The Canadian Environmental Assessment Agency said Oct. 14 that it is deciding whether a federal environmental assessment is required for the proposed Grassy Point LNG Project in British Columbia.
To assist it in making its decision, the agency is seeking comments from the public on the project and its potential effects on the environment. The government of British Columbia has requested the substitution of the B.C. environmental assessment process for the federal process if it is determined that an environmental assessment is required. The agency is also seeking comments on this request. Written comments must be submitted by Nov. 3.
The proposed Grassy Point LNG Project is located 30 kilometers north of Prince Rupert, British Columbia. Woodside Energy Holdings Pty Ltd. proposes to construct and operate this liquefied natural gas (LNG) export facility. As proposed, the project would convert processed natural gas, delivered by a third party pipeline, into LNG for export. Two main options are being considered for the project: an onshore LNG facility and a nearshore facility, each incorporating LNG trains, associated services, and marine facilities. The operational phase of the proposed LNG facility would last at least 25 years, with full build-out capacity expected to be 20 million tonnes per year.
This project will use roughly 1,000 MW of power, with the actual source of that power still up in the air, said a project report from Woodside. The Grassy Point LNG facility is to be constructed and operated in two distinct phases.
- Phase 1 involves the construction of LNG trains, with an LNG capacity of between 6 and 15 million tonnes per year of LNG, supporting infrastructure including jetties and a materials offloading facility, power generation, water supply, sanitary waste treatment, access roads and workforce accommodation.
- Phase 2 is expected to involve the installation of additional LNG trains and associated supporting infrastructure at the site up to the nominal 20 million tonnes per year of LNG. The capacity of each train is expected to be between 3 and 6.5 million tonnes per year.
“The Project requires a large consistent power supply to support the liquefaction process, associated utilities, and administration complex and workforce accommodation,” said an August 2014 project report that Woodside filed with the British Columbia Environmental Assessment Office. “The estimated power requirement is approximately 1000 MW. Typically worldwide LNG liquefaction plants produce their own energy utilising feed gas and waste gas streams from the facility as fuel gas, this is to ensure the reliability of energy supply for the facility.
“The LNG process typically incorporates gas turbine driven rotating machinery, supported with additional electrical or steam drives. The electrical power could be produced on-site with gas turbine driven generators potentially with additional steam driven generation turbines. There is scope to investigate LNG process designs that utilise process drives that are entirely electrically driven. This opens up the opportunity to consider highly reliable external suppliers for energy supply. A decision is yet to be made regarding the proposed power source, whether it is produced by the LNG facility itself, externally supplied or a combination of the two.”