29 October 2004 Diesel Spill in Southeastern B.C. Radium - A spill of diesel fuel from a train derailment near Radium is much larger than first reported, says the Ministry of Water Land and Air Protection.   The spill was caused when a CP Rail train derailed north of Radium on Wednesday, in the environmentally sensitive Columbia Wetland Wildlife Management Area - an important bird habitat.   A cleanup team had originally estimated the spill at 150 imperial gallons.   Provincial officials now confirm the spill is at least 10 times as large as the original estimate, and say a thin slick of diesel has spread over a wide area.   Ellen Zimmerman of the East Kootenay Environmental Society says she's concerned the spill has spread downstream and could impact on fish and wildlife habitat.   But the government response team says it appears the fuel slick is very thin, and will have little, if any, impact on the environment.   CP Rail spokesperson Ed Greenberg says the company will do anything necessary to ensure the Columbia Wetlands are not damaged.   "Our number one concern is the safety and security of area residents, as well as responding to any potential environmental impacts."   Officials say most of the spill has now been contained, and CP is footing the bill.