In the first round of waste disposal, the emission of particulate matter (PM), sulphur dioxide, nitrogen oxide, carbon monoxide, hydrogen chloride, hydrogen fluoride and total organic carbon from the disposal plant was found to be within the standard limits, as per the State Pollution Control Board.According to the state government, the waste from the Union Carbide factory included soil from the premises of the defunct unit, reactor residue, sevin (pesticide) residue and naphthalene.These include waste and “semi-processed” waste.Scientific evidence has shown that the effect of chemicals like sevin and naphthal in the waste has now become “almost negligible”, the board has said.There is currently no trace of Methyl Isocyanate (MIC) gas in the waste and it does not contain any radioactive particles, according to the board.On the intervening night of December 2 and 3, 1984, the highly toxic MIC gas leaked from the Union Carbide’s insecticide factory.
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