INSTEAD of finding fish when he dives off Shek O's rocky beach, Liu Wai-ming is more likely to confront rusty steel poles and huge metal frames. On returning to the shore, he has to dodge sharp metal spikes embedded in concrete-splattered rocks. Mr Liu, 35, who has lived in Shek O all his life and has dived there for 20 years, says debris was not a problem until two development projects started. A government-funded pipeline was completed in 1993 and a sewage-treatment plant is now being constructed and due to be finished in mid-1996. The Government says the area will be cleaned after then, but Mr Liu says the 1993 rubbish is still there and some of the damage cannot be repaired. In a recent dive, Mr Liu retrieved two long rusty metal poles, a big metal frame and a broken metal contraption. He said there was also a huge hook and an oil barrel below the surface which he could not lift. Where he entered the water, high above the bay near a sewerage plant tank, the rocks were splattered with concrete refuse and metal spikes. Mr Liu said the beach was also dangerous as spikes up to two metres long were embedded in stones which children could easily access. He said locals supported the sewerage project as it would help clean the water, but the associated waste was unacceptable. Drainage Services Department senior engineer Yeung Wing-tsan admitted he would be worried about the beach if he lived there. But Mr Yeung said when the works were finished it would be cleaner than it was before. The sewerage plant, which will serve the Shek O district, started early last year. The plant is next to the beach but will be enclosed. Mr Yeung said Shek O's Rocky Bay was full of debris and refuse before the works started, and was not good for swimming. He said the project included the reclamation of land for a beach walkway and aimed to clean the beach and water to make it safe for swimming. 'Before that the bay was covered with refuse,' he said. 'You must understand that inevitably at the construction stage there will be some noise, smoke, etc.' Mr Yeung said while the project would end up improving the local environment, its present state justified some concern. But he added they have 'been doing everything we can'.