A financial expert and a marine ecologist will be given seats on the panel proposed to review the troubled project to dig tunnels to dispose of urban sewage. The panel will also consider whether the work done so far should be aborted, according to new government proposals. Legislators had fiercely criticised the small membership of the international review panel. The Government had previously wanted to have five members, two of whom had sat on a similar review panel five years ago. The expanded membership will see seven experts review what has been done and decide what should be done. It will be asked to consider 'whether the works should proceed as planned, or be suspended or be aborted', according to the Planning, Environment and Lands Bureau. The document, to be discussed at next Monday's Legco environmental affairs panel meeting, says a financial expert is needed to give 'advice on cost estimates and financial evaluation of alternative schemes'. Green group the Conservancy Association said the panel should look into the impact of cross-border pollution. So far more than $6 billion has been poured into the first stage of the Strategic Sewage Disposal Scheme. The work, which involves digging seven tunnels as deep as 150 metres underground to Stonecutters Island, has been hit by delays for more than four years because of drilling difficulties. At Monday's meeting, lawmakers are also expected to be consulted on proposed amendments to noise-control laws. Last year there were 2,200 and 2,400 complaints about construction and industrial noise respectively. The numbers of convictions were 299 and 111 respectively.