Grit blasting at the Palumbo Shipyard will be allowed for a limited period and subject to strict conditions after the planning authority yesterday revised the ban imposed in December.

The Malta Environment and Planning Authority’s Environment Protection Directorate will allow grit blasting to be used on a particular ship that will dock in the coming weeks.

Grit blasting will only be permitted in dock six, which is below Corradino Heights and the furthest away from residential areas. Other conditions include limiting the pressure of the blast and taking note of the wind direction when blasting is scheduled.

The shipyard was stopped from carrying out grit blasting operations after Cospicua residents and yacht owners complained of airborne and sea pollution. Palumbo had said grit blasting was essential to its operations.

Mepa said it would closely monitor this month’s grit blasting operation to assess whether the mitigation measures adopted were adequate and whether more were required.

Earlier this year, Palumbo submitted an application for an environmental permit, which is being evaluated. The permit will eventually be subject to public consultation.

Grit blasting consists of copper particles blasted onto ships to remove paint and rust, leaving a smooth and clean surface. Although it is not illegal in itself, the method can be called into question if its residue pollutes the environment or causes a health hazard, especially if the tiny specs of paint, rust and metal become airborne.