Proposed Development The main elements of the proposed development include the following: • lNo 8.0 x 5.Sm diameter (dia) ASP Feed Pump Station (PS) with duty/standby Variable Speed Drives (VSD) submersible 'Dry Weather Flow (DWF)' pumps and duty/assist/standby VSD submersible 'storm' pumps; • 90m x dual buried rising mains between ASP Feed PS and new anoxic selector. 350mm dia. DWF main and 600mm dia. storm main. Each rising main fitted with an electromagnetic flowmeter at the ASP; • 2No above ground 3.Sm deep anoxic selector lanes (total volume 604m3); • lNo high level flow-split chamber with 6No weir penstocks to split flows 67/33 between new and existing ASPs; • lNo 400mm dia x 80m long gravity pipe from ASP flow-split to the modified flow distribution chamber to the existing ASP lanes. • 2No below ground activated sludge aeration lanes (total volume 3,642m3) to treat 67%of the settled effluent using fine bubble diffuser aeration, approximate dimensions 14m (W) x 56m (L); • lNo 6.0m diameter Recirculating Aquaculture System (RAS) Surplus Activated Sludge (SAS) PS with duty/assist/standby VSD submersible RAS pumps and duty/standby SAS pumps. The RAS rising main shall be fitted with an electromagnetic flowmeter at the ASP. The SAS rising main flowmeter is fitted above-ground at the PS. • lNo 60m x 450mm dia RAS rising main from RAS PS to new ASP anoxic zone • lNo 1 lOm x 180mm Outward Diameter (OD) SAS rising main from SAS PS to existing SAS rising main at ASP distribution chamber • lNo 3.0m diameter confluence chamber on existing Final Settlement Tank (FST) feed pipeline; uried pipelines and ducts serving the prop?sed plant; • Concrete roads, footpaths and site finishes to access the proposed plant; • Upgrades to site power supply and distribution systems including uprating of authorised supply capacity and replacement of transformer; • New main site primary distribution switchboard in GRP kiosk, acting as centralised hub to rationalised retained and new distribution circuits; • New ASP MCC in elevated GRP kiosk, serving the feed pumps, blowers, mixers, new FST, new and existing RAS & SAS pumping stations abandoned; The scheme is programmed for a period of 18-20 months beginning in March 2019, subject to planning permission.

D9857: West Huntspill Sewage Treatment Works (STW) Bathing Water Improvements: Environmental Impact Assessment Screening Opinion.