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The incident, which occurred on March 19, was previously referred to by Bechtel as the first leak of its kind since production started in December.
The leak also occurred during a scheduled two-week shutdown from March 10 to undertake maintenance and commissioning work.
Bechtel has not provided any comment on the leak since its first statement not long after the incident.
"It is currently understood to have originated from a flanged component in one of the LNG pumps in the tank, which in turn triggered a local gas alarm alerting the plant operations staff to take appropriate action," Bechtel Gladstone general manager Kevin Berg said at the time.
"The pump was powered down and isolated from the system, emptied of LNG and corrective action is expected over the coming days in working with the LNG pump supplier."
Meanwhile, Workplace Health and Safety Queensland did not reveal any more details about its investigation into the leak according to the Gladstone Observer.
"There are many potential causes of a leak in a processing plant," the authority told the newspaper.
"The operator of a major hazard facility is required to identify all possible causes and implement controls that eliminate or reduce the risk as reasonably practical."
However, production was not significantly impacted from the incident with QCLNG's 10th LNG cargo currently being loaded.
