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The STATES OF JERSEY has issued a Tender notice for the procurement of a Revised Tender - Concrete Protection to Primary Settlement Tanks & Common Collection Chamber Project, Bellozanne Stw in the Jersey. This Tender notice was published on 08 Jul 2026 and is scheduled to close on 31 Jul 2026, with an estimated Tender value of Refer Document. Interested bidders can access detailed Tender information, eligibility criteria, and complete bidding documents by referencing TOT Ref No. 144718271, while the tender notice number is DN815789 and Registering on the platform.
Procurement Summary
Country: Jersey
Summary: Revised Tender - Concrete Protection to Primary Settlement Tanks & Common Collection Chamber Project, Bellozanne Stw
Deadline: 31 Jul 2026
Posting Date: 08 Jul 2026
Other Information
Notice Type: Tender
TOT Ref.No.: 144718271
Document Ref. No.: DN815789
Competition: ICB
Financier: Self Financed
Purchaser Ownership: Public
Tender Value: Refer Document
CPV Classification
22000000 - Printed matter and related productsPurchaser's Detail
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Login to see detailsTender Details
The construction of the new Bellozanne Sewage Treatment Works (STW) was completed in December 2023 following a phased handover and commissioning. The project replaced the primary, secondary and tertiary treatment systems and refurbished elements of the original infrastructure to increase the storm water storage capacity.
The STW is designed to accommodate flows and loads associated with a population equivalent of 118, 000, with the provision for further 20% increase in capacity. All process structures (tanks, chambers, channels etc) are designed for an 80-year design life.
The works included the construction of three circular precast, post-tensioned concrete Primary Settlement Tanks (PSTs), each with an internal diameter of 28.76m, and a downstream concrete PST Common Collection Chamber of 2.4m diameter. These structures were completed and commissioned early in 2022 and have been in continuous operational since.
Due to the covered configuration of the PSTs, an enclosed atmosphere is maintained to control odour. The environment promotes the accumulation of hydrogen sulphide (H2S), which oxidises and condenses on exposed concrete surfaces above waterline as biogenic sulfuric acid (BSA). This has resulted in early-stage chemical corrosion of exposed concrete surfaces within the PSTs and the PST Common Collection Chamber.
The corrosion is present to varying degrees across the structures. If left untreated, deterioration will continue, leading to a reduct...
Region(s) of supply :United Kingdom
Estimated value :N/A
Publication Date :07/07/2026
Categories :12000000 - Chemicals including Bio Chemicals and Gas Materials
22000000 - Building and Construction Machinery and Accessories
30111500 - Concrete and mortars
72152700 - Concrete installation and repair services
72154000 - Specialty building and trades services
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Last Date of Submission : 31/07/2026 12:00:00
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