RFT260109 Rolleston WTP and WWTP Chlorination Systems

Summary and scope

Central Highlands Regional Council (CHRC) is seeking new gas chlorination systems at Rolleston WTP, Rolleston WWTP, Dame St WTP Springsure and Twin Tanks WTP Springsure. The works are divided into four (4) Separable Portions, with the requirements and price for each site identified separately. The chlorination packages will differ in size, capacity, operating requirements and site arrangements. Each Separable Portion will have its own design and performance specification. Tenderers must assess each site individually. 3.1 Purpose of the early tender release Council is releasing this RFT while the site designs are progressing. The 50% design for Rolleston WTP is included with the initial release. This early release gives suppliers time to understand the project, prepare their tender approach, begin consultation with manufacturers and specialist subcontractors, and get ready for the remaining Separable Portions. Tenderers should use this period to explore suitable equipment options, confirm manufacturing capacity and delivery lead times, and identify matters requiring clarification from Council. 3.2 Progressive issue of design packages The remaining site designs and performance specifications will be released by formal addenda over the next three to four weeks following the initial RFT release. Further information or revisions for Rolleston WTP may also be issued during this period. A table shows indicative availability targets. Council will confirm releases and any revised dates through addenda. 3.3 Staged delivery at Rolleston WTP The Rolleston WTP chlorination works form part of a wider treatment plant upgrade that will be delivered in stages. The package includes pre-chlorination and post-chlorination within Separable Portion One (1). Installation of the new chlorination facility must be coordinated with the clear water tank works, associated pipework and other upgrade activities. Some installation work may be completed before the new tank and pipework arrangements are ready for connection. Final connections, commissioning and transfer to the new chlorination system must therefore be planned around the readiness of the wider plant upgrade. The existing disinfection system must remain available until Council authorizes the changeover and the new arrangements are ready to operate safely. Tenderers must allow for coordination with Council operations and other contractors, staged access, and a planned changeover that maintains treatment. The detailed staging requirements and interfaces will be provided with the Rolleston WTP design information and subsequent addenda.