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

443

50

High-voltage alternating current (AC) interference

Trans Mountain must file with the NEB,

at least 4 months prior to commencing

construction

:

a) a report confirming that Trans Mountain has achieved an engineered solution to

mitigate possible damage to pipeline segments caused by the power line fault

current from power line footings and other below ground fault current discharge

facilities of B.C. Hydro’s unshielded transmission power lines that are located

less than 30 metres from those segments. The report must include:

i)

a summary of the above-mentioned engineered solution and an explanation

of how the engineered solution adequately mitigates possible damage to the

pipeline;

ii) a list of pipeline segments where mitigation will be applied; and

iii) an explanation of measures taken by Trans Mountain to reach an agreement

with B.C. Hydro towards implementing the engineered solution.

Trans Mountain must provide a copy of the report to B.C. Hydro at the same time

that it is filed with the NEB;

b) a report detailing how Trans Mountain’s design reduces hazardous induced

voltages on its pipeline segments to meet a maximum 15 VAC under all steady

state operating conditions; and

c) a report demonstrating how Trans Mountain would comply with the

requirements of IEEE Standard 80 to limit touch and step potentials to all points

of contacts to pipeline segments due to power line faults or switching surges,

and include a list of affected

pipeline segments.

X

51

Field changes manual for geohazard mitigation

Trans Mountain must file with the NEB for approval,

at least 4 months prior to

commencing construction

, a field changes manual for geohazard mitigation. This

manual must include:

a) decision criteria for implementing mitigation for any geohazards identified

during construction;

b) specific criteria for implementing changes to the designs, grading, special

materials, protective structures, burial depth, installation procedures, erosion

mitigation measures, and monitoring; and

c) details regarding the required qualifications of the field staff that will implement

the manual.

X