Greenpeace has objected to plans to process dioxin-contaminated soil from the Disneyland project at the Tsing Yi incinerator, fearing it may pose a risk to residents' health and the environment. In a public letter to the director of the Civil Engineering Department, the group has demanded that the department drop its plan to incinerate the contaminants found at Penny's Bay at the chemical waste treatment centre. 'Incineration is not likely to fully destroy dioxins, and dioxins may accordingly be released into the surroundings, threatening human life and environment,' said Kevin May, toxics campaigner for Greenpeace China. The Civil Engineering Department said it would respond to Greenpeace's concerns, but maintained incineration was the best way of dealing with the problem. 'Incineration is considered the best option, rather than leaving it in the ground for future generations to worry about,' a spokesman said. Jonathan Wong Woon-chung, one of the waste management experts approached by the government to review options for the disposal of the contaminated material, said he was not concerned by the choice of incineration over other methods. 'I am not a supporter of incineration, but at this time - given that it is a one-off case and having considered all the options - we suggested we should use incineration because it is a more proven technology,' said Dr Wong, an associate professor at the Hong Kong Baptist University's department of biology. He said the Tsing Yi facility was designed to treat this kind of waste, and sought to reassure residents. '[The levels] are within internationally recognised emission standards. At this level they are acceptable and should not pose any health risks,' Dr Wong said. The discovery of 30,000 cubic metres of dioxin-contaminated soil at Cheoy Lee shipyard in Penny's Bay, which is being demolished to build access roads, has seen the decommissioning cost blow out from $22 million to $450 million, including $350 million for decontamination.