URBAN Council chairman Dr Ronald Leung Ding-bong, playing down the controversy over the Hong Kong Stadium, said he believed he had handled the issue competently. ''I don't think I need to resign. I think I've handled it very well,'' Dr Leung, the chairman of the stadium's board of governors, said yesterday. He defended the decision by the Urban Council to allow Alan Tam Wing-lun to perform all three of his concerts a week ago, even though the noise from the first had exceeded Noise Control Ordinance limits. Dr Leung said an emergency meeting of Urban Councillors reached the decision, which he said protected the interests of the community as a whole. However, he reiterated that the stadium would not accept any further bookings for concerts before the noise problem was fully addressed. So far, the Environmental Protection Department has issued four court summons to Wembley International, the firm which manages the stadium, over excessive noise. Dr Leung said the Urban Council would investigate why it was not told of the potential noise problem at an early stage of the re-development of the stadium. The Environmental Protection Department told the Urban Services Department about possible noise problems in May 1992, but the council was not told until February this year - just before the stadium re-opened.