Natural gas is brought to the surface from deep gas fields onshore or beneath the seas off Trinidad. It is transported by pipelines onto the shore and then overland for some 50 miles to the plant in Point Fortin, Trinidad. At the plant, the natural gas is processed to remove impurities, water, gas, liquids and carbon dioxide.

Atlantic uses the Phillips Optimised Cascade Process developed by Phillips Corporation, that was first used successfully at the Phillips plant in Kenai, Alaska.