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NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 METHOD STATEMENT OF LEAK TEST FOR MANHOLE (DOCUMENT CLASS: X) Issue Purpose For Approval Rev Date Page Description Prep'd Chk'd App'd Feb/03/2015 All For Approval L.V.S C.N.T D.M.C Operation Centre JOB Code: Responsible Company: Vinaconex E&C Operation Centre Doc No.: Prepared by: Checked by: Approved by: Le Van Son Cao Nguyen Thang Do Minh Chau Page of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 CONTENTS PURPOSE SCOPE OF WORK REFERENCES DOCUMENTS 3.1 PROJECT SPECIFICATIONS S-000-1312-1001V CONSTRUCTION SPECIFICATION FOR SITE PREPARATION AND EARTH WORK S-000-1310-Q001V DETAILED ENGINEERING DESIGN DATA FOR CIVIL AND STRUCTURE S-000-1320-1001V CONSTRUCTION SPECIFICATION FOR CONCRETE WORKS S-000-1671-0916V INSPECTION AND TEST PLAN FOR SITE CONCRETE WORK 3.2 DRAWINGS FOR CONSTRUCTION D-000-1320-1001V CONCRETE WORKS GENERAL NOTES D-000-1320-1002V TO 1004V STANDARD DETAILS FOR REBAR ARRANGEMENT D-000-1320-1005V STANDARD DETAILS FOR CONCRETE STRUCTURES GENERAL ARRANGEMENT CONSTRUCTION DRAWINGS FOR MANHOLES CONSTRUCTION DRAWING FOR PIPES 3.3 STANDARDS AND CODES ORGANIZATION CHART MACHINERY AND EQUIPMENT MATERIALS 6.1 Concrete Brick 10 Page of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 6.2 Rebar (Reinforcement) 10 6.3 Structure Concrete 10 6.4 Formwork 10 6.5 Joint Materials 10 MANPOWER 10 RESPONSIBILITIES 11 PROCEDURE AND SEQUENCE 12 9.1 Mobilization 12 9.2 Equipment setting-up 12 9.3 Setting out 12 9.4 Layout Marking 13 9.5 Execution of Leak Test for Manhole 13 10 INSPECTION AND TESTING 23 11 HEALTHY, SAFETY AND ENVIRONMENT (HSE) 24 11.1 Responsibilities 24 11.2 Safety measures 24 11.3 Environmental protection measures 24 11.4 First Aid 25 12 WORKING IN CONFINED SPACE 25 12.1 GENERAL REQUIREMENT 25 12.2 COMMUNICATION 27 12.3 PERSONAL PROTECTIVE EQUIPMENT 27 12.4 RESPIRATORY PROTECTION 27 12.5 ELECTRICAL EQUIPMENT INSIDE A CONFINED SPACE 27 12.6 GAS CUTTING AND BURNING 28 Page of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 12.7 TRAINING IN RELATION TO WORK IN A CONFINED SPACE 28 12.8 WORKPLACE INSPECTION 28 12.9 RESCUE 29 13 APPENDIX 30 PURPOSE The purpose of this Method Statement is to describe the methodology involved in the works of Leak Test for Manholes and Pipe and detail the steps to be taken in meeting the technical standards and HSSE requirements of NSRP Complex Project SCOPE OF WORK This Method Statement covers the works related to inspection and leak detection (if any) for all the manholes which are located at the areas of C200 and C300 to ensure that the entire execution stages of work is done in line with good JGCS’s Engineering practices and compliance with JGCS’s Engineering standard practices, national and local codes Page of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 REFERENCES DOCUMENTS 3.1 Project specifications S-000-1312-1001V 3.2 Construction Specification for Site Preparation and Earth Work S-000-1310-Q001V Detailed Engineering Design Data for Civil and Structure S-000-1320-1001V Construction Specification for Concrete Works S-000-1671-0916V Inspection and Test plan for Site Concrete Work Drawings for construction D-000-1320-1001V Concrete Works General Notes D-000-1320-1002V to 1004V D-000-1320-1005V Standard Details for Rebar Arrangement Standard Details for Concrete Structures General Arrangement Construction Drawings for Manholes Construction drawing for Pipes 3.3 Standards and Codes TCVN 4453 Concrete structure and Reinforced Concrete Technical Requirements BS 8110 Structural Use of Concrete BS 8007 Code of Practice for Design of Concrete Structures for Retaining Aqueous Liquids BS EN 12390 Testing Hardened Concrete Page of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE BS EN 12350 BS EN 13263-1 Contractor Doc No VV3120-008-A-137 Rev.0 Testing Fresh Concrete Testing Concrete in Structures - Part 1: Cored Specimens Taking, Examining and Testing in Compression BS 1881 Testing concrete Page of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 ORGANIZATION CHART Project Manager: Vu Ba Dat Milestone schedule QS section for contract, quantity, payment Site Manager: Do Minh Chau Directly in charge for daily schedule, mobilization of equipment, materials supply capacity QC Section QC Manager: CN Thang QC field Eng.: NV Thu, PH Tien ITP, Laboratory, Inspection, Records Batching plant, material supply - Batching plan - Capacity of supply, access in and out, record, quantity control, store Site Engineer LN Hoan, VD Sang, TN Thach, NQ Hieu Survey, daily schedule, location of work, equipment control, labor for each kind of works Construction Team - Foremans - Labors for works - Minor tool and equipment, submaterials, form and scaffolds HSSE HSSE Manager: PN Giang HSSE Supervisor: LH Trung, VN Hai,HD Bach, DT Ninh Equipment HSSE control, Permit, access way, Traffic, Labor entry, HSSE training, HSSE at work place Const Equipment Condition and number of Equipment, fuels, drivers, transportation, traffic control, signal, service Page of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 MACHINERY AND EQUIPMENT • Prior to using any machineries/equipment at site, it will be inspected and certified by qualified person • Periodic Preventive Maintenance will be made by all equipment and machineries All operators and drivers are to be educated with valid driver's license/operator's license or permit from concerned government agency • Only authorized drivers and operators are allowed to operate equipment and machinery • Only authorized signalman will be assigned together with the driver or operator Equipment Name, Capacity N Year of o Manuf Origin s Excavator 2010 Japan 1994 Japan 2 Crane truck 5T Page of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 Tamping rammer MIKASA 2001-2011 Japan 2010 China 2000 China 2012 Vietnam 2012-2014 China 2013 Japan 2010 Japan 2010 Japan 2008-2011 Japan, Vietnam 2008-2010 Korea, China 2008-2010 Japan 2010 Japan 2010 Japan Air compressor Bending and Cutting machine, D32 Welding machine, 250A Needle concrete vibrator Water pump Survey instrument NIKON 10 11 Automatic Leveling machine: NIKON Batching plant 12 Concrete agitator truck m3 13 Concrete pump car 60 m3/h 14 Bulldozer 15 Roller • MATERIALS All material shall conform to the appropriate specification or standards listed above Page of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 unless/otherwise approved by Contractor All material shall either carry a quality certificate from the approved source or be tested to the • satisfaction and approval of Contractor 6.1 Concrete Brick Concrete brick shall be used for construction of Temporary wall for plugging opening holes on Manholes, it shall be removed after completion of Leak test 6.2 Rebar (Reinforcement) Rebar for Concrete work (at the connection location between RC Pipes and Manholes) shall comply with ASTM A-615 Grade 60 and approved by JGCS (refer to D-000-13201001V Drawing) 6.3 Structure Concrete Concrete using for installation of Pipes (GRP Pipes or RCP Pipes) is concrete type Mix-A which comply with Specification S-000-1320-1001V and Drawing D-000-13101Q01V 6.4 Formwork The contractor shall use Plywood or steel formwork All the formwork surface need coated by dedicated oil for avoid adhesive to concrete element surface 6.5 Joint Materials All joint materials shall be approved by JGCS and the Employer prior to use MANPOWER - Prior to working any work at site, all workers will be trained safety and certified by JGCS’ HSE - All workers must to have name card for travel on the site Table 7.1: LIST OF MANPOWER FOR LEAK TEST WORK No Manpower Equipment (ea) Manpower Driver of excavator 2 Driver of Mobile crane Note Page 10 of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE 12.2 Contractor Doc No VV3120-008-A-137 Rev.0 COMMUNICATION Adequate means of communication between people inside the Confined Space, the Confined Space Entry Attendant, the CONTRACTOR'S Security Personnel, and the Medical Centre must be established and operational Any entry outside site normal hours shall only occur with the express permission of the HSSE Manager who shall ensure medical and rescue services are maintained on site The Entry Attendant shall ensure that communication with personnel inside the Confined Space is maintained at all times to allow a summons for assistance 12.3 PERSONAL PROTECTIVE EQUIPMENT Any person working in a Confined Space shall wear an approved safety harness where there is a potential for the environment to become immediately dangerous to life and health A lifeline shall be attached and secured outside the Confined Space and a harness shall be the means to assist in the retrieval, unless a greater hazard is created If the internal atmosphere has the potential to become oxygen deficient or contains toxic gases, appropriate respiratory protection shall be worn Protective clothing is to be worn where hot works or irritating substances may be encountered If supplied air is being used by persons in a Confined Space sufficient supplied air resources are to be available on standby for any rescue 12.4 RESPIRATORY PROTECTION In circumstances where the nature of the work to be performed in the confined space will introduce new contaminants, such as welding, grinding, use of epoxy resins, solvents,liberation of contaminants from wall, etc additional precautions may be required in regards to PPE 12.5 ELECTRICAL EQUIPMENT INSIDE A CONFINED SPACE Electrical tools and equipment shall be connected thorough a Residual Current Device (RCD) located outside the Confined Space All leads that must enter vessels and tanks shall be routed through a protective nozzle or over a protective shroud to prevent damage to the outer sheath of cables Wherever possible, all leads, cables, hoses etc shall be routed through openings separate from Page 27 of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 those used for entry by personnel, and maintained clear of any water All electrical equipment shall be shutdown when the Confined Space is not attended, such as crew breaks etc The cables shall be located, suspended or guarded to minimise accidental damage All welding equipment and leads shall be inspected for cracks, cuts and breaks In insulation Where there is any doubt of safe condition they shall be checked by an authorised licensed person and faults rectified before use 12.6 GAS CUTTING AND BURNING Compressed gas cylinders, other than those used as part of a breathing apparatus, shall not be taken into a confined space Gas cutting equipment shall be inspected and leak tested prior to the introduction of hand pieces and hoses into a Confined Space All gas cutting and burning equipment shall be shutdown at the cylinders and removed when the Confined Space is not attended or when not in use, such as crew breaks etc All gas cutting and burning equipment shall be fitted with flashback arrestors at both the hand piece and regulators for oxygen and fuel gas 12.7 TRAINING IN RELATION TO WORK IN A CONFINED SPACE All persons who are to undertake work associated with Confined Space are required to complete approved training prior to any involvement in this work All personnel conducting work in relation to confined spaces shall have received training in accordance with the National Training Accreditation Standards and the training scope be recognised against AS 2865 Safe Working in a Confined Space (certification validation period 12 months from date of issue) The CONTRACTOR will make available a Site Specific Confined Space training course on the Permit and Procedural requirements of the project, however, it remains the responsibility of the Subcontractor or employer in the case of the CONTRACTOR’S personnel to verify the competency of all persons who enter, supervise or control entry to Confined Spaces in accordance with AS 2865, and the requirements of this procedure 12.8 WORKPLACE INSPECTION Page 28 of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 Whenever persons are working in a Confined Space, regular visits by the Confined Space entry supervisor or other nominated and responsible persons must be made They shall inspect and ensure that the requirements of the Permit are being complied with and that site HSSE requirements are being maintained 12.9 RESCUE The CONTRACTOR and Subcontractor shall ensure that prior to entry into any Confined Space, an Emergency Plan is in place, known by all personnel associated with the Confined Space and that rescue platforms, equipment and personnel are in place and available at all times during entry The details of the Emergency Plan shall be determined by risk assessment based on the nature and complexity of the Confined Space and discussed with the CONTRACTOR’S Emergency Response Coordinator Where there is a disagreement on the requirements of the Emergency Plan, the CONTRACTOR'S Site HSSE Manager shall determine the appropriate requirements, and this decision shall be final Page 29 of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE 13 Contractor Doc No VV3120-008-A-137 Rev.0 APPENDIX APPENDIX : JSA & RA JOB SAFETY ANALYSIS Step Work Activity/Step Hazard Control Measures - Responsible Person Mobilization of equipments Collisions with public road users Adhere to all road rules Drivers Give sufficient warning using vehicle indicators Park legally and out of the path of traffic Attach and activate amber flashing light to warn traffic users Drive to the conditions Equipment oil leakage during operation Daily check of the equipments prior to start of work Regular monitoring of the equipments in order to control and Surveyor, Supervisor, Driver prevent oil leakage and other engine trouble Oil or fuel supplying time, a funnel-shape inlet shall be Survey Works Instrument failing down and hit a workman Plastic sheet or a drip underneath of the fuel •prepared Area where the instrument is totray be set must be weli Surveyor, Supervisor, Instrument dropping to ground by accident compacted • Focus and concentrate all the time during work execution worker Surveyor, worker Stuck into the muddy area • Always beware and walk on designated access Supervisor, HSE Engineer Page 30 of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Pegs splatters into the eye Contractor Doc No VV3120-008-A-137 • Always wear safety PPE Rev.0 Supervisor, HSE Page 31 of 41 NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Step Work Activity/Step Contractor Doc No VV3120-008-A-137 Hazard Rev.0 Control Measures Responsible Person Engineer, worker Transportation & Delivery of Equipment and Materials Watering & Dewatering Stricture of nearby workers or falling by carriers as a * Set measures to prohibit workers from entering the site and result of not implementing measure to prohibit control nearby workers by dispatching a guidance workers from approaching Worker, Supervisor Overturning of pump car due to not placing the outrigger of pump on firm ground • Set using support for out-rigger after checking ground condition Worker, Supervisor Drivers & Operators Overturn pump car and collision with ready mix concrete truck due to uncertified operators • Check equipment operation and certification of pump car & truck operators/drivers HSE Engineer, Supervisor Pump equipment (Diesel Engine) oil leakage during Daily check of the equipments prior to start of work operation Regular monitoring of the equipments in order to control and prevent oil leakage and other engine trouble Sound horn to warn people of your presence HSE Engineer, Supervisor, Drivers & Operators, workers Provide sundry containment protection under the equipment to prevent contamination of the soil by oil spillage Construction of Temporary Wall (Masonry Work) Electric shock due to without ground external box on Provide adequate ground and circuit breakers pump Designate electrician/operator for the pump equipments Falling of material while transportation causes Pre-use checking is carried out prior to starting work injuries to worker Ensure lifting accessories with adequate capacity have been Collision during construction elected HSE Engineer, Supervisor, HSE Engineer, Worker, Operator, Supervisor Traffic route plan Adequate instruction for loading/ Unloading and direction of Construction Install warning Signs Page 32 of 41 ` NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE step Work Activity/Step Hazard Contractor Doc No VV3120-008-A-137 Rev.0 Control Measures Responsible Person Untidy work areas Work areas and passage ways to remain clear at all times Rubbish and materials are to be removed on an ongoing basis Fumes Ensure adequate ventilation Workers must wear dust mask or respirator Constant Air monitoring to be carried out by a competent person using a suitable, correctly calibrated gas detector Unauthorized Access Atmosphere to be monitored for oxygen content, airborne concentration of flammable contaminants and airborne concentration of potentially contaminants Stand by Person to monitor harmful entry/exit points to confined space Signage to be installed to warn against entry by other unauthorized people Barricade Work Area Leak Test Process Backfilling Works Person falling from monitored place Using fully body harness HSE Engineer, All workers must be participated training working at height before get permit to work Supervisor, Worker Slip and trip of workers • Implement method statement/ procedures on safe backfilling Supervisor, works Workers Fall of workers and tools /equipments Strict supervision during backfilling works Wearing of the required PPE HSE Engineer, Supervisor, Drivers & Operators, Assign licensed and experienced operators Page 33 of 41 ` NGHI SON REFINERY AND PETROCHEMICAL PROJECT Contractor Doc No VV3120-008-A-137 Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE No Work Hazard Activity/Step Classification H Mobilization of equipments Hazard Identified S E • • Impact P Collisions with public road • users Initial Risk E A R S P RF • • • High Control Measures Adhere to all road rules Rev.0 Action by Drivers ; Residual Risk S P RF 1 Low Medium Give sufficient warning using vehicle indicators Park legally and out of the path of traffic Attach and activate amber flashing light to warn traffic users Drive to the conditions Ensure traffic management plan is approved and implemented where required • • Equipment oil leakage during operation • • • • High Daily check of the equipments prior to start Surveyor, of work Supervisor, Regular monitoring of the equipments in Driver order to control and prevent oil leakage and other engine trouble Oil or fuel supplying time, a funnel-shape inlet shall be prepared Plastic sheet or a drip tray underneath of the fuel tank shall be set Page 34 of 41 ` NGHI SON REFINERY AND PETROCHEMICAL PROJECT Contractor Doc No VV3120-008-A-137 Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE No Work Hazard Activity/Step Classification Survey Works H S • • • • Hazard Identified E Impact Initial Risk Control Measures Rev.0 Action by P E A R S P RF Instrument falling down and hit a workman • • • • 3 Medium • Area where the instrument is to be set Surveyor, must be well compacted Supervisor, • Instrument dropping to ground by accident • • • • Medium * Focus and concentrate all the time during work execution • Stuck into the muddy area • • • • 3 Medium • Always beware and walk on designated access • Pegs splatters into the eye • • • • 3 Medium • Residual Risk S P RF Low worker Surveyor, Low worker Supervisor, Low Low Set measures to prohibit workers from Worker, entering the site and control nearby Supervisor workers by dispatching a guidance Low Set using support for out-rigger after checking ground condition Low Always wear safety PPE HSE Engineer Supervisor, HSE Engineer, Transportation & Delivery of Equipment and Materials * • • Stricture of nearby • workers or falling by carriers as a result of not implementing measure to prohibit workers from approaching • • • High • • • • Overturning of pump car • due to not placing the outrigger of pump on firm • * • 3 Medium • Worker, Supervisor Drivers & Page 35 of 41 ` NGHI SON REFINERY AND PETROCHEMICAL PROJECT Contractor Doc No VV3120-008-A-137 Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE No Work Hazard Activity/Step Classification H S Hazard Identified : E Impact P E Initial Risk A R S P Rev.0 Control Measures RF ground • Watering & Dewatering • • • • • Overturn pump car and collision with ready mix concrete truck due to uncertified operators Action by Residual Risk S P RF Low 1 Low Low 1 Low Operators • • • • 3 Medium • Check equipment operation and certification of pump car & truck operators/drivers HSE Engineer, Supervisor Pump equipment (Diesel • Engine) oil leakage during operation • • • 3 Medium Daily check of the equipments prior to start of work Regular monitoring of the equipments in order to control and prevent oil leakage and other engine trouble Sound horn to warn people of your presence Provide sundry containment protection under the equipment to prevent contamination of the soil by oil spillage Construction of • Temporary Wall • • Electric shock due to without ground external box on pump • Falling of material while transportation causes • • • • High Provide adequate ground and circuit breakers Designate electrician/operator for the pump equipments • • • 3 Medium • Pre-use checking is carried out prior to starting work - HSE Engineer, Page 36 of 41 ` NGHI SON REFINERY AND PETROCHEMICAL PROJECT Contractor Doc No VV3120-008-A-137 Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE No Work Hazard Activity/Step Classification H S Hazard Identified E {Masonry Work) Impact P E Initial Risk A R S P Control Measures Rev.0 Action by RF injuries to worker Collision during construction Ensure lifting accessories with adequate capacity have been elected Traffic route plan Residual Risk S P RF Low Low Worker, Operator, Supervisor Adequate instruction for loading/ Unloading and direction of Construction Install warning Signs Competent rigger/ Signal man trained Lack of suitable PPE • • • • Medium Daily Check for PPE for each worker HSE Provide fully dedicated device for working Engineer, at night such as: flash lamp, life jacket, Supervisor, reserve alarm Working in Confined Space • • • Entry and exit from Confined Space: Slips/Trips/Falls Unsafe Oxygen Level • • • • High Use of fixed ladders, platforms, and walkways for access/exit Ensure Access points are unobstructed HSE Engineer, Supervisor, Atmospheric testing to be carried out to determine exposure levels Air monitoring to be carried out by a competent person using a suitable, correctly calibrated gas detector Page 37 of 41 ` NGHI SON REFINERY AND PETROCHEMICAL PROJECT Contractor Doc No VV3120-008-A-137 Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE No Work Hazard Activity/Step Classification H S Hazard Identified E impact P E Initia A R S Risk P Control Measures Rev.0 Action by RF Residual Risk S P RF Low Low Low Low Atmosphere to be monitored for oxygen content, airborne concentration of flammable contaminants and airborne concentration of potentially harmful contaminants Ensure adequate ventilation (natural or mechanical) • • • • • • Fire and Explosion Engulfment Poor Lighting • • • • * • • • 3 High High Ensure flammable gas, vapour or mist HSE does not exceed 5% of its lower explosive Engineer, limit (LEL) Supervisor, Avoid any Hot Work Ensure Electrical equipment is tested and approved * Ensure suitable adequate lighting for all HSE the working area Engineer, Supervisor, • • • Noise affect to worker healthy • • • • Medium ♦ Workers to wear ear muffs/ear plugs HSE Engineer, Supervisor, • • • Untidy work areas • • • • 3 Medium • Work areas and passage ways to HSE Page 38 of 41 ` NGHI SON REFINERY AND PETROCHEMICAL PROJECT Contractor Doc No VV3120-008-A-137 Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE No Work Hazard Activity/Step Classification H S Hazard Identified E Impact P E Initial Risk A R S P Control Measures Rev.0 Action by RF remain clear at all times Residual Risk s p RF Low Low 1 Low Engineer, • Rubbish and materials are to be removed Worker, on an ongoing basis • • • Fumes • • • • Medium Ensure adequate ventilation Workers must wear dust mask or respirator, HSE Engineer, Supervisor, Constant Air monitoring to be carried out by a competent person using a suitable, correctly calibrated gas detector Atmosphere to be monitored for oxygen content, airborne concentration of flammable contaminants and airborne concentration of potentially harmful contaminants • • • Unauthorized Access • • • • Medium Stand by Person to monitor entry/exit points to confined space Signage to be installed to warn against entry by other unauthorised people HSE Engineer, Supervisor, Barricade Work Area Leak Test • • Person falling from • • • • 3 Medium • Using fully body harness HSE Page 39 of 41 ` NGHI SON REFINERY AND PETROCHEMICAL PROJECT Contractor Doc No VV3120-008-A-137 Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE No : Work Hazard Activity/Step Classification H S Hazard Identified : E Process Impact P E Initia A R S Risk P monitored place Backfilling Works • • Slip and trip of workers Control Measures • • Fall of workers and tools /equipments Action by RF Resit fual Risk S P RF Low Low • All workers must be participated training Engineer, working at height before get permit to Supervisor, work Worker • • • • 3 Medium • Implement method statement/ procedures on safe backfilling works • Rev.0 • • • • 3 Supervisor, Workers Medium Strict supervision during backfilling works HSE Wearing of the required PPE Assign licensed and experienced operators Assign experienced and trained personnel/workers Engineer, Supervisor, Drivers & Operators, workers Risk Assessment Matrix Page 40 of 41 ` NGHI SON REFINERY AND PETROCHEMICAL PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 HSE Risk Assessment Matrix Probability Rating Potential Consequence Severity Severity People (P) Environment (E) Assets (A) Reputation (R) No Injury/ Near miss No Effect/ Near Miss No Damage/ Near Miss No Impact/ Near Miss Rating Never Heard Of in Every >3 in Every 1-3 in Every Million Man- Million Man- 250K-1 Million hours hours Man-hours in Every 100K-250K Manhours LOW RISK: SCORES OF - No further action is required Slight Injury/Illness (First Aid Treatment Case) Minor Injury/Illness (Medical Treatment Case) Minor Effect Minor Damage Limited Impact Major Injury/Illness (Lost Time Injury/Illness) Localized Effect Localized Damage Large Impact Single Fatality (Fatality/Permanent Disability) Major Effect Major Damage Major National Multiple Fatalities Massive Effect Slight Effect Slight Damage Slight Impact MEDIUM RISK: SCORES OF – Reduce as low as reasonably practical (ALARP) HIGH RISK: SCORES OF ABOVE Unacceptable, Risk must be reduced to Medium or Low Risk Extensive Damage Major International Page 41 of 41 ... METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 har d bar r icade Rev.0 har d bar r icade WATER LEVEL FOR LEAK TEST el : el : el : LEAK TEST FOR CONNECTION JOINT... PROJECT Title: METHOD STATEMENT OF LEAK TEST FOR MANHOLE Contractor Doc No VV3120-008-A-137 Rev.0 Excavation Work and Installation Work for the Pipes Leak test (Leak Test at Position of Connection... Pipes Manhole) Not ok Repair Joint Ok Backfilling Work for Pipes (After Completion of Leak Test) Table 9.5.1: SEQUENCE FOR EXECUTION OF LEAK TEST FOR MANHOLE AND PIPES Page 14 of 41 NGHI SON REFINERY