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Scope of work - Pipe Removal and Custody Transfer

The scope of this section is to transfer custody of the pipe sample including soil samples and any foreignmaterials to the NTSB fo r mechanical and metallurgical testing. The mechanical and metallurgicaltesting protocols shall be determined by the NTSB in consultation with PHMSA and are outside the

scope of this document. The attached document details ho w to Preserve major pipeline componentsremoved due to failure until it is determined if an analytical investigation is required. In this case th eNational Transportation Safety Board will investigate or have inve stigated and establish the facts,circumstances, and cause or probable cause of the pipeline accident in which there is a fatality ,substantial property damage, or significant injury to the environment.

Regulatory Requirements

Title 49. Transportation -Subtitle II. Other Government Agencies -Chapter 11. National Transportation

Safety Board -Subchapter I. General

Company StandardsBOOK

1: 02-02-04 Investigating Piping FailuresBOOK 3: 06-03-22 Removing Pipe fo r Inve stigat ion

Specific requirementsPrior to cut out, we will survey the profile of the pipe and visually inspect the pipeline.Cold Cuts will identify approximately 140 ft fo r removal. The total 140 ft will be cut into 3 sections. Onethat is sent to NTSB laboratories and the other 2 will be evaluated as per Enbridge policy and PHMSA

direction.

For the Segment destined fo r NTSB Pipeline integrity in conjunction with the NTSB will identify the endsof th e cut fo r Pipe removal and sending to NTSB labo rator ie s. It is anticipated that this section will be

approximately 20 feet in length. Remove this pipe section fo r documentation, -cleaning and preparationfo r shipping. The cleaning will be done with absorbent material to mop up free liquid ' inside and outsideof the pipe. There will be no blasting of this section.It is planned to ship in a 30 foot crate and the pipe needs to be supported every 6 feet.

The 2 remaining cut out sections that will no t be sent to NTSB will be cleaned to expose the long seamand girth welds. These sections can be blasted as per Enbridge procedures. The need fo r additionalcleaning of these pipe sections further will be dictated by what we find when they are exposed. NDE willbe conducted on the long seam and girth welds .

Pipe destined fo r Washington can be transported in sections not exceeding 20 ftThe Pipe containing the fai lure location needs to be a minimum of XX ft on each side of the failure

Each section needs to be housed in a separate crate.Crates will be delivered to NTSB facilities in Washington .Records show that the rupture is on GWD 217720.

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BOOK 3: PIPELINEFACILITIES

f£l NBRIDGE

Purpose

Related Standards

Responsibilities

Requirements

Procedure

SectIon

PROCEDURES06-03-22

Subject Number

SubjectRemoving Pipe for Investigation

To cut out pipe for investigation following a failure.

CompanyBook I: General Reference• 02-02-04 Investiga ting Piping Failures

Regions are responsible to determine th e type of repair at a failure siteafter considering several factors (e.g. , location, drainup , safety).

Preserve major pipeline components removed due to failure until it isdetermined if an analytical investigation is required. Only AuthorizedPersonnel will be permitted to inspect the failed component at site.Management approval is required before releasing the failed componentto any other person or authority.

Removing PipeI. Before removing pipe components, obtain approval from regional

management.

NOTE: For some incidents, legislation requires that site conditions arenot disturbed until government agencies comple te their investigation.

2. Insert hoses into th e pipe to drain up liquids and loosen residual s.• If the rupture opening is not wide enough to accommodate the

hoses (a) contact Pipeline Integrity to confirm where to cutthe pipe, or (b) cut the pipe at least 30 em (12 in.) from therupture opening to ensure the fracture surfaces are notdamaged.

NOTE : The point where the failure initiated must not be damaged. Thisusually coincides with the widest point o f a rupture.

3. Cover fracture surfaces with a split rubber hose to prevent damageand to preserve features for examination during the failureinvestigation. '

4. Before removing major pip eline components:• leave the pipe coating intact• identify or sketch detailed as-builts• complete the Pipeline Failure Field Notes• mark or record the upstream end and the 12:00 o'clock

position on the pipe

March 31, 2009 Page 1 of 2

This document Is uncontrolledunless contained within8 Control/ed CopyO&MP Manualor when viewedon the Pipeline Safety ComplianceSharepoint website.

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06-03-22Removing Pipe for Investigation BOOK3

Records

•

•

mark the long seam o'clock position (lookin g downstream)on the pipemark the chainage and fajlure/ leak date on the pipe

5. After removing damaged pipeline components:• protect fracture surfaces using grease• cover and move the components to a safe storage area for

prot ection from weathering

Pipeline Failure Field NotesRecord 'as found ' conditions during all stages offailure investigation.Include digital pictures, descriptions , sketches of the damaged equipmentand exact locatio n of the damage.

Retain Pipeline Failure Field Notes in Pipeline Integrity permanently.

Page 2 of 2 March 31, 2009This document is uncontrolledunless contained within8 Control/ed CopyO&MPManual or w hen viewedon the PipelineSafety ComplianceSharepointw ebsite.

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