National_Energy_Board_Report Page441

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

National Energy Board

422

Valve locations on Line 2

Trans Mountain must ﬁle with the NEB for approval,

at least 6 months prior to

commencing construction

, its ﬁnal valve location assessment for Line 2. This

assessment must include:

a) a table showing each valve’s location, function, and description (the description

must include valve type, valve closure time, and whether the valve can be remotely

controlled by the control centre);

b) conﬁrmation that the valve closure times provided in a) will not cause unsafe

transient pressures according to the ﬁnal transient analysis, along with a summary

of the analysis;

c) calculated volume release and elevation plots in a format similar to that provided

by Trans Mountain in its Oil Spill Outﬂow Model Results for Line 2 for May 2014

Route (Filing A3Z8G6);

d) clariﬁcation of how the Outﬂow Volume Score for Non-Watercourse Intersects

(Sv,Nonwatercourse) is considered in identifying and prioritizing pipeline

segments for valve optimization;

e) for each 5-kilometre-long section of Line 2, information demonstrating that the

release volumes are minimized to manage risks within the section to a level that is

As Low As Reasonably Practicable (ALARP), based on the valve locations provided

in a);

f) an outﬂow volume versus chainage graph illustrating the eﬀectiveness of the

valve locations provided in a) showing the outﬂow limit in a format similar to

that provided in Figure 4 of Attachment 2 to Trans Mountain’s response to NEB

Information Request No. 3.050b) (Filing A4H2D7);

g) mitigation measures for the locations shown to exceed the outﬂow limit in the

graph provided in f); and

h) full-bore release and spill extent mapping that identiﬁes and plots all geohazards

with a Frequency of Loss of Containment (FLoC) greater than 10-

events per year

after mitigation identiﬁed by Trans Mountain at the time of its submission, in a

format and scale similar to the maps provided by Trans Mountain in Filing A3Z8G7

Valve locations and upgrades – Line 1

Trans Mountain must ﬁle with the NEB for approval,

at least 6 months prior to commencing

construction

, its ﬁnal valve location assessment for Line 1. This assessment must include:

a) a plan for upgrading existing manual block valves to automated or remotely operable

valves, and a plan for adding new valves, including initiation and completion dates for

the required activities;

b) a table showing each valve’s location, function, and description (the description

must include valve type, valve closure time, and whether the valve can be remotely

controlled by the control centre);

c) conﬁrmation that the valve closure times provided in b) will not cause unsafe

transient pressures according to the ﬁnal transient analysis, along with a summary of

the analysis;

d) calculated volume release and elevation plots in a format similar to that provided by

Trans Mountain in its Oil Spill Outﬂow Model Results for Line 2 for May 2014 Route

(Filing A3Z8G6);

e) an outﬂow volume versus chainage graph illustrating the eﬀectiveness of the valve

locations provided in

b), in a format similar to that provided in Figure 4 of Attachment

2 to Trans Mountain’s response to NEB Information Request No. 3.050b) (Filing

A4H2D7); and

full-bore release and spill extent mapping that identiﬁes and plots all geohazards

identiﬁed by Trans Mountain in its Natural Hazards Management Program or

otherwise, at the time of its submission, in a format and scale similar to the maps

provided by Trans Mountain in Filing A3Z8G7; and

g) the associated Line 1 risk assessment used to determine the new valve locations and

planned valve upgrades in (a).