the control of dust and emissions from construction and demolition

the control of dust and emissions from construction and demolition
Method Statement For
THE CONTROL OF DUST AND EMISSIONS
FROM CONSTRUCTION AND DEMOLITION
(Code of Construction Conducts)
FOR
2 Chesnut Road, London. N17 9EN
Rev B
June 2017
149a Clapton Common | London | E5 9AE
Tel: 0208 800 6939
1
Contents
1- Introduction..................................................................................................................................................... 3
2- Project Description.......................................................................................................................................... 3
3- Air Quality Impact Evaluation .......................................................................................................................... 3
3.1 Location of Site ......................................................................................................................................... 4
4. The Site .......................................................................................................................................................... 4
4.1 Working Hours .......................................................................................................................................... 4
4.2 High Impact Hours .................................................................................................................................... 4
5.0 Training......................................................................................................................................................... 5
5.1 Legislation ................................................................................................................................................ 5
5.2 Codes of practice ...................................................................................................................................... 5
5.2.1 Electrical codes of practice ..................................................................................................................... 5
6.0 Demolition..................................................................................................................................................... 6
6.1 Asbestos................................................................................................................................................... 7
6.2 Risk Assessment for Demolition Works ..................................................................................................... 7
7.0 General Waste Handling ............................................................................................................................... 8
7.1 Contaminated Land................................................................................................................................... 9
8.0 Emission, Dust Mitigation & Control Measures .............................................................................................. 9
8.1 Site planning: .......................................................................................................................................... 11
8.2 Classification .......................................................................................................................................... 12
8.3 Air Quality Dust Risk Assessment ........................................................................................................... 14
8.4 Fencing and Hoarding............................................................................................................................. 24
8.5 Painting the Hoardings ............................................................................................................................ 25
8.6 Measures to minimise the impact of construction activities ...................................................................... 25
8.7 Measures Specific to Track out .............................................................................................................. 25
8.7.1 Wheel Washing ............................................................................................................................... 25
8.7.2 Covering The Vehicles ..................................................................................................................... 26
8.7.3 Haul Routes..................................................................................................................................... 26
9.0 Local Suppliers ........................................................................................................................................... 26
10.0 Public Transport ........................................................................................................................................ 27
10.1 Avoiding Peak Hour Deliveries .............................................................................................................. 27
11.0Noise ......................................................................................................................................................... 27
11.1 Requirements under the law:................................................................................................................. 30
11.2 Using hearing protection effectively: ...................................................................................................... 31
12.0 Vibration ................................................................................................................................................... 32
13.0 Construction Lighting and Measures to Minimise Light Pollution ................................................................ 33
14.0 Communication Strategy and Neighbour Liaison ....................................................................................... 34
14.1 Complaints Procedures ......................................................................................................................... 35
14.3 Environmental Code of Construction ..................................................................................................... 35
14.4 Documentation...................................................................................................................................... 35
14.5 Dealing with Complaints ........................................................................................................................ 35
15.0 Review and Update ................................................................................................................................... 35
2
1- Introduction
The purpose of this method statement is to ensure that the emission and adverse effects of dust are
minimised during the demolition & construction period. Also, The Code follows a methodical approach
to construction works and sets standards to be followed by the Principal Contractor during the
construction of Proposed Development at 2 Chesnut Road, London. N17 9EN.
2- Project Description
The scheme consists of demolition of all existing structures on the site with the exception of the front
facade of the original 19th Century Victorian villa, which is to be retained and restored. Behind this and
facing onto Rycroft Way to the east will be a new development between three and four-storeys in height
plus basement for the use as student accommodation. This Proposal consists of a total of 64 individual
rooms (including 2 rooms for disabled persons, with potential for two more) and associated communal
kitchen and living areas for the students.
3- Air Quality Impact Evaluation
A site evaluation should be conducted before any work activities begin on site. This should assess the
likely impact of a development, based on size and location, will have on local air quality both inside and
outside the site boundary. This applies to all proposed construction activities, including demolition, site
clearing and construction phases.
To successfully control demolition and construction activity, it is important to evaluate the risk from
pollutants emitted from site. It is envisaged that this approach will bring additional benefits, such as a
reduction in the number of nuisance complaints; the majority of which relate to dust and noise emitted
from construction activities.
3
3.1 Location of Site
4. The Site
The construction site, with an address of 2 Chestnut Road is located to the rear of Tottenham Police
Station, which is on the High Road, and faces onto Chestnut Road with its shorter north boundary. The
principal eastern boundary is on to Rycroft Way.
4.1 Working Hours
All construction works will be carried out during the hours of 0800 to 1700hrs Monday to Friday and no
working on Saturdays , Sundays or bank holidays.
4.2 High Impact Hours
No work will be carried out caused ‘high impact activities’ such as demolition and concrete-breaking
works:
9am to noon and 2pm to 5.30pm, Monday to Friday
At no time Saturdays, Sundays and Public/Bank Holidays
4
5.0 Training
All operatives are adequately trained to carry out required tasks.
Site Foreman is SSSTS approved.
Site Managers are SMSTS approved.
All site operatives hold current certification and have the following training:
• CSCS certification
• Stepladder training
• Working at heights training
• Asbestos awareness training
• Abrasive wheels training
• ECS certification
5.1 Legislation
• Health and Safety Work Act 1974
• The Management of Health and Safety at Work Regulations 1999, amendment 2006
• Workplace (Health, Safety and Welfare) Regulations 1992
• The Control of Asbestos Regulations 2012
• Provision and Use of Work Equipment Regulations (PUWER) 1998
• The Reportable Injuries Diseases & Dangerous Occurrence Regulations 2013 (RIDDOR)
• Control of Substances Hazardous to Health Regulations 2002
• The Work at Height Regulations 2005
• The Personal Protective Equipment at Work Regulations 2002
• The Manual Handling Operations Regulations 1992
• The Construction (Design and Management) Regulations 2015
• The Management of Health and Safety at Work Regulations 2006
• Electricity at Work Regulations 1989
5.2 Codes of practice
5.2.1 Electrical codes of practice
• BS EN 61439 2009 - 2012 Low-voltage switchgear and control gear assemblies.
• BS 5266 Parts 1-10 & BS EN 50172 1999 - 2008 Code of practice for emergency lighting.
• BS 5424 Parts 2 and 3, and IEC 60158 part 3 1985 - 1988 Specification for low voltage control gear.
• BS EN 60422 2008 Monitoring and maintenance guide for mineral insulating oils in electrical
equipment.
5
• BS EN 60079-30-2 2007 Electric surface heating.
• BS 6423 1983 Code of practice for maintenance of electrical switchgear and control gear for voltages
up to and including 1 kV.
• BS 6626 2010 Code of practice for maintenance of electrical switchgear and control gear for voltages
above l kV and up to and including 36 kV.
• BS EN 62305, 4 parts 2006-2011 Code of practice for protection of structures against lightning.
• BS 7375 2010 Code of practice for distribution of electricity on construction and building sites.
• BS 7430 1998 Code of practice for earthling.
• BS 7671 2008 - 2015 Requirements for electrical installations. IEE Wiring Regulations. Seventeenth
edition.
• BS 7909 2008 - 2011 Code of practice for temporary electrical systems for entertainment and related
purposes.
• BS EN 50110 Parts 1- 2, 2004 - 2010 Operation of electrical installations.
• IEC 60479 Parts 1-4, & PD6519 1994-2005 Guide to effects of current on human beings and
livestock.
• BS EN 60529 1992 Specification for degrees of protection provided by enclosures (IP code).
• BS EN 60947 Parts 1-8 2001 - 2011 Specification for low voltage switch gear and control gear.
6.0 Demolition
The Building Control Team of the relevant local authority will be notified of any building demolition
works under sections 80 and 81 of the Building Act 1984.
Demolition may commence after six weeks has elapsed from the submission of the notification or after
the local authority has issued a counter notice, which will require certain tasks to be carried out
Developers should consider referring to the demolition protocol set up by the ICE (Institution of Civil
Engineers) and CIWM (Institute of Waste Management) 14. This protocol provides best practice on
aspects such as building audits and use of recycled materials to be reused on site or elsewhere.
The contractor shall comply with the code `The Control of Dust & Emission from Construction
&Demolition`. Available on the below link;
https://www.london.gov.uk/file/18750/download?token=zV3ZKTpP
6
Figure 1: PPE Requirement
6.1 Asbestos
For sites with potentially asbestos-containing materials, An independent professional should approve
the statement to ensure that no person at work or member of public is exposed to a harmful release of
asbestos during works, A check will be carried out to ascertain whether asbestos, man-made mineral
fibres (MMMF) or other deleterious materials exist and include in the system of work proposed manner
of disposal of same.
6.2 Risk Assessment for Demolition Works
Activity: What is the
Hazard?
Harm: Who or
What?
Public entering the site
Injury the person
Gas / Electric
Explosion / fire / Shock
Working at Height / Falls
Injury to person
from height
Slips / Trips
Injury to person
Road users and
pedestrians during
movement of lorries
Injury to person
General Site Hazards
including dust, cuts etc..
Injury to person
Control Measures
Site to be securely fenced off and
locked at end of working day. Signage
warning of danger.
Services to be disconnected prior
demolition works and confirmed as
disconnected by licensed person only.
Use scaffolding
Use fall arrest system
Implement good housekeeping, all trip
hazard to be removed
Use of banks man all the times,
warning signs and where required
physical barriers.
Use of PPE all the times, dust
suppression system planned, full site
coverage of water mist when
required.
Risk
Level
Medium
High
High
Medium
Low
Medium
7
Manual Handling
Injury to person
Falling Masonry
uncontrolled collapse
Site operatives ,
possible public
Working around or
causing construction
dust
Site operatives ,
Working in areas where
asbestos could be
present
Site operatives ,
possible public
Using portable hand
tools
Site operatives ,
Use of abrasive wheels
Using vibrating
machinery
Using ladders
Site operatives ,
Site operatives ,
Site operatives ,
All the time to be checked before
manual handling.
During the soft strip, structural
stability of the building to be assessed
by the structural engineer, if any
section of the building is deemed at
risk then all person to be evacuated,
mechanical means to be used and
make safe all areas
Consider using a different method of
work altogether when operating tools
that create dust
Lung cancer, silicosis, Chronic
Obstructive Pulmonary Disorder or
asthma caused through inhaling
construction dust
Inspections on site should be carried
out before commencing work, if
asbestos is identified, or suspected,
work should be suspended and site
supervisor made aware
All operatives to be trained in the safe
use of hand tools before starting
works and have necessary
experience to use each hand tool
Only operatives with training and
authorised to use abrasive
wheel tools should undertake work
Where possible, try eliminate or
reduce exposure to the lowest
reasonably practicable level
All workers should have sufficient
training and competency in
using vibrating machinery
All users are trained in the safe use of
ladders and working at
height
Low
Medium
Medium
High
Low
Low
Low
Low
7.0 General Waste Handling
A suitable route to transport waste must be considered prior to the work.
The waste route should be segregated using barrier fencing with suitable signage to direct the public to
the alternative pathway and prevent unauthorised persons accessing the waste route.
Ensure the correct PPE is worn when handling waste.
Always use a mechanical means of moving waste whenever possible (e.g. wheel barrow).
8
Use good manual handling techniques when mechanical assistance is not practical or safe.
Always dispose of waste in accordance with principle contractor’s environmental policy and waste
Management plan.
Report any environmental waste accidents or spillages immediately to the principle contractor who will
put into action the emergency waste containment plan and inform the relevant authorities. A spill kit will
be carried on site all times.
7.1 Contaminated Land
It will be required during the works to implement measures to prevent the contamination of the ground
or watercourse by fuels, plant, equipment, materials or human waste. Freed Construction will ensure
that all waste is managed on site and removed by a registered waste contractor to a licensed site
authorised to receive the waste. Any fuels, oils or other chemicals that are to be stored onsite shall be
contained within an impervious bund.
Land can be contaminated in many ways including leakage, accidental spillage or uncontrolled waste
disposal. Contaminated Land is defined under the Environmental Protection Act as land in such
condition by reason of substances in, on or under the land, that significant harm is being caused, or
there is a significant possibility of such harm being caused, or pollution of controlled waters is being, or
is likely to be caused.
Where contaminated land is identified, the principal contractor must contact local authority.
8.0 Emission, Dust Mitigation & Control Measures
Freed Construction will take all necessary measures to avoid creating a dust nuisance during both
construction and demolition works. Best practicable means will be used to minimise dust. We will be
required to follow the THE CONTROL OF DUST AND EMISSIONS DURING CONSTRUCTION AND
DEMOLITION SUPPLEMENTARY PLANNING GUIDANCE and adopt dust control measures for large
sites of strategic importance as follows
•
Developers will need to ensure that all contractors follow best practice at all times to control
and limit emissions of gaseous and particulate pollutants into the atmosphere from construction
and demolition activities, including from vehicles and plant
•
Developers should follow the site management practices to ensure that the site is responsibly
managed during the demolition and construction phases of the development.
•
Contact details for the person responsible for dust and emissions generated from the site
should be displayed on the site boundary so that local residents and businesses are able to
contact the developer and/or contractor to raise any issues that they may have and report
complaints.
•
The developer and contractor are to actively monitor the site to ensure the control of dust and
emissions. Dry and windy conditions increase the likelihood of dust and emissions being
produced and dispersed, so extra site monitoring should take place during these times.
9
•
When planning their construction works developers should aim to:
a. Locate machinery and dust generating activities away from receptors;
b. Create a physical distance and/or barrier between dust/emission generating activities
and receptors;
c. Install solid screens or barriers around dust generating activities. These should be at
least as high as any stockpiles on-site;
d. Cover or seed stockpiles to prevent wind whipping; and
e. Remove loose materials as soon as possible.
•
The site or construction area should be bunded to prevent runoff. Runoff and mud should be
avoided as it can lead to dust once dry as well as polluting local waterways and sewers14
•
Hoardings, fencing, barriers and scaffolding should be regularly cleaned using wet methods,
where possible to prevent re-suspension of particulate
matter. Developers should collect used water and maximise the use of recycled and nonpotable water;
•
Regular checks of buildings within 100 m of the site boundary should be carried out to check
for soiling due to dust with cleaning carried out where necessary; and
•
Require a change of shoes and clothes by staff and visitors before going off-site to reduce the
transport of dust or provide cleaning facilities such as showers or boot cleaners.
•
Spillages can occur with a wide range of liquid and materials, including those which are
hazardous. For all sites the following measures will address this issue: Use bunded areas
wherever practicable;
a) Regularly inspect the site area for spillages;
b) Have spillage kits readily available;
c) Clean spillages using agreed wet handling methods;
d) Vacuum or sweep regularly to prevent the build up of fine waste dust material, which
has spilled on the site and is designated as waste that is no longer
e) fit for use - this should be dealt with in accordance with the Waste Management
Licensing Regulations (WMLR), 1994.
•
All mobile vehicles associated with the demolition / construction should comply with the
standards of the London Low Emission Zone. For HGVs, the standard is Euro IV for PM and for
heavier vans and mini buses it is Euro 3. Local authorities may introduce tighter emission
standards for particular sites should local circumstances require these. More information can
be found at www.tfl.gov. uk/lez.
•
The site should be managed so that vehicles do not have to wait to park safely. However,
should vehicles have to wait they should not idle. Generally, if a vehicle is stationary for more
than a minute, turning off the engine will reduce emissions and fuel costs.
•
Measures set out in travel plans include schemes that encourage workers not to use singleoccupancy cars to travel to and from work but instead to cycle, walk, use public transport or car
share. Reducing car miles not only reduces emissions but can produce financial benefits and
productivity improvements, saving both the business and its staff money and time. DfT has
10
produced guidance on Workplace Travel Plans at: www.dft.gov.uk/pgr/sustainable/
travelplans/work/essentialguide.pdf
•
Ideally, cutting, grinding and sawing should not be conducted on-site and pre-fabricated
material and modules should be brought in where possible. In cases where such work must
take place, spraying water, preferably from a water efficient spray pump, over the material as it
is being cut greatly reduces the amount of dust generated.
•
Skips, chutes and conveyors should be completely covered and, if necessary, completely
enclosed to ensure that dust does not escape. Similarly, drop heights should be minimised to
control the fall of materials.
•
Following earthwork activities it is important to reduce the generation and resuspension of dust
through re-vegetating exposed areas and soil stockpiles to stabilise surfaces. Where this is not
possible, use hessian and/or mulches to re-vegetate or cover with topsoil.
•
It is important that cement, sand, fine aggregates and other fine powders are sealed after use
and if necessary stored in enclosed or bunded containers or silos. Some materials should be
kept damp to reduce the risk of drying out.
•
Unpaved haul routes can account for a significant proportion of fugitive dust emissions,
especially in dry or windy conditions, when the generation of dust through the movement of
vehicles is exacerbated. It is recommended that to comply with good practice, developers
should as far as possible ensure that hard surfaces or paving are used for all haul routes, even
if routes are temporary.
•
It is important that haul routes and local access roads are kept free of dust as far as possible
and are swept regularly. Where possible, this should be water-assisted to increase damping
down. However, care should be taken to not to contaminate sewers or local waterways.
•
Vehicles – in particular wheels – should be washed or cleaned before leaving the site. At low
risk sites, this might be by means of hosing, but at most sites wheel wash facilities should be
installed, preferably with the application of rumble grids to dislodge accumulated dust and mud.
Ideally the route from the wheel wash to the public road should be a paved. Where layout
permits, the site access gates should be located at least 10m from receptors.
•
All vehicles carrying dusty materials should be securely covered before leaving the site, to
prevent dust spilling on the road and being swept away by the wind .
8.1 Site planning:
• Erect solid barriers to site boundary in dust sensitive locations
• No bonfires
• Plan site layout – work compounds will be laid out so that accesses and loading areas and
machinery and dust causing activities are located as far away from sensitive receptors as
practicable so that where practicable temporary structures screen these activities
• All site personnel to be fully trained
11
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Trained and responsible manager on site during working times to undertake observations of dust
and weather conditions, maintain a site logbook and carry out site inspections
Hard surface site haul routes
Put in place dust monitors at the perimeter of the site; and
All vehicles will switch off engines, no idling.
All loads entering and leaving site will be covered.
Site will not runoff water or mud on to the public highway.
Water will be used as a dust suppressant on site.
Cutting equipment will use water as a dust suppressant.
Rubbish skips will be covered.
Dust generating activities will be minimised.
Hard surfaces and haul routes will be regularly cleaned and maintained.
Mechanical sweepers will be employed as required.
All personnel will be inducted and / or trained as required.
Visual monitoring will be carried out on an ongoing basis.
We will always endeavour to operate with best practical means at all times.
Set site speed limits (5mph).
8.2 Classification
The scale of potential dust emissions from this phase should be determined using the following criteria.
Developers should use the highest category their development falls within
Classification
Type
Large
Medium
Small
Criteria
Total volume of building to be demolished >50,000m3 , or
potentially dusty construction material (e.g. concrete), or
on-site crushing and screening, or demolition activities >20m above ground
level;
Total volume of building to be demolished 20,000m3 – 50,000m3 , or
potentially dusty construction material, or
demolition activities 10-20m above ground level;
total volume of building to be demolished <20.000m3 or
construction material with low potential for dust release (e.g. metal cladding or
timber), or
demolition activities <10m above ground demolition during wetter months.
Figure 2: Dust Management Assessment and Mitigation Flow Chart.
12
13
8.3 Air Quality Dust Risk Assessment
The Dust Emission Magnitude
The table DRA1 indicates dust emission magnitude by phases which was prepared based on STEP
2A of the Dust And Emissions During Construction And Demolition Supplementary Planning
Guidance.
Table DRA1
ACTIVITY
Demolition Phase
Earthworks Phase
Construction Phase
Trackout Phase
DUST EMISSION
MAGNITUDE
N/A
REASON
There is no demolition works on the
site.
Small
Total site area is approx. 824sqm
which is <2,500sqm.
Small
Total building volume is approx.
10,800 m3 which is <25,000m3.
Small
Unpaved road length <50m and
expected daily HDV trips <10.
Sensitivity Of The Area To Dust And Soiling Effects On People And Property
The Table DRA2 indicates surrounding buildings with distance from the construction site, sensitivity
to dust soiling effects, number of receptors and the risk category for dust and soiling effects on
people and property.
The sensitivities of the buildings were determined based on STEP 2B of the Dust And Emissions
During Construction And Demolition Supplementary Planning Guidance.
The risk categories of the buildings were determined based on the STEP2C of the Dust And
Emissions During Construction And Demolition Supplementary Planning Guidance.
14
Table DRA2
Building
Distance From
The
Construction
Site
Sensitivity To Number
Dust Soiling
of
Effects
Receptors
RISK Category
Tottenham Police
Station
North London
College
Council Building
for Workshops
Holy Trinity
Primary School
Performance
Center
<20m
Low
>100
Low
<50m
Medium
>100
Low
<75m
Low
>100
Low
<75m
Medium
>100
Low
<75m
High
>100
Low
Church
<75m
Medium
>100
Low
Various
High
1
Medium & Low
Dwellings
Table DRA3 - SENSITIVITY OF THE AREA TO DUST AND SOILING EFFECTS ON PEOPLE AND
PROPERTY
(Source: Control Of Dust And Emissions During Construction And Demolition Supplementary Planning Guidance)
Receptor
Sensitivity
High
Distance from the Source (m)c
<20
<50
<100
<350
>100
High
High
Medium
Low
10-100
High
Medium
Low
Low
Medium
Low
Low
Low
Low
Low
Low
Low
Number of Receptors
1-10
Medium
>1
Low
>1
Medium
Low
Low
Low
SENSITIVITY OF THE AREA TO HUMAN HEALTH IMPACTS
15
The Table DRA4 indicates surrounding buildings with distance from the construction site, sensitivity
to dust soiling effects, number of receptors and the risk category for human health impacts.
The sensitivities of the buildings were determined based on STEP 2B of the Dust And Emissions
During Construction And Demolition Supplementary Planning Guidance.
The risk categories of the buildings were determined based on the STEP2C of the Dust And
Emissions During Construction And Demolition Supplementary Planning Guidance.
Annual Mean PM10 concentration was assumed 32 µg/m3 for the construction site location as per
Air Quality Updating and Screening Assessment for 2014 London Borough Of Haringey report.
Table DRA4
Building
Tottenham Police
Station
Distance
Sensitivities Of
From The
People To The
Construction Health Effects Of
Site
PM10
Number of
Receptors
RISK Category
<20m
High
>100
High
<50m
High
>100
High
<75m
Medium
>100
Low
<75m
High
>100
Medium
Performance Center
<75m
Medium
>100
Low
Church
<75m
High
>100
Medium
Various
High
1
High & Medium &
Low
North London
College
Council Building for
Workshops
Holy Trinity Primary
School
Dwellings
16
Table DRA5 - SENSITIVITY OF THE AREA TO HUMAN HEALTH IMPACTS
(Source: Control Of Dust And Emissions During Construction And Demolition Supplementary Planning Guidance)
Receptor
Sensitivity
High
Annual
Mean PM10
concentration C
>32 µg/m3
Number of
Receptors D
24-28
µg/m3
24-28
µg/m3
<20
<50
<100
<200
<350
>100
High
High
High
Medium
Low
High
High
Medium
Low
Low
1-10
High
Medium
Low
Low
Low
>100
High
High
Medium
low
Low
10-100
High
Medium
Low
Low
Low
1-10
>100
High
High
Medium
Medium
Low
Low
Low
Low
Low
Low
10-100
High
Medium
Low
Low
Low
1-10
Medium
Low
Low
Low
Low
>100
Medium
Low
Low
Low
Low
10-100
1-10
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
10-100
28-32
µg/m3
Distance from the Source (m)E
Medium
-
>10
High
Medium
Low
Low
Low
Low
-
1-10
1-10
Medium
Low
Low
Low
Low
Low
Low
Low
Low
Low
17
SENSITIVITY OF THE AREA TO ECOLOGICAL IMPACTS
A visual survey has been made to determine locations and sensitivities of the surrounding ecological
receptors. The receptors’ sensitivities are low as per descriptions of chapter iii Sensitivities of
Receptors to Ecological Effects in the Control Of Dust And Emissions During Construction And
Demolition Supplementary Planning Guidance.
The ecological impact risk is in the low risk category since the receptor sensitivities are low.
Please see Detailed Map for Dust Risk Assessment (DRA) – Part2 for the ecological receptor’s
locations and distance from the construction site.
Table DRA6 - SENSITIVITY OF THE AREA TO ECOLOGICAL IMPACTS
(Source: Control Of Dust And Emissions During Construction And Demolition Supplementary Planning Guidance)
Receptor
Sensitivity
High
Medium
Low
Distance from the Source (m)c
<20
<50
High
Medium
Medium
Low
Low
Low
THE OUTCOME OF DEFINING THE SENSITIVITY OF THE AREA
The table DRA7 indicates Sensitivity of the Surrounding Area according the dust soiling, human
health and ecological impacts.
Table DRA7
Receptor
Sensitivity
Sensitivity of the Surrounding Area
Demolition
Earthworks
Construction
Trackout
Dust Soiling
N/A
Medium
Low
Low
Human Health
N/A
High
High
High
Ecological
N/A
Low
Low
Low
SUMMARY DUST RISK TABLE TO DEFINE SITE-SPECIFIC
A site specific dust risk table is located below which was prepared based on Table 4.6, Table 4.7, Table
4.8, and Table 4.9 of the Dust And Emissions During Construction And Demolition Supplementary
Planning Guidance.
This table briefly indicates that the site is a low risk site for the dust impacts.
Table DRA8
Potential Impact
Risk
Demolition
Earthworks
Construction
Trackout
Dust Soiling
N/A
Low Risk
Low Risk
Low Risk
Human Health
N/A
Low Risk
Low Risk
Low Risk
Ecological
N/A
Negligible
Negligible
Negligible
19
21
MEASURES RELEVANT FOR DEMOLITION, EARTHWORKS, CONSTRUCTION AND TRACK- OUT
As the 2 Chesnut Road Project is in low dust risk category, the following measures will be adopted as
per the Appendix 7 Air Quality Control Of Control Of Dust And Emissions During Construction And
Demolition Supplementary Planning Guidance.
SITE MANAGEMENT
o Display the name and contact details of person(s) accountable for air quality pollutant
emissions and dust issues on the site boundary.
o Display the head or regional office contact information.
o Record and respond to all dust and air quality pollutant emissions complaints.
o Make a complaints log available to the local authority when asked.
o Carry out regular site inspections to monitor compliance with air quality and dust control
procedures, record inspection results, and make an inspection log available to the local
authority when asked.
o Increase the frequency of site inspections by those accountable for dust and air quality
pollutant emissions issues when activities with a high potential to produce dust and emissions
and dust are being carried out, and during prolonged dry or windy conditions.
o Record any exceptional incidents that cause dust and air quality pollutant emissions, either on
or off the site, and the action taken to resolve the situation is recorded in the log book.
PREPARING AND MAINTAINING THE SITE
o Plan site layout: machinery and dust causing activities should be located away from receptors.
o Erect solid screens or barriers around dust activities or the site boundary that are, at least, as
high as any stockpiles on site.
o Fully enclosure site or specific operations where there is a high potential for dust production
and the site is active for an extensive period.
o Avoid site runoff of water or mud.
o Keep site fencing, barriers and scaffolding clean using wet methods.
o Remove materials from site as soon as possible.
OPERATING VEHICLE/MACHINERY AND SUSTAINABLE TRAVEL
o Ensure all on-road vehicles comply with the requirements of the London Low Emission Zone.
o Ensure all non-road mobile machinery (NRMM) comply with the standards set within this
guidance.
o Ensure all vehicles switch off engines when stationary – no idling vehicles.
o Avoid the use of diesel or petrol powered generators and use mains electricity or battery
powered equipment where possible.
o Impose and signpost a maximum-speed-limit of 10mph on surfaced haul routes and work areas
(if long haul routes are required these speeds may be increased with suitable
o additional control measures provided, subject to the approval of the nominated undertaker and
with the agreement of the local authority, where appropriate).
o Implement a Travel Plan that supports and encourages sustainable travel (public transport,
cycling, walking, and car-sharing).
o Only use cutting, grinding or sawing equipment fitted or in conjunction with suitable dust
suppression techniques such as water sprays or local extraction, e.g. suitable local exhaust
ventilation systems.
o Ensure an adequate water supply on the site for effective dust/particulate matter mitigation
(using recycled water where possible).
o Use enclosed chutes, conveyors and covered skips.
o Minimise drop heights from conveyors, loading shovels, hoppers and other loading or handling
equipment and use fine water sprays on such equipment wherever appropriate.
o Waste management
o Reuse and recycle waste to reduce dust from waste materials
o Avoid bonfires and burning of waste materials.
MEASURES SPECIFIC TO CONSTRUCTION
o Avoid scabbling (roughening of concrete surfaces) if possible
o Ensure sand and other aggregates are stored in bunded areas and are not allowed to dry out,
unless this is required for a particular process, in which case ensure that appropriate additional
control measures are in place
23
MEASURES SPECIFIC TO TRACKOUT
o Regularly use a water-assisted dust sweeper on the access and local roads, as necessary, to
remove any material tracked out of the site.
o Avoid dry sweeping of large areas.
o Ensure vehicles entering and leaving sites are securely covered to prevent escape of materials
during transport.
o Implement a wheel washing system (with rumble grids to dislodge accumulated dust and mud
prior to leaving the site where reasonably practicable).
8.4 Fencing and Hoarding
All work-sites will be completely fenced from public ingress. A range of allowable variations are as
follows:
•
The Minimum Case A post chain link/mesh fence, where appropriate for minimum security and
noise limitation needs.
•
The Standard Hoardings A 2.4m minimum height, plywood faced, timber framed boundary
hoarding, of a surface density of not less than 7kg/m2 for normal security and noise limitation
requirements. It may be necessary to increase the minimum height to protect buildings from
noise.
•
Special Circumstances Where a particular appearance or acoustic rating is needed.
The provisions of the Health and Safety at Work Act 1974 will be followed in all cases. Hoardings
erected causing poorly lit walkways will have bulkhead lights fitted.
Gates in the fencing or hoarding should, as far as is practicable be positioned and constructed to
minimise the noise transmitted to nearby noise sensitive buildings from the worksite or from plant
entering or leaving the site. Hoardings will be provided and maintained, by the Contractor, and the
Conditions of Licence issued by London Borough of Harringay. Adequate security will be exercised by
the Contractor to prevent unauthorised entry to or exit from the site. Site gates will be closed and locked
when there is no site activity and site security provisions will be set in motion. Provision of alarms will
follow HSE requirements
24
8.5 Painting the Hoardings
The Contractor will ensure that all hoardings are painted on both faces. This should normally be in a
plain uniform manner, but in some cases, where they will not distract drivers on the adjacent highway,
approved murals to a high standard may be encouraged.
8.6 Measures to minimise the impact of construction activities
Properties neighbouring the construction areas can be impacted by construction for short periods of
time.
Every effort is to be made to keep the impacts of construction to a minimum.
8.7 Measures Specific to Track out
For trackout, the distances should be measured from the side of the roads used by construction traffic.
Without site specific mitigation, trackout may occur from roads up to 500 m from large sites, 200 m from
medium sites and 50 m from small sites, as measured from the site exit. The impact declines with
distance from the site, and it is only necessary to consider trackout impacts up to 50 m from the edge of
the road.
It is important that haul routes and local access roads are kept free of dust as far as possible and are
swept regularly. Where possible, this should be water-assisted to increase damping down. However,
care should be taken to not to contaminate sewers or local waterways.
Wheel washing facility to be adopted as below
8.7.1 Wheel Washing
During the ground works operations vehicles exiting the site may carry deposits of clay or wet concrete,
trapped on their tyres, out on to the street. To prevent this occurring, a wheel cleaning regime will be
implemented.
All construction vehicles accessing and egressing the site will pass through our access on Rycroft way.
As noted on our Plan Appendix 1 an area has been set aside for wheel washing facilities. Where
necessary a mobile Jet wash will be employed to remove any mud from construction vehicles.
Periodically a road sweeper will be employed to clean both site access road and the surrounding road
25
network. Strict traffic management on site should minimise the risk of vehicles tracking debris from the
site
Wheel cleaning will consist of two simple operations carried out by designated operative, suitably attired
for this work.
1- Before leaving, the vehicle will stop and turn the engine off. If necessary any heavy deposits
will be removed manually using scrapers or the like.
2- Following step one, wheels will be washed using a high pressure jet wash lance ensuring that
any residual deposits lodged in the tyres are removed. If required the vehicle will move forward
slightly to ensure that the complete circumference of the wheel is clean.
On completion wheels will be inspected and confirmed that the vehicle is fit to leave site. The site
operatives will ensure that water used during wheel washing operations does not migrate out onto the
main highway.
8.7.2 Covering The Vehicles
All vehicles carrying dusty materials should be securely covered before leaving the site, to prevent dust
spilling on the road and being swept away by the wind.
8.7.3 Haul Routes
Unpaved haul routes can account for a significant proportion of fugitive dust emissions, especially in dry
or windy conditions, when the generation of dust through the movement of vehicles is exacerbated.
It is important that haul routes and local access roads are kept free of dust as far as possible and are
swept regularly. Where possible, this should be water-assisted to increase damping down. However,
care should be taken to not to contaminate sewers or local waterways
9.0 Local Suppliers
As part of our Corporate Social Responsibility Agenda, we aim to promote local employment and
stimulate the local economy. Where feasible we will source services, materials and equipment locally.
This improves local health by reducing freight impacts such as fossil fuel usage, congestion, pollution,
and road construction and road casualties.
26
10.0 Public Transport
Site meetings are arranged with a view to ensuring that attendees can use the public transport system
to arrive and disperse from the meetings. Details of the local bus and rail networks – identifying key
routes to the project will be posted on site notice boards and will be covered in the site induction to
promote the use of public transport. The main contractor`s site team is encouraged to become familiar
with the local transport systems and operating times and to pass this information onto all personnel on
site.
10.1 Avoiding Peak Hour Deliveries
As part of the procedure for the allocation of delivery times to suppliers, care will be taken to reduce the
amount of vehicle travelling time within peak periods. Where possible deliveries will be taken on site
early to allow the vehicles to be offloaded during the peak period and then leave site once the peak
period has ended. This allows greater efficiency in predicting delivery times and reduces haulage costs.
11.0Noise
As an employer we will assess the risks to employees from noise at work; take action to reduce the
noise exposure that produces those risks; provide employees with hearing protection if we cannot
reduce noise exposure enough by other methods; make sure legal limits on noise exposure are not
exceeded and provide employees with information, instruction and training and carry out health
surveillance where there is a risk to health.
The noise regulations require us to take specific action at certain action values. These relate to levels
of exposure to noise of our employees averaged over a working day or week and mmaximum noise
(peak sound pressure) to which employees are exposed in a working day.
The aim of the risk assessment is to help us decide what we need to do to ensure the health & safety of
our employees who are exposed to noise. It is more than just taking measurements of noise
(sometimes measurements may not even be necessary). The risk assessment will:
▪
Identify where there may be a risk from noise and who is likely to be affected
▪
Contain a reliable estimate of employees’ exposures and compare exposure with the exposure
action values and limit values
27
▪
Identify what we need to do to comply with the law (eg whether noise control measures or
hearing protection are needed and if so where and what type
▪
Identify who needs to be provided with health surveillance and whether any are at particular
risk
It is essential that we show that our estimate of employees’ exposure is representative of the work that
they do. It needs to take account of the work they do or are likely to do the ways in which they do the
work and how it might vary from one day to the next. The estimate will be based on reliable
information. We will record the findings of our risk assessment. We will record in an action plan
anything we identify as being necessary to comply with the law, setting out what we have done and
what we are going to do, with a timetable and saying who will be responsible for the work. Review our
risk assessment if circumstances onsite change and affect noise exposures. Also review it regularly to
make sure that we continue to do all that is reasonably practicable to control the noise risks. Even if it
appears that nothing has changed, we will not leave it for more than about two years without checking
whether a review is needed. We will make sure that our risk assessment has been drawn up by
someone who is competent to carry out the task and is based on advice and information from people
who are competent to provide it.
Our risk assessment will produce information on the risks and an action plan for controlling
noise:
▪
Tackle the immediate risk (eg by providing hearing protection)
▪
Identify what is possible to control noise, how much reduction could be achieved and what is
reasonably practicable
▪
Establish priorities for action and a timetable (eg consider where there could be immediate
benefits, what changes may need to be phased in over a longer period of time and the number
of people exposed to the noise in each case)
▪
Assign responsibilities to people to deliver the various parts of the plan
▪
Ensure the work on noise control is carried out
▪
Check that what we have done has worked
The purpose of the regulations is to make sure that people do not suffer damage to their hearing so
controlling noise risks and noise exposure should be where you concentrate our efforts. Wherever
there is noise at work we will be looking for alternative processes, equipment and/or working methods
28
which would make the work quieter or mean people are exposed for shorter times. We will also keep
up with what is good practice or the standard for noise control within the industry. Where there are
things you can do to reduce risks from noise, that are reasonably practicable, they should be done.
However, where noise exposures are below the lower exposure action values, risks are low and so we
are only expected to take actions which are relatively inexpensive and simple to carry out. Where our
assessment shows that our employees are likely to be exposed at or above the upper exposure action
values, we will put in place a planned programme of noise control.
We will consider the following:
▪
Use
a
different,
quieter
process
or
quieter
equipment
Modify the paths by which the noise travels through the air to the people exposed
▪
Design and lay out the workplace for low noise emission
▪
Limit the time spent in noisy areas (every halving of the time spent in a noisy area will reduce
noise exposure by 3 dB)
▪
Proper and regular maintenance of machinery and equipment is essential as it will deteriorate
with age and can become noisier
▪
Establish a low noise purchasing policy
Introducing a positive purchasing and hire policy is the most cost effective long term measure we can
take to reduce noise at work. Choosing quieter equipment and machinery whether it is bought or hired
from the start can save the cost of introducing noise reduction measures once it is installed or in use.
▪
Consider at an early stage how new or replacement machinery could reduce noise levels in the
workplace (set a target to reduce the noise levels if possible)
▪
Ensure we specify a realistic noise output level for all new machinery and check that tenderers
and suppliers are aware of their legal duties
▪
Ask suppliers about the likely noise levels under the particular conditions in which we will
operate the machinery as well as under standard test conditions
▪
If we ask the same question to all suppliers we can compare information (noise output data will
only ever be a guide as many factors affect the noise levels experienced by employees but it
will help us buy quieter machines)
▪
Try to purchase or hire only from suppliers who can demonstrate a low noise design with noise
control as a standard part of the machine, not as a costly optional extra
29
▪
Keep a record of our decision process, to help show that we have met our legal duties to
reduce workplace noise
Under the Health and Safety at Work etc Act 1974 and the Supply of Machinery (Safety) Regulations
1992 (as amended) a supplier of machinery must provide equipment that is safe and without risk to
health with the necessary information to ensure it will be used to meet those aims; design and construct
machinery so that the noise produced is as low as possible and povide information about the noise the
machine produces under actual working conditions. New machinery will be provided with a Declaration
of Conformity to show that it meets essential health and safety requirements and CE mark; instructions
for safe installation, use and maintenance and information on the risks from noise at workstations,
including:
A-weighted sound pressure level, where this exceeds 70 dB
Maximum C-weighted instantaneous sound pressure level, where this exceeds 130 dB
Sound power (a measure of the total sound energy) emitted by the machinery where the A-weighted
sound pressure level exceeds 85 dB
Description of the operating conditions under which the noise tests were carried out
Hearing protection will be issued to employees where extra protection is needed above what can been
achieved using noise control and as a short term measure while other methods of controlling noise are
being developed. We will not use hearing protection as an alternative to controlling noise by technical
and organisational means.
11.1 Requirements under the law:
▪
Provide employees with hearing protectors if they ask for them and their noise exposure is
between the lower and upper exposure action values
▪
Provide employees with hearing protectors and make sure they use them properly when their
noise exposure exceeds the upper exposure action values
▪
Identify hearing protection zones (ie areas where the use of hearing protection is compulsory
and mark them with signs if possible)
▪
Provide employees with training and information on how to use and care for the hearing
protectors
▪
Ensure that the hearing protectors are properly used and maintained
30
11.2 Using hearing protection effectively:
▪
Make sure the protectors give enough protection (aim at least to get below 85 dB at the ear)
▪
Target the use of protectors to the noisy tasks and jobs in a working days
▪
Select protectors which are suitable for the working environment (consider how comfortable
and hygienic they are)
▪
Think about how they will be worn with other protective equipment (eg hard hats, dust masks
and eye protection)
▪
Provide a range of protectors so that employees can choose ones which suit them
Don’t:
▪
Provide protectors which cut out too much noise as this can cause isolation or lead to an
unwillingness to wear them
▪
Make the use of hearing protectors compulsory where the law doesn’t require it
▪
Have a ‘blanket’ approach to hearing protection (better to target its use and only encourage
people to wear it when they need to)
We will make sure that hearing protection works effectively and check that:
▪
It remains in good, clean condition
▪
Earmuff seals are undamaged and tension of the headbands is not reduced
▪
There are no unofficial modifications
▪
Compressible earplugs are soft, pliable and clean
We will make sure that employees use hearing protection when required to:
▪
Include the need to wear hearing protection in your safety policy (put someone in authority in
overall charge of issuing it and making sure replacements are readily available
▪
Carry out spot checks to see that the rules are being followed and that hearing protection is
being used properly (if employees carry on not using it properly we will follow our normal
company disciplinary procedures)
▪
Ensure all managers and supervisors set a good example and wear hearing protection at all
times when in hearing protection zones
▪
Ensure only people who need to be there enter hearing protection zones and do not stay longer
than they need to
31
It is important that employees understand the risks they may be exposed to. Where they are exposed
above the lower exposure action values we should at least tell them:
▪
Likely noise exposure and the risk to hearing this noise creates
▪
What we are doing to control risks and exposures
▪
Where and how people can obtain hearing protection
▪
How to report defects in hearing protection and noise control equipment
▪
What their duties are under the Noise Regulations 2005
▪
What they should do to minimise the risk such as the proper way to use hearing protection and
other noise control equipment, how to look after it and store it, and where to use it
▪
Health surveillance systems
We will provide health surveillance (hearing checks) for all employees who are likely to be regularly
exposed above the upper exposure action values or are at risk for any reason (eg they already suffer
from hearing loss or are particularly sensitive to damage).
12.0 Vibration
By law, as an employer, we will assess and identify measures to eliminate or reduce risks from
exposure to hand-arm vibration so that we can protect our employees from risks to their health. Where
the risks are low, the actions we take may be simple and inexpensive, but where the risks are high, we
will manage them using a prioritised action plan to control exposure to hand-arm vibration. Where
required, ensure that control measures to reduce vibration are properly applied; we provide information,
training and health surveillance; review what you are doing if anything changes that may affect
exposures to vibration where you work and health effects of HAV at work.
Identifying signs and symptoms at an early stage is important. It will allow us, as the employer, to take
action to prevent the health effects from becoming serious for our employee. The symptoms include
any combination of tingling and numbness in the fingers; not being able to feel things properly; loss of
strength in the hands and fingers going white (blanching) and becoming red and painful on recovery
(particularly in the cold and wet and probably only in the tips at first).
In conducting a risk assessment, we will assess daily exposure to vibration by means of:
▪
Observation of specific working practices
32
▪
Reference to relevant information on the probable magnitude of the vibration corresponding to
the equipment used in the particular working conditions
▪
If necessary, measurement of the magnitude of vibration to which his employees are liable to
be exposed
▪
Employer shall assess whether any employees are likely to be exposed to vibration at or above
an exposure action value or above an exposure limit value
The risk assessment will include consideration of:
▪
Magnitude, type and duration of exposure, including any exposure to intermittent vibration or
repeated shocks
▪
Effects of exposure to vibration on employees whose health is at particular risk from such
exposure
▪
Any effects of vibration on the workplace and work equipment, including the proper handling of
controls, the reading of indicators, the stability of structures and the security of joints
▪
Any information provided by the manufacturers of work equipment
▪
Availability of replacement equipment designed to reduce exposure to vibration
▪
Any extension of exposure at the workplace to whole-body vibration beyond normal working
hours, including exposure in rest facilities supervised by the employer
▪
Specific working conditions such as low temperatures
▪
Appropriate information obtained from health surveillance including where possible published
information
13.0 Construction Lighting and Measures to Minimise Light Pollution
Lighting to site boundaries will be provided with illumination sufficient for the safety of the passing
public, including disabled people. Wherever possible, such lighting will be fed from an electricity mains
supply. In particular, precautions will be taken to avoid shadows cast by the site hoarding on
surrounding footpaths and roads. Site lighting will also be positioned and directed as so to minimise
nuisance to residents or adjacent buildings and land uses, or to cause distraction or confusion to
passing traffic on adjoining public highways. The contractor shall comply with the Institute of Lighting
Engineers document Guidance Notes for Reductions of Light Pollution 2000 (revised 05/03).Noise and
vibration
33
All works must be carried in accordance with BS 5228: Part 1 and employ the `Best Practicable Means`
to minimise the effects of noise and vibration.
Monitoring of noise and vibration levels may be
appropriate depending upon the proximity of sensitive receptors and the duration of work. Commitment to
consult with LBN Environmental Health regarding work.
14.0 Communication Strategy and Neighbour Liaison
Liaison with neighbours should take place before work gets underway and good communication must
continue throughout the works. Disruption to neighbours during a construction project may be
unavoidable, but the impact will be reduced if they are consulted and informed about problems and
potential solutions during each phase of the works. Often minor changes to working patterns, schedules
or methods can significantly improve the experience for neighbours; contractors are therefore strongly
encouraged to have a dialogue with affected residents throughout a project to determine what changes
can be accommodated.
It recommended that during liaison with immediate neighbours the following information, which may
influence schedules and work patterns for noisy/disruptive work, is obtained:
•
home working days and/or hours
•
details of any vulnerable persons in neighbouring properties who may have
•
special needs special occasions such as wakes, wedding receptions, children’s birthday
parties, etc
Site Category
Small (Cat 1)
Medium(cat 2)
Recommended communication measures and liaison strategy
• Contractor details, contact details for site manager, duration of project
and site working hours displayed clearly on site hoarding
• Person appointed to deal with complaints
• All staff and subcontractors briefed on noise mitigation and permitted
hours for noisy works
All Category 3 site measures and:
• Letter drops to neighbouring residents before work begins giving the
following information:
• the start date, duration and nature of the project
• the principal stages of the project
• all significant operations that have potential to cause disturbance from
noise and vibration
• approximate start and end dates of potentially disruptive works
• outline details of noise and vibration mitigation steps that are to be used
• contact names and numbers of appropriate site personnel
• Liaison with neighbouring construction sites to co-ordinate works are far
34
Large(Cat 3)
as practicable in order to minimise disruption to residents
All Category 2 and 3 site measures and:
Establish contact with the relevant residents‟ association
Meetings with residents at appropriate intervals including before work begins.
Minutes of meeting and agreed actions circulated to residents
website with site information and contact email address provided
14.1 Complaints Procedures
Freed Construction will clearly display contact details in prominent locations, at various points around the
site boundary.
Freed Construction will keep accurate records of any complaints received. We would propose that we will
advise the Haringay Environmental Protection Team of any complaints received and how we have
addressed them.
14.3 Environmental Code of Construction
The proposed work shall comply with council`s own code of construction practice and noise and vibration
limits. Contractor will minimise the adverse environmental impact of demolition and construction works at
the site
14.4 Documentation
The contractor may hold appropriate documentation that may include vibration and dust monitoring
results, complaint logs and action taken record.
14.5 Dealing with Complaints
The contractor is responsible for responding to complaints within an adequate time frame and where
appropriate providing details of corrective action taken. On Category 1 sites, there should be regular
meetings and correspondence between the contractor and the Council to monitor the progress of the
works, to consider any concerns or complaints and to review noise monitoring results, and, for large
projects/high-impact sites, meetings should be held with residents and neighbours to review these
results.
15.0 Review and Update
Periodic review of this code is necessary to ensure that it is sufficiently current and robust. The
Environmental Health Service will lead a review of the document on a five-year cycle. Where necessary
intervening updates will be produced to make minor changes where a review of the whole document is
deemed not to be necessary
35
Appendix A: Site Plan
36
Document Change Control
(This is a live document and will be updated as required during the life of the project)
Revision No
A
Date
20/06/2017
Description
Mayors Current SPG
Revised Pages
9
A
20/06/2017
Mitigation Measures
A
20/06/2017
Measures Specific to Track out
16
A
20/06/2017
Wheel Cleaning Facilities
17
B
26/06/2017
Dust Risk Assessment Part Updated
9,10 and 11
13-24
37
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement