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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan Prepared on behalf of Manx Utilities Final Report 10 December 2024 3096-1A

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Ecological Planning & Research Ltd The Barn, Micheldever Station, Winchester, Hampshire SO21 3AR t. 01962 794720 e. [email protected] w. www.epr.uk.com Company registration number: 8592380

RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan

Report Release Sheet

Draft/Final: Final Report

Issue Number: 3096-1A

Date: 10 December 2024

Client: Manx Utilities

PO Box 177

Douglas

Isle of Man

IM99 1PS

Main Author(s): Hannah Corrigan BSc (Hons), PGCert

Contributors/Surveyors: Hannah Corrigan BSc (Hons), PGCert

Report Prepared for Issue by: …………………………………

Hannah Corrigan BSc (Hons), PGCer

Report Approved for Issue by: …………………………………

Barney Scott BSc (Hons) MSc CEnv MCIEEM

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan

Contents 1. INTRODUCTION ........................................................................................................ 5 Project Description................................................................................................. 5 Aims and objectives ............................................................................................... 5 2. DESCRIPTION OF EXISTING LANDSCAPE AND ECOLOGICAL FEATURES ......... 6 Habitats and vegetation ......................................................................................... 6 Protected or Notable Species ................................................................................ 6 3. MITIGATION .............................................................................................................. 7 Mechanisms for Implementing and Securing Mitigation ......................................... 7 Mitigation in the Site Clearance and Construction Phase ....................................... 8 Mitigation in the Operational Phase ..................................................................... 11 4. MANAGEMENT AIMS AND OBJECTIVES .............................................................. 13 Overarching Ecological Management Aims and Objectives ................................. 13 Timetable for implementation ............................................................................... 13 5. PRESCRIPTIONS FOR MANAGEMENT AND MAINTENANCE ACTIONS ............. 14 Prescriptions ........................................................................................................ 14 Objective 1 – Creation, management and enhancement of hedgebanks and mixed scrub for the benefit of biodiversity and local culture .......................... 14 Objective 2 –Protect and enhance retained trees for the benefit of local biodiversity. ......................................................................................................... 16 Objective 3 - Enhancement and management of retained grasslands for the benefit of biodiversity ..................................................................................... 17 Objective 4: Provide mitigation, compensation, and enhancement for Fungi ................................................................................................................... 18 Objective 5 - Provide mitigation, compensation and enhancements for protected/ notable species through provision of bird and bat boxes ..................... 19 6. REFERENCES......................................................................................................... 20

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

4

MAPS Map 1 Fungi Survey Results Map 2 Bird and Bat Box Locations

APPENDICES Appendix 1 Legislation

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

5 RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan

INTRODUCTION Project Description 1.1 Construction of Peel Sewage Treatment Works (STW) (hereafter referred to as ‘the STW’) is required for first-time sewage treatment in the Peel catchment to improve water quality and ensure that the water in Peel Bay achieves a ‘good’ water quality standard. 1.2 The STW will be located on land West of the Glenfaba Road, Peel (the ‘Site’) with a new access to be constructed from the A27 to the east of the Site. The construction works and equipment to be installed include up to nine Integrated Rotating Biological Contactor (IRNC) units, screens and UV plant together with associated buildings. The STW will also treat untreated sewage piped from a pumping station on the Promenade in Peel, and there will be a new outlet pipeline to the River Neb. 1.3 The STW application site is situated at the southern edge of the urban area of Peel with mixed uses adjacent to it. It is in agricultural use with a partial woodland fringe, and it generally slopes down from the Glenfarba Road to the west where the mill race, Heritage Trail and River Neb lie. Aims and objectives 1.4 The purpose of this Landscape and Ecological Mitigation and Management Plan (LEMMP) is to detail how habitats and other ecological enhancements will be managed and maintained in the long-term. In addition, these measures will also avoid, minimise and mitigate effects to Important Ecological Features (IEFs). This is in support of Planning Condition 4, that requires the following: “No development shall take place, including works of site clearance and ground preparation, until a scheme, including a timetable for implementation, for the enhancement of biodiversity on the site, in accordance with the mitigation measures set out at Section 4.5 of Volume 1 of the Environmental Statement, has been submitted to and approved in writing by the Department. The scheme shall include details of an ongoing management scheme for the grassland areas and a bat and bird box plan. Development shall be carried out in accordance with the approved details.”

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

6 2. DESCRIPTION OF EXISTING LANDSCAPE AND ECOLOGICAL FEATURES Habitats and vegetation 2.1 The Site is an irregular shaped parcel in the River Neb floodplain near its mouth at Peel Bay on the west coast of the Isle of Man. It comprises of three agricultural grassland fields separated by a scrub embankment and hedgebanks. The eastern boundary is marked by vegetation along the Glenfaba Road (A27) and its hedgebank verge. 2.2 The western boundary runs along the fields meeting the 'Heritage Trail' public right of way, with a narrow grass verge. To the south of the site there is a broadleaved woodland just outside the red line boundary. 2.3 Key habitats around the Site include the River Neb corridor with its riparian woodland and wetland habitats, located within 50m of the western boundary. The West Coast Marine Nature Reserve (MNR) begins at the river mouth, directly adjacent to the northern end of the red line boundary. 2.4 There are no Areas of Special Scientific Interest (ASSI) within 2km of the Site (EWW, 2024). Protected or Notable Species 2.5 The Site was surveyed for several protected species in 2023: bats, breeding birds, reptiles and amphibians. Bats 2.6 Bat species recorded were mostly Pipistrelle species Pipistrellus sp. and Leisler’s Bat Nyctalus leisleri, that are predominantly edge and open habitat feeders. Breeding Birds 2.7 Overall, the Site contains relatively small areas of suitable nesting and foraging habitat to birds. These habitats include hedgebanks, bracken scrub and grassland. The breeding bird surveys recorded a low diversity of bird species and low numbers of territories. Reptiles 2.8 Overall, the Site contains relatively small areas of suitable reptile habitat. Most of the Site is unsuitable for reptiles due to the intensively managed arable grassland. Most of the suitable quality reptile habitat is restricted to the boundaries; although there are some isolated areas of rougher grassland. These areas of suitable habitat are unlikely to support significant reptile populations, as highlighted by the survey results.

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

7 3. MITIGATION 3.1 This section describes measures that will be adopted to avoid or mitigate significant negative impacts upon important ecological features. 3.2 In some cases, mitigation measures are prescribed even where effects are predicted to be significant at less than the Local level. This is either to avoid the potential for committing a legal offence or to demonstrate the ability of the proposals to deliver a 'net gain’ in biodiversity as required by planning policy. Mechanisms for Implementing and Securing Mitigation 3.3 Throughout this section reference is made to a suite of plans that will include and expand upon the key principles of the impact avoidance and mitigation measures described below. These plans can be secured through planning conditions or obligations for each phase of development. Construction Plans 3.4 Construction Plans set out detailed measures for protecting the environment during the Site clearance and construction phases. Specific to this project, these are to be secured by conditions described in Table 3.1. Table 3.1: Construction plans that detail protective measures to the environment during construction Condition reference Type Condition wording C3 Biodiversity Mitigation Plan A scheme detailing measures for the protection of the following features during the construction process has been submitted to and approved in writing by the Department: i) Trees along the southern edge of the site; ii) Trees in the vicinity of the new surface water outfall on the western site boundary; iii) Retained sod banks to the east and west of the site; and iv) Field 311836 (outside of the road area). Development shall be carried out in accordance with the approved scheme, with the agreed protection measures to remain in place for the duration of the construction period. C6 Construction Waste Management Plan The Plan shall identify the main waste materials expected to be generated during the construction phase, together with measures for dealing with such materials so as to minimise waste and maximise re-use and recycling. Development shall be carried out in accordance with the approved Plan. C7 Scheme for the mitigation of dust nuisance A scheme for the mitigation of dust nuisance during the construction period has been submitted to and approved in writing by the Department. Development shall be carried out in accordance with the approved Plan. C8 Silt Management Plan, surface The details to be submitted, which relate to the construction period, shall include:

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

8 Condition reference Type Condition wording water runoff scheme and storage management i) a silt management plan; ii) measures to control the storage, handling and disposal of polluting material; iii) construction of a sustainable drainage system or filtering of silt laden run-off; and iv) measures to ensure that work to existing surface water features does not case erosion. C9 Drainage Details of surface water drainage works shall be submitted to and approved in writing by the Department. The details to be submitted, which shall accord with the principles set out in the drainage strategy at Section 8.2 of Volume 3 of the Environmental Statement, shall: i) provide information about the design storm period and intensity, the method employed to delay and control the surface water discharged from the site and the measures taken to prevent pollution of the receiving groundwater and/or surface waters; ii) include a timetable for implementation; and iii) provide a surface water management and maintenance plan for the lifetime of the development. Development shall be carried out in accordance with the approved details.

Landscape and Ecological Mitigation and Management Plan 3.5 This LEMMP sets out details of the delivery of biodiversity enhancements and mitigation measures, including monitoring requirements, habitat creation and the governing principles of ongoing habitat management. It also provides detailed prescriptions for the ongoing management of open space within the proposed development. Mitigation in the Site Clearance and Construction Phase 3.6 This section describes measures that will be adopted to avoid or mitigate significant negative impacts upon IEFs and should be read in conjunction with Peel Sewage Treatment Works Biodiversity Mitigation Plan (3096 -1B) and Precautionary Working Method Statement (PWMS). West Coast MNR and non-statutory designated sites 3.7 West Coast Marine Nature Reserve (MMR) and non-statutory designated sites will be protected from impacts associated with construction activities by the establishment and maintenance of appropriate exclusion areas and pollution prevention measures that follow construction methods in accordance with industry standards that minimise the risk of pollution. Refer to the Biodiversity Mitigation Plan (BMP) for additional information.

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

9 Hedgebank 3.8 A total of 182m of hedgebank (Manx sod hedge) located at the eastern boundary of the Site will be removed and reinstated to a revised profile at the eastern boundary and south-east side of entrance to new access road. An additional planting of 115m of hedgebank on the northern side of the entrance to the new access road with be planted (refer to Proposed Landscape Plan 10057112-ARC-XX-XX-DR-T-0613). Mixed scrub will also be planted behind these hedgebanks, refer below. 3.9 A total of 95m of hedgebank is to be removed between fields 311835 and 311875 during the construction phase, and to be reinstated on completion (refer to Proposed Landscape Plan 10057112-ARC-XX-XX-DR-T-0613). This will result in the temporary loss of nesting habitat for birds and sheltering / feeding sites for Common Lizard Zootoca vivipara, and for other non- protected fauna. 3.10 A total of 335m of bolster planting along the western hedgebank will increase connectivity and species diversity of flora and improve the quality of habitat for species such as Common Lizard. 3.11 Reinstatement will be completed at end of the construction phase using low fertility substrate and sown with locally native grassland species topped with mixed scrub for maximum benefit of invertebrates, birds and Common Lizard, refer to Section 5 for maintenance and management details. Mixed scrub 3.12 Two patches of mixed scrub (0.2ha) will be created behind the eastern hedgebanks. This will increase the availability of shelter for reptiles and amphibians and nesting and foraging opportunities for breeding birds. Trees 3.13 The new outfall pipe that will carry rainfall runoff beneath PROW 362 (Heritage Trail) and mill leat to the River Neb will pass through an area of established tree cover on the east bank of the river. An arboricultural survey completed by Manx Roots in early October 2023 in conjunction with the siting of the proposed outfall pipe confirmed: • The proposed routing of the pipe from the edge of the main Site (East of the Heritage Trail) to the River Neb is likely to miss the existing trees and be outside of the calculated root protection areas (BS5837:2012). • The red line boundary includes a 7.5m corridor through the area of established tree cover for construction of the outfall pipe. The construction partner has confirmed they can construct the pipeline within this corridor with no trees to be removed. 3.14 All tree work is to be undertaken in accordance with the BMP, PWMS, Arboricultural Impact Assessment Arboricultural Method Statement and Tree Protection Plan Retention and enhancement of as many key habitat features as possible. Neutral Grassland 3.15 A total of 2.57 ha (1.41ha field 311785, 0.4ha field 311835, and 0.76ha field 311836) of other neutral grassland is to be retained and enhanced into good condition, offsetting the loss of the existing moderate condition neutral grassland totalling.

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

10 3.16 Enhancement of the grassland habitat will aim to create a diverse sward of varying heights to improve the quality of habitats for invertebrates, birds, amphibians, reptiles and bats. The design will include the following: • Enhancement of existing species-poor grassland into native species-rich grassland, using green hay or supplementary seeding to increase species diversity. • Seeding mix to be chosen with consultation with Ecologist. • Establishment of a management regime to include mowing to encourage the development of a species-rich grassland/wildflower meadow with a range of grass lengths and diverse sward structures to benefit invertebrates, with areas of low and open sward for ground feeding birds.

3.17 Refer to Section 5 for maintenance and management details. Fungi 3.18 The fungi survey was completed by Emma Williams, a specialist field mycologist from Coal Spoil Fungi Ltd, on 23rd September 2024 and 24th September 2024. 3.19 All Fungi encountered were assessed and collected to determine the fungal value of the Site. This involved: • Identification of fungi by eye in short turf and sward; • hand searching through areas with higher sward, bracken cover, tree lines, tree trunks/branches, and ditches; • overturning of logs and checking in and around water lines, bogs and seasonal ponds; and • checking flora for Rusts, Smuts, Molds and Mildews.

3.20 The fungi diversity at Location 1, as shown in Map 1, is relatively low. Location 2 exhibits a greater diversity of fungi compared to Location 1, while Location 3 supports the highest fungi diversity on Site. All areas outside of these locations are of negligible fungi value. 3.21 Wherever reasonably practicable, measures will be implemented to protect fungi, while efforts will be made to enhance the surrounding grassland to promote greater fungal growth and biodiversity across the wider grassland. Breeding Birds 3.22 Refer to BMP and PWMS for mitigation details to avoid harm to individual birds and destruction of bird nests during the construction period. Nesting Habitat 3.23 There will be temporary loss of nesting habitat resulting from loss of the eastern and northern hedgebanks. Reinstatement and creation of new hedgebanks will in time create a net increase in nesting habitat. 3.24 In addition, bird nesting boxes will be installed on mature trees within the woodland to the south of the Site to immediately increase the nesting resource available to birds. Refer to Section 5 for maintenance and management details.

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

11 Foraging Habitat 3.25 Foraging and breeding enhancements for birds will be through the reinstatement and creation of new hedgerows, scrub and nest boxes. 3.26 Post construction, the restoration of hedgebanks, scrub and improved management of grassland will lead to a net increase in suitable habitat for nesting and foragin birds. Bats 3.27 Refer to BMP and PWMS for mitigation details to avoid harm to individual bats and destruction of bat roosts during the construction period. Roosting Habitat 3.28 No bat roosts or trees of roosting suitability for bats were recorded by the ecology surveys. However, to enhance the Site for bats, bat boxes will be installed to mature trees within the woodland to the south of the Site. Habitat Fragmentation 3.29 The features within the Site that have the most potential to be used by bats for commuting are the hedgebanks and bracken and scrub escarpment habitat. Again, there will be temporary loss of these habitats. However, reinstatement and creation of new hedgebanks will in time create a net increase in foraging habitat to bats. 3.30 Refer to Section 5 for maintenance and management details. Reptiles and Amphibians 3.31 Refer to BMP and PWMS for mitigation details to avoid harm reptiles and amphibians during the construction period. Foraging, commuting and resting habitat 3.32 Reinstatement and creation of new hedgebanks will in time create a net increase in foraging, commuting and resting habitat to reptiles and amphibians. 3.33 In addition, grassland enhancement will also increase the quality and amount of foraging habitat available to reptiles. 3.34 Refer to Section 5 for maintenance and management details. Mitigation in the Operational Phase West Coast MNR and non-statutory designated sites 3.35 Structural failure of installations or pipework could lead to a sewage release, and this could result in a significant adverse effect on adjacent watercourses (i.e. the mill leat and River Neb) and the marine environment (including the West Coast MNR). The following mitigation has been designed to prevent this as follows: • Construction methods will be sound and in accordance with industry standards, minimising the risk of a pollution event occurring. • Process flows will be monitored and there will be leakage detection on the connecting rising main from the promenade. If a release were to occur, the works would be shut down.

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

12 • Operational procedures will include an emergency ‘clean up’ plan in agreement with the DEFA EPU should a pollution event occur. Bats 3.36 There will be no permanent lighting of the sewage treatment works or access road. Lighting used will follow Bat Conservation Trust Guidance (2023) including, for example, use of warm white light sources (2700 Kelvin or lower), no use of light sources with peak wavelengths higher than 550nm to avoid the component of light most disturbing to bats, and mitigation by natural buffering (use of trees and shrubs for attenuation). Breeding Birds 3.37 Structures can act as obstructions to bats and birds. However, the main treatment plan area will comprise mainly low-lying structures (up to 6.72m high). Structures of this height are unlikely obstruct bats and birds and, on this basis, this risk is not considered further.

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

13 4. MANAGEMENT AIMS AND OBJECTIVES Overarching Ecological Management Aims and Objectives 4.1 The principal landscaping aim for the Peel SWT LEMMP is to ensure mitigation, compensation and enhancement measures detailed within the Environmental Statement (ES) and supporting Technical Appendices (TA’s) are implemented. This will be achieved through the following ecological objectives: • Objective 1 – To create, manage and enhance hedgebanks and mixed scrub for the benefit of biodiversity and local culture • Objective 2 – To protect and enhance retained trees for the benefit of local biodiversity • Objective 3 – To enhance and manage retained grasslands for the benefit of biodiversity • Objective 4 – To mitigate, compensate and enhance habitat for fungi • Objective 5 – To mitigate, compensate and enhance habitat for protected/ notable species through provision of bird and bat boxes Timetable for implementation Table 4.1: Key dates for implementation based on construction start date of February 2025 Activity Start date End date Comment Bolster Planting 03/02/2025 31/03/2025 Preconstruction to provide alternative nesting and foraging opportunities. Bird and bat box installation 03/02/2025 31/03/2025 Preconstruction to provide alternative nesting and roost opportunities. Removal of hedgebanks 3/02/2025 31/03/2025 Start date is weather dependant (3-5 days above 5°C overnight) to determine hibernation season. Reinstatement of eastern hedgebanks 01/03/2026 31/03/2026 Post construction of access road to avoid harm to protected species. Tree planting and reinstatement of hedgebanks around SWT 01/11/2027 31/03/2028 Post construction of SWT to avoid harm to protected species.

Table 4.2: Gantt Chart showing optimal windows for complete biodiversity enhancements

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Grassland cut

Sowing seeds

Tree/shrub/hedge planting

Hedgerow cut

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

14 5. PRESCRIPTIONS FOR MANAGEMENT AND MAINTENANCE ACTIONS 5.1 This section provides prescriptions and methodologies for the set up and ongoing management and maintenance of the habitats within the Site, allowing the management objectives stated within Section 4 to be achieved. This section should be read in conjunction with Landscape Plan 10057112-ARC-XX-XX-DR-T-0613. Prescriptions 5.2 To achieve the proposed creation and management aims and objectives, existing habitats need to be protected and enhanced, and new habitats created. This will be achieved through the following measures. Objective 1 – Creation, management and enhancement of hedgebanks and mixed scrub for the benefit of biodiversity and local culture 5.3 Any hedgebank removed during the construction phase will be reinstated and increased in total length. Thereby resulting in a net increase in the total length of hedgebank. 5.4 Mixed scrub will be planted at the eastern boundary of the Site. This is to increase the diversity of habitats supported on Site and to provide additional screening at the eastern boundary behind the hedgebanks. 5.5 Planting is to be consistent with the local area flora, and appropriate management is put in place. Implementation 5.6 Four sections of hedgebanks are to created or reinstated, totalling 392 in length. See Proposed Landscape Plan 10057112-ARC-XX-XX-DR-T-0613 for locations. 5.7 Banks are to be created in line with traditional local style using mounded low fertility substrate – typically over a field rubble interior - faced with a grassland component topped with shrubs (see planting list below). Bank dimensions 91.44cm high x 182.88 cm wide as per The Isle of Man Planning Scheme (Development Plan) Order 1982. 5.8 Existing soil from the Site should be re-used wherever possible to minimise loss of soil-based invertebrates and the native seedbank. The bank will be seeded with a suitable native seed mix of neutral soils. 5.9 Seed mixes will be sourced from a reputable conservation supplier where seeds are obtained from Isle of Man specialist growers. Refer to 5.12 Plant List below. 5.10 The following method will be applied: • Seed mix preparation – seeds will be mixed with sand to allow of easier sowing. • Sowing rate - pure wildflower mix sown at about 2g per sq m, and a wildflower-and- grass mix at 5g per sq m. • Firm down the seeds – seeds will be lightly pressed into the soil to ensure germination. • Seed protection from birds – seeded areas will be protected using fleece.

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

15 5.11 Hedge planting will be carried out between November to March. Hedge spacing will following a staggered pattern as shown in Figure 5.1 below. Figure 5.1: Hedge spacing

5.12 Planting List: Woody species: Blackthorn Prunus spinosa Burnet Rose Rosa pimpinellifolia Crab Apple Malus sylvestris Eared Willow Salix aurita Elder Sambucus nigra Hawthorn Crataegus monogyna European Gorse Ulex europeaus

Grasses and herb species: Barren Strawberry Potentilla sterilis Bluebell Hyacinthoides non-scripta Cat's Ear Hypochaeris radicata Cock's foot Dactylis glomerata Common Bent Agrostis capillaris Field Scabious Knautia arvensis Foxglove Digitalis purpurea Hart's Tongue Asplenium scolopendrium Red Fescue Festuca rubra Sheep's-bit Jasione montana Tormentil Potentilla erecta Western Polypody Polypodium interjectum Yorkshire fog Holcus lanatus

5.13 A total of 0.2ha of mixed scrub at the eastern boundary will also be planted at the eastern boundary. The following methods will be applied: • Diverse range of species selected from the planting list above. • A minimum of 3 native woody species will be planted. • No single species will be planted more than 75% of cover. • Spacing will be 1 plant per m2. • Clearings and glades will be maintained within the scrub creating a grassland scrub mosaic. • Tree guards will be used for newly planted shrubs to protect them from herbivore damage.

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

16 5.14 The planting list will be checked with the project ecologist to ensure that native species suitable to the soil are selected. 5.15 Strict biosecurity measures will be in place when procuring and planting off-site sources of plants. Seedlings will first be sourced from an Isle of Man sourced and grown, reputable, conservation-orientated nurseries with strict transplant biosecurity policies. 5.16 If this is not possible, seedlings will either be sourced directly from the Woodland Trust shop or from nurseries that that have the ‘UK and Reland Sourced and Grown (UKISG) Woodland Trust assurance scheme’. Reputable nurseries can be found on their website: https://www.woodlandtrust.org.uk/about-us/what-we-do/we-plant-trees/uk-sourced-and-grown- scheme/ Maintenance 5.17 Where necessary, plants should be watered to ensure healthy growth and establishment. 5.18 Check condition of stakes, ties and guards and repair as necessary, until shrubs are established. 5.19 After a five-year establishment period, hedges should be cut in rotation every 2-3 years to ensure that suitable habitat for wildlife which relies on uncut hedges and will allow increased provision of flowers and berries and habitat for nesting birds, and benefits slow growing species such as hawthorn (DEFA, 2010). 5.20 Hedge cutting can take place between the 1st of September and the end of February. It is recommended that hedges are cut in January/February to ensure that berries etc can be used by wild birds. 5.21 The banks (under hedges) should be cut, in rotation as above, between 1st September and 31st March. Banks are important basking sites for reptiles and a diverse flora will support an increased invertebrate community. 5.22 Hedge should not be cut to lower than 1.5m above bank, and 1.5m in width. 5.23 Any gaps (due to failure of plants) should be replanted during the period November to March. 5.24 Ensure no disturbance of ground within at least 1m of the hedgebank base. 5.25 Regular removal of all rubbish / debris from hedgebanks and field margins. Objective 2 –Protect and enhance retained trees for the benefit of local biodiversity. 5.26 To enhance the diversity and ecological value of the Site, a new belt of trees will be created bordering the east, south and west faces of the sewage treatment works. 5.27 The area to the south of field 311836 is a Registered Tree Area (RA0531) and all work should be informed by the Arboricultural Impact Assessment, Method Statement and Tree Protection Plan. This will include construction exclusion zones and root protection areas. Implementation 5.28 A tree line is to be planted to the east, south and west of the STW in field 311835 (see Proposed Landscape Plan for location). This is to comprise: 60%: Sessile Oak Quercus petraea

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

17 Remaining 40%: Crab Apple Malus sylvestris Alder Alnus glutinosa Downy Birch Betula pubescens ssp tortuosa Eared Willow Salix aurita Aspen Populus tremula 5.29 All planting of bare root stock to be carried out November to March with no planting during poor weather conditions. 5.30 Cut existing grass short (10cm) before planting 2m apart in a square pit following guidelines in Landscape Plan. 5.31 Trees to be planted in pits to fully accommodate root systems, with subsoil broken up to a depth of 15cm below the base of the pit. 5.32 On planting, loosen roots and place root ball in centre. Backfill with excavated topsoil with compost and add 50mm of mulch. 5.33 Trees to be secured in position using straight, round timber stakes (top diameter 10cm), protected with biodegradable tubex 12D shelters, driven into the ground to a minimum depth of 30cm. Stakes to be positioned off-centre on the prevailing wind side of the tree. 5.34 The aim is to ensure that in 30 years the tree canopy will be continuous with no more than 10% of gaps in canopy and no individual gaps more than 5m wide. 5.35 All plantings will be checked with the project ecologist to ensure that native species suitable to the soil are selected. Strict biosecurity measures will be in place when procuring and planting off-site sources of plants, as per paragraph 5.14 and 5.15. Maintenance 5.36 Where necessary, plants should be watered to ensure healthy growth and establishment for at least three years from planting. 5.37 Check condition of stakes, ties and guards and repair as necessary, until shrubs are established. 5.38 A 6m protection buffer is to be maintained from trunk on both sides of the treeline. Objective 3 - Enhancement and management of retained grasslands for the benefit of biodiversity Implementation – Field 311785 5.39 Field 311785 will be used for machinery and material storage during the construction phase. 5.40 Topsoil will be excavated at the beginning of construction and stockpiled at the northern end of field 311785 (see EWW, 2024). The stockpile should be covered during storage to ensure it remains suitable for reinstatement. 5.41 At the end of the construction phase, the stored topsoil will be reinstated, and the field sown with an appropriate neutral grassland seed mix (refer to paragraphs 5.9 and 5.10) containing species as follows: Cat's Ear Hypochaeris radicata

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

18 Cock's foot Dactylis glomerata Common Bent Agrostis capillaris Common Sorrel Rumex acetosa Creeping Buttercup Ranunculus repens Field Scabious Knautia arvensis Lesser Celandine Ficaria verna Meadow buttercup Ranunculus acris Meadowsweet Filipendula ulmaria Ragged Robin Silene flos-cuculi Red Fescue Festuca rubra Sheep's-bit Jasione montana Tormentil Potentilla erecta Yorkshire fog Holcus lanatus Maintenance – all fields 5.42 Following establishment of the sown grassland in 311785 (one year after sowing) and throughout for 311835 and 311836, fields will be cut twice annually in spring and late-autumn. 5.43 Mowing large areas of grassland at once creates a uniform habitat structure, and removes all floral resources simultaneously (Morris 2000). Therefore, in any one year, approximately 25% of the field should be left uncut (either as ‘islands’ or at the margins) to allow establishment of seed bank and provide refuges for invertebrates to recolonise mown areas. Objective 4: Provide mitigation, compensation, and enhancement for Fungi 5.44 At the end of the construction phase field 311785 will be enhanced to provide better conditions for fungi, refer to Map 1 for fungi locations. Implementation 5.45 At Location 3, every effort will be made to preserve the soil and minimise disturbance as much as reasonably possible. Where it is feasible to leave soil undisturbed, these will be safeguarded from construction activities by installing fencing that prohibits access to machinery and storage. Maintenance 5.46 Locations 2 and 3 will suffer fungi loss in the absence of additional mitigation. Therefore, for the best possible outcome, soil removed from these areas will be retained on Site, and following completion of works will be used to restore fungal diversity in the retained and enhanced grassland. 5.47 To encourage the retained fungi to colonise new areas of the grassland the application of fertiliser, herbicides and pesticides will be prohibited. In addition, grassland mowing will be prohibited during autumn to ensure mushroom production and spore release.

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

19 Objective 5 - Provide mitigation, compensation and enhancements for protected/ notable species through provision of bird and bat boxes Bats 5.48 New roosting opportunities will be provided by installing eight bat boxes at the southern woodland, refer to Map 2. This will enhance the Site for bats. Bat boxes will be of different types to include the below: • 3 X 2F Schwegler Bat box https://www.nhbs.com/2f-schwegler-bat-box-general- purpose • 1 X Large multi chamber woodstone bat box https://www.nhbs.com/large-multi- chamber-woodstone-bat-box • 2 X low profile Woodstone bat box https://www.nhbs.com/low-profile-woodstone-bat- box • 2 X vivara pro woodstone bat box https://www.nhbs.com/vivara-pro-woodstone-bat-box

5.49 Bat boxes will be located and installed as follows: • Where bats are known to feed/ navigate. • At least 4m above ground. • Away from artificial light sources. • Sheltered from strong winds. • Expose to the sun for par of the day. Birds 5.50 Mitigation and compensation for bird species in the form of nest boxes will be incorporated on the Site. A total of eight bird boxes will be installed at the woodland to the south of the Site. Boxes will comprise a variety of styles to provide habitat for a range of birds with differing nesting requirements, these are as follows: • 5 X NHBS wooden bird next box https://www.nhbs.com/nhbs-wooden-bird-nest-box • 1 X Eco Tawny owl nest box https://www.nhbs.com/eco-tawny-owl-nest-box • 1 X Barn Owl Nest box https://www.nhbs.com/barn-owl-nest-box • 1 X woodpecker bird house https://www.nhbs.com/woodpecker-bird-house

5.51 Bird boxes will be installed and located as follows: • Where birds are known to feed/ navigate • At least 3m above ground • Space boxes away from neighbours to prevent territorial behaviour • Shelter from the weather - the front of the nest box should be angled vertically or slightly downwards to prevent rain from entering the nest box • Boxes should be attached to the tree using an aluminium nail or tied in position using wire/leather

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

20 6. REFERENCES Bat Conservation Trust (2016). Core Sustenance Zones: Determining zone size. The Bat Conservation Trust, London.

Bat Conservation Trust and Institution of Lighting Professionals (2023) Guidance Note 08/23: Bats and artificial lighting in the UK. ILP, Rugby

Balmer, DE., Gillings, S., Caffrey, BJ., Swann, RL., Downie, IS & Fuller, RJ. (2013) Bird Atlas 2007-11: The Breeding and Breeding Birds of Britain and Ireland. Thetford, BTO Books. Bibby, C.J. Burgess, N.D. Hill, D.A. & Mustoe, S.H. (2000) Bird Census Techniques. 2nd edition. Academic Press, London. Bird Survey & Assessment Steering Group. (2022). Bird Survey Guidelines for assessing ecological impacts, v.1.0.0. https://birdsurveyguidelines.org [01/06/2022] Chartered Institute of Ecology and Environmental Management (CIEEM) (2018). Guidelines for Ecological Impact Assessment in the UK and Ireland. CIEEM, Winchester.

Collins, J. (ed.) (2023). Bat Surveys for Professional Ecologists: Good Practice Guidelines (4th edn). The Bat Conservation Trust, London.

DEFA (2010). Manx Hedgerow Management Code of best practice. [online]

DEFRA (undated). Multi-agency Geographic Information for the Countryside (MAGIC) Map (http://magic.defra.gov.uk/MagicMap).

Eaton, MA., Aebischer NJ., Brown, AF., Hearn, RD., Lock, L., Musgrove, AJ., Noble, DG., Stroud, D., & Gregory, RD. (2015). Birds of Conservation Concern 4: the population status of birds in the United Kingdom, Channel Islands, and Isle of Man. British Birds. 108, 708-746.

Environmental Management, Romsey. Fuller, RJ. (1980) A method of assessing the ornithological interest of sites for nature conservation. Biological Conservation. 17, 229-239. Fuller, RJ. (1982) Bird Habitats in Britain, London, T & AD Poyser. Froglife (1999) Froglife Advice Sheet 10. Reptile Survey. An introduction to planning, conducting and interpreting surveys for snake and lizard conservation. Froglife, Halesworth, Suffolk.

Gent, A.H. and Gibson, S.D., eds. (2003) Herpetofauna Workers’ Manual. Joint Nature Conservation Committee. Peterborough.

Geology - British Geological Society: www.bgs.ac.uk

Gilbert, G., Gibbons, DW. & Evans, J. (1998). Bird Monitoring Methods: A manual of techniques for key species. Sandy, RSPB/BTO/JNCC/WWT/ITE/The Seabird Group RSPB/BTO.

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

21 Herpetofauna Groups of Britain and Ireland (1998). Evaluating Local Mitigation/Translocation Programmes: Maintaining Best Practice and Lawful Standards. HGBI advisory notes for Amphibian and Reptile Groups (ARGs). HGBI, c/o Froglife, Halesworth. Unpublished. Morris M.G. (2000). The effects of structure and its dynamics on the ecology and conservation of arthropods in British grasslands. Biological Conservation, 95, 129–142.

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MAP 1 P30/96 CLIENT: PROJECT: DATE: 27 November 2024 Main Map Frame: SCALE: 1:1,500 at A3 Y:\Isle of Man, Peel Sewage Works 3096\GIS\Technical Note\Map1_FungiSurveyResults2024_P3096_271124.mxd Manx Utilities Isle of Man, Peel Sewage Works 2 1 3 0 20 40 60 80 100 Metres KEY Site boundary Fungi survey results 2024 ± Fungi Survey Results 2024 Aerial Image: Esri, Maxar, Earthstar Geographics, and the GIS User Community Basemap: © OpenStreetMap (and) contributors, CC-BY-SA

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MAP 2 P30/96 CLIENT: PROJECT: DATE: 02 October 2024 Main Map Frame: SCALE: 1:1,000 at A3 Y:\Isle of Man, Peel Sewage Works 3096\GIS\Technical Note\MapX_PotentialBoxLocations_P3096_3240_021024.mxd Manx Utilities Isle of Man, Peel Sewage Works !( !( !

!( !( !( !( !( !( !( SC2420883180 SC2421183168 SC2420083158 SC2418383146 SC2418883138 SC2418083153 SC2420183169 SC2411883192 SC2410983208 SC2407583281 0 10 20 30 40 50 Metres KEY !( Bat boxes !( Bird boxes !

Bat & Bird boxes ± Locations of Trees with Bat & Bird Box Potential Aerial Image: Esri, Maxar, Earthstar Geographics, and the GIS User Community Basemap: © OpenStreetMap (and) contributors, CC-BY-SA

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Appendix 1 Legislation & Policy

The Isle of Man Wildlife Act 1990 (as amended) Wildlife Act 1990 6.1 The Isle of Man Wildlife Act 1990 (as amended) is the main piece of wildlife legislation that enables the designation of statutory protected sites (Marine Nature Reserves (MNRs), Areas of Special Scientific Interest (ASSIs), National Nature Reserves (NNRs) and Areas of Special Protection (ASPs)), the protection of listed fauna and flora and the control of invasive species. 6.2 Key Sections are provided below: Bats 6.3 Horseshoe bat (all species) Rhinolophidae and typical bats (all species) Vespertilionidae are all protected under Schedule 5 of the Isle of Man Wildlife Act 1990 (as amended). 6.4 As such, a person is deemed to have committed an offence if they: “damages or destroys, or obstructs access to, any structure or place which any wild animal included in Schedule 5 uses for shelter or protection; or disturbs any such animal while it is occupying a structure or place which it uses for that purpose”. Birds 6.5 All wild birds are afforded protection under the Isle of Man Wildlife Act 1990 (as amended). An offence is deemed to have been committed if: “any person intentionally or recklessly — (a) kills, injures or takes any wild bird; (b) takes, damages or destroys the nest of any wild bird while that nest is in use or being built; or (c) takes or destroys an egg of any wild bird”. 6.6 In addition, species listed on Schedule 1 of the act makes it an offence to: “Intentionally or recklessly — (a) disturbs any wild bird included in Schedule 1 while it is building a nest or is in, on or near a nest containing eggs or young; or (b) disturbs any nest or egg of such a bird; or (c) disturbs dependent young of such a bird”. Plants 6.7 Certain plant species are listed on Schedule 7 as protected species. It is an offence:

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RSTS Phase 2 – Peel Sewage Treatment Works Landscape and Ecological Mitigation and Management Plan 3096-1A Final Report – 10 December 2024

23 “If any person intentionally or recklessly picks, uproots or destroys and wild plant included in Schedule 7”. Invasive non-native species 6.8 Certain plant species are listed on Schedule 8 of the Wildlife Act due to the threat of invasive spread into native habitats. It is an offence: “if any person plants or otherwise causes to grow in the wild any plant which is included in Part II of Schedule 8.

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Tree Preservation Act 1993 Isle of Man Biodiversity Strategy and Delivery Plan