Estates and Campus Services (ECS) (including water assets directly under its control) WATER SAFETY PLAN Processes, Procedures and Permits

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1 Estates and Campus Services (ECS) (including water assets directly under its control) WATER SAFETY PLAN Processes, Procedures and Permits This Water Safety Plan 'Processes, Procedures and Permits Document' was formally approved by the Director of ECS on: Date: Name: Signed: Version: 1 Issue: 2 Edition: 1 Date of Issue: October 2017 Date of Review: October 2018 HYDROP E.C.S. PREPARED BY: Mike Koumi BSc (Hons) University Authorising Engineer (Water) Wrens Court, 55 Lower Queen Street, Sutton Coldfield, West Midlands, B72 1RT Tel: Fax: info@hydrop.com Unless explicitly stated otherwise, all rights including those in copyright in the content of this document, with the exception of all University specific Policies appended herein, are owned by or controlled for these purposes by HYDROP ECS. Except as otherwise expressly permitted under copyright law or HYDROP ECS's Terms of Use, the content of this document, for purposes other than those intended by the production and (internal) publication of this document, may not be copied, reproduced, republished, downloaded, posted, broadcast or transmitted to a third party in any way without first obtaining HYDROP ECS's and the University s written permission. Where the documents exist that are the responsibility of individual authors, the views contained within said documents do not necessarily represent the views of HYDROP ECS.. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 1 of 86

2 CONTENTS i. DISTRIBUTION CONTROL 1. INTRODUCTION AND AIM 2. MANAGEMENT PRO-FORMAS i. Permit to derogate from instructions detailed in the WSP ii. Risk Assessment Status Enquiry Pro-forma iii. Urgent - Interim Problem Notification Pro-forma iv. Consultancy Memorandum Pro-forma v. Local Legionella Contamination Risk Assessment 3. PPM TASK SPECIFICATION i. Distribution and Outlet Temperature Monitoring ii. General visual inspections of hot and cold water end-of-line fittings iii. ClO2 Level Monitoring iv. Water Storage Tank Temperature Monitoring v. Water Storage Tank Visual General Inspection vi. Water Storage Tank - 24 hr Drop-test vii. Storage Calorifier or Plate Heat Exchanger Buffer Vessel 24 hr Temperature Profiling viii. Storage Calorifier or Plate Heat Exchanger Buffer Vessel Manual Temperature Monitoring ix. Storage Calorifier or Plate Heat Exchanger Buffer Vessel Visual General Inspection including drain flushing x. Circulation and destratification pumps visual inspections and servicing xi. Expansion and Pressurisation Vessel Flushing (Non Flow-Through types only) xii. Cistern Type Water Heaters Temperature Monitoring xiii. Cistern Type Water Heaters Inspection of Tank Section xiv. Cistern Type Water Heaters Clean and Disinfection xv. Low Volume Water 15 litres Temperature Monitoring xvi. Combination Boiler Temperature Monitoring xvii. Instant Water <15 litres Temperature Monitoring Temperature Monitoring xviii. Thermostatic Mixing Valves/Taps Temperature Monitoring xix. Thermostatic Mixing Valves/Taps General Condition Inspections & servicing xx. Thermostatic Mixing Valves/Taps Clean, Descale and Disinfection xxi. Shower Heads Temperature Monitoring xxii. Shower Heads Head Replacement / Clean and Disinfection xxiii. Air Conditioning/Air Handling Trap cleaning and disinfection xxiv. Air Conditioning/Air Handling General Inspection/Clean & disinfection xxv. Air Conditioning/Air Handling Clean & disinfection 4. AD-HOC RISK MANAGEMENT AND CONTROL PROCESSES i. Microbiological Sample Collection Protocol ii. Small sized pipework installation projects and associated components pre and post installation cleaning and disinfection iii. Water storage tank cleaning and disinfection using Sanosil (Silver stabilised hydrogen peroxide) iv. Water storage tank cleaning and disinfection using Sodium hypochlorite - Spray Method and/or Soak Method v. Domestic water services disinfection using Sanosil (Silver stabilised hydrogen peroxide) vi. Domestic water services disinfection using Chlorine Dioxide (ClO2) as the disinfecting agent vii. Domestic water services disinfection using Sodium hypochlorite (NaClO) as the disinfecting agent viii. Calorifier or Plate Heat Exchanger Buffer Vessel Pasteurisation ix. Domestic Water HWS distribution system pasteurisation x. Point of Use (POU) filter installation and replacement xi. Dead Legs/Areas of Low-Use - Usage Evaluation & Flushing xii. Management of Water Dispensers/Water Coolers xiii. Notification of Closure of Facility Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 2 of 86

3 5. CERTIFICATES OF CONFORMITY i. Water storage tank cleaning and disinfection using Sanosil (Silver stabilised hydrogen peroxide) ii. Water storage tank cleaning and disinfection using Sodium hypochlorite - Spray Method iii. Water storage tank cleaning and disinfection using Sodium hypochlorite - Soak Method iv. Domestic water services disinfection using Sanosil (Silver stabilised hydrogen peroxide) v. Domestic water services disinfection using Chlorine Dioxide (ClO2) as the disinfecting agent vi. Domestic water services disinfection using Sodium hypochlorite (NaClO) as the disinfecting agent vii. Calorifier or Plate Heat Exchanger Buffer Vessel Pasteurisation viii. Domestic Water HWS Distribution System Pasteurisation ix. Dead Legs/Areas of Infrequent Use Usage Evaluation and Flushing Reporting Process Pro-forma 6. PERMITS AND NOTIFICATIONS i. Permit for Release into Use of new installations of small sized pipework installation projects and associated components ii. Permit for the Installation of new Water Dispenser/Water Cooler iii. Permit for the Installation of new Ice Making Machine iv. Permit to Use Portable Wet Evaporative Cooling Point-of-use Air Conditioning Unit v. Notification of Closure of Facility and Permit to Re Occupy Where facility is NOT subject to modification/refurbishment Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 3 of 86

4 i. DISTRIBUTION CONTROL This ECS Water Safety Plan (WSP) - 'Processes, Procedures and Permits' has a controlled circulation and should not be copied without the permission of the Director of Asset Management and Compliance. The following hold authorised copies: AUTHORISED COPY HOLDER COPY N o. A signed Receipt of Document Certificate from each Authorised Copy Holder shall be enclosed in Appendix 1. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 4 of 86

5 1. INTRODUCTION AND AIM This WSP - Processes, Procedures and Permits provides the detailed instruction, specification and infrastructure for the implementation of the ECS WSP requirements. It is expected that this document will be complied with by all the ECS employees and by all appointed contractors, in whatsoever capacity, with or without contractual agreements. This document shall be used in conjunction with all other pertinent policies including the ECS s Water Safety Plan. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 5 of 86

6 2. MANAGEMENT PRO FORMAS Pro-forma Reference No. 1 No. 2 No. 3 No. 4 No. 5 Task Details Permit to derogate from instructions detailed in the WSP Risk Assessment Status Enquiry Pro-forma Urgent - Interim Problem Notification Pro-forma Consultancy Memorandum Pro-forma Local Legionella Contamination Risk Assessment Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 6 of 86

7 Management Pro-forma No. Task: Application submitted by: 1 Permit to derogate from instructions detailed in the WSP Date Location/System affected by this derogation: Specific section/instruction pertaining to the sought derogation: Reasons for seeking derogation: Proposed alternative processes/procedures/ instructions: Potential issues which may arise from this derogation and proposed pertinent mitigation: This section to be completed by Director of Asset Management and Compliance Derogation approved? YES/NO Director of Asset Management and Compliance: Signed:... Date:... Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 7 of 86

8 Water Quality Management And Control PPM Programme Risk Assessment Status Enquiry Management Pro-forma No. 2 Purpose: To review existing Legionella risk assessments (RA) to ensure that it remains current and that the management and control systems are effective. Site: Property: Date of most recent risk assessment: Risk Assessment ref. No. Methodology: New and revised risk assessments shall be commissioned as and when required. The status of each assessment shall be reviewed by the Operational Responsible Person, with oversight from the Health, Safety and Compliance Officer ECS and with contribution from the Duty Holders, on at least an annual basis and instructions given to the Director of Asset Management and Compliance to commission new risk assessments whenever there is reason to believe that the original assessment may no longer be valid or in accordance with the schedule detailed in the table below: 7775 Query Comments i) Has there been a significant change to the plant or water or its use? ii) Has there been a significant change to the use of the building in which the system is installed? iii) Has there been a significant change to related guidance regarding risks or control measures? iv) Has there been a significant change to key personnel? v) Have sample results indicated that the control measures are no longer effective? Additional Notes Date of review: Review conducted by: Operational Responsible Person Signature: Next Process required: New risk assessment Review most current risk assessment in 12-months Date of next review: Signature of Health, Safety and Compliance Officer Estates and Campus Services Date of check Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 8 of 86

9 7775 Water Quality Management And Control PPM Programme URGENT Interim Problem Notification Management Pro-forma No.3 No Tasks Comments 1 Date of Risk Assessment: 2 Risk Assessment Ref. No.: 3 Risk Assessor: 4 Building/Facility: 5 System: 6 Date of fault identification: 7 Level of Risk posed by the fault identified: 8 Remedial Works Priority Level: 9 Fault description: 10 Remedial Works required: 11 Date Remedial Works completed: Works Ref. No.: 12 Works completed by: 13 Current status of fault: Additional Comments Signature of Water Systems Operational Responsible Person Date of check Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 9 of 86

10 7775 Water Quality Management And Control PPM Programme Consultancy Memorandum Management Pro-forma No.4 Subject: Issued by: Date: Comments Signature of Water Systems Operational Responsible Person Date of check Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 10 of 86

11 Management Pro-forma No.4 Task: LOCAL LEGIONELLA CONTAMINATION RISK ASSESSMENT Frequency: AS REQUIRED Outlet Asset No. Location: Date of risk assessment: Carried out by: Signature Parameter A. System/Operational Conditions Infrequently used outlet 1 Presence of local dead-legs 1 Scale and/or dirt on outlet aerator and/or flow straightener 1 Scale and/or dirt on the TMV/TMT strainer 1 Water temperatures/on-line disinfectant outside of control limits 1 Lack of proper hand wash basins assignment 1 Evidence of improper use of hand wash basin 1 Evidence of poor cleaning practices 1 A: Sub Total Risk Weight Points B. Managed Mitigation None 1 POU filter adequately fitted to outlet 0.5 'User' removed/outlet isolated 0 C. System Contamination B: Sub Total Legionella 1 Legionella sp. >100 - <1000cfu/l 2 Legionella sp. >1000cfu/l 3 D. 'User' Susceptibility C: Sub Total Low 1 Moderate 2 High 3 D: Sub Total Total: A x B x C x D Scored Overall Risk Score Assessed Risk Actions 0 NONE Review local risk assessment when need arises 1-20 LOW Continue to monitor system MODERATE Investigate and correct system failures HIGH >65 URGENT Ensure that the 'User' is not exposed to the domestic water system unless the outlets accessible to the 'User' are fitted with Point-of-Use filters. Investigate and correct system failures. Ensure that the 'User' is not exposed to the domestic water system unless the outlets accessible to the 'User' are fitted with Point-of-Use filters. Relocate 'User' where practicable and only allow further use of contaminated outlet when contamination has been brought under control. Investigate and correct system failures. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 11 of 86

12 3. PPM TASK SPECIFICATIONS Task Reference (LEG) No. LEG 01A LEG 01B LEG 02A LEG 03 LEG 04 LEG 05 LEG 06 LEG 07 LEG 08 LEG 09 LEG 10 LEG 11 LEG 12 LEG 13 LEG 14 LEG 15 LEG 16 LEG 17 LEG 18 LEG 19 LEG 20 LEG 21 LEG 22 LEG 23 LEG 24 Task Details Distribution and Outlet Temperature Monitoring General visual inspections of hot and cold water end-of-line fittings ClO2 Level Monitoring Water Storage Tank Temperature Monitoring Water Storage Tank Visual General Inspection Water Storage Tank - 24 hr Drop-test Storage Calorifier or Plate Heat Exchanger Buffer Vessel 24 hr Temperature Profiling Storage Calorifier or Plate Heat Exchanger Buffer Vessel Manual Temperature Monitoring Storage Calorifier or Plate Heat Exchanger Buffer Vessel Visual General Inspection including drain flushing Circulation and destratification pumps visual inspections and servicing Expansion and Pressurisation Vessel Flushing (Non Flow-Through types only) Cistern Type Water Heaters Temperature Monitoring Cistern Type Water Heaters Inspection of Tank Section Cistern Type Water Heaters Clean and Disinfection Low Volume Water 15 litres Temperature Monitoring Combination Boiler Temperature Monitoring Instant Water <15 litres Temperature Monitoring Temperature Monitoring Thermostatic Mixing Valves/Taps Temperature Monitoring Thermostatic Mixing Valves/Taps General Condition Inspections & servicing Thermostatic Mixing Valves/Taps Clean, Descale and Disinfection Shower Heads Temperature Monitoring Shower Heads Head Replacement / Clean and Disinfection Air Conditioning/Air Handling Trap cleaning and disinfection Air Conditioning/Air Handling General Inspection/Clean & disinfection Air Conditioning/Air Handling Clean & disinfection Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 12 of 86

13 Task No: Task: Frequency: LEG 01A Distribution and Outlet Temperature Monitoring AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. Cold water at temperatures of <20 o C*. ii. Cold Water Services (CWS) Distribution at <20 o C*. iii. Stored hot water at >60 o C. iv. Hot Water Services (HWS) Flow at >60 o C. v. HWS Distribution at all outlets at 50 o C. vi. HWS Returns at 50 o C. *In normal circumstances water should be delivered by the water undertaker at below 20 o C, however, during summer months, temperatures above 20 o C may occur. General i. Water temperatures at all outlets, both CWS and HWS, shall be measured at least once annually and Sentinel outlets shall be measured at regular intervals. Temperatures shall be measured after two and one minute at full flow respectively. Note: Where designated sentinel outlets are fitted with TMV/TMT, the temperature of the hot and cold supply must be measured from binder points or by surface (contact) temperature measurement. If contact probe is to be used for temperature monitoring through copper pipework, a 2 o C temperature adjustment must be added to the recorded temperature (of HWS services) before reporting temperature on the electronic data management system. CWS The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the vessel during a typical daily usage profile. i. The outlet temperature measured after allowing the water to run for 2 minutes shall not exceed 20 o C. Where the temperature exceeds 20 o C, the cold water temperature at the point of supply must be measured. When the supply temperature is between 18 o C and 25 o C, the measured outlet temperature, after running the tap for 2 minutes, shall be less than 2 o C higher than that at the point of supply. ii. iii. iv. The Water Systems Operational Responsible Person shall be informed whenever the temperature exceeds 20 o C, who shall notify appropriate members of the Estates and Campus Services Management Team to determine if further control measures or monitoring are required. Any tap which fails this test must be considered as a potential risk and the whole cold water system shall be investigated. If the point of supply temperature exceeds 25 o C, the water company shall be alerted. On each monitoring visit, the temperature of the mains water source must be measured, including any cold water storage water tank when the CWS temperature at the selected outlets tested is measured and found to exceed 20 o C. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 13 of 86

14 HWS i. The outlet temperature measured after allowing the water to run for 1 minute shall exceed 50 o C. Where the temperature fails to reach the required temperature, the source shall be measured and adjusted as necessary, and the Water Systems Operational Responsible Person informed as appropriate. ii. On each monitoring visit, the temperature of the source supply (Calorifier or Plate Heat Exchanger Buffer Vessel) must be measured. This must include the Flow and Return temperatures of each Unit in the system. Blended Outlets The outlet temperature measured shall NOT exceed: a. 41 o C max for showers. b. 41 o C max for washbasins. c. 44 o C max for bath. d. 38 o C max for bidets. Where the temperature exceeds the required temperature, the source shall be measured and adjusted as necessary, and the Water Systems Operational Responsible Person informed as appropriate. Where designated sentinel outlets are fitted with TMV/TMT, the temperature of the hot and cold supply must be measured by surface (contact) temperature measurement. If contact probe is to be used for temperature monitoring through copper pipework, Temperatures must be collected as described in BSRIA Application Guide AG 4/94 Guide to Legionellosis Temperature measurements for hot and cold water services. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the system during a typical daily usage profile. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 14 of 86

15 Task No: Task: Frequency: LEG 01B General visual inspections of hot and cold water end-of-line fittings AS SPECIFIED IN SECTION 7 OF THE ECS WSP OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. Report on the operational status of the fitting. ii. Visually inspect the condition of the external surfaces of the fitting and comment. iii. Visually inspect (if possible) the condition of the internal surfaces of the fitting and comment. If practicable, isolate unit in order to allow for thorough internal inspection, including any strainers installed, to be carried out. iv. Visually inspect the condition of all aerators and flow straighteners fitted and comment. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 15 of 86

16 Task No: LEG 02A Task: Chlorine Dioxide (ClO2) Level Monitoring Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. Chlorine dioxide is an oxidising biocide capable of reacting with a wide range of organic substances. Levels of 0.5 ppm can, if properly managed, be effective against planktonic and sessile legionella (biofilm) in domestic water systems. The Drinking Water Inspectorate prescribes a maximum value for chlorine dioxide in drinking water supplies which is the combined chlorine dioxide, chlorite and chlorate concentration. This must not exceed 0.5 ppm as chlorine dioxide. There are a number of commercial systems available that release chlorine dioxide into water systems and it may be necessary to contact the local water company in order to check that the installation complies with the requirements of the Water Regulations Using a suitably calibrated electronic chlorine dioxide test kit, the following areas are checked at regular intervals: i. DAILY - the quantity of chemicals in the reservoir; ii. DAILY - the rate of addition of chlorine dioxide to the water supply (this to be done automatically and subject to appropriate alarms); iii. DAILY - the concentration of chlorine dioxide at dosing points - between 0.25 and 0.8ppm (Note: 0.8ppm must be consider as the maximum allowed level at point of injection and it is only allowed at this level at this point in order to allow for the minimum levels to be achieved at the point of delivery). Any level fluctuations must only be tolerated within this range and care must be exercised to ensure that the level of ClO2 at the nearest outlet does not exceed 0.5ppm (this to be done automatically and subject to appropriate alarms); iv. MONTHLY - the concentration of chlorine dioxide at, at least, the sentinel taps - the concentration must be between 0.25 and 0.5 ppm; v. on an annual basis, the chlorine dioxide concentration at a representative number of outlets - the concentration must be between 0.25 and 0.5 ppm. Chemical sampling must be accompanied by temperature of the outlet measured and usage evaluation of the same. While chlorine dioxide is not affected by the ph or hardness of the water, it is sometimes difficult to monitor chlorine dioxide samples in domestic HWS due to its increased volatility causing the chlorine dioxide reserve to be lost when taking a water sample. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 16 of 86

17 Task Reference No.: LEG 03 Task: Water Storage Tank Temperature Monitoring (to be carried out at the same time as LEG 04) Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. Using a calibrated thermometer, measure and report the following: i. Ambient (external temperature via BMS). ii. Tank room temperature. iii. Stored water temperature (Temperature of the tanked water should be monitored via the drain point if practicable). iv. Incoming supply. v. Supply temperature (tank outlet temperature). Note: Remember to measure and record temperature reading from as far away from the ball cock as possible. Care must be taken as not to contaminate the stored water by the use of unclean temperature probes. If contact probe is to be used for temperature monitoring through copper pipework, temperatures must be collected as described in BSRIA Application Guide AG 4/94 Guide to Legionellosis Temperature measurements for hot and cold water services. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the system during a typical daily usage profile. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 17 of 86

18 Task Reference No.: LEG 04 Task: Water Storage Tank Visual General Inspection (to be carried out in conjunction with tank room inspection) Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. All external surfaces shall be wiped cleaned with wetted cloth prior to opening of lid. ii. Using a calibrated thermometer, measure and report the following: Ambient (external temperature); Tank room temperature; Stored water temperature (Temperature of the tanked water should be monitored via the drain point if practicable); Supply temperature iii. Visually inspect tank room for bird and/or rodent infestation and state amount. iv. If insulation allows for inspection of the external condition of the tank walls, inspect for corrosion pitting and leaks. v. Visually inspect internal walls of tank for signs of scale deposition, corrosion and slime deposits. vi. Visually inspect tank and associated valves/pipework for leaks. vii. Visually inspect bottom of tank for sludge deposition and state amount. viii. Visually inspect water surface for; dirt, oil films, insects and state amount. viii. Visually inspect for slimy deposits on the internal walls of tank and state the colour of substance and state amount. ix. Visually inspect for algae growth indicated by either green or red plant like growth on water surface. i. Visually inspect the insulation for signs of wear and tear and areas where the insulation has been removed. ii. Visually inspect that the lid is correctly fitted and that any bolts are securely tightened. iii. Visually inspect that all insect/rodent screens fitted are clear from debris so that water can flow easily. iv. Visually inspect all valves for correct operation, signs of corrosion and leaks. v. Visually inspect all booster pumps fitted for correct operation. vi. Indicate the date that the tank was last cleaned and disinfected and indicate whether it was disinfected as routine or due to adverse conditions. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 18 of 86

19 Extract from HSE HSG 274 Part 2: The control of legionella bacteria in hot and cold water systems Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 19 of 86

20 Task Reference No.: LEG 05 Task: Water Storage Tank Capacity Determination (To be carried out on an As Required basis) Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. Water storage tanks shall be sized and arranged so as to minimise retention time of stored water (12hrs maximum), and therefore to increase the rate of stored water exchange. Water storage tanks shall be subjected to a periodic need test which requires the Operational Responsible Person to question the presence of each unit and consider its removal if the services it supplies can be, equally well, supplied by converting the systems to domestic Mains fed only. Each unit shall be subjected to a Capacity Determination designed to ascertain the capacity and demand requirements of each system, in order to ensure that excessive volumes of water are not unnecessarily stored. Note: When tanks are linked, readings should be taken for each tank. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 20 of 86

21 Task Reference No.: LEG 06 Task: Frequency: Storage Calorifier or Plate Heat Exchanger Buffer Vessel 24hr Temperature Profiling (To be carried out on an As Required basis) AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. Operating temperatures of storage Calorifiers or Plate Heat Exchanger Buffer Vessels must be maintained within the following limits: FLOW TEMPERATURE: 60 o C RETURN TEMPERATURE: 50 O C DRAIN TEMPERATURE: 60 O C COLD FEED TEMPERATURE: <20 o C i. Where the unit is monitored using BMS, collect the readings of all the fields listed above, for at least a 24hr period and consider the results. Adjust control parameters as necessary. ii. Where the unit is not monitored using BMS, attach a data-logger on the flow, return, and cold feed (as close to the unit as practicable) and collect temperature data for at least a 24hr period and consider the results. Adjust control parameters as necessary and the frequency and duration of temperature logging dependent upon results. If contact probe is to be used for temperature monitoring through copper pipework, temperatures must be collected as described in BSRIA Application Guide AG 4/94 Guide to Legionellosis Temperature measurements for hot and cold water services. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the system during a typical daily usage profile. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 21 of 86

22 Task Reference No.: LEG 07 Task: Storage Calorifier or Plate Heat Exchanger Buffer Vessel Manual Temperature Monitoring Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. Measure and record the Flow temperature using a contact thermometer or fitted gauge. Temperature to be taken from Flow pipework as close to the Calorifier or Plate Heat Exchanger Buffer Vessel as possible. Temperature to exceed 60 o C. ii. Measure and record the Return temperature using a contact thermometer or fitted gauge. Temperature to be taken from Return pipework as close to the Calorifier or Plate Heat Exchanger Buffer Vessel as possible. Temperature must exceed 50 o C. iii. Isolate Cold Feed and open drain point and measure and record temperature. Temperature must exceed 60 o C. iv. Measure and record the Cold Feed temperature using a contact thermometer or fitted gauge. Temperature to be taken from Cold Feed pipework, one metre from the Calorifier or Plate Heat Exchanger Buffer Vessel if possible. Temperature must not to exceed 20 o C. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the vessel during a typical daily usage profile. If contact probe is to be used for temperature monitoring through copper pipework, temperatures must be collected as described in BSRIA Application Guide AG 4/94 Guide to Legionellosis Temperature measurements for hot and cold water services. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the system during a typical daily usage profile. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 22 of 86

23 Task Reference No.: LEG 08 Task: Storage Calorifier or Plate Heat Exchanger Buffer Vessel General Visual Inspection including drain flushing (to be carried out at the same time as LEG 07 and in conjunction with plant room inspection) Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. Ensure operational status of Calorifier or Plate Heat Exchanger Buffer Vessel by checking the status of the associated isolation valves. ii. If the Calorifier or Plate Heat Exchanger Buffer Vessel is OFF, indicate the date it came Off-line. iii. Confirm status of Inlet Valve and Confirm status of Outlet Valve. iv. Confirm the operational status of the circulation pump(s) and destratification pumps. v. Visually inspect Calorifier or Plate Heat Exchanger Buffer Vessel and associated valves for leaks. vi. Visually inspect all pipework for signs of corrosion and leaks, and visually inspect the condition of insulation fitted. Visually inspect all valves for correct operation, signs of corrosion and leaks. Visually inspect all pumps fitted for correct operation and leaks. vii. Measure and record the temperature setting of the thermostat (if fitted). viii. Measure and record the Flow and Return temperature using a contact thermometer or fitted gauge. Temperature to be taken from flow pipework as close to the Calorifier or Plate Heat Exchanger Buffer Vessel as possible. ix. Isolate CW feed and open drain point into a bucket and collect approximately the 1st litre of water discharged. Measure and record the condition, viscosity and colour of this water. x. Check for colour, viscosity and sludge deposition amount. Measure and record the temperature of the water collected. xi. Using a contact thermometer, measure and record the temperature of the Calorifier or Plate Heat Exchanger Buffer Vessel at; the top, middle and bottom. If there is more than 10 o C difference between the top temperature and the bottom temperature then the Calorifier or Plate Heat Exchanger Buffer Vessel is suffering from temperature stratification. If a contact thermometer cannot be used, then measure and record the difference in the flow temperature and the drain temperature. xii. Visually inspect the insulation for signs of wear and tear and areas where the insulation has been removed. xiii. Visually inspect that any gauges fitted are operating correctly. Compare against calibrated instruments. xiv. Open the CW feed valve and then open the drain point allowing enough water to flow through so that any water discoloration is removed. xv. Indicate the date that the Calorifier or Plate Heat Exchanger Buffer Vessel was last pasteurised and indicate whether it was disinfected as routine or due to adverse conditions xvi. Indicate the date of the last insurance inspection, if applicable. If contact probe is to be used for temperature monitoring through copper pipework, temperatures must be collected as described in BSRIA Application Guide AG 4/94 Guide to Legionellosis Temperature measurements for hot and cold water services. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the system during a typical daily usage profile. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 23 of 86

24 Task Reference No.: LEG 09 Task: Circulation and destratification pumps visual inspections and servicing Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. Check circulating pumps for adequate performance to ensure a minimum circulating temperature of 50ºC. ii. In case of a standby pump being available for immediate connection into the HWS circulating system, switch on to ensure that the standby on backup pump can be brought into service. It is not permissible to shut down the pumped circulation system. To do so will lead to the loss of the required system temperature. If contact probe is to be used for temperature monitoring through copper pipework, temperatures must be collected as described in BSRIA Application Guide AG 4/94 Guide to Legionellosis Temperature measurements for hot and cold water services. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the system during a typical daily usage profile. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 24 of 86

25 Task Reference No.: LEG 10 Task: Frequency: Expansion and Pressurisation Vessel Flushing (Non Flow-Through types only) AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. Where expansion and pressurisation vessels are of the single entry type they must be fitted with suitable 'anti-legionella valves' or, where this is not practicable, with appropriate drain valves to facilitate flushing of the unit. Care must be taken to avoid damage to the diaphragm while flushing. Procedure should be carried out as follows: i. Isolate the vessel at the isolation valve ii. Drain the water from the drain valve, collecting the water to allow for inspection and reporting on the condition. iii. Open the isolation valve to refill the vessel. iv. Repeat steps i-iii until the water collected is clear and at the same temperature as the system water. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 25 of 86

26 Task Reference No.: LEG 11 Task: Cistern Type Water Heaters Temperature Monitoring Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. Measure and record the Set temperature setting of the thermostat (if fitted and calibrated). Temperature to be at least 60 o C. ii. Measure and record the temperature of the furthest outlet supplied by the unit. Temperature to be at least 50 o C within 1 min. If contact probe is to be used for temperature monitoring through copper pipework, a 2 o C temperature adjustment must be added to the recorded temperature before reporting temperature on the electronic data management system. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the vessel during a typical daily usage profile. If contact probe is to be used for temperature monitoring through copper pipework, temperatures must be collected as described in BSRIA Application Guide AG 4/94 Guide to Legionellosis Temperature measurements for hot and cold water services. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the system during a typical daily usage profile. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 26 of 86

27 Task Reference No.: LEG 12 Task: Cistern Type Water Heaters Inspection of Tank Section Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. If casing allows for inspection of the external condition of the unit walls, inspect for corrosion pitting and leaks. ii. Visually inspect tank and associated valves/pipework for leaks. iii. Visually inspect bottom of tank for sludge deposition and state amount. iv. Visually inspect internal walls of tank for corrosion and state amount. v. Visually inspect water surface for; dirt, oil films, insects and state amount vi. Visually inspect for slimy deposits on the internal walls of tank and state the colour of substance and state amount. vii. Visually inspect for algae growth indicated by either green or red plant like growth on water surface. viii. Visually inspect the insulation of the unit (if practicable) for signs of wear and tear. ix. Visually inspect that the lid is correctly fitted. x. Visually inspect that all insect/rodent screens fitted are clear from debris so that water can flow easily. xi. Visually inspect that the ball valve opens and closes correctly. xii. Visually inspect all pipework for signs of corrosion and leaks, and check the condition of insulation fitted. xiii. Indicate the date that the tank was last cleaned and disinfected and indicate whether it was disinfected as routine or due to adverse conditions. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 27 of 86

28 Task Reference No.: LEG 13 Task: Cistern Type Water Heaters Clean and Disinfection Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. To be cleaned and disinfected in accordance with LEG 27/LEG 28. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 28 of 86

29 Task Reference No.: LEG 14 Task: Low Volume Water 15 litres Temperature Monitoring and Condition Inspection Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. Measure and record the Set temperature setting of the thermostat (if fitted and calibrated). Temperature to be at least 60 o C. ii. Measure and record the temperature of the furthest outlet supplied by the unit. Temperature to be at least 50 o C within 1 min. iii. Ensure operational status of the unit by checking the status of the associated isolation valves. iv. If the unit is OFF, indicate the date it came Off-line. v. Confirm status of Inlet Valve and Confirm status of Outlet Valve. vi. Confirm the operational status of the circulation pump(s) and destratification pumps (if installed). vii. Visually inspect unit and associated valves for leaks. viii. Visually inspect all pipework for signs of corrosion and leaks, and visually inspect the condition of insulation fitted. Visually inspect all valves for correct operation, signs of corrosion and leaks. Visually inspect all pumps fitted for correct operation and leaks. ix. Measure and record the temperature setting of the thermostat (if fitted). x. Measure and record the Flow and Return temperature using a contact thermometer or fitted gauge. Temperature to be taken from flow pipework as close to the unit as possible. xi. If practicable, isolate CW feed and open drain point into a bucket and collect approximately the 1st litre of water discharged. Measure and record the condition, viscosity and colour of this water. xii. Check for colour, viscosity and sludge deposition amount. Measure and record the temperature of the water collected. xiii. Visually inspect the insulation for signs of wear and tear and areas where the insulation has been removed. xiv. Visually inspect that any gauges/thermostats fitted are operating correctly. Compare against calibrated instruments. xv. Indicate the date that the unit was last pasteurised and indicate whether it was disinfected as routine or due to adverse conditions. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the vessel during a typical daily usage profile. If contact probe is to be used for temperature monitoring through copper pipework, temperatures must be collected as described in BSRIA Application Guide AG 4/94 Guide to Legionellosis Temperature measurements for hot and cold water services. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the system during a typical daily usage profile. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 29 of 86

30 Task Reference No.: LEG 15 Task: Combination Boiler Temperature Monitoring and Condition Inspection Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. Measure and record the Set temperature setting of the thermostat (if fitted and calibrated). Temperature to be at least 60 o C. ii. Measure and record the temperature of the furthest outlet supplied by the unit. Temperature to be at least 50 o C within 1 min. iii. Ensure operational status of the unit by checking the status of the associated isolation valves. iv. If the unit is OFF, indicate the date it came off-line. v. Confirm status of Inlet Valve and Confirm status of Outlet Valve. vi. Confirm the operational status of the circulation pump(s) and destratification pumps (if installed). vii. Visually inspect unit and associated valves for leaks. viii. Visually inspect all pipework for signs of corrosion and leaks, and visually inspect the condition of insulation fitted. Visually inspect all valves for correct operation, signs of corrosion and leaks. Visually inspect all pumps fitted for correct operation and leaks. ix. Measure and record the temperature setting of the thermostat (if fitted). x. Measure and record the Flow and Return temperature using a contact thermometer or fitted gauge. Temperature to be taken from flow pipework as close to the unit as possible. xi. Visually inspect the insulation for signs of wear and tear and areas where the insulation has been removed. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the vessel during a typical daily usage profile. If contact probe is to be used for temperature monitoring through copper pipework, temperatures must be collected as described in BSRIA Application Guide AG 4/94 Guide to Legionellosis Temperature measurements for hot and cold water services. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the system during a typical daily usage profile. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 30 of 86

31 Task Reference No.: LEG 16 Task: Frequency: Instant Water <15 litres Temperature Monitoring Temperature Monitoring and Condition Inspection AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. i. Units of this type, because of the limited stored water volume, do not usually need to be operated within the temperature profile and limits prescribed for larger systems ( 60 o C for the flow and ( 50 o C for the return and outlet ) which are necessary for thermal disinfection. It may be possible to operate these units at safe temperatures of 41.0 o C although they should be switched on at all times to ensure and encourage adequate use. However, infrequent use of these units (less than weekly) would increase the potential of bacterial growth and proliferation (as would be the case in all infrequently used areas throughout the system both hot and cold), although particularly in this case because of the low temperatures operated. ii. Visually inspect and report the general operational and physical condition of the unit and consider its current status regarding general status of repair. If contact probe is to be used for temperature monitoring through copper pipework, temperatures must be collected as described in BSRIA Application Guide AG 4/94 Guide to Legionellosis Temperature measurements for hot and cold water services. The temperature measurements shall be carried out at different times during the day in order to allow indicative temperature monitoring of the system during a typical daily usage profile. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 31 of 86

32 Task Reference No.: LEG 17 Task: Thermostatic Mixing Valves/Taps Temperature Monitoring Frequency: AS SPECIFIED IN SECTION 7 OF THE ECS WSP If the maintenance staff or appointed contractor cannot, at any stage, comply with any part of this specification, then an alternative specification shall be agreed which both meets the requirements of current legislation and the needs of the site. SHOWERS, BATHS AND BIDETS (WHERE INSTALLED) i. Measure and record the temperature of the local HWS return pipework, the temperature shall be 50 o C. ii. Measure and record the Initial ( as-found ) and Final outlet temperature, of each shower and bath fitted with a Thermostatic Mixing Valve/Tap (TMV/TMT or otherwise). The measurements shall be carried out immediately and after allowing the water to run for 1 minute at full-flow respectively. The Initial and Final outlet temperature measured shall not exceed: a. 41 o C max for showers. b. 44 o C max for baths. c. 38 o C max for bidets. Where these temperatures are exceeded, the TMV/TMT shall be adjusted in order to allow the unit to operate within the recommended temperature limits described above. iii. Using an electronic and calibrated thermometer with a suitable contact probe, measure and record the temperature of the HWS and CWS supply pipes of each TMV/TMT. The temperature of the CWS shall not exceed 20 o C and the temperature of the HWS shall not be less than 50 o C.The measurements shall be carried out following task (ii). SINKS AND BASINS AND OTHER NON FULL BODY IMMERSION OUTLETS i. Measure and record the temperature of the local HWS return pipework, the temperature shall be 50 o C. ii. Measure and record the Initial and Final outlet temperature, of the HOT water outlet of each sink, basin and other non-full body immersion outlets fitted with a Thermostatic Mixing Valve/Tap (TMV/TMT or otherwise). The measurements shall be carried out immediately and after allowing the water to run for 1 minute at full-flow respectively. The Initial and Final outlet temperature measured shall not exceed 41 o C. Where these temperatures are exceeded, the TMV/TMT shall be adjusted in order to allow the unit to operate within the recommended temperature limits described above. iii. Using an electronic and calibrated thermometer with a suitable contact probe, measure and record the temperature of the HWS supply pipe ONLY of each TMV/TMT. The temperature of the HWS shall not be less than 50 o C. The measurements shall be carried out following task 2. (ii). iv. Measure and record the COLD water outlets of each sink, basin and other non-full body immersion outlets fitted with a Thermostatic Mixing Valve/Tap (TMV/TMT or otherwise). The measurements shall be carried out immediately and after allowing the water to run for 2 minutes at full-flow respectively. The outlet temperature measured shall not exceed 20 o C. Water Safety Plan 'Processes and Procedures' Version: 1 Issue: 2 Edition: 1 Date: October 2017 Page 32 of 86