial and chlorine monitoring programs, Contact Time of the system during normal operations and a summary water quality incidents that occurred in 2011 and 2012:, 3

7 Laboratory Samples Microbial and other Parameters The water quality monitoring for WVW is based on the requirements of the Drinking Water Protection Regulation (DWPR) Schedules A and B, the Guidelines for Canadian Drinking Water Quality (CDWQ) and British Columbia Approved Water Quality Guidelines (BCAWQ). The Water Sampling Program for WVW was reviewed in February of 2012 and the Sampling Program and Schedules for 2012 and 2013 are provided in Appendix H. The sampling locations are provided in the WVW system overview figure (Appendix B). The microbial sampling frequency is 4 samples a month of the treated water as required in the DWPR for populations less 5,000. One monthly raw water sample is also collected directly from the well. The WVW system has a good microbial history and the well is within a confined aquifer with an annular seal installed into the confining layer. With the exception of one sampling period a year, the system operator collects bacterial samples and drops the samples at the Interior Health Office for shipment to Caro Analytical Services. The results are sent to IH and RDNO and uploaded to WaterTrax, a third party online database that RDNO utilizes to store lab data for all RDNO water utilities. WaterTrax sends automatic alerts to RDNO water quality staff and the Utilities Engineer for any results that are out of compliance with standards. Once per year a RDNO water quality technician completes the bimonthly sampling and includes THM and comprehensive sampling of the raw water. Summaries of the microbial sampling for 2011 and 2012 are provided in Appendix I, the responses to positives are outlined in the section below. A summary of the historic raw water comprehensive samples taken from the Whitevale Well is provided in Appendix J Chorine Monitoring As the WVW is sourced from a confined aquifer, all the water quality parameters of the raw water are fairly consistent with low variation and the chlorine demand is consistent. Under normal operations, the target injection chlorine dosing concentration is 0.9 mg/l, which provides a free chlorine residual at the first customer (sampling point just past the reservoir in the pump house) within a range of 0.40 to 0.80 mg/l. An on-line chlorine analyser monitors the chlorine at the first customer and is alarmed to call out if the chlorine drops below 0.3 ppm for more than 2 minutes. Total and free chlorine is also monitored with a hand held chlorine meter at the pump house and two distribution sites whenever the operator visits the site, which is a minimum of 3 times per week. Historically the operator recorded the residual readings on an operator log sheet and was instructed to contact RDNO if readings were below 0.2 ppm. Residual chlorine readings are also recorded on the microbial samples submitted and entered into WaterTrax. As of January 2013, the operator will enter the manual chlorine readings in an Excel logbook and trending can be examined. 4

8 Chlorine Contact Time The WVW source is from a well drawing from a confined aquifer that is built according to the Groundwater Protection Regulation standards with an annular seal constructed into the confining layer. As such, chlorine contact time (CT) is not necessarily an inherent requirement for this system as per discussion with IH. Nonetheless, under peak operating conditions, CT is achieved through the reservoir to achieve 4-log virus reduction under peak operating conditions, which is calculated assuming the well pump is continuously on (Appendix K contact time calculation sheet). The CT calculation during peak operation is a minimum of 18 min-mg/l, meeting the CT for 4-log virus reduction of 8 min-mg/l for temperatures between 5 and 10 C Water Quality Incidents for 2011 and 2012 There were two water quality incidents in 2011 and two incidents in The following provides a summary of each incident: 1. On January 28, 2011 a WaterTrax notification indicated Total Coliforms was > 1 mg/100 ml at the 792 Eastwood Sampling Site. The operator was sent to the site to flush and resample and the subsequent sample was < 1 mg/100 ml. 2. On September 9, 2011 a WaterTrax notification indicated Total Coliforms was > 1 mg/100 ml at the 792 Eastwood Sampling Site. The operator was sent to the site to flush and resample and the subsequent sample was < 1 mg/100 ml. The Sampler at 792 Eastwood was installed in May 2011 and as there had been two positives in 1 year for this site and it was suspected that the result was due to the school closure and a resultant low flow occurring between the corner of Arbutus and Eastwood to the school. A blow off was installed at the fence line to implement flushing as required. Photo Earwig in Sample Line Another possibly examined was that the sampler required more flushing before sampling and the Water Quality Technician was instructed to flush the sampler for a long time (i.e. 30 minutes or more) before sampling to fully flush the line. On October 4, 2011, the Water Quality Technician proceeded to flush the sampler line while sampling the other sites. When she returned to sample the Eastwood station, a dead earwig was protruding from the sampling line (see photo to left). It is suspected the earwig was lodged in the sample line since being installed, being the most probable cause of the high positives. 5

9 3. On July 10, 2012 a WaterTrax notification indicated Total Coliforms was > 1 mg/100 ml at the 792 Eastwood sampling site. The operator was sent to the site to flush and resample and the subsequent sample was < 1 mg/100 ml. Based on positives occurring at a frequency of approximately 8 to 10 months at the Eastwood sampling site, the next thought was that the dead-end at Eastwood required more frequent flushing and quarterly flushing of the blow offs on Eastwood and Fraser was implemented as a regular maintenance duty for the operator. A review of sampling technique also revealed that one of the Water Quality Technicians was sampling from the copper tube of the sampler as opposed to the tap which may have contributed to the positive Total Coliform counts. Incident tracking will continue and if positives continue at this station, duplicate sampling at 775 Eastwood will be initiated to examine if the sampler could have a problem or confirm there is an issue with the dead end. Also in consideration will be biannual hydrant flushing to ensure adequate flows at this station during flushing. 4. On November 19, 2012 the WVW distribution pumps lost prime and could not supply water to the community. The reservoir bypass was started and chlorine dosing to the system was increased. A precautionary Water Quality Advisory was issued on November 21, 2012 during emergency works being undertaken and letters of explanation were delivered doorto-door to provide information about the incident. An Advisory Rescind Notice was issued on December 7, 2012 when the works were completed. Numerous samples were taken and analyzed from the distribution sampling sites and on the reservoir and pipe work before being brought on-line, all samples were < 1 mg/100 ml Monthly Reports (Condition 5) Summary reports of the microbial sampling and chlorine residual results are submitted to Interior Health monthly. This program was initiated in January Cross Connection Control Program (Condition 6) The RDNO hired a full time Demand Side Management / Cross Connection Control Coordinator (now titled Water Sustainability Coordinator) in 2011 and a part-time Cross Connection Control Officer in early These staff members have been directed to develop a Cross Connection Control Program (CCCP) for all water utilities owned by RDNO, including the WVW. As there is a backlog for testing of existing Backflow Prevention Devises (BFD) and identifying high and medium risk sites, CCCP staff have been primarily focused on updating the CCCP database, increasing annual testing compliance and identifying the high and medium backflow risks. Currently all connections in Whitevale are residential with the exception of the school, which is currently closed. If the school is reopened or another use is proposed, the backflow requirements will be assessed. Also, the Water Sustainability Coordinator will develop a backflow information sheet for residential uses which will be included in the Whitevale bills in

10 4.2. Deficiencies Outlined in the IH Inspection Report The following sections address the deficiencies outlined in the IH Inspection Report listed in the Observations and Recommendations section Emergency Response Plan A comprehensive update of the WVW Emergency Response Plan (ERP) was completed in The ERP was finalized on June 13, Sampling Training and RDNO small utility ERP training for the Operators occurred on December 11, Suction Line The purpose of a suction line in the pump house to the reservoir was questioned in the inspection report. An inspection of the suction line determined that it was not connect to the water system and both ends of the pipe were bagged. The purpose of the suction line is unknown Well Assessment The Groundwater Protection Plan was completed by Golder is provided in Appendix B Sampling Requirements Four (4) bacteriological samples are collected and analyzed monthly, see Section for full details on the Sampling Program for Whitevale. 7

11 5. WORKS COMPLETED IN 2011 AND 2012 Initiatives and works completed on the WVW system in 2011 and 2012 include: January 2011 Incident Tracking System for RDNO small utilities implemented, May 2011 two oasis sampling stations were installed to improve water quality sampling (Funded by a Community Works Fund (CWF) grant), May 2011 completion of a hydraulic model for the WVW system (Funded by a CWF grant), May 2011 hydrant maintenance and distribution flushing, May 2011 well pump removed for servicing and a sampling port installed with a water level transducer to measure water level response in the well (Funded by a CWF grant), June 2011 installation of an autodialer to call out alarms from SCADA (Funded by a CWF grant), September 2011 Blow off installed on Eastwood at fence line with school, September 2011 initiation of comprehensive Emergency Response Plan (ERP) update for all RNDO engineering functions including WVW (finalized in October 2012), October Deviation response checklist and ERP contact list for operators completed as part of ERP and provided to operators, October 2011 Prepared Water Quality Signs produced for Water Quality Advisories, Boil Water Notices, Flushing and Rescind Notices for road signs and signs to post in neighbourhood, October a sensitive customer list was implemented where WVW customers register to be notified of water quality issues via their choice of fax, or phone, May 2012 diaphragm chlorine pumps were replaced with more reliable peristaltic chlorine pumps, Sept new computer installed, alarms assessed and SCADA upgraded to include bypass parameters and pump alarms November 2012 distribution flushing, November 2012 emergency works included replacing suction line from reservoir to distribution pumps and installing a new foot valve, November 2012 reservoir circulation improvement project completed (Funded by a CWF grant), and November 2012 reservoir was cleaned, cracks were sealed and a new ladder installed. 8

12 6. UTILITY CHALLENGES AND 2013 WORK PLAN WVW is a small water utility that is static with no foreseeable growth. The repair to the suction line is considered temporary and the long term plan in 2013 will examine renewal of the pipe works in pump house and a permanent repair to install an underground suction line to the reservoir. Other planned works for 2013 include: Servicing of distribution pumps and PRV, Annual hydrant maintenance and flushing, Staff training of ERPs, and On-line Excel logbook for operator information data entry. 7. CLOSING The program objectives for the six water utilities owned and operated by the RDNO are to: Provide Clean, Safe drinking water Reliable delivery In Quantities to meet current and future demand Continuity of service Water Quality Advisories only a rare event RDNO has made significant strides in fulfilling the RDNO program objects, the requirements and deficiencies outlined of the IH Inspection and in implementing BC s Drinking Water Protection Act and Regulations at WVW. RDNO will strive for implementation of system improvements through the seeking of grant funding and within the constraints of the WVW budget. Any inquiries about this report or requests for more information about the WVW should be directed to RDNO at or ed to info@rdno.ca. 9

13 APPENDIX A IH Water Supply System Report for the Whitevale Utilities. Bryn Lord. August 4, Report Number:

14 Interior Health Authority 1340, Ellis Street Kelowna, BC V1Y 9N1 Phone Number: (250) Fax Number: (250) WATER SUPPLY SYSTEM REPORT Facility Information: Whitevale Utilities North Okanagan Regional District 9848 Aberdeen Road Coldstream, BC V1B 2K9 Facility Number: Report Number: Inspection Date: August 4, 2010 Contact Name: North Okanagan Regional District Community: Coldstream Site Phone: (250) Permit Number: Facility Category: Inspection Type: Action(s) Taken: Next Routine Date: Delivery Method: Water System Connections, Government Routine: General Information Exchanged August 3, 2012 Electronic Mail Opening Comments and Observations: - Site meeting with Rod Pleasance, Warren Mckim (Operator) & Christina Yamada (PHE). - System consists of a well source (27.7m depth) possibly within a partial confined aquitard (no wellhead assessment/protection plan report on record); approx. 95 connections; chlorine injection at well head with continuous online monitoring of cl residuals (0.78ppm at time of inspection) & flow rate; certified operator to system classificaiton (Warren McKim EOCP WT-II & WD-II); water distribution map available and provided for IH file; annual flushing program in place (not currently engineered/unidirectional flushing); 1 bacteriological sample collected monthly rotated between 2 sites (808 Fraser Rd & 775 Eastwood Rd); free chlorine residuals also verified weekly within distribution system at (808 Fraser Rd & 775 Eastwood Rd); - Audit chemical (wellhead) and bact. (808 Fraser Rd) samples collected at site visit - results satisfactory. - Long-term Plans for system improvements in the future should include: 1.) Initiate a Wellhead Assessment/Protection Plan utilizing the framework and guidelines outlined within the BC Well Protection Toolkit, the Groundwater Bylaws Toolkit & the BC Comprehensive DW Source to Tap Assessment Guideline. 2.) Determine reservoir condition/circulation (inlet & outlet locations) and reservoir cleaning procedures and frequency. 3.) Development of an Engineered Flushing Program - indications in past about sediment build-up in distribution system and customer complaint. 4.) Formalize a Water Quality Monitoring program with established locations and schedules for bacteriological (representative of entire distribution, including end-points) & chemical sampling (including THM's, etc). 5.) Monthly reports including SCADA summary information, cl residual checks, bacteriological/chemical sample results, comments on source, treatment and distribution events, system maintenance & complaints 6.) Initiation of a Cross-Connection Control Program (mostly residential connections), including education initiatives. Observations and Recommendations Operational: Inadequate Emergency Response Plan / Implementation 1 New: 1 / Resolved: 0 Target Completion Date: July 31, Emergency Response Plan has not been updated to include additional hazards / revised contact lists / etc. Outstanding Emergency Response Plan is require by October 31, 2010 for review and assurance that operator is adversed on required procedures in the event of an Emergency Situation. Also include a list of Contact phone numbers and draft copies of public notification for ease of reference. Operational: Other 2 New: 1 / Resolved: 0 Target Completion Date: July 31, Any other inadequate condition Confirm rational for white suction line which dead-ends in pumproom and was installed a year or two ago. Provide plan to Christina Yamada (PHE) for review and approval where required or remove by October 01, New: 1 / Resolved: 0 Target Completion Date: March 31, Any other inadequate condition Confirm funding and timelines for initiation and completion of a Well Assessment/Protection Plan by March 31, ( ) Page 1 of 2

15 Whitevale Utilities Facility Contact: Community: Report Date: North Okanagan Regional District NO Coldstream August 4, 2010 Observations and Recommendations 4 New: 0 / Resolved: 0 Target Completion Date: October 1, 2010 Please collect a minimum of 2 bacteriological samples per month starting October 1, I have read and understood this report Inspector North Okanagan Regional District 144 Bryn Lord, Environmental Health Officer ( ) Page 2 of 2

16 APPENDIX B Whitevale Water Utility System Overview

17

18 APPENDIX C Report - Golder Associates Ltd. May Preliminary Steps in the Development of a Groundwater Protection Plan, Whitevale, BC. Prepared for RDNO.

19 The following report is provided as a stand alone pdf document in the Whitevale Water Utility Annual Repor pdf version: Golder Associates Ltd. May Preliminary Steps in the Development of a Groundwater Protection Plan, Whitevale, BC. Prepared for RDNO.

20 APPENDIX D Letter Report - Sustainable Subsurface Solutions. June 22, 2010.Well Closure Report for BCWTN 75652, in the Whitevale Subdivision, Near Lumby, BC. Prepared for RDNO.

21 The following report is provided as a stand alone pdf document in the Whitevale Water Utility Annual Repor pdf version: Sustainable Subsurface Solutions. June 22, 2010.Well Closure Report for BCWTN 75652, in the Whitevale Subdivision, Near Lumby, BC. Prepared for RDNO.

22 APPENDIX E Kerr Wood Leidal. November 20, Design Drawing for Circulation Improvements for the WVW Reservoir.

23

24 APPENDIX F IH Construction Permit No. CP for Reservoir at 715 Franklyn Road.

25

26

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28 APPENDIX G Figure WVW water system and reservoir (updated to include circulation improvement works)

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30 APPENDIX H 2012 and 2013 WVW Sampling Program and Schedules

31 WHITEVALE Sampling Program Operator Tasks Pick up bacterial bottles Sampling Chlorine Turbidity bacterial bottles Requisition Sheets Bottle Drop off At Vernon Health Unit Sampling will occur on the second and fourth weeks of the month (exception: December due to Christmas) at distribution sites use handheld meter and log data at distribution sites and the well use handheld meter and log data on bottles: date, time, site name, WaterTrax number, sent by Interior Health, at distirubtion sites: take 1 - Interior Health bacterial bottle at the well take 1 Interior Health bacterial bottle Fill out requisition Sheets for all sites and send with bottles At Vernon Health Unit Monday Tuesday or Wednesday Samples dropped off in the afternoon as the courier goes out the next morning Microbiolocal samples: must be at the Caro lab within 24 hours or they cannot be processed Ice packs in coolers to keep samples at 4 degrees C samples cannot be frozen Whitevale Sample Sites WaterTrax ID# Whitevale Well 137BA 717B 792 Eastwood Road SS Fraser Road SS 1EB94 Interior Health Unit Information th Avenue Vernon, BC open 8:00 am - 4:30 pm Water Sample drop off: Monday Tuesday or Wednesday in the afternoon GVW Samping July 31, 2012 Distribution Sampling Well Water Sampling (Yearly analysis) Calibration of online and handheld instruments Sampling Schedule: Whitevale Revision Date: Feb. 13, 2012 Completed by: CK

32 WHITEVALE Sample week of: Sites Sample week of: Sites February March March April 9-13 April May 7-11 May June June July 9-13 July 31, Fraser Road SS Whitevale Well 792 Eastwood Road SS 808 Fraser Road SS Whitevale Well 792 Eastwood Road SS 808 Fraser Road SS Whitevale Well 792 Eastwood Road SS 808 Fraser Road SS Whitevale Well 792 Eastwood Road SS 808 Fraser Road SS Whitevale sampling (Monday Tuesday or Wednesday) Whitevale Well 792 Eastwood Road SS GVW will sample August August September September October 8-12 October November November December December Whitevale Well 792 Eastwood Road SS 808 Fraser Road SS Whitevale Well 792 Eastwood Road SS 808 Fraser Road SS Whitevale Well 792 Eastwood Road SS 808 Fraser Road SS Whitevale Well 792 Eastwood Road SS 808 Fraser Road SS Whitevale Well 792 Eastwood Road SS 808 Fraser Road SS Sampling Schedule: Whitevale Revision Date: Feb. 13, 2012 Completed by: CK

33 Whitevale Water Utility Sampling Program and Schedule Whitevale Sampling Schedule 2013 January Operator 2nd & 4th week of the month February Operator 2nd & 4th week of the month March Operator 2nd & 4th week of the month April Operator 2nd & 4th week of the month May Operator 2nd & 4th week of the month June Operator 2nd & 4th week of the month July GVW 2nd week, GVW, & 4th week, Operator, of the month August Operator 2nd & 4th week of the month September Operator 2nd & 4th week of the month October Operator 2nd & 4th week of the month November Operator 2nd & 4th week of the month December Operator 2nd & 4th week of the month Bottle Pick up Sampling Chlorine Bacterial Bottle Information Requisition Sheets Bottle Drop off Operator Tasks At Vernon Health Unit Sampling will occur the second and fourth week of every month (exception: December due to Christmas) At all distribution sites use handheld Cl 2 meter and log data in excel At all distribution sites take 1 - Interior Health bacterial bottle Info needed on bottles: Date, Time, Site Name, WaterTrax Number, Shipped to Caro by Interior Health Fill out requisition Sheets for all sites and send with bottles Samples must be dropped off at Vernon Health Unit on Mondays, Tuesdays or Wednesdays in afternoon on day of sample as courier takes them the next morning. Microbiological samples must be at Caro lab within 24 hours or they cannot be processed. Ice packs in coolers keep samples at 4 C and samples cannot be frozen. Sites Whitevale Well 792 Eastwood Road SS 808 Fraser Road SS Whitevale Sample Sites WaterTrax ID# 137BA 717B EB94 Interior Health Unit Information Vernon Health Unit Ave. Vernon, BC, Open 8:00 am - 4:30 pm Monday to Friday. GVW Sampling (Bi-annual sampling - April and early October) * Distribution and Raw water Sampling (Interior Health bacterial bottles) Raw water (annually - in July) There are no instruments to calibrate Standard check for Cl 2 Handheld Handheld Cl 2 meter Handheld Temperature meter Online Cl 2 meter Equipment Standard check by GVW Calibrated by operator monthly with a single point calibration Sampling Schedule: Whitevale Revision Date: January 4, 2013 Completed by: KP

34 APPENDIX I Summary of Chlorine Residuals and Microbial Sampling

35 Tabular Report 01 January 2012 to 31 December 2012 Whitevale Water System 792 Eastwood Road SS 808 Fraser Road SS Date 9b. Free Chlorine (mg/l) 9c. Total Chlorine (mg/l) 1. Free Chlorine (mg/l) 2. Total Chlorine (mg/l) 1. Free Chlorine (mg/l) 2. Total Chlorine (mg/l) 3-Jan Jan Feb Jul Nov Dec Dec Average Minimum Maximum Count Total 95 Percentile Exceedences * indicates Geometric Mean Report created on 01/09/ :51:43 PM Page 1 of 1

36 Tabular Report 01 January 2012 to 31 December 2012 Whitevale Water System Date 8. P/A Total Coliform (MPN/100mL) 792 Eastwood Road SS 808 Fraser Road SS 9. P/A E.coli (MPN/100mL) Escherichia coli / E. coli (counts) (counts/100ml) Total coliforms (counts) (counts/100ml) 7. P/A Total Coliform (MPN/100mL) 8. P/A E.coli (MPN/100mL) 3-Jan-2012 A A < 1 < 1 17-Jan-2012 A A < 1 < 1 7-Feb-2012 A A < 1 < 1 22-Feb-2012 < 1 < 1 < 1 < 1 < 1 < 1 28-Mar-2012 < 1 < 1 < 1 < 1 < 1 < 1 11-Apr-2012 < 1 < 1 < 1 < 1 24-Apr-2012 < 1 < 1 1-May-2012 < 1 < 1 7-May-2012 < 1 < 1 < 1 < 1 23-May-2012 < 1 < 1 < 1 < 1 11-Jun-2012 < 1 < 1 < 1 < 1 25-Jun-2012 < 1 < 1 < 1 < 1 9-Jul-2012 < 1 < 1 < Jul-2012 < 1 < 1 31-Jul-2012 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 15-Aug-2012 < 1 < 1 < 1 < 1 27-Aug-2012 < 1 < 1 < 1 < 1 10-Sep-2012 < 1 < 1 < 1 < 1 24-Sep-2012 < 1 < 1 < 1 < 1 15-Oct-2012 < 1 < 1 < 1 < 1 22-Oct-2012 < 1 < 1 14-Nov-2012 < 1 < 1 < 1 < 1 26-Nov-2012 < 1 < 1 < 1 < 1 1-Dec Dec-2012 < 1 < 1 ND ND ND ND 18-Dec-2012 < 1 < 1 < 1 < 1 Escherichia coli / E. coli (counts) (counts/100ml) Total coliforms (counts) (counts/100ml) 7. P/A Total Coliform (MPN/100mL) 8. P/A E.coli (MPN/100mL) Escherichia coli / E. coli (counts) (counts/100ml) Total coliforms (counts) (counts/100ml) Average 1.000* 1.000* 1.000* 1.000* 1.000* 1.132* 1.000* 1.000* Minimum A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 Maximum < 1 < 1 < 1 < 1 A A < 1 5 A A < 1 < 1 Count Total 95 Percentile Exceedences * indicates Geometric Mean Report created on 01/03/ :17:09 PM Page 1 of 1

37 Tabular Report 01 January 2011 to 31 December 2011 Whitevale Water System Date E. Coli Whitevale Well 2 Escherichia coli / E. coli (counts) (counts/100ml) Total Coliform Total coliforms (counts) (counts/100ml) 4-Jan-2011 ND < 1 ND < 1 18-Jan-2011 ND < 1 ND < 1 1-Feb-2011 ND < 1 ND < 1 14-Feb-2011 ND < 1 ND < 1 1-Mar-2011 ND < 1 ND < 1 15-Mar-2011 ND < 1 ND < 1 5-Apr-2011 ND < 1 ND < 1 18-Apr-2011 ND < 1 ND < 1 3-May-2011 ND < 1 ND < 1 17-May-2011 ND < 1 ND < 1 6-Jun-2011 ND < 1 ND < 1 21-Jun-2011 ND < 1 ND < 1 5-Jul-2011 ND < 1 ND < 1 19-Jul-2011 ND < 1 ND < 1 2-Aug-2011 ND ND 16-Aug-2011 ND < 1 ND < 1 6-Sep-2011 ND < 1 ND < 1 12-Sep-2011 ND < 1 ND < 1 22-Sep-2011 ND < 1 ND < 1 4-Oct-2011 ND < 1 ND < 1 19-Oct-2011 ND < 1 ND < 1 1-Nov-2011 ND < 1 ND < 1 15-Nov-2011 ND < 1 ND < 1 6-Dec-2011 ND < 1 ND < 1 22-Dec-2011 ND < 1 ND < 1 Average 1.000* 1.000* Minimum < 1 < 1 Maximum < 1 < 1 Count Total 95 Percentile Exceedences * indicates Geometric Mean Report created on 01/10/ :06:29 AM Page 1 of 1

38 Tabular Report 01 January 2011 to 31 December 2011 Whitevale Water System 775 Eastwood Road 808 Fraser 792 Eastwood Road SS 808 Fraser Road SS Date 9b. Free Chlorine (mg/l) 9c. Total Chlorine (mg/l) Free Chlorine (mg/l) Total Chlorine (mg/l) 1. Free Chlorine (mg/l) 4-Jan Jan Feb Feb Mar Mar Apr Apr May May May Jun Jun Jul Jul Jul Aug Aug Sep Sep Sep Oct Oct Nov Nov Dec Dec Total Chlorine (mg/l) 1. Free Chlorine (mg/l) 2. Total Chlorine (mg/l) 1. Free Chlorine (mg/l) 2. Total Chlorine (mg/l) Average Minimum Maximum Count Total 95 Percentile Exceedences * indicates Geometric Mean Report created on 01/09/ :49:55 PM Page 1 of 1

39 Tabular Report 01 January 2011 to 31 December 2011 Whitevale Water System 775 Eastwood Road 808 Fraser 792 Eastwood Road SS 808 Fraser Road SS Date 8. P/A Total Coliform (MPN/100mL) 9. P/A E.coli (MPN/100mL) Escherichia coli / E. coli (counts) (counts/100ml) Total coliforms (counts) (counts/100ml) 8. P/A Total Coliform (MPN/100mL) 9. P/A E.coli (MPN/100mL) Escherichia coli / E. coli (counts) (counts/100ml) Total coliforms (counts) (counts/100ml) 9. P/A Total Coliform (MPN/100mL) 9b. P/A E.coli (MPN/100mL) 4-Jan-2011 A A < 1 < 1 12-Jan-2011 < 1 < 1 < 1 < 1 18-Jan-2011 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 31-Jan-2011 < 1 < 1 < 1 < 1 1-Feb-2011 A A < 1 < 1 14-Feb-2011 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 1-Mar-2011 A A < 1 < 1 15-Mar-2011 A A < 1 < 1 A A < 1 < 1 < 1 < 1 < 1 < 1 5-Apr-2011 A A < 1 < 1 A A < 1 < 1 18-Apr-2011 A A < 1 < 1 A A < 1 < 1 3-May-2011 A A < 1 < 1 A A < 1 < 1 6-May-2011 A A 17-May-2011 A A < 1 < 1 A A < 1 < 1 6-Jun-2011 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 21-Jun-2011 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 5-Jul-2011 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 19-Jul-2011 A A < 1 < 1 A A < 1 25 A A < 1 < 1 2-Aug-2011 A A A A A A 16-Aug-2011 A A < 1 < 1 A A < 1 < 1 ND ND < 1 < 1 6-Sep-2011 A A < 1 < 1 A A < A A < 1 < 1 12-Sep-2011 A A < 1 < 1 ND ND < 1 < 1 A A < 1 < 1 22-Sep-2011 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 4-Oct-2011 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 19-Oct-2011 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 1-Nov-2011 A A < 1 < 1 A A < 1 < 1 15-Nov-2011 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 6-Dec-2011 A A < 1 < 1 22-Dec-2011 A A < 1 < 1 Escherichia coli / E. coli (counts) (counts/100ml) Total coliforms (counts) (counts/100ml) 7. P/A Total Coliform (MPN/100mL) 8. P/A E.coli (MPN/100mL) Escherichia coli / E. coli (counts) (counts/100ml) Total coliforms (counts) (counts/100ml) 7. P/A Total Coliform (MPN/100mL) 8. P/A E.coli (MPN/100mL) Escherichia coli / E. coli (counts) (counts/100ml) Total coliforms (counts) (counts/100ml) Average 1.000* 1.000* 1.000* 1.000* 1.000* 1.000* 1.000* 1.000* 1.000* 2.125* 1.000* 1.000* Minimum A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 A A < 1 < 1 Maximum A A < 1 < 1 A A < 1 < 1 < 1 < 1 < 1 < 1 A A < A A < 1 < 1 Count Total 95 Percentile Exceedences * indicates Geometric Mean Report created on 01/03/ :43:45 AM Page 1 of 1

40 Tabular Report 01 January 2012 to 31 December 2012 Whitevale Water System Date E. Coli (MPN/100mL) Whitevale Well 2 Escherichia coli / E. coli (counts) (counts/100ml) Total Coliform (MPN/100mL) Total coliforms (counts) (counts/100ml) 3-Jan-2012 ND < 1 ND < 1 17-Jan-2012 ND < 1 ND < 1 7-Feb-2012 ND < 1 ND < 1 22-Feb-2012 < 1 < 1 28-Mar-2012 < 1 < 1 7-May-2012 < 1 < 1 11-Jun-2012 < 1 < 1 9-Jul-2012 < 1 < 1 31-Jul-2012 A 1 A 1 15-Aug-2012 < 1 < 1 10-Sep-2012 < 1 < 1 15-Oct-2012 < 1 < 1 14-Nov-2012 < 1 < 1 1-Dec-2012 ND ND Average 1.000* 1.000* Minimum A < 1 A < 1 Maximum A < 1 A < 1 Count Total 95 Percentile Exceedences * indicates Geometric Mean Report created on 01/10/ :07:31 AM Page 1 of 1

41 APPENDIX J Summary of Historic Raw Water Comprehensive Sampling for the Whitevale Well (Well 2)

42 Historic Comprehensive Water Sampling for the Whitevale Water Supply Well INORGANIC Whitevale Well (Well 2) Year Tested Date Tested 16-Jul 8-Jul 14-Jul 13-Jul 19-Jul 31-Jul Aluminum (total) <0.01 < <0.05 <0.05 <0.05 N/A Antimony (total) < <0.003 < < < < Arsenic (total) <0.001 <0.005 <0.005 < < < Barium (total) < < Boron (total) <0.002 < <0.040 <0.040 < Cadmium (total) < < < < < < Calcium (total) N/A Chloride <250 Chromium (total) <0.001 <0.015 < < < < Copper (total) <0.001 < < < <1.0 Cyanide (total) <0.01 <0.01 < 0.01 <0.01 <0.01 < Fluoride <0.10 <0.10 < 0.10 < < Iron (total) <0.30 <0.20 < 0.10 <0.1 <0.1 <0.1 <0.30 Lead (total) < <0.001 < < < < Magnesium (total) N/A Manganese (total) <0.01 < < < < <0.05 Mercury (total) < < < < < Molybdenum (total) <0.001 < N/A Nitrate (as N) <0.01 <0.01 <0.01 <0.01 <0.01 < mg/l as N Nitrite (as N) <0.01 <0.01 < 0.01 <0.01 <0.01 < mg/l as N Potassium (total) N/A Selenium (total) <0.001 <0.005 < < < < Silicon (total as Si) N/A Sodium (total) <200 Sulphate <500 Uranium (total) < < < < Zinc (total) <0.01 <0.010 <0.010 <0.040 <0.040 <5.0 PHYSICAL Whitevale Well (Well 2) MAC AO Alkalinity (bicarbonate, as CaCO 3 ) N/A Colour <5 <5 <5 <5 <5 <5 <15 Conductivity N/A Hardness (total, as CaCO 3 ) see note ph Total dissolved solids / TDS <500 Turbidity < <0.1 <0.1 <0.1 <0.1 1 NTU <5 NTU Notes: N/A - No current Guidline; Reference Health Canada Hardness - no guideline - "Hardness levels between 80 and 100 mg/l as CaCO 3 are considered acceptable; levels greater than 200 are considered poor but can be tolerated; those in excess of 500 are normally considered unacceptable. Turbidity - 1 NTU when disinfection required: <5 NTU aethetic clarity Maximum Acceptable Concentation (MAC) Aesthetic Objective (AO)

43 APPENDIX K Whitevale Water Contact Time Calculation

44 Whitevale Water Contact Time Calculation 13.1 m Reservoir - Length (intake pipe enters south end of reservoir now) 2.7 m Reservoir - Total Height 2.5 m Reservoir - Height (to High Water Level - 100%) 2.13 Reservoir - Height (to Low Water Level - 85%) 7.3 m Reservoir - Width 203 m 3 Reservoir - Volume at low level 75 us.gpm Flow from Well to Reservoir 4.7 L/s Flow from Well to Reservoir - peak hourly 716 minutes Theoretical Detention Time (TDT) - V/Q 0.1 Baffling Factor (no baffling, jet flow from inflow) 72 minutes Contact Time in Reservoir at Peak (TDT X Baffling Factor) Contact Time in Reservoir for peak assumes well pump is running continuously. As WVW well is sourced from a confined aquifer, the water parameters are generally consistant with little to no change in chlorine demand. CT calculation for 1 st customer - sampling point in pump house after reservoir Cl2 Residual mg/l (free) Cl2 Injection mg/l ph raw water Raw Water temp C CT (Cl2 X CT in res) CT - Virus CTa/CTr % Achieved Min. Min. Average Average min-mg/l Required Peak Operations Notes 1. Normal residual range at reservoir is 0.4 to 0.8 mg/l mg/l is minimum 2. Temperature average is about 8 C with a low of 7 C which will not effect the CT-Virus (within range of 5 to 10 C) Completed by: ZM Update date: February 19, 2013 Date Printed: 2/19/2013, 1:47 PM