MS 009 01 ECSI method statement

EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION METHOD STATEMENT MS-009-01 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION PACKAGE D CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT GUIDANCE NOTES Where this page is over-stamped with the words “Controlled Copy” this means: a) Distribution is centralized - in this case of this document from the Quality Control Manager; b) Each copy is issued to a particular person or organization If the document is no longer required it should be returned to the relevant person; c) It is not to be photocopied either in whole or in part Additional copies are available on request; d) Copy holders will be automatically issued with any amendments Responsibility for incorporating such amendments rests with the copy holder EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION 24/10/0 REV NO ISSUE DATE PREPARED BY ENGINEER REVIEWED BY AREA MANAGER C L GASALATA MR V G KIM N REVIEWED BY QC MANAGER REVIEWED BY SITE MANAGER APPROVED BY ACTING PROJECT MANAGER L DE OCAMPO Y UCHIDA Y UCHIDA EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION TABLE OF CONTENTS GENERAL 1.1 PURPOSE 1.2 TERMS OF REFERENCE 1.3 REFERRED DRAWINGS SCOPE OF WORK METHODOLOGY 3.1 GENERAL 3.2 CARE OF WATER 3.3 FLOWCHART 3.4 PREPARATORY WORKS 11 3.5 EXCAVATION WORK AND TEMPORARY SHORING 15 3.6 PIPE AND BOX CULVERT INSTALLATION 20 3.7 CONSTRUCTION OF MANHOLES AND INLET PITS 23 3.8 CONSTRUCTION OF DIVERSION CHAMBERS 25 3.9 BACKFILLING 27 3.10 LEAKAGE TEST 28 3.11 REPAIR OF CONCRETE 28 SCHEDULE 29 ORGANISATION 29 5.1 ORGANISATION CHART 29 5.2 SUPPLIERS / SUB-CONTRACTORS 30 5.3 LIST OF MACHINERY / EQUIPMENT 30 5.4 CRANE CAPACITY 31 QUALITY CONTROL 31 6.1 INSPECTION AND TEST PLAN 31 6.2 NON-CONFORMANCE REPORT 32 Page of 33 EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION TABLE OF CONTENTS (CONT’D) SAFETY MANAGEMENT 32 ENVIRONMENTAL MANAGEMENT 33 APPENDICES: LOCATION MAP CRANE CAPACITY (FOR REFERENCE ONLY) INSPECTION AND TEST PLAN FOR REINFORCED CONCRETE PIPES INSPECTION AND TEST PLAN FOR REINFORCED CONCRETE BOX CULVERT INSPECTION AND TEST PLAN FOR SITE WORKS INSPECTION CHECKLIST(S) / FORM(S) SAFETY RISK ASSESSMENT ENVIRONMENTAL RISK ASSESSMENT Page of 33 EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT SHIMIZU CORPORATION MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) GENERAL This method statement describes the procedures for construction of the Existing Combined Sewer Improvement and Secondary Interceptor Sewer by open cut method including preparatory works, earthworks, pipe / box culvert installation and construction of the inlet pits / manholes / diversion chambers The Method Statements noted hereunder will be submitted under separate cover by the Contractor in compliance with the Specification and Conditions of Contract: • MS-009-02 Design of Temporary Shoring for Excavation (01) • MS-009-03 Design of Formwork (01) • MS-010-01 Method Statement for Road Reinstatement 1.1 Purpose The purpose of this documents are as noted hereunder: a) to construct additional sewers as part of the existing combined sewer improvement b) replacement of sewers as a part of the existing combined sewer improvement c) construction of secondary interceptor sewer 1.2 Terms of Reference The terms of the Contract hereunder noted are applicable to the contents of this document: a) Contract Documents, Specifications: Technical Specification Section “Preparatory Works”; b) Contract Documents, Specifications: Technical Specification Section “Earth Works”; c) Contract Documents, Specifications: Technical Specification Section “Concrete Works”; d) Contract Documents, Specifications: Technical Specification Section “Sewer Construction”; e) Contract Documents, Bill of Quantities, Bill No “Existing Combined Sewer Improvement”; f) Contract Documents, Bill of Quantities, Bill No “Secondary Interceptor Sewer”; 1.3 Referred Drawings Page of 33 EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION The following drawings are applicable to the contents of this document: a) Contractor’s Drawing No GE - T - 1xx “Existing Utility Survey / Protection” b) Contractor’s Drawing No.’s L#1 - P - 1xx “Plan and Profile of ECSI” c) Contractor’s Drawing No.’s L# - P - 2xx “Cross Section of ECSI” d) Contractor’s Drawing No.’s L# - P - 3xx “Plan and Profile of ISC” e) Contractor’s Drawing No.’s L# - P - 4xx “Cross Section of ISC” f) Contractor’s Drawing No.’s L# - P - 6xx “Structure of Inlet Pit / Manhole / DC” g) Contractor’s Drawing No.’s L# - P - 7xx “Reinforcement Arrangement of Inlet Pit / Manhole / DC” h) Contractor’s Drawing No.’s L# - T - 4xx “Shoring Section, Shoring Plan and Profile” i) Contractor’s Drawing No.’s L# - T - 5xx “Excavation Scheme and Traffic Control Plan for Main Works” SCOPE OF WORK This scope of works associated with the Existing Combined Sewer Improvement (Including Secondary Interceptor Sewer) are outlined in Tables 2.1, 2.2 and 2.3 hereunder and on page For a pictorial presentation of the works reference is also made to Appendix No hereto: Table 2.1 LINE NO STREET Dien Bien Phu St Nguyen Bieu St Combined Sewer Improvement SEWER LINE LENGTH 722.10 PIPE DIA (MM) 1,000 446.80 1,500 139.00 1,000 28.00 x 800 400.00 □ 2,000 x 2,000 MANHOLE (NO.) 24 CAST IN SITU CONCRETE (M3) 127 18 159 41 442 # - denotes variable depending upon the sewer line in question (No.’s ~ 6) Page of 33 EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION Table 2.1 Combined Sewer Improvement □ 2,500 x 2,000 □ 2,000 x 1,363.70 2,000 359.30 1,500 891.00 Le Hong Phong St An Duong Vuong Huynh Man Dat St An Duong Vuong St Su Van Hanh St 193.70 1,000 365.90 1,500 529.00 1,800 299.20 2,000 840.30 LINE NO STREET Mac Cuu St Chau Van Liem St Thuan Kieu St Le Dai Hanh St Thang St Ly Thuong Kiet St SEWER LINE LENGTH 15 □ 2,000 x 2,000 PIPE DIA (MM) 39 300 58 1,743 MANHOLE (NO.) 1,500 729 2,000 65 1,898 CAST IN SITU CONCRETE (M3) 589 □ 2,500 x 2,000 Total Length: 9,220.00 metres Table 2.2 Secondary Interceptor Sewer and Diversion Chamber LINE NO STREET Nguyen Bieu St Tran Binh Trong St Huynh Man Dat St SEWER LINE LENGTH 472.30 PIPE DIA (MM) MANHOLE (NO.) CAST IN SITU CONCRETE (M3) 105 600 11 325.80 900 92 181.00 800 78 Total Length: 979.10 metres Page of 33 EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION Table 2.3 LINE NO STREET Dien Bien Phu Nguyen Bieu St LINE NO Tran Binh Trong St Le Hong Phong St An Duong Vuong Huynh Man Dat St An Duong Vuong St STREET Mac Cuu St Chau Van Liem St Thuan Kieu St Le Dai Hanh St Thang St Ly Thuong Kiet Existing Manhole and Inlet Pit SEWER LINE LENGTH 75.00 PIPE DIA (MM) MANHOLE (NO.) CAST IN SITU CONCRETE (M3) 75 800 14 61.00 400 ~ 1,000 12 49 96.00 600 ~ 1,000 16 65 152.00 800 ~ 1,200 22 118 94.00 800 ~ 1,200 27 144 SEWER LINE LENGTH PIPE DIA (MM) 86.00 600 MANHOLE (NO.) 15 CAST IN SITU CONCRETE (M3) 47 METHODOLOGY 3.1 General • Work Front - Lines and Works will commence at Line An Duong Vuong Street and proceed along Le Hong Phong Street upto Manhole ref: M10 Thereafter the work team will re-locate to Line to complete this line prior to re-mobilising to Line 4, Le Hong Phong Street, to complete the works from Manhole ref: M10 to M01 • Work Front - Lines and Works will commence at Diversion Chamber No 16 and proceed along Tran Binh Trong Street upto the completion of the line at Manhole ref: Line - M01 Thereafter the work team will re-locate Page of 33 EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION to Line to complete the works at Nguyen Bieu Street commencing from Diversion Chamber No 15 The Secondary Interceptor Sewer works located along lines and will be executed at the same time as the Existing Combined Sewer Improvement works (with the exception of the range between M15 - to M15 - which will be executed separately) • Work Front - Line Works will commence at Diversion Chamber No 17 and proceed along Huynh Man Dat Street, An Duong Vuong Street and Su Van Hanh Street The Secondary Interceptor Sewer works located along line will be executed at the same time as the Existing Combined Sewer Improvement works • Work Front - Line Works will commence at Manhole ref: M65 on Mac Cuu Street and proceed along Chau Van Liem Street, Thuan Kieu Street, Le Dai Hanh Street, Thang Street and Ly Thuong Kiet Street One work team will be mobilised to each front, as highlighted above, and the works will be executed in blocks of approximately 200m For each stage of the work traffic control plans, including the construction schedule and the diversion procedure will be submitted to the Department of Transportation and Public Works (DTPW) for approval The works shall be arranged on the road occupancy permission received from the relevant Government Authorities Existing drainage facilities shall be maintained during the course of execution of the works 3.2 Care of Water CONCEPT FOR CARE OF WATER (REPLACEMENT SEWER) a Downstream portion of line constructed first; b Mainline pipe upstream of construction area (Part 1) is blocked and the flow is diverted around the area under construction into the completed downstream portion; c Upon completion of Part the completed lines and inlet branches are opened for use; d Mainline pipe upstream of construction area (Part 2) is blocked and the flow is diverted around the area under construction into the completed downstream portion; Page of 33 EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION e Upon completion of Part the completed lines and inlet branches are opened for use; f Mainline pipe upstream of construction area (Part 3) is blocked and the flow is diverted around the area under construction into the completed downstream portion; g Upon completion of Part the completed lines and inlet branches are opened for use; The sequence above is repeated until the line in question is completed CONCEPT FOR CARE OF WATER (ADDITIONAL LINE) a Downstream portion of line constructed first; b Mainline pipes upstream of construction area (Part 1) are blocked and the flows are diverted around the area under construction into the completed downstream portion; c Upon completion of Part the completed lines and inlet branches are opened for use; d Mainline pipes upstream of construction area (Part 2) are blocked and the flows are diverted around the area under construction into the completed downstream portion; e Upon completion of Part the completed lines and inlet branches are opened for use; f Mainline pipes upstream of construction area (Part 3) are blocked and the flows are diverted around the area under construction into the completed downstream portion; g Upon completion of Part the completed lines and inlet branches are opened for use; The sequence above is repeated until the line in question is completed For a pictorial representation of the above procedure reference is made to the drawing on page hereinafter Page of 33 EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT SHIMIZU CORPORATION MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) APPENDIX NO SAFETY RISK ASSESSMENT Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/013 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence Collision with other plant / traffic Night work People Affected YP instability Lifting close to O/H electric lines L (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control (F) Frequency Negligible Unlikely Likely Probable VIS Transportati on of equipment / material CESAR Oth er C F RR C F RR Safety induction / provide signage Ensure lifting hook is provided with safety latch Qualified, experienced operator Follow standards and check area prior to starting works S2 S2 S2 S2 PUB Traffic hazard Equipment falls when loading Crane BY: CO E PREPARED Injury √ √ S3 Injury √ √ S3 Injury √ √ S3 Electrocution / Injury √ √ S3 Injury √ √ S3 Ensure banksmen is present transporting equipment on the Site S2 Injury √ √ S3 Provide adequate lighting S2 Page of Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/013 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control People Affected YP Oth er C F RR S3 C F RR Provide adequate lighting S2 Night work Injury √ √ Interaction between plant / workers Electrocutio Injury √ S3 Safety induction, adequate signage, experienced operators S2 Injury √ S3 S2 Improper use of hand tools Night work Injury √ S2 Ensure electrical system installed by experienced personnel Safety induction / tool box S1 1 Injury √ S2 Interaction between plant / workers Improper Injury Provide adequate lighting / signage Safety induction, adequate signage, experienced operators S2 Injury Safety induction / tool box talks S1 1 n Cutting pavement L (F) Frequency Negligible Unlikely Likely Probable VIS Temporary Facilities CESAR PUB BY: CO E PREPARED talks √ S3 √ S3 √ S2 use of hand tools Page of Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/013 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence People Affected YP Welding in bad weather Collapse of trench sides Water ingress into excavation Resource falling into excavation L (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control (F) Frequency Negligible Unlikely Likely Probable VIS Excavation work and temporary shoring between plant / workers Night work CESAR Oth er C F RR S3 C F RR Service utility / marking / signage S2 PUB Undermine / damage existing services Interaction BY: CO E PREPARED Damage √ √ Injury √ S3 Safety induction, adequate signage, experienced operators S2 Injury √ S3 S2 Electrocution √ S3 Provide adequate lighting / signage Safety induction, tool box talks S2 Injury √ S3 S2 Injury √ S2 S1 1 Damage / injury √ S2 Temporary works design to be strictly implemented for each area means of egress, Adequate standby pumping facilities available vehicles close to Minimise edge of excavation, barricades etc S1 1 Page of Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/013 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence YP Pipe installation VIS People Affected PUB Disposal of surplus excavated material BY: CESAR L (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control (F) Frequency Negligible Unlikely Likely Probable CO E PREPARED Oth er C F RR S3 S2 Night work Injury √ Overload truck Traffic accident √ Interaction between plant / workers Night work Injury √ S3 Injury √ S3 Lifting hazard Damage / injury √ S3 Interaction between plant / workers Water Injury √ S3 Injury √ S2 √ ingress into excavation Page of Provide adequate lighting / signage Ensure no overloading, provide canvas cover for dump trucks Safety induction, adequate signage, experienced operators Provide adequate lighting / signage Experienced operators, daily inspection of equipment Safety induction, adequate signage, experienced operators Adequate means of egress, standby pumping facilities available C F RR S2 S1 1 S2 S2 S2 S2 S1 1 Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/013 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence People Affected YP VIS PUB Manhole / diversion chamber constructio n Oth er C F RR Injury √ S3 Lifting hazard Damage / injury √ S3 Interaction between plant / workers Water Injury √ S3 Injury √ S2 Injury √ S2 use of hand tools Collapse of trench sides Resource falling into excavation CESAR L (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control Night work ingress into excavation Improper BY: (F) Frequency Negligible Unlikely Likely Probable CO E PREPARED Provide adequate lighting / signage Experienced operators, daily inspection of equipment Safety induction, adequate signage, experienced operators Adequate means of egress, standby pumping facilities available Safety induction / tool box C F RR S2 S2 S2 S1 1 S1 1 S2 S2 talks Injury √ S3 Damage / injury √ S2 Temporary works design to be strictly implemented for each areavehicles close to Minimise edge of excavation, barricades etc Page of Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/013 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence YP CESAR L (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control Oth er C F RR C F RR Provide adequate lighting / signage Safety induction / tool box talks S2 S1 1 Night work Injury √ S3 Improper use of hand tools Interaction Injury √ S2 Injury √ S3 Safety induction, adequate signage, experienced operators S2 Injury √ S3 Safety induction, adequate signage, experienced operators S2 Injury √ S3 S2 Damage / injury √ S3 Provide adequate lighting / signage Experienced operators, daily inspection of equipment S2 between plant / workers Interaction Extraction of temporary shoring VIS Backfilling People Affected PUB BY: (F) Frequency Negligible Unlikely Likely Probable CO E PREPARED between plant / workers Night work Lifting hazard Page of Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/013 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence Injury √ √ Injury √ Con: Contractor; Pub: Public; YP Key: E: Employer; Traffic hazard Night work VIS Road work People Affected PUB 10 BY: CESAR L (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control (F) Frequency Negligible Unlikely Likely Probable CO E PREPARED Oth er Vis: Visitor; C F RR S3 S3 Safety induction / provide signage Provide adequate lighting / signage Approved by Safety Officer: YP: Young People Page of C F RR S2 S2 Date: Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT SHIMIZU CORPORATION MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) APPENDIX NO ENVIRONMENTAL RISK ASSESSMENT Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/014 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence People Affected YP Temporary facilities L (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control (F) Frequency Negligible Unlikely Likely Probable VIS CESAR Oth er C F RR C F RR PUB Transportati on of material / equipment BY: CO E PREPARED Fumes from transportati on Air / noise pollution √ √ √ E2 Vehicles should be regularly maintained Minimise noise as far as reasonably possible E1 2 Dust generation from roads Transportati on activities Air pollution √ √ √ E2 Water spraying to minimise generation E1 2 Noise pollution √ √ √ E2 Minimise noise as far as reasonably possible E1 2 Site clearance Noise pollution √ √ √ E2 Minimise use of noise generating machinery E2 Waste material Natural resource contaminatio E2 Implement frequent housekeeping & disposal to designated area(s) E1 2 √ Page of Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/014 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence People Affected (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control Oth er C F RR C F RR Cutting pavement Air / Noise pollution √ √ √ E2 Use water to minimise dust E2 Fume generation Air pollution √ √ √ E2 Ensure equipment is regularly maintained E1 2 Waste material Natural resource contaminatio Air pollution E2 Implement frequent housekeeping & disposal to designated area(s) Ensure equipment is regularly maintained E1 2 E1 2 Ensure noise reducing devices are used if available Implement frequent housekeeping & disposal to designated area(s) E1 2 E1 2 Fumes from equipment Excavation work Noise pollution Waste material Natural resource contaminatio YP Excavation work and temporary shoring L (F) Frequency Negligible Unlikely Likely Probable VIS Cutting pavement CESAR PUB BY: CO E PREPARED √ √ √ √ E2 √ √ √ E2 E2 √ Page of Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/014 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence People Affected (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control Oth er C F RR C F RR Fumes from transportati on Air / noise pollution √ √ √ E2 Vehicles should be regularly maintained Minimise noise as far as reasonably possible E1 2 Dust generation from roads Material spillage Air pollution √ √ √ E2 Water spraying to minimise generation E1 2 E2 E1 1 Fumes from equipment Air pollution E2 Ensure no overloading of trucks / provide canvas cover Ensure equipment is regularly maintained E1 2 Waste material Natural resource contaminatio E2 Implement frequent housekeeping & disposal to designated area(s) E1 2 Contaminatio n YP Pipe installation L (F) Frequency Negligible Unlikely Likely Probable VIS CESAR PUB Disposal of surplus excavated material BY: CO E PREPARED √ √ √ √ √ Page of Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/014 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence Waste material Natural resource contaminatio Air / noise pollution Transportati on activities Backfilling Dust generation Air pollution Material spillage Contaminatio n √ √ YP Air / noise pollution VIS Use of equipment People Affected PUB Manhole / diversion chamber constructio n BY: CESAR L (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control (F) Frequency Negligible Unlikely Likely Probable CO E PREPARED Oth er √ √ C F RR E2 E2 C F RR Vehicles should be regularly maintained Minimise noise as far as reasonably possible E1 2 Implement frequent housekeeping & disposal to designated area(s) Vehicles should be regularly maintained Minimise noise as far as reasonably possible E1 2 E1 2 √ √ √ E2 √ √ √ E2 Initiate water spraying to minimise dust generation E1 2 E2 Ensure no overloading of trucks / provide canvas cover E1 1 √ Page of Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/014 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence People Affected Air / noise pollution √ √ Fumes from welding / cutting Waste material Air pollution √ Natural resource contaminatio YP Equipment usage VIS PUB Extraction of temporary shoring BY: CESAR L (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control (F) Frequency Negligible Unlikely Likely Probable CO E PREPARED Oth er √ √ Page of C F RR C F RR E2 Vehicles should be regularly maintained Minimise noise as far as reasonably possible E1 2 E2 Ventilate accordingly if required E1 2 E2 Implement frequent housekeeping & disposal to designated area(s) E1 2 Appendix No EAST - WEST HIGHWAY AND WATER ENVIRONMENT PROJECT MANAGEMENT UNIT OF HO CHI MINH CITY HO CHI MINH CITY WATER ENVIRONMENT IMPROVEMENT PROJECT PACKAGE D - CONVEYANCE SEWER CONSTRUCTION AND EXISTING COMBINED SEWER IMPROVEMENT MS-009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION RISK ASSESSMENT - SF-03 WEIP/D/SF-03/014 (C) Health and Safety Consequence S1 Negligible / No Effect S2 Minor Injuries S3 Major Injuries S4 Fatalities Ref Activities Hazard METHOD STATEMENT: MS-009 EXISTING COMBINED SEWER IMP GASALATAN (C) Environmental Consequence E1 No Effect E2 Minor Effect E3 Major Effect E4 Irreversible Consequence Air / noise pollution √ √ Asphalt production / spreading Waste material Air pollution √ Natural resource contaminatio Con: Contractor; Pub: Public; YP Key: E: Employer; Equipment usage VIS Road work People Affected PUB 10 BY: CESAR L (RR)Risk Rating (Consequence (c) x Frequency (F)) 1~4 Insignificant Work May Proceed 5~8 Acceptable Work May Proceed ~ 12 Substantial Work may not proceed 13 ~ 16 Intolerable Work may not proceed Before Control Risk Control Measures After Control (F) Frequency Negligible Unlikely Likely Probable CO E PREPARED Oth er √ √ Vis: Visitor; C F RR C F RR E2 Vehicles should be regularly maintained Minimise noise as far as reasonably possible E1 2 E2 Vehicles should be regularly maintained E1 2 E2 Implement frequent housekeeping & disposal to designated area(s) E1 2 Approved by Environmental Officer: YP: Young People Page of Date: Appendix No ... and Conditions of Contract: • MS- 009- 02 Design of Temporary Shoring for Excavation (01) • MS- 009- 03 Design of Formwork (01) • MS- 010 -01 Method Statement for Road Reinstatement 1.1 Purpose The purpose... IMPROVEMENT MS- 009 EXISTING COMBINED SEWER IMPROVEMENT (INCLUDING SECONDARY INTERCEPTOR SEWER) SHIMIZU CORPORATION Initial Survey, MS0 01- 01 Soil Investigation MS0 02 -01 Utility Survey MS- 00 301 Preparatory... Backfilling Extract sheet piles Manhole shaft concrete Backfilling Road Reinstatement MS- 010 -01 * Page 10 of 33 Road reinstatement - RC Pipe shall be installed either before or after wall and top