combined method & risk drilling &...

Site: Harry Perks Street Job No. 153515 Date: 17/8/15 of 22

Method Risk – Drilling & Grouting

COMBINED METHOD & RISK Drilling & Grouting

DIVISION GROUND STABILISATION

PROJECT/TASK INVSTIGATION AND TREATMENT OF SHALLOW MINE WORKINGS

CLIENT GALLIFORD TRY CONSTRUCTION CENTRAL

DATE 23 October 2015 REVIEW DATE 23 November 2015

VE CONTACTS Contracts Manager PAUL GROCOTT Tel No.

Foreman TBC Tel No. TBC

Safety Advisor GARY LEVERS Tel No.

Revision Status

Rev 0 Name Position Date Signature

Prepared by:

PAUL GROCOTT CONTRACTS MANAGER

Reviewed by:

JOHN BAGGOTT DIVISIONAL DIRECTOR

Accepted by:

Rev No. Revised by Date: Amendments



BRIEFING SHEET

This method statement MUST BE briefed to the foreman responsible for the works as part of the pre start briefing. The Divisional Director is responsible for ensuring this is done. The foreman shall brief all site operatives and sub contractors on site before commencing work. Everyone must sign off on the Method Statement Briefing Sheet to confirm that they have been briefed and that they understand the risks and controls, and their responsibilities.

Where work cannot be carried out in accordance with this method statement, the foreman shall stop work & discuss any concerns with his Manager & await further instruction. All parties shall then be briefed on any changes to the method of work.

Initial briefing given by:

Name Signature Date

Initial Briefing

By signing this method statement, I confirm that I have been briefed on its contents and understand my responsibilities detailed within.

I understand that I must stop work and notify my Line Manager if I cannot complete my work in accordance with this method statement.

Details of amendments

Details of amendments



1. Scope of Works (MUST be completed by person compiling the Method Statement)

Van Elle Limited has ben instructed by Galliford Try Construction Ltd to carry out the consolidation and stabilisation of former mine workings. The works will be based on recommendations in CIRIA Special Publication 32.

The works will consist of the Investigation and Treatment of shallow workings beneath the newly proposed residential properties as shown on the tender documents. The works involve drilling and grouting an initial 6m grid with centre hole (effectively a 4.25m coverage) to investigate the shallow workings within the proposed area.

The grouting will be carried out via means of loose bulk pulverised fuel ash and ordinary Portland cement. The cement will be delivered in bags on pallets and shrink wrapped. The ash will be delivered in 20 ton 6 wheel tipper trucks and we expect between 4 and 5 deliveries a day. Cement will be delivered in 28 ton batches and we expect 1 possible 2 deliveries each week. Empty cement bags will be disposed of into a skip provided by Galliford Try. Pumping of the mixed PFA / OPC grout will commence via a 3/6ton paddle mixer and agitator. This in turn will be pumped to each borehole via a 3” sandpiper. Grout will then be injected under hydrostatic pressure (0.1 bar per metre of overburden) until the borehole is topped up and deemed to be full.

2. Hazard identification (MUST be completed by person compiling the Method Statement) All hazards identified must be assessed and control measures in place to reduce the risk to an acceptable level.

Site Access & Egress X Material Storage X Contaminated land

Work Platform & Rig Stability X Ventilation / Fumes Night Work

Underground Services X Lighting Working at Heights

Site Security X Housekeeping X Confined Space

Gas & Mine Gas X Gradients / Sloping ground X Railways Rig Guarding X Adjacent Structures X Waterways

Noise & vibration from drilling X Third Parties X Traffic & Highways X

Dust generation X Excavations Public Footpaths/Areas X

Traffic management Overhead Services Deliveries X

Collapse of shaft infill or overburden Flooding Concrete pumping / pouring X

3. Method of Work and Control Measures 3.1 Prior to work commencing

The Main Contractor / Client will be responsible for

• Carrying out site-specific inductions to Van Elle employees

• In accordance with HSE guidance HSG47, the location, identification and marking of underground services within the working area, and taking the necessary precautions to protect and avoid them. (eg isolation, diversion, shrouding etc).

• Providing a suitably maintained working platform.

• Providing suitable Welfare facilities including toilet, canteen (chairs with backs), provision of hot water and microwave

• Advising on known or likely ground contamination.

• Signing the Van Elle Permit to Work to confirm the above has been completed.

• Obtaining appropriate permissions/licenses from the local water authority to extract water using a standpipe or supply an appropriate amount of water to allow the works to progress

• Obtaining Coal Authority Permits where required

Member of Contracts shall ensure:

• A visit to site is carried out prior to work commencing.

o Site specific hazards are identified and suitable control measures identified.

o Presence of cracks on any structure within 10m shall be recorded on site visit report.

o Platform requirements are communicated to the client/main contractor.



• Where work involves drilling through coal seams, a site specific gas risk assessment is carried out to determine necessary control measures to protect against spontaneous combustion and gas migration

• That crew deployed to site have necessary competencies

Foreman NVQ Drilling Operations / SSSTS

Banksman In house training and CSCS as a minimum

Telehandler Driver CPCS Telehandler

Grouting operative In house training and CSCS as a minimum

The Foreman shall:

• Walk the work area & confirm that all hazards are adequately controlled prior to work commencing.

• Comply with Galliford Try’s Permit to Dig

• Ensure no operative is unfit for work and that operatives are fresh and ready.

• Ensure that client/main contractor has provided a working platform that is adequately constructed and maintained so as to provide a stable base for the rig.

• Ensure that all areas are clear of obstacles

• Check that the client / main contractor has carried out checks / protection for underground services and sign off Contract Notes

• Ensure that sufficient PPE provisions are available & that it is worn in accordance with Van Elle & Main Contractor requirements. Mandatory PPE is safety helmet, safety footwear, light eye protection and & hi-viz clothing including long sleeved vests/ coats and hi vis trousers.

• Check that the drilling rig, lifting accessories and other plant have in-date certification before use

• Ensure that daily inspections are carried out on all plant and equipment & a record of inspection completed. Any problems/defects must be reported to the Contracts Manager immediately. All machinery shall only be operated by trained & competent persons.

• Ensure that the Permit to Work is signed prior to work commencing.

• Brief all operatives on the method statement and risk assessment and repeat on a fortnightly basis

• Ensure all operative understand RA/MS and sign to confirm briefing attendance

• Attend all daily and progress meetings

• Encourage a positive health and safety reporting ethos

• Delineate the working area from third parties / general public

• Ensure fuelling up of rigs is carried out correctly

3.2 Mobilisation

All vehicles will be supervised by a Banksman and enter site as per the designated route agreed at pre-start meeting. Initial mobilisation will consist of the following loads:

• 1 No. Low Loaders carrying a rotary percussive drill rig each with ancillary equipment

The foreman shall

• Make sure any building, driveway or footpath is protected before any unloading takes place.

• Assess the area designated for unloading, taking into consideration, other contractors, traffic routes etc. Safety barriers may need to be used to segregate our work from other activities and/or pedestrians.

• Make sure that all loads are checked for security before unloading commences. In the event of a load having moved or become unstable in some way during transport, unloading will not continue until a safe means of unloading has been determined. Unstable loads should not be allowed to tip or fall to the ground unless there are no other safe options & only after advice has been sought from the Line Manager

• Agree a sequence of unloading with the delivery driver. The Banksman will take control of the unloading process & directing the HIAB operator.

• Lift plans will be put in place for each and every lift including HIAB’s and Telehandlers

• All plant operatives will have in date medicals (fit for work)



Any provisions for unloading that are already on site will be used to safeguard work at height. Where possible equipment & materials will be pre-slung to facilitate offloading. Access to trailers will be from a secured or footed ladder. All trailers must have either edge protection or all items must be preslung and the operator shall use a remote control on the ground.

Avoid unloading rigs on inclines. The Banksman will position himself forward of the loading process so that all rig movements and the rig operator are clearly visible. NO ONE must be allowed to stand at the side or behind the vehicle being unloaded. All instructions to the rig operator must come from a single Banksman.

3.3 Site set up

The crew shall maintain good housekeeping at all times to reduce slip/trip hazards especially at ground level at night when visibility is low.

All cracks on any structures within 10 m of the working area must be marked. Cracks must be monitored for movement a minimum of twice per day. Should any movement be recorded, stop work and telephone your manager for instructions

The foreman will set up an exclusion zone to prevent third parties entering our work area.

Telehandler only to work in segregated area whilst unloading / loading / providing materials to grouting operative

Pedestrian barriers to be used to prevent plant/personal interfaces

Ply sheeting and visqueen will be used where necessary to protect property and surfaces

Avoid running water hoses through public areas. If this is unavoidable, ie, when the supply is located in the road or footpath, use hose ramps to reduce the risk of slips/trips. Signs, cones/barriers must also be in place.

Compressed air, water and grout hoses, will be kept tidy and positioned away from walkways etc

Drips trays will be placed beneath plant as required.

The grout station shall be set up on firm level ground. Use visqueen sheeting and sand bags to provide bunding where necessary. In windy conditions, ash should be protected or dampened to prevent dust clouds. Hydrants will be closed off using red and white pedestrian barriers. Should hoses have to cross highways or footpaths they will be covered with ramps and appropriate signage will be placed. The route of the hoses will be inspected throughout the day (minimum of 3 times) to check for damage, leaks and security. The water hoses within the public domain will be removed at the end of each shift and the hydrants closed and placed in secure storage.

3.4 Drilling and Grouting Procedures

Main Infill Grouting

The main works boreholes will be drilled on a nominal 6m grid with centre hole to 1m below the targeted seam. The grid may change locally dependant upon ground conditions and the Engineers assessment.

The surficial deposits will be cased off and workings will be grouted under hydrostatic pressure.

Pressurized test holes will be carried out systematically to ensure treatment in each area is complete. Test boreholes will be pressurized to 10kPa per metre of overburden to ensure all workings are treated.

Should grout takes be excessive secondary and tertiary holes may be required.

The grout will also be a 10:1 PFA/OPC mix which will achieve strength of 1N/mm2 after 28 days.

The flushing medium will be WATER to prevent the potential for mine gases migrating off site. There will be flush returns from the drilling especially in boreholes which encounter no workings. In accordance with VE’s quotation Galliford Try are responsible for the control of runoff and surface water.

Validation of the Works

Validation of the works will be carried out by pressurized test holes in locations determined by the Supervising Engineer. No test hole will be drilled until grout placed within 20m has been allowed to cure for at least 24 hours.

Test boreholes shall be drilled at the locations and depth specified by the Supervisor and shall be logged by a geologist. A test is deemed to have passed by the following criteria:

• The borehole does not encounter a void (or combination of voids) which could propagate to rock head (as calculated by a ratio of 1:10, void to thickness of overlying rock).

• That the borehole does not accept more grout than a 20% increase in the grout volume of a nearby borehole (or boreholes) which did not encountered a significant void.



• That the borehole, once filled, can maintain an agreed pressure for a period of 2 minutes following a pressure loss of no more than 10% below the agreed pressure.

Test holes will not be carried out until the grout has had sufficient time to set. This will typically be at least 24 to 48 hours later.

Mine Gas Risk and Mitigation Measures

The following control measures are required for reducing risk from mines gas:

• WATER flush used in all positions

• Operatives to wear personal gas monitors

• Recording of daily gas readings to be carried out and assessed

The following records will be taken & recorded

Gas monitor type* delete Position Frequency of test

CO, CO2, CH4, H2S, Combined Rig / Personal Constant

Monitoring will be carried be all drilling operatives using a BW gas alert micro clip XT personal monitor or similar.

The use of WATER as the flushing medium will decrease the risk of mine gas to LOW risk (as shown on Table 6.2.7 of the Coal Authority Guidance document).

All work will stop if gas concentrations approach or exceed the concentrations listed below:

Gas Levels

Methane 5-15%

Hydrogen Sulphide 5 ppm

Carbon monoxide 30 ppm

Carbon dioxide 5,000 ppm

Specific PPE for drilling is hearing protection within 5 metres of rig, gloves, & respiratory protection where airborne dust is present.

Rigs will be set up, operated & moved around site in accordance with manufacturer’s instructions by competent operatives. Whipchecks must be used on all compressed air connections.

Two persons must be in attendance at all times when operating or moving the rig.

Interlock guards fitted to rigs must remain in place throughout the drilling process. Where drilling cannot be completed with guarding in place, the Foreman will stop work and seek further instruction from the Contracts Manager. Any instructions must be recorded & briefed to the crew.

Drill rods will be added until the desired depth (1m below target seam) is achieved. Where possible, drill rods should be added / removed by mechanical means. Where this is not possible use good manual handling techniques. Team lifting to be used to reduce the burden on individuals. Rods stored vertically will assist manual lifting.

Store all drill rods and tools in a safe place close to the front of the rig to minimise the carrying distance. Keep the area around the rig will be kept clear of excess arisings to reduce trip hazards.

Position hands away from the bottom of the rods when lifting into position to prevent trapping of hands.

Isolate the compressed air, water or grout flow before adding / removing drill rods.

Dust suppression to be used. (shrouding of guard with hessian, water spray etc) Dust masks will be worn by operatives where airborne dust is present.

Where drilling with water or grout, ensure that measures such as digging channels, sumps, or Siltbuster® are used to protect watercourses.



3.5 Grouting

PF Ash will be delivered in 20 Ton Tippers each day, we expect between 6 and 8 loads per day. Cement will be delivered in bags on pallets and will be delivered in 28 ton loads. Mixer operator will be responsible for the mixing and pumping of grout to the correct ratio & consistency, the grout should be 10 parts PFA to 1 part OPC and must achieve 1 MN/m2 at 28 days.

Specific PPE for grouting is goggles, hearing protection, long-sleeve overalls, gauntlets & respiratory protection with minimum P3 protection.

Do not stack cement pallets more than 2 full pallets high. Protect cement from rain using polythene (visqueen) sheets secured so that the wind cannot dislodge sheeting. Safe access for the telehandler must be taken into consideration

Stack cement so that the mixer operator does not have to bend or stretch to lift cement bags. Bags should ideally be between waist and chest height.

Empty cement bags must be disposed of following specific site instructions into provided skips.

PF Ash will be added by a loading shovel. The driver will ensure that the area is clear of obstructions & that his visibility is not impaired. The loading shovel should be a safe distance from mixer when mixer operator is adding cement.

PF Ash dust will be controlled by dampening down and heras fencing with demolition netting attached if required. Should it be noted that dampening down is being ineffective then plastic sheeting shall be applied at the end of the day. In order to keep dust down stockpiles of ash will be kept at a minimum and ordering will be on a daily basis.

The grout line will consist of 3” lay flat which in turn will be reduced down to two 2” inch lines via a Y shaped reducing splitter. Each 2” grout line will have a gate valve fitted at the end to prevent grout loss and spillage.

When a borehole is full, pumping must be stopped and hose moved to next borehole, grout hose must be moved using safe handling techniques.

When washing out, ensure all grout in mixer has been discharged down a borehole or to a specified place on site. If using compressed air, keep pressure to a minimum and secure the end of the hose to prevent it whipping.

If a blockage occurs it must be carefully dealt with due to the build up of back pressure. The pump operator must stop pumping immediately. Instruct personnel to move to a safe position (minimum 10 metres) before opening any

joints. A stockpile of sandbags will be kept immediately adjacent to the grouting silo / pumps / mixers to prevent surface runoff of grout into the nearby water course.

The pipeline must be treated as being pressurized at all times. Goggles must be worn by operatives dealing with blockages.

To release the back pressure a pressure release valve should be fitted between the pump and first grout hose, allowing back pressure to be released before disconnecting any hoses

When access is needed inside the grout mixer, for example, to clear blockages,

• Lone working is not permissible; Pump as much grout out as possible until the obstruction is visible

• Isolate the air supply to the mixer by disconnecting the airline from the compressor.

• Remove the guard. Use secured ladder/steps to gain access.

• Once the obstruction is removed, replace & lock off the guard before reconnecting the air supply to the mixer.

Specific PPE for grouting is goggles, hearing protection, long-sleeve overalls, gauntlets & respiratory protection with minimum P3 protection.

All equipment will have an in date inspection certificate and be well maintained.

Grout hose must be moved using safe handling techniques.

Any blockages in the grout hose must be carefully dealt with due to the build up of back pressure. Goggles must be worn by operatives dealing with blockages

When washing out, ensure all grout in mixer has been discharged down a borehole or to a specified place on site. If using compressed air, keep pressure to a minimum and secure the end of the hose to prevent it whipping.

Empty cement bags must be disposed of following specific site instructions



3.7 Security

Foreman will make sure that adequate measures are taken to prevent the theft or unauthorised use of equipment/materials. This will include locking away all tools in the van or lock up, removing keys from plant & equipment where fitted, when not in use and left unattended & using cab guards & control arm covers if fitted.

3.8 Leaving Site

The Rigs will be cleaned of excessive spoil prior to loading onto trailers. Rig shall be prepared for transport, configured in accordance with the manufacturer’s instructions. Foreman is responsible for completing final checks to make sure all securing bolts & pins are correctly fitted and that the rig is safe to transport. Before setting off, the driver must check that all loads are secure.

The mixer and all grout ancillary equipment need to be cleaned prior to leaving site to prevent lines and the mixer becoming blocked with cured grout. The lines will be washed out with water and then cleared with compressed air to ensure all materials and moisture are clear.

The mixer will be disconnected from any airlines and cleaned out by two operatives. One operative will climb into the mixer to remove any cured grout from the paddles and bottom. This will be done under the supervision of a second operative watching from above. At no time will a single operative be alone within the mixer.

All grout materials will be disposed of in the correct waste reciprocal.

3.9 Welding

Visually inspect welding equipment; ensure all leads & connections are undamaged. The earthing clamp must be placed on a suitable earth.

Ensure the working area has sufficient ventilation. Remove all combustible materials from working area. At least 1 no. 2kg extinguisher in proper working order must be kept in the immediate area of the work and used immediately smoke or smoldering or flames are detected.

Third parties must be protected from welding hazards with the use of screens.

Wear the correct PPE: full face shield, long sleeve flame retardant overalls, leather gauntlets, safety boots and respiratory protection when required.

The work area must be inspected approximately 60 minutes after the completion of work and immediate steps taken to extinguish any smoldering or flames

4. Communication and Liaison

Van Elle site operations will be under the full-time supervision of a competent and experienced Foreman holding a SSSTS qualification. The Site Forman for this project will be confirmed.

The Foreman will be responsible for daily routine operation; preparation and submission of all Daily Records; receiving and acting upon formal Site Instructions; and reporting site conditions which may require significant variations to this Method Statement. Both the foreman and contracts manager will attend any regular progress meetings held on site. The site foreman will also contact weekly tool box talks with all VE operatives.

The Foreman will report directly to the Contracts Manager / Director on a regular routine basis or on specific instances when necessary. The Foreman will also attend the daily briefings held by the site agent and update them on that day’s workload and works carried out to date.

The Divisional Director responsible for this project is John Baggott.

Site Safety Tours are carried out at regular intervals by our Safety Advisors and Contract Management Personnel. Van Elle. A culture of reporting near misses and dangerous occurrences / environments exists at Van Elle and all operatives will be encouraged to report near misses

5. Emergency Plans

Before commencing work, the foreman must brief all operatives on site of the emergency procedures that must be carried out in the event of: fire, accident, large spillages (fuels, oils or grout) flooding and equipment failure. Should



any grout line become blocked operatives must alert the nearest pump operator immediately. This is to be done via hand signals. Once the pump is turned off, the procedure described above will be carried out.

Should any pipe burst the grout will be controlled by sand bags to prevent surface runoff into local watercourse. The grout will be allowed to harden to allow its removal to take place in a more controlled orderly manner.

Main contractor will induct all site operatives into the site emergency arrangements, including evacuation plans.

Van Elle crews are equipped with a number of 2kg dry powder extinguishers and first aid provisions to complement the main contractor’s arrangements.

Emergency First Aid & Fire awareness training has been completed by the crew.

Spillage kits will be provided and our crews instructed in their use.

All accidents & Near misses must be reported directly to the Van Elle Safety Dept. and the Main contractors site manager

Mines Gas

All work will stop if the gas alarms sound. All equipment will be switched off and the immediate area evacuated. Smoking will not be permitted. Allow area to ventilate before rechecking gas readings. Backfill borehole when safe to do so. In accordance with the specification and guidance from the Coal Authority literature the chances of mine gas from boreholes is LOW due to water being the flushing medium.

Coal Authority 01623 646 333

SERVICE STRIKES

Electric - Switch machine off & evacuate all personnel on the ground. Do not attempt to disengage the cable from the

rig. Do not touch exposed cables.

Gas - Switch all machinery off & evacuate all personnel to safe distance. Extinguish all naked flames. No smoking. Gas emergency number is 0800 111 999

FIRST AID INFORMATION AND EMERGENCY ACTIONS FOR COSHH SUBSTANCES

• Inhalation - Remove casualty from exposure ensuring your own safety whilst doing so. Keep casualty warm &

at rest. Seek medical attention

• Eyes –Irrigate with plenty of water, if irritation persists seek medical attention.

• Skin – Wash with soap and water, remove contaminated clothing

• Ingestion - wash mouth / nose out with water, DO NOT induce vomiting. Seek medical attention

SPILLS Eliminate sources of ignition. Contain spillage in booms or sand or absorbents. All contaminated items & oil must be returned to your office/depot & be disposed of at an authorised disposal facility.



SITE SPECIFIC RISK ASSESSMENT

Persons Affected: Van Elle operatives, Other contractors, members of public

Significant hazards Initial risk

Control Measures Residual

risk Responsibility

Site wide risks

Medium

• Site visit by contracts.

• Site induction.

• Mandatory PPE at all times – safety helmet, high visibility clothing, protective footwear, eye protection, gloves – head torches to be worn at night, white light front facing and red and the rear.

Low All

Contact with underground services

High

Permit to Work to be signed by the Clients senior representative on site or by a senior manager employed by Van Elle prior to any drilling work commencing. In accordance with our Permit to Work System, if for any reason the following cannot be achieved, the office will be notified before work commences.

• Drawings shall be available on site for utility providers

• Galliford Try to issue “permit to work”

• The working area and 5 m surrounding the working area has been scanned with Cable Avoidance Tool used by a competent person

• Any services within the working area and 5 m surrounding have been exposed and their location marked clearly across the whole of the working area

• Drilling rigs must not be operated within 1000mm of a service

• Underground Services will always be assumed to be live

Low All

Mines gas

Spontaneous combustion

Gas migration to nearby properties

High • Coal authority permit & gas risk assessment.

• Gas monitoring, WATER as flushing medium Low Contracts

Working platform

• Overturning rig or machinery High

• Qualify working platform requirements and responsibilities prior to work commencing.

• Maintenance of working platform in accordance with the contractual requirements throughout the contract.

• VE Foreman not to enter on to platform until completed. Foreman to monitor during our operations & report to Main Contractor / VE Contracts Manager

Low

Contracts Manager

Foreman

Plant & vehicle movements

• Obstruction of footpaths at site access and egress points;

• Other road / site traffic movements,

• Collision with surrounding structures or plant/equipment during rig movements

High

• Agreed access routes for deliveries lorries with the main contractor

Low

Contracts Manager

• Site speed restrictions will be adhered to

• Vehicles must have sufficient lighting in work areas prior to moving

• All lighting including task lighting must be on at all times

• Consideration of the room required for manoeuvring the machine. Check for obvious hazards & obstructions such as soft ground, narrow gaps, limited head-room, steep

Driver

operator



gradients, adverse cambers, and excavations

• All reversing vehicles & rig/plant movements will be conducted under the direction of a Banksman

Foreman, Banksman

Loading & unloading of drilling rigs

• Damage to road surfaces / pavements

• Plant or equipment falling from transport vehicle

• Slips, trips falls

High

• At pre-start meetings, identify what provisions/requirements the MC has, such as dedicated unloading areas, platforms &/or air mats that must be used

Low

Contracts

• Establish suitable safety zone. Anyone not involved in the mobilisation to be kept clear. Safety barriers may need to be used to segregate the lift from other activities and/or pedestrians. Vehicle warning beacons will be used in public areas

• Loading/unloading on level and stable ground, under the direction of a Banksman

• Check security of loads & agree sequence of unloading. Ratchet strap must be checked for damage. Load must be checked for any movement prior to removing straps.

• Plant & machinery offloaded by lorry mounted winches fitted with D-shackle. Open hooks must not be used under any circumstances

• Protection of roadway/footpath e.g. by the use of mats/plywood etc when rig/plant equipment is being loaded/unloaded on the highway

Foreman

• Trailer posts or kingposts used down the trailer edge to prevent items rolling off the edge. Items that are liable to roll will also be chocked if they do not already have them.

• Inspection of trailer to ensure it is safe to walk on, that there are no holes or signs of damage & that it is not slippery. Report any defects.

• Track mats will be used where there is steel on steel e.g. steel tracks on a steel trailer bed, to reduce risk of rig/plant equipment sliding off the side of the ramps/low loader

Driver

• Nobody to stand at the side of the vehicle being loaded/unloaded including the Banksman

• Use of ramp (if fitted) to access the vehicle or trailer. Climbing up the sides of trailers is not permitted. No-one should ever jump onto or off a vehicle – always use steps & handholds.

All Staff

Fall from height

• Whilst accessing trailer.

• If struck by moving or falling loads

High

• Where possible, work at height to be avoided by using telehandlers or pre-slinging of loads.

• Use of edge protection fitted to the sides of trailers. Where edge protection is not fitted, injury from falls from height will be minimised by the provision of air bags, or temporary platforms.

Low

Foreman

• Safe means of access and egress via proprietary ladder or step system that is part of the lorry, or a properly secured ladder.

• Inspect ladders for signs of damage & be free from mud or grease.

• Ladders must extend past the trailer bed to enable you to step off whilst still having 3 points of contact

• LOOKING where you’re going - DO NOT walk backwards whilst on the trailer. DO NOT RUSH! DO NOT USE A MOBILE PHONE

• Where possible, the unloading should take place with nobody being on the vehicle. When this is unavoidable:

All Staff



o Keep the number of persons on the lorry to a minimum

o Ensure that the person on the trailer is well out of the way when the load is being lifted.

o The initial instruction to lift the load must be given by the person on the trailer

Lorry mounted crane operations

• Overturning of the crane may occur through the following;

o Ground conditions.

o Tampering with safety devices.

o Lifting of loads above the Safe Working Limit.

• Collision with surrounding structure

• Failure of lifting equipment

• Damage or injury to passing vehicles & pedestrians by the position of outriggers, crane or load movements or when visibility is restricted

High

• Crane & Lifting accessories to have in date Thorough Examination

Low

Transport Mgr

• All crane movements & lifts will be completed under the direction of a Banksman Foreman

• The operator & Slinger signaller will ensure they are aware of the safe working load before the lift commences. Do not overload SWL of crane or lifting accessories

• No one will be allowed to stand at the side of the vehicle being loaded/unloaded including the slinger/signaller

• Do not allow the load to swing over or into live traffic lanes or over people

• Lifting equipment will not be used for towing or pulling

All staff

• The crane, lifting accessories and all safety devices to be inspected daily & the daily check sheet completed.

• Fully extended outriggers will be used at all times. Outriggers must not be positioned where the ground could collapse e.g. on soft ground, at the edge of excavations, on or over manholes, chambers, drains, services etc.

• Outrigger mats must be placed under outriggers on all lifts. Where additional support is needed, sleepers should be placed UNDER the outrigger mats so that the load is evenly spread. Off-cuts of wood found on site are not acceptable alternatives.

• Where a HIAB has factory-fitted remote controls, these must be used at all times to allow the operator to stand in a position of safety

• A test lift will be conducted to make sure the lift can be carried out safely e.g. to check levels, outriggers don’t sink, load is stable etc.

• No loads will be left suspended.

• Lifting points on loads shall be checked for signs of damage prior to being lifted.

• Only propriety lifting points on loads will be used; Only recognised slinging techniques will be used; Tag lines will be used when necessary.

Crane Operator

Drilling rig operations

• Injury due to poor condition of equipment

• Collision with pedestrian & other plant

• Machine overturning due to Unstable ground conditions

• Bodily injury from entanglement with rotating / moving drill rods

High

• The rig must have a current Insurance inspection certificate and must be available on site.

• Trained & competent operators of drilling rig. Trainees can operate under direct supervision of experienced rig operator

• Rigs to be fitted with interlock guards to prevent access to rotating drill string. Where interlock guards are not practicable, a site specific risk assessment must be completed by Contracts Manager before work continues

Low

Contracts

• Daily inspection of all equipment, and during use by the rig operator. Any signs of damage must be dealt with according to procedure.

• Whipchecks to be fitted on compressed air hoses; Hoses to be visually inspected, daily

Foreman



• Noise

• Inhalation of dust

• Eye & bodily injuries from flying debris

• Fluid / air injection from burst compressed/hydraulic hoses

• Slip trip over hoses

• Manual handling of drill rods

before use.

• All water lines to be inspected daily at least 3 times

• All rig movements will be completed under the direction of a trained and competent Banksman

• Interlock guards to be fitted to rigs. Where interlock guards cannot be used consult Contracts Manager. Implement exclusion zone around front of rig with barriers. Nobody to enter exclusion zone when drill string is rotating. Two trip wires must be operational. Banksman in attendance at all times whilst the rig is active.

• Dust suppression to be used; Shrouding to contain ejected materials

• Isolation of compressed air / water supply before adding / removing drill rods

• Where possible, drill rods should be added / removed by mechanical means. Where this is not possible, drill rods should be stored close to the work area to minimise the carrying distance. Rods stored vertically will assist manual lifting

• Ear protection will be worn within 5 metres of drilling rigs; Position compressors away from work area.

• Dust masks will be worn by operatives where airborne dust is present.

• Route air hoses so that they are not across gangways or in a position where they may be damaged. Hoses etc which cross walkways to be covered with ramps & warning notices displayed

• Compressed air will not be directed at any persons (cleaning clothes / horseplay)

All staff

Telehandlers

• Risk of load falling due to uneven ground, overloading or unbalanced loading of telehandler.

• Driver falling or being thrown from machine

• Machine overturning due to unstable ground conditions, Working on steep inclines, overloading, falling into excavations or down bankings

• Crush injuries when adjusting fork width

High

• Confirm maintenance certificate has been provided by the hire company. Conduct pre-use checks & complete the daily inspection sheet. Do not attempt to operate the machine if faults are found

• Only specifically trained & competent operators to be driving the machine. (CPCS)

• Passengers must not be carried. Telehandlers must not be used to lift people.

Low

Foreman

• Even distribution of the load on the forks to maintain balance

• Transport loads as close to ground level as possible to minimise the distance loads can fall and to increase stability

• Ensure visibility is not impaired when travelling. Where impaired visibility cannot be avoided, banksman must be used

• The machine operator will know the lift capacity of the machine, to prevent a tip-over.

• Telehandlers may only be used as a crane if they are equipped to do so. Lifting accessories must only be shackled to a lifting eye. Chains should not be wrapped around the forks. Check that the load does not exceed the lifting capacity of the machine

• Always use the seatbelt.

• Never jump down from the cab. When climbing in and out of the cab always use the steps and grab rails.

• Prevent crush injuries when adjusting forks by tilting fork frame forward so that the forks

Machine operator



swing freely away from the frame

Grouting mixing operations

• Burns & irritation from contact with grout

• Inhalation of cement dust

• Bodily injury from entanglement with rotating / moving machinery during operations & when cleaning

• Slips, trips and falls

• Open boreholes

• Bagged Grout Usage

High

• Trained & competent operators to use the grout mixer Contracts

• Plan the site layout taking into consideration the prevailing wind direction & nearby properties.

• All plant & grout hoses shall be inspected before being used. All damaged equipment shall be returned to the yard for repair.

• Water hoses running across public areas must be adequately guarded with warning notices & cones. Hoses must be tucked tight to the kerb. Where a hose crosses a road or pavement it must be covered by a clearly visible ramp.

• Hoses to be sheaved / protected in operating area from site vehicles and regularly inspected for damage

• Adequate guarding of all moving parts on pump. (Interlock switches must not be by-passed).

• Stock piles of PFA should be shielded, covered or kept damp to cut down airborne dust.

Foreman

• Machine operators should minimise dust by emptying ash into the mixer in a controlled manner. Over-filling & erratic movement of the bucket should be avoided.

Telehandler operator

• Ensure that hoses don’t get kinked. Protect them against other site vehicles.

• Complete isolation of machine before cleaning or maintenance. A second person will always be in attendance. Secure ladder access

• Good housekeeping. Ensure machine and mixing area is level and clear of debris. If possible, stone up muddy areas; keep hoses tidy and away from pedestrian areas.

• Impervious PPE to be worn i.e. gauntlets, footwear, leggings (no shorts allowed) and arms and legs will be covered

• FFP3 dust masks to be worn. Ensure dust masks are effective by ensuring they are tight fitting & not repeatedly removed.

• Minimise dust by emptying dry materials into the mixer in a controlled manner. Do not shake bags.

• Cement pallets to be stacked maximum 2 full pallets high. Protect from rain with visqueen sheets. Safe access for telehandlers must be taken into consideration

• Stack cement in a suitable position to reduce the need for the mixer operator to bend or stretch to lift cement bags. Bags should be between waist and chest height at all times, either stacked on pallets or left on forklift so working height can be adjusted as necessary

• Grouters to stand clear whilst loading shovel is emptied

• Grouting operatives will work from purpose built work platforms with handrails on all exposed sides. Where a platform is not provided, operatives may work from a stack of pallets provided the following is implemented:

o Each step change on the stack of pallets is no greater than 2 pallets high. For example if the platform is 4 pallets high it must be surrounded on each of the three sides with pallets stacked two high.

Low Pump Operator



o The pallets are in good condition & are covered with rubber matting to reduce slips/trips & to cover the gaps between the planks

o The platform is cleaned regularly

• Use mechanical means or team lifting to move grout hoses around site

• Antifreeze to be added to water lines at the end of the day to ensure lines do not free

• If using Colmono mixer correct PPE to be used

• Bagged pre blended grout / OPC to be at waist height to prevent bending and lifting of heavy loads

• Care to be taken not to allow any materials into the mixer that might cause entanglement

Hose bursts

• Injury/property damage

• Burns & irritation from contact

High • Additional controls in high risk areas eg shrouding of hoses, positioning of pump, additional

bunding to contain spillages & screens to protect from ejected material;

• Use higher site fencing and if Herras type this must be covered

Low Contracts / Foreman

Dealing with blockages

• Hose whipping

• Strike by high pressure air/grout

High

• Stop pumping immediately & release pressure inside the hose as much as possible

• Treat system as though it is pressurised until confirmed otherwise. Do not under any circumstance manually open or attempt to open the hose under pressure.

• Must wear goggles or full face visor – glasses do not provide adequate protection

• Use gravity to empty as much of grout as possible from the hose

• Protect people against uncontrolled hoses & ejected grout with minimum 10metre exclusion

zone; secure hose to prevent whipping

• Compressed air should only be used as a last resort when clearing blockages.

Low Foreman / Pump

Operator

General manual handling activities

• Uneven ground conditions & obstacles en route

• Dropping the load

• Unstable load

• Increased risk of injury from lifting loads from ground level, from above head height or if the body twists

• Lack of handholds

• Individual capabilities

• Poor coordination of lift

Medium

• Manual handling operations to be mechanised where possible, to avoid / reduce manual handling risks. Eg Use of HIAB& telehandler to move loads.

• Handling of light – medium weight loads will be subject to on-site assessment by foreman & operatives considering the weight of the load, presence of handholds, its stability & centre of gravity & each individual’s fitness & capabilities

• Reduce carrying distances through positioning / storage of materials adjacent to work area

• Good lifting techniques

• Reducing impact on individuals through team lifting - one person will take charge & coordinate the lift.

• Ensuring working platform is kept firm & level to minimise trip hazards

• Ensure area is well lit. Take into consideration the weather conditions (ice etc)

• Completion of manual handling training

Low All Staff

Refuelling plant & machinery

• Fire Medium

• Engines to be switched off prior to refuelling; Re-fuel in well ventilated area.

• No smoking/no naked flames when refuelling; Fire extinguishers to be available in vicinity. Low All Staff



• Pollution of watercourses, drains and sewers through accidental spills and poor storage

• Health risks as per COSHH assessment

• Practice good hygiene; Wear impervious gloves.

• Refuel carefully and prevent spills. Do not overfill tanks.

• Store fuel in secure, vandal proof bunded tanks or jerry cans;.

• Refuelling must not be undertaken within 15m of a watercourse.

• Spill kits are available on site with personnel instructed in their use

Welding

• Fire, explosion & burns caused by sparks or hot material,

• Respiratory problems from inhaling gases & toxic fumes,

• Shock and electrocution,

• Arc eye & exposure to infra-red or UV radiation,

• Trips & falls over cables Medium

• The appropriate protective clothing - welding mask, flame retardant overalls, leather gloves or gauntlets and safety boots must be supplied & worn at all times. Ensure metal objects such as watch straps or rings are covered

• Equipment shall be maintained and inspected. Ensure that the cables, including the component earth cable, are adequate to take the current and are securely connected. Welding lead shall be adequately insulated. All damaged or defective equipment must be reported

• Screens must be used to protect other people in the vicinity

• Remove all combustible materials from the immediate area. Before applying heat, ensure that no residue of flammable substances is on the metal. 2kg dry powder extinguisher to be readily available

• Turn welding equipment off when not in use

• Ensure adequate ventilation is available to remove fumes & vapours. Use mechanical ventilation or where this is not practical, air-fed respiratory protective equipment

• Route cables hoses so that they are not across gangways or where they cause trip hazards or be damaged.

Low All staff

Security

• Unauthorised use of plant by other contractors or trespassers

• 3rd party damage

• Theft of plant, equipment and materials

Medium

• Reduce risk of theft of plant & equipment by eg as removing one wheel or fitting wheel clamps, chaining plant equipment to a fixed object; removing batteries, Fitting control arm covers. Locking small tools that are on hire in the property or van or secure store every night

• All keys must be removed from plant & equipment where fitted, when not in use and left unattended. Hydraulic pressure to be relieved on control levers

• Materials will be safely stacked and stored e.g. pallets of cement stored at one level only to prevent them toppling over if kids climb on them.

• Diesel bowsers locked

• Where Van Elle are responsible for the site, adequate security fencing and sufficient number of construction/mandatory warning signs will be deployed

Low All staff



Environmental Assessment Risk

rating Control Measures

Residual risk

Mobilisation & deliveries

• HGVs can block side roads causing delays however there is the potential for noise & disruption to local community particularly during early deliveries to avoid peak traffic.

• If vehicles or plant being transported are not cleaned prior to leaving site then contamination of the highways & surface drains is possible.

• Fuel consumption & exhaust emissions

High

• Considerate driving & parking - large vehicles parked up clear of site and only brought in when vehicle can be accommodated on site

• Neighbour notifications & planning around busy times

• Wheel washes & cleaning down plant prior to transport if required

• Use low emission fuels, ADBLUE. Switching vehicles off when not in use

Low

Mobile plant operations

• Exhaust emissions from all mobile plant. Black smoke is likely from poorly maintained machinery

Medium

• Servicing of machinery

• Switching off plant when not in use

• Restricted hours of operation

Low



• Cranes use large volume of fuel during operations

• Noise & vibration nuisance issues when working in urban areas, close to existing properties

• Noise levels from all plant will be reduced whenever reasonably practicable.

• All plant will be fitted with efficient silencers Rotary drilling

• Noise & vibration issues when working in urban areas, close to existing properties with potential for damage & neighbour complaints; Rotary percussion hammers (top driven) are very noisy.

• Compressed air connections can be noisy if the connections are not perfect

• Nuisance dust generated from air flush.

• Drilling with or air/mist as drilling medium,

Medium

• Neighbour notifications,

• Change work process, isolation of plant, vibration monitoring;

• Engineering controls (shielding, shrouding, silencers etc) fitted to plant to reduce noise; Regular servicing;

• Restricted hours of operation; switching off plant when not in use

• Use of mist pumps to dampen down, rubber matting & hessian.

• Recycling of water through "Siltbuster" or settlement lagoon

Low

Grouting

• Pollution of drains, gulleys & watercourses particularly when washing down of equipment etc may also be an issue if blockages occur & grout is ejected across site.

• Nuisance dust from mixing grout leading to reduction in local air quality, complaints from neighbours,

• Large volumes of raw materials to produce grout

• Use of water

• Manual mixing of grout generates large volume of waste cement bags which are sent to landfill.

High

• Maintenance of equipment; planning of site set up to minimise blockages.

• Use of bunded areas & additional protection of hoses from damage & containment of hose bursts;

• Site mixing areas at least 10 metres away from a watercourse.

• Ordering to minimise quantity on site;

• Place unused grout in designated area to allow to cure without polluting the ground or watercourses before being disposed of as inert rubble

• Consideration of the use of silos on large projects for PFA and cement;

• Damping down & covering of. Screening around mixing plants;

• Reduction at design stage

• Make sure all water connections and hoses are in good condition, switch off when not being used

Low

Silt produced by many construction activities including excavations, plant & vehicle movement, and rain water run-off from exposed ground

• Reduction in water quality, damage and kill aquatic life

• Flooding due to blocking culverts and channels Medium

• Identification of activities likely to produce silt and their position in relation to surface drains etc.

• Use cut off channels and sumps, “Siltbusters”, or straw bales to act as a buffer.

• Silty water must not be discharged to a drain without prior treatment to remove solids and only when permission from the local sewerage provider has been obtained

Low

Waste Control

• poor storage & handling waste can lead to waste being mixed or sent to incorrect landfill

• Poor storage & handling of waste can lead to leaching into ground and entering drains & watercourses.

• Damage to plants/animals, unsightly windblown rubbish

Medium

• Segregation of waste & recycling; site waste management plans, use of licensed disposal routes;

• Provision of suitable waste containers.

• Housekeeping. Low

Stock control

• Over-ordering of materials & poor stock control; excess waste going to landfill,

• poor storage can lead to materials becoming damaged & unusable; poor site control;

Medium

• Order correct amounts of materials;

• Avoid accepting incorrect deliveries; avoid double handling; Low



COSHH ASSESMENT

Minimal risk associated with these substances during normal use/operations. The controls that have been identified are adequate for the type of work & the quantity / nature of the substances encountered. Products are generally used outdoors or in areas where good ventilation is not a problem, therefore it is unlikely that exposure limits will be exceeded during normal use, or in the event of an accidental release. Where products are being used in a manner different from the way described, a separate risk assessment will be needed



Substance Hazard classifications

Risks to health & environment Precautions

Cement / Pre Blended Grout

• Cement has irritant and corrosive properties, especially when wet, towards the skin & eyes.

• Cement is a sensitiser - prolonged & repeated exposure to wet cement may also lead to irritant and allergic dermatitis developing.

• Prolonged & repeated exposure to cement dust may lead to chronic productive cough (bronchitis).

• Employ good hygiene practices – regularly washing the skin with warm water and soap, and drying the skin afterwards. Use facilities for drying clothes and change clothes regularly.

• Contact with skin should be avoided by wearing impervious protective clothing, including overalls with long sleeves and long trousers

• Goggles must be worn to protect from splashes.

• Gauntlets will help protect hands/wrists but staff must ensure that cement does not become trapped between the glove & the skin.

• Wear respiratory protection when mixing grout. Minimum standard is FFP3.

• Airborne dust should be prevented by only opening bags of cement when needed and by not shaking bags completely empty them.

• The machine operator shall take care not to cause unnecessary airborne dust by not over-filling the loading shovel, carrying less ash & make more frequent trips. Emptying smaller quantities of ash into the mixer rather than tipping the whole bucket in one go.

• Bucket movements should be smooth – banging & jerking the bucket was also seen to cause lots of dust.

• The grout operator should try to stand clear when the loading shovel is being tipped.

Pulverised Fuel Ash

(PFA)

• Not considered to be especially hazardous to health

• However, prolonged & repeated exposure to dust in high concentrations may lead to irritation of the skin, the eyes and the lungs

Bentonite • Prolonged & repeated exposure has been

known to cause symptoms of chronic lung disease such as Fibrosis.

• May cause eye irritation and inflammation.

• As with any abrasive powder it may give rise to minor irritation & Dermatitis

Diesel & Exhaust fumes

• Generally short term effects which disappear when away from the source of exposure.

• Inhalation of vapours & exhaust fumes results in irritation of eyes & respiratory tract; headaches, coughing, chestiness and breathlessness.

• Prolonged or repeated contact with skin can cause de-fatting & dermatitis.

• Ingestion lead to irritation of the mucous membranes, throat and stomach, nausea and vomiting. Liver and kidney damage is possible.

• Turn off engines when not required;

• Re-fuelling in well-ventilated areas- preferably outdoors and away from sources of ignition. Funnels should be used

• Do not eat or smoke in areas where there is likely to be exposure;

• Employ good hygiene practices.

• Wear impermeable gloves during refuelling

• Site powerpacks in well ventilated areas. Use mechanical ventilation &/or tail-pipe filters when working in poorly ventilated areas

Engine Oil Not classed as hazardous

• Hot oil may produce irritant fumes; negligible hazard at ambient temperatures;

• Eye contact may result in slight irritation but does not injure eye tissue

• Negligible hazard if ingested

• Prolonged or repeated exposure of the skin may lead to mild irritation

• Follow manufacturers instructions

• Always read the label

• Always store in original containers

• Keep away from heat sources, open flames & other sources of ignition.

• Spill kits & drip trays should be accessible & used

• Prevent oil especially waste oil from contacting the skin. Vinyl or nitrile gloves



• Long-term repeated exposure to used oil may lead to the production of skin tumours.

must be worn when handling oil,

• Oily rags should not be placed in pockets

• Employ good hygiene practices – regularly washing the skin with warm water and soap, and drying the skin afterwards.

• To be stored in bunded area. Funnel to be used when decanting.

• Do not pour waste oils down drains

Hydraulic oil Not classed as hazardous

• Minor risks associated with normal use. Inhalation of mists may cause irritation.

• Risk of injection injuries when pressurised hydraulic system leaks or bursts.

Various Greases

• Continuous & prolonged exposure to grease may cause irritation of the skin

Linemarker Paint

• Can cause asphyxiation, and irritation to respiratory system, skin and eyes when used in areas with poor ventilation.

• Repeated & prolonged exposure of the skin can result in the de-fatting of the skin

• Pressurised containers - poses more of a fire risk than a health risk and will give off highly toxic acidic fumes if exposed to fire.

• Do not use or store in close proximity to sources of ignition. Wear gloves to prevent paint coming into contact with skin. Do not inhale aerosol mist



ROTARY RIG GUARDING RISK ASSESSMENT

Initial Assessment completed by:________________________ Date:_____________ Briefed to:_____________________

Identify all Pile/Borehole position(s) where interlock guards are NOT practicable: Pile / Borehole position(s) Give reason why Interlock Guards cannot be fitted Identify the control measures to be implemented

Ongoing Assessment by:____________________________

Where site conditions dictate that the standard of guarding (above) cannot be achieved, the foreman shall notify their Contracts

Manager & agree any changes to the risk assessment. All site operatives shall be briefed on the new arrangements.

Pile / Borehole position(s)

Give reason for change to standard of guarding Identify the control measures to be implemented Changes agreed with

Date

combined method & risk drilling &...

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