United Utilities is seeking supply chain input ahead of going out to tender with an AMP8 framework contract for routine sampling and testing on a number of odour control units at their IED permitted sites with an estimated value of £3 million (inc VAT).

The water company requires services to undertake routine sampling and testing on a number of odour control units at their IED permitted sites.

The assets are subject to sampling for the following activities:

• Characterise the airstream entering the abatement plant.
• Determine the effectiveness of the technology in abating specific compounds.
• Assessment of channelled emissions against emission limit values (ELVs) stated within the permit.
• Emission monitoring at the outlet of each odour control system for flow, odour, hydrogen sulphide, ammonia,
• hydrogen chloride and TVOCs, on a six-monthly basis.
• Process monitoring at the inlet of each stage of treatment for flow, odour, hydrogen sulphide and ammonia, on a six monthly basis.
• Calculation of odour removal efficiency of the system.

All testing must be conducted using the MCERTS methods specified by the permit using MCERTS accredited staff unless otherwise agreed by the Environment Agency. In addition, United Utilities would also like to conduct the following monitoring for internal purposes:-

• TVOCs by PIO using a 10.5eV bulb.
• Methane using a methane specific monitor. voe speciation by GC-MS for odour relevant compounds. Ammonia, hydrogen sulphide, total mercaptans, OMS, HCL using colorimetric detector tubes. The sampling requirement include:-
• Flow - BS EN 15911
• Water vapour - BS EN 14790
• Odour - BS EN 13725 2022
• Hydrogen sulphide -PD CEN/TS 13549
• Detector tubes1 Ammonia - BS EN 150 21877, NIOSH 50151
• Detector tubes1 HCL - BS EN 1911, NIOSH 79031
• Detector tubes1, Fl to BS EN 12519, FID1 and PID1 GCMS - Full scan1
• Methane - Analyser

Current estimated start and end contract dates are 1 April 2026 to 1 April 2031 with further possible extension options up to 1 April 2036.

United Utilities is now inviting interested suppliers with experience in this area to provide at a minimum the following information and submit to the following mailbox: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

• Company name
• Contact details, including location telephone and e-mail address, main point of contact and position in company
• Confirmation of MCERTS and MCERTS Accredited staff

Deadline to respond to this request is 5pm on 24 October – United Utilities expects to issue a formal tender notice on 25 October 2025.

Click here for more information about the engagement process