mjpn pgas 3514 ga pr 012_construction and as build survey procedure_e_reva

PT. PGAS Solution

CONSTRUCTION AND AS-BULIT SURVEY PROCEDURE

Document No. Rev. Date of 19

MJPN-PGAS-3514-MP-PR-027 A 28/07/2015

PT. Perusahaan Gas Negara (Persero) Tbk.

PELAKSANAAN KERJASAMA PENINGKATANKEHANDALAN JARINGAN UNTUK PENYALURAN GAS

WILAYAH PASURUAN MOJOKERTO

Contract No.055600.PK/HK.02/PMO/2014

A Issued For Review 28-07-2015 BSN HMD AK

REV DESCRIPTIONDate Prepared Checked Approved Employer

PersonelEmployer

PGAS SOLUTION

PT. PERUSAHAAN GASNEGARA

(Persero) Tbk. PT. Connusa Energindo

PT. PGAS Solution

CONSTRUCTION AND AS-BUILT SURVEY PROCEDUREDocument No. Rev. Date

of 19MJPN-PGAS-3514-GA-PR-0XX A 19/06/2015



Table of Contents

1. GENERAL ....................................................................................................... 4

1.1. Purpose and Scope ................................................................................... 4

1.2. Abbreviation / Definitions ........................................................................... 4

2. CODES AND STANDARDS ............................................................................ 4

3. SAFETY, HEALTH AND ENVIRONMENT....................................................... 5

4. ENVIRONMENT.............................................................................................. 6

5. REGULATION PERMITS ................................................................................ 6

5.1. Regulatory Permit ...................................................................................... 6

5.2. Working Permit .......................................................................................... 6

6. LIAISON OFFICER.......................................................................................... 6

7. MANPOWER................................................................................................... 7

8. ROLES AND RESPONSIBILITIES .................................................................. 7

8.1. Surveyor .................................................................................................... 7

8.2. Assistant Surveyor..................................................................................... 7

8.3. Safety Officer............................................................................................. 8

8.4. Helpers ...................................................................................................... 8

8.5. Liaison Officer............................................................................................ 8

9. EQUIPMENTS................................................................................................. 8

10. WORKING TIME ............................................................................................. 10

11. Communication system ................................................................................... 10

12. PRE SURVEY ................................................................................................. 10

12.1. General...................................................................................................... 10

12.2. Survey Location......................................................................................... 11

13. CONSTRUCTION SURVEY ............................................................................ 11

13.1. Setting out Centreline Alignment................................................................ 11

13.2. Trench Excavation Survey ......................................................................... 12

13.3. Pipeline Lowering-in Survey ...................................................................... 13

13.4. Pipeline Backfilling Survey......................................................................... 14

13.5. Existing Properties Marking ....................................................................... 16

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13.6. Setting out Waterway and Road Crossing Survey ..................................... 17

13.7. Civil Construction Survey........................................................................... 18

13.8. Colour Code .............................................................................................. 19

14. AS-BUILT SURVEY......................................................................................... 19

15. INTERFACE .................................................................................................... 19

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1. GENERAL

1.1 Purpose and Scope

This procedure describes the minimum requirements for Pipeline Route identification

before, during, and after construction, including but not limited to the following:

Survey and marking for pre-construction survey activities.

Installation of temporary benchmarks to support survey activities.

Survey and marking during construction.

Survey after construction to provide as-built data.

Data processing

1.2 Abbreviation / Definitions

EMPLOYER PT. Perusahaan Gas Negara (Persero) Tbk.

EMPLOYER PERSONEL PT. Connusa Energindo, as Project Management

Consultant.

CONTRACT Pelaksanaan Kerjasama Peningkatan Kehandalan

Jaringan Untuk Penyaluran gas Wilayah Pasuruan

dan Mojokerto.

CONTRACTOR PT. PGAS Solution.

2. CODES AND STANDARDS

The following specification and documents are used as reference in development of this

procedure:

CP17-PGN-3514-GA-ER-007 Employer’s Requirement Onshore Pipeline

MJPN-PGAS-3514-SY-DG-006 Typical drawing for ditch details

MJPN-PGAS-3514-SY-DG-005 Warning marker Tape, Control measuring erection

ASME B31.8 GasTransmissionandDistributionPipingSystem.

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MJPN-PGAS-3514-MP-PR-016 Field Joint Coating Procedure

MJPN-PGAS-3514-MP-PR-014 Trenching Procedure

MJPN-PGAS-3514-PL-CA-001 Calculation For Pipeline Free Span

Migas Regulation

MJPN-PGAS-3514-PL-DG-009 Typical Drawing for Foreign Pipeline Crossing

MJPN-PGAS-3514-MP-PR-023 Reinstatement and Restoration Procedure

MJPN-PGAS-3514-PL-DG-003 Topography and Alignment Sheet

MJPN-PGAS-3514-MP-PR-017 Pipeline Crossing procedure

MJPN-PGAS-3514-MP-PR-027 Pipeline Lowering Analysis

3. SAFETY, HEALTH AND ENVIRONMENT

All personnel, including Third Parties and Subcontractors, shall receive a safety

induction prior to entry onto site.

Badge/verification card shall be used by all personnel during working time on site

Any operations carried out where there is public access or a thoroughfare such as a

road, shall be closely monitored by the Site Safety Officer.

All personnel shall be provided with and use the appropriate Personal Protective

Equipment (PPE) (e.g. hard hat, safety goggle, safety shoes, hand gloves, etc.).

All tools and equipments shall be checked daily by qualified person prior to use.

JSA shall be clearly explained to all workers by the supervisor during the toolbox

meeting. The Supervisor shall ensure that all personnel understand all the risks and

hazards identified on the JSA.

All required warning signs, barriers and protection shall be installed prior to the start

of construction activity.

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4. ENVIRONMENT

Workers shall keep the working area clean and tidy. Waste shall be disposed off in

disposal bins.

While filling equipment with fuel, fuel hand pump shall be used. Plastic sheet and drip

pan shall be placed under the equipment to manage fuel spill.

Smoking at working area is strictly prohibited.

5. REGULATION PERMITS

5.1. Regulatory Permit

Prior to start of any construction activities, the supervisor shall ensure that the site has

been permitted to work by EMPLOYER, local authorities and/or local land owner to

avoid unnecessary delays due to any problems that may arise during the performance

of the work.

Valid permit from authorities must be obtained when working / interfacing with third

party.

5.2. Working Permit

Permit to Work (PTW) shall be prepared by Supervisor and approved by EMPLOYER

representative and shall be in accordance to PTG-BLKM-00-HSE-PR-001 Work Permit

Procedure. A permit-to-work coordinator will be provided to ensure each permit are

filled out correctly with necessary attachment (certificates, JHA, etc.).

6. LIAISON OFFICER

The CONTRACTOR Liaison officer shall inform the village chief 2 weeks before start of

the activities that the construction will commence. All local land owners beside the

PIPELINE ROUTE shall also be informed at the same time or prior to the start of work.

A Liaison officer team will be assembled to move ahead of each spread to notify land

owner of the upcoming construction activities.

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7. MANPOWER

CONTRACTOR will mobilize the following manpower to perform construction survey

activity. Each team will consist of the following persons:

Table-1 Manpower List

No Description Pax

1 Surveyor 1 person

2 Surveyor Assistant 2 person

3 Safety Coordinator 1 person for all team

4 Safety Officer 1 person

5 Helpers 1 persons

6 Liaison team personnel 1 person

7 Mini Bus/van Driver 1 person

8. ROLES AND RESPONSIBILITIES

8.1. Surveyor

The Surveyor is responsible to perform and supervise the survey activities. Surveyor is

also responsible to collect data of actual site conditions. The Surveyor shall submit the

collected As-built Survey data to the field engineer for further data processing.

8.2. Assistant Surveyor

The assistant surveyor is responsible to:

Perform the survey and marking activity.

Provide accurate actual site data.

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Perform the survey activity in safe manner as per HSE regulation and approved

working procedure.

8.3. Safety Officer

The Safety Officer will be responsible for the implementation of the HSE Plan and in

compliance with all statutory regulations that govern all the activity commenced at his

assigned spread. The safety officer will be assisted by a safetyman at every

construction spread to help supervising the HSE aspect of the work undergone and also

to conduct safety briefings.

8.4. Helpers

The Helpers are responsible for performing all work instructed by supervisor correctly

and safely. Work is consist of unskilled activities such as: preparing the hand tool,

perform manual handling, etc.

8.5. Liaison Officer

The Liaison officer is responsible to inform and update the working activities to every

village chief and local community along the pipeline PIPELINE ROUTE. He/She is also

responsible to solve any social-economic problems that may occur prior, during, or after

construction. The liaison team shall continuously inform and update about the

construction activities with the local communities.

9. EQUIPMENTS

CONTRACTOR will mobilize the following equipment to perform construction survey

activities. Each team will consist of the following:

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Table-2 Equipment List

Measure equipment shall have calibration certificate from independent party.

No Description Qty

1. Total Station 2 set

2. Auto Level 2 set

3. Pipe / Metal Detector 1 unit

4. Hand GPS 1 unit

5. Hand tools (hammer, machete, hoe, etc) As required

6. Mini Bus/Van 1 unit

7. Grass cutter machine (if necessary) 1 unit

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10. WORKING TIME

Working times will start at 7.00 am, after a Pre-Job meeting and a check that all

equipment and tools are in good condition prior to use. 11.45 am to 12.00 am is the

time designated to clean-up the working area and tidy the equipment or tools prior to

lunch time. Lunch time is 12.00 to 1.00 pm. Working continues at 1.00 pm until 6.00 pm.

Prior to leaving the working area, all equipment and tools shall be tidied up and the

working area shall be cleaned. Supervisor shall inform the safety man and EMPLOYER

site representative when overtime is required, in a timely manner. No work during rainy

and risky weather.

11. communication system

The primary communication system on site will be by mobile phone. The Handy Talky

will also be provided as secondary communication system on site.

12. PRE SURVEY

12.1. General

All coordinate data obtained from survey work shall be saved in a “Total Station” unit.

The data shall be processed using computerized system.

The survey team will utilize radio communication during survey and marking work

activities.

The survey team shall conduct the survey and marking activities work in accordance

with the project HSE regulations and approved procedures.

A valid calibration certificate for the survey equipment shall be on site at all times and

the equipment shall be re-calibrated prior to end of validation date.

The survey work shall use an existing benchmark (BM) provided by EMPLOYER as a

major valid BM. A temporary BM (made from wooden with blue color painted) shall be

installed in maximum 300 m intervals or in every location where a BM is needed.

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Verify all establish Survey marks and re-establish survey marks which are damaged

or missing.

12.2. Survey Location

The areas that will be surveyed are as follows:

Along the pipeline route including construction.

All crossings identified on the alignment sheet drawings.

Future Connection & Launcher Station Belawan

LBCV

Japanan Metering

Construction access roads to be used.

All underground utilities / pipelines and or properties along the pipeline route.

13. CONSTRUCTION SURVEY

13.1. Setting out Centreline Alignment

The surveyor will use an existing BM to define the IP coordinates as mentioned in the

alignment sheet drawing. Subsequently from this IP point, surveyor will offset the point

3 m to the left and right and mark this position as the pipeline deviation limit. The

markers shall be installed at a maximum 25 m interval. The limit of the permanent

PIPELINE ROUTE shall be marked with a wooden peg with white (see Section 13.9

Colour Code). Tall grass and brush shall be cleared manually (use machete or hoe)

and/or grass cutter machine if necessary prior to installing the marker.

As a minimum, the centreline alignment shall be surveyed and staked at the following

locations:

a. Centreline of trench at 25m intervals at straight and closer at curve.

b. Start and end of curve, tangent to curve (TC), and curve to tangent (CT)

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c. Start and end point of pipeline crossing

d. Start, middle and end of pipe bend at location where there is gradient change.

e. Start and end point for wall thickness change.

f. Start and end point for buoyancy control measures.

g. Location of buried utilities

h. Location of valve, scraper traps, and or other assemblies, cathodic protection test

station and other pipeline appurtenance.

i. Location where pipe is to be installed to specified location and elevations.

Figure-1 Wooden Peg for Stake Out

13.2. Trench Excavation Survey

As part of the PIPELINE ROUTE survey, the limit of open trench excavation (1.5 m +

OD pipe at normal pipeline trench excavation or wider based on soil condition and

trench purpose) shall be marked by the surveyor in order to eliminate excessive

excavation. The centerline of trench shall be also marked. At natural bend location, the

centerline of the trench excavation should be marked at 3 m interval.

During excavation, the trench depth shall be continuously checked by the surveyor. The

survey may be done by measurement stick to avoid entry of the surveyor into the open

KP4+

020

WOODEN PEG 5 CM X 7 CM

HEIGHT = 50 CM

MARKED WITH KP NUMBER

COLOUR: BLACKGROUND

300

200COLOUR TAPE

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trench. The depth of the trench shall be in accordance with the required depth as shown

on the approved drawings, alignment sheets or EMPLOYER specification. Detail of the

excavation activity can be seen on document MJPN-PGAS-3514-MP-PR-014“Trenching

Procedure”.

Figure-2 Trench Excavation Survey

13.3. Pipeline Lowering-in Survey

Soon after the pipe has been lowered into the trench, the top of the pipe and the

adjacent undisturbed ground level shall be surveyed (position and elevation) by Total

Station. The data taken from this survey work will be used to prepare the as-built weld

and survey data book and drawings. Detail of this activity can be seen on document no

MJPN-PGAS-3514-MP-PR-015 Lowering-in & Backfilling Procedure.

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Figure-3 Pipeline Lowering-in Survey

13.4. Pipeline Backfilling Survey

After backfilling the trench, the cPipeline Routen of the backfill shall be surveyed in

maximum intervals of 12 m to ensure that a cPipeline Routen of 300 mm has been

obtained. Detail of this activity can be seen on document no MJPN-PGAS-3514-MP-

PR-015 Lowering-in & Backfilling Procedure

Figure-4 Pipeline Backfilling Survey

Setting out LBCV, Metering Station and Cathodic Protection Appurtenances

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All survey marks and existing ground levels at facilities locations will be verified and

submitted complete status report to EMPLOYER before site clearing and grading

activity.

If necessary, details on desired locations for additional reference points or relocation of

existing marks for control and installation of all pipeline and appurtenances will be

submitted for EMPLOYER approval.

Surveyor shall set grid lines at every 2m or at closer intervals after site clearing and

grading within the facility boundary. The surveyor shall mark the limits of the earthwork

area at every corner with wooden pegs staked onto the ground. The stakes (pegs) will

be tied together with nylon rope to mark the land fill limits. Inside the earthwork area

limits, the surveyor shall install wooden markers with elevation marks in grids of

maximum 4 m2

Continue to survey on existing grounds along the grid line before proceeding with the

excavation and fill activities at worksite. The final excavated design level after total

excavation and subsequently record layer-by-layer levels of backfilling materials up to

the final design level shall be observed.

During earthwork (clearing, grading, and land filling), the inside limits elevation marker

shall be maintained, broken markers shall be re-installed or replaced. The surveyor

shall survey the elevation of the land filling both after clearing and after filling with the

auto level unit, since it is possible that inside limit elevation markers are disturbed

during land filling, due to equipment movement and /or personnel activity.

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Figure-5 Grid line setting out

13.5. Existing Properties Marking

During the existing survey activities, the following documents that will be used as

reference:

a. As-built data for existing EMPLOYER Pipeline.

b. Utility map from the utilities owner/operator.

All existing pipelines/utilities and or properties shall be surveyed and marked. The

markers shall be positioned at the exact location of those existing utilities and or

properties. Underground pipelines, cables or other metallic utilities shall be located by

pipe / metal detector. The surveyor will establish the location of an existing pipeline from

information obtained from the reference data mentioned above. Then the pipe detector

operator will sweep across centre line pipeline from left edge to right edge of permanent

PIPELINE ROUTE by using pipe detector. The depth of the existing pipeline can be

monitored on the LCD display of the pipe detector. Upon detection of underground

pipe/utility by pipe detector, manual digging will be performed to positively identify the

exact position and depth of the underground existing utilities. Manual

digging is by using shovels and other hand tools to excavate. When the identified

pipeline or cable which is running in parallel alignment with the new pipeline, the

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existing utility will be marked along its length at a maximum 12 m intervals. If the

identified underground existing pipeline or cable is located across the new pipeline

route, markers shall be installed at a minimum of 2 m apart on both sides of the existing

utilities.

Figure-6 Existing Properties Survey

13.6. Setting out Waterway and Road Crossing Survey

All waterways and road crossings shall be accurately surveyed and marked. The

markers shall be installed with specific blue colour wooden stick at 5 m before and after

the crossing position. The road reserve unit also shall be marked.

The crossing survey report shall include:

Type of crossing.

Crossing dimensions (length, elevation and depth for waterway/underground pipe

crossing).

Crossing profile sketches.

Photographs of the existing road and waterway prior to construction.

Type of crossing (Open cut, Auger Boring, or HDD).

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Refer to MJPN-PGAS-3514-MP-PR-017 Pipe Crossing Procedure

13.7. Civil Construction Survey

The surveyor shall survey and mark the actual positions and elevations of the buildings,

foundations, poles, etc. as per actual site conditions.

The markers shall be made from wooden pegs with yellow and blue color; no steel

markers shall be used. The markers shall be maintained and kept in the correct

location, and undisturbed by the workers.

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13.8. Colour Code

Below are the colour codes of the wooden peg that will be used during survey activities

1. Centre line of new pipeline : Red and white

2. Permanent PIPELINE ROUTE limits : Yellow

3. Centre line of existing FOC : Green

4. Other Existing underground pipeline / utilities : Orange

5. Existing waterway : Blue

6. Land fill mark : Red & white

7. Civil work : Yellow & blue

8. Trench excavation limits : Yellow and Black

14. AS-BUILT SURVEY

The Surveyor shall carry out and document as built survey of the pipeline alignment,

valve station, scraper stations, metering station, cathodic protection and all

appurtenances. As-built data shall be in the form of as-built weld and survey data book

(combination of pipe, weld, and survey data), survey notes, redlined marked-up on AFC

drawings and other relevant data. All as-built setting out on coordinates and heights

shall be relative to the approved survey control points.

15. INTERFACE

CONTRACTOR will send the approved procedure prior to commencement of work to

all parties involved.

CONTRACTOR shall invite the representatives of all parties who interface with the

construction work.

Flagman shall be assigned while equipment are be moved across the public access

road.

The pre-existing conditions of the road and waterway crossings condition shall be

recorded and the photograph shall be taken as reference for reinstatement.

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