The fuel spill has contaminated an area around a stream

Air quality checks in the area may be extended to the inside of homes around Hazelbeach.

A clean-up operation has been on-going for a week since around 500 tonnes of kerosene leaked from a storage tank at the Petroplus site near Milford Haven.

The Environment Agency said the spillage had contaminated a stream, beach and cliffs.

It said to date the operation appeared to have minimised the impact.

There have been calls for measures to be put in place to prevent similar leaks in the future as there was a previous spillage from the tank in 2001.

'Oil contamination'

Around 500 tonnes of jet kerosene leaked from a storage tank on 2 August.

The Environment Agency said it was told by Petroplus on Tuesday afternoon that oil was contaminating the groundwater near the tank.

Petroplus added water to the tank to seal the leak and started pumping out the contaminated groundwater.

Around 500 tonnes of fuel leaked from a storage tank

But the following morning, the agency received reports of oil contamination of Hazelbeach stream which borders the Petroplus site, near the village of Llanstadwell.

The agency added the oil leak was "causing a localised visual and odour impact from oil contamination on the Hazelbeach in the vicinity of the stream".

Petroplus, the Environment Agency, the Countryside Council for Wales and Pembrokeshire Council are all involved in a clean-up operation and the council has put up signs warning of oil contamination on the beach.

The Environment Agency said the impact was limited to an area around Hazelbeach stream but said steps needed to be identified and put in place to prevent a re-occurrence.

Councillor Ken Edwards said he believed further measures were needed.

"This community is not just going to sit on this and just wait for the next event," he added.

"We're concerned that this matter has got to be sorted out within the next six months."

Friends of the Earth Cymru spokesperson Gordon James called for legal action to be taken.

"There is no excuse for this sort of polluting incident within an area of high environmental value such as the Milford Haven waterway," he said.