Services-Contract-River Dee Monitoring

This requirement is being let by the Dee Steering Committee (DSC) on behalf of the Water Companies taking potable water from the River Dee. United Utilities, Welsh Water and Severn Trent are the companies who form the DSC.

Requirements include; monitoring of water at specific points in the River Dee, carrying out analysis of samples and providing reporting based on sampling.

The main elements of the contract are as follows:

• The Deesit (Dee Situation Report)
• Intake Protection Stations
• Deepol (Dee Pollution Incident) and Operational Trigger incidents

The Deesit (Dee Situation Report)

The Deesit is the name given to the routine analysis carried out on samples taken from the River Dee.

The Deesit monitoring system requires the Contractor to take twice daily samples from the River Dee, provide analysis of those samples and subsequent reporting. Any evidence of visible pollution, such as discolouration, foaming or dead fish, and an assessment of odour shall be recorded, by the sampling Contractor, at the time of each sampling event. The samples (Deesits 1 and 2) shall be taken by the Contractor such that Deesit sampling events are separated by 12 hours + or - 2 hours. The results from the Deesits 1 and 2 must be available by 13.00 and 20.00 hours respectively. The earliest morning sample should be no earlier than 01:00 at Newbridge and the evening sample should be no earlier than 11:00 at Newbridge. The Contractor is, as well as collecting the Deesit samples, required to operate a UKAS accredited laboratory capable of analysing the samples and of reporting the results to the parties making up the DSC. The location of the laboratory is required to be within 30 minutes of the catchment area, due to strict sampling and reporting turnarounds, and also to react to pollution events as quickly as possible.

Intake Protection Stations

The Contractor will operate a full standby cover system in respect of the IPS. This will operate 24 hours per day, 365 days per year, as part of the monitoring system for IPS. Such a system will deal with instrument failures and incident related alarms. Such standby staff will ascertain the root cause of the alarm and take appropriate action as required.

Following receipt of an alarm by the contractor, remote monitoring and interrogation will be carried out by the Contractor. This could result in a number of possible actions;

a) An immediate site visit. An immediate site visit is defined as arriving at the Intake Protection Station

b) Continuation of monitoring and interrogation.

c) A next day routine site visit.

d) Report on actions and findings

No additional charge whatsoever will be made by the Contractor for remote monitoring and interrogation following receipt of an alarm as it is intrinsic to the service provided.

Contractor must ensure that information from the intake protection stations is made available remotely in real time to the Duty Analyst, Deepol officer and Duty Abstractor to assist in management of incident situations.

Deepol (Dee Pollution Incident) and Operational Trigger incidents

Non-routine analytical and reporting requirements will be carried out by the Contractor in the event of a Deepol. A Deepol is an abbreviation for a River Dee Pollution Incident. The Contractor will also be required to take additional samples on the River Dee in the event of a Deepol in accordance with a sampling strategy devised by the Deepol officer and Duty Abstractor at the time of the incident. The Contractor must maintain capability to take such samples on a 24 hour basis as required with a response time for initiation of sampling of no more than 4 hours.

The Contractor will, in the event of a Deepol, provide a Duty Chemist and a Duty Analyst.

The Contractor's laboratory shall, in the event of a Deepol, be capable of carrying out a variety and number of tests including inorganic analysis outside the scope of the normal Deesit reporting.

The Contractor shall ensure that such tests are capable of being carried out 24 hours per day. If necessary, additional staff and equipment shall be made available to facilitate and analyse for the Deesit as well as a Deepol. Any evidence of visible pollution, such as discolouration, foaming or dead fish and an assessment of odour shall be recorded, by the sampling Contractor, at the time of each sampling event. The Contractor will be expected to provide monthly and annual reports detailing contract performance. Additional information: N/A