3 excavation crossing

Buildings Practice For ProfessionalsConstruction Method Statements

Chapter 3 Excavations & CrossingsSafety General

1 Refer to Chapter 3, MS 12 & 13, Chapter 4, MS1, Chapter 6, Page 1 for general provisions on safety discipline in addition to those included with various method statements on this Chapter

2 Relevant point should be extracted from description in line to requirements on relevant activities

3 It is to be noted that safety standards vary from organization to organization, company to company & client to client

4 Just consideration of economy on project cannot exclusively, be a criterion to avoid or reduce safety measures

5 A minimum level of safety measures installations should be made a ‘must’ for a site supervise to ensure that workforce ‘must’ work safely

6 It is preferable to work with acceptable level of safety rather than loosening lives of workers

Excavations & CrossingsMS1

Site preparation & earthworkIndexScope - Reference documents – Definitions – Responsibilities – Safety – Method – Equipment - Attachment

Scope1. Purpose of this method statement is to define sequence of activities for site preparation

works related to Company Petrochemical project. 2. Extent of these activities, are defined upon attached site plan (Not included with this

statement).

Reference documents1 Specifications for Site preparation, Excavation & backfill for underground installations,

Fill, Grading and Paving, Testing Laboratory, Geotechnical Investigation

ResponsibilitiesDefinitions

1 PSM Project Site Manager2 CSM Construction Site Manager3 CS Construction Superintendent/Project Supervising Engineer 4 IS Infrastructure Superintendent5 SE Site Engineer6 GE Geotechnical Engineer7 SO Safety Officer8 GFM General Foreman9 FM Foreman10 QC Quality Control11 S Surveyor12 PPE Personal Protective Equipment

Page 1 of 88 2012 Int. P Eng (India) Suraj Singh


Chapter 3 Excavations & Crossings

Responsibilities1 PSM shall ensure that site preparation activities are carried out in line/according to

project specifications, within specified time & within budget cost since, PSM is responsible contractually for project site prosecution on an overall basis.

2 PSM shall manage to procure all required resources for relevant activities.3 PSM shall control overall operations respecting all activities in all respects being an

organization agent4 CSM shall arrange resources required accordingly and act overall responsible for

excavation operation directly reporting to PSM5 CS shall control, monitor and direct SE, GFM, FM and workforce for relevant activities6 GE shall ensure that activities are conducted inline/according to project specifications

and this method statement.7 SE shall be responsible for all site activities and follow instructions of CS/CM8 Whatever, mishap on excavation operation shall immediately, be notified to CS and CM

by SE for immediate action, if so required for either possible remedy or record for authority review, whatsoever a case it may be

9 IS shall ensure that site preparation activities are carried out in line / according to this method statement as well as, complying with all contract/project specifications.

10 GFM shall be responsible for whole lot of workforce available on site for distribution, extraction of output, redeployment, supervision & controls.

11 GFM shall ensure that required workforce should be allotted to respective site everyday during morning depending on various activities in which connection, a coordination, interactions with site engineers/supervisors/CM/CS etc. shall be required continuously

12 GFM shall also, ensure that required equipment are available on sites during activities13 GFM shall everyday report all actions to CM/CS & Engineers14 FM shall execute operations deploying workforce & explain in full in language, work

persons understand about all instruction and Toolbox talks everyday and ensuring that instructions are followed up by workers regularly

15 QC shall inspect all operations required to be effected according to specifications & in line to ITPs requirements

16 S shall ensure that all surveys are conducted to requirements with all bench marks & grid coordinates located to requirement as well as, all survey recorded for submission

17 SO shall ensure that all safety requirements are complied with/met by site personnel18 EPC Contractor shall conduct surveillance over all ongoing activties all days as well as

ensure that inspections are conducted regularly by Engineer/client

Safety1 Prior to commencement of whatever activity, workforce shall receive a STARRT

card/Toolbox talk. 2 Process involving a particular safety risk, shall be calculated by conducting Job hazard

Assessment and necessary protective measures adopted to address risk issue.3 Included measures should comply with real requirement/standard as accepted or

recognized by industry/OSHA etc.4 In this case, excavation has to be carried out on Operating Authority area therefore all

regulated precautions shall be strictly adhered to effect ‘full safety standard’.



Chapter 3 Excavations & Crossings5 Only, specifically approved mechanical equipment/third party certified, whilst locating

these services shall be used6 Generally, where appropriate, only manual excavation shall be carried out to investigate/

expose existing either plant services or other services that may cause sudden damage or breakdown, should excavation be effected without investigation

7 SO shall ensure that persons being inducted on site are well aware of adopting right/suitable safety procedure to be implemented on site for activity concerned.

8 All persons available upon site shall wear PPE issued to them. 9 Where possible, hazards may arise from excavation activities, necessary safety measures

shall be adopted to prevent accident or injury at all times during personnel’s presence on site/work.

10 This may include provision of signage, barriers, watchman and night lighting.11 When, traffic is required to be diverted for requirement to cross some road, permit to

work shall be obtained supported by detailed method statement including detailed traffic diversion plan with all other working details

12 Permits to work and installation safety equipment shall be attained prior to respective activity commences.

13 Scanning of existing services shall be conducted by suitable methods prior to excavation is commenced with

Safety Supervision 1 A competent inspector shall visit included area daily to assess safety measures adopted. 2 Snags observed during visit shall be notified to supervisor present, who immediately,

would act to bring adopted safety measures to an acceptable standard 3 In case of certain incident, where utilities ‘not identified’ are discovered or damaged, all

works shall stop in area and Operator Shift Controller and HSE department immediately, notified.

Method (refer to sketch # 20)1 Survey team shall locate and mark all services that are present upon site (This includes

above ground services as well as, buried services). 2 These services, (Electric, telephone, gas, oil, chemical, water etc) shall be clearly marked

using stakes and warning tapes, reflected upon a site drawing and issues raised with client.

3 Survey team shall also, mark upon site plan all obstructions, structures and developments. 4 All obstructions encountered during excavation activities shall be plotted, recorded &

submitted.5 Where hazardous material is encountered, it shall be identified and isolated in compliance

with safety procedures under SO supervision. 6 Client shall be informed & hazardous material to be collected and removed to a licensed

tipping place. Details of material and tipping arrangements shall be documented for review by client as appropriate. Refer to Method statement Removal of hazardous materials.

7 Existing structures, fences and developments shall be demolished in a safe manner as site stripping activities proceed.

8 Necessary permits, approvals and permission shall be obtained from concerned authorities prior to commencement of activity.



Chapter 3 Excavations & Crossings9 Method of removal of these existing elements shall usually be conducted by dozer or

breaker. 10 Where necessary otherwise, discussions on site shall be made concerning alternate

methods of removal, when full extent of these structures are exposed. 11 Removal of topsoil shall include all vegetation and rubbish material from work site. 12 Prior to start of topsoil removal, surveyor shall peg out haul roads to be used by

construction equipment to execute all site preparation activities. 13 These roads shall be constructed by leveling of existing terrain. 14 Grade pegs shall be set to an agreed grid to indicate existing grade and reduced grade. 15 Dependent upon quality of existing soil, where road is to be built, suitable compactable

fill may be imported or relocated from other parts of site. 16 Material shall be approved by GE & QM/QE jointly.17 These roads shall be maintained as work proceeds.18 Where required, water shall be spayed for dust control.19 For general removal of topsoil activities using appropriate equipment, areas concerned

shall be excavated and graded to levels that ensure adequate surface water drainage. 20 GE/QM/QE shall monitor activity to ensure that topsoil material is removed. 21 Sampling and testing of resultant material shall be conducted for specification

compliance & proper compaction. 22 Upon completion of topsoil removal activities where appropriate, exposed surface shall

be scarified, moistened and compacted to achieve required density criteria. 23 Areas shall be divided into manageable sections that be defined upon sketches. 24 GE shall monitor and test all sections, results of which tests shall be recorded upon

relevant QC format. Number of tests conducted shall reflect specification requirement.25 In excavation areas, GE shall review material to be excavated to ascertain its suitability

for reuse as fill material. 26 This excavated material shall be transported to areas that require filling. 27 Material shall be deposited onto areas to receive filling, leveled, moisture conditioned

and compacted. 28 If necessary, stockpiling may be required.29 Excavated areas shall be divided into manageable sections, which be defined upon

sketches. 30 Excavated areas shall be monitored by GE to ensure that any unsuitable material does not

appear. 31 Where unsuitable material appears, it shall be removed. 32 Excavated formation surface shall be treated by scarification, moistened and compacted

inline/according to specification criteria. 33 All areas shall be tested and results recorded for submission.34 Where areas are to receive fill, material that has been excavated shall be transported to

fill area, tipped, leveled, moisture conditioned and compacted. 35 Material shall be spread and leveled in 200mm layers. 36 Areas to be filled shall be divided into manageable sections that be defined upon a sketch. 37 Fill layer shall be moistened and compacted to achieve required specification criteria. 38 No further fill activity shall be conducted upon an area that has not been approved and

released by GE.



Chapter 3 Excavations & Crossings39 Attention shall be observed at edges and slopes, to ensure that compaction criteria are

achieved.40 Additional layers of fill material shall be placed similarly, as described above, until

desired elevation has been achieved.

Production/Output procedureVerification exercise for fill activity was conducted to establish economical and effective method for fill activity, details of which are indicated below.

1 Import and place fill to controlled areas of approximate size 25m wide by 100 - 150m long.

2 Spread and level imported fill on whole strip.3 Add water to fill layer by passing water tanker over fill layer. 4 Water tanker should pass over layer twice.5 A time gap of approximately, two hours is allowed for water to soak into fill material.6 Layer is now mixed with grader, until a uniform blend of moist material is achieved.7 Additional water is added by passing water tanker over layer in a uniform sequence. 8 A time period of approximately one hour is allowed for this water to soak into fill layer.9 Fill layer is mixed again with grader leaving fill level to correct grade.10 Vibrating rollers shall now, compact fill layer in a logical sequence that compacts fill

layer uniformly.11 Testing of layer shall be conducted according to inline/specification requirements.

Equipment1 Dozers & Graders, Vibrating drum rollers, Dumper trucks, Excavators & Loaders, Water

tankers

Attachment1 None2 Assume there was nothing prior to construction & whole site was filled for preparation

works.3 This project is Green filed job

MS2 Protection of existing services

IndexScope - Reference documents – Definitions – Responsibilities – Safety – Method – Equipment - Attachment

Scope1 Purpose of this method statement is to define procedure that can be implemented for

identification, protection and/or removal/relocation of existing services upon site.

Reference documents1 Specifications: Site preparation, Fill, Grading and Paving (certain sections requiring to

record services within specifications)



Chapter 3 Excavations & CrossingsDefinitions


















Chapter 3 Excavations & Crossings17 SO shall ensure that all safety requirements are complied with/met by site personnel18 EPC Contractor shall conduct surveillance over all ongoing activties all days as well as


Responsibilities in addition to foregoing general description1 PSM to ensure that identification, protection and/or removal/rerouting to existing services

are conducted in a safe methodical sequence, as defined by this method statement as well as, directed by relevant authorities.

2 IS shall coordinate investigation of existing services with Plant authorities, so that an earliest resolution is reached to existing services, without causing any undue delay to prosecution of concerned sequence activity.

3 S shall accurately plot and record all existing as well as, if so required to be diverted, relevant services involved on site, for reporting purpose.

4 SE shall ensure that excavation is rightly carried out in all respects in line to drawings & specification & in compliance with all safety procedures.

5 SO shall ensure that excavations are safely carried out.




recognized by industry/OSHA etc.4 Permits to work and installation safety equipment shall be attained prior to respective

activity commences. 5 In this case, excavation has to be carried out on Operating Authority area therefore all

regulated precautions shall be strictly adhered to effect ‘full safety standard’.6 Only, specifically approved mechanical equipment/third party certified, whilst locating















Method (sketch # 20)1 From existing record drawings provided by relevant authorities controlling Plant, existing

services shall be located and exposed by hand excavation.2 ST shall check and accurately, record these existing services. 3 A line of pegs shall be positioned to indicate route of existing services. 4 Warning tape and/or nylon cord to indicate and protect route of service shall be provided. 5 ST shall inform IS about exact location of services relative to warning flags. 6 Whether or not, an existing service be disbanded or made redundant, shall be decided by

operating authority, for which process of an inspection should be conducted in which relevance, existing service shall be exposed to allow for inspection as well as, confirmation of its demanded status by authorities.

7 IS through EPC Contractor representative shall request relevant authority to review excavated service to confirm status as well as, instruct for necessary action required for removal or diversion.

8 Redundant service shall be removed under supervision of IS according to agreed criteria defined by relevant authority.

9 Where an existing live service remains working or serving during site preparation activity, such as 33KVA electric cable, that existing live service shall be protected in compliance with regulations.

10 Upon location of live service, ST shall mark that location upon ground using spray paint or small pegs. At necessary locations along route of existing live service indicated by ST, small hand dug pits shall be excavated to expose live service to ensure its location.

11 On ten meters (10m) either side of route of existing live service shall be erected posts at suitable centre/s.

12 A nylon cord with warning tape streamers shall be strung between posts to clearly indicate service and its route.

13 Signboards that indicate service name/what exactly live service within marked corridor is, shall also, be displayed at sufficient locations conveniently, within view along route.

14 Where temporary roads cross existing cables, sufficient suitable fill material shall be placed on top of cables to afford adequate protection by distributing axle loadings safely.

15 Safety Officer shall periodically, check condition of barriers, where necessary refurbishment is conducted.

Equipment1 Excavation Tools, Survey Equipment, Pegs, Nylon cord, Warning tape.

Attachment1 None (Attachments depends on available record drawings)



Chapter 3 Excavations & CrossingsMS3

Rerouting of 33kv cablesIndexScope- Reference documents- Definitions- Responsibilities- Safety- Method- Equipment- Attachment

Scope1 Purpose of this method statement is to define procedure that can be implemented for re

routing existing 33KV electric cable that crosses project site. 2 This method statement includes location, excavation, isolation, rerouting, jointing, testing

and backfill.

Reference documents1 Site drawing, Record Drawings

Definitions1 PSM Project Site Manager2 CSM Construction Site Manager3 CS Construction Superintendent/Project Supervising Engineer 4 IS Infrastructure Superintendent5 SE Site Engineer6 GE Geotechnical Engineer7 SO Safety Officer8 GFM General Foreman9 FM Foreman10 QC Quality Control11 S Surveyor12 PPE Personal Protective Equipment










Chapter 3 Excavations & Crossings9 IS shall ensure that site preparation activities are carried out in line / according to this

method statement as well as, complying with all contract/project specifications. 10 GFM shall be responsible for whole lot of workforce available on site for distribution,

extraction of output, redeployment, supervision & controls.11 GFM shall ensure that required workforce should be allotted to respective site everyday

during morning depending on various activities in which connection, a coordination, interactions with site engineers/supervisors/CM/CS etc. shall be required continuously







Responsibilities in addition to foregoing general description1 PSM to ensure that identification, protection and/or removal/rerouting to existing services

are conducted in a safe methodical sequence, as defined by this method statement as well as, directed by relevant authorities.

2 IS shall coordinate investigation of existing services with Plant authorities, so that an earliest resolution is reached to existing services, without causing any undue delay to prosecution of concerned sequence activity.

3 S shall accurately plot and record all existing as well as, if so required to be diverted, relevant services involved on site, for reporting purpose.

4 SE shall ensure that excavation is rightly carried out in all respects in line to drawings & specification & in compliance with all safety procedures.

5 SO shall ensure that excavations are safely carried out.







these services shall be used



Chapter 3 Excavations & Crossings7 Generally, where appropriate, only manual excavation shall be carried out to investigate/











Contacts/phones1 Phone references: 2 Shift Controller 3 Emergency Number 4 HSE Direct number

Employees working in easement area shall have a daily pre task briefing that includes;1 Reporting of incidents2 Methods of work and tools to be used3 Potential hazards found in Easement areas4 Approved work method statement5 EPC Contractor and Civil Contractor HSE department shall participate in presenting

STARRT card briefing, would monitor activities to ensure that work methods are being followed upon and all personnel have an understanding about hazards associated with working adjacent to live process areas

Excavation Work Permit 1 A copy of ‘work permit’ shall be posted on a mini board, installed on site to be noticeable

to all persons involved 2 Barricades cones, markers, night lights and floodlights etc. shall be installed as required

for a complete safety.



Chapter 3 Excavations & CrossingsFlagman

1 On all directions, in addition to traffic sign boards, flagmen shall be engaged to operate full time to direct traffic about ‘excavation work in progress’ by waving ‘flag signal’ for all vehicles passing by

Hand Excavation 1 Excavation to expose services shall be carried out manually.2 In case, certain services not shown on record drawings such as fibre optics, but it is

discovered then further excavation shall be ceased, until a decision for employing hydro jetting method is taken up by plant authorities to be adopted for further excavation

Access to trench1 Workers shall clearly be instructed to use only ladders, whether to enter in/ingress or get

out/egress of trench. 2 No jumping shall be allowed

Jack Hammer1 Workers engaged on operating this equipment shall use protective glass and work in

phases with pause intervals. 2 Compressor air pressure shall be monitored from time to time, so that hammer works

smoothly.3 Compressor shall be placed within barricade limits

Machine Excavation1 Operators/drivers shall be explicitly instructed to abide by requirement of reverse signal

and sound, when operating reverse. 2 Banksman shall be engaged, when equipment is in operation. 3 No violation of traffic rules shall be allowed, so as not to cause any accident.

Toolbox Talks 1 While conducting Toolbox Talks, a representative from authority shall be involved to

witness and sign instruction imparted with workers, prior to commencement of operations for record purpose.

2 Only, English literate Foreman shall be employed to work on excavation execution.

Traffic Management if required1 Sign boards keep up-All personnel shall be briefed about safe keep up of sign boards2 Barricades, cones, markers and night lights, flood lights etc. shall be arranged as required

for a complete safety.3 No oil spillage shall be allowed. 4 Sides of excavation shall be sloped with barriers placed on, to indicate excavation work

in progress

Method (sketch # 20)1 Prior to excavation at points, where new cable is to be connected to existing 33KV cable,

necessary permits to work shall be obtained from operating authority.



Chapter 3 Excavations & Crossings2 EPC Contractor method statement for conducting cable Diversion shall be complied with.3 Existing route of 33KV cable shall be identified, marked & a barrier erected on either

side clearly defining route across site.4 Route proposed for new 33KV cable on AFC drawing shall be identified, marked on site

with pegs by ST, for which excavation shall commence to line and required level. 5 When excavation has reached to required level, appropriate sand bed shall be placed

within trench.6 New cable supplied by EPC Contractor shall be laid into trench inline/according to

approved methods and standards that would include placing of cable drum on a cable trolley and rollers.

7 Cable shall be unwound from cable drum by pulling to standard methods of pulling. 8 If required, a cable tugger fitted with load cell control, may be utilized.9 New cable shall be correctly placed to line and level upon prepared sand bed. 10 Wherever joints occur, sufficient cable overlap, to allow for jointing shall be provided.11 Insulation value of new cable shall be tested by 5KV motorized megger.12 Upon EPC Contractor Electrical Engineer/Engineer approval, cable shall be covered with

dune sand to required thickness evenly. 13 Cable tiles shall be placed on top of sand cover above new cable.14 Trench shall be backfilled with approved material meeting specifications. 15 Backfill activity shall continue, until trench is completely filled. 16 Route markers shall be placed with splice joints, locations surveyed and recorded.17 Where joints occur to cable either at two termination points with old cable or along

length of new cable, same technique shall be adopted.18 An experienced cable jointer, under supervision of an electrical engineer shall conduct all

cable jointing work.19 Approved jointing kits shall be utilized for cable jointing activities. 20 Manufacturer’s recommendations relating to installation of these jointing kits shall be

followed. 21 Upon completion of jointing of new cable length, entire length of new cable shall be

tested. 22 Cable shall be subjected to a pressure test of 67KV DC for 15 minutes on cable between

each core and earth. 23 Remaining cores shall be connected to earth. 24 Engineer shall measure leakage current, which all readings should be recorded upon

appropriate form. 25 Cable testing shall be witnessed by EPC Contractor/Engineer.26 Old cable shall be hand dug/excavated & an area sufficient to conduct jointing of cable

should be excavated.27 Electrical engineer in coordination with EPC Contractor engineer shall ensure that old

cables are identified and isolated, under supervision of Refinery Supervisor within appropriate substation.

28 Necessary electrical earth and isolation to cables shall be conducted prior to commencement of jointing old cable to new one.

29 Cables shall be jointed in same manner as described previously.30 Once, old/new cables have been jointed, these shall be tested by mega test at 5KV and

HV test at 53KVDC to establish its integrity and insulation.



Chapter 3 Excavations & Crossings31 Disbanded cable shall be removed from new jointed cable by excavating and rolling

cable.32 New cable route corridor shall be covered with sand, cable tiles and backfill material.33 Upon completion of cable testing activities, Refinery Electrical engineer shall authorize

energizing of new cable route.34 Disbanded cable route shall be excavated to expose old cable. 35 Old cable shall be removed onto surplus cable drums, from which, new cable was coiled. 36 These drums shall be stored on site for EPC Contractor disposal.37 A program to be developed by all parties of ‘power outage windows’ shall be produced

for tie-in activities of cables.

Equipment1 Excavator, Dump trucks, Cable drum trolley, Cable rollers, Cable tugger with load cell

Attachment1 EPC Contractor standard method statement for cable diversion2 (Since, this statement may be submitted by Civil Works subcontractor on behalf of EPC

contractor, EPC standard method statement is required to be attached)MS4

Concrete pipe culvertsIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment

Scope1 Purpose of this Method Statement is to define sequence and methodology for laying,

jointing and testing concrete pipe culverts.

Reference documents1 Specification 2 Drawing #





















Responsibilities in addition to foregoing general description1 S shall accurately plot and record all as built marks respecting bedding, pipes & finished

ground.2 SE shall ensure that excavation is rightly carried out in all respects in line to drawings &

specification & in compliance with all safety procedures.3 SO shall ensure that excavations are safely carried out.4 SO shall ensure that equipment operators comply with safe procedures

Safety



Chapter 3 Excavations & Crossings1 Prior to commencement of whatever activity, workforce shall receive a STARRT



recognized by industry/OSHA etc.4 Only, specifically approved mechanical equipment/third party certified, whilst locating






9 This may include provision of signage, barriers, watchman and night lighting.10 Scanning of existing services shall be conducted by suitable methods prior to excavation

is commenced with




Method (sketch # 25)Setting Out

1 Edge coordinates of pipe shall be calculated from information on drawing as well as, allowing for 1:1.5 slope & fixed in such a way, that full length of pipes are used without pipe cutting.

2 Center line and actual width shall be marked on ground.

Excavation1 Trench shall be excavated to correct width, length and formation by using a Hydraulic

backhoe. 2 Once, bulk excavation is completed, wooden pegs shall be inserted showing elevations

marked on them to guide & complete excavation to defined formation levels. 3 Formation shall be watered and compacted, using a plate compactor to achieve

compaction to 90% MDD meeting in accordance with specification. 4 Compacted formation shall be inspected/field compaction tested prior to commencement

of bedding activity.



Chapter 3 Excavations & CrossingsBedding

1 Once excavation is complete & approved, bedding material shall be placed to a thickness of 150mm, watered and compacted meeting in compliance with specifications

2 Compacted surface shall be inspected, tested and approved.

Pipe Work1 Socket positions shall be set out on prepared bedding.2 Manual excavation shall be carried out for socket portion, ensuring that barrel of pipe

rests firmly on bedding. 3 Concrete pipes shall be transported from store to location of trench and gently, lowered

into trenches with a crane using belt slings only. 4 It shall also, be ensured that spigot ends remain clean to same standard as were original,

while installing gaskets. 5 Spigot end of pipes shall be cleaned using a cloth with special care taken to clean recess,

which should be lubricated with liquid soap following which, gasket placed in position. 6 Socket ends shall be placed upstream, while pipes should be laid back to back to correct

orientation.7 Supports shall be placed at one end, while spigot should be so placed that gasket remains

in contact with entry taper/bevel at socket evenly on circumference. 8 Spigot shall then be drawn into socket using a 5 ton Tirfor equipment. 9 Upon completion of jointing operation, bedding material shall be packed below pipes, so

that barrel rests firmly on bedding and pipe does not move. 10 Top elevation of pipe shall be checked to ensure that laid pipe is accurately placed to

correct alignment and elevations. 11 Procedure/operation shall be repeated, until all pipes are so laid. 12 Completed pipe work shall be inspected and approved. 13 Each joint shall be visually inspected from inside pipe if accessible.

Backfill1 Once pipes have been laid to True gradient and alignment as described above, bedding

material shall be carefully placed along sides and in between pipes by using a backhoe. 2 Bedding and surround material shall be placed in layers, watered and compacted, until

surround material reaches 300mm above top of pipe. 3 Excavated suitable material shall then be used for backfilling in 200/150mm compacted

layers inspected and tested, until backfilling operations are completed.4 A list of Do’s and Don’ts provided by manufacturer is attached herewith.

Equipment1 Crane 20Ton 1 #2 Flat Bed Trailer Part time3 Excavator Backhoe 1 #4 Trifor 5 Ton 2 #s5 Fork lift Part time6 Plate Compactor 1 #7 Water Tanker Part time 1#



Chapter 3 Excavations & CrossingsLabour

1 Foreman 1 # 2 Pipefitter 2 #s 3 Labourer 4 #s

Attachment1 Manufacture’s datasheet respecting pipe

MS5Culvert crossings to avenue e and main highway

IndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment

Scope1 Purpose of this statement is to define sequence and methodology for excavation,

placement of culvert pipes, backfill and reinstatement to culvert crossings on avenue E and main highway next to retention pond.

Reference documents1 Drawing #







and this method statement.7 SE shall be responsible for all site activities and follow instructions of CS/CM



Chapter 3 Excavations & Crossings8 Whatever, mishap on excavation operation shall immediately, be notified to CS and CM











Responsibilities in addition to foregoing general description1 S shall accurately plot and record all as built marks respecting bedding, pipes, asphalt &

finished ground.2 SE & SO shall ensure that traffic diversion works well from safety viewpoint3 SE shall ensure that excavation is rightly carried out in all respects in line to drawings &

specification & in compliance with all safety procedures.4 SO shall ensure that excavations are safely carried out.5 SO shall ensure that equipment operators comply with safe procedures6 SO shall ensure that vehicles on highway are not impended from smooth movement7 PSM shall ensure regarding work involving highway, police or concerned authority is

informed in time for assisting controls






regulated precautions shall be strictly adhered to effect ‘full safety standard’.



Chapter 3 Excavations & Crossings6 Only, specifically approved mechanical equipment/third party certified, whilst locating












Contacts/Phone references: 1 Shift Controller 2 Emergency Number 3 HSE Direct number


STARRT card briefing, would monitor activities to ensure that work methods are being followed and all personnel have an understanding about hazards associated with working adjacent to live process areas

Excavation Work Permit 1. A copy of ‘work permit’ shall be posted on a mini board installed on site to be noticeable

to all persons involved 2. Barricades cones, markers, night lights and floodlights etc. shall be installed as required





Flagman1. On all directions, in addition to traffic sign boards, flagmen shall be engaged to operate

full time to direct traffic about ‘excavation work in progress’ by waving ‘flag signal’ for all vehicles passing by

Hand Excavation 1. Excavation to expose services shall be carried out manually.2. In case, certain services not shown on record drawings such as fibre optics, but it is


Access to trench1. Workers shall clearly be instructed to use only ladders, whether to enter in/ingress or get

out/egress of trench. 2. No jumping shall be allowed

Jack Hammer1. Workers engaged on operating this equipment shall use protective glass and work in

phases with pause intervals. 2. Compressor air pressure shall be monitored from time to time, so that hammer works

smoothly.3. Compressor shall be placed within barricade limits

Machine Excavation1. Operators/drivers shall be explicitly instructed to abide by requirement of reverse signal

and sound, when operating reverse. 2. Banksman shall be engaged, when equipment is in operation. 3. No violation of traffic rules shall be allowed, so as not to cause any accident.

Toolbox Talks 1. While conducting Toolbox Talks, a representative from authority shall be involved to


2. Only English literate Foreman shall be employed to work on excavation execution.

Traffic Management1. Sign boards keep up-All personnel shall be briefed about safe keep up of sign boards2. Barricades, cones, markers and night lights, flood lights etc. shall be arranged as required

for a complete safety.3. No oil spillage shall be allowed. 4. Sides of excavation shall be sloped with barriers placed on, to indicate excavation work

in progress

Deep Trenches



Chapter 3 Excavations & Crossings1. Since, proposed excavation is considerably wide and deep, all safety measures shall be

resorted to and if required, shoring shall be provided to prevent caving in. 2. Trench depth being more than 1200 mm, adequate means of exits, such as either

Aluminum ladder or steps shall be provided and located not more than 8 m of lateral travel.

Existing Services1. 2 # electric poles and other various categories of about 8 to 10 # running services ducts,

cables etc shall be properly diverted according to regulatory requirement and preserved until reinstated

Precast members1. Since, precast culvert units, covers and sleepers are heavy in load, proper care has to be

exercised during raising & downing (handling) to exact locations strictly adhering to relevant safety measures

Method (sketch # 17)1. Route of culvert trench shall be set out by surveyor complying to details of coordinates

provided on design drawings2. Existing services, such as fibre optic cable shall be located and protected. 3. Cable shall be supported across excavation, placed within a PVC duct, wrapped with

polythene & tied to support.4. Traffic diversion scheme with all signs installed shall be implemented inline/according to

attachment and monitored regularly, by safety department to ensure a smooth traffic management.

5. Concrete barriers shall be placed at head of diversion. 6. Ditch along side of diversion shall be barricaded with nylon rope bearing warning tape. 7. Initial excavation shall commence at drainage ditch to west side of avenue E and extend

across avenue E up to fibre optic cable location.8. Trench shall be excavated using appropriate equipment, while dump trucks collect

surplus excavated earth to be removed from site to spoil area. 9. Material that is to be reused shall be stockpiled. 10. Excavated asphalt shall be deposited at tip area in pre agreed location. 11. Damage to existing asphalt shall be repaired during reinstatement operation.12. Sides of excavation shall be sloped, where excavation depth exceeds 1.2 m. 13. Ladders shall be provided for ingress and egress of excavation. 14. Ladders shall be located every 8 m if so required, depending on length of excavation.15. A banksman shall be provided to monitor excavation machine operations.16. Bottom of excavated trench shall be inspected by EPC Contractor engineer prior to

compaction activity commences. 17. All unsuitable material shall be removed from site & disposed off to some approved

location. 18. Inspection and testing of compaction shall be conducted by site test laboratory. 19. Field density test results shall be submitted for approval & records.20. Surveyor shall monitor line and level of excavation regularly & provide level pins for

pipe bedding.



Chapter 3 Excavations & Crossings21. Approved bedding material shall be placed and compacted to required levels and density

values. 22. Site test laboratory shall conduct field density tests & reported accordingly. 23. Concrete culvert pipes shall be placed correctly to line and level, as shown on IFC

drawing. 24. Pipes shall be inspected for damage prior to placement for no damaged pipes can be

placed. 25. Spigot head on culvert pipe shall be on upstream end of pipe. 26. A pair of nylon strap shall be used to lift pipes using a 50 ton crane and place pipes

correctly into trench. Backfill material shall be placed around pipes in layers 150mm thick duly compacted & tested by laboratory.

27. Backfill operations shall continue up to existing road formation level.28. When backfill activity is completed, asphalt repair to existing highway shall be

conducted & avenue E road construction be reinstated. 29. Traffic management scheme shall be removed to allow reuse of avenue E.30. A temporary security fence outside existing RRD area shall be erected to allow culvert

construction to continue east towards retention pond. 31. Temporary security fence shall be erected to agreement/requirements of security police. 32. When this activity is completed and approved by security police, existing security fence

can be cut and rolled back sufficiently, to allow construction activities to be conducted.33. Next section for culvert trench shall be excavated taking care of, where existing services

have been exposed to be well protected.34. Trench formation shall be inspected, compacted and tested as previously described.35. Pipe bedding shall be placed, compacted and tested as previously described.36. Pipes shall be installed within trench, after inspection for transit damage is completed.37. Backfill around pipes shall be placed, compacted and tested.38. Backfill shall be reinstated above pipe surround up to existing ground level.39. Reinstatement of all existing services shall be done.40. Fibre optic cable shall be left protected by PVC duct and polythene sheet then surrounded

with concrete. 41. Existing security fence shall be replaced. 42. Existing fabric shall be re erected onto existing poles, which should be re concreted in

position. 43. Barbed wire shall be replaced, using new material, where required.44. Temporary security fence shall be removed.45. Final section of culvert trench shall be set out and excavated in same sequence as

previous sections.46. Compaction and testing of pipe bedding shall be carried out.47. Placement of pipes to correct line and level shall be carried out.48. Backfilling of pipe surround shall be conducted. 49. Reinstatement of backfill above pipe surround material shall be conducted. 50. Site test laboratory shall conduct field density testing. 51. Inlet and outlet chambers of crossing shall be constructed.(Refer to method statement for

chambers) 52. This procedure shall be similarly, followed in principle for all other culverts crossings on

avenue E.




Equipment1 Excavators/Dump trucks/Compactors

Attachment1 None

MS6Excavation in operating authority controlled areas

IndexScope/Reference Documents/Definition/Responsibilities/Safety/Method/Equipment/Attachment

Scope1 Purpose of this method statement is to define methodology that shall be implemented for

construction activities, which may be conducted in areas under designated Operating Authority’s control.

2 These areas shall primarily be easement entitled, statutorily meant for use by all services incoming & outgoing in relation to certain facility.

Documents1 All applicable Operating Authority easement drawings2 All applicable EPC Contractor project Drawings3 All applicable EPC Contractor project specifications






excavation operation directly reporting to PSM5 CS shall control, monitor and direct SE, GFM, FM and workforce for relevant activities



Chapter 3 Excavations & Crossings6 GE shall ensure that activities are conducted inline/according to project specifications












Responsibilities in addition to foregoing general description1 S shall accurately plot and record all as built marks respecting bedding, pipes, asphalt &

finished ground.2 SE & SO shall ensure that traffic diversion works well from safety viewpoint3 SE shall ensure that excavation is rightly carried out in all respects in line to drawings &

specification & in compliance with all safety procedures.4 SO shall ensure that excavations are safely carried out.5 SO shall ensure that equipment operators comply with safe procedures6 SO shall ensure that vehicles on highway are not impended from smooth movement7 PSM shall ensure regarding work involving highway, police or concerned authority is

informed in time for assisting controls8 PSM shall ensure that validity of permit to work is in force, until involved works are

completed



Assessment and necessary protective measures adopted to address risk issue.



Chapter 3 Excavations & Crossings3 Included measures should comply with real requirement/standard as accepted or





















Excavation Work Permit 1 A copy of ‘work permit’ shall be posted on a mini board installed on site to be noticeable



Method (sketch # 20)1. Construction Manager shall assign an Engineer and Construction Foreman to be

responsible for relevant activities.2. Engineer shall be responsible for producing a detailed method statement for activities to

be carried out.3. This method statement shall contain procedure defined/required below. 4. All procedures for work permit shall be complied with such as submission of traffic

diversion scheme including all details about onsite management, while diverting traffic during work ongoing progress

5. When method statement has been agreed with EPC Contractor/operator authorities, a work permit covering work activities within area of work shall be obtained from Operating Authority & duly registered into work permit log.

6. Permits shall be obtained for confined space, non confined space, works on busy roads etc.

7. Work area shall be surveyed to establish existing services location using Operating Authority easement drawings and cable detector.

8. These services shall be exposed by hand dug/manually excavated trenches along route. 9. Where existing service may cross route of proposed work activity, adequate protection

and warning of that existing service shall be provided.10. Method of excavation for work activity shall be defined upon work permit. 11. Where mechanical methods are accepted, a banksman shall be deployed with all

mechanical excavation equipment to check for all existing services and advise operator of excavation machine.

12. Excavated material, where possible shall be stockpiled in a controlled area location. 13. Unsuitable material shall be removed from site to spoil area immediately.14. Where soil conditions dictate, sides of trench shall be sloped to avoid subsidence.15. During work activities, site shall be kept clean & tidy without causing any obstruction to

site circulation16. Civil Contractor QC department shall conduct required inspection and test regime

required under ITP.17. Upon completion of work activity, all rubbish shall be removed from work site. 18. Easement area shall be left well graded to satisfaction to operating authority.

Equipment1 Cable scanner/Dump trucks/Excavators as applicable/Compactors

Attachment1 Checklist MS




Excavation for 132kv cable interconnection/cable laying informationIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment

ScopeThis statement is aimed to present proposed procedures to be adopted to carry out excavation in preparation for laying 132 KV electrical Cable from GUP power station through to Company project site substation.

Reference documentsSpecification, Excavation & Backfilling for Underground structures












Chapter 3 Excavations & Crossings10 GFM shall be responsible for whole lot of workforce available on site for distribution,









Responsibilities in addition to foregoing general description1 S shall accurately plot and record all as built marks respecting bedding, cable route, cable

elevation, possible control references & finished ground elevations.2 SE shall ensure that excavation is rightly carried out in all respects in line to drawings &

specification & in compliance with all safety procedures.3 SO shall ensure that excavations are safely carried out.4 SO shall ensure that equipment operators comply with safe procedures5 SO shall ensure that all safety measures are effected, while cable is being pulled in to

trench from drums6 PSM shall ensure that validity of permit to work is in force, until involved works are

completed











Chapter 3 Excavations & Crossings8 SO shall ensure that persons being inducted on site are well aware of adopting

right/suitable safety procedure to be implemented on site for activity concerned.9 All persons available upon site shall wear PPE issued to them. 10 Where possible, hazards may arise from excavation activities, necessary safety measures



is commenced with










Method (sketch # 20)1 Permits for involved area excavation shall be obtained from relevant authorities.2 Surveyor shall set out proposed route of electric cable trench per IFC drawings. 3 All existing services shown either on these drawings or on record drawings shall be

located and identified by an EPC Contractor approved method (i.e. catscan)4 Wherever necessary, trial pits shall be manually excavated to expose existing services.



Chapter 3 Excavations & Crossings5 Wherever, protection of existing services, are required, adequate protection and warning

shall be installed. 6 Cables or pipes that span excavation shall be supported. 7 Rigid ducts and trays shall be provided to protect and support these cables. 8 All existing services encountered, shall be plotted by surveyor on as built drawings.9 Trench shall be excavated by a track excavator to correct lines and levels. 10 Wherever necessary or as defined on work permit, manual/hand excavation shall be

carried out.11 Sides of excavation shall be sloped, so as to avoid possible subsidence. 12 Barriers shall be placed allover to indicate an open excavation. 13 Excavated material shall be stockpiled along trench areas for reuse/preferably removed to

stockpiles, if not suitable for reuse. 14 Surplus material shall be removed to tip area by dump trucks for screening. 15 Surveyor shall monitor lines and levels of excavation activity.16 Upon EPC Contractor inspection, excavated trench shall be released for next operation as

indicated upon activity ITP following which, compaction of formation level be carried out to specified density

17 Field compaction test report shall be submitted to engineer for approval & records. 18 Surveyor shall provide suitable level pins that indicate correct elevation of sand bedding

required for cables. 19 Sand bedding shall be laid and compacted in accordance with specification. 20 Cables shall be placed correctly within trench in line with IFC drawings. 21 Cables shall be laid by electrical department upon completion of which, EPC

Contractor/Engineer release trench for backfill and subsequent activities. 22 Suitable approved backfill material shall be placed in layers, compacted around cable &

field tested. 23 Cable tiles and warning tape shall be placed on top of sand fill per approved drawing.24 This backfill activity shall continue up to existing ground level & site left tidy 25 For construction of duct banks, duct pipes shall be laid according to sectional design

details with fixing arrangements, forms erected to required profiles. 26 Concrete shall be poured at various intermediate locations in first instance to create

temporary downward anchor to counteract possible duct uplift by under ducts fluid concrete upward pressure.

27 When arrangement is completed, whole section be concreted to defined level & finished accordingly.

Major Equipment1 Cable Markers/Excavation tracking equipment/Dump trucks/Compactors/Concrete

pouring equipmentAttachment

1 NoneMS8

Hand excavation to install telephone ducts between Box # 20 to telecom centre



Chapter 3 Excavations & CrossingsIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/ Manpower/Attachment

Scope 1 This statement is aimed to propose procedures to be adopted to carry out laying 2 #s 4”

dia. PVC ducts for telecommunication cables over existing ducts between Box # 20 to telecom centre

References1 Drawing #s not indicated2 Specifications- Excavation & Backfilling for Underground structures.





















Responsibilities in addition to foregoing general description1 S shall accurately plot and record all as built marks respecting bedding, telephone duct

route, duct elevation, possible control references & finished ground elevations.2 SE shall ensure that excavation is rightly carried out in all respects in line to drawings &

specification & in compliance with all safety procedures.3 SO shall ensure that excavations are safely carried out.4 PSM shall ensure that validity of permit to work is in force, until involved works are

completed










9 All persons available upon site shall wear PPE issued to them.



Chapter 3 Excavations & Crossings10 Where possible, hazards may arise from excavation activities, necessary safety measures



is commenced with










Status of site location1 Site is located at police station, where 2 # manholes MH2 and MH3 exist2 Manholes centre to centre distance is 141 m. 3 Proposed section to be excavated is 500mm wide and 1000 mm deep. 4 Additional/spare 2 # PVC ducts 4” dia. require to be provided above existing ducts5 Access road to police station is wearing asphalt course 6 From manhole # 3 to # 2 i.e. 141m is running underground police station car park and

access road. 7 Main portion of line in middle as shown, is access road and parking facility for police

station



Chapter 3 Excavations & Crossings8 Internal portion of line from manhole #2 to internal Telecom Vault is also, running

beneath interlocking blocks paving, after crossing under fence wall

MethodWork shall involve following operational procedures. Between manhole # 3 and # 2

1 Remove interlocking blocks 2 Road cutting at police station entrance across 500 mm width or as required3 Bridge gap at road cut using steel plates to facilitate smooth traffic plying/movement 4 Manual excavation of trench in entire 141 m length to be carried out5 Sand bedding 75 mm to be placed6 Install 2 #s 100 mm dia. pipe ducts7 Sand filling over ducts 75 mm to be made8 Backfilling as specified to be carried out9 Re fixing interlocking tiles to original location to make good10 Making good access road 11 Removing steel plates from temporary bridge

Between manhole # 2 and internal telecom vault1 Removing interlocking blocks2 Manual excavation of trench to existing ducts from manhole #2 to internal vault crossing

below fence wall3 Sand filling 75 mm thick below proposed duct4 Laying ducts 5 Filling 75 mm thick sand over laid ducts6 Entering cable way7 Making good entry8 Backfilling as specified9 Re fixing interlocking blocks to match pattern10 Clearing site

DetailsExternal

1 Existing interlocking paving tiles shall be removed to a safer location from required work area and stacked properly

2 Access road shall be cut across to required level, exposing existing ducts and bridging steel plates be laid over completely to facilitate car access

3 Manual excavation shall be carried out in entire length of 141m to given sectional dimensions, up to existing ducts as shown

4 After excavation to required depth is completed, a 75 mm thick layer of sand shall be filled in, on existing ducts to receive 2 #s 4” dia. new ducts, which be placed and further covered with another 75 mm thick sand layer

5 After sand is filled in, backfilling shall be carried out, inline/according to project specifications up to bottom of interlocking blocks to be re fixed

6 After backfilling is completed, interlocking blocks shall be re fixed to same location or pattern, which existed before these were removed.



Chapter 3 Excavations & Crossings7 Backfilling shall be done in road cut part, up to concrete bottom and asphalt laid over8 After whole backfilling is over, effected access road shall be made good by asphalt laying

on concrete base

Internal1 Interlocking blocks shall be removed from proposed marked route, stacked well and safe

to be reused2 Excavation shall be carried out on entire length from fence to existing vault3 Excavation shall be carried out from manhole # 2 to inside of wall penetrating beneath4 Whole route of existing ducts shall be exposed5 Sand shall be filled in 75mm thickness over existing ducts6 Spare ducts 2 #s shall be laid over sand filling over existing ducts 7 Further sand filling 75mm thick shall be carried out to cover new ducts and backfilling be

commenced to bottom of existing interlocking pavement, inline/according to specifications

8 After backfilling is over, interlocking blocks shall be re fixed to existing pattern and effected wall portion be repaired to extent of damage, if any

9 External portion from wall to manhole shall also, be sand filled and backfilled inline/according to details

10 Whole work shall be approved

Equipment1 Jackhammer/Compressor

Attachment1 Sketch

MS9Excavation cooling water outfall chamber

IndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/ Manpower/Attachment

Scope 1 This statement is aimed to present proposed procedures to be adopted to carry out

excavation for foundation in respect of Cooling Water Outfall Chamber.

References1 Drawing 2 Specification Excavation & Backfilling for Underground structures

Definitions1 PSM Project Site Manager2 CSM Construction Site Manager3 CS Construction Superintendent/Project Supervising Engineer 4 IS Infrastructure Superintendent5 SE Site Engineer



Chapter 3 Excavations & Crossings6 GE Geotechnical Engineer7 SO Safety Officer8 GFM General Foreman9 FM Foreman10 QC Quality Control11 S Surveyor12 PPE Personal Protective Equipment

















Responsibilities in addition to foregoing general description



Chapter 3 Excavations & Crossings1 PSM to provide in case, dewatering is required, pumping systems shall be installed

meeting in line to excavation profile2 S shall accurately plot and record all as built marks respecting existing ground levels,

formation, bedding & possible control references.3 SE shall ensure that excavation is rightly carried out in all respects in line to drawings &

specification & in compliance with all safety procedures.4 SO shall ensure that excavations are safely carried out.5 SO shall ensure that equipment operators comply with safe procedures




recognized by industry/OSHA etc.4 Only, specifically approved mechanical equipment/third party certified, whilst locating







is commenced with




Design Status1 Centre lines of proposed structure and coordinates meet at N (Typ) and E (Typ)2 Plan size of chamber is 10.025 m x 7.2 m3 Excavation has to be carried out to +2.3 m level from RGL +10.500 i.e. a depth of 7.8 m

shall be excavated




Method (sketch # 19)Excavation shall be carried out to following sequences

1 Setting out lines2 Barricading area3 Excavation in stages, as shown on sketch

DetailsAttached sketch

1 To start with, a surveyor shall set out site for excavation to exact lines and coordinates references.

2 After setting out, excavation lines shall be marked 4750 mm away from proposed external faces of structure, as shown on sketch.

3 Excavation shall be carried out to details shown on sketch in 5 steps of size 750 mm tread and 1500mm riser and bottom step of 675 mm riser.

4 Size of lowest level excavation shall be 12025 x 9200 mm and that of top 19525 x 16700 mm.

5 Excavation shall be started from one end and top 750 mm deep be completed6 Access shall be ramped for equipment to enter.7 Excavation shall be carried out in strips of 750 mm depth, until whole earth mass is taken

out.8 Excavated earth shall be transported to stockpiles immediately, keeping site tidy.

Equipment

1 Excavator/DumperAttachment

1 Sketch MS10

2#s road crossings for laying 1# 14” desalinated water/1# 8”potable water

&1# 20” raw ethane/1# 8” natural gas/1# 6” propane

avenue ‘c’ @ fire stationIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment

Scope1 This statement is aimed to propose procedures to be adopted to carry out excavation at

road crossings to construct culverts to facilitate laying pipe lines 2 1 # each 14” Desalinated water, 8” Potable water and 3 1 # each 20” Raw Ethane, 8” Natural Gas and 6” Propane 4 At locations identified on attached drawing pertaining to avenue C/First Street Road

Crossing at existing Fire Station



Chapter 3 Excavations & CrossingsDefinitions


















Chapter 3 Excavations & Crossings17 SO shall ensure that all safety requirements are complied with/met by site personnel18 EPC Contractor shall conduct surveillance over all ongoing activties all days as well as


Responsibilities in addition to foregoing general description1 S shall accurately plot and record all as built marks respecting existing ground levels,

formation, bedding, pre cast members & possible control references.2 SE & SO shall ensure that traffic diversion works well from safety viewpoint3 SE shall ensure that excavation is rightly carried out in all respects in line to drawings &

specification & in compliance with all safety procedures.4 SO shall ensure that excavations are safely carried out.5 SO shall ensure that equipment operators comply with safe procedures6 SO shall ensure that all safety measures are effected, while works are being carried out in

trench from ground7 PSM/CS/SE/SO shall ensure that pre cast members handling operations are effected in

line to standards8 PSM shall ensure that validity of permit to work is in force, until involved works are

completed
















Chapter 3 Excavations & Crossings13 Scanning of existing services shall be conducted by suitable methods prior to excavation

is commenced with










Flagman1 On all directions, in addition to traffic sign boards, flagmen shall be engaged to operate

full time to direct traffic about ‘excavation work in progress’ by waving ‘flag signal’ for all vehicles passing by




out/egress of trench.



Chapter 3 Excavations & Crossings2 No jumping shall be allowed








2 Only English literate Foreman shall be employed to work on excavation execution.

Traffic Management1 Sign boards keep up-All personnel shall be briefed about safe keep up of sign boards2 Barricades, cones, markers and night lights, flood lights etc. shall be arranged as required

for a complete safety.3 No oil spillage shall be allowed. 4 Sides of excavation shall be sloped with barriers placed on, to indicate excavation work

in progress

Deep Trenches1 Since, proposed excavation is considerably wide and deep, all safety measures shall be

resorted to and if required, shoring shall be provided to prevent caving in. 2 Trench depth being more than 1200 mm, adequate means of exits, such as either


Existing Services1 2 # electric poles and other various categories of about 8 to 10 # running services ducts,


Precast members1 Since, precast culvert units, covers and sleepers are heavy in load, proper care has to be

exercised during raising & downing (handling) to exact locations strictly adhering to relevant safety measures




Method (sketch # 17)1 Required permit to work shall be obtained from Plant Refinery Division.2 Record drawings regarding existing services shall be obtained.3 A traffic management scheme shall be produced as detailed on attached sketch 4 Drawing reference Piping Interconnections Road Avenue ‘C’:

Existing Services 1 One serving electric pole is located away from crossing towards North2 Minor irrigation/hoses exist to irrigate central verge plantation3 Street lighting electric cables exist & some minor plants also, growing on central verge.4 Road shall be excavated in two instances by diverting traffic on either lane, completing

one after other, as shown on traffic management scheme

Procedures1 Traffic management scheme shall be implemented effectively2 Existing services from central verge shall be diverted or protected, as required and

directed by competent concerned authority

Instance 11 Asphalt and central verge pertaining to crossing portion Stage-1 shall be removed 2 Hand excavation shall be carried out to expose cables & other services, employing

seaming area with detectors to discover locations pertinent to existence of electrical cables

3 After exposure, all cables shall be covered with split PVC pipe & well supported temporarily, to continue excavation mechanically

4 Remaining portion of trench shall be excavated by machine to defined levels5 Preparation of trench to construct RCC culverts shall be carried out 6 Construction pertaining to pipe carrying culverts, including laying of pipe sleepers

anchored with standard dowels, covers, fixing steps etc. shall be carried out according to drawings and approved procedures using precast RCC units/members

7 Activities involved for construction of culvert8 Setting out lines for excavation & approvals9 Removal of asphalt using mechanical means10 Hand excavation for areas possibly running underground services11 Machine excavation following protection of services to formation level12 Compaction of formation & preparation for concrete laying on polythene sheeting in soil

contact13 Application of waterproofing/concrete protection on blind concrete14 Setting out lines for precast culvert section offloading to locations15 Transporting culverts sections to site & offloading to locations followed by fixing &

grouting joints if separate units16 Application of above ground protection to concrete surfaces17 Diverted services shall be reinstated18 In addition, one access box out at end shall be provided to design details19 Inspections shall be conducted to requirement



Chapter 3 Excavations & Crossings20 Backfilling up to road formation shall be carried out inline/according to specifications21 Broken asphalt portion shall be made good using new asphalt

Instance 21 Aforesaid activities shall be repeated for this instance for crossing portion Stage-22 Central verge shall be made good & diverted services reinstated3 Traffic management scheme shall be removed after road crossing is cleared of all debris

and obstructions.4 75mm dia. holes in precast units meant for lifting, shall be filled with concrete5 Access box out shall be closed with concrete, after pipes are laid 6 Either side of road shall be provided with cable markers to indicate services7 8 mm galvanized removable chequered covers plates with 2# lifting handles shall be

provided to design details. 8 Other chequered plates shall be provided to design details

Major Equipment1 Excavator, Dumper trucks, Compactors. Jack Hammer, Compressor, Asphalt finisher,

Road RollersAttachment

1 Sketch showing traffic management scheme MS11

Road crossing for laying 84”GRE pair seawater cooling lines @ avenue ‘d’/corniche Junction


Scope1 This statement is aimed to propose procedures to be adopted to carry out excavation at

road to facilitate to lay pipelines 1 # pair 84” GRE seawater cooling supply lines at avenue ‘D’ and ‘corniche road’ junction identified on attached drawing to following references

Reference documents1 Specification Excavation & Backfilling for Underground structures2 Drawing # not indicated 3 Piping Interconnection Drawings- Seawater Cooling Supply Lines

Definitions1 PSM Project Site Manager2 CSM Construction Site Manager3 CS Construction Superintendent/Project Supervising Engineer 4 IS Infrastructure Superintendent5 SE Site Engineer6 GE Geotechnical Engineer7 SO Safety Officer



Chapter 3 Excavations & Crossings8 GFM General Foreman9 FM Foreman10 QC Quality Control11 S Surveyor12 PPE Personal Protective Equipment


















formation, bedding, pre cast members & possible control references.2 SE & SO shall ensure that traffic diversion works well from safety viewpoint



Chapter 3 Excavations & Crossings3 SE shall ensure that excavation is rightly carried out in all respects in line to drawings &


trench from ground7 PSM/CS/SE/SO shall ensure that pre cast members handling operations are effected in

line to standards8 PSM shall ensure that validity of permit to work is in force, until involved works are

completed
























Excavation Work Permit-1 A copy of ‘work permit’ shall be posted on a mini board installed on site to be noticeable




full time to direct traffic about ‘excavation works in progress’ by waving ‘flag signal’ for all vehicles passing by




out/egress of trench. 2 No jumping in to trench shall be allowed




Machine Excavation



Chapter 3 Excavations & Crossings1 Operators/drivers shall be explicitly instructed to abide by requirement of reverse signal





Excavation Work Permit1 A copy of work permit shall be posted on a mini board installed on site to be noticeable

to all relevant persons involved on crossing


for a complete safety. 3 No oil spillage shall be allowed. 4 Sides of excavation shall be sloped with barriers placed on, to indicate excavation work

in progress




Existing Services1 # electric poles and other various categories of about 8 to 10 # running services ducts,


Method (sketch # 20/18)1 Required permit to work shall be obtained from Plant Refinery Division.2 Record drawings regarding existing services shall be obtained.3 A traffic management scheme has been presented herein and shall be produced on site as

detailed on attached sketch for this road crossing, which includes ‘reduced speed’ sign, temporary diverted’ roads sign, ‘men at work’ sign, ‘warning’ signs, ‘informatory’ signs, ‘safety barriers’, night lighting and road cleaning activities etc.

4 Traffic management scheme shall be reviewed and approved by EPC Contractor prior to commencing work.

5 Aforesaid traffic management scheme shall be implemented as described below:



Chapter 3 Excavations & CrossingsTraffic management scheme road crossing Corniche Road/Avenue ‘D Junction’Drawing reference-Not indicated

1 This proposed crossing is located on Road Avenue ‘D’ between following Coordinates as shown on referred drawing.

2 Avenue ‘D’ is a 2 way road carrying single lane on either way3 Corniche road is a 2 way road with a central verge, carrying 2 lanes on either way on

West direction and without a central verge, but single lane on Eastern direction.4 3 # serving electric poles are located 1# at curve and 2# on Northern central verge, which

shall be effected by proposed excavation, because of encroachment on verge. 5 Central verge partly, an island partly, fixed with guardrails fully about 30 m with

channels shall be effected. 6 Corniche street sign board, Kerbstones shall all be effected by construction of proposed

road crossing7 Road shall be divided in 2 parts as shown on sketch as L1 and L 2 on either side of

carriageway.8 In first instance, work shall be carried out on part L1 diverting traffic to road portion on

part L2 as shown on sketch.9 In second instance, work shall be carried out on part L2 diverting traffic to road portion

on completed road portion on part L1 as shown on sketch.10 Second instant shall be commenced only when first has been completed and traffic can

ply11 Directory signboards shall also, be placed on 1ststreet road East/West on both ways to

indicate work at crossing12 For traffic on both roads at ‘3’ locations both ways, first depicting ‘reduce speed’ for

traffic diversion informatory board shall be located at 300 m from point of proposed crossing, second depicting ‘diversion’ signs be located at 200 m and third, depicting ‘men at work’ sign be located at 100 m on either way on opposite directions.

13 A Flagman shall be engaged full time on both directions to guide traffic about ongoing excavation operations in addition to conventional signboards

Following activities are involved to produce Traffic Diversion Management Scheme1 Excavate by hand and expose all underground facilities2 Various types of electrical, telecom and other services are running below and near

proposed crossing3 Excavate trial pits in size 5mx2mx1.5m deep by hand tools4 Seam area with detectors to ascertain access to cable5 Expose cable fully and to be inspected by authorities/Operating Authority6 After exposure of existing services, all cables to be covered with split PVC pipe to

continue excavation mechanically, inline/according to authority directions/as agreed7 Excavate remaining portion by using excavator machine8 Have authority inspection conducted9 Fill bedding material according to specification requirement10 Pipes shall be laid to set out lines & levels11 Conduct testing of pipes inline/according to testing procedures12 Backfill in layers to required levels13 Reinstate diverted services



Chapter 3 Excavations & Crossings14 Reinstate central verge to existing state15 Reinstate corniche road board and metallic rail guard

Details1 Traffic Management Scheme shall be executed as explained in foregoing complying with

traffic manual provisions/directions.2 First section of proposed road crossing per attached sketch shall be marked by surveyor

on actual location. 3 All existing services shall be identified from Record drawings as well as, by

digging/hand/manual excavation with measures to protect or divert temporarily resorted to, inline/according to regulations.

4 Asphalt shall be cut using jackhammers5 Road section shall be excavated to existing cables manually, for which trial pit may be

made prior to full manual excavation is proceeded6 After ascertaining safe procedures, exposures shall be completed.7 After exposure of cables, Operating Authority officials shall inspections/instructions,

consequently, cables shall be either directed or protected accordingly, following which, remaining machine excavation be carried out to specified levels

8 Excavated material shall be removed from site to stockpile area.9 Excavated trench shall be inspected by authorities as required.10 Appropriate bedding material shall be placed within excavated trench to correct service

level. 11 Where required, this bedding shall be compacted and tested.12 GRE pipes shall be laid by, inline/according to agreed procedures/manufacturer’s

instructions.13 Alignment & testing shall be conducted in conformance to specification requirements 14 Backfill around service pipes shall be carried out including appropriate material. 15 Service pipes surrounding material shall be compacted per project specification

requirements. 16 Test results shall be provided for specification conformance verification.17 Existing live services, which were either diverted or protected, shall be reinstated

accordingly.18 General fill up to underside of road formation shall be placed in 150mm compacted

layers using mechanical methods to meeting specification requirements.19 A concrete slab shall be cast up to bottom of finished asphalt level.20 Finishing shall be carried out including approved asphalt mix.21 Traffic management system shall be removed, after road crossing has been cleaned of all

debris/&/ or obstructions.22 Either side of road Xing shall be provided with markers to indicate live services

Major Equipment1 Excavator, Dump trucks, Compactors, Jack Hammer, Compressor, hydro jetting

(depending on necessity)Attachment

1 Sketch showing traffic management scheme 2 Drawings including traffic diversion




MS12 Road crossing to make good wearing course over completed

1# for 14” desalinated water & 1# for 8”potable wateravenue ‘c’


Scope1 This statement is aimed to propose procedures to be adopted to carry out to making good

wearing course over completed road crossing to facilitate smooth traffic plying.2 Pipe lines 1 # each 14” Desalinated water and 8” Potable water at locations identified on

attached drawing for this Xing were completed to following references

Reference documents1 Specification- Excavation & Backfilling for Underground structures2 Drawing # Easement Systems Avenue ‘C’3 Piping Interconnection Drawings, Avenue ‘C’







and this method statement.



Chapter 3 Excavations & Crossings7 SE shall be responsible for all site activities and follow instructions of CS/CM8 Whatever, mishap on excavation operation shall immediately, be notified to CS and CM














trench from ground7 PSM shall ensure that validity of permit to work is in force, until involved works are

completed including asphalt work at a later stage after concrete slab is finished





activity commences.



Chapter 3 Excavations & Crossings5 In this case, excavation has to be carried out on Operating Authority area therefore all

















to all persons involved



Chapter 3 Excavations & Crossings2 Barricades cones, markers, night lights and floodlights etc. shall be installed as required






Access to trench1 Workers shall clearly be instructed to use only ladders, whether to enter in/ingress or

come out/egress of trench. No jumping shall be allowed












for a complete safety. 3 No oil spillage shall be allowed.



Chapter 3 Excavations & Crossings4 Sides of excavation shall be sloped with barriers placed on, to indicate excavation work

in progress




Method (sketch # 18 just indicative)1 Required permit to work shall be obtained from Plant Refinery Division.2 A traffic management scheme has been presented herein and shall be produced on site as

detailed on attached sketch for this road crossing, which includes ‘reduced speed’ sign, ‘temporary diverted roads’ sign, ‘men at work’ sign, ‘warning’ signs, ‘safety barriers’, night lighting and road cleaning activities.

3 Traffic management scheme shall be reviewed and approved by EPC Contractor prior to commencing work and agreed with Plant Refinery Division.


Traffic management scheme road crossing – first street/avenue ‘c’1 Drawing reference

This completed crossing is located on Road Avenue ‘C’ between following Co-ordinates as shown on referred drawing.

1 This is a 2 way road with a central verge and carrying 2 lanes on either way2 Proposed crossing is located about 60 m from 1ststreet road towards North3 One serving electric pole is located away from Xing to North4 Minor irrigation/hoses are lying disconnected5 Some minor trees and plants are growing/hortricultured on central verge.6 Road shall be divided in 2 parts as shown on sketch as lane L1 and L 2 on either side of



on completed road portion on part L1 as shown on sketch.9 Directory signboards shall also, be placed on 1ststreet road East West on both ways to

indicate work at crossing10 For traffic North to South, first ‘reduce speed’ for traffic diversion informatory board

depicting, shall be located at 300 m from point of proposed crossing, second depicting ‘diversion’ signs be located at 200 m and third depicting ‘men at work’ sign be located at 100 m on either way in opposite directions.

11 For traffic South to North, past crossing one sign shall be placed to direct for diversion, to ‘slow down’ and ‘men at work ahead’

12 A Flagman shall be engaged full time on both directions to guide traffic about ongoing excavation operations in addition to conventional signboards



Chapter 3 Excavations & Crossings13 Following activities are involved. (Reference to marked note ‘B’ on Easement Systems

Drawing) 14 To produce Traffic Diversion Management Scheme15 To excavate mechanically, loose wearing portion to a depth, so that a total concrete

thickness of 70 mm is poured16 To have authority inspection for approval17 To pour concrete as required18 To reinstate central verge to existing/original state

Details1 Traffic Management Scheme shall be executed as explained in foregoing and to traffic

manual indicated directions.2 First section of proposed road crossing per attached sketch shall be marked by surveyor

on actual location. 3 Debris/asphalt shall be cut using jack hammers or grader to required levels, so that a final

concrete thickness 70mm be conveniently poured4 Excavated material shall be removed from site to stockpile area.5 Excavated trench shall be inspected by authorities as required.6 A concrete slab shall be cast up to bottom of finished asphalt level.7 Traffic management system shall be removed after road crossing has been cleaned of all

debris or obstructions.8 Either side of road shall be provided with cable markers to indicate running services9 Work of wearing course asphalt level shall be carried out later, when plat resumes

production, which stage require reprocessing all methods as effected for concrete slab laying

10 Traffic diversions shall be effected to carry out laying asphalt course to requirement, inspections conducted & site cleared for permanent traffic use

Major Equipment1 Grader, Excavator, Dump trucks, Compactors, Jack Hammer, Compressor,

Attachment1 Sketch showing traffic management scheme

MS13 Road crossing to make good (temporarily)

wearing course over completed 132 kv electric cable avenue ‘c’


Scope1 This statement is aimed to propose procedures to be adopted to carry out making good

wearing course over completed road crossing to facilitate smooth traffic plying. 2 Laying of 132 KV electric Cable at location identified on reference drawing for this Xing

has been completed




Reference documents1 Specification- Excavation 2 Drawing #












12 GFM shall also, ensure that required equipment are available on sites during activities13 GFM shall everyday report all actions to CM/CS & Engineers



Chapter 3 Excavations & Crossings14 FM shall execute operations deploying workforce & explain in full in language, work









trench from ground












11 This may include provision of signage, barriers, watchman and night lighting.



Chapter 3 Excavations & Crossings12 When, traffic is required to be diverted for requirement to cross some road, permit to
















Access to trench



Chapter 3 Excavations & Crossings1 Workers shall clearly be instructed to use only ladders, whether to enter in/ingress or

come out/egress of trench. No jumping shall be allowed












for a complete safety. 3 No oil spillage shall be allowed. 4 Sides of excavation shall be sloped with barriers placed on, to indicate excavation work

in progress




Method (sketch # 18 just indicative/20)1 Required permit to work shall be obtained from Plant Refinery Division.2 A traffic management scheme has been presented herein and shall be produced on site as

detailed on attached sketch for this road crossing, which includes reduced speed sign,



Chapter 3 Excavations & Crossingstemporary diverted roads sign, ‘men at work’ sign, warning signs, safety barriers, night lighting and road cleaning activities.

3 Traffic management scheme shall be reviewed and approved by EPC Contractor prior to commencing work and agreed with Plant Refinery Division.


Traffic management scheme road crossing – first street/avenue c’1 This crossing is located about 83 m from center line of 1st street road towards North2 Road shall be divided in 2 parts as shown on sketch as lane L1 and L 2 on either side of



on completed portion on part L1 as shown on sketch.5 Signboards shall be positioned as shown on sketch6 A Flagman shall be engaged full time on both directions to guide traffic about ongoing

excavation operations in addition to conventional signboards7 Temporary stone surface on lane L1 shall be excavated to a depth of 70mm and replaced

by mass concrete to level with adjacent asphalt. 8 Traffic shall be allowed on to concrete after 2 days and operation shall be repeated for

lanes L2 9 All excavated material shall be removed to an approved tipping area. 10 Concrete surface shall be replaced by asphalt to same specification as existing

construction at an earliest opportunity

Major Equipment1 Grader, Excavator, Dump trucks, Compactors, Jack Hammer, Compressor,


MS14 Black top repair Ist street between avenue c & b


Scope1 This statement is aimed to propose procedures to be adopted to carry out repair to road

wearing course damaged superficially to a portion on Ist Street between Avenue ‘c’ and Avenue ‘d’.

Reference documents1 None

Definitions1 Refer to MS 13 & 12 for respective section




Responsibilities1 Refer to MS 13 & 12 for respective section excluding trenching activity, which is not

required on this statement2 Only, responsibilities connected with traffic diversion management & working on asphalt

wearing course apply

Safety1 Refer to MS 13 & 12 for respective section excluding trenching activity safety, which is

not required on this statement2 Only, safety connected with traffic diversion management & working on asphalt wearing

course apply

Materials1 Tack coat bituminous material 60/100 penetration to be applied @ 2.5 litres per sqm of

road surface2 Asphalt for 40mm thick course according to requirement 3 Water for work

Method (sketch # 18 just indicative/20)1 Traffic diversion, if so required shall be effected to requirement2 Damaged portion of ‘wearing course’ shall be removed using ‘Asphalt Remover’ and

surface cleaned using a ‘Mechanical Cleaner’3 Tack coat shall be applied to ‘clean/clear surface’ according to/conforming to specified

rate of application as indicated in foregoing4 Asphalt shall be applied to a required thickness (minimum 40 mm) finished to full extent

of damaged area, making up level to existing wearing course 5 Laid material shall be spread and finished to required level using Asphalt Finisher 6 First rolling shall be carried out using pneumatic roller ‘6’ tonne capacity, giving required

number of passes7 Then second rolling shall be carried out using Tandem roller 8/18 tonnes capacity in line/

according to meeting requirement giving required number of passes.8 Water shall be used during rolling according to requirement of keeping roller wheels

clean9 Civil Contractor QC inspection shall be conducted to ascertain correct finished level10 After approval of works, site shall be cleared of all debris & dirt11 Road diversion management shall be removed from location.

Major Equipment1 Asphalt Remover/Asphalt Finisher/Pneumatic Roller/Tandem Roller/Water Tank

Attachment1 None

MS15 Fire water line excavation around consumer receipt station





Scope1 This statement is aimed to propose procedures to be adopted to carry out excavation for

Fire Water Lines to be laid by EPC Contractor around Consumer Receipt Station. 2 Method Statement for part of road crossing shall be submitted separately

Reference documents1 Specification Excavation & Backfilling for Underground installations2 Interconnects underground layout drainage Sheet …….

Responsibilities1 Refer to MS 13 & 12 for respective section

Safety1 Refer to MS 13 & 12 for respective sections related to excavation safety described within

all contents up to Method, which is included in followings

Method (sketch # 18 just indicative/20)1 Required permit to work shall be obtained from competent authority/operator/Plant

Refinery Division.2 Record drawings regarding existing services shall be obtained.3 A traffic diversion management scheme shall be produced on site, as detailed on attached

sketch 4 Supervision at workface must have a copy of permit to work, drawing and method

statement5 Attached sketch shows location of proposed Fire Water Line and existing Natural Gas

pipe. 6 All existing services shown on record drawings shall be located, identified & protected

adequately with warning as required 7 Cables or pipes that span excavation shall be supported using split ducts and trays 8 All existing services encountered shall be plotted by surveyor on ‘as built’ drawing9 Surveyor shall setout routes of proposed 8”dia firewater line trenches conforming to IFC

drawings and to sections shown on attached sketch, keeping a clear level difference between existing natural gas and proposed firewater line 1000mm, which shall also, be applicable between existing 132 KV cable and proposed firewater line

10 Where necessary or as defined on work permit, hand excavation shall be carried out11 When cable markers have been exposed, work shall be temporarily suspended and an

evaluation made about soil conditions. 12 This evaluation shall be conducted by EPC Contractor Superintendent and operations’

representative. 13 Where necessary, a revised method statement respecting work may be necessary to be

defined or charted out. 14 In this instance, all personnel shall be briefed about decision made for method statement.15 Cables shall be protected by fitting split sleeves after exposure as existing services



Chapter 3 Excavations & Crossings16 Excavator shall be used for excavation of route to correct lines and levels complying with

specification requirement providing benching, where necessary and employing all safety means.

17 Barriers (including warning tape) shall be placed/installed to indicate an open excavation18 Excavated material shall be transported to stockpiles in agreed areas for screening &

reuse. 19 Surplus material shall be removed to tip area using dump trucks. 20 Surveyor shall monitor lines and levels of excavation operation21 Exposed (Existing) cables and pipelines shall be checked for damage by EPC Contractor

supervision and combined inspection shall be conducted by Engineer/EPC Contractor and Civil Contractor.

22 Operation department shall be invited to attend all such significant inspections regarding damages.

23 Engineer/EPC Contractor engineer shall approve suitability of formation material by inspecting trench bottom/formation and after approval is obtained, compaction of formation level shall be carried out.

Following activities are explained only for information1 Specified compaction tests shall be conducted and results reported accordingly, for

approvals2 Surveyor shall provide level pins to indicate correct elevation of bedding required for 8”

Firewater line. 3 Bedding shall be laid, compacted, tested and results reported accordingly. 4 Firewater pipes shall be placed correctly within trench between marked lines by EPC

Contractor (not Civil Contractor) in accordance with EPC Contractor own method statements.

5 Upon acceptance of pipe installation, laid pipes shall be surrounded with further bedding material that shall be compacted using suitable equipment, tested and reported

6 Approved backfill material shall be spread uniformly, in layers 150 mm thick up to existing ground level, compacted to specification requirement, tested & reported accordingly

7 Site shall be left tidy of excavated and backfill material

Major Equipment1 Excavator/Dump Truck/Compactor

Attachment1 Sketch and drawing extract depicting proposed excavation route

MS16Road crossing for laying

1# pipe for 20” raw ethane 1# pipe for 6” propane first street





Scope1 Statement is aimed to propose procedures to be adopted to carry out excavation at road

crossings to construct culverts to facilitate laying pipe lines 2 1 # each 20” Raw Ethane and 6” Propane 3 @ location identified on attached drawing pertaining to First Street



all contents up to Method, which is included in followings after safety description respecting Pre cast members

Precast members1 Since precast culvert units, covers and sleepers are heavy in load, proper care has to be

exercised during raising and downing (handling) to exact locations, strictly adhering to relevant safety measures

2 Proper calculations require to be computed for exact members weight assessment professionally, so as to procure competent & consistent hoisting equipment

Method (sketch # 17 just indicative/18/20)1 Required permit to work shall be obtained from competent authority/operator/Plant


sketch 4 Drawing reference – Piping Interconnections F Street

Existing Services 1 Cables exist on north side of proposed crossing already exposed2 Road shall be excavated in one instance by diverting traffic on north side as shown

Procedures1 Traffic diversion management scheme shall be implemented effectively2 Both crossings shall be excavated in one instance together3 Asphalt pertaining to crossing portion shall be removed using mechanical equipment 4 Hand excavation shall be carried out to expose cables & all other services if some

possibly, employing seaming involved area with detectors to discover existence of cables 5 After exposure of existing services, all cables shall be covered with split PVC pipe and

well supported temporarily, to continue excavation mechanically 6 Remaining portion of trench from level where, manual excavation stopped, shall be

excavated by machine to defined bed or formation levels7 Preparation of trench to construct RCC culvert shall be carried out



Chapter 3 Excavations & Crossings8 Construction pertaining to pipe carrying culvert including laying of pipe sleepers

anchored with standard dowels, covers, fixing steps etc. shall be carried out according to meeting details on drawings and approved procedures using precast RCC units/members

Construction of culvert includes following specific activities1 Remove or demolish all asphalt concrete from road surface2 Ensure by hand excavation about existing services, should there be certain.3 Follow all sequences as explained about excavation in foregoing paragraph4 Removal of all loose soil from formation5 Testing soil bearing capacity if not tested earlier6 Compaction of existing soil formation & conducting FDD7 Setting out lines & levels to exact requirement 8 Isolation of formation soil by spreading polythene sheet all over culvert area9 Laying blinding concrete meeting to requirement10 Application of concrete protection on blinding for structural concrete of precast members11 QC inspections respecting blinding concrete12 Marking locations on concrete protection membrane about setting out lines for precast

concrete members, so that these could be offloaded & placed directly from mobile crane13 Transportation of precast members from precast yard to site location using flat bed trailer14 Stationing mobile crane at convenient locations to cover all off loadings15 Offloading all precast members on site locations directly on setout marks16 Grouting joints of all precast members, should they be many or otherwise, just place

culvert once.17 In addition, one access box out on both ends shall be provided meeting to design details18 Diverted running services shall be reinstated satisfactorily19 Inspections shall be conducted to requirement20 Backfilling up to road formation shall be carried out according to meeting specifications21 Broken asphalt portion shall be made good using new asphalt concrete22 Traffic diversion management scheme shall be removed, after road crossing is cleared of

all debris and obstructions.23 75 mm dia. holes in precast units meant for lifting shall be filled in with concrete24 Access box out shall be closed with concrete, after pipe are laid 25 Either side of road shall be provided with cable markers to indicate running services26 8 mm galvanized removable chequered plate covers with 2 lifting handles shall be




1 Sketch showing traffic management scheme




2 #s road crossings for laying 1 for 20” raw ethane/1 for 8” natural gas/1 for 6” propane

&1 for 14”desalinated water/1 for 8” potable water

Avenue dIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/AttachmentScope

1 This statement is aimed to propose procedures to be adopted to carry out excavation at road crossings to construct culverts to facilitate to lay pipe lines

2 1 # each 20” Raw Ethane, 6” Propane & 8”Natural Gas3 1# each 14” Desalinated Water and 8” Potable water 4 @t locations identified on attached drawing pertaining to Avenue D







Method (sketch # 17/18/20 just indicative)1 Required permit to work shall be obtained from competent authority/operator/Plant


sketch 4 Drawing reference –Piping Interconnections 5 Avenue D - Culvert

Procedures1 Traffic diversion management scheme shall be implemented effectively2 Both crossings shall be excavated in one instance together3 Asphalt pertaining to crossing portion shall be removed using mechanical equipment



Chapter 3 Excavations & Crossings4 Hand excavation shall be carried out to expose cables & all other services if some

possibly, employing seaming involved area with detectors to discover existence of cables 5 After exposure of existing services, all cables shall be covered with split PVC pipe and

well supported temporarily, to continue excavation mechanically 6 Remaining portion of trench from level where, manual excavation stopped, shall be

excavated by machine to defined bed or formation levels7 Preparation of trench to construct RCC culvert shall be carried out 8 Construction pertaining to pipe carrying culvert including laying of pipe sleepers

anchored with standard dowels, covers, fixing steps etc. shall be carried out according to meeting details on drawings and approved procedures using precast RCC units/members




all debris and obstructions.23 75 mm dia. holes in precast units meant for lifting shall be filled in with concrete24 Access box out shall be closed with concrete, after pipe are laid 25 Either side of road shall be provided with cable markers to indicate running services26 8 mm galvanized removable chequered plate covers with 2 lifting handles shall be




Chapter 3 Excavations & CrossingsMajor Equipment

1 Excavator, Dumper trucks, Compactors. Jack Hammer, Compressor, Asphalt finisher, Road Rollers


MS18 Road crossing to install culvert for 1# 14” desalinated water

corniche road/road c @t gup gate nothIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment

Scope1 Statement is aimed to propose procedures to be adopted to carry out excavation and

installation of 1 # precast culvert at road crossing as shown on attached sketch

Drawing reference 1 Piping Interconnections Corniche Road Culvert







Method (sketch # 17/18/20 just indicative)1 Application for obtaining permit to work shall be movd on to authority & Required

‘permit to work’ shall be obtained from Plant Refinery Division.2 Record drawings regarding existing services shall be obtained.3 A traffic diversion management scheme shall be produced on site as detailed on attached

sketch

Existing Services 1 On East End of crossing exist ‘banks’ of electrical cables & also, exist, some utility pipes.2 On West End exist certain services3 An electric pole exists on West of gate, but out of culvert reach



Chapter 3 Excavations & Crossings4 On South adjacent to road, exists seawater pipe in running in trench

Procedures1 Backfilling shall be carried out to existing excavated seawater trench on south of

Corniche road crossing up to natural ground level to provide effective traffic access to working area from road carriageway according to/conforming to approved traffic diversion management scheme attached

2 Traffic diversion management scheme shall be implemented effectively3 Hand excavation shall be carried out to expose cables & other services, employing

seaming relevant area with detectors to discover existence of cables 4 After exposure, all cables shall be covered with split PVC pipe and well supported

temporarily, to continue excavation mechanically 5 Remaining portion of trench shall be excavated by machine to defined formation or bed

levels6 Preparation of trench to construct RCC culvert shall be carried out 7 Construction pertaining to pipe carrying culvert including laying of pipe sleepers

anchored with standard dowels, covers, fixing steps etc. shall be carried out according to conformance to drawings and approved procedures permanently including precast RCC units/members




all debris and obstructions.



Chapter 3 Excavations & Crossings23 75 mm dia. holes in precast units meant for lifting shall be filled in with concrete24 Access box out shall be closed with concrete, after pipe are laid 25 Either side of road shall be provided with cable markers to indicate running services26 8 mm galvanized removable chequered plate covers with 2 lifting handles shall be



Road Rollers


MS19Road crossing to install culvert for 1 # 14” desalinated water avenue

‘c’ road gup gate east main entranceIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment


installation of 1 # precast culvert at road crossing, as shown on attached sketch

Drawing reference 1 Piping Interconnections Avenue C Culvert







Method (sketch # 17/18/20 just indicative)1 Application for obtaining permit to work shall be moved on to authority & Required

‘permit to work’ shall be obtained from Plant Refinery Division.



Chapter 3 Excavations & Crossings2 Record drawings regarding existing services shall be obtained.3 A traffic diversion management scheme shall be produced on site as detailed on attached

sketch

Existing Services 1 On North and South end of crossing, exist many electrical cables, minor irrigation cables

& also, exist some utility pipes. 2 Two trees located on either end shall be effected and require preservation3 Hortriculture department shall be consulted on removal & preservation of trees4 On side terrace, a small portion of existing interlocking block paviours shall be effected

Procedures1 Entrance road shall be closed to all traffic. 2 Traffic shall be diverted to use North gate3 Trees under effect shall be removed and preserved4 Crossing shall be carried out in one instance5 Hand excavation shall be carried out to expose cables & other services, employing

seaming involved area with detectors to discover existence of cables 6 After exposure, all cables shall be covered with split PVC pipe and well supported

temporarily, to continue excavation mechanically 7 Remaining portion of trench shall be excavated by machine to defined levels8 Preparation of trench to construct RCC culvert shall be carried out 9 Construction pertaining to pipe carrying culvert including laying of pipe sleepers,

anchored with standard dowels, covers, fixing steps etc. shall be carried out according to as shown on drawings and approved procedures using precast RCC units/members

10 75 mm dia. holes in precast units meant for lifting shall be filled in with concrete11 In addition, one access box out on both ends shall be provided to design details12 Diverted road traffic services shall be reinstated13 Inspections shall be conducted to requirement14 Backfilling up to road formation shall be carried out according to meeting specifications15 Broken asphalt portion shall be made good using new asphalt16 Traffic diversion shall be removed after road crossing is cleared of all debris and

obstructions.17 Access box out shall be closed with concrete after pipes are laid18 Removed/Preserved trees shall be replanted & all landscaping reinstated to RRD/GUP

satisfaction19 8 mm galvanized removable chequered plate covers with 2 lifting handles shall be




1 Sketch showing traffic diversion




Road surface reinstatement over box culvert crossingsIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment

Scope1 Statement is aimed to propose procedures to be adopted to carry out reinstatement works

to existing road surfaces, which were removed from crossings portions for laying services below, pertinent to Avenue C, D, First Street, GUP Entrance etc.

Reference1 Specification Section relating to road works





















Responsibilities in addition to foregoing general description1 S shall accurately plot and record all as built marks respecting existing road lines, levels

& possible control references.2 SE & SO shall ensure that traffic diversion works well from safety viewpoint3 SO shall ensure that equipment operators comply with safe procedures4 SO shall ensure that all safety measures are effected, while works are being carried out in

trench from ground5 PSM shall ensure that validity of permit to work is in force, until involved works are

completed including asphalt work at a later stage after concrete slab is finished





activity commences. 5 Only, specifically approved mechanical equipment/third party certified, whilst locating

these services shall be used6 SO shall ensure that persons being inducted on site are well aware of adopting

right/suitable safety procedure to be implemented on site for activity concerned.7 All persons available upon site shall wear PPE issued to them. 8 This may include provision of signage, barriers, watchman and night lighting.9 When, traffic is required to be diverted for requirement to cross some road, permit to






would act to bring adopted safety measures to an acceptable standard

Material1 Bitumen MC12 Asphalt Concrete for Base/Under Course3 Tack Coat SS1h4 Asphalt Concrete for Wearing Course

Method (sketch # 18/20 just indicative)Traffic Management

1 RRD Approved Traffic Diversion Management Scheme shall be implemented to requirement

Surface Preparation Primer

1 Portion of backfilled earth 120mm deep shall be excavated from existing road surface level followed by compaction, testing and preparation for application of primer

2 Approved compacted surface shall be made ready for applying MC1 primer3 Civil Contractor QC inspection shall be conducted to ascertain suitability of surface to

receive primer4 Primer shall be sprayed by tanker on complete surface @ 0.8 to 1.4 litres/sqm5 Surface shall be left for such time, until material dries out, usually 24 hours post

application otherwise, sand shall be used to blot in excessive bitumen, prior to commence to lay Base/Under course asphalt concrete

60 mm Thick Base/Under Course Asphalt Concrete1 Civil Contractor QC inspection shall be conducted to ascertain suitability of primed

surface to receive asphalt concrete2 Asphalt concrete shall be laid on approved surface to prepared profile, so that a uniform

60 mm compacted thickness is obtained after compaction by rolling3 After spreading material, rolling shall be carried out by one 3 wheel roller, one Pneumatic

Tyre roller and one 2 axle Tandem rollers 8 to 18 tonnes capacity, all according to specified procedures giving 6 passes, overlapping previous pass by 300mm of previous rolling trip using sufficient oil or water to moisten wheels and fully compacted before laid asphalt concrete reaches down to temperature 80 degree C

4 An allowance for one hour shall be given to commence to lay Wearing course, after base course is compacted by rolling

5 Civil Contractor QC inspection shall be conducted throughout above operations

Tack/Seal Coat using SS1h1 An application of tack coat @ 0.4 to 0.7 litres/sqm shall be carried out on rolled surface

of Base/Under Course



Chapter 3 Excavations & Crossings2 Civil Contractor QC inspection shall be conducted to ascertain correct Base Course

surface profile and Tack Coat acceptability

60mm Wearing Surface Course1 Asphalt Concrete shall be laid for Wearing coat also, in a similar manner ensuring that

top of compacted material is at same level as top of existing road surface on both sides of culvert

2 Civil Contractor QC inspection shall be conducted to ensure that surface is to laid & rolled to an acceptable profile and compaction is carried out to standards

3 Area shall be fully cleared to normal requirement4 Traffic diversion management scheme shall be removed and normal traffic restored

Equipment1 Bitumen Tanker, Pressure boom, Asphalt Concrete Spreader and paver, Road Rollers

Attachment1 None

MS21Road crossing @ fire station/first street

for laying 2 # 100 mm sleeves for telephone cablesIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment

Scope1 Statement is aimed to propose procedures to be adopted to carry out excavation & lay

sleeves at road crossings meant for 2 # Telephone Cables

Drawing reference 1 Not included



all contents up to Method

Method (sketch # 18/20 just indicative)1 Required permit to work shall be obtained from Plant Refinery Division.2 Record drawings regarding existing services shall be obtained.3 A traffic management scheme shall be produced on site as detailed on attachment to

permit to work sketch duly approved by RRD 4 Road shall be excavated in one instance by diverting traffic to North

Procedures



Chapter 3 Excavations & Crossings1 Traffic diversion management scheme shall be implemented effectively2 Asphalt pertaining to crossing portion shall be removed mechanically 3 Hand excavation shall be carried out to expose cables & other services by employing

seaming involved area to detect existence of cables 4 After exposure, all cables shall be covered with split PVC pipe and well supported

temporarily to continue excavation mechanically 5 Remaining portion of trench shall be excavated by machine to defined levels6 Setting out lines for sleeves shall be marked on on trench formation by surveyor inline to

details included on drawing7 Formation shall be prepared to receive bedding concrete8 Civil Contractor QC Inspections shall be conducted to approve formation 9 100mm thick bedding Concrete shall be poured & cured according to approved

procedures10 100 mm dia. PVC sleeves shall be laid to exact locations and levels/anchored

temporarily, until haunch concrete is laid on sleeves11 Civil Contractor QC Inspections shall be conducted to approve levels and alignment 12 Haunch concrete shall be carried out according to standard details, followed by curing

complying to approved procedures13 Backfilling up to road formation shall be carried out upto road asphalt bottom level in

conformance to/according to specifications14 All inspections shall be conducted & if testing is required, shall be conducted15 Removed asphalt portion shall be made good using new asphalt concrete to be laid to

approved procedures16 Traffic management scheme shall be removed, after road crossing is cleared of all debris

and obstructions.17 Either side of road shall be provided with cable markers to indicate services

Major Equipment1 Excavator, Dumper Trucks, Concrete Trucks, Concrete Pump, Vibrators, Compactors.

Jack Hammer, Compressor, Asphalt finisher & Road Rollers etc.Attachment

1 Sketch showing Traffic Management Scheme

MS22 Road crossings to construct box culverts ofh 2 & 3

corniche road (cast in situ) ethylene exportIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment

Scope1 This statement is aimed to propose procedures to be adopted to carry out construction of

cast in situ culverts at road crossings for OFH 2, 4 & 5 on Corniche Road








Method (sketch # 20 just indicative)1 Required permit to work shall be obtained from Plant Refinery Division.2 Record drawings regarding respecting existing services shall be obtained.

Procedures1 For culvert OFH 3, traffic diversion scheme shall be implemented subject to RRD

approval2 Hand excavation shall be carried out to expose cables & other services, by employing


temporarily to continue excavation mechanically 4 Remaining portion of trench shall be excavated by machine to formation defined levels5 Preparation of trench to construct RCC culvert shall be carried out in line to requirements6 Construction pertaining to pipe carrying cast in situ culverts i.e. setting out lines & level,

laying blinding concrete, protection membrane application, preparatory formwork, rebar placing, concrete pouring, curing etc. all works shall be implemented in different stages, according to complying with approved procedures.

7 Civil Contractor QC inspections shall be conducted throughout above construction stages according to check lists and ITPs requirements

8 Laying of pipe sleepers anchored with standard dowels, placing covers, fixing steps etc. shall be carried out according to drawings and approved procedures using precast RCC units/members for sleepers and culvert manhole/access covers and 75 mm dia. sling holes filled in with concrete

9 Diverted existing services shall be reinstated to original locations or as directed by operating authority

10 Inspections shall be conducted to requirement for approvals11 Backfilling up to road formation shall be carried out according to specifications12 Broken/dismantled asphalt portion shall be made good with laying new asphalt according

to approved procedures13 Access box out shall be closed with concrete, after pipes are laid14 8 mm galvanized removable chequered plate covers with 2 lifting handles shall be






Chapter 3 Excavations & Crossings1 None

MS23 Road crossings to install culverts ofh 4 & 5

corniche road ethylene export (precast)IndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment


installation of precast culverts at road crossings Corniche Road Culverts OFH & for Ethylene Exports






exercised during raising/lifting/hoisting/installing/downing (handling) to exact locations, strictly adhering to relevant safety measures


Method (sketch # 17/18/20 just indicative)1 Required permit to work shall be obtained from Plant Refinery Division.2 Record drawings regarding existing services shall be obtained.

Procedures1 Site setting out respecting culvert location & route coordinates & levels shall be given by

surveyor2 All existing tree/plants shall be removed from site & taken to a safe place for re

transporting to site for re plantation3 Traffic shall be diverted as approved on permit to work by competent authority4 Asphalt if required to be dismantled, shall be broken mechanically5 Hand excavation shall be carried out to expose cables & other services employing


temporarily to continue excavation mechanically



Chapter 3 Excavations & Crossings7 Base on operator’s authority decisions, live services may be required to be temporarily

diverted that should be done.8 These services may also, required to be protected to defined procedures, which protection

would be applied accordingly. 9 Remaining portion of trench shall be excavated by machine to formation defined levels10 Preparation of trench to construct RCC culvert shall be carried out11 Precast units shall be laid to lines & levels indicated by surveyor 12 Construction pertaining to pipe carrying culvert including laying pipe sleepers anchored

with standard dowels, RCC covers, fixing steps etc. shall be carried out, all according to drawings and approved procedures using precast RCC units/members

13 75 mm dia. holes in precast units meant for lifting shall be filled in with concrete14 In addition, one access box out on both ends shall be provided to design details15 Inspections shall be conducted to requirement16 Diverted services shall be reinstated17 Backfilling up to road formation shall be carried out according to specifications18 Broken asphalt portion shall be made good using new asphalt19 Removed/Preserved trees shall be replanted & all landscaping reinstated to RRD/GUP

satisfaction20 8 mm galvanized removable chequered plate covers with 2# lifting handles shall be




1 None MS24

Excavation for 200 pair telecom route(direct buried) parallel to avenue d & 3rd street


Scope1 This statement aims to propose procedures to be adopted to carry out excavation on

telecom route from N parallel to Avenue D & 3rd street








Method (sketch # 20 just indicative)1 Required ‘permit to work’ shall be obtained from Plant Refinery Division.2 Record drawings regarding existing services shall be obtained.

ProceduresFollowing main operations are involved

1 Record drawing pertaining to existing services shall be obtained from RRD 2 Setting out proposed route in all respects from point marked #1 to #33 Civil Contractor QC inspection shall be carried out to approve layout for proposed

excavation.4 Trial pits shall be excavated manually to dimensions 3mx2m in ‘plus’ shape 1m wide &

about 1 m deep @ 50 m intervals to expose cables & other , employing seaming area with detectors to discover existence of cables

5 After exposure, all existing cables shall be covered with split PVC pipe and well supported temporarily to continue excavation mechanically

6 Remaining portion of trench between pits shall be excavated 500mm wide & 1000 mm deep by machine to defined levels

7 Civil Contractor QC inspection shall be carried out to approve excavated profile8 A layer of sand bedding shall be filled to receive 200 pair telecom cables 9 EPC Contractor shall lay cable on complete prepared route10 After release of cable laying, sand shall be filled on sides as well as, 100mm thick over

cables11 Cable tiles shall be laid en route according to standard details12 A layer of gatch fill 250mm thick shall be laid over cable tiles & warning tape provided13 Over gatch fill, up to finished grade level, backfill shall be carried out to approved

procedures

Major Equipment1 Excavator, Dumper trucks, Compactors

Attachment1 Route sketch

MS25 Hand excavation for 200 pair telecom route

(direct buried) parallel to avenue cIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/AttachmentScope

1 This statement aims to propose procedures to be adopted to carry out excavation on telecom route from existing 500mm sleeve at N under road Avenue C & passing to existing Telecom Centre from N to N at E




Drawing reference Not included




Method (sketch # 20 just indicative)1 Required permit to work shall be obtained from Plant Refinery Division.2 Record drawings regarding existing services shall be obtained.

Procedures1 Record drawing pertaining to existing services shall be obtained from RRD

Following main operations are involved, while for information, cable laying activity has also, been included

1 Setting out proposed route in all respects in line to design requirement2 Civil Contractor QC inspection shall be carried out to approve layout for excavation3 During manual excavation, exposed existing cables shall be properly protected and well

supported temporarily 4 Trench shall be excavated 500mm wide & 1000 mm deep manually to defined levels 5 Civil Contractor QC inspection shall be carried out to approve excavated profile6 A layer of sand bedding shall be filled to receive 200 pair telecom cables 7 EPC Contractor shall lay cable on complete prepared route8 After release of cable laying, sand shall be filled on sides as well as, 100mm thick over

cables9 Cable tiles shall be laid en route according to standard details10 A layer of backfill 250mm thick shall be laid over cable tiles & warning tape provided11 Over previous backfill, up to finished grade level, further backfill shall be carried out to

approved procedures

Major Equipment1 Compactors, Compressor

Attachment1 Route sketch

MS26 200 pair telecom road crossing

at avenue D/3rd street intersection along EIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment



Chapter 3 Excavations & CrossingsScope

1 This statement aims to propose procedures to be adopted to carry out 2# 160 mm dia. ducts laying work for telecom route to cross at E near Avenue D/3rd street intersection





Method (sketch # 18/20 just indicative)1 Required permit to work shall be obtained from Plant Refinery Division.2 Record drawings regarding existing services shall be obtained.

ProceduresFollowing main operations are involved on carrying out this activity

1 Record drawing pertaining to existing services shall be obtained from RRD 2 Production of approved Traffic diversion scheme shall be submitted with application to

obtain permit to work giving details diversion about involved crossing.3 Setting out proposed route in all respects shall be effected by surveyor 4 Manual & mechanical excavation to be conducted further followed by duct laying,

concrete surround & backfill activities.5 Civil Contractor QC inspection shall be carried out to approve setting out/layout6 During manual excavation exposed existing cables shall be properly protected and well

supported temporarily 7 Trial pit shall be excavated manually to dimensions 3mx2m in ‘plus/+’ shape 1m wide &

about 1 m deep to expose cables & all other services employing seaming involved area with detectors to discover existence of live cables

8 After exposure of such services, all existing cables shall be covered with split PVC pipe and well supported temporarily, to continue excavation mechanically

9 Remaining portion of trench shall be excavated 500mm wide & 1000 mm or more deep by machine to defined levels

10 Civil Contractor QC inspection shall be conducted to approve excavated profile11 Defined 160mm dia. ducts shall be laid in position to be surrounded with concrete12 After approval, concrete shall be poured on sides as well as, 100mm thick over ducts 13 Backfill in 250mm thick layers shall be carried out up to finished grade level to approved

procedures14 Traffic diversion management scheme shall be removed, after backfill is completed

Major Equipment1 Excavator, Truck, Compactors, Compressor



Chapter 3 Excavations & CrossingsAttachment

1 Traffic Management Scheme, Route sketch MS27

Manual excavation200 pair telecom road crossing

@ access road to operating camp @ c/l, coordinate N/avenue CIndexScope/Reference documents/Definitions/Responsibilities/Safety/Method/Equipment/Attachment

Scope 1 This statement aims to propose procedures to be adopted to carry out 2# 160 mm dia.

ducts laying work for telecom route to cross at N @ Avenue C/between 5 th & 3rd

street/Police check post intersection





Method (sketch # 18/20 just indicative)1 Record drawings regarding existing services shall be obtained.2 Required permit to work shall be obtained from Plant Refinery Division.3 Permit application with method statement & traffic diversion scheme would be made.

ProceduresFollowing main operations are involved

1 Record drawing pertaining to existing services obtained from RRD & studied to understand, whether or not an adverse impact of either removal or diversions results on proposed activity.

2 Production of approved Traffic diversion scheme/sketch attached for diversion3 Setting out proposed route in all respects4 Manual excavation to uncover existing services ensuring no damages caused to live

services, followed by bedding, duct laying, Concrete surround & backfill activity would be main activities.

5 Civil Contractor QC inspection shall be carried out to approve layout, after setting out is complete.

6 After exposure, all existing cables shall be covered with split PVC pipe and well supported temporarily to continue excavation to defined levels

7 Civil Contractor QC inspection shall be conducted to approve excavated profile8 2 # 160mm dia. ducts shall be laid in position bedded, to be surrounded with concrete



Chapter 3 Excavations & Crossings9 After approval of ducts laid, concrete shall be poured on sides as well as, 100mm thick

over ducts 10 Fill in 250mm thick layers shall be carried out up to finished grade level in line to

approved procedures11 Civil Contractor QC inspection shall be conducted throughout above operations 12 Traffic management scheme shall be removed after backfill is completed

Major Equipment1 Compactor, compressor

Attachment1 Traffic Management Scheme, Route sketch

MS28Excavation for ethane & propane gas pipeline interconnections


Scope1 This statement is aimed to propose procedures to be adopted to carry out excavation for

trenches for laying Ethane and Propane pipeline, from Plant through to Company project site excluding works respecting road crossings, where separate method statements shall apply

Reference documents1 Specification- Excavation & Backfilling for Underground Structures




Method (sketch # 20 just indicative)1 Permits pertaining to relevant excavation area shall be obtained from Plant Refinery

division.2 Since, no road is being crossed, no traffic diversion shall be required3 Surveyor shall set out route of proposed gas pipeline trench conforming to IFC drawings4 Supervision at workface must have a copy of permit, drawing and method statement5 All existing services shown on these drawings shall be located and identified. 6 Wherever, protection respecting, these services are required, adequate protection and

warning shall be installed. 7 Cables or pipes that span excavation shall be supported properly to avoid damage. 8 Split ducts and trays shall be provided to protect and support these cables.9 Where necessary, trial pits shall be hand/manually/by excavated to expose services prior

to commencing main excavation



Chapter 3 Excavations & Crossings10 All existing services encountered shall be plotted by surveyor on as built drawing for

reference11 Trench shall be excavated by a tracked excavator to correct lines and levels. 12 Where necessary or as defined on work permit, hand excavation shall be carried out13 When cable markers have been exposed, work shall be temporarily suspended and an

evaluation made about soil conditions. 14 Evaluation shall be conducted by EPC Contractor Superintendant and Operator

operations representative. 15 Where necessary, a revised method statement of work may be necessary and in this

instance, all personnel shall be briefed16 Exposed (Existing) cables and pipelines shall be checked for damage by EPC Contractor

supervision and combined inspection should be held by EPC Contractor and Civil Contractor.

17 Operation department shall be invited to attend proposed inspection for clarity & resolution

18 Cables shall be protected by fitting split sleeves after exposure19 Sides of excavation shall be sloped to sustain possible subsidence. 20 Barriers (including warning tape) shall be placed to indicate an open excavation21 Excavated material shall be stockpiled in agreed areas for reuse. 22 Surplus material shall be removed to tip area using dump trucks. 23 Surveyor shall monitor lines and levels of excavation operation throughout ongoing

excavation24 EPC Contractor engineer shall approve suitability of formation material by inspecting

bottom of trench and after approval is obtained, compaction of formation level should be carried out to required specified density values.

25 Site test laboratory shall conduct density test and resulting values pertaining to density and moisture contents should be reported confirming that compaction carried out conforms to specification requirement

26 Surveyor shall provide level pins that indicate correct elevation of bedding required for gas pipes.

27 Bedding shall be laid and compacted in accordance with specification requirement. 28 Test laboratory shall conduct test and report results29 Gas pipes shall be placed correctly within trench by EPC Contractor (not Civil

Contractor) in accordance with EPC Contractor own method statements 30 Upon acceptance of pipe installation, pipes shall be surrounded with further bedding

material, which should be compacted using suitable equipment31 Approved backfill material shall be spread uniformly in layers of 200 mm & compacted

to 150 mm in line to specification requirement and tested accordingly32 When backfilling, tile markers and warning tape shall be replaced and provided between

cable and tile markers33 This activity shall continue up to existing ground level. 34 Site shall be left tidy of excavated and backfill material

Major Equipment1 Excavator/Dump Trucks/Compactors

Attachment



Chapter 3 Excavations & Crossings1 None


Engineering

3 excavation crossing