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Method Statement (Excavation and Tank Construction) AIT Waste Water Treatment System


AIT Waste Water Treatment Facility: Excavation & Construction of the tank

Document History Version

Description

Number 1

Date

Original

Author

05/04/2013 N.McH

i

Checked T.S


AIT Waste Water Treatment Facility: Excavation & Construction of the tank

Table of Contents Document History ................................................................................................................. i 1.0

Scope of Works ......................................................................................................... 1

1.1

Works Description .................................................................................................. 1

1.2

Works Location ....................................................................................................... 1

1.3

Name and Address of Contractor Undertaking the Works ..................................... 1

1.4

Works Programme .................................................................................................. 1

2.0

Health & Safety ......................................................................................................... 1

2.1

Applicative Legislation ........................................................................................... 1

2.2

Risk Assessment ..................................................................................................... 2

2.3

Particular Residual Risks and Risk Mitigation Consideration ................................ 3

2.4

Personal Protective Equipment ............................................................................... 3

2.5

Monitoring and Inspection ...................................................................................... 3

2.6

Emergency Procedures ........................................................................................... 3

2.7

Emergency Contact Numbers ................................................................................. 3

3.0

Works Requirements ................................................................................................. 3

3.1

Site Access .............................................................................................................. 3

3.2

Required Documentation ........................................................................................ 3

3.3

Services & Utilities ................................................................................................. 4

3.4

Other Relevant Information .................................................................................... 4

3.5

Supervision and Labour .......................................................................................... 4

3.6

Plant, Tools and Equipment .................................................................................... 4

3.7

Materials ................................................................................................................. 4

4.0

. Works Methodology ................................................................................................ 5

4.1

General .................................................................................................................... 5

4.2

Construction Sequence ........................................................................................... 5 ii


AIT Waste Water Treatment Facility: Excavation & Construction of the tank

5.0

Works Sequence ........................................................................................................ 6

6.0

Quality ....................................................................................................................... 6

7.0

Environment .............................................................................................................. 6

7.1

Controls ................................................................................................................... 6

7.2

Protection to Waterways ......................................................................................... 7

8.0

References ................................................................................................................. 9

Sponsor Acceptance ............................................................................................................ 11

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AIT Waste Water Treatment Facility: Excavation & Construction of the tank

1.0 Scope of Works 1.1 Works Description The work associated with this document involves all activities required for the execution and supervision of bulk earthworks operations and construction of the waste water treatment plant at AIT.

1.2 Works Location Athlone Institute of Technology Dublin Rd Co. Westmeath

1.3 Name and Address of Contractor Undertaking the Works TNLS Contracting Ltd Dublin rd Co. Westmeath

1.4 Works Programme For Duration of Project

2.0 Health & Safety

Operations shall be carried out in accordance with the TNLS Contracting Ltd Management System Manual 2010

2.1 Applicative Legislation Document

Tick if Applicable

Safety, Health & Welfare at Work Act 2005

Construction Regulations(Amendment) 2008

General Applications Regulations 2007

Quarries Regulations 2008

Chemicals Act 2008

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AIT Waste Water Treatment Facility: Excavation & Construction of the tank

2.2 Risk Assessment No.

Risk Assessment

Page No.

3.1.1

Existing Services

32

3.1.4

Gas Oil Installations

35

3.1.7

Vehicle Deliveries / Removals of Materials and Plant

39

3.1.11

Work On or Near Live Roadways

44

3.1.31

Gas Installations

67

3.1.33

Public Access

69

3.1.34

Emergency Planning

70

3.1.35

Provision and Maintenance of Safe Plant and Equipment

71

3.1.37

Plant Operators and Drivers

73

3.1.42

Concreting Operations

79-80

3.1.45

Abrasive Wheels

83

3.1.49

Substances Hazardous to Health

88

3.1.60

Personal Protective Equipment

100-101

3.1.61

Manual Handling

102

3.1.62

Children and Young People

103

3.1.65

Drugs and Alcohol

106

3.1.66

First Aid Facilities

107-108

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AIT Waste Water Treatment Facility: Excavation & Construction of the tank

2.3 Particular Residual Risks and Risk Mitigation Consideration N/A

2.4 Personal Protective Equipment Helmet, Safety Boots, Hi-Vis Vest, Gloves, Eye protection and ear defenders are to be worn when using abrasive wheels.

2.5 Monitoring and Inspection The site manager is to monitor the works on a daily basis. There will be irregular visits from TNLS Contracting Ltd. Safety office to audit the works.

2.6 Emergency Procedures A first aid safety kit will be available and will be stored in the Site Office. The foreman is to have the number saved for the local General Practioner & First Aider on his phone.

2.7 Emergency Contact Numbers Name

Organisation

Contact Number

Dr. Brown Bear

General Practioner

0433345910

Dr Murray/Dr. McCarthy

General Practioner

0416853205

Lisa McPartland

First Aid

0877425359

GardaĂ­ & Ambulance Service

Emergency Services

999, 911 or 112

3.0 Works Requirements 3.1 Site Access Main access to the work zone is from either end of the works on the old Dublin Rd or Garrycastle Rd.

3.2 Required Documentation Permit to dig is to be issued at the start of each phase of work. All site staff will have a valid safe pass card and machine operators will have the relevant CSCS cards.

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AIT Waste Water Treatment Facility: Excavation & Construction of the tank

3.3 Services & Utilities Consultations have been made with ESB as the area contains overhead LV lines. Contact has also been made with Eircom as the work zone also contains U-G Eircom ducting. Drawings have been received detailing the location of the electricity, gas and telecommunication services.

3.4 Other Relevant Information The works zone is to be secured on an on-going basis with the aid of pedestrian guard rails, traffic cones and silt fencing will be erected at the banks of crossing.

3.5 Supervision and Labour Position

Name

Responsibility

Contact

Project Manager

Trevor Smullen

Full site supervision.

0857642437

Site Agent

Niall McHale

Full Site supervision

0876988979

Site Agent

Liam Mahon

Full Site supervision

085 4589143

Health & Safety CoOrdinator

Lisa McPartland

Supervision of all safety operations.

0877425358

3.6 Plant, Tools and Equipment General earthmoving equipment will be used: Plant Quantity: 1 no. 1 no. 1 no. 1 no. 2 no x no. 1 no. 1 no. 1 no

Plant Description

Certification:

13.5 tonne excavator 22.5 tonne excavator Roller 6 tonne dumper Submersible pumps S275 , Reinforcement Stores container Site cabin Vibration Poker

Yes Yes Yes Yes Yes Yes Yes Yes Yes

        

3.7 Materials All materials to be used will comply with the Specification Suppliers Quality Plans shall be obtained for materials as appropriate. All material will be delivered in bulk and stored in specifically designated storage areas on the AIT grounds.

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AIT Waste Water Treatment Facility: Excavation & Construction of the tank

4.0 . Works Methodology 4.1 General o

Goalposts and/or barriers to be in place where overhead power lines cross the site complete with warning signs of the overhead service.

o

The Earthworks Foreman will issue a Permit to Dig and advise those carrying out the works of general health and safety issues and the risks associated with services in the area of excavation.

o

The Earthworks Foreman will advise those carrying out the works of environmental issues associated with working in the adjacent to a waterway, and discuss measures that will be implemented throughout construction to minimise impact on the waterway.

o

Access to the site will be restricted to those who are inducted to the site and have attended a toolbox talk. The Site Manager/appointed competent person shall consult the PTD and carry out a walk through inspection of the work area prior to commencing operations.

o

Vegetation and topsoil is not to be stripped 5m either side of fishery sensitive streams until culverts are installed to help prevent runoff entering the stream.

4.2 Construction Sequence

   

 

 

Excavation of Access Road A 6 tonne dumper to be loaded in cut area by 3600 excavator. The topsoil is hauled to form a stock pile near the excavation. A Geo-textile material l(terram) should be placed on the excavated layer. Placing of Stone Place 75mm down hard core on top of the terram with a 3600 excavator. Compaction of hardcore will be carried out in accordance with the requirements of the Specification (Method Compaction). The Section Manager shall ensure that adequate compaction plant is present to achieve the requirements of the Specification before commencement of the earthworks. Excavation of hole Tank to be with a 3600 excavator to the dimension outlined in the drawings, also a to form a 1:2 batter on each face of the excavated hole. Material to be removed off site with HGVs loaded by a 3600 excavator the capacity of each load will be approximately 18 tonnes. Tank Construction (base) Blinding to be located in the bottom of the hole Form work to be erected which forms the shape of the base.

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AIT Waste Water Treatment Facility: Excavation & Construction of the tank

 

  

Steel fixers to tie reinforcement to form a cage with regards to the specification in the drawings Concrete to be pour to the specified concrete strength outline in the design. The use of vibrating poke will be use in the pour. Tank Construction (Walls) Form work to be erected for the walls The required reinforcement will be tied vertically out of the starter bars which were located in the base of the tank. Wall to pour with concrete to the required concrete strength.

Supervisory staff At all times of working, an experienced competent supervisor (Earthworks Foreman) will be present on-site. When the supervisor will be absent from the deposition area for a prolonged period a competent General Operative nominated by the supervisor will be responsible for organising the works in accordance with the directions given by the supervisor. The earthworks site engineer will control levels and ensure works are being carried out in accordance with the design. Removal of material to tips Where material classed as unacceptable cannot be used for landscaping purposes within the site, remove to designated tip or temporary storage for drying out using 3600excavator and HGVs.

5.0 Works Sequence As above

6.0 Quality

Responsibility for the quality of the work rests with the Site Management and inspections will be taking place on a daily basis.

7.0 Environment 7.1 Controls o

General  All necessary precautions in accordance with the Contractors Environmental Management Plan shall be adopted for these work activities.  De-mark area as ESA  Erect Silt Fencing as required

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AIT Waste Water Treatment Facility: Excavation & Construction of the tank

o o

o

o

o o

 Ensure all pumps are bunded  Ensure no fuelling signs are erected. Temperature Requirements  None envisaged for this operation. Dust Control  During periods of dry weather dust shall be suppressed particularly on haul routes. Working Hours  Normal Working Hours within the Site are:  Monday to Friday 07.00 to17.00 Saturday 08.00 to16.00 Traffic Conditions  Where these operations affect public roads the requirements of the Contract in relation to diversions and traffic management shall apply. Vehicle Routing  Designated Haul Routes shall be established. Environmental Screening  Noise Attenuation screening shall be provided in accordance with the requirements of the Department of the Environment, Heritage and Local Government.

7.2 Protection to Waterways o

o

Chemical and Fuel Spills  All refuelling of plant will take place at an allocated location on site. This location will allow for sufficient reaction to a potential fuel spill before any fuel enters the ground or drains. A spill kit will always be present on site. 

Hydraulic fluid leaks will be addressed, using the spill kit that will be present on the site as soon as they are identified. The plant in question will immediately be moved to a safe area where leakage of fluid can be safely controlled.

Pumps being used to drain areas will sit in bunded impermeable areas or drip trays to collect any oil or fuel spills. These bunded areas/drip trays will be inspected daily and soakage sand will be removed and replaced as required. Any hydrocarbon contaminated soakage sand will be removed from the site and disposed of appropriately.

Stockpiles will be adequately protected to prevent sediment run-off. This protection will likely take form of a silt fence correctly erected at the base of the stockpile.

In dry conditions, when dust levels from the stockpile become significant, the stockpiles will be sprayed with water to reduce the volume of dust.

Stockpiling

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AIT Waste Water Treatment Facility: Excavation & Construction of the tank

o

Mobile Plant and Machinery  Plant and machinery will not be tracked trough or operate within any area where works are not to be completed. 

Excavator tracks shall be cleaned regularly to limit unwanted movement of loose soils around the worksite.

Plant will be visually inspected daily (paying particular attention to hydraulic fluid hoses and fuel reservoirs) and an inspection card will be completed on a weekly basis. Plant will be stood down until any leeks or faults have been repaired.

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AIT Waste Water Treatment Facility: Excavation & Construction of the tank

8.0 References Permit to dig for the area in question Request for Inspection or Works Health and Safety Construction Regulations Health and Safety Plan Environmental Management Guide

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AIT Waste Water Treatment Facility: Excavation & Construction of the tank

We the undersigned have read and understand the attached method statement and will comply with the methodology therein. If unforeseen circumstances arise outside the scope of those originally envisaged within the Method Statement, we will seek further advice and request amended method statement.

Document & Briefing given to:

Position

Signature

(Insert Name Below)

10

Date


AIT Waste Water Treatment Facility: Excavation & Construction of the tank

Sponsor Acceptance

Approved by the Project Sponsor:

__________________________________________ Project Sponsor: AIT

11

Date: ___________________


Method Statement (Construction & Operation of Tank)