Windmill, Porterstown, Clonsilla, Dublin 15 Construction...

Windmill, Porterstown, Clonsilla, Dublin 15

Construction Management Plan

3 October 2019

DOCUMENT CONTROL

2HQ PROJECT REF:

18-178

CLIENT NAME: Kimpton Vale Ltd

CLIENT REFERENCE: N/A

PROJECT NAME: Windmill, Porterstown, Clonsilla, Dublin 15

REPORT TITLE: Construction Management Plan

DOCUMENT STATUS: Private & Confidential

DOCUMENT FILE REF: 18-178-R.004

Issue No Author Date Approved by Date

1 Stephen McQuade 03/10/2019 Stephen McQuade 03/10/2019

Extent of Inspections

Where this Report is in connection with an inspection, note that we did not examine parts of the property/site/building which were covered, unexposed or inaccessible and we are therefore unable to report that any such part is free from defect. It should be assumed that no opening-up works, sampling, testing of materials, testing of drains or other underground services was carried out, except as explicitly stated within this Report. Any inspection was therefore of a superficial nature only.

Third Parties

This Report is for the sole use of the above named client. 2HQ Consulting Engineers Ltd accept no liability to any third party howsoever arising from the use of this Report.

Exclusions

This Report specifically excludes the following areas (unless explicitly noted otherwise herein):- Mechanical and Electrical Services, Architectural Matters (such as weathering, insulation, waterproofing, dpc, dpm etc.), Planning Issues, Fire Safety Issues, Asbestos, Health & Safety Issues, Property Valuations.

Construction Management Plan Windmill, Porterstown, Clonsilla, Dublin 15

18-178-R.004-Construction Management Plan

REPORT CONTENTS

1.0. INTRODUCTION

2.0. THE SITE AND SURROUNDING ENVIRONS

3.0. THE PROPOSED DEVELOPMENT

4.0. TYPICAL FORMS OF CONSTRUCTION

5.0. GENERAL SITE SET UP AND PRE-COMMENCEMENT MEASURES

6.0. CONSTRUCTION WASTE MANAGEMENT

7.0. PROPOSED REMOVAL / IMPORTATION OF MATERIALS

8.0. ENVIRONMENTAL MITIGATION MEASURES

9.0. DELIVERIES

10.0. CRANEAGE

11.0. PARKING AND STORAGE

12.0. DUST & DIRT CONTROL

13.0. NOISE CONTROL

14.0. VIBRATION

15.0. PROPOSED CONSTRUCTION PROGRAMME


18-178-R.004-Construction Management Plan 1

1.0. INTRODUCTION

1.1. This Construction Management Plan has been prepared on instructions from Kimpton Vale Ltd and

sets out arrangements and measures which may be undertaken during the construction phase of this

project in order to mitigate and minimise disruption / disturbance to the area around the site. The

purpose of the document is to demonstrate that due cognisance has been taken of factors arising from

the construction of the project and that these will be dealt with properly and with due consideration

for the surrounding environs.

1.2. This Construction Management Plan (CMP) represents the general intent for the execution of the

works. It should not be construed as representing the exact method or sequence in which all of the

construction works shall be carried out. Certain variations may be required from time to time to

facilitate site conditions and constraints arising at that time.

1.3. The following standards and guidance documents will be observed in preparation of the CPM:

• Best Practice Guidelines on the Preparation of Waste Management Plans for Construction and

Demolition (C&D) Projects.

• Department of Transport Traffic Signs Manual, Chapter 8 Temporary Traffic at Roadworks

October 2010,

• Guidance for the Control and Management of Traffic at Roadworks 2007,

• Safety Health and Welfare (Construction) Regulations 2013

• Safety Health and Welfare at Work (General Application) Regulations 2007.

The CMP will serve as guidance tool for the construction activities associated with the construction of

the proposed development. It is intended that the objectives of the CMP will be implemented by the

developer and by the main contractor on site. As such, the CMP provides objectives to be met during

the construction process, while procedures will be left with the Developer and contractors under his

guidance.

The CMP will encompass the various aspects of construction associated with construction activities,

staff parking, materials delivery and access requirements within a residential road network that has

been operational for some time. Demolition and Construction Waste are also addressed. The

operational phase of the development, once construction has ceased and residents have occupied the

site, is not addressed in this CMP.

This management plan does not replace or form part of the Preliminary Health and Safety Plan which

is required to be prepared under the Health and Welfare at Work (Construction) Regulations 2013.

The construction works are to be carried out to ensure that best practices and all legal obligations

including Local Authority requirements and Health and Safety legislation are complied with.



2.0. THE SITE AND SURROUNDING ENVIRONS

2.1. The site is located within the unfinished residential development known as Windmill at Porterstown,

Clonsilla, Dublin 15. The site is bound to the south by the Royal Canal, to the north by St. Mochta’s

Estate, to the east by Stationcourt Park residential development and to the west by Diswellstown

Road.

2.2. The site which is subject to development lies adjacent to 5no. completed and occupied apartment

blocks and 6no. completed and occupied duplex blocks. A partly completed basement is located

beneath some of the existing apartments and will also be located under part of the proposed

development.

2.3. The site is bound by the Clonsilla Road to the north, the Diswellstown Road to the west, the Royal

Canal and Dublin - Maynooth Rail to the south and Stationcourt Way to the east. The area includes

3no. large residential developments - St Mochta’s, Stationcourt and Windmill Square, with an overall

total of approximately 500no. existing residential units within the area. The subject site remains the

only undeveloped portion of these lands. The location of the site relative to the larger area is shown

on Figure 2.1.

Figure 2.1 – Site location / Context map

Vehicular Access to / from the development shall be via Windmill Court and Stationcourt Way along

the east side of the site. No new road sections are required external to the site. Stationcourt Way

links onto the Clonsilla Road in the north east corner of the site and forms a 4-leg traffic-controlled

junction with Clonsilla Road and the Coolmine Industrial Estate Road. A view of this junction is shown

on Figure 2.1.



3.0. THE PROPOSED DEVELOPMENT

3.1. Permission has previously been granted for the subject site under planning register reference

FW15A/0145 in April 2016 for 143no. apartments in 4no. apartment blocks consisting of 2no. 1-bed,

132no. 2-bed and 9no. 3-bed residential units. Block J was to be a six storey block, including a

penthouse level, containing 39no. apartments, Block K was to be a 6 storey block, including a

penthouse level, containing 34no. apartments and block L and M was to be an interlinked L-shaped

part four part five storey block, including a penthouse level, with block L containing 46no. apartments

and block M containing 24no. apartments.

3.2. The applicant now wishes to apply for planning permission to construct 211 no. apartments in four no.

blocks (Block J, K, L and M), comprising of 10 no. studio units, 67 no. 1 bed units and 134 no. 2 bed

units, above an existing basement. Block J is a six storey block, including a penthouse level, containing

46 no. apartments. Block K is a six storey block, including a penthouse level, containing 46 no.

apartments. Block L and M is an interlinked L-Shaped part six and part eight storey block, including a

penthouse level, containing 119 no. apartments. A communal amenity space is proposed at ground

floor level of Block L-M. The scheme includes public and communal open space, car and cycle parking,

bin storage and all associated development on an application site area of c. 3.73 hectares.

4.0. TYPICAL FORMS OF CONSTRUCTION

4.1. The form of construction for the buildings will generally be as follows;

• In-situ concrete basement carpark (existing)

• Reinforced concrete strip footings

• Load bearing walls in blockworks, in-situ concrete and/or precast concrete.

• Precast concrete floors with structural screed topping.

• Precast concrete stairs and landings.

• Lightweight roof structure to penthouses.

• Vertical, peripheral and internal ties in reinforced concrete (for disproportionate collapse).

5.0. GENERAL SITE SET UP AND PRE-COMMENCEMENT MEASURES

5.1. Detailed condition surveys (including photographs) may be carried out on certain adjacent / adjoining

third party buildings prior to any work being carried out on the site. The purpose of the survey would

be to record the condition of the properties both externally before the works commence. Copies of

these survey Reports would be provided to the third party owners as appropriate.

Any significant cracks which are found may be fitted with “tell-tale” monitors at the discretion of the

contractor. These would be monitored at regular intervals during the construction works.



5.2. A detailed condition survey (including photographs) may be carried out on the streets and footpaths

surrounding the site. The purpose of the survey would be to record the condition of the streets and

footpaths around the site prior to the works commencing.

5.3. A site compound including offices and welfare facilities will be set up by the contractor in locations to

be decided within the site.

5.4. Prior to any site works commencing, the contractor will investigate / identify the exact location of and

tag all existing services and utilities around and through the site with the assistance of the relevant

Fingal County Council technical divisions and utility companies.

5.5. Vibration monitoring stations may also be set up at strategic locations around the perimeter of the

site in order to monitor background levels of vibration and also to monitor vibration levels emanating

from the construction works. All necessary measures will be taken to ensure vibration levels are kept

to a minimum and to below recognised threshold levels stipulated in the relevant codes of practice

and good practice guides.

5.7 Typical working hours for the site would be 7.00am to 6.00pm Monday to Friday and 8.00am to

2.00pm Saturday. No Sunday work or works on Public Holidays will generally be permitted. The above

working hours are in accordance with the Planning Permission and will not be varied without prior

agreement with the Local Authority.

5.8 Hoarding lines will be set up as agreed with Fingal County Council Roads Division and Building Control.

In this regard, the contractor shall apply for and obtain the necessary hoarding licences. The hoarding

will typically comprise of painted plywood and will typically be 2.4m minimum in height. During certain

phases of the construction works this hoarding may need to be replaced with demountable mesh

fencing, in order to facilitate the works.

5.9 The hoarding arrangement may change during the course of the works depending on phasing and

particular construction operations underway at any given time. The contractor will apply for and

obtain all necessary licences to cover any changes to the hoarding layout.

5.10 Access gates may be operated by a flagman who will divert incoming / outgoing vehicles / pedestrians

and general traffic as necessary.

5.11 The proposed location of the site compound is indicated below.



Figure 5.1 - Proposed location of site compound outlined in green

6.0. CONSTRUCTION WASTE MANAGEMENT

7.1. This assessment has been undertaken in accordance with the Department of the Environment,

Heritage and Local Government document entitled “Guidelines on the Preparation of Waste

Management Plans for Construction and Demolition projects, July 2006”. The document has also been

prepared in accordance with the requirements of the Waste Management Acts 1996 to 2005 and all

associated Regulations.

7.2. Construction and demolition waste is defined as waste which arises from construction, renovation and

demolition activities together with all waste categories mentioned in Chapter 17 of the European

Waste Catalogue (EWC). Also included within the definition are surplus and damaged products and

materials arising in the course of construction work or used temporarily during the course of on-site

activities.

7.3. Typical construction waste which will be generated by the development building rubble including

masonry, concrete, steel and timber arising out of the demolition of certain existing buildings on the

site. W here reasonably practicable, this material will be separated into concrete / masonry, steel and

timber stockpiles, for recycling.

7.4. Any asbestos will be dismantled, handled and disposed of in accordance with the relevant health &

safety legislation, by a specialist qualified sub-contractor, before the main demolition works

commence.

Site compound outlined in green



7.5. Proposal for the minimisation, reuse and recycling of waste will include the following:

• For the duration of the demolition enabling works, it is envisaged that all waste will primarily arise

as a result of the demolition of the existing building.

• All demolished material will be segregated into different skips for recycling.

• Timber, Steel, Plasterboard, Plastic will be segregated on site and removed by skips. Concrete,

Blocks, Bricks and stone will be segregated on site and crushed and used on site where

appropriate.

• Residue waste will be removed from site by an authorised waste collection company to transfer

station for final segregation.

• Concrete waste, wood and packaging waste will be stored in receptacles with mixed C&D waste

materials, for subsequent separation and recovery at a remote facility.

• Hazardous wastes will be identified, removed and kept separate from other C&D waste materials

in order to avoid further contamination.

• An authorised waste collection company will be utilized for the collection and movement of waste

off-site. The waste arising will be brought to a licensed/permitted facility for recycling/recovery

as appropriate.

7.6. The appointed contractor will be designated as the Construction & Demolition (C&D) Waste Manager

and will have overall responsibility for the development and implementation of the Construction Stage

Waste Management Plan. The C&D Waste Manager will be assigned the authority to instruct all site

personnel to comply with the specific provisions of the Plan.

7.7. Copies of the Project C&D Waste Management Plan will be made available to all relevant personnel

on site. All site personnel and sub-contractors will be instructed about the objectives of the Project

C&D Waste Management Plan and informed of the responsibilities which fall upon them as a

consequence of its provisions. Where source segregation and material reuse techniques apply, each

member of staff will be given instructions on how to comply with the Project C & D Waste

Management Plan. Posters will be designed to reinforce the key messages within the Project C&D

Waste Management Plan and will be displayed prominently for the benefit of site staff.

7.8. The C&D Waste Manager shall arrange for full details of all waste arising, movements and treatment

of construction and demolition waste discards to be recorded during the construction stage of the

Project. Each consignment of C&D waste taken from the site will be subject to documentation, which

will conform with the information outlined in Table 6.1 below and will ensure full traceability of the

material to its final destination.



Name of Project of Origin

Material Being Transported

Quantity of Material

Date of Material Movement

Name of Carrier

Destination of Material

Proposed Use

Table 6.1 – Details to be Included within Transportation Dockets

Details of the inputs of materials to the construction site and the outputs of wastage arising from the Project will be investigated and recorded in a Waste Audit, which will identify the amount, nature and composition of the waste generated on the site.

The Waste Audit will examine the manner in which the waste is produced and will provide a commentary highlighting how management policies and practices may inherently contribute to the production of construction and demolition waste. The measured waste quantities will be used to quantify the costs of management and disposal in a Waste Audit Report, which will also record lessons learned from these experiences which can be applied to future projects.

The total cost of C&D waste management will be measured and will take account of the purchase cost of materials (including imported soil), handling costs, storage costs, transportation costs, revenue from sales, disposal costs etc. For in-house records, costs will be calculated for the management of a range of C&D waste materials, using the format shown in Table 6.2 below.

Material Type if C&D Waste material e.g. soil

Estimated Quantities & Costs (tonnes & Euro)

Quantity of Waste Soil (tonnes)

Purchase Cost ie Import Costs (€)

Materials Handling Costs (€)

Material Storage Costs (€)

Material Transportation Costs (€)

Revenue from Material Sales (€)

Material Disposal Costs (€)

Material Treatment Costs (€)

Total Waste Soil Management Costs (€)

Unit Waste Soil Management Costs (€)

Table 6.2 – Example of a Record Form for Costs of C&D Waste Management

A summary report outlining the types, quantity and final treatment of C&D Waste arising from the Project will be forwarded to Fingal County Council on completion of the Project.



7.0. PROPOSED REMOVAL / IMPORTATION OF MATERIALS

7.1. A geotechnical investigation of the site has been undertaken for the purposes of establishing sub-soil

conditions. please refer to the geotechnical report prepared by Ground Investigations Ireland in

Appendix A.

7.2. The investigation comprised the excavation of 9 pits across the site for the purposes of establishing

the general sub-soil characteristics, percolation properties (for drainage design) and the bearing

strength (for foundation design). Environmental testing, including Waste Acceptance Criteria (RILTA)

was carried by Jones Environmental laboratory in the UK. The results of the laboratory testing are

including in Appendix 4 of the GII report.

7.3. In general, the ground conditions encountered across the site comprised:

• Made ground

• Natural granular deposits

• Natural cohesive deposits

• Weathered bedrock

The Made Ground, it is described in the Ground Investigations Ireland report as “brown sandy slightly

gravelly CLAY with frequent cobbles and boulders and contained rare to occasional cloth, metal, rope

and plastic.”. The Made Ground is substantially brown sandy slightly gravelly CLAY with frequent

cobbles and boulders.

The laboratory testing did not show any indication of contamination on the site.

7.4. There is an amount of topsoil, arisings from earlier works and small amounts of builder’s waste

material currently on site which will require removal during the construction process. Further arisings

and waste material will be generated as a result of the proposed works and will be managed in

accordance with the CMP as outlined above. Similarly, any importing of fill or topsoil that would be

required for the proposed development will be managed in accordance with the CMP as modified by

the Planning and Environmental Department’s requirements.

8.0. ENVIRONMENTAL MITIGATION MEASURES

8.1. General

Prior to any works, all personnel involved will receive an on-site induction relating to operations within

and adjacent to watercourses and the environmentally sensitive nature of the proximity of the

European sites and re-emphasise the precautions that are required as well as the construction

management measures to be implemented.



The project proponent will ensure that the engineer setting out the works is fully aware of the

ecological constraints and construction management requirements.

Any incident or observation of anything that may be considered as causing or likely to cause

disturbance or damage to European Sites will be reported to the Local Authority immediately. The

Local Authority will take immediate action to prevent or limit the impact and will notify the project

proponent contact of the incident and the actions taken.

8.2. Pollution of Watercourses

The Contractor will prevent any silting/erosion of water courses and pollution of the water that may

adversely affect the quality or appearance of the water or cause obstruction or interference with the

flow.

The works area will be fenced with Terram or equivalent geo-textile fencing, secured to the ground to

prevent the wash-out of suspended solids from the site to adjacent watercourse. Where possible, this

will be set back from the riparian corridor of the watercourse to allow the retention of a buffer-zone

of riparian vegetation along the drainage channels.

The Contractor will establish site boundary markings to safeguard features of interest/value.

Tools and equipment are not to be cleaned in watercourses.

Chemicals used will be stored in sealed containers.

Chemicals shall be applied in such a way as to avoid any spillage or leakage.

Any and all excavated material is NOT to be temporarily stored adjacent to watercourses.

8.3. Fuel/Lubricant Spillage from Equipment

All refuelling, oiling and greasing will take place above drip trays or on an impermeable surface which

provides protection to underground strata and watercourses and away from drains and watercourses

as far as reasonably practicable. Vehicles will not be left unattended during refuelling.

Storage areas, machinery depots and site offices will be located at least 10m from any watercourse.

Spill kits will be made available close to streams and all staff will be properly trained on correct use.

All fuels, lubricants and hydraulic fluids required to be stored on site will be kept in secure bunded

areas at a minimum of 10m from all watercourses. The bunded area will accommodate 110% of the

total capacity of the containers within it.



Containers will be properly secured to prevent unauthorised access and misuse. An effective spillage

procedure will be put in place with all staff properly briefed. Any waste oils or hydraulic fluids will be

collected, stored in appropriate containers and disposed of offsite in an appropriate manner.

All plant shall be well maintained with any fuel or oil drips attended to on an ongoing basis.

Any minor spillage during this process will be cleaned up immediately.

Should any incident occur, the situation will be dealt with and coordinated by the nearest supervisor

who will be responsible for instructions by the Local Authority.

8.4. Concrete

Wet concrete and cement are very alkaline and corrosive and can cause serious pollution to

watercourses.

Disposal of raw or uncured waste concrete will be controlled to ensure that watercourses will not be

impacted.

Best practice in bulk-liquid concrete management addressing pouring and handling, secure shuttering

/ form-work, adequate curing times.

Wash water from cleaning ready mix concrete lorries and mixers may be contaminated with cement

and is therefore highly alkaline. Due to the size of the site and the proximity of sensitive watercourses,

it is recommended that lorries and mixers are washed out of off-site.

8.5. All surface water drainage networks will be designed in accordance with the Greater Dublin Strategic

Drainage Study and the requirements of Fingal County Council. SuDS will provide a comprehensive

design approach to the management of water on site, to delay run-off and encourage filtration

through the use of porous surfaces, rainwater harvesting etc. in ways which enhance amenity and

biodiversity and minimise pollution effects. Therefore, the use of SuDS will provide benefits in what is

described as the SuDS principles; water quality, water quantity and amenity/biodiversity.

8.6. The development design includes a green area abutting the western treeline which will negate any

potential indirect impact on foraging bats in terms of light pollution.

8.7. Emergency Numbers

Ambulance 112 / 999

Fire Brigade 112 / 999

Blanchardstown Fire Station 01 222 4000

Garda Station 112/999

HSA 01-6147000

ESB 1850-372999 (if cable is struck)

Bord Gais 1850-205050 (if gas main/service is struck)



Eircom 1901

9.0. DELIVERIES

9.1. Deliveries to the construction site will be made to the main access / egress point into the site.

9.2. Any large prefabricated elements which require craneage from the roadside will be delivered off peak

hours and any necessary street or lane closures will be co-ordinated by the contractor with An Garda

Siochana and Fingal County Council Roads Division. A detailed traffic management plan will be

submitted with any such application, as is normal procedure.

9.3. Large concrete pours may be organised such that concrete trucks will queue at a pre-determined

staging point (such that they do not cause an obstruction to general traffic in the area) and will then

be called in by radio as appropriate to the site, if queuing inside the site boundary is not possible.

Exact concrete pouring procedures will be approved in advance of the works.

Designated wash-out areas shall be provided, or alternatively vehicle wash-out shall be prohibited on

site, if required.

9.4. All delivery vehicles will be co-ordinated by the flagman on duty at the access gate.

9.5. It is proposed that a directive shall be issued to suppliers to ensure that deliveries shall arrive, insofar

as is practicable, at times to avoid heavy traffic congestion associated with the adjacent school

activities.

10.0. CRANEAGE

10.1. Typical types of crane which may be used in the construction of the works are mobile cranes and

teleporters.

10.2. Tower cranes will also be utilised during the construction.

10.3. The contractor will be responsible for any temporary works or foundations necessary for craneage.

11.0. PARKING AND STORAGE

11.1. It is intended that construction operatives will use the existing underground car park.

11.2. The contractor will be required to monitor this situation throughout the duration of the construction

phase. The contractor will be required insofar as is reasonably practicable to monitor the parking of



their sub-contractors and to put measures in place, if necessary, to ensure vehicles belonging to their

sub-contractors are not illegally parked or causing an obstruction to the public.

11.3. Typical compound locations will be used within the site confines for storage of materials.

11.4. Therefore, the contractor will be required to schedule delivery of materials strictly on a daily basis.

12.0. DUST & DIRT CONTROL

12.1. Nuisance dust emissions from construction activities are a common and well recognised problem. Fine

particles from these sources are recognised as a potential significant cause of pollution.

The contractor will be required to demonstrate that both nuisance dust and fine particle emissions

from the site is adequately controlled and are within acceptable limits.

12.2. Some of the potential effects of particles on people and the environment around a site are as follows:-

• Health effects from particles of dust getting into eyes and mouth, falling onto skin, hair and lips

and smaller particles getting into the respiratory tract.

• Loss of visual amenity through deposition.

• Increased atmospheric particle concentrations.

• Surface soiling on existing finishes and possible damage with associated cleaning.

• Mechanical and / or electrical faults to equipment.

• Increased abrasion of moving parts.

• Clogging of filters.

• Soiling of cars, windows, washed clothes etc.

12.3. Dust and fine particle generation from construction and demolition activities on the site can be

substantially reduced through carefully selected mitigation techniques and effective management.

Once particles are airborne it is very difficult to prevent them from dispersing into the surrounding

area. The most effective technique is to control dust at source and prevent it from becoming air borne,

since suppression is virtually impossible once it has become air borne.

12.4. The following are techniques and methods which are widely used currently throughout the

construction industry and which may be used in the Windmill Development.



• The road fronting the site are all surfaced and no dust is anticipated arising from unsealed

surfaces.

• A regime of ‘wet’ road sweeping can be set up to ensure the road fronting the site is as clean and

free from dirt / dust arising from the site, as is reasonably practicable. This cleaning will be carried

out by approved mechanical sweepers.

• Footpaths immediately fronting the site can be cleaned by hand regularly, with damping as

necessary.

• High level walkways and surfaces such as scaffolding can be cleaned regularly using safe ‘wet’

methods, as opposed to dry methods.

• Vehicle waiting areas or hard standings can be regularly inspected and kept clean by brushing or

vacuum sweeping and will be regularly sprayed to keep moist, if necessary.

• Vehicle and wheel washing facilities can be provided at site exit(s) where practicable. If necessary,

vehicles can be washed down before exiting the site.

• Netting, if necessary, can be provided to enclose scaffolding in order to mitigate escape of air

borne dust from new buildings.

• Vehicles and equipment shall not emit black smoke from exhaust system, except during ignition

at start up.

• Engines and exhaust systems should be maintained so that exhaust emissions do not breach

stationary emission limits set for the vehicle / equipment type and mode of operation.

• Servicing of vehicles and plant should be carried out regularly, rather than just following

breakdowns.

• Internal combustion plant should not be left running unnecessarily.

• Exhaust direction and heights should be such as not to disturb dust on the ground and to ensure

adequate local dispersal of emissions.

• Where possible fixed plant such as generators should be located away from residential areas.

• The number of handling operations for materials will be kept to a minimum in order to ensure that

dusty material is not moved or handled unnecessarily.

• The transport of dusty materials and aggregates should be carried out using covered / sheeted

lorries.

• Material handling areas should be clean, tidy and free from dust.



• Vehicle loading should be dampened down and drop heights for material to be kept to a minimum.

• Drop heights for chutes / skips should be kept to a minimum.

• Dust dispersal over the site boundary should be minimised using static sprinklers or other watering

methods as necessary.

• Stockpiles of materials should be kept to a minimum and if necessary, they should be kept away

from sensitive receptors such as residential areas etc.

• Stockpiles were necessary, should be sheeted or watered down.

• Methods and equipment should be in place for immediate clean-up of spillages of dusty material.

• No burning of materials should be allowed on site.

• Earthworks excavations should be kept damp where necessary and where reasonably practicable.

• Blasting shall not be used during the demolition process.

• Screening and sheeting of buildings being demolished should be considered.

• Biological materials such as bird droppings should be removed insofar as is practicably possible

prior to the main demolition.

• Any Asbestos shall be removed in full by specialist subcontractor, prior to demolition.

• Water sprays should be affixed to mechanical excavators involved in demolition works.

• Demolition waste should be removed from site as quickly as possible to minimise risk of dust

generation.

• Cutting on site should be avoided where possible by using pre-fabrication methods.

• Equipment and techniques for cutting / grinding / drilling / sawing / sanding etc, which minimise

dust emissions and which have the best available dust suppression measures, should be

employed.

• Water sprays should be used where possible during cutting.

• Fans and filters to dust suppressions systems should be serviced and maintained regularly to

ensure correct operation.

• Mortar raking kits fitted to small hand held grinders should be used where raking out brickwork

for re-pointing.



• Where scabbling is to be employed, tools should be fitted with dust bags, residual dust should be

vacuumed up rather than swept away, and areas to be scrabbled should be screened off.

• Wet processes should be used to clean building facades if possible. If dry grit blasting is

unavoidable then ensure areas of work are sealed off and dust extraction systems used.

• Where possible pre-mixed plasters and masonry compounds should be used to minimise dust

arising from onsite mixing.

12.5. Prior to commencement, the contractor should identify the construction operations which are likely

to generate dust and to draw up action plans to minimise emissions, utilising the methods highlighted

above. Furthermore, the contractor should prepare environmental risk assessments for all dust

generating processes, which are envisaged.

12.6. The contractor should allocate suitably qualified personnel to be responsible for ensuring the

generation of dust is minimised and effectively controlled.

12.7. The contractor should appoint 1 No. person to the site as the liaison with third parties in respect of

complaints regarding dust.

12.8. If necessary, the contractor should take specialist advise in relation to the monitoring strategies to be

implemented on the site.

12.9. All surface water runoff from wash-down actions is to be diverted to the tailings pond prior to

discharge to a discharge location to be agreed with Fingal County Council.

13.0. NOISE CONTROL

13.1. Construction and demolition works can pose different problems in respect of noise control, compared

with most other types of industrial activity for the following reasons:-

• They are mainly carried out in the open.

• They are of temporary duration although they can cause disturbance while they last.

• The noise arises from many different activities and types of plant and machinery. The intensity

and characteristics of the noise generated can vary greatly at different stages of the work.

13.2. Noise is usually defined as unwanted sound, however strictly noise and sound are the same. Noise

can,

• Be a nuisance, resulting in disturbance and loss of enjoyment of life, loss of sleep and fatigue.



• Distract attention and concentration, mask audible warning signals or interfere with work thereby

being a factor in work place accidents.

• Result in hearing impediment.

13.3. The contractor will deal with the immediate dangers to hearing etc. associated with high noise levels

and the impact of same on construction operatives, by means of risk assessment and mitigation /

precautionary measures and equipment, all pursuant to the current health and safety legislation.

13.4. The contractor should carry out a noise assessment in relation to the proposed works at construction

stage. This noise assessment should be carried out by a competent person (or specialist firm) with

specialist training in this area.

13.5. The noise assessment should include the following steps,

a) Identify and list all construction work activities where there is likely to be a significant noise

hazard.

• Demolition

• Excavation

• Piling

• Hauling away from site

• Delivery to site

• Cutting / grinding

• Dumping

• Temporary power generating

• Craneage.

b) Determine the hazards / nuisance. Excessive noise arising from,

• Cartridge tools

• Pneumatic breakers

• Drills and diggers

• Chainsaws / road saws

• Compactors

• Compressed air tools

• Woodworking machines

• Compressors and generators

• Welding and burning equipment

• Hammers

• Piling rigs

• Mobile plant (dumpers / cranes / forks etc).

c) Identify all third parties likely to be exposed to the nuisance.



• All employees

• Other employer’s personnel

• Visitors to site

• Members of the public living, working or passing by the site.

d) Measuring the risk: The level of noise in dBA. Consideration should be given to the following;

• How to measure the noise (sound level meters / dose meters).

• Where to measure the noise (i.e. in nearby houses, in offices, in workplaces, in rear gardens, in

bedrooms).

• How long to measure the noise (i.e. the period must be representative of the construction

operations taking place over a given period).

e) Considering and Implementing Control Measures. Consideration should be given to the following:

• What precautionary measures are already in place? Are these adequate to maintain noise levels

below regulation limits? If yes, does action need to be taken to ensure these measures are

properly maintained?

• If the existing precautionary measures are inadequate, then measures should be taken to

eliminate noise - Examples of reduction of noise at source are as follows:

o Purchase / hire low noise machinery.

o Change the type of machinery proposed.

• Reduce noise - Examples of elimination of noise are as follows,

o Use pre-finished / prefabricated materials rather than cutting/ grinding / polishing

etc.

o Use bored piles instead of driven piles.

o Use hydraulic crushing jaws to break concrete rather than mechanical breakers.

o Use pre-drilled holes instead of on site drilling.

o Tighten loose and rattling machinery.

• Control exposure to noise - Examples of control of exposure are as follows,

o Provide temporary sound attenuation enclosures to specific noisy work areas.

o Place noisy plant away from sensitive receptors such as residential areas.

o Provide isolators to machinery.

o Provide silencers to machinery.

o Maintain existing machinery.

f) Record the findings of the noise assessment. The noise control methods may become ineffective

as the project progresses, the type of work operation changes and the site evolves. Therefore,

the contractor should continually review and monitor the noise situation throughout the life of

the project and, if necessary, adjust / add to the noise control measures put in place. The

contractor should appoint 1 No. dedicated person who will be the point of contact for noise



control / monitoring on the site and who will be available to take complaints from third parties if

necessary.

14.0. VIBRATION

14.1. Vibration Control Targets

General

When setting targets for maximum vibration levels reference should be made to the existing ambient

vibration levels, which should be measured prior to commencement of construction works. This is

particularly applicable on sites adjacent to roads carrying heavy commercial traffic. It is not

uncommon for vibrations from such sources to mask vibrations from construction works.

Vibration Levels

The intensity of each vibration disturbance registered at the remote receiving point will normally be a

function of many variables including:

a) Energy per blow or cycle.

b) Distance between source and receiver.

c) Ground conditions at the site, e.g. soft or hard bearing strata and the location of water table.

d) Soil-structure interaction, i.e., nature of connection between soil and structure being

monitored

e) Construction of structure and location of measuring points, e.g. Soil surface.

f) Building foundation.

g) Internal structural element.

Various empirical formulae have been proposed relating the intensity of vibration measured at the

remote receiving point, to the distance between it and the source and the energy of the source. The

use of such formulae enables a rough estimate to be made as a check on the acceptability of the

proposed process from a vibration standpoint, prior to the commencement of the piling works.

14.2. Factors when setting vibration control targets

Human response to vibration

Human beings are known to be very sensitive to vibration, the threshold of perception being typically

in the peak particle velocity range of 0.15 mm/s to 0.3 mm/s, at frequencies between 8 Hz and 80 Hz.

Vibrations above these values can disturb, startle, cause annoyance or interfere with work activities.

At higher levels they can be described as unpleasant. In residential accommodation vibrations can

promote anxiety lest some structural mishap might occur. Guidance on the effects on physical health

of vibration at sustained high levels is given in BS 6841, although such levels are highly unlikely to be

encountered as a result of construction works. BS 6472 sets down vibration levels at which minimal

adverse comment will be provoked from the occupants of the premises being subjected to vibration.



It is not concerned primarily with short term health hazards or working efficiency. It points out that

human response to vibration varies quantitatively according to the direction in which it is perceived.

Thus, generally, vibrations in the foot-to-head mode are more perceptible than those in the back-to-

chest or side-to-side modes although at very low frequencies this tendency is reversed. Base curves in

terms of both vibratory acceleration and peak particle velocity in the different coordinate directions

are shown in BS 6472. These curves apply to continuous vibrations and there is a series of multiplying

factors which can be applied according to the sensitivity of the location to vibrations. In addition,

formulae are quoted which may be used to establish minimal adverse complaint levels where the

vibrations are intermittent but overall of relatively short duration in comparison to the daytime or

night-time period.

A kindred problem is that vibrations may cause structure-borne noise which can be an additional

irritant to occupants of buildings. Loose fittings are prone to rattle and movement.

Structural Response to Vibration

Structural failure of sound buildings or building elements or components is not a phenomenon

generally attributed to vibration from well controlled construction operations. Extensive studies

carried out have shown that documented proof of actual damage to structures or their finishes

resulting solely from construction vibrations is rare. There are many other mechanisms which cause

damage especially in decorative finishes and it is often incorrectly concluded that construction

vibrations should be blamed. Among the points to bear in mind are the following:

• The design of the structure.

• The nature, condition and adequacy of the foundations and the properties of the ground

supporting these.

• The age of the structure.

• The method and quality of construction, including finishes;

• the general condition of the structure and its finishes;

• a schedule of existing defects, especially cracks, supplemented where necessary by a photographic

record.

• Any information pertaining to major alterations, such as extensions, or past repair work.

• The location and level of the structure relative to the construction works.

• The natural frequencies of structural elements and components.

• The duration of construction operations.



Response Limits to Structure

It is recommended that, for soundly constructed residential property and similar structures which are

in generally good repair, a conservative threshold for minor or cosmetic (i.e. non-structural) damage

should be taken as a peak particle velocity (p.p.v.) of 10 mm/s for intermittent vibration and 5 mm/s

for continuous vibrations. Below these vibration magnitudes, minor damage is unlikely to occur.

Where buildings appear not to conform precisely to one or other of the descriptions given in this sub

clause, the thresholds may be adjusted within those stated.

The vibration levels given in this sub clause refer to the maximum value on a load bearing part of the

structure at ground or foundation level in the vertical, radial or tangential direction.

Amplification factors will vary according to individual circumstances, but factors of between 1.5 and

2.5 are typical.

Current experience suggests that these values may be reduced by up to 50 % where the preliminary

survey reveals existing significant defects (such as a result of settlement) of a structural nature, the

amount of the reduction being judged on the severity of such defects. The range of frequencies excited

by construction operations in the soil conditions typical in this country is between 10 Hz and 50 Hz.

Acceptable values of p.p.v. may need adjustment for predominant frequencies outside this range.

Buildings constructed for industrial and commercial use exhibit greater resistance to damage from

vibrations than normal dwellings, and it is recommended that light and flexible structures (typically

comprising a relatively light structural frame with infill panels and sheet cladding) should be assigned

thresholds of 20 mm/s for intermittent vibrations and 10 mm/s for continuous vibrations, whereas

heavy and stiff buildings should have higher thresholds of 30 mm/s for intermittent vibrations and 15

mm/s for continuous vibrations.

In certain circumstances it may be necessary in addition to specify limits at other locations. For

example, modern multi-storey buildings employing continuous construction methods exhibit little

inherent damping. Significant amplification of incoming vibrations can, therefore, occur at the upper

storeys, notably in the horizontal modes. Likewise, amplification of vibrations (mostly vertical) can

occur in the middle of suspended floors. A vertical p.p.v. of up to 20 mm/s during driven piling may be

tolerated at such positions. However special care may be needed for old plaster and lath ceilings

beneath suspended floors.

14.3. Practical methods to reduce Vibration

Use of alternative methods

As with noise control methods it should be borne in mind that piling and ground engineering processes

are primarily selected on the basis of the strata to be encountered, the loads to be supported and the

economics of the system. After consideration of these constraints, however, it should be possible to

select the process least likely to give rise to unacceptable vibrations in particular circumstances.



Examples would include the use of continuous flight auger injected piles, jacked preformed piles,

auger bored piles, or possibly impact bored piles in preference to driven piles.

Removal of obstructions

Obstructions constitute a hindrance to progress and exacerbate the transmission of environmental

vibrations, especially where they occur at shallow depths. Obstructions known to exist, e.g. old

basement floors, old foundations, timbers, etc., should be broken out at pile or stone column positions

and the excavation backfilled. Where an unexpected obstruction is encountered it may be preferable

that piling should be halted at that position until such time as the obstruction can be dealt with, rather

than attempting prolonged hard drilling.

Provision of cut-off trenches

A cut-off trench may be regarded as analogous to a noise screen, in that it interrupts the direct

transmission path of vibrations between source and receiver. It should be noted that there are serious

limitations to the efficacy of trenches. For maximum effect the trench should be as close to the source

or to the receiver as possible. The trench should have adequate length and adequate depth. With

normally available excavators on site, trench depths are seldom in excess of 4 m or 5 m. The length of

the trench needed would be a function of the relevant plan dimensions of the piling site and the

structure to be protected. Cut off trenches are not considered practical on this site.

Measurement

Monitoring

In order to ensure optimum control of vibration, monitoring should be regarded as an essential

operation. In addition to vibration monitoring, static tell-tale measurements can also be used.

Precision tell-tales are capable of registering longer term trends and can provide early warning of

impending structural problems. It should be remembered that movement can occur as a result of

conditions not directly connected with the transmission of vibrations, e.g. the removal of supports

from retaining structures to facilitate site access. `A thorough engineering appraisal of the temporary

works proposed for the site should be made at an early stage.

Methods of measurement

The method selected to characterize building vibration will depend upon the purpose of the

measurement and the way in which the results are intended to be used. Although a measurement

technique which records unfiltered time histories allows any desired value to be extracted at a later

stage, it may not be strictly necessary for the purpose of routine monitoring.

The number of measurement positions depend upon the size and complexity of the building. When

the purpose is to assess the possibility of structural damage, the preferred primary position is in the

lowest storey of the building, either on the foundation of the outer wall, in the outer wall, or in

recesses in the outer wall. For buildings having no basement, the point of measurement should be not

more than 0.5 m above ground level. For buildings with more than one storey, the vibration may be

amplified within the building. In the case of horizontal vibration, such amplification may be in

proportion to the height of the building, whereas vertical vibration tends to increase away from walls,

towards the mid-point of suspended floors. It may therefore be necessary to carry out measurements



(which should be simultaneous if a transfer function is required) at several other positions to record

maximum vibration magnitudes.

When the building is higher than four floors (approximately 12 m) additional measuring points should

be added every four floors and at the top of the building. When the building is more than l0m long,

the measuring positions should be selected at a horizontal spacing not exceeding 10 m.

Measurements should be made on the side of the building facing the source. When the purpose is to

evaluate human exposure to vibration in the building, or to assess the effect of vibration on sensitive

equipment within the building, measurements should be taken on the structural surface supporting

the human body or the sensitive equipment. When ground vibration sources are being considered, it

is usual to orientate the transducers with respect to the radial direction, defined as the line joining the

source to the transducer. When studying structural response to ground vibration it is more usual to

orientate transducers with respect to the major and minor axes of the building structure. If it is not

possible to make measurements at the foundation, transducers should be well coupled to the ground.

Parameter to measure

With an impulsive source of vibration, it is usual to measure the peak value attained from the

beginning to the end of a drive. It is also usual to measure in terms of peak particle velocity (p.p.v.,) if

the risk of damage to the building is the primary concern, and there is also an interest in. human

reaction. If the concern is purely for human tolerance, then acceleration is the preferred parameter.

In the case of sensitive equipment, it is necessary to check the environmental vibration limit data

supplied by the manufacturer and select accordingly.

Record sheets

An important aspect of monitoring vibrations is the preparation and maintenance of records of salient

details of the site observations. The format to be adopted will vary according to the circumstances

appropriate to each investigation.

Trial measurements

The various formulae which have been developed empirically to predict vibration levels at a receiving

point do not take into account variability of ground strata, the pile-soil interaction process, coupling

between the ground and the foundations, etc. Hence these formulae can only provide a first

assessment of whether or not the vibrations emanating from a site are likely to constitute a problem.

More accurate assessment can be achieved by the “calibration” of the site, i.e. the establishment of a

site-specific formula.

The preferred method is to cast a 1 m cube of concrete and to drop it from a height of 1.5 m. A range

of heights can however be employed, varying between 0.5m and 2m. The point of impact should be

well away from adjacent structures. Vibration measurements may also be taken on structures to

provide information on the coupling between the soil and the foundations and amplification effects

within a building. A range of impact energies should be used to encompass the energy levels

associated with the intended piling works.



15.0. PROPOSED CONSTRUCTION PROGRAMME

To be confirmed subject to receipt of planning permission.



2HQ I CONSULTING ENGINEERS LTD

Office 6, Burnell Court, Northern Cross,

Malahide Road, Dublin 17, D17 RX47

Windmill, Porterstown, Clonsilla, Dublin 15 Construction...

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