Shell has submitted further information requested by Mayo County Council on the company's proposal to construct a refinery at Bellanaboy in north Mayo to clean gas from the Corrib field.
Mayo County Council sought the information on Shell's planning application which was made on December 17th last.
Copies of the Environmental Impact Statement (EIS) accompanying the original planning application available to the public were incomplete and Mayo County Council was forced, on a number of occasions, to contact members of the public to say that Shell had omitted information.
The council eventually decided to extend the period for public consultation and then requested further information from Shell.
The public now has five weeks to make submissions on the new information and the council must make a decision on the planning application by May 6th.
The Corrib project has been dogged by delays. This is the third planning application by the Corrib consortium of Shell, Marathon and Statoil.
A decision to grant planning by Mayo County Council was overturned by An Bord Pleanála last year following the longest oral hearing in the history of the State.
Concern was expressed then over the storage of 600,000 cubic metres of peat onsite. The new application proposes to remove 450,000 cubic metres of peat to a nearby Bord na Móna site.