Sempra Infrastructure has inked a sales and purchase agreement (SPA) with Engie SA, shoring up offtake for the first phase of its Port Arthur LNG project near Houston and agreeing to source supplies from producers whose gas has been certified by an independent third party.

Sempra could supply France’s Engie 0.875 million metric tons/year (mmty) for 15 years on a free-on-board basis, according to the agreement disclosed Tuesday. Sempra could also lean on its recent partnership with Williams, as Engie stipulated cargoes would come from producers with independent carbon intensity certification processes in place.

As part of the agreement, the firms could also work to further mitigate greenhouse gas emissions from the 13.5 mmty first phase of Port Arthur facility proposed...