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United Utilities Water Ltd: SCHEDULE OF WORKS for Final Enforcement Order

UNITED UTILITIES WATER LTD

REFERENCE NO: UUT-2020-00002

  1. WATER TREATMENT WORKS AND CONNECTED SUPPLY SYSTEM
  • T229 Oswestry WTW
  • Z120 Lightshaw
  • Z121 Ashton
  • Z122 St Helens North
  • Z125 Haydock
  • Z124 St Helens West
  • Z133 Appleton
  • Z132 Warrington south
  • Z148 Runcorn East
  • Z152 Gorsty South
  • Z153 Gorsty North
  • Z157 Northwich West
  • Z159 Smallwood
  • Z158 Northwich East
  • Z161 Winsford
  • Z162 Congleton Cloud
  • Z164 Kelsall
  • Z163 Congleton Mow Cop
  • Z166 Audlem
  • Z167 Malpas and Mouldsworth
  • Z171 Kirkby
  • Z334 Inovyn
  • Z173 Fazakerley
  • Z174 Norris Green
  • Z176 Liverpool CTM 36 inch
  • Z179 Aubery
  • Z178 Liverpool City Centre
  • Z183 Bootle
  • Z184 Toxteth
  • Z185 Mossley
  • Z186 Wavertree
  • Z187 Childwall
  • Z189 Liverpool CTM 40 inch
  • Z188 Huyton East
  • Z190 Liverpool CTM 44 inch
  • Z191 Woolton
  • Z195 Litherland
  • Z196 Crosby
  • Z325 Netherton North
  1. NATURE OF CONTRAVENTION AND ITS CAUSE

Failure to deliver the requirements of a Notice, under regulation 28(4)(b) of the Water Supply (Water Quality) Regulations 2016 (as amended) (“the Regulations”), to mitigate the risks of breaching regulation 4 of the Regulations due to breaches of the standard for Iron and subsequent risk of discolouration in water supplied by Oswestry Treatment Works and the Vyrnwy large diameter trunk main.

  1. Steps to be taken and Delivery date

(a) Existing control measures to be maintained

  1. Planned flow changes to be carried out in line with Calm Network philosophy and operational risk assessments to mitigate impacts on water quality.
    Date: Ongoing for the duration of the Order.
  2. Enhanced monitoring of the Vyrnwy LDTM at strategic points and in the zones supplied.
    Date: Ongoing for the duration of the Order.
  3. Establish a proactive maintenance programme for all tanks and valves on the Vyrnwy system.
    Date: Ongoing for the duration of the Order.

(b) Measures to be delivered

  1. Produce a specific Action Plan, based on previous commitments to clean and refurbish the Vyrnwy LDTM, identifying short and medium-term mitigating steps and identifying the long-term solutions necessary, to address the risk of contravening the requirements of regulation 4 of the Regulations, in respect of the Iron parameter and consumer rejection of the water due to discolouration in zones supplied by Oswestry treatment works and the Vyrnwy LDTM.
    Date: 31 October 2020, but to be kept under review for the duration of the Order.
  2. Implement any additional actions identified in step 3(b)1. which are not already being completed in section 3(a).
    Date: 31 December 2022
  3. Complete planning for the long term solution to mitigate the risks of Iron and discoloured water in zones supplied by Oswestry treatment works and the Vyrnwy LDTM.
    Date: 31 December 2022
  4. Deliver the programme of work identified in step 3(b)3.
    Date: 31 December 2028

(c) Audit Strategy

  1. Define and keep under continuous review an audit strategy to monitor the effectiveness of the above measures.
    Date: 31 October 2020
  2. Implement the audit strategy defined in (c)1.
    Date: For the duration of the Order

(d) Reporting

  1. At regular intervals provide the Inspectorate with reports on progress made with carrying out the steps set out in the Action Plan.
    Date: Bi-annually, on 31 January and 31 July for the duration of the Order.
    Reports to include at least the following details:
    • a. Details of the remedial steps that comprise the programme of work including commencement and completion dates for investigation, planning, etc.
    • b. Current state of progress with the steps referred to in step 3(d)1.a;
    • c. A statement of implications of any slippage of the programme and details of activities planned to bring programme back on target;
    • d. Any revisions to the Action Plan;
    • e. An update on performance in respect of the iron parameter and consumer contacts in the zones listed in this schedule.
  2. Against the following significant milestones;
    • a. Provide a report detailing the audit strategy produced in 3(c)1.
      Date: 30 November 2020 and updated as required.
    • b. Provide a report detailing the Action Plan produced in step 3(b)1.
      Date: 30 November 2020 and updated as required.
    • c. Provide a report detailing the planning for the long-term solution and that work on delivery has commenced (step 3(b)3.).
      Date: 31 January 2023
    • d. Provide a report confirming completion of work (step 3(b)4).
      Date: 31 January 2029
  3. Provide updates to the Inspectorate when the company has any other reason to believe it may not be able to meet any of the key dates set out in this Schedule of Work.
    Date: As required for the duration of the Order.
  4. Submit a completion report to the Inspectorate following the completion of all measures outlined in section 3(b) to demonstrate the benefits of the work.
    Date: 31 January 2030

DATE: 14 September 2020

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