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

429

35

Marine Sediment Management Plan

Trans Mountain must file with the NEB,

at least 6 months prior to commencing

construction at the Westridge Marine Terminal

, confirmation whether or not

dredging is required at the Westridge Marine Terminal. In the event that dredging

is determined to be unavoidable during the expansion of the Westridge Marine

Terminal, Trans Mountain must file with the NEB for approval,

at least 4 months

prior to commencing construction

, and also include as part of its Westridge Marine

Terminal Environmental Protection Plan, a Marine Sediment Management Plan. This

plan must include:

a) a summary of any supplemental marine sediment survey results;

b) quantification of the area and the volume of marine sediment to be dredged

along with an explanation of the measures that have been taken to eliminate or

reduce the dredge footprint and volume proposed for disposal at sea;

c) results of sediment plume modelling for any areas to be dredged;

d) options for dredged sediment management, including the volumes of sediment

that will be re-used or disposed of at sea or on land, as well the criteria and

methods for determining how the dredged sediment will be disposed of at sea

or on land;

e) criteria and methods for determining how the dredged sediment will be

managed recognizing that any proposed disposal at sea will only be considered

for approval under the

Canadian Environment Protection Act, 1999

, if it is

demonstrated to be the most technically and environmentally preferable option;

f) confirmation that Trans Mountain will update the Westridge Marine Terminal

Environmental Protection Plan to include any relevant information from the

Marine Sediment Management Plan;

g) details of monitoring that will be undertaken during construction;

h) details of monitoring (both abiotic and biotic parameters) that will be

undertaken during operations, including a discussion on evaluating the level

of contaminants in the marine environment and any changes from pre-

construction levels, as well as a proposed reporting schedule; and

i) a summary of its consultations with Appropriate Government Authorities and

potentially affected Aboriginal groups. In its summary, Trans Mountain must

provide a description and justification for how Trans Mountain has incorporated

the results of its consultation, including any recommendations from those

consulted, into the plan.

X