In March and April this year, two major fires broke out near the chemical storage area. Tonnes of toxic chemicals and waste tarry residues remain on the premises of the plant, now the property of the government.

More seriously, the tarry residue is contaminated with mercury from empty seal pots dumped in the waste, according to a source, who wishes to remain anonymous.

The mercury-filled pots were part of the US-based transnational's `Sevin' pesticide manufacturing plant's chemical reactor, and crumbled from disuse. While the mercury was scooped up, the pots were carelessly dumped.

As a result, a proposal to use the tarry residues as fuel for cement kilns had to beabandoned. Mercury is dangerously volatile and one of the most toxic of chemicals. Long-term exposure to mercury permanently damages the brain, kidneys and even the foetus, posing a serious threat to poor communities living around the plant.

Already people in the slums have been warned not to drink water from some 200 shallow tube-wells identified with a red board by the state government. Since there's no other source of water, they drink from the tubewells. ``Where else can we get water,'' said a resident of Atal Ayub Nagar, lugging water from a tubewell.

An estimated 10,000 people live in the shadow of the Union Carbide plant, in Atal Ayub, Annu Nagar, Nawab Nagar and New Arif Nagar. Multinational Monitor charges Union Carbide, which has a reputation of little regard for the environment or worker safety, of never having owed up responsibility for the tragic gas leak in Bhopal on the night of December 3, 1984.

In the United States, Carbide's long involvement in the research and development of nuclearweapons, the Y-12 plant at Oak Bridge built in 1943, and in uranium milling and mining are plagued with problems of toxic waste disposal.

In 1977, a declassified Department of Energy report revealed that 2.4 million pounds of mercury had been released into the ground, water and air between 1950 and 1963, when the plant was still under Union Carbide management.

The waste disposal system of Carbide in Bhopal was highly suspect even before the disaster. Waste was dumped in open pits and later into solar evaporation ponds. Toxic effluents were discharged for many years into the open sewage drains nearby.

The plastic lining of the solar evaporation ponds (to prevent seepage) was often taken away by indigent slum-dwellers who used it to cover the roofs of their houses. Attempts to landfill the ponds only increased the risk of soil and water contamination.

A report of the PHE (Public Health Engineering) Department in Bhopal, dated October 28, 1996, (which has been leaked recently) shows the groundwater iscontaminated with bacteria and there is a heavy presence of chemicals.

A press report to this effect was published in January 1988. Ten samples were collected from J P Nagar, Atal Ayub agar, Arif Nagar, Chhola and Kainchi Chhola all situated close to the Union Carbide factory on November 26, 1996, and tested at the State Research Laboratory.

All samples were subjected to both bacteriological and chemical analysis. The COD (Chemical Oxygen Demand) value in groundwater is zero but the samples tested here had COD values between 45 mg/l and 98 mg/l as opposed to the WHO standard value of COD for natural water which is 6 mg/l.

The report said that samples from tubewells in other parts of Bhopal were also examined but chemical contamination was found only in areas near the Carbide plant. Water from the tubewells in these areas was tested five years ago and even at that time, there was evidence of chemical contamination.

``It is established that this pollution is due to chemicals used in the Union Carbidefactory that have proven to be extremely harmful for health. Therefore the use of this water for drinking must be stopped immediately.''

In April 1990, the Bhopal Group for Information and Action (BGIA) sent samples to the Citizen's Environmental Laboratory, Boston, to analyse sediment from the waste storage area abandoned by the company, surface soils near the plant and drinking water from the adjacent community.

High levels of toxic materials were found in the samples from the waste storage area and another highly toxic substances, dichlorobenzene was found in the drinking water. Polynuclear aromatic hydrocarbons (PAH), a group of cancer causing agents, were found in the waste area, apart from phthlates which were detected in the surface soils and in the waste pond.

In 1985, a few months after the accident, the three large effluent ponds were already posing a threat to local cattle and people were complaining of water contamination.

The Bhopal Gas Peedit Mahila Udhyog Sangathan of survivors of thegas accident and the BGIA have repeatedly drawn the attention of authorities to the environmental damage caused by the Carbide plant. The reports of the government agencies remain inaccessible to the people who live without basic amenities.

Despite mountains of evidence, the state government is dragging its feet on a pollution clean-up. The poison clouds of gas from the Union Carbide plant is not its only toxic legacy.