Queensland state authorities called on Federal Environment Minister Tony Burke to approve two new gas projects that they said would deliver up to $30 billion worth of fresh investments and bolster the Australian economy.

Santos Ltd is hoping to obtain an environmental approval for its Gladstone liquefied natural gas (LNG) project while British Gas is seeking for a permit on its Curtis LNG project, with both central Queensland explorations promising to produce a combined output of 15.7 million tonnes per annum of LNG, roughly constituting 90 percent of present Australian exports of the gas.

Both the state government and opposition have given their thumbs up on the twin project and Queensland Treasurer Andrew Fraser is hoping that that Mr Burke would do the same once he releases his decision on Friday.

Mr Fraser said that appropriate environmental safeguards must be observed on the two giant undertakings, which he described as "an important export opportunity for the nation for a whole new industry, thousands of jobs and cleaner energies."

He told ABC that it would not be a problem for Queensland if the federal government would require further checks on the projects so long as they were reasonable but he reminded Mr Burke that this is "a once-in-a-generation opportunity to provide a generation of employment."

The federal approval is anticipated amidst recent calls for a moratorium on the coal seam gas industry following episodes of toxic chemical contaminations in Queensland, the latest of which were detected in the Surat Basin exploration wells maintained by the Australia Pacific LNG.

However, Mr Fraser said that a moratorium is not an option for the Queensland government now as he insisted that whatever risks identified on both LNG projects, which he stressed were the norm "in any heavy engineering and any mining process and most business processes," would be manageable.