No.

Conditions with initial filings due prior to commencing construction, or prior to

commencing construction of specified Project component(s)

CPCN

OC2

OC49

Temp

Pump1

Pump2

Tanks

Deact

Trans Mountain Expansion Project 2016

423

1

2

84 For Conditions 19, 122 and 152, an” independent certification body” is an internationally recognized company or organization, such as Lloyd’s Register

or Det Norske Veritas, which is able to certify compliance to statutory requirements. The independent certification body must have expertise in

pipeline integrity. The NEB reserves the right to accept or reject the certificate. In addition, the NEB’s decision is not contingent on the results of the

certificate.

85 For Conditions 19, 122 and 152, “operating conditions” must include the Project-specific operating conditions, possible transient flow conditions, slack

flow conditions, and effects on operating pressure due to temperature changes.

19

Pipeline segment reactivation (Hinton to Hargreaves; Darfield to Black

Pines) – engineering assessment and certificate

Trans Mountain must file with the NEB for approval,

at least 6 months prior to

commencing construction

:

a) an engineering assessment for the above two pipeline segments, in accordance

with Canadian Standards Association (CSA) Z662-15, Clauses 3.3 and 10.15.2; and

b) a certificate with a supporting report issued by an independent certification

body,

84

stating unconditionally that the above two pipeline segments:

i)

are fit for service for the specified operating conditions;

85

ii) meet all applicable requirements of CSA Z662-15; and

iii) will meet the hydrostatic test requirements outlined in CSA Z662-15, Clause 8,

at any time during the certified period.

The certificate must be valid for at least 5 years and be validated on an annual basis

during the certified period.

The supporting report must include the qualifications of the independent certification

body, the justification used to grant the certificate, and the expiry date of the certificate.

X

20

Existing NPS 24 delivery pipeline location

Trans Mountain must file with the NEB,

at least 6 months prior to commencing

construction

, its decision on whether it intends to “relocate” the existing NPS 24

delivery pipeline to the Burnaby Mountain tunnel (i.e., replace it with a new third

pipeline in the Burnaby Mountain tunnel) and, if so, provide:

a) details of any required changes to the design, construction, and operation of the

proposed Burnaby Mountain tunnel;

b) a discussion of the factors Trans Mountain considered in deciding to

replace/relocate the existing NPS 24 delivery pipeline; and

c) an indication of when Trans Mountain expects to apply for NEB approval to

relocate/replace the existing NPS 24 delivery pipeline.

X

21

Transient hydraulic analysis on the existing NPS 24 delivery pipeline

Trans Mountain must file with the NEB,

at least 6 months prior to commencing

construction

, the conclusions of the transient hydraulic analysis undertaken on

the existing NPS 24 delivery pipeline from the Burnaby Terminal to the Westridge

Marine Terminal. The filed conclusions must:

a) demonstrate that the analysis considered the occurrences of maximum surge

pressure in the existing NPS 24 delivery pipeline; and

b) support Trans Mountain’s decision to either retain or eliminate the proposed

relief tank at the Westridge Marine Terminal.

X