Guestling Green Wastewater Treatment Works - Installation of 1No
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Guestling Green Wastewater Treatment Works - Installation of 1No. Ferric Dosing Kiosk Planning Statement Planning Portal Reference: PP-06377948 September 2017 Guestling Green Wastewater Treatment Works - Installation of 1No. Ferric Dosing Kiosk Planning Statement Planning Portal Reference: PP-06377948 September 2017 Issue and Revision Record Revision Date Originator Approver A September Luke Mosson Les Kelly 2017 MRTPI 1 INTRODUCTION This document is in support of a Planning Application relating to the proposed erection of 1No. Ferric Dosing Plant Kiosk at the existing Guestling Green Wastewater Treatment Works (WTW), Church Lane, Guestling Green, East Sussex, TN35 4HT. This scheme forms part of Southern Waters’ Asset Management Plan 6 (AMP 6) Programme. This is a major programme of refurbishment and upgrading of various existing wastewater treatment works and associated sewer infrastructure required by the water industry regulator OFWAT (Office of Water Services), and the Environment Agency, to be put in place between 2015 and 2020. Each of the schemes must be completed by dates specified by the Environment Agency and OFWAT. 1 2 SCHEME DRIVER Southern Water is to carry out development works at Guestling Green WTW. The development is required to prepare the works to comply with the new Water Framework Directive (WFD) for tighter determinants for Ammonia (5mg/l UT) and Phosphorus (0.5mg/l) to meet the regulatory output dates are in March 2018 and March 2020 respectively. Guestling Green WTW is a conventional filter works in Sussex serving a population equivalent of 1,082. As a sewerage undertaker, Southern Water is obliged to provide the appropriate facilities for the treatment of wastewater to the required standard by the Water Resources Act 1991 and the Urban Wastewater Treatment Regulations 1994. 2 3 CHARACTERISTICS OF THE DEVELOPMENT 3.1 Site Location The proposed development is located within the operational site at Guestling Green Wastewater Treatment Works (WTW), Church Lane, Guestling Green, East Sussex, TN35 4HT. Guestling Green WTW is located in a rural location approximately 0.6km north east of the Guestling Green itself. The site is accessed from Church Lane via a single track road owned by Southern Water (SWS). The context of the site can seen below in Figure 1. Figure 1: Map showing the context of the site [Extract from GoogleMaps]. The majority of the site consists of short mown grassland, scrubland, concrete structures including inlet works, dosing plant, primary settlement, trickling filters, 3 humus tanks, clarifiyer tanks, sand filters, sludge beds and associated control buildings and areas of hard standing. The nearest properties to the site are located on Church Lane to the south west of the site, some 200m away. The site is surrounded by a mixture of agricultural land and woodland. A mature tree line and dense woodland lies to the north, east and south of the site, this area being classified as ancient woodland. A further band of hedgerow and trees lines the western boundary and provides screening of the site from Church Lane, beyond this lies agricultural land. The proposed development will be located entirely within the confines of the existing operational site. The site falls within the local authority area of Rother District Council. In planning terms the site falls outside of any settlement boundary and within the countryside. 3.2 Existing WTW development The existing WTW serves Guestling Green and surrounding area, serving a population of approximately 1,082. The wider WTW has an area of approximately 0.45ha and currently includes the following operational infrastructure: · inlet works · dosing plant · primary settlement · trickling filters · humus tanks · clarifiyer tanks · sand filters · sludge beds · control buildings 4 3.3 Extent of Proposed Development The works proposed will allow for necessary upgrades to be made to the existing works to ensure that the site can continue to operate effectively and meet the regulatory outputs required to ensure compliance with levels of Phosphorus and Ammonia. The following works are proposed (shown on drawing JN.639170.0Z0703): 1. Install new dosing kiosk 2. Installation of interceptor chamber 3. Installation of 2No. flow control chambers 4. Installation of air scour blower 5. Installation of lamella 6. Installation of MCC kiosk 7. Installation of emergency shower and eye bath A temporary compound area will be created during the construction period, this will allow for the appropriate storage of materials and parking of vehicles during the construction phase. This will constructed on an existing area of hardstanding. The area will be returned to its existing condition upon completion of temporary construction activities. 3.4 Requirement for EIA Screening It is considered that the proposed works do not constitute schedule 1 development. The proposed development area of the development falls below the size threshold of 1000m2 where in accordance with Paragraph 11 (c) of Schedule 2 of the Town and Country Planning (Environmental Impact Assessment (EIA) Regulations (2011). A preliminary assessment has been conducted by a qualified ecologist, which has not highlighted any significant issues. They have provided a range of basic advice to be followed during construction. 5 An assessment of the construction phase in terms of vehicle movements has also been undertaken, which concluded that the number of movements are relatively low and only temporary in nature and will be effectively managed. It is not considered that either of these aspects will have any significant temporary or permanent environmental impacts on the site or surrounding area. The proposed kiosk has been positioned, as far as technically possible, adjacent to existing structures and in a position which is well screened from wider view. This will assist in reducing the visual impact on the views into the site, which are considered to be limited. The proposed development is not considered to have any significant effects on the environment by virtue of the proposals size, very limited increase in built form and given its nature, location and the existing use of the land. Due to the relatively minor nature of the works within a large operational wastewater treatment works, it is assessed that the proposed development would not be classed as EIA development. 3.5 Planning Requirement Table 1 lists the proposed new structures and development and provides details of their external material and finish. The development of the dosing kiosk will require planning permission as an above ground structure, which can be interpreted as buildings and being over 29 cubic meters in volume. As the other parts of the permanent development are on operational land and fall within the necessary parameters, they benefit from Southern Water’s Permitted Development rights as a Statutory Undertaker and do not therefore require planning permission. The kiosk will be constructed in Glass Reinforced Plastic (GRP) coloured dark green to BS 4800 ref. 14C39. 6 3.6 Permitted Development It is assessed that the rest of the works required constitute Permitted Development under the Town and Country Planning (General Permitted Development) (England) Order 2015 (GPDO). The following works fall under the GPDO: 1. Installation of interceptor chamber 2. Installation of 2No. flow control chambers 3. Installation of air scour blower 4. Installation of lamella 5. Installation of MCC kiosk 6. Installation of emergency shower and eye bath 7. Formation of hardstanding A temporary contractor’s compound is required for the duration of the construction period and will consist of site cabins, material storage areas and welfare and storage facilities. The compound will cover an area of approximately 570m2 and will be set up on an area of agricultural land adjoining the site. It is considered that the compound is Permitted Development under Class A of Part 4 (Temporary Buildings and Uses) of Schedule 2 of the Town and Country Planning GPDO (2015) which states that: “The provision on land of buildings, moveable structures, works, plant or machinery required temporarily in connection with and for the duration of operations being or to be carried out on, in, under or over that land or on land adjoining that land.” All other works will fall under Part 13 Water and Sewerage Class B development by or on behalf of sewerage undertakers, paragraph f of Schedule 2 of the GDPO which states: “any other development in, on, over or under their operational land, other than the provision of a building but including the extension or alteration of a building.” 7 Table 1: Proposed items for the Guestling Green WTW development Height (m) Foundation Planning (Above Item Item of Width Length Depth Description Requirement Local Material Finish No. Development (m) (m) (approx) Ground (m) Level) Dosing Kiosk to provide Glass Holly Planning storage, electrical control Reinforced Green 1 Dosing Kiosk Permission 3 3.7 7.1 1 equipment and dosing Plastic 14C39 to Required equipment. (GRP) BS4800 Interceptor Surface water / chemical Permitted 2 0.2 3 3 Concrete Unfinished 1 Chamber capture from delivery area. Development Metal Exposed Shower and Emergency shower and eye Permitted structure metal. 3 3.5 1 1 0.5 eye bath bath Development with GRP Various surround GRP. Glass Holly Electric control equipment Permitted Reinforced Green 4 MCC Kiosk 2.5 2 1 1 for Development Plastic 14C39 to (GRP) BS4800 Stainless Permitted Steel Tanks 5 Lamella Phosphorus removal 5.5 7 8 Unfinished 1 Development with GRP flooring Flow Control Permitted 6 Control for recirculation flow 0.2 2 3 Concrete Unfinished 1.5 Chambers Development Glass Holly Air mixing at chemical Permitted Reinforced Green 7 Air Blowers 1 1 2 1 dosing Development Plastic 14C39 to (GRP) BS4800 The compound will consist of Temporary cabins for contractor’s Permitted The compound area will take up an area of approximately 570m2 within the WTW 8 Contractors welfare facilities, storage Development boundary located to the north of the proposed development.