METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK

METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK_Method Statements for Method Statements For General Concrete Work Works and to details out the steps to be taken in meeting the technical requirements of Van Phong 1 thermal power plant project

Comment Response Sheet (CRS) Project Title Van Phong BOT Thermal Power Plant Project Document Title METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK Document Type For Approval Document No VP1-0-L4-A-UYX-20023 Returned Status AC Prepared by CRS No VP1-0-L4-A-UYX-20023-A-CRS CRS Issued Date 16/06/2020 Engineer No Section/ Page 3 Owner’s Comment Response to Comment 16/06/2020 Please clearly state the extent this system includes - potable water supply, sanitary drainage, waste drainage, chemical drainage, etc drainage as applicable [Rev.B] 16/06/2020 Provide reference documents of piping material specification [Rev.B] Review Date Status O/C * 16/06/2020 O This method statement includes - potable water supply, sanitary drainage, waste drainage, chemical drainage, etc This MS is related with procedure of underground plumbing work, and approval for plumbing material is being submitted separately MS KIM Remarks C 16/06/2020 O reference drawing Complete number to close out this comment - uPVC: VP1-0-L4-Q-GEN-10040 - cPVC: VP1-0-L4-Q-GEN-10049 - Carbon steel: VP1-0-L4-Q-GEN-10061 - Stainless steel: To be submitted Page of Comment Response Sheet (CRS) 3 16/06/2020 Lists all drawing number under reference drawing list for clarity of applicability of this document [Rev.B] 16/06/2020 Since plumbing drawings are submitted for each building, it is difficult to indicate the drawing numbers of all buildings Hence, turbine building and CCB drawing for underground plumbing work were issued as mentioned below; O Noted Closed - VP1-C-L4-C-UMA-29601, D (Turbine) - VP1-0-L4-A-UCB-02401~4, B (CCB) 3 16/06/2020 Only plastics pipes? No SS, etc underground pipes for plumbing system? Please clarify [Rev.B] 16/06/2020 Typical drawings, P&ID, isometric drawings, and/ or schematic drawings should be given as reference [Rev.B] 16/06/2020 O C The table has been updated 16/06/2020 O C 16/06/2020 O C 16/06/2020 O Please refer to the submitted plumbing drawings - VP1-C-L4-C-UMA-29601, D (Turbine) - VP1-0-L4-A-UCB-02401~4, B (CCB) 16/06/2020 Relevant project specification to be list as reference [Rev.B] - Part III-2 Exhibit B1 Appendix G - Civil Structural Technical - Part III-2 Exhibit B1 Tech Spec Section 16/06/2020 Who? CTCI or Doosan or VPCL? Please review and clarify [Rev.B] All materials required should be approved by the VPCL (and Poyry) who is Owner of Van phong-1 project C Page of Comment Response Sheet (CRS) 10 11 12 13 14 4 5 5 16/06/2020 Consider material is PVC pipe, recommend to apply sand bedding and backfill around the pipe to avoid pipe damage [Rev.B] 16/06/2020 Provide typical of trench section, that shown typical dimension, and depth of trench, bedding, embedment, and cover according to designed compressed load on top of pipe [Rev.B] 16/06/2020 Why raw water is allow to used? It is possible to contaminate in potable water? [Rev.B] 16/06/2020 ITP specify hrs Which is correct? [Rev.B] 16/06/2020 Is this leak test done before or after back-fill? Describe more to repair method in this document [Rev.B] 16/06/2020 Indicate test pressure [Rev.B] 16/06/2020 Provide with project document numbering This document should be conformed to design standards/ local regulation [Rev.B] 16/06/2020 OClosed 16/06/2020 O C 16/06/2020 CO 16/06/2020 C O 16/06/2020 O C Sand bedding and manual backfill around the pipe to be applied Typical section to be updated as per comment But It will be changed depending on pipe size or site condition Test medium shall be used by potable water only It is revised to 02 hrs After the leak test done shall be backfill 16/06/2020 Design requirement for test pressure of Portable water supply line in building is 4bar This pressure test is to check whether the pipe is leaked, and is conducted according to the design required pressure and code 16/06/2020 Hydrostatic test pressure shall be O to ASME B31.1 Please complied recheck and confirm ClarifyOtest pressure according to design pressure Page of Comment Response Sheet (CRS) 15 16 17 18 19 7 10 16/06/2020 Calibration certificated should be attached with the test record [Rev.B] 16/06/2020 Describe more about method to remove foreign matter inside of piping [Rev.B] 16/06/2020 Gravity-slope line shall be lay on sleeper and fixed to ground at design level [Rev.B] 16/06/2020 Test pressure shall be 1.5 design pressure according to 137.4.5 ASME B31.1 [Rev.B] 16/06/2020 ITP document L4-A-UYX-20024 Rev A doesn't match with this document Please review and correct these documents/ any orher EPC document (if applicable) to avoid any possible mismatch Additional Notes (if any) * O - Open, C – Closed 16/06/2020 O C 16/06/2020 O C Calibration certificated will be attached with the test record Revised as per comment 16/06/2020 Closed O Revised as per comment 16/06/2020 Closed O Revised as per comment [Rev.B] 16/06/2020 O MS and ITP have revised and submitted C Page of AP APPROVED Approved AC APPROVED WITH COMMENT Contractor to revise the correction and resubmit NA NOT APPROVED Revise the correction and resubmit before proceeding REVIEWED RE REVIEWED WITH COMMENT RC For Approval Information acknowledged with no comment Information acknowledged with comments Note: Approval or comment does not relieve the Contractor of all obligations covered under contract Discipline: Date: Mechanical / Architectural 14 Jul 20 B 02-Jul-2020 For Approval J.H CHOI K.S KIM M.S KIM A 04-Jun-2020 For Approval J.H CHOI K.S KIM M.S KIM REV DATE DESCRIPTION Approved Checked Prepared OWNER VAN PHONG POWER COMPANY LIMITED PROJECT Van Phong BOT Thermal Power Plant Project Status □Approved □Approved with Comment □Not Approved □Reviewed OWNER’S ENGINEER Pöyry Switzerland Ltd EPC CONTRACTORS IHI–TESSC–CTCI–DHI CONSORTIUM PROJECT DOCUMENT No REV VP1-0-L4-A-UYX-20023 B DOCUMENT TITLE METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK EPC EPC DOCUMENT No VP1-0-L4-A-UYX-20023 Doosan Heavy Industries and Construction REV B Page | METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK TABLE OF CONTENTS PURPOSE MACHINERY & EQUIPMENT 3 RESPONSIBILITIES 4 MATERIALS .4 PROCEDURE & SEQUENCE WORK METHOD/PROCEDURE 7 QUALITY CONTROL 11 ENVIRONMENT, HEALTH AND SAFETY (EHS) 11 Page | METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK 1.0 PURPOSE The purpose of this Method Statement is to describe the methodology involved on the installation of B underground plumbing work such as potable water supply, sanitary drainage, waste drainage, chemical drainage, oily drainage as per plumbing drawing limited in building the steps to be taken in meeting the technical standards and EHS requirements of Van Phong BOT Thermal Power Plant Plant Project/Project: Van Phong BOT Thermal Power Plant Project Company/Owner: Van Phong Power Company Limited (VPCL) Contractor: EPC Reference document: - TCVN 4519:1988 Indoor water supply and drainage systems - Codes for construction, check and acceptance - Project technical requirement - Approval civil construction drawing Reference drawing list for clarity of applicability of this document: B + VP1-C-L4-C-UMA-29601, D (Turbine) + VP1-0-L4-A-UCB-02401~4, B (CCB) 2.0 MACHINERY & EQUIPMENT No B Description Remark Clamping tool & hand tools : measuring and leveling tools, glue roller, knives, scissors, screw driver, plumbs Required machine for joint: Cutting machine, welding machine, Sander, (if required as per manufacture recommend) Consumables : Pipes and fittings, duct tape Hydrostatic Test equipment Portable water line only Page | METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK 3.0 RESPONSIBILITIES It is overall responsibility of Project Manager to organize resources prior to perform construction activities as per project specification in compliance with the quality, schedule & safety requirements EHS Manager will ensure in coordination with Site Engineer that all measure/construction taken shall be maintained till completion of job It is the responsibility of Construction Manager/Site Engineer that construction activities are executed according to the relevant project specification in compliance with the quality, schedule & safety requirements EPC will ensure that all works are performed safely The relevant EPC Supervisor will ensure that the work is carried out in accordance with this method statement and project specification The QC Inspector will ensure that the work is executed according to the requirements of quality dossier are fulfilled 4.0 MATERIAL B Please change to "or VPCL's representative" All materials required shall be approved by the VPCL (and Poyry) who is Owner of Van Phong project All materials required shall be true to size, without cracks, chips, splits, or other defects which may impair their strength or durability Material should be taken receiving inspection with all their certificate from factory approved 5.0 PROCEDURE AND SEQUENCE 5.1 The Contractor shall furnish all labor, tools and materials necessary for the complete installation of the plumbing system which includes pipe lines inside(including under) Buildings 5.2 Underground Soil, Waste, Drain and Vent Pipe and Fittings - Underground soil, waste, drain and vent pipe and fittings shall be uPVC; CPVC pipe 5.3 Under slab sanitary sewer pipes from fixtures to the building main shall be uPVC pipe Fittings shall be uPVC and solvent weld shall comply ASTM D2564 solvent cement (or product of manufacture) 5.4 Potable water pipe and fittings shall be stainless steel complied with ASTM A312-TP304 5.5 All excavation shall be restored to its required level The bottom of trench shall be dry prior to B installation After installation, all pipe ends shall be capped to prevent egress of unsuitable materials Sand bedding and manual backfill around the pipe to be applied to avoid pipe damage Page | METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK 5.6 The trench bottom shall be continuous, smooth, free of rocks and in accordance to the line and grade shown in the drawing B Typical section of trench shall be changed depending on pipe size or site condition as below: Typical section of installation pipe 5.7 Testing: Service Test for Gravity-Slope line • Gravity (Sanitary drain, Sewage drain, and chemical drain, Oily drain) drainage system shall be subjected to service test • Service Test Inspection shall be conducted after complete backfilling has been done for installed gravity-slope drainage line • Service test shall be done prior to concrete works to ensure no leakage on installed gravity-slope underground piping cause by excavation damage or by any other causes B • Water level in pipe shall be checked for confirmation of water leakage during test 2hr • After the leak test done shall be backfilled • Test medium shall be used by potable water or raw water Hydrostatic test for Portable water line • Pressure (Portable water line, Water supply, Hot water line) system shall be subjected to hydrostatic test in accordance with Doosan Quality and Safety Management Plan B • Test medium shall be used by potable water only Page | METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK • Lines whose joints have not been backfilled for underground piping or are above ground piping shall be tested to a period of hours while hours shall be maintained for lines whose joints have been backfilled or concealed B Is it potable water? • Test Limits, pressure, test medium and safety requirements shall be identified Design requirement for test pressure of Portable water supply line in building is 4bar • Temporary supports shall be installed wherever required Regarding VP1-0-L3-R-GKB-22001 rev D, potable water pumps head is 55.97 m Please ensure that test pressure is sufficient and complied to ASME B31.1 • All joints shall be left exposed for visual inspection during test • Underground piping shall be partially backfilled with all joints exposed to serve as a pipe support and prevent floatation • Work Permit is obtained for all pressure testing and associated work within restricted areas, Work Permit System • The test areas shall be marked and warning signs shall be posted to alert approaching personnel • A blow down valve of adequate pressure rating is installed to depressurize the system • The relief valve shall be located in the test manifold near the test pump • A pressure gauge shall be located at the test manifold and one pressure gauge on the furthest route of B the piping network being tested Calibration certificated will be attached with the test record • Vents shall be provided at all high points in the system being tested • A blow down valve or bleed valve shall be readily accessible in case immediate depressurization is required Hydro test Crew • Hydrostatic Testing shall be done by trained personnel in the proper handling and usage of applicable tools and equipment prior to start of hydrostatic Testing • Personnel conducting the hydrostatic testing shall be fully aware of the general requirements of safe pressure testing of pipelines Pressurization • No Thermoplastic Piping shall be pressurized until it has cured for 24 hours at a surface temperature of 10°C or higher • The test pump & test manifold shall be placed on a firm ground away from the piping being tested • The test manifold shall be supported firmly to avoid vibration during pressurization • All in line valves are in open position Page | METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK • Filling and pressurization is injected at the test manifold upstream of check valves and at the lowest point of the system being tested to minimize entrapped air • Water filling into the system shall be direct from a water truck or form a ground level water tank with pump • Remove air during filling of water by opening the vents installed at high points and shall be closed when air has been released from the system • After venting, valves used for venting are placed at partial open position and plugged • Vents and drains used only for the pressure test shall be plugged or seal welded • To pressurize the system, motorized or manual test pumps shall be used depending on the size of the system being tested • The system shall be pressurized slowly • Preliminary check for leaks at 50% of the test pressure shall be done • The pressure is increased in steps no greater than one-fifth of the test pressure after the preliminary check at 50% test pressure Each step in pressurization is held at minimum of 10 minutes • After the test pressure is reached (before inspection), the isolation valve between the test manifold & the piping system under pressure test is closed and the test pump disconnected • No repair of leaking joints until the system has been de-pressurized Depressurization and Draining of Test Medium • After pressure testing has been successfully completed and approved, the piping system being tested shall be depressurized and drained • Release of pressure and draining shall be done on the downstream side of check valves • All vents shall be opened before draining to facilitate drainage and to prevent formation of a vacuum • Water used for hydrostatic testing can be used for another test, to be used for water spray of trenches, to be used for water flooding of pipe sand covering or to a safe and approved discharge area • All temporary items installed for testing purposes shall be removed • All pipe ends shall be covered after draining the system to prevent entry of foreign materials into the system 6.0 WORKING METHOD/PROCEDURES B 6.1 Check the protection cover of both ends of the pipe and remove any dust that may remain in the piping with water and brush before installation Page | METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK 6.2 Adequately support vertical lines at their bases or by a suitable hanger place in horizontal line near riser or by a base fitting set on pedestal 6.3 Run piping in straight lines and square with the building Gravity-slope line shall be lay on the sand B bedding as shown clause 5.6 above and fixed to ground at design level Riser lines to be plumb Provide dielectric fittings for connecting dissimilar metals 6.4 Do not route piping over any electrical equipment where the possibility of damage exists Provide flanges and unions throughout piping system to facilitate the installation and removal of piping and equipment 6.5 Sewer lines shall not cross over water line In case inevitable, suitable measures at the crossing shall be taken 6.6 Valves shall be installed in horizontal lines with stems either horizontal or vertical Isolation valves shall be installed at any other points indicated or required for draining, isolation, or sectionalizing purposes as per Drawings Valves shall be installed such that maintenance access is maintained for all parts requiring service Control valves shall be provided in water pipes to provide complete regulation of plumbing fixtures and equipment 6.7 Provisions must be included for servicing and removal of equipment without dismantling piping works Place sanitary sewer pipe, drain pipe and chemical pipe, oily pipe at elevation and slopes as per drawing 6.8 Preparation for the first fix shall commenced immediately upon completion of civil works 6.9 Marking for the pipe route considering the other agencies shall be done with due consideration for slopes and tapping points as per the drawings 6.10 After the chasing works, the pipes shall be concealed 6.11 The process of installing pipelines shall be inspected by the stakeholders and ensured to follow the required procedures (There will be no leak if the installation process follows the right procedures) Visual leak check shall be carried-out after the installation The visual leak test result shall be provided in the ITP during inspection process The leak test shall be applied with drainage pipe line With pressure pipe line such as portable water line and hot water line will be applied to hydrostatic test Page | METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK Pressure test work flow chart: Preparation Filling and Venting Testing & Pressurizing Draining Preparation work - * Document The test section of the line has been installed in accordance with drawing The location marking of the test on the DWG All equipment / Instruments shall have a valid calibration certification and shall be recalibrated befor e due date, method statement shall be follow for calibration of Equipment/Instruments * Equipment - Pressure water pump Calibrated pressure gauges Blind flanges with bolts/nuts and temporary gaskets Valves and pipes for connection with gauges and the pump, safety valves Safety tapes, warning signs etc Consumables Hand tools Test water should be using potable fresh water (Design flow water) or equivalent Filling and Venting - Ensure suitable pumps are available for filling of the system and its pressurization The specification of pumps to be used shall be provided before testing Liquid testing medium will be filled from the lowest point in the system to minimize the risk of trapp ed air pockets Vent shall be open to remove all air during supply of the water Testing and Pressurizing - Test pressure gauge shall be fixed in the highest elevation of the pipe line, and pressure gauge shall b e have valid calibration certificate Hydro test for underground, the section pipe line to be tested should be partially backfilled including pipe to fitting joints to ensure a proper support Check point to be exposed for inspection d uring the test Page | METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK B - The hydrostatic test pressure test shall be 1.5 times the design pressure (according to 137.4.5 ASME B31.1) The increase of pressure won’t be higher than bar every 10 minutes for ND > 500 mm and bar ev ery minutes for ND < 500 mm Pressurizing - Initial Expansion Phase - Add make-up water as necessary to maintain maximum test pressure for h Test Phase - Reduce test pressure by 10 psi (1.45 kPa) and monitor pressure for h Do not increase pressure or add make-up water If leakage are found, the locations shall be marked, the pressure shall be gradually released, and the p iping shall be drained or vented Appropriate repair or replacement shall be made The affected pipin g shall be re-tested at the pressures originally specified for the test *Acceptance Criteria - If no visual leakage is observe and pressure during the test phase remains steady (within 5% of the te st phase pressure) for hour, the test is acceptable Draining - After successful completion of the test, the system shall be depressurized gradually and then drain co mpletely Pressure shall be released in a control manner and at a rate so as not to endanger personnel or damage equipment Testing diagram Arrangement tools drawing for hydro test Page | 10 METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK 6.12 Pipes shall be joint when the length of a pipe has been put into use, and in case in case that there are changes on the elevation and direction of the pipeline in accordance with the design, joint fittings shall be needed 6.13 Checking the slope of pipes following the design: Before installing pipes in the concrete structure or associated with other structures, the elevation (pipe bottom) shall be determined by the theodolite and supporting frames shall be reinforced by round steel For the pipelines on the ground, the elevation shall be determined by the theodolite and the land area is prepared following the design elevation, then pipes shall be directly installed on the prepared ground After the pipe installation, checking the slope again by the theodolite and tape measure 6.14 The bottom of pipe and back fill material shall not have any sharp edged material which may damage the pipes Hence generally, the bottom 100mm shall be filled with sand and also back filling shall be done with sand till 100mm above the pipe to ensure no damage to pipe and to consolidate properly without applying excessive loading We using sand backfilling materials for this work 7.0 QUALITY CONTROL The Site Inspection and Test Plan (ITP) for this work summarize various characteristics to be checked The concerned Site Engineer/Foreman will be responsible to ensure stage wise compliance for these operations and the Site QA/QC Engineer/Inspector will carry-out quality control checks and report the inspection results 8.0 ENVIRONMENT, HEALTH AND SAFETY (EHS) 8.1 Responsibilities and Instructions 8.1.1 EHS Officer shall ensure that all work is undertaken in accordance with the specified work scope 8.1.2 Safety training should be conducted to all personnel assigned at site prior to commence any work 8.1.3 All personnel should know the locations of fire extinguishers, communications, manual alarms & ESD points 8.1.4 All personnel should be aware of assembly points, escape routes, emergency contact numbers 8.1.5 Personal Protective Equipment (PPE) shall be worn at all times 8.1.6 Good housekeeping shall be observed in work areas 8.1.7 Construction wastes shall be segregated and disposed to an approved dump yard area 8.1.8 Keep non-essential workers clear of machinery whilst it is in operation Page | 11 METHOD STATEMENT FOR UNDERGROUND PLUMBING WORK 8.1.9 Proper inspection of all equipment prior to use to avoid leakage and equipment failure 8.1.10 Permit to work shall be obtained appropriately for the type of work and location 8.1.11 All vehicles must comply to observed speed limit of 10km/h on site 8.1.12 Excavation and delivery of materials are prohibited during heavy rains 8.1.13 Adequate lighting equipment when working night time 8.1.14 Ensure all workers and equipment working overtime are properly accounted and obtained Regular working time is from 7:00am ~ 5:00pm 8.1.15 Periodic refresher trainings, tool box talk and audit shall be conducted 8.2 Safety (PPE) 8.2.1 Personal Protective Equipment (PPE) will be issued to all workers such as safety shoes, hard hat, working gloves, earplug, safety goggles, reflective vest and safety harness for workers who will be assigned in elevated places 1.6m and above 8.2.2 Wearing of the basic PPE will be enforced fully 8.2.3 All new recruits will undergo proper orientation and safety induction before they could have deployed at site for work Page | 12 JOB SAFETY ANALYSIS Van Phong BOT Thermal Power Plant Project 8.3 Job Safety Analysis: List of All Job Steps List of All Known Hazards How to Eliminate Hazards A.1a Be operated only by workers who have been authorized and given appropriate training A.1b Safe operating procedure should be established and used for all tools and equipment A.1c Daily checklist of equipment must be A.1 Injury by using hand tools and both manual and power driven A.Equipment/Too ls and Material Preparation provided prior to stat any work A.1d Every power driven tools should be provided with adequate means, immediately accessible and readily identifiable by operator, of stopping it quickly and preventing it from being started again inadvertently A.1e Every hand tools must be inspected every month and attached inspection tag A.2 Electric shock due to without ground external box and circuit breakers A.2a Provide adequate ground and circuit breakers A.2b Must use core codes electric wire and separate distribution panel (must pass arrangement of ELCB) and avoid any water affect A.2c All kind of electric cable must be hang over ground A.2d Must use industrial socket and plug A.2e Electric cabinet don't affect any water B.1a Undetermined periods the workers should get proper fresh air B During the Course of Piping Works B.1 Inhalation of piping works B.1b Clear drinking water to be taken to clear the Throat and blow nose to remove dust B.1c All necessary PPE to be provided Page | 13 JOB SAFETY ANALYSIS Van Phong BOT Thermal Power Plant Project List of All Job Steps List of All Known Hazards How to Eliminate Hazards B.2a Workers should be provided with proper interval whilst using cutting machine B.2b All necessary PPE to be provided B.2c Close supervision and monitoring to be done B.2 Cutting Machine B.2d Fire extinguisher equipment shall be sufficient to Extinguish all types of fire likely to be encountered B.2e All extinguishers shall be readily accessible, free from construction and their locations clearly marked by Adequate signs B.3 Eye contact B.3a Irrigate eye with plenty of water and seek Medical attention if symptoms persist B.3b All necessary PPE to be provided B.4a All LPG cylinders to be approved by Government Authority B.4 Fire B.4b Proper fire arrestor to be fixed with the cylinder B.4c Fire extinguisher equipment shall be sufficient to extinguish all types of fire likely to be encountered B.4d All extinguishers shall be readily accessible, free from construction and their locations clearly marked by Adequate signs B.4e Chemical shall be stored in secondary containment & MSDS requirement shall be communicated with all concerned C Installation of Pipe C.1 Injury could be caused whilst off loading & shifting the materials C.1a Material shall be properly off loaded and stacked at the location required C.2 Collapse of scaffolding due to overweight C.2a Use appropriate scaffold materials only Page | 14 JOB SAFETY ANALYSIS Van Phong BOT Thermal Power Plant Project List of All Job Steps List of All Known Hazards C.3 While application at higher elevations How to Eliminate Hazards C.3a Use safe working platform with toe boards C.3b No person will be allowed to work directly under whist this activity is on progress C.3c All necessary PPE to be provided C.4a Cordon off the area below C.4 Splashing of chemicals into the eyes whilst application C.5 Fire handling and storage of materials C.4b Wear proper PPE including eye protection C.5a Fire extinguisher equipment shall be sufficient to Extinguish all types of fire likely to be encountered C.5b All extinguishers shall be readily accessible, free from construction and their locations clearly marked by adequate signs C.5c Chemical shall be stored in secondary containment & MSDS requirement shall be communicated with all concerned D Working Operation During Night Time D.1 Working operation may cause injury to personnel due to poor visibility of the area D.1a Must provide sufficient lightings on the entire working area D.1b All equipments/tools must be fitted with appropriate safety device and ensure all lights are operational not obscured by dirt & mud D.1c Supervisor and safety personnel must always be present for the entire working operation D.1d All workers must be wearing reflective vest D.1e Must use and connect core codes electric wires with separate distribution panel (must pass arrangement of ECLB) Page | 15 JOB SAFETY ANALYSIS Van Phong BOT Thermal Power Plant Project List of All Job Steps List of All Known Hazards How to Eliminate Hazards D.2a Daily check of the equipments prior to start of work D.2 Generator (Diesel) equipment oil leakage during operation D.2b Regular check &monitoring of the equipment prior to use D.2c Provide secondary containment protection under the equipment to prevent contamination of soil by oil spillage D.3 Oil/chemical storage D.3a Diesel/chemical shall be stored in secondary containment & MSDS requirement shall be communicated with all concerned Page | 16