A former deputy director of housing was named by a colleague yesterday as being in charge of a Tin Shui Wai public housing project found to have defective piling. Assistant Director of Housing Joseph Kong Churk-fan said: 'If [I have to say who] should be held accountable for [the project] overall, it should be the then senior assistant director of housing, that is Stephen Poon Sing-chi.' But Mr Kong did not say whether Mr Poon should be held responsible for the piling problem in Tin Shui Wai. He also told the Legco inquiry into a spate of piling scandals that the then assistant director of housing, Chan Kwai-lung, was supposed to be responsible for the Tin Chung Court project, from the awarding of contracts to completion. Mr Poon, senior assistant director of housing in 1995 and deputy director of housing in 1997, was Mr Chan's boss. He testified last week. Mr Kong said he was not involved with awarding the piling contracts, monitoring the overall project or checking the piling after completion. He said his job was to decide whether to adjust the design in accordance with advice given by structural and civil engineers. 'Being the design team leader, I was responsible for the overall design rather than the foundations,' he said. 'I am surely unable to monitor other professions which have their own training and knowledge.' The inquiry is probing problems at public flats in Tin Shui Wai, Sha Tin, Tung Chung and Kwai Chung. The Tung Chung and Kwai Chung cases involved sub-standard iron bars while the Tin Shui Wai and Sha Tin cases concern defective pilings.