18 Summary of Mitigation and Residual Effects

Transcription

18 Summary of Mitigation and Residual Effects
18 Summary of Mitigation and Residual Effects
18.1 Summary of mitigation
18.1.1 The outset of the EIA process involved an iterative approach to inform the design of the Proposed
Development and where practicable, measures to mitigate likely significant negative environmental
effects were incorporated into the Proposed Development to avoid, reduce or offset such effects. The
result is such that the Proposed Development includes inherent mitigation.
18.1.2 Where the assessment has resulted in potential significant negative effects mitigation has been
identified to:
Control and manage the demolition and construction activities; and
Control the operation of the Proposed Development.
18.1.3 Outlined below in Table 18.1 is a summary of the mitigation measures identified in each of the technical
chapters of this ES (Chapters 6 – 16) for the construction and operation stages.
18.1.4 Appropriate and relevant planning conditions are invited to secure the required mitigation.
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Table 18.1: Summary of Mitigation
Chapter
Stage of
Development
Likely Significant Effect
Ground Conditions
and Contamination
Construction
Effect of Exposure to
Contamination associated
with historic land use on
human health
Mitigation Measures
Preparation of a Construction Environmental Management Plan (CEMP) taking into
account relevant good site practice with respect to the handling of potentially
contaminated material and submitted for approval to LBH pre-commencement of
development. The CEMP will be enforced and monitored throughout the construction
phase.
The health of construction workers and the general public from potentially
contaminated soils and materials will be controlled under the Construction (Design &
Management) Regulations 2007.
Where necessary, construction workers will be required to wear personal protective
equipment (PPE) and Respiratory Protective Equipment (RPE), such as gloves and
dust ventilation masks to prevent dermal contact and inhalation or ingestion of
contaminants. Appropriate site hygiene and welfare facilities will be provided as per
relevant regulations.
The associated hazards of handling potentially contaminated materials will be
conveyed to all site workers and all works will be conducted in accordance with the
Health and Safety Executive publication entitled “Protection of Workers and the
General Public during the Development of Contaminated Land” (1991).
A more detailed site investigation will be undertaken to ensure that all potential
contamination risks are adequately identified, characterised and mitigated within all
health and safety risk assessments, construction activities for the protection of site
workers and provide further ground information for detail design.
Soil waste classification will be required for appropriate disposal off-site or for re-use
on-site. As part of any re-use of materials on site a further risk assessment of material
will be required and a Material Management Plan (MMP) could be completed.
Any additional contamination that is encountered during the mitigation works will be
addressed in accordance with a Remediation Method Statement. The works will be
inspected and validated and documented in a Verification Report.
The underground storage tanks will also be decommissioned, and removed including
interceptor chambers and associated pipework according to a Remediation Method
Statement. The works will be inspected, validated and documented in a Verification
Report.
Water/dust suppressant will be sprayed onto material being worked during the
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cut/excavation exercise for the basement or culvert diversion works to damp down any
dust and prevent it from becoming airborne, where necessary.
If asbestos containing materials are identified then they will either be removed as part
of the site preparation in accordance with the Control of Asbestos Regulations 2012 of
mitigated under a Material Management Plan to ensure the potential risks are
appropriately managed.
A watching brief will be implemented during the excavation to ensure that any
unexpected contamination across the Site is identified, risk assessed and treated
appropriately.
Should additional contamination hotspots be identified during the site investigation prior
to construction, these will be remediated in line with the agreed Remediation Strategy.
Effect of Exposure to
Contamination on Third
Party Occupants and
Properties
As detailed above, further site investigation will be undertaken prior to construction to
ensure that all potential contamination risks are adequately identified, characterised
and mitigated within all health and safety risk assessments, construction activities for
the protection of third parties. This could be undertaken post planning consent, precommencement of development.
Water/surfactant will be sprayed onto material being worked to damp down any
potentially generated dust and prevent it from becoming airborne, where necessary.
Any asbestos containing materials that are identified on Site should be removed prior to
any necessary demolition in accordance with the Control of Asbestos Regulations 2012
to ensure the potential risks are appropriately managed.
Precautions will also be taken while transporting excavated materials off-Site to ensure
that any risk of fugitive dust emissions are prevented, such as the sheeting of wagons.
Vehicle movements will be restricted to an agreed travel plan and construction activities
will be undertaken during standard construction industry working hours or as agreed in
advance with Haringey Council in the event of the need for work outside of these times
in exceptional circumstances.
Effect on Groundwater
from existing sources of
contamination
The removal of protective layers of superficial deposits will be avoided where possible
to prevent the potential migration pathways. It will also need to be confirmed that that
there is a significant thickness of low permeability material at the base of excavations
which do not penetrate and create pathways into the underlying Lambeth Beds, Thanet
Sands and White Chalk.
Further assessment of groundwater will need to be undertaken during the construction
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phase works, however it is possible that a system may need to be put in place to
ensure the appropriate management of groundwater as a result of the dewatering of
excavations including suitable disposal of the groundwater.
A Remediation Strategy will be employed to identify the presence of any contamination
when undertaking work adjacent to the underground tanks in the north of the site during
the construction works and a system put in place to control and manage any
contamination encountered.
Suitable protection or the consideration of decommissioning the groundwater
abstraction well on-site if no longer in use should be undertaken prior to any
construction works. If decommissioned it will be undertaken in accordance with the
Environment Agency publication “Good Practice for Decommissioning Redundant
Boreholes and Wells”.
During any piling consideration will be given to the use of clean drilling techniques and
the avoidance of techniques which could result in the creation of vertical contamination
pathways into natural strata beneath the London Clay.
During the re-directing of the Moselle Brook, it should be ensured that no spillages and
leakages from site plant, equipment or other activities enter the surface water. This
should also include surface run-off from the development platform and the release of
any silt/sediment into the Brook. This will be undertaken in accordance with the
Environment Agency Pollution Prevention Guidance Note 6 “Working at Construction
and Demolition Sites”.
The diversion of the Brook will need to be undertaken in consultation and knowledge of
the Environment Agency. It may be required that a programme of monitoring is
implemented pre and post-development to confirm the status of water quality.
The recommendations outlined above would be documented within the CEMP and
followed to ensure good working procedures and good housekeeping.
Effect of Contamination on
Potable Water Supply
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Guidance detailed in the UK Water Industry Research (UKWIR): Guidance for the
Selection of Water Supply Pipes to be used in Brownfield Sites (UKWIR 2010) will be
adhered to during the redevelopment of the Site and it may be necessary to adopt
barrier type pipe materials which prevent contaminant ingress and to backfill service
corridors with clean imported material in those areas where Made Ground is present.
However this will not apply to potable water supply pipes currently on Site that may be
utilised by construction workers which may or may not be constructed with permeable
pipe materials.
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Further site investigation works as required would be undertaken prior to installation of
water supply pipes to ensure that all potential contamination risks associated with water
supply are adequately mitigated in accordance with the UKWIR guidance.
Operation
Effect of Contamination on
Future Site Occupants and
Properties
A robust and long term durable solution will be implemented for the Proposed
Development particularly in the areas where residential properties will be present. This
will comprise engineered mitigation measures through the placement of materials
suitable for use in accordance with CLEA soil screening values for a residential use
and a clean soil cover thickness in line with technical guidance provided in BRE 465
“Cover Systems for Land Regeneration”.
The structural risk from chemical attack will already have been mitigated at the design
and construction phases by the use of the appropriate concrete specification as
detailed within the BRE Special Digest 1: 2005 Concrete in Aggressive Ground
Services and utilities will be laid in clean and dedicated service trenches.
The risk to future site maintenance/utility workers in excavations will be mitigated by the
installation of services within dedicated clean corridors. Such workers will be required
to wear personal protective equipment (PPE) and respiratory protective equipment
(RPE). Appropriate site hygiene and welfare facilities will be provided as per relevant
regulations. All works will be undertaken in accordance with health and safety risk
assessments for the protection of site workers.
Potable water supplies will have been protected during the construction phase and all
services and utilities will have been placed within clean dedicated trenches and
backfilled with clean material.
Archaeology and
Cultural Heritage
Construction
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Effect of Contamination on
Third Party Properties and
Occupants
Due to the negligible significance of effects on third party occupants or properties, no
mitigation is required.
Effects on Surface and
Groundwater
Potential risks will have been mitigated as part of development design during the
construction phase therefore no mitigation is required.
Truncation or loss of
buried/surface
archaeological remains
Archaeological mitigation can be agreed in several forms, namely:
Preservation 'in situ' (i.e. the avoidance of any effect upon buried archaeological
assets); or
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Preservation by record (i.e. the controlled archaeological investigation and
recording of assets); or
A combination of the above.
Consideration will be given to alternatives to preservation by record if possible and
practicable. However, it is recommended that preservation by record can be achieved
prior to the commencement of the limited demolition, extensive earthworks and
construction activity. This may include observation of test pits/trenches for other
purposes (i.e. further geotechnical investigations) or specific archaeological
investigations (such as trial trench evaluation, open area strip where practicable etc.).
The scope of archaeological mitigation works will be agreed with the archaeological
adviser at GLAAS (Adam Single). Irrespective of the timing of archaeological
investigation, it will be subject to the agreement in the form of a Written Scheme of
Investigation (WSI) under the terms of a standard planning condition.
Effect on Built Heritage
Assets
The Proposed Development is considered, through design, to ensure the effects of the
Site on other heritage assets is reduced as far as possible by design, for example,
through the use of high quality materials. However since any direct lines of sight from
any heritage assets into the Site are significantly obscured by the existing development
and infrastructure, no further mitigation measures are considered appropriate or
proportionate to meaningfully reduce the effect of change.
Due to the location of the Site in such a densely built up area of London it is advised
that there is compliance with CDM regulations in relation to good housekeeping
practice on site and within the immediate environs to reduce the effects such as dust,
noise and the management of site traffic.
In addition, consideration could be given to artwork on any hoardings or scaffolding
covers, such as the use of building wraps, particularly along the Hornsey High Street
frontage, to minimise adverse effects of the construction works on the local heritage
assets. However, the inclusion of these measures has not been taken into account
within the assessment of residual effects.
Effect on Hornsey High
Street Public Baths and
Wash House
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Based on the current condition of the baths, its lack of designation and inclusion in the
HER it is concluded that a Level 1 Historic Building Survey of the Public Baths will be
an adequate level of preservation through record. It is also planned to retain the central
portion of the façade of the Public Baths, including the central doorway and plaque with
the former borough’s arms, and relocate adjacent to the façade of the newly
constructed sub-station.
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Chapter
Noise and Vibration
Stage of
Development
Likely Significant Effect
Mitigation Measures
Operation
Effect on Built Heritage
Assets
The Proposed Development is considered, through design, to ensure the effect of the
Site on other heritage assets is reduced as far as possible through design features.
Assuming all works are undertaken in accordance with the principles set out in Chapter
4 – The Proposed Development and Alternatives and appropriately monitored, no
further mitigation measures are proposed.
Construction
Construction Noise &
Vibration
The appointed principal contractor will be charged with developing and implementing a
CEMP and submitting a Section 61 application to LBH.
The principal contractor will also be encouraged to register the Site under the
Considerate Constructors Scheme.
The CEMP will be developed in liaison with the Environmental Health Department of
LBH. The CEMP will outline the following measures:
Environmental management responsibilities and activities;
Monitoring and auditing protocols;
Complaints response procedures; and
Community and stakeholder liaison processes.
The CEMP will outline the different procedures to be undertaken in order to complete
the various works. Individual trade contracts will incorporate requirements for
environmental control, based on good working practice, such as careful programming,
resource conservation, adhering to health and safety legislation and quality
management procedures.
The Section 61 application will be more specific with respect to noise and vibration
during the demolition and construction phases. It will include predicted noise levels,
best practice measures, site specific mitigation measures, a complaints procedure and
dispensation requirements.
The principal contractor and trade contractors will at all times apply the principle of Best
Practicable Means as defined in Section 72 of the Control of Pollution Act, 1974. Best
practice measures to mitigate the adverse effects of noise are likely to include the
following:
Unless otherwise agreed with LBH, site hours will be 08:00 to 18:00 hours
Monday to Friday and 08:00 to 13:30 hours on Saturday.
No work which is audible at the Site boundary will be undertaken outside the
specified hours, except in cases of emergency where safety is an issue, or where
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a prior agreement has been reached with LBH.
The contractor will comply with the requirements of the Control of Pollution Act
1974 (with particular reference to Part III), the Environmental Protect Act 1990, the
Health and Safety at Work Act 1974 and the Control of Noise at Work Regulations
2005.
All plant and equipment to be used for the works will be properly maintained,
silenced where appropriate, operated to prevent excessive noise and switched off
when not in use, where practicable.
Plant will be certified to meet relevant current EU legislation and should be no
noisier than would be expected based on the noise levels contained in Annex C
and Annex D of BS 5288-1: 2009 Noise and Vibration Control on Construction and
Open Sites.
All trade contractors will be made familiar with current noise legislation and the
guidance contained in BS 5228 (Parts 1 and 2) which will form a prerequisite of
their appointment.
Unless agreed in advance all deliveries will be during the construction site hours
and on a “just-in-time” basis to avoid/minimise vehicles waiting outside or on the
Site with engines running.
Loading and unloading of vehicles, dismantling of equipment such as scaffolding
or moving equipment or materials around the Site will be conducted in such a
manner as to minimise noise generation.
Deviation from approved method statements will be permitted only with prior
approval from the principal contractor and other relevant parties. This will be
facilitated by formal review before any deviation is undertaken.
A contact number which the public may use shall be displayed prominently on the
Site board and any noise complaints will be reported to the principal contractor
and immediately investigated.
It is likely that the measures above, including methods of work and restrictions on
working hours, will be agreed with LBH as part of the Section 61. These measures
have been taken into account within the assessment of residual effects.
Operation
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Operational road traffic
The road traffic assessment determined that effects will be negligible along all road
links. Therefore, no particular mitigation measures are considered necessary.
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Fixed building services
plant
Mitigation Measures
An external free-field noise level of 40 dB LAeq,16h for the day and 35 dB LAeq,8h for
the night is proposed which allows for character, in the form of a 5 dB penalty, of
proposed fixed plant in order to meet the target internal noise levels.
Ultimately, it will be necessary to design, select, locate and / or attenuate all building
services plant on the Site so that the relevant performance standards, as agreed with
LBH, are achieved at the closest existing and proposed residential properties.
Effect of noise associated
with Sainsbury’s foodstore
The following best practice measures, as required by LBH should be implemented and
included in the store’s management plan:
All manoeuvring and unloading of HGVs inside the service yard should be done
with the service yard gates closed.
Lorries should not wait outside with engines and refrigeration units operating.
If possible, the gates to the service yard should be solid and designed to minimise
noise break-out. In addition, noise from opening and closing of the gates should
be minimised.
Make sure the delivery point is ready for the vehicle before it arrives – gates and
doors should be open to avoid vehicles idling.
Avoid using external bells or tannoy systems.
Minimise excessive air brake noise.
Use newer and quieter delivery vehicles and equipment, where possible.
HGV doors should not be slammed and radios to be switched off.
Rubber matting or an alternative solution to be agreed with LBH to be installed at
appropriate locations to reduce the noise of roll cages (if cages will be wheeled
across the service yard).
To avoid multiple HGVs waiting to be unloaded, communication between the
driver or depot with the Sainsbury’s store should be encouraged to provide an
estimated time of arrival at the store itself.
Drivers should not sound their horn (particularly during the night) and ensure that
directional white noise reversing alarms are fitted wherever possible.
The above measures have been taken into account within the assessment of residual
effects.
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Effect of noise of proposed
residential dwellings - Site
Suitability
Mitigation Measures
For the proposed units at 45 High Street the following indicative sound insulation
performance specifications are recommended for the glazing to the living areas and
bedrooms:
Living rooms and bedrooms – 40dB Rw + Ctr Glazing
In order that the above acoustic performance requirements may be achieved by the
glazing systems, the following typical constructions are considered appropriate:
Living rooms and bedrooms – 10mm glass /16mm airspace / 10.8mm acoustic
laminate glass
For proposed units on the rest of the site the following indicative sound insulation
performance specifications are recommended for the glazing to the living and
bedrooms:
Living rooms and bedrooms – 26dB Rw +Ctr Glazing
In order that the above acoustic performance requirements may be achieved by the
glazing systems, the following typical constructions are considered appropriate:
Living rooms and bedrooms – 6mm glass /12mm airspace / 6mm glass
The ventilation strategy should include acoustic attenuation to ensure that the internal
noise criteria are not exceeded due to the mechanical ventilation system. The acoustic
design of the ventilation system would be addressed at the detailed design stage.
Implementation of the above measures has been taken into account within the
assessment of residual effects.
Local Air Quality
Construction
Generation of Dust and
PM10 during Site
clearance and construction
A number of mitigation methods, as detailed in the London Councils Best Practice
Guidance, should be implemented as appropriate including:
Vehicles carrying loose aggregate and workings should be sheeted at all times;
Implementation of design controls for construction equipment and vehicles and
use of appropriately designed vehicles for materials handling;
Completed earthworks should be covered or vegetated as soon as is practicable;
Regular inspection and, if necessary, cleaning of local highways and Site
boundaries to check for dust deposits (and removal if necessary);
Minimise surface areas of stockpiles (subject to health and safety and visual
constraints regarding slope gradients and visual intrusion) to reduce area of
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surfaces exposed to wind pick-up;
Use of dust-suppressed tools for all operations;
Ensuring that all construction plant and equipment is maintained in good working
order and not left running when not in use;
Restrict on-site movements to well within Site and not near the perimeter, if
possible; and
No unauthorised burning of any material anywhere on-site.
The construction is proposed to take place in a phased approach, this approach will
limit the size and area of any dust generating activities and increase the separation
distances to the nearest sensitive receptors.
Implementation of the above measures has been taken into account within the
assessment of residual effects.
Emissions to air of PM10
and NO2 from construction
vehicles leaving or
accessing the Site and site
plant
Mitigation measures to control construction traffic will be discussed with LBH to
establish the most suitable access and haul routes for the site traffic to avoid sensitive
roads (residential roads, congested roads, via unsuitable junctions, etc.) where
possible and keeping vehicles clean (through the use of wheel washers, etc.) and
sheeted when on public highways. Timing of large-scale vehicle movements to avoid
peak hours on the local road network will also be beneficial.
Liaison with Officers at LBH and local residents will be maintained throughout the
construction process.
Operation
Water Resources
and Flood Risk
Construction
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Emissions from traffic &
on-site energy centre
generated by the Proposed
Development
The energy facilities for onsite energy generation will incorporate the use of low NOx
emission for the combined heat and power unit and supplementary boilers.
Contamination of surface
water
A Construction Environmental Management Plan (CEMP) will be implemented to
manage and control site works, including management of wastewater and the storage
of fuel and oils. The CEMP will detail the procedures and methods that are to be
followed by the construction workforce in order to minimise the potential effects of
construction on surface water features. The CEMP will be developed and agreed with
LBH, the Environment Agency and other regulators/consultees, as required, prior to the
A Travel Plan is submitted with the Detailed Planning Application. The Travel Plan
focuses on sustainable modes of transport promoting public transport, walking and
cycling, which all form key components of the Travel Plan. Additional measures include
the provision of electric vehicle charging points and car clubs.
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commencement of the construction activities. Contractors working on the Site will be
required to comply with the CEMP.
All construction activities should be undertaken in accordance with the Environment
Agency’s Pollution Prevention Guidelines (PPG) including:
PPG 1: General Guide to the Prevention of Pollution;
PPG 5: Works and maintenance in or near Water;
PPG 6: Working at Construction and Demolition Sites; and
PPG 8: Safe Storage and Disposal of Oils.
will
only be active when required. Other activities associated with the use of construction
vehicles (such as wash-down facilities) will be appropriately managed to contain
contaminants and regulate the release of clean water into the natural environment. In
addition, designated haulage routes around the Site will be identified to minimise the
impacts on soil stability and the subsequent effects of sedimentation on surface water
within the vicinity of the Site.
Construction vehicles will be regularly maintained to reduce the risk of hydrocarbon contamination and
It is recommended that surface runoff from the various construction areas within the
Site is managed by the appropriate use of temporary bunding and sediment traps to
ensure the protection of water quality in the receiving water environment from sediment
load and contaminants. Settlement ponds are beneficial in that they allow for isolation
and on-site treatment of sediment laden or chemically contaminated surface runoff prior
to discharge of following agreement with the appropriate authority or use of other
appropriate means of disposal.
To mitigate potential impacts associated with the dewatering of excavations
consideration should be given CIRIA 515: Groundwater Control – Design and Practice.
The water pumped or abstracted during a groundwater control operation (i.e.
dewatering of excavations) is legally classified as ‘trade effluent’ and as such a
discharge consent will be required from either the Environment Agency or Thames
Water depending on whether the water is to be discharged to Moselle Brook or the
Public Foul Sewer respectively.
Prior to commencement of any culvert diversion works a detailed methodology will be
developed by the construction contractor for diversion of the existing Moselle brook
culvert. The methodology will be developed using current best practice and will adhere
to the guidance outlined within EA Pollution Prevention Guidance note 5: ‘Works and
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maintenance in, near water’. Approval from the Environment Agency will be obtained
prior to commencement of any diversion works.
The assessment of residual effects has taken into consideration the use of the above
mitigation measures.
Operation
Effects on Moselle Brook
No mitigation measures are considered necessary given that the existing culvert will be
diverted to ensure that no building structures are constructed over the culvert.
However, as detailed above prior to commencement of any culvert diversion works a
detailed methodology will be developed using current best practice Environment
Agency guidance.
Potential Contamination of
Surface Waters
Any surface water discharges from public car parking areas will incorporate appropriate
pollution control measures such as petrol/water interceptors or appropriate SUDS to
minimise the risk of polluted surface water runoff entering the culverted Moselle Brook.
Consideration for the appropriate storage of potentially hazardous substances /
materials within the proposed development will be given during the operational phases.
Depending on the nature of materials / substances to be stored on site, appropriate
mitigation measures may include but not be limited to the following:
Storage of hazardous materials on impermeable hardstanding within bunded and
secure containers; and
Use of oil interceptors.
The assessment of residual effects has taken into consideration the use of the above
mitigation measures.
Alteration of the Drainage
Regime and Flood Risk
On the basis that the drainage strategy for the site includes below ground attenuation
tanks and SuDS features in the form of brown roofs that will result in a reduction in the
peak discharge rate of 50% no mitigation measures are required.
Increased Water Usage
and Demand
Measures to promote the re-use and / or recycling of water to reduce overall water
demand will be considered for integration into the Proposed Development.
Residential units within the Proposed Development will meet Code for Sustainable
Homes Level 4 which equates to water consumption rates of 105 litres per person per
day.
Non-residential elements of the Proposed Development will meet BREEAM ‘Very
Good’.
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Water efficiency measures will be installed, consistent with the associated Code for
Sustainable Homes Level and BREEAM rating, best practice and applicable Building
Regulations, and could include measures such as water efficient sanitary fixings and
appliances and grey water recycling systems.
Daylight, Sunlight
and Overshadowing
Construction
Operation
Ecology
Construction
Increased Pressure on
Foul Sewerage
Infrastructure
Wastewater production is closely linked to water consumption and is likely to be very
similar in terms of volume. Therefore the mitigation measures proposed to reduce
water demand will also be effective in reducing the pressure on foul sewerage
infrastructure as a result of the Proposed Development. For residential dwellings Code
for Sustainable Homes Level 4 will be met (achieving potable water consumption to
105 litres per day) and for Commercial buildings BREEAM ‘Very Good’ will be met.
Neighbouring Daylight &
Sunlight
N/A
Internal Daylight Adequacy
N/A
Overshadowing
N/A
Neighbouring Daylight &
Sunlight
None proposed
Internal Daylight Adequacy
None proposed
Overshadowing
None proposed
Effect on non-statutory
designated sites within
400m as a result of dust
generation
Dust will be minimised through standard damping down processes throughout the
construction period, as set out within Chapter 8 Local Air Quality. This will include a
variety of techniques as appropriate, for example:
use of dust supressed tools for all operations;
during dry or windy weather, material stockpiles and exposed surfaces will be
dampened down using a water spray to minimise the potential for wind pick-up;
vehicles carrying loose aggregate and workings will be sheeted at all times;
implementation of design controls for construction equipment and vehicles and the
use of appropriately designed vehicles for materials handling;
completed earthworks will be covered or vegetated as soon as is practicable;
Monitoring of dust deposition will also occur throughout the construction period, with
works halted and methods revisited should concerns arise.
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Effect of noise upon nonstatutory designated sites
within 400m
No specific noise control mitigation required in relation to non-statutory sites, however
noise control measures will be implemented during construction; as detailed within
Chapter 9 Noise and Vibration.
Effect upon Black Redstart
Building demolition is anticipated to be completed in winter 2013-14, thereby avoiding
the main bird nesting season and minimising the risk of contravention of the Wildlife
and Countryside Act 1981 (as amended) through damage or destruction of an active
bird’s nest.
In the event that demolition of small areas of the Site extends into March 2014, any
remaining buildings on Site will be surveyed by a suitably qualified ecologist within
24hrs prior to demolition to confirm presence or absence of active bird nests. This will
include survey of bird behaviour on the Site and internal inspection of buildings (where
safe access is possible). In the unlikely event that an active bird nest is identified at this
stage this will be left in situ with a suitable buffer until the chicks have fledged. If
breeding behaviour by black redstart is recorded during these surveys it will be ensured
the exclusion buffer implemented (in which no demolition or construction works occur)
is sufficient to prevent disturbance of birds whilst they are at the nest or have
dependent young.
Extensive (those requiring limited inputs and management and designed to replicate
natural brownfield habitat) brown roofs covering 0.09 ha will be created on roofs
between five to seven storeys in height on blocks within ‘The Quadrangle’ in the north
west corner of the Proposed Development. Brown roof will be created on three five
storey roofs, and one seven storey roof; providing a variety of habitat parcels with
different aspects and exposure in relation to the building structure. These roofs will
replace the approximately 0.07 ha of existing ephemeral vegetation on the Site, and
other small areas of foraging habitat too small to map. The brown roofs will comprise a
suitable low nutrient substrate to support a variety of ruderal plants at a low-density
coverage, which is designed to re-create brownfield habitats favoured by black redstart.
This 0.09 ha of brown roof will be solely designed for biodiversity during the operational
phase, with no public access permitted. The design of the brown roof will:
Be based on the aggregate mix present at the original site (this would be a mixture
of crushed brick and concrete graded from 25mm to dust);
Be contoured from heights of 5cm to 15cm; and
Be allowed to become colonised by vegetation and invertebrate species naturally
(i.e. not be seeded or covered with sedum matting).
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Stage of
Development
Likely Significant Effect
Mitigation Measures
In addition to provision of brown roofs four nest boxes will also be installed to increase
the availability of nesting sites. These will be boxes designed specifically for black
redstart, such as the open fronted woodcrete box (2HW) or nesting brick type (No24)
produced by Schwegler. Nest boxes will be located in proximity to the brown roofs
installed on ‘The Quadrangle’. In addition to this nest site provision, the building’s
stepped design will also naturally provide a variety of ledges and open song posts 20m
or greater above the ground level and with no public access.
Effect upon other breeding
birds
Building demolition is anticipated to be completed in winter 2013-14, thereby avoiding
the main bird nesting season and minimising the risk of contravention of the Wildlife
and Countryside Act 1981 (as amended) through damage or destruction of an active
bird’s nest. In the event demolition of small areas of the Site extends into March 2014,
within the nesting season, remaining buildings on Site will be surveyed by a suitably
qualified ecologist within 24hrs prior to demolition to confirm presence or absence of
active bird nests. This will include survey of bird behaviour on the Site and internal
inspection of buildings (where safe access is possible). Should a bird nest be identified
this will be left in situ with a suitable buffer until the chicks have fledged or the nest is
considered no longer active.
In addition, ground level landscaping will include areas of lawn, trees and hedgerows;
replacing foraging resource currently available on the Site perimeter and ten bird boxes
(in addition to nest site provision specifically for black redstart) will be incorporated
within the Proposed Development; these will include models suitable for swift Apus
apus, house sparrow Passer domesticus and starling Sturnus vulgaris. These will be
situated in appropriate locations within the built development to maximise probability of
use, for example:
Avoiding positioning of bird boxes on south facing walls exposed to strong
sunlight;
Ensuring swift boxes are at least two storeys or greater above the ground; and
Positioning house sparrow boxes in proximity to ground level landscaped areas.
Operation
Hornsey High Street Environmental Statement
00037791
Effect of disturbance of
Japanese knotweed
A Japanese knotweed control and removal programme will be instigated by an
appropriately qualified contractor, prior to commencement of ground works.
Effect upon non-statutory
designated sites within
400m as a result of
increased recreation.
No mitigation is proposed.
18 | 16
Chapter
Stage of
Development
Likely Significant Effect
Socio Economics
Construction
Direct on-site employment
No mitigation is required. There may be scope for additional measures to optimise
local recruitment during the site preparation, earthworks and construction phase but
this is uncertain at the time of writing; possible measures include linkages to local
training initiatives and/or voluntary agreements relating to local recruitment.
Indirect and induced
employment
No mitigation is required. There may be scope for additional measures to optimise
benefits to the local economy during the construction phase but this is uncertain at the
time of writing, possible measures include linkages to local suppliers and/or voluntary
agreements relating to local purchasing.
Direct on site employment
As the effect is positive no mitigation is required. There may however be scope for
additional measures to optimise benefits to the local economy, such as measures to
encourage local recruitment and linkages to training programmes for other employment
elements in the Proposed Development, although it is recognised that these are
relatively small in scale.
Indirect and induced
employment
The effect is negligible and no mitigation is required. There may however be scope for
additional measures to optimise benefits to the local economy, such as measures to
encourage local recruitment and linkages to training programmes.
Increase in housing stock
The effect is positive and no mitigation is required.
Effect on primary and
secondary schools
The principle of developments contributing to the expansion of existing facilities has
already been identified and this is clearly LBH’s preferred option. At this stage it is
uncertain if the Proposed Development will be required to make a contribution towards
education facilities. No additional mitigation is appropriate as effects are likely to be
negligible and residual effects have been assessed assuming no mitigation is provided.
Effect on GPs and Dentists
The principle of expanding facilities within the Heartlands Intensification Area has
already been identified and this is clearly LBH’s preferred option. At this stage it is
uncertain if the Proposed Development will be required to make a contribution towards
education facilities. No additional mitigation is appropriate as effects are likely to be
negligible and residual effects have been assessed assuming no mitigation is provided.
Operation
Spending from the new
community in the local
economy
Transportation and
Access
Construction
Hornsey High Street Environmental Statement
00037791
Effect of Vehicle Trips on
the Local Road Network
Mitigation Measures
The effect is positive and no mitigation is required.
A series of mitigation measures, outlined below, are proposed to minimise any
disruption whilst the Proposed Development is under construction. The Applicant
would also sign up to the Considerate Constructor’s Scheme, which seeks to reduce
any negative effect of construction. The scheme’s code requires construction work to
18 | 17
Chapter
Stage of
Development
Likely Significant Effect
Mitigation Measures
consider the environment, the Site workforce and the general public.
Typical site management measures will be introduced as follows;
Access to the Site will be controlled within the Site boundary, with all vehicles
being checked by banksmen to avoid conflicts between construction vehicles and
other road users;
Hoarding will be provided around the site with signage providing advance warning
of the presence of heavy vehicles manoeuvring;
Measures will be considered to encourage car sharing and the use of public
transport by construction personnel;
Ensure that all site workers know that there is no on-street parking in the
surrounding area as it is all covered within a CPZ;
Effective wheel / body washing facilities will be provided and used as necessary
on construction vehicles before they leave the Site;
Management/ pre-booking of deliveries to the Site to ensure minimal impact on
public highway;
Brushing and water spraying of heavily-used site hard surfaces and access points
as required;
Vehicles transporting materials, capable of generating dust, to and from the Site
will be suitably sheeted on each journey to prevent the release of materials and
particulate matter;
Road sweepers to address any dirt being carried onto public roads; and
Local residents will be consulted and kept informed as to the construction and
traffic management proposal.
The contractor will also be required to produce and agree a CEMP to describe how the
construction works (and the associated traffic movements) will be managed to avoid,
minimise and mitigate any construction effects on the environment, existing
surrounding communities and residents.
The treatment and disposal of all waste or other materials removed from the Site will be
in accordance with the requirements of the Environment Agency under the
Environment Protection Act 1990 (Ref. 6.13), Hazardous Waste (England and Wales)
Regulations 2005 (as amended), Environmental Permitting (England and Wales)
Hornsey High Street Environmental Statement
00037791
18 | 18
Chapter
Stage of
Development
Likely Significant Effect
Mitigation Measures
Regulations 2010 (as amended) and Waste (England and Wales) Regulations 2011. In
general and in accordance with the principles of the UK Government’s ‘Waste Strategy
for England 2007’ a principal aim during demolition and construction will be to reduce
the amount of waste generated and exported from the Site. This approach complies
with the waste hierarchy whereby the intention is first to minimise, then to re-use,
recycle or recover waste and, finally, to dispose of waste off-site as a last resort.
Operation
Effect on Pedestrian
Access
Any footpath and road closures will be agreed with LBHF and TfL, and diversions will
be provided to allow continuation of pedestrian accessibility to the surrounding area.
Pedestrians / Cyclists
No mitigation is considered necessary, however, the Proposed Development allows for
pedestrian permeability throughout the Site and will improve the pedestrian and cycle
environment
No mitigation is considered necessary, however, in order to encourage cycling as a
mode of transport, the Proposed Development will provide secure cycle parking and
cycle facilities for all uses within the Site, in accordance with TfL cycle parking
standards.
Bus Journeys
No mitigation is considered necessary
Rail Journeys
No mitigation is considered necessary
Traffic Generation –
Operational Phase
It is proposed to implement a revised junction layout at the junction of the A504 High
Street with the site access which will fully accommodate forecast traffic levels expected
on the High Street and accessing the proposed food store.
More generally, the net additional vehicular traffic generated by the Proposed
Development will be mitigated through the implementation of Residential and
Commercial Travel Plans.
Townscape and
Visual Impact
Construction
Effect of Change on Local
Townscape Receptors
Effects will be temporary in nature but the following mitigation will help to slightly
reduce adverse effects of the construction phase on identified townscape receptors:
Tidy site management will reduce the uncharacteristic clutter associated with
building works;
Consideration of artwork on any hoardings or scaffolding covers should be given,
such as the use of building wraps, to minimise adverse impacts of the construction
works on the local townscape character. Where artwork is not used, hoardings
should be of a uniform colour and style throughout the works;
Use of building wraps should be considered for the High Street frontage; and
Hornsey High Street Environmental Statement
00037791
18 | 19
Chapter
Stage of
Development
Likely Significant Effect
Mitigation Measures
Construction works lighting to involve the use of well located, modern light fittings
as part of a CEMP and in accordance with current best practice standards to
minimise lighting intrusion to surrounding sensitive receptors. Lighting and
boundary treatments on the northern and north-western boundaries are
particularly sensitive due to the proximity of local residents.
The assessment of residual effects has taken into consideration the use of the above
mitigation measures.
Effect of Changes to Visual
Amenity
In short range views, a number of mitigation measures can be implemented to reduce
the visual effects of the construction compound, including the following:
Tidy Site management will reduce the visual clutter associated with building
works;
Consideration of artwork on any hoardings or scaffolding covers should be given,
such as the use of building wraps, to minimise visual intrusion of the construction
works on local views. A building wrap along the frontage with the High street
would be particularly useful to minimise the visual intrusion into and within the
Conservation Area
Where artwork is not used, hoardings should be of a uniform colour and style
throughout the works; and
Construction works lighting to involve the use of well located, modern light fittings
as part of a CEMP and in accordance with current best practice standards to
minimise lighting intrusion to surrounding sensitive receptors. Lighting and
boundary treatments on the northern and north-western boundaries are
particularly sensitive due to the proximity of local residents.
The assessment of residual effects has taken into consideration the use of the above
mitigation measures.
Operation
Hornsey High Street Environmental Statement
00037791
Effects on Local
Townscape Receptors
Mitigation Measures have been built into the design, including new areas of public
realm, use of street trees and small raised planters, use of red and buff brick and brick
façade detailing including light brick trim to 45 High Street, block orientation, scale and
massing (as outlined in the Design Development Section of the Design and Access
Statement accompanying this planning application). However, the following mitigation
measures have been identified as being of potential benefit in reducing adverse effects
18 | 20
Chapter
Stage of
Development
Likely Significant Effect
Mitigation Measures
on the local townscape character and visual amenity in a few instances:
use of non-reflective materials on upper storeys;
use of high quality materials in the public realm;
use of appropriate lighting, signage, street furniture and planters;
Ensure street trees are planted in pits with appropriate soil and root protection
systems and suitable topsoil and volume, such as use of Greenleaf StrataCells
and RootRain aeration / irrigation systems (or similar approved);
Ensure continued growth and health of existing and newly planted trees through
appropriate monitoring and management; and
Replacement of any trees that die within 5 years with trees of suitable species and
size.
The assessment of residual effects has taken into consideration the use of the above
mitigation measures, where necessary as detailed in Chapter 15 Townscape & Visual
Effects.
Telecommunications
Construction
TV and Radio reception
It is not generally possible to mitigate the effects of cranes on, analogue radio and
satellite reception during working hours. However, effects are fairly minimal and would
not cause any lasting detrimental effects.
Operation
Broadcast TV
It is not possible to ‘design out’ the effects to broadcast (digital) TV. Most of the
mitigation measures can be adopted by the end users, and could include one of, or a
combination of, the following:
Realigning end-user reception aerials to an alternative transmitter;
Realigning end-user aerials to ensure maximum reception strength;
Upgrading equipment (TV reception aerials, cables and / or signal boosters /
amplifiers);
Relocating end-user aerials on building façades or rooftops to maintain a direct
line of sight; and
Switching to free to view satellite or subscription cable or ADSL services.
Broadcast Radio
Hornsey High Street Environmental Statement
00037791
Signal reflections from radio broadcasts can cause distortion of ‘s’ and ‘z’ sounds.
However, radio reception quality is usually improved by re-orientating the radio aerial.
18 | 21
Chapter
Stage of
Development
Likely Significant Effect
Satellite TV and radio
Hornsey High Street Environmental Statement
00037791
Mitigation Measures
It is not possible to ‘design out’ the effects to broadcast Satellite TV or Radio. Most of
the mitigation measures can be adopted by the end users, and could include one of, or
a combination of realigning and / or relocating end-user satellite dishes on building
façades or rooftops to maintain a direct line of sight.
18 | 22
18.2
Summary of residual effects
18.2.1 The likely significant residual environmental effects of the Proposed Development have been assessed.
These are the potential effects following the implementation of the proposed mitigation measures which
are outlined above and in the preceding technical Chapters of this Environmental Statement (ES)
(Chapters 6 - 16).
18.2.2 Each technical ES Chapter presents a detailed consideration of likely residual effects. Table 18.1
provides a summary of the residual effects of the construction and operational effects of the Proposed
Development which are identified in each of the technical ES Chapters. As outlined in Chapter 8 ‘Local
Air Quality’ and Chapter 12 ‘Ecology‘ the significance of effects in these assessments uses an
alternative method of attributing effects and therefore a different terminology is used.
18.2.3 In reality however, it is the operational residual effects which are of greater relevance as they are
generally permanent in nature whereas construction effects are often less significant due to their
temporary nature. A summary of operational residual effects are outlined below:
Ground Conditions and Contamination
18.2.4 Providing the mitigation measures identified above in Table 18.1 are implemented there will be no
significant long-term residual effects during operation on ground conditions, surface water and
groundwater.
Archaeology and Cultural Heritage
18.2.5 No mitigation measures are proposed at the operational stage as design measures have been
incorporated in to the Proposed Development, As such, the residual effect during operation is
considered to be of minor positive significance. Although the character of the High Street in its current
state will significantly change, the re-development of the Site and in part the High Street will ultimately
enhance views from the identified assets from the current view of a partly derelict site to the new
development.
Noise and Vibration
18.2.6 The operational effect of the Proposed Development has been assessed and with respect to noise
arising from development related traffic, the anticipated changes in traffic noise are such that residual
effects of negligible significance would arise. On this basis, no particular mitigation measures are
considered necessary.
18.2.7 It is likely that the Proposed Development will include external fixed plant items, and as such noise
emission limits have been derived based on the existing background noise level and the requirements
of the local authority. Providing that all plant is designed cumulatively to achieve the specified
performance standards as outlined above and detailed in Chapter 8 Noise and Vibration, then at worst
negligible residual effects would arise.
18.2.8 Deliveries may occur over 24 hours, however, given the mitigation measures that will form part of the
store’s management plan, the residual effects noise arising from deliveries, particularly those during the
night-time, are anticipated to be minimal.
18.2.9 An assessment of the suitability of the Site for residential use has also been undertaken, and
consideration has been given to the degree of mitigation that will be required to ensure appropriate
internal target values will be met. With the incorporation of appropriate measures it has been shown
that an adequate level of protection against noise will be achieved for future occupants of the proposed
dwellings. Consequently, the Site is considered to be appropriate for residential use.
Hornsey High Street Environmental Statement
00037791
18 | 23
Local Air Quality
18.2.10 The Proposed Development is predicted to give rise to small to imperceptible increases in nitrogen
dioxide concentrations and fine particulates. On completion the Proposed Development is considered
to have negligible residual effects on local air quality.
Water Resources and Flood Risk
18.2.11 Adoption of the mitigation measures outlined in Table 18.1 above would results an overall permanent,
direct, long term residual effect of negligible / minor negative to moderate positive significance is
anticipated during operation of the Proposed Development.
Daylight, Sunlight and Overshadowing
18.2.12 The main effects relating to daylight, sunlight and overshadowing relate to the availability of daylight
and sunlight to surrounding properties and the proposed new dwellings. As outlined in Table 18.1
above, no mitigation measures are proposed and the residual effects are assessed as being of
negligible to minor negative significance.
Ecology
18.2.13 The Proposed Development been assessed as delivering residual effects with probable confidence of
long term negligible significance assuming those construction phase mitigation measures (i.e.
construction of brown roofs, installing bird boxes) identified in Table 18.1 above are adopted.
Socio Economics
18.2.14 The Proposed Development will include opportunities for employment, helping to meet local
employment needs and provide the opportunity for people to live and work locally if they choose to do
so. Sainsbury’s have established programmes that will be used to encourage local recruitment and
retention. There is likely to be a direct, permanent, long term residual effect at the Borough level of
minor to moderate positive significance and a moderate positive effect at the Ward level.
18.2.15 Additional employment will arise from spend in the local economy by companies on site and those who
work in the area. New residents moving into the area will also bring benefits through spend in the local
economy, including Hornsey High Street. There is likely to be a direct, permanent, long term residual
effect at the Borough level of negligible to minor positive significance.
18.2.16 The scheme includes a significant proportion of social housing (42% based on habitable rooms) but
this is against a backdrop of significant need, therefore the magnitude of change is low. There is likely
to be a direct, permanent, long term residual effect at the Borough level of minor to moderate positive
significance.
18.2.17 The need to expand existing education and health facilities to accommodate planned growth has been
identified by the Borough and other stakeholders and a negligible residual effect on these is
anticipated. In the event that planned expansion does not take place before the Proposed
Development is complete, it is considered that there would be temporary short term effect at the local
level of minor to moderate negative significance on schools and negligible to minor negative
significance on health provision.
Transportation and Access
18.2.18 The residual effects resulting from the operation of the Proposed Development on pedestrian, cycle
and public transport networks are identified as being of permanent negligible significance. However,
secure and covered cycle parking will be provided on-site within the Proposed Development in
accordance with LBH and TfL cycle parking standards in order to encourage increased cycling levels to
and from the Site.
Hornsey High Street Environmental Statement
00037791
18 | 24
Townscape and Visual Impact
18.2.19 The design of the Proposed Development has carefully considered the townscape setting and context
and has been designed to reflect surrounding built form and character. Its stepped profile largely
enables the built form to directly connect in terms of scale and character to adjacent streets. It also
includes the use of street trees and vegetation to enhance the street scene for pedestrians.
18.2.20 The frontage to the High Street reflects the materials and character of the adjacent building on the High
Street, helping to enhance and improve the legibility of the street frontage at this point.
18.2.21 The overall Proposed Development which includes mitigation measures outlined in Table 18.1 is
considered to have an indirect, permanent, and long-term residual effect on townscape receptors
generally of negligible to moderate positive significance but ranging from moderate positive to minor
negative significance (worst-case scenario).
18.2.22 The overall Proposed Development which includes mitigation measures outlined in Table 18.1 is
considered to have an direct, permanent and long-term residual effect on visual amenity ranging from
moderate positive to minor - moderate negative (worst case scenario) significance.
Telecommunications
18.2.23 The assessment identified that the completed Proposed Development will result in negligible residual
effects to the reception of broadcast of television (digital) and radio signals. Potential residual effects
on Satellite TV and Radio were assessed as being of minor negative significance
Hornsey High Street Environmental Statement
00037791
18 | 25
Table 18.2: Summary of Residual Effects
Chapter
Ground Conditions
and Contamination
Stage of
Development
Description of Residual Effect
Construction
Operation
Archaeology and
Cultural Heritage
Construction
Major,
Moderate,
Minor,
Negligible
Positive /
Negative
Permanent /
Temporary
Direct /
Indirect
Short /
Medium /
Long
Term
Effect of Exposure to Contamination
associated with historic land use on
human health
Negligible
Negative
T
D
ST
Effect of Exposure to Contamination on
Third Party Occupants and Properties
Negligible
Negative
T
D
ST
Effect on Groundwater from existing
sources of contamination
Negligible
Negative
T
D
ST
Effect of Contamination on Potable
Water Supply
Negligible
Negative
T
D
ST
Effect of Contamination on Future Site
Occupants and Properties
Negligible
Negative
T
D
ST
Effect of Contamination on Third Party
Properties and Occupants
Negligible
Negative
T
D
ST
Effects on Surface and Groundwater
Negligible
Negative
T
D
ST
Truncation or loss of buried/surface
archaeological remains
Minor
Negative
P
D
LT
The great Northern Railway Tavern
69 High Street
Negligible
Negligible
Negative
Negative
T
T
I
I
ST
ST
71 High Street
Negligible
Negative
T
I
ST
Minor
Negative
T
I
ST
Monument to Samuel Rogers and
Family
Negligible
Negative
T
I
ST
Cattle Trough, drinking fountain and
cast Iron Lamp
Negligible
Negative
T
I
ST
Hornsey High Street Conservation Area
Minor
Negative
T
I
ST
Hornsey Water Works and Filter Beds
Minor
Negative
T
I
ST
Tower of Old Parish Church of St Mary
Hornsey High Street Environmental Statement
00037791
Significance of Residual Effects
18 | 26
Chapter
Stage of
Development
Description of Residual Effect
Significance of Residual Effects
Major,
Moderate,
Minor,
Negligible
Positive /
Negative
Permanent /
Temporary
Direct /
Indirect
Short /
Medium /
Long
Term
Hornsey High Street Public Baths and
Wash House
The great Northern Railway Tavern
Minor
Negative
P
D
LT
Minor
Positive
P
I
LT
69 High Street
Minor
Positive
P
I
LT
71 High Street
Minor
Positive
P
I
LT
Moderate
Positive
P
I
LT
Monument to Samuel Rogers and
Family
Minor
Positive
P
I
LT
Cattle Trough, drinking fountain and
cast Iron Lamp
Minor
Positive
P
I
LT
Hornsey High Street Conservation Area
Moderate
Positive
P
I
LT
Hornsey Water Works and Filter Beds
Conservation Area
Moderate
Positive
P
I
LT
Construction Noise
Minor/
Moderate
Negative
T
D
ST
Construction Vibration
Minor/
Moderate
Negative
T
D
ST
Operational road traffic
Negligible
N/A
P
D
LT
Fixed building services plant
Negligible
N/A
P
D
LT
Minor
Negative
P
D
LT
Generation of Dust and PM10 during Site
clearance and construction
Minor to
Negligible
Negative
T
D
ST-MT
Emissions to air of PM10 and NO2 from
construction vehicles leaving or
accessing the Site and site plant
Negligible
Negative
T
D
ST-MT
Conservation Area
Operation
Tower of Old Parish Church of St Mary
Noise and Vibration
Construction
Operation
Sainsbury’s food store
Local Air Quality
Construction
Hornsey High Street Environmental Statement
00037791
18 | 27
Chapter
Water Resources
and Flood Risk
Stage of
Development
Description of Residual Effect
Operation
Emissions from traffic & on-site energy
centre generated by the Proposed
Development
Construction
Contamination of surface water
Operation
Daylight, Sunlight
and Overshadowing
Construction
Operation
Ecology
Construction
Hornsey High Street Environmental Statement
00037791
Significance of Residual Effects
Major,
Moderate,
Minor,
Negligible
Positive /
Negative
Permanent /
Temporary
Direct /
Indirect
Short /
Medium /
Long
Term
NO2 –
Negligible
PM10 Negligible
Negative
P
D
LT
Negligible to
Minor
Negative
T
D
ST
Effects on Moselle Brook
Negligible
-
-
-
-
Potential Contamination of Surface
Waters
Negligible
Negative
P
D
LT
Alteration of the Drainage Regime and
Flood Risk
Moderate
Positive
P
I
LT
Increased Water Usage and Demand
Negligible
Negative
P
D
LT
Increased Pressure on Foul Sewerage
Infrastructure
Negligible
Negative
P
D
LT
Neighbouring Daylight & Sunlight
N/A
N/A
N/A
N/A
N/A
Internal Daylight Adequacy
N/A
N/A
N/A
N/A
N/A
Overshadowing
N/A
N/A
N/A
N/A
N/A
Neighbouring Daylight & Sunlight
Negligible/Minor
Negative
P
D
LT
Internal Daylight Adequacy
Negligible/Minor
Negative
P
D
LT
Overshadowing
Negligible/Minor
Negative
P
D
LT
Effect on St Mary’s churchyard SLINC
as a result of dust generation
Negligible
N/A
N/A
N/A
N/A
Effect on other non-statutory designated
sites within 400m as a result of dust
generation
Negligible
N/A
N/A
N/A
N/A
Effect of noise upon non-statutory
designated sites within 400m
Negligible
N/A
N/A
N/A
N/A
18 | 28
Chapter
Stage of
Development
Description of Residual Effect
Major,
Moderate,
Minor,
Negligible
Positive /
Negative
Permanent /
Temporary
Direct /
Indirect
Short /
Medium /
Long
Term
District
(Moderate)
Negative
T
D
MT
Negligible
N/A
P
N/A
LT
Site (Minor)
Negative
T
D
MT
Negligible
N/A
P
N/A
LT
Effect of disturbance of Japanese
knotweed
Negligible
N/A
N/A
N/A
N/A
Operation
Effect upon non-statutory designated
sites within 400m as a result of
increased recreation.
Negligible
N/A
N/A
N/A
N/A
Construction
Direct on-site employment
Minor to
Moderate
Positive
T
D
ST
Indirect and induced employment
Minor to
Moderate
Positive
T
I
ST
Direct on site employment
Minor to
Moderate
Positive
P
D
LT
Indirect and induced employment
Negligible
Positive
P
I
LT
Increase in housing stock
Minor to
moderate
Positive
P
D
LT
Effect on primary and secondary
schools
Minor to
moderate
(worst case)
Negative
T
I
ST
Effect on GPs and Dentists
Negligible to
minor
(worst case)
Negative
T
I
ST
Negligible to
minor positive
Positive
P
D
LT
Effect upon Black Redstart
Effect upon other breeding birds
Socio Economics
Operation
Spending from the new community in
the local economy
Hornsey High Street Environmental Statement
00037791
Significance of Residual Effects
18 | 29
Chapter
Transportation and
Access
Stage of
Development
Description of Residual Effect
Construction
Operation
Townscape and
Visual Impact
Construction
Major,
Moderate,
Minor,
Negligible
Positive /
Negative
Permanent /
Temporary
Direct /
Indirect
Short /
Medium /
Long
Term
Effect of Vehicle Trips on the Local
Road Network
Minor
Negative
T
D
ST
Effect on Pedestrian Access
Minor
Negative
T
D
ST
Pedestrians / Cyclists
Negligible
Negative
P
D
LT
Bus Journeys
Negligible
N/A
P
D
LT
Rail Journeys
Negligible
N/A
P
D
LT
Traffic Generation – Operational Phase
Negligible
N/A
P
D
LT
Connectivity, movement and public
open space within the Site
Negligible
N/A
T
D
ST
Hornsey High Street Conservation Area
Moderate
negative
T
D
ST
Hornsey Water Works and Filter Beds
Conservation Area
Moderate
negative
T
I
ST
Hillfield Conservation Area
Minor moderate
negative
T
I
ST
Campsbourne Conservation Area
Minor
negative
T
I
ST
Setting of Alexandra Park Registered
Park and Garden and Conservation
Area
Minor
negative
T
I
ST
The great Northern Railway Tavern
Moderate
negative
T
I
ST
69 High Street
Moderate
negative
T
I
ST
71 High Street
Minor moderate
negative
T
I
ST
Tower of Old Parish Church of St Mary
Minor moderate
negative
T
I
ST
Minor
negative
T
I
ST
Moderate
negative
T
I
ST
Monument to Samuel Rogers and
Family
Cattle Trough, drinking fountain and
cast Iron Lamp
Hornsey High Street Environmental Statement
00037791
Significance of Residual Effects
18 | 30
Chapter
Stage of
Development
Description of Residual Effect
Major,
Moderate,
Minor,
Negligible
Positive /
Negative
Permanent /
Temporary
Direct /
Indirect
Short /
Medium /
Long
Term
Moderate
negative
T
I
ST
Minor
negative
T
D
ST
Moderate
negative
T
I
ST
Townscape character area 4: West of
Nightingale Lane
Minor
negative
T
I
ST
Townscape character area 5: Hornsey
High Street
Moderate
negative
T
I
ST
Townscape character area 6: Hillfield
Residential Area
Minor
Negative
T
I
ST
Townscape character area 7: Road
Residential Area
Minor
Negative
T
I
ST
Negligible
N/A
T
I
ST
Negligible to
moderate major
Negative
T
I
ST
Minor
Positive
P
D
LT
Hornsey High Street Conservation Area:
character & setting
Moderate
Positive
P
D
LT
Hornsey High Street Conservation Area:
views out
Minor
Negative
P
D
LT
Minor moderate
Positive
P
I
LT
Minor-moderate
Negative
P
I
LT
Negligible
N/A
P
I
LT
Townscape character area 1: New River
Avenue Residential
Townscape character area 2: Cross
Lane Light Industrial
Townscape character area 3: Boyton
Road and Miles Road Residential Area
Townscape character area 8:
Transportation Corridor
Visual receptors
Operation
Connectivity, movement and public
open space within the Site
Hornsey Water Works and Filter Beds
Conservation Area
Hillfield Conservation Area
Campsbourne Conservation Area
Hornsey High Street Environmental Statement
00037791
Significance of Residual Effects
18 | 31
Chapter
Stage of
Development
Description of Residual Effect
Major,
Moderate,
Minor,
Negligible
Positive /
Negative
Permanent /
Temporary
Direct /
Indirect
Short /
Medium /
Long
Term
Negligible minor
Positive
P
I
LT
The great Northern Railway Tavern
Minor
Positive
P
I
LT
69 High Street
Minor
Positive
P
I
LT
71 High Street
Minor
Positive
P
I
LT
Tower of Old Parish Church of St Mary
Minor
Positive
P
I
LT
Negligible minor
Positive
P
I
LT
Minor
Positive
P
I
LT
Moderate
Positive
P
I
LT
Negligible minor
Positive
P
D
LT
Townscape character area 3: Boyton
Road and Miles Road Residential Area
Minor
Positive
P
I
LT
Townscape character area 4: West of
Nightingale Lane
Minor
Positive
P
I
LT
Townscape character area 5: Hornsey
High Street
Minor
Positive
P
I
LT
Townscape character area 6: Hillfield
Residential Area
Minor
Negative
P
I
LT
Townscape character area 7: Road
Residential Area
Negligible minor
Positive
P
I
LT
Townscape character area 8:
Transportation Corridor
Negligible
N/A
P
I
LT
Visual receptors
Moderate
Negative &
positive
P
I
LT
Setting of Alexandra Park Registered
Park and Garden and Conservation
Area
Monument to Samuel Rogers and
Family
Cattle Trough, drinking fountain and
cast Iron Lamp
Townscape character area 1: New River
Avenue Residential
Townscape character area 2: Cross
Lane Light Industrial
Hornsey High Street Environmental Statement
00037791
Significance of Residual Effects
18 | 32
Chapter
Telecommunications
Stage of
Development
Description of Residual Effect
Construction
TV and Radio reception
Operation
Major,
Moderate,
Minor,
Negligible
Positive /
Negative
Permanent /
Temporary
Direct /
Indirect
Short /
Medium /
Long
Term
Minor
Negative
T
D
ST
Broadcast TV
Negligible
N/A
T
D
ST
Broadcast Radio
Negligible
N/A
T
D
ST
Minor
Negative
T
D
ST
Satellite TV and radio
Hornsey High Street Environmental Statement
00037791
Significance of Residual Effects
18 | 33

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