connection of oily water sewer line to new manhole rev01

MS-P-015 REV.01

METHOD STATEMENT

FOR

CONNECTION OF OILY WATER SEWER LINE TO NEW MANHOLE

CONTRACT No. JI-194

SAUDI ARAMCO OIL COMPANY

KARAN UTILITY AND COGENERATION PROJECT

Khursaniyah, Saudi Arabia

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Signature

01 26 July. 2010Print Name

A.J. Rogero N.A. Pacleb R.A. Dimatatac P. Ranzenbacher Rev. DATE Prepared By

MMGChecked By

MMGApproved By

MMGApproved By

PSAL

MS-P-015 REV.01

TABLE OF CONTENTS Page

1.0 PURPOSE 3

2.0 SCOPE 3

3.0 REFERENCES 3

4.0 RESPONSIBILITY 4

5.0 TOOLS AND EQUIPMENT 4

6.0 PROCEDURE 5

7.0 RECEIVING HANDLING AND STORAGE 5

8.0 EXCAVATION 5

9.0 BEDDING 5

10.0 PIPE LAYING AND JOINTING 5

11.0 INSTALLATION 6

12.0 BACKFILLING 7

13.0 INSPECTION AND QUALITY RECORDS 7

14.0 SAFETY PRECAUTIONS 7

15.0 ATTCHEMENT 7

1.0 PURPOSE

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MS-P-015 REV.01

To ensure that Installation/connection of oily water sewer line to catch basin, manhole are carried out in accordance with good working practices. Work is verified, checked and inspected to satisfy the Client’s requirements in accordance with the issued Drawings and Project Specifications.

2.0 SCOPE

This Method Statement encompasses all work activities associated with precast manholes, catch basin and installation of Oily Water Sewer line (OWS) to be performed by the MMG Construction division at Karan Site

3.0 REFERENCES

SAES-S-010 Sanitary Sewers

SAES-S-020 Industrial Drainage and Sewers

SAES-S-030 Storm Water Drainage Systems

SAES-S-060 Sauidi Aramco Plumbing Code

SAES-S-070 Installation of Utility Piping Systems

SAES –A-104 Wastewater Treatment, Re use and Disposal

SAES-L-450 Construction of On- Land and near Shore Pipelines

SAES-L-460 Pipeline Crossing Under Roads and Railroads

SAES-A-114 Excavation and Backfill

SAES-H-002 Internal and External Coatings for Steel Pipelines and Piping

ASTM D1557 Standard Test Method for Laboratory

Compaction Characteristic of Soil

ASTM D4253 Standard Test Method for Maximum Index

Density and Unit Weight of Soil

ASTM D4254 Standard Test Method for Minimum Index

Density and Unit Weight of Soil

4.0 RESPONSIBILITY

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MS-P-015 REV.01

4.1 Piping Supervisor: Ensure compliance by all labor and equipment operators and other associated craftsmen to the requirements of this procedure, Project quality Control procedures / test plans, relevant drawings, safety procedures. Secure all necessary work permits.

4.2 Quality Control Inspector : Conduct activities in accordance with the Project QA Manual and Quality Control Inspection Plan. Prepare daily QC records and final acceptance documentation where required. Maintain close working relationship with the Client's Representative.

4.3 Civil Supervisor : Ensure compliance by all labour and equipment operators and other associated craftsmen to the requirements of this procedure. Project Quality Control procedures/test plans. Relevant drawings, safety procedures and the Costumer’s Specifications during backfilling works. Secures all necessary work permits.

4.4 Safety Supervisor : Ensure that work permits are obtained prior to commencement of any work. Check personnel and confirm compliance to safety requirements, such as wearing personnel protective equipment. Check work areas for any unsafe conditions. Liaison with the Field Supervisors ensuring that work is carried out in accordance with Project Safety Plan / Procedure.

4.5 Engineering Department : Provide technical support to MMG Site Operation section. Provide AFC drawings, material specifications, standards and technical specifications. Responsible for customer’s review of drawings and data and the resolution of technical work execution problems.

5.0 TOOLS AND EQUIPMENT

4.1 Mixer

4.2 Gas Detector

4.3 Tripod, harness and rope

4.4 Hand tools

4.5 360-degree track machine

4.6 Vibrating poker & unit

4.7 Manhole shutters

4.8 Crane 20 ton for lifting precast manhole

4.9 Chain pulley

4.10 Backhoe

4.11 Payloader

4.12 Dumptruck

4.13 Shovel

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MS-P-015 REV.01 6.0 PROCEDURE

This Instruction describes the actual steps to be taken and sequence of events necessary to enable satisfactory completion of each activity.

7.0 RECEIVING HANDLING AND STORAGE

Proper care and protection shall be provided during receiving, handling and storage of pipe materials and precast manhole to prevent damage stresses or deformation.

8.0 EXCAVATION

4.1 Excavation and trenching will be done in accordance with approved method statement.

4.2 Proper care and protection shall be provided to prevent damage to all existing facilities (foundations, services, pipelines) on above, or below the surface of the area where excavation and backfill operations are to be performed.

4.3 Underground obstructions (piping, foundations, and structures) shall not be removed altered without ARAMCO/PSAL approval.

4.4 Trenches shall be kept dry as much as possible during bedding, laying, jointing, testing and inspection of the pipe.

9.0 BEDDING

4.1 Bedding material to be used shall be dune sand in accordance with SAES-A-114

4.2 Dune/Clean sand shall be placed under the pipe, equally along both sides of the pipe and up to height of 300mm above the top of pipe. The sand shall not contain stones larger than 12 mm size

4.3 Bedding materials shall be compacted to the density of the undisturbed site soil materials or as specified on the AFC drawings

4.4 Compacted pipe bed shall provided uniform bearing for the bottom of the pipe’s entire length.

10.0 PIPE LAYING AND JOINTING

4.1 Pipe shall be laid beginning at the lowest point in trenches.

4.2 Pipes with spigot ends shall be inspected for loose gaskets, cracks, and other defects prior to installation. Inspected pipe shall be carefully placed to the line and grade specified on AFC drawings nested in the bedding to provide uniform support to entire length.

4.3 When pipe laying is suspended, the pipe ends shall be sealed to keep soil and foreign materials out.

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MS-P-015 REV.01

11.0 INSTALLATION

4.1 Ensure that all AFC drawings, approved procedures and other necessary documents have been issued to personnel in-charge of the work.

4.2 Submit complete drawings, specifications, certified test reports, Approved Concrete Mix Design and other data covering design, fabrication and erection/installation of pre-cast panels to the Client for review and approval (when required).

4.3 Confirm Method Statements are approved and available to the relevant personnel.

4.4 Secure work permit.

4.5 Erect hard barriers / soft barriers / tapes at the work areas (when required).

4.6 Install approve scaffolding if necessary.

4.7 Excavation and trenching will be done in accordance with approved method statement.

4.8 Pre-cast manhole and catch basin unit shall be installed in approved manner to avoid damage to other adjacent materials

4.9 Pre-cast manhole and catch basin units shall be set true to alignment and level, with joints properly spaced and aligned both vertically and horizontally. Units shall be positioned so that cumulative dimensional error is avoided.

4.10All temporary lifting and handling devices cast into the pre-cast manhole units shall be removed and the damaged surface areas shall be repaired to a uniform appearance in accordance with SAES-S-070. After surface repairs are completed and inspected, joints shall be grouted, cleaned, primed or sealed.

4.11 Installation of oily sewer piping in a new manhole

4.11.1 Ensure the excavated existing OWS has a temporary support prior to connect in the precast manhole.

4.11.2 Prior to the actual installation of OWS line into a new precast manhole please refer attached OWS Layout-Co-Gen reference Drwng. No. RB-770211 as highlighted marked Client Operation will securely close valve, clean and drain the line before handling over to the Contractor.

4.12 Debris shall be cleaned from all floors and adjacent surfaces, and disposed of in an approved manner to the satisfaction of the Client's representative.

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MS-P-015 REV.01 12.0 BACKFILLING

4.1 All blocking, shoring materials and debris shall be removed from the trench prior to backfill.

4.2 Backfill immediately after the pipes have been laid down and bedding is completed.

4.3 Backfill shall be placed in layers of 300 mm less and compacted to a density matching the surrounding soil.

4.4 Each layer shall be compacted to a 95% of the maximum dry density as determined by ASTM D1557. Method A (Modified Proctor Test) or to minimum of 75% relative density as determined by ASTM D4253/4254.

4.5 Excavated materials shall be re-used to the extent possible for this backfill.

4.6 Compaction by water jetting or flooding is not permitted.

4.7 No construction machinery or vehicles shall be allowed to pass over the trench until the trench is backfilled and compacted to prevent damage to the pipe.

13.0 INSPECTION & QUALITY RECORDS

Inspection shall be conducted and recorded in accordance with the job specific Inspection and test plan (ITP).

14.0 SAFETY PRECAUTIONS

The work shall be executed in accordance with the approved safety action plan and Daily safe work plan. Permit shall be obtained prior to any commencement of the work when required. Only trained and experienced workers shall be utilized for installation work.

15.0 ATTACHMENT

4.1 Job Safety Analysis

4.2 Standard Details of Manhole (Drwng No. RA-770028)

4.3 OWS Layout-Co-Generation Area (Drwng No. RB-770211 Sht.001 and Sht. 002)

4.4 OWS Layout-Auxiliary Boiler Area (Drawing No. RB-769985 Sht.001)

4.5 OWS Layout-Common Process Area (Drawing No.RB-769701 Sht.001 and Sht.002)

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connection of oily water sewer line to new manhole rev01

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