001-CIVIL MS for Surveying Works.pdf

Pearl GTL Project

LINDE ENGINEERING

Contractor Project No : 5887 Shell Project No: HP-3000-QAT

Project Document Number: T- 4.234.067 Project Rev.: A Page 2 of 12

Purchase Order Number: 2MH127

N/A Tag/Item Number(s):

ASU Unit(s):

Z PCWBS:

QATAR SHELL GTL PROJECT (PEARL) C2 AIR SEPARATION UNITS CONSTRUCTION

D A 28.01.2008 Ready For Construction SB UA/MC ZG RFC

C O 13.09.2007 Issued for Company Comments SB UA/MC ZG ICC

B Issued for Review IO UA/MC ZG IFR

A Issued for Internal Review IO UA/MC ZG IIR

Approved By

GAMA Project Rev Rev. Date Description

Prepared By

Checked By Status

No. No. ORIGINATOR

Document Title:

LINDE ENGINEERING AG METHOD STATEMENT FOR SURVEYING WORKS

Document No.

GAM MTS CIV GTL 001 D LOC470

Contractor

Gama Qatar Co. W. L. L. Org.

Code Doc. Type

Disc. Code

Geogr. Area

Seq. No

Rev. No Vendor Code

Project Document Number: T-4.234.067 Rev No: A

Doc. Title GAM-MTS-CIV-GTL-001 Rev. D Method Statement for Surveying Works

Date 28.01.2008

T-4.234.067 Rev. A Page 4 of 12

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TABLE OF CONTENTS 1. INTRODUCTION ________________________________________________________________ 5 2. DEFINITIONS __________________________________________________________________ 5 3. REFERENCES __________________________________________________________________ 5 4. HSSE __________________________________________________________________________ 6 5. METHOD OF EXECUTION _______________________________________________________ 7

5.1. Reconnaissance___________________________________________________________________ 7 5.2. Topographic Survey _______________________________________________________________ 8 5.3. Final Report_______________________________________________________________________ 8

6. ORGANISATION ________________________________________________________________ 9 7. EQUIPMENT____________________________________________________________________ 9 8. SCHEDULE_____________________________________________________________________ 9 9. QA/QC INTERFACE _____________________________________________________________ 9 10. ATTACHMENTS______________________________________________________________ 10


Date 28.01.2008

T-4.234.067 Rev. A Page 5 of 12

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1. INTRODUCTION The work covered in this Method Statement is the topographic survey of the Work Site (including Gama Temporary Site Facilities) of the Air Separation Unit Construction of Shell Pearl GTL Plant Project.

The main objectives of this study are: 1. To verify and confirm the status and coordinates of the reference benchmarks.

Benchmarks are referred to as CONTRACTOR benchmarks for construction and were established previously. If required, new benchmarks may be established by the Contractor and/or Subcontractor based on the existing ones at required locations.

2. To verify and confirm existing ground on site prior to topsoil removal and excavation. 3. To provide a proper topographical grid system to form the basis for future measurements

at facilities and construction works. The construction of Benchmarks is beyond the scope of this document and will be carried out as per the Method Statement for Establishment of Permanent Benchmarks (T-4.234.068)

2. DEFINITIONS

Company : QSGTL or its PMC (JK)

Contractor : Linde Engineering AG

Subcontractor or Gama : Gama Qatar Co. W.L.L.

QCP : Quality Control Procedure

QCR : Quality Control Record

ITP : Inspection and Test Plan

QA/QC : Quality Assurance / Quality Control

RLIC or RLC : Ras Laffan Industrial City

3. REFERENCES

QCS Qatar Construction Standard T.4-095.955 Project HSSE Program Overall T.4-095.303 Project HSSE Construction Plan T.4-129.849 Permit to Work Procedure T.4-132.867 Technical Specification Survey and Monitoring

Other International, Company, Contractor and/or Gama Specifications, Procedures and Regulations


Date 28.01.2008

T-4.234.067 Rev. A Page 6 of 12

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4. HSSE

All works shall be in compliance with the State of Qatar laws and regulations, Ras Laffan Industrial City and international standards/codes, and Company and Contractor requirements and instructions. All personnel will go through Gama, Linde and Company Safety Induction courses as well as other trainings as identified by their supervisor. Please see Document Number GTL-GM-001-A-5635 for details. A Job Safety Analysis (JSA) specific for this work including a Risk Assessment, is prepared as per Gama procedure GTL-GM-001-A-5626 and is attached herein. Such JSA addresses the hazards associated with each task within the scope of this Method Statement and introduces the controls that will be implemented to reduce the associated risks to acceptable levels. The JSA will be used by the Site Supervisor as the basis of his TSTI / TSTO and his Toolbox Talks. All personnel will have PPE required for their specific tasks in addition to the minimum PPE (coveralls, safety goggles, safety shoes, high-visibility vests, gloves) at site at all times as required.


Date 28.01.2008

T-4.234.067 Rev. A Page 7 of 12

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5. METHOD OF EXECUTION

5.1. RECONNAISSANCE

Upon completion of mobilization to Ras Laffan and receiving of necessary passes, the chief survey engineer and the survey team shall conduct a site reconnaissance. The main objectives of the said reconnaissance are to: 1. Determination of work order 2. Benchmark verification 3. Reference point set up 4. Calibration record of survey equipment Prior to GAMA Survey permanent controls (which will be established by close traverse method), GAMA survey team shall relocate existing benchmark (Contractor will provide survey control drawings for the use of construction) and will be checked/accepted/signed by Contractor and/or Company representative. The Benchmarks will be established as per Method Statement for Establishment of Permanent Benchmarks (T-4.234.068) in line with Technical Specification for Survey and Monitoring (T.4-132.867).

KThe maximum acceptable closing error of all leveling shall be less than 15 mm (where K is the distance leveled in kilometers (Qatar Survey Manual-2.1.1.5). The maximum acceptable standard for traversing shall be used as a representative fraction will close to 1/25000 (Qatar Survey Manual-2.2.3.1) The benchmarks shall be constructed with concrete according to the existing benchmarks in adequate frequency. To specify the coordinates of the benchmarks, angular and dimensional values shall be obtained by using total stations and implementing closed traverse method. Moreover, in order to specify and determine the levels, Automatic Levels shall be used. In the case of existing underground services, the coordinates of these identified services will be provided by Contractor prior to commencement of the work.


Date 28.01.2008

T-4.234.067 Rev. A Page 8 of 12

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5.2. TOPOGRAPHIC SURVEY A closed traverse to test the accuracy of the surveying equipment

B

A

1. A, B and C are the existing point with known coordinates. Total station is to be placed at

A point and A, B and C points coordinates are to be transferred to Total Station after the reflectors (tripod) are set at B and C points

C

2. The azimuth angle is calculated in accordance with the existing coordinates between points A & B, so A point is connected to B point by using azimuth angle

3. C points coordinates are checked by using total station. If correct, the survey is to be started. All data shall be electronically stored for post-processing at the end of each day. The appropriate field shall be completed by the surveyor for quality checking. Underground services are to be identified and established first by securing from existing underground utility drawings furnished by the Contractor and/or the Company and will be relocated with ground markings, if necessary. However, their above ground identifiers (i.e. manholes, cable markers, etc) shall be surveyed. Calculations and drawings of triangulation will be submitted to Contractor.

5.3. FINAL REPORT

All reports shall be related to the site datum points and the results of the Topographical Survey shall be presented by a Final Report consisting of the following:

1) Existing ground level prior to excavation (Soil excavation). 2) After excavation (Rock levels, etc.). 3) After filling (final/required levels). 4) Backfilling Grid System for FDT locations


Date 28.01.2008

T-4.234.067 Rev. A Page 9 of 12

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6. ORGANISATION

Structure of a work team is as follows: 1 Senior Surveyor 2 Survey Assistants Up to 2 teams will be deployed. In accordance with the schedule, the number of teams shall be arranged to meet with the requirements.

7. EQUIPMENT 1) Total Stations 2) Automatic Levels 3) Computers 4) Leica Survey office Software 5) Printers

All equipment shall be tested and calibrated prior to mobilization; the equipment used will be in good condition. Should the equipment experience damage of failure at site, it shall be suitably replaced or repaired.

8. SCHEDULE

Surveying works shall commence prior to the commencement of site construction activities and shall continue in accordance with the project schedule.

9. QA/QC INTERFACE 1. Calibration status of each equipment shall be maintained periodically, and all Equipments must be tagged and readily identifiable. 2. Calibration register and relevant certificates shall be retained at site. 3. Reference points shall be checked regularly. 4. Daily Survey record shall be maintained and verified by Contractor, if necessary. 5. For verification of the documents related to survey works. Report copies shall be

reviewed and approved by Contractor QA/QC Department. 6. QA/QC forms shall be approved.


Date 28.01.2008

T-4.234.067 Rev. A Page 10 of 12

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10. ATTACHMENTS

Job Safety Analysis

JSA for: T-4.234.067

Normal Approvals: Name DateJSA by:

Job Supervisor:

Name DateDiscipline Superindent (Linde)SHES Representative (Linde)

2.Permit To Work.

LINDE EMERGENCY TELEPHONE NO. HSSE MANAGER: Pearl HOT LINE :

Approval required for hazardous work detailed in the Linde Work Permit Procedure.Changing conditions and emergency proceduresStop work. Switch off equipment.Supervisor directs personnel to nearest and safest muster point considering wind direction. Supervisor counts all employees. Missing employees are reported to Linde HSSE Dept. When all clear is given check with Linde HSSE before returning to work.

OTHERS (List Below):

Signature General job requirements / Common Personnal Protective Equipment.

1. The following Personal Protective Equipment shall be worn:Coveralls, safety glasses, safety helmet, safety shoes and gloves.

Additional Approvals (Determined by Job Supervisor in correlation with Linde HSSE Manager).Signature

Job being analysed: SurveyingDepartment/Section doing JSA: HSSE & Construction JSA Members:

Job Performers:

JOB SAFETY ANALYSIS FORM

Page No: 1 of 2 NEW REVISED

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RISKRANK

1.1 1.1.1 Provision of sufficient cool drinking water and shaded resting places.

1.1.1.1

1.1.2 Sufficient breaks during hot weather.

1.2 1.2.1 All sharp objects like rebars shall be capped.

1.2.2 Hand gloves shall be used in addition to basic PPE.

1.2.3 Housekeeping to free from any tripping hazard or sharp edges.

1.3 1.3.1 Emergency procedures shall be covered in daily TSTI/TBT

1.3.2 First aid boxes shall be provided.

1.3.3 Site clinic shall be in operation.

1.3.4 A vehicle shall be available for emergency.

1.4 1.4.1 All equipment and tools shall be inspected prior to use.

1.4.2 Daily check of equipment & tools shall be made prior to use.

RP C

JOB SAFETY ANALYSIS / RISK ASSESSMENT FOR T-4.234.067 SCOPE : SURVEYING WORKS

Residual RiskInitial Risk

ITEM ACTIVITY CPCONSEQUENCESHAZARDS / POTENTIAL ADDITIONAL

CONTROLSMAIN

CONTROLS1 Surveying Works. Heat Stress

C

Use of tools in poor condition / unsitable or unfit for the job. B

Emergency

B

Sharp objects.

B

3 MED

Monitor temperatures and humidity in work area.

A

A 1 LOW

3 LOW

2 LOW A

2 LOW

1 LOW

2 LOW2 LOW A

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001-CIVIL MS for Surveying Works.pdf