CEFAS26-85 ITT for provision of Water and Sediment Sampling Analysis for HPC

The BEEMS (British EDF Energy Estuarine and Marine Studies) programme is funded by NNB Generation Company (HPC) Limited. Through this programme, Cefas provide authoritative scientific information on the marine and transitional waters in the vicinity of potential new build nuclear power stations and require the Supplier to deliver the marine sampling, profiling, and laboratory analysis services described in Section 3 below. 3. Contract Duration The Contract implementation will start as soon as possible following contract award with the initial Contract period of 12 months, with the option to extend by up to 4 further periods of 12-months each. 4. Scope of Requirements Cefas require the supplier to acquire sediment and water samples along with water column profiles of conductivity, temperature and depth (CTD) and other variables from a suitable vessel for the purpose of physical and chemical monitoring of the marine offshore environment adjacent to the Hinkley Point C new nuclear build power station. It is anticipated that the required sampling will involve circa 3 days of vessel operations – two days for water sampling and one day for sediment sampling. The requirement includes collection of all samples and field measurements and all laboratory sample analysis, excluding hydrazine analysis which is to be conducted by Cefas laboratory. General Survey Strategy: The marine water and sediment sampling survey will be conducted in Bridgwater Bay adjacent to the Hinkley Point C construction site, in summer 2026, with the potential for continued annual sampling for at least 4 years. Water sampling will be carried out over a full tidal cycle at two main locations detailed in the sections below, with a full day dedicated to each location, requiring a minimum of two survey days. Sediment samples will be collected as detailed below and sampling will be conducted on a separate survey day. Suppliers will propose a survey schedule to fulfil the sampling requirements. The survey sch