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FOR APPROVAL B 03-Sep-19 A 29-Jul-19 Rev Date Owner L.K.Quang L.K.Quang Prepared S.I.Yoon S.I.Yoon Checked I.S.Jeon I.S.Jeon Approved REVISED FOLLOWING THE OWNER’S COMMENT FOR APPROVAL Details of Revision Owner’s Engineer Contractor DOOSAN HEAVY INDUSTRIES VIETNAM Sub-Supplier LILAMA CORPORATION Project NGHI SON BOT THERMAL POWER PLANT PROJECT (2 x 600MW) Title METHOD STATEMENT FOR WATER FILLING TEST OF STORAGE TANK Document No Rev NS2-DD09-P0ZEN-740013 B Page-No 30 Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 CONTENTS PURPOSE SCOPE 3 GENERAL 4 ORGANIZATION CHART .4 REFERENCES CODES AND STANDARD TESTING METHOD .5 6.1 6.2 6.3 6.4 6.5 6.6 PREPARATION FILLING TEST PROVISION FILLING OPERATION AFTER FILLING TEST MANPOWER .9 EQUIPMENT & TOOLS 10 ENVIRONMENT, HEALTH AND SAFETY .10 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 SAFETY REGULATIONS FOR EXECUTION VEHICLES: 10 FOR PARTICIPANTS: 11 ELECTRICAL SAFETY: 11 CONFINE SPACE WORK: 12 SAFETY FOR WORKING AT THE HIGH LOCATIONS: 12 SAFE USE OF LIFTING EQUIPMENT IN ASSEMBLY & PREPARATION WORK FOR TESTING: .13 TRANSPORTING MATERIALS AND EQUIPMENT: 14 SAFETY PRECAUTIONS ON USING EXECUTION EQUIPMENT AND TOOLS: 15 INDUSTRIAL HYGIENE, ENVIRONMENTAL PROTECTION: 16 RISK ASSESSMENT AND JSA (JOB SAFETY ANALYSIS) 17 8.1 8.2 RISK ASSESSMENT 17 JSA (JOB SAFETY ANALYSIS) 26 |30 Rev.B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 RECORD OF REVISION Rev Date Page Affected Description of Revision A 29.07.2019 First Issue B 03.09.2019 Second Issue |30 Rev.B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 PURPOSE The purpose of this method statement is to control and measure any changes on the body and foundation level and to prove the integrity of the storage tank body of Storage in Nghi Son BOT Thermal Power Plant with safety, quality and consistently The procedures briefly describes the general method in performing the water filling test after completing all the requirements needed on the specification and applicable code & standards SCOPE This method is made for following storage Tank installation guidance: a Potable water storage tank b Demi water storage tanks c Plant & Fire Water Storage Tanks d Condensate water storage tanks e Light diesel oil storage tanks B f Absorber towers for FGD system g Makeup water tank for FGD system h Limestone storage tanks for FGD system i Emergency storage tank for FGD system j Gypsum slurry storage tank for FGD system k Filtrate tank for FGD system l Any Tank where is construction in the site would be applied in this MS |30 Rev.B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 GENERAL This method statement is applied for water filling test of Field tank only If there are any matters not mentioned in this procedure, then that will be carried out according to relative drawings and standards Project: Nghi Son BOT Thermal Power Plant uses technology of coal firing with capacity 2x600 MW Country: Socialist Republic of Viet Nam Plant type: Coal Fired Thermal Power Plant Capacity: 2x600 MW Scope: Full EPC Fuel: Imported Coal Site: Thanh Hoa Province Owner: NS2PC Main Contractor: Doosan Heavy Industries Viet Nam Subcontractor: Lilama Corporation ORGANIZATION CHART Organization Chart of LILAMA Corporation |30 Rev.B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 REFERENCES CODES AND STANDARD Project Specification requirement; For Construction Drawings Contract Quality Plan Project EHSS Management Plan API 650 Standard ITP for Tank Fabrication and Erection No NS2-DH01-P0ZEN-740005 TESTING METHOD 6.1 Preparation After the entire tank and roof structure is completed but before any permanent external piping is connected to the tank, the shell shall be tested by water filling Test This test must be performed after completing tank erection and finishing all of the welding operation and NDT prior to painting and/or insulation - In preparing the Tank for testing, all temporary attachments welded to the exterior of the tank shall be removed such as alignment clips, fitting equipment, stabilizers & lifting lugs and any noticeable projections of weld metal shall be ground smooth with the surface of the plate - All temporary attachment welded to the interior of the tank, including the shell, roof, tank bottom, roof columns and other internal structures shall be removed and any noticeable projections of weld metal shall ground smooth - Permanent attachment are items welded to the shell that will remain while the tank is in its service This include items such as wind girders, stairs, gauging system, davits, |30 Rev.B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 walkways, tank anchor, supports for internal items such as heating coils and other piping supports, ladders, supports welded to the shell, exterior piping support, grounding clips, insulation rings and electrical conduit and fixtures - Un-floating material as scaffolding frame for painting work would be kept during water filling test - Furnishing, laying and removing all lines from the water source tie-in location and to the water disposal point as prescribed - Checking the wind girders for proper drainage during or following the water filling test If water is retained, additional drainage shall be provided and subject for approval |30 Rev.B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 - Hydrostatic test package shall be submitted for approval before water filling work - The water used for the filling test shall be fresh water as recommended The water B temperature may be at less than ambient temperature 6.2 Filling Test Provision - Interior of the tanks shall be cleaned - Roof manhole (as vent) shall be open during filling and emptying operation (Very Important) - All nozzle below the maximum filling level will be blinded with blanks able to stand the pressure in the respective point - in case there are no isolation valves - Welding joint will not be painted and cleaned to shining metal condition before the test - Appurtenances inside of the tanks such as coils or pipe supports shall have been installed - Settlement monitoring devices shall be provided prior to filling water - Permanent or temporary tank level gauges shall be provided to monitor the water level - Cleaning surfaces (internal/external) completely and pipe and fittings should be carefully cleaned before assembly and any loose jointing material should be removed - Installing of valves and fittings - Temporary water piping and pumps for filling and discharging shall be installed from the tank to water supply point and disposal point - Water filling test shall be commenced and finished during day lights hours And the water temperature should be ambient temperature - Test chart (time & levels) shall be provided |30 Rev.B B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 LEVEL METER WATER TANK (Supply water by water truck) DRAINAGE TO DISPOSAL AREA DRAINAGE TO DISPOSAL AREA Plan for Water Filling Test of Storage Tank 6.3 Filling Operation a Filling may continue while the elevation measurements are being made as long as the change in water elevation for a set of readings does not exceed 300mm (12in) Unless waived on the data sheet, below paragraph shall make shell elevation measurements in accordance with the API 650 standard as following: - Shell elevation measurements shall be made at equally-spaced intervals around the tank circumference not exceeding 10 m (32 ft) The minimum number of shell measurement points shall be eight - Observed elevations shall be referred to a permanent benchmark The level instrument shall be set up at least ½ times tank diameter away from the tank when tank elevation readings are taken Six sets of settlement reading are required: Before start of the water filling test With tank filled to 1/4 test height (+/- 600mm {2 ft} ) With tank filled to 1/2 test height (+/- 600mm {2 ft} ) With tank filled to 3/4 test height (+/- 600mm {2 ft} ) (Test height is the maximum design liquid level) At least 24 hrs after the tank has been filled to the test height, Owner/OE will be invited for inspection and access will be provided for visual examination of all welds This 24 hrs period may be increased to duration specified on the data |30 Rev.B B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 sheet if it only requires for condition such as: o The tank is the first one in the area o The tank has a larger capacity than any other existing tank in the area o The tank has a higher unit bearing load than any other existing tank in the area o There is a question regarding the rate or magnitude of settlement that will take place After tank has been emptied of test water b If settlement measurements are specified, any differential settlement greater than 13 mm per 10 m (1/2 in per 32 ft) of circumference or a uniform settlement over 50mm (2 in.) shall be reported for evaluation c Internal bottom elevation measurements shall be made before and after water filling testing Measurement shall be made at maximum intervals of m (10 ft) measured on diametrical lines across the tank The diametrical lines shall be spaced at equal angles, with a maximum separation measured at the tank circumference of 10 m (32 ft) A minimum of four diametrical lines shall be used d All elevation measurements shall be included in document package 6.4 After Water Filling Test a Gauge measurement and visual inspection shall be assessed and reported together with |30 Rev.B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 o When stopping working for repairs, it is vital to cut off all power to the machine o Machinery, equipment must have adequate safety devices such as fuses, relays, Automatic circuit breakers o Grinding and cutting machines have been protected from flying stones, grinding and cutting wheels must be checked regularly to detect problems - Hand tools: o Hand tools such as spanner, wrench, chisel etc must be grasped firmly in control range o Daily checking must be conducted before putting into use relating to following damages: o Whether handle is not cracked or not o Whether cutting edge is damaged or not o Adjusted details o Hammer handle must be packed firmly with medium length for easy use o Bore bit, turbidity is smooth without burrs o Shipping tools in containers and storage bags provided o Tools used for working on high places must have been tied to avoid falling down 7.9 Industrial hygiene, environmental protection: - On every day, after the work is finished, it is necessary to cleaning up the execution premises, waste, scraps, and collect it in safe places - All waste must be collected - transported - properly handled in accordance with owner’s regulations 18 |30 Rev.B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 Risk Assessment and JSA (Job Safety Analysis) 8.1 Risk Assessment 19 |30 Rev.B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 RISK ASSESSEMENT Job / Task Workers Transportat ion of equipment & delivery of materials Heavy Lifting Works People at Risk worker abnormal physical condition ( Drunken & fatigue) Worker not familiar with the scope of works or workplace hazards Traffic accident Cause of Adverse Effect Slip/ Trip/Fall Collisio n BASE RISK (WITHOUT CONTROL) RESIDUAL RISK (WITH CONTROL) L2 S2 Resi dual Rate (RR N) Check the health condition during the TBM 1 TBM to be filled and discussed by supervisor to workers 1 checking the access road before passing the area Designate a signal man when moving the equipment 2 3 3 L S1 Risk Rate (RF N) 2 Mitigating Controls keep the speed limited 10km/h Defective/Faul ty machinery or tools Falling object Falling object Material fall 4 16 Ensure all required pre-start checklist are carried out prior to start any work Only a qualified and Certified operators Signalman, riggers should be in-place Complied with Viet name Molisa regulations with Circular 44 Preparation of a lifting plan list and plans for lifts from 10 tons or greater Do not stand under the load and working radius of crane Isolated lifting area and warning no access Ensure loads are fixed with Wire sling correctly All lifting equipment must be in good conditions Experienced lifting supervisors at all times 20 |30 Rev.B Method Statement for Water Filling Test of Storage Tank Job / Task Scaffoldin g work Collapse Equipm ent collapse 10 Caught in Squeez ed by the sling 15 Equipm ent collapse 15 Caught in Squeeze d by the material s 12 People at Risk Cause of Adverse Effect L S1 Risk Rate (RF N) Lack of experien ce and knowled ge/ not adequat e PPE Only lifting tools with color coding following site regulation allowed to use All lifting tools must have identification tag (including serial number, certification number, SWL inspection date and due date) Check the Wind speed before Lifting Wind speed 10m/s Check the ground condition and level including any type of matting Ensure that no one touch the load and wire sling before give the signal for lifting 6 2 Use proper hands PPE collision falling hazard, falling from height NS2-DD09-P0ZEN-740013 Ensure distance between steel structure and crane in lifting plan study and communication between signal man and crane operator Put taglines with enough length to the load from the ground during lifting for proper guide control Ensure that no one stay within the restricted area from the load before lifting Barricade the loading / unloading area and crane working radius Designate only one Signalman for Lifting and / or additional signal man for every location ( if necessary) Mitigating Controls L1 S1 All scaffolders must be trained and tested with scaffolding course in training center of DVN’s Training and trained person entering working at height only All scaffolders must be had scaffolding certificate from the third party And qualified by DVN EHS scaffold supervisor All scaffolders who is working at height shall be inducted and got certificate from MOLISA ( Circular 44) 2 21 |30 Rev.B Resi dual Rate (RR N) Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 All workers must be equipped with Safety helmet & strap chin, safety google, fall arrestor device, clothing uniform with yellow helmet and sticker " Scaffolder" All employees shall follow manual handling methods permanent injury for worker Noncomplia nce of DVN’ EHS Procedu res and permit to work Ensure all are wearing necessary PPEs Ensure the dismantling is done only by the following the dismantling procedure Dismantling of scaffolding is not allowed during head wind Adequate supervision shall be available at site during dismantling Ensure a valid P.T.W “prior to the commencement of the any work at site and Permit to be made available at the work site during all the activities” Confined space entry permit shall be obtained from area authority prior to start confined space works Gas testing to be performed prior." if scaffolding installation inside confined space" 4 16 ( Scaffolding PTW applied from 10m and over and it was approved by DVN’s EHS) 2 2 2 Job specific T.R.A to be made available at the site & control measures to be communicated to all personnel involved in the job through Tool Box Talk Meeting Job specific Tool Box Talk to be filled up prior to the commencement of work and to be kept in the site permanent injury for worker Major injury Fall of material /Trips & fall, stuck by personal - Injury to Sharp edged tools Cut injury/ Avoid gaps in between planks 12 Ensure that overhang is not more than 50 mm at the edges Provide toe boards to avoid fall of materials and guard rails to prevent the fall of persons Ensure all hand tools are inspected and approved Ensure trained and experienced employees are assigned to the job 22 |30 Rev.B Method Statement for Water Filling Test of Storage Tank Pinch Point/D efected hand tools/De fected / Injury/i mproper ly erected scaffoldi ng, partial/c ollapse scaffoldi ng, damage material s or structure , unqualif ied personal injury or death, unautho rized Job / Task Welding work People at Risk Electric shock Cause of Adverse Effect Damage d/ Defectiv e Equipm ent NS2-DD09-P0ZEN-740013 Ensure all hand tools are checked for their good working condition prior to the start of the job by operators or users Ensure no defected/ handmade/modified tools are available at site All portable hand tool shall be tie by layard for falling protection Scaffolding inspector shall visually inspect the scaffolding is erected as per procedure by qualified personnel's supervision Ensure the materials used for the construction are graded During inspecting the higher level platforms Inspector shall maintain 100% tie-off 15 All scaffolding shall be inspected after inclement weather or after seven days or 3 L1 S1 Resi dual Rate (RR N) 4 2 if work has been carried out temporary on the structure by a certified scaffolding inspector whose findings shall be recorded on the scaffolding tag and in a register kept by him No person other than a scaffolder and/or his helper may be on a L S1 Risk Rate (RF N) 16 Mitigating Controls Workers are to check the condition of all equipment for defects prior to use: cables & connections, earth clamps, inspection tag and electrode holder Proper earthing and connection of welding machines and generators Proper PPE to be worn at all times Cutting and Welding works Fire/ explosion Damage d/ Defectiv e Equipm ent 12 Flashback arrestor and gauge should be installed prior to use cutting by Gas cylinders Always wear appropriate PPE (welding mask, welding gloves, welding jacket, Arpon) 23 |30 Rev.B Method Statement for Water Filling Test of Storage Tank Electric shock 4 16 NS2-DD09-P0ZEN-740013 Workers are to check the condition of all equipment for defects prior to use Check all electric tools prior to use by competent person and color tagged Check panels and earthing lines 4 6 4 No working on wet surface Flying object Damage d/ Defectiv e Equipm ent 15 All guards & safety features are to be operable Ensure that right disc are used for a certain job, cutting disc for cutting and grinding disc for grinding Ensure that the RPM of disc is higher than the RPM of the grinder Do not use damaged or wet disc Fall Work at height without proper working platform 4 16 Falling object Improp er storage material / tools 4 16 Work at height or ladder Using proper PPE as face mask protection Ensure that installation of proper working platform such as scaffolding with highest standard The lifeline shall be a minimum of 12 millimeter (½ - inch) wire rope Or it shall have a design capacity of 22 kilo-Newton Safety nets shall be provided when workplaces are more than 7.5 meter above the ground Safety harness must be worn before work and lanyard must be connected with proper anchor point 5-minute safety training before work Put the material in secure container Tie the tools to your safety belts or harness with rope having enough length to reach the working point connection Prevent unauthorized entry the area can be had falling object by securing area with barricade and signage Installation of safety net for prevent falling object if needed Ensure that wearing the proper PPE 24 |30 Rev.B Method Statement for Water Filling Test of Storage Tank Job / Task Confine space entry work People at Risk suffocation, Presence of residual harmful fume, dust, smoke Cause of Adverse Effect Failure to properly ventilate L S1 NS2-DD09-P0ZEN-740013 Risk Rate (RF N) Mitigating Controls L1 S1 Resi dual Rate (RR N) 15 Provide the adequate ventilation: Use mechanical air movers (in/out) for ventilation Check the oxygen level prior to entry on confined space Ventilation and extraction should be performed at least (30) minute before the entrants are allowed to go inside the CS Ensure atmosphere is safe by having oxygen concentration between 19.5% & 23.5% and should be monitored and maintained Workers should undergo a mandatory Confined Space training before allowing to enter the CS Gas free test to be conducted by a competent person before and during the work confirm the level of toxic substances does not exceed the permissible exposure limit The confined space shall be monitor continuously using at least no of in Gas monitor Ensure the in gas meter is having a valid calibration cert ( All workers shall be brief everyday about hazards of confined spaces and its control measures before commencing of work- all works shall be stopped and all workers shall evacuate immediately from the gas monitor and inform the person in charge people team or people 1team work and have to sign on the paper when out the entrance and exit times (You should check the time when you wear an oxygen mask, work the work up to the given time, and end the shift and work.) 2 25 |30 Rev.B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 Following procedures and actions are to be followed in a case a victim is to be rescued from an enclosed space: Emergency Job / Task Grating installation Failure to commun ication device or walkies talkies People at Risk Cause of Adverse Effect falling hazard, falling from height May be falling objects , workers may falling from hole opening cause fatal Raise the alarm and inform Master Obtain necessary assistance and equipment including medical support Lifelines, breathing apparatus, resuscitation equipment and other items of rescue equipment are ready for use First aid squad fully equipped near to the scene Communication link established Use approved VHF/UHF radios The officer in charge of the rescue must remain outside the space, where he can exercise the most effective control Before entry, officer in charge must inform in briefly the squads about the peculiarities of the relevant space (if possible consult relevant plan) During rescue operation adequate ventilation shall be provided continuously Any case in emergency contact to DVN’EHS Department and LILMA HSSE Department with Telephone number: 023.7386.2595 16 L S1 Risk Rate (RF N) 4 16 Mitigating Controls All workers must be training and have to take part in TBM and compliance with PTW ( grating and handrail removal permit) A piece of grating or handrail will never be removed or left without: Pre – Installing a hard barricade, guardrail, or equivalent, which will entirely encompass the opening or Properly covering the opening 26 |30 Rev.B 4 L1 S1 Resi dual Rate (RR N) Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 If a floor hole cover ( s) it used, it must be constructed to adequately support without failure, at least twice the weight of any person ( s) and Or equipment to which the cover may be subjected Be cleated or secured by means of wire tie downs, clips, or other equivalent fastening method -visibly identify the hazard on the cover ( DANGER – HOLE COVER- DO NOT REMOVE) - All signal boards, tags, hard barricade must be available injury, serious injury * Prepare Job Safety Analysis and Safety Checklist when RRN is ≥6 ** Prepare Safety Verification Checklist when RFN is ≥6 Frequency 1: unlikely/improbable 2:Remote 3:Quite possible/Occasional 4:Likely/Probable 5:Very likely/Frequent L1 : Likelihood as is L2 : Likelihood with mitigating controls in place Severity 1.Negligible 2.Slight 3.Moderate 4.Critical/High 5.Catastrophic/Very high S1 : Severity as i S2 : Severity with mitigating controls in place Risk Factor Number ( RFN) 1-2 Trivial/Acceptable 3.5: Tolerable 6.-9: Moderate/Acceptable with review 10-15 Substantial Prepared by Mr Le Thanh Hai Position: LLM HSSE Manager Signature: Date: 10th April,2019 Residual Risk number ( RRN) 1-2 Trivial/Acceptable 3-5 Tolerable 6-9: Moderate/Acceptable with review 10-15: Substantial 16-25:Intolerable/Unacceptable Approved by: Position Signature Date: 27 |30 Rev.B Method Statement for Storage Tank Installation NS2-DD09-P0ZEN-740013 8.2 JSA (Job Safety Analysis) JOB SAFETY ANALYSIS NGHI SON BOT THERMAL POWER PLANT PROJECT ( Developing a habit of analyzing method to identify hazards & unsafe practices than developing solutions that control, minimize or eliminating hazards) Task: Prepared by Mr Le Thanh Hai Original date: Reviewed by Mr Revised by: Approved by Mr Revised date: PPE required (Tick as applicable – state > category/specific type) Safety Gloves: Face shield Barricade googles: needed Safety Long sleeves Hearing MSDS harness protection need/Review Revision: A Lock out: Tack out: Group fault interrupter Dust Mask: Others Other safety equipment required: Remark: LIST OF ALL JOB STEPS Transportation of Equipment & Delivery of Materials LIST OF ALL KNOWN HAZARDS Crash/Traffic accident Falling materials and equipment from trailer or truck HOW TO ELIMINATE HAZARDS All Truck and trailer operators must be got EHS conduction from DNV EHS training center and had certificate following Vietnam Molisa regulations Check The access road before passing area 3.Designate a signalman when moving equipment Lashings (such as webbing, chains, cables or clamps) should be in serviceable condition and be checked for damage at regular intervals to ensure their tension has not been lost Use sleeves and/or corner protectors to prevent damage to both the load and the lashing or sheet if it passes over a sharp edge or corner Ropes and buckle straps suspended from a roof rail and/or the curtains of a standard curtain-sided vehicle are generally not suitable for securing a load Heavy lifting work - loading and unloading Potential fatality and serious injury due to lifting work Fatally/Serious injury to workers Regular inspection and maintenance shall be carried out and a register kept by a qualitied person, for the lifting tackle under DVN EHS control This equipment checking for deformation, cracks or any faults includes: Wire slings, Hooks, Shackles, swivels, spreader bars, Shear –Legs or similar equipment Ground bearing to be tested and endorsed by competent person.( Crane operators and lifting supervisors ensure safe condition positioning of crane) Steel plates to be laid for the positioning of crane, if necessary Lifting supervisor to maintain visibility and supervision during lifting work 3.Adhere to approved lifting plan Ensure a valid permit to work 5.All necessary check list to be update 6.Wire slings must be properly stored Soft/un event ground may cause crane topple Potential fatality to workers property damage Over loading of crane’s SWL may cause crane toppled Damaged sling –unsecured loose materials High potential fall incident and damage to property 26 |30 Rev.B Method Statement for Storage Tank Installation NS2-DD09-P0ZEN-740013 Rigging improper method, high potential fatality due to falling object Grating installation and removal High potential falling object due to fall or material drop down 2.Pinch point, serious injury hand off the ground without casing kinking 7.Wire slings must be cleaned and inspected before and after using 8The issuing and control of slings shall be performed by a qualified person 9.Wire slings and web slings shall be uniquely numbered and a register kept of all 10.Besides the regular inspection following their use, Wire slings and web sling must be inspected on monthly basically the finding entered on the record sheet Worn slings must be cut into two and properly disposed of: Not allow: Using a wire sling over sharp corner without padding 2.Force the sling into position 3.Overload the slings 4.Use a damaged slings, or one that is worn 5.Drag a sling from under the load 6.Allow loads to pass over a slog laying on the ground ( Tagline to be used at all time during lifting works) Adhere to the approved lifting plan) Lifting supervisor to ensure the proper center of gravity (Lifting supervisor brief the method statement in TBM) Suspend the load 300mm above ground and confirm stability 1.Ensure a valid permit to work is in placed before work commencement 2.lifting plan placed before lifting 3.Only appreciated and competent rigger to carry out rigging 4.inspect lifting gear prior to use Any person employed on site as a rigger shall be trained and experienced in this capacity 2riggers working on scaffolding and /or steel structure must not wear soft shoes unless they approved steel capped toe safety type Protective gloves must be worn when handling wire ropes All workers must be trained by DVN EHS and comply with safety regulations with working at height 1.1 comply with P.T.W ( Grating and handrail removal permit) 1.2 Before removal grating on the floor of Boiler must be identified grating’s location exactly and install hard barricade for isolated and prevent worker access install warning signal board “ Warning opening hole – keep away” 1.3.Workers in this task have to using the hooks for falling protection hanging grating during the time remove or installation 1.4 All portable hand tool machine or tools as scratch spanner, or portable drilling machine must be secure with 27 |30 Rev.B Method Statement for Storage Tank Installation Equipment and material preparation for temporary facilities NS2-DD09-P0ZEN-740013 1.Collision between overturning may cause permanent injury, collapsed machine, death or 2.Uneccessary movements of equipment a person that causes injury 3.Equipment oil leak during operation Working and operation during night time 1.working operation of the equipment may cause serious injury to personnel due to: 2.Generator leakage) (Diesel equipment oil 3.Chemical storage Welding and cutting work Electrical shock, fire, burn to body and injury to eye may cause death or permanent injury layards for falling protection Ergonomic and manual handling must be trained and TBM before working in this task 1.Alway keep the site clear of any obstruction 1.2.Toolbox talks on daily basic 1.3Adequate warning signal board 1.4 Checklist on all vehicle must be provide every day 1.5 Siren for warning before lifting 2.Designate a signalman who wear the hi –vest suite to control the work 2.1 Heavy machinery should have backward movement warning light beacon 2.2 Equipment used to clear the site should be controlled and sorted by bank man 2.3 Provide safe entrance and exit way for the workers going to the area 2.4 All vehicles entering on the site must turn on their headlights day and nighttime Daily check of the equipment prior to work 1.Must provide sufficient lighting on the entire working area 1.2 All equipment must be ensure all lights are operation 1.3Supervisor must always be present for entire working 1.4 All workers must be wearing proper PPE ( Hi –Vest) 1.5First aid box should be prepared for the first aid in case injury 1.6.Temporary electrical system must be used and connect 03 core and separated distribution panel ( with ELCB with electrical leakage 30ma) and avoid from any water effect 1.7 provide safe access way and exit access road for the workforces passing 1.8All kinds of electrical cable must be hanged over ground at least 2m and must be industrial socket and plugs 2.Daily check of the equipment prior to start work 2.1 Regular inspection and monitoring of the equipment prior to use 2.2 Provide secondary containment protection under the equipment to prevent contamination soil by oil spillage Diezel chemical shell be stored in secondary containment and MSDS must be showed and communicated to all workers who concerned All hazardous waste must be collected and keep inside the hazardous waste disposal bin and handover to DVN EHS to treatment by the Nghi son Environment company following Vietnam environment regulations All workers must be trained with special hot work training from DVN EHS training center and also equipped with 28 |30 Rev.B Method Statement for Storage Tank Installation NS2-DD09-P0ZEN-740013 Fire accident due to electrical wire aging during welding Working on scaffolding Potential incident and fatality and serious injury due to falling from height PPE as: Safety mask for face protection and face mask for welding or cutting, leather gloves Arpon Proper earthing and connection of welding machines and generators 2.Flash bask arrestor and Gas flow regulator should be installed to Gas cylinder and cutting gears or cutting torch prior to using cutting 2.1.Must be used fire blanket to isolated welding area and used ask tray for prevent welding slags drop 2.2.fire watchman should be available at welding area 2.3 Portable fire fighting extinguisher must be available at workplace 2.3 All flammable and combustion materials should be moved way from welding or gas cutting area at least from 5m to 10m depend on actual location at workplace and ensure method for isolated with fire hazards 1.Make sure all workers who working at height must be trained safety induction by DVN EHS training and also must be got safety certificated for Cir: 44 following MOLISA and DOLISA Vietnam regulations 1.2 Must be sure all workers must be worn safety harness and used 100% tie off all the time when they are working at height 1.3 Scaffolding system must be install and dismantling by competent persons and all scaffolders must be got qualified and trained by DVN EHS department 1.4 Scaffolding have to reach up with DVN EHS standards ( Supervisors and EHS supervisors must be inducted and training to all workers who is working at height) 1.5 All scaffolding system must be inspected by scaffolding supervisor and inspector and apply with scaffolding tags ( Green – Yellow – Red) All workers must be followed and comply with Safety rules and principles as: Climb on the ladder must be complied with three points principle 2.1.Do not face away from the ladder while carrying out work from the ladder 2.2 Do not stand close than 900mm to the top of ladder 3.Lifeline must be designed allowable carrying load capacity 3.2 Using fall arrestor device( Rope grab) using for vertical lifeline applicated on ladders (Nilon rope diameter with 16) 3.3 Lifeline system must be done before working Horizontal lifeline must be used wire rope Min 10 Max 12 Ladders must be inspected frequently before working and those which have developed defects must be withdraw from service for repair or destruction and tagged marked as ( Dangerous not use) 29 |30 Rev.B Method Statement for Storage Tank Installation NS2-DD09-P0ZEN-740013 4.2 Damaged ladders or missing rungs, broken with side rails or other faulty equipment must be not used Improvised repair are not allowed Confined space entry work Death due concentration Or toxic gas to reduced oxygen Rescue in emergency case Fatal or death for worker if not in time 1.All workers who working inside confined space must be attend and safety training at DVN EHS training center and must be carry out before working Complied with PTW following DVN EHS procedures before entering confined space must be using ventilation air force for gas monitoring and using multi-gas device in for checking ( Apply with oxygen form 19.5% to 23.5%) and checking every 02 hours one time ( but no limited for checking atmosphere inside confined space following DVN EHS requested or instructed on site) Establish for communication system from inside and outside of confined space Do not working alone and at least working inside confined space 03 persons Establish a tripod and pulley for rescue in case emergency When workers working inside must be used safety harness for rescue reasons and ERT member must be available during the time workers working inside and comply with Emergency procedure of DVN EHS Any case in emergency contact to DVN’EHS Department and LILMA HSSE Department with Telephone number: 0974.39.33.99 or DVN EHS 023.7386.2595 Following procedures and actions are to be followed in a case a victim is to be rescued from an enclosed space: Raise the alarm and inform Master Obtain necessary assistance and equipment including medical support Lifelines, breathing apparatus, resuscitation equipment and other items of rescue equipment are ready for use First aid squad fully equipped near to the scene Communication link established Use approved VHF/UHF radios The officer in charge of the rescue must remain outside the space, where he can exercise the most effective control Before entry, officer in charge must inform in briefly the squads about the peculiarities of the relevant space (if possible consult relevant plan) During rescue operation adequate ventilation shall be provided continuously 30 |30 Rev.B ... water storage tank b Demi water storage tanks c Plant & Fire Water Storage Tanks d Condensate water storage tanks e Light diesel oil storage tanks B f Absorber towers for FGD system g Makeup water. .. water tank for FGD system h Limestone storage tanks for FGD system i Emergency storage tank for FGD system j Gypsum slurry storage tank for FGD system k Filtrate tank for FGD system l Any Tank. .. applied in this MS |30 Rev.B Method Statement for Water Filling Test of Storage Tank NS2-DD09-P0ZEN-740013 GENERAL This method statement is applied for water filling test of Field tank only If there