Table 40 summarises the environmental impacts due to mismanagement of TPP and the required mitigation measures.
Observations |
Causal factors |
Required mitigation measures
(to be implemented by TPP with the regular monitoring of post project monitoring task force (appointed by the district administration involving all stakeholders’ representatives)) |
WATER |
- Contamination of stream water
|
- Leakage from coal storage yard
- Direct discharge of effluents
- Discharge of coal mix water
- Sustained seepage and frequent overflow from ash pond
- Microbial contamination - Sewage from labour colony, open defecation in the vicinity of labour colony (the presence of feacal coliform bacteria in higher proportions further substantiates, mismanagement of sewage at TPP and also at labour colony).
- Dumping of organic solid wastes
|
- Appropriate containment of coal and coal mix water by redesign of storage yard with drains and rainproof shelter
- Proper impervious liner for ash pond
- Treatment of effluents and only treated water to be let into surface water bodies (after passing through wetlands with native species of grass etc.)
- Installation of sewage treatment
- Segregation and treatment of solid wastes
- Strengthen the regulatory mechanism at local levels with adequate and trained professionals
|
- Contamination of ground water
|
- Salinity intrusion
- Leakage from pipe
- Leakage of saline water due to improper storage
- Deposition of salt on vegetation and subsequent discharge to soil with precipitation
- Hydrocarbon inflow
- Acidic salts like sulphates
- Heavy metal leaching
- Sewage from labour colony, open defecation in the vicinity of labour colony
|
- Avoiding supersaturated saline mist discharge from cooling towers
- Leakproof salt tolerant pipe (water intake system)
Proper storage of salt water,
Remove salinity from water before use
- Bioremediation of hydrocarbon based waste
- FGDs and other desulphurization techniques (sulphur scrubber) for arresting sulphur
- Treatment of coal mix water containing sulphates and heavy metals (bioremediation, ion exchange resins)
|
- Ground water table fluctuation
|
- Over exploitation of ground water
|
- Rainwater harvesting through surface water harvesting and reduced dependence on ground water at TPP
- Implementation of Sujala Dhara programme to provide drinking water to the villages through the construction water storage tanks (with adequate safety and catchment conservation measures)
|
AIR |
- Salt deposition on leaves
|
- Supersaturated saline mist discharge from cooling towers
|
- Avoiding supersaturated saline mist discharge from cooling towers
|
|
- Particulate matter dispersion
- Transport of fly ash in open trucks
- Dumping of dry ash in ash pond
|
- Install functional ESPs
- Ash transport through closed conveyor belts
- Alternate use of fly ash
- Wet dumping of fly ash
|
|
- Incomplete combustion of coal
|
- Improved thermal efficiency
|
|
- Improper air pollution control
|
- Install efficient FGDs and mechanism for deNOx
|
LAND |
|
- Inappropriate land stabilization, soil management (exposed slopes) at TPP site
|
- Remediation through vegetation (grasses and shrubs as soil binders)
- Slope stabilization through embankments
|
- Soil microbial contamination
|
- Open defecation (labour colony)
- Discharge of effluents to streams
- Discharge of labour colony sewage
|
- Provide appropriate sanitation facility
- Treatment of effluents and sewage
|
|
- Supersaturated saline mist discharge from cooling towers
- Leakage from pipes– degradation of land, enhanced salinity has made soil unproductive and unfit for agriculture
- Leakage of saline water due to improper storage
- Deposition of salt on vegetation and subsequent discharge to soil with precipitation
|
- Avoiding supersaturated saline mist discharge from cooling towers
- Leakproof salt tolerant pipe (water intake system)
- Proper storage of salt water
- Remove salinity from water before use
- Scientific assessment of lands affected by salinity for restoring the land (fit for agriculture and sustain livelihood of people)
- Beside the compensation for loss of crop for the particular year, it has to be extended till the salinity affected cropland are restored
|
|
|
- Atleast 33% vegetation cover at the project site as per the environment norms of GoI and also as per the stipulations of environment clearance
|
VEGETATION |
- Leaf burning, drying of leaves
|
- Salt deposition on leaves
- Salinity in subsoil root systems
|
- Avoiding supersaturated saline mist discharge from cooling towers
- Leakproof salt tolerant pipe (water intake system)
- Proper storage of salt water
- Remove salinity from water before use
|
- Chlorosis and necrosis
- Mottling and dwarfing
- premature fall of coconut
- non-flowering of jasmine
- loss of Thulasi (Ocimum sanctum)
- decrease in yield of paddy, banana, areca
- reduced productivity of fodder crops (local grass, herbs)
|
- Phyto-toxicity due to salinity, SOx, NOx and heavy metals
|
- FGDs and other desulphurization techniques (sulphur scrubber) for arresting sulphur
- Treatment of coal mix water containing sulphates and heavy metals (bioremediation, ion exchange resins)
|
- Particulate deposition on leaves
|
- Absence of multitier vegetation
|
- Plant appropriate saplings to mitigate dust and noise
|
INFRASTRUCTURE |
- Degradation of tin sheets, vehicle chassis, dish antenna, well pulleys, wire mesh of wells, transmission lines, railway tracks, fencing, roof tiles,
- Flake formation in distemper for walls
|
- Salt deposition and consequent corrosion
- SOx
|
- Avoiding supersaturated saline mist discharge from cooling towers
- FGDs and other desulphurization techniques (sulphur scrubber) for arresting sulphur
|
HUMAN HEALTH AND LIVELIHOOD |
- respiratory ailments like asthma, alveolar infections, bronchitis, etc.
- eye irritation and skin itching Skin rashes, lesions, nail deformation (Onychodystrophy),
- Digestive disorder
|
- Respirable suspended particulates
- Leakage/discharge of hydrocarbon based substances
- Contamination of surface/ground water bodies and soil from coal mix water due to fugitive dust suppression or rainfall run-off. Exposure of coal to air and water results in the oxidation of the pyrite to sulphate and sulphuric acid, causing acid mine drainage.
- Contamination of water – SOx, heavy metals,
- Fecal contamination
- Allergenic responses
|
- Functional ESPs
- FGDs and other desulphurization techniques (sulphur scrubber) for arresting sulphur
- Avoiding supersaturated saline mist discharge from cooling towers
- Bioremediation for heavy metals
- Treatment of effluents and sewage
- Using closed conveyor belts for transfer of fly ash
- Wet disposal of ash
- Multitier and well maintained green belt around the TPP as well as ash pond
|
- Conversion of water tanks (constructed under Sujaladhara programme for supplying drinking water to nearby villages – Santhur).
- Livelihood of weaker section of the society is threatened with poor or no flowering of jasmine, plantain leaves, thulasi, etc.
- Reduced yield of agricultural (paddy, etc.) and horticultural (Areca, coconut, cashew, tamarind, Guava, etc.) crops
- Scarcity of water suitable for drinking and other domestic activities
- Forced displacement without appropriate rehabilitation of native forest dwellers
- Improper valuation of ecosystem goods and services while compensating the loss
|
- Conversion of water tank/pond to ash pond, depriving local people of their basic need – clean drinking water
- Phyto-toxicity
- Effluent contaminating water sources
- Indifferent attitude/apathy of TPP officials towards local people
- Inhuman district authorities (forced eviction of local inhabitants during high monsoon at midnight) and insensitive to environment contamination complaints.
|
- Restore/ construct water pond/tank with adequate safety measures to provide drinking water to the villages
- FGDs and other desulphurization techniques (sulphur scrubber) for arresting sulphur
- Treatment of coal mix water containing sulphates and heavy metals (bioremediation, ion exchange resins)
- Avoiding supersaturated saline mist discharge from cooling towers
- Sensitise district authorities (including DC) of environmental ethics, valuation of ecosystem services and goods
- Issue of CFO (Consent for continued operation) by regulatory authorities only on compliance of environmental norms
- Environmental Management Cell (EMC) with qualified environmental professionals for regular monitoring and environmental auditing
- Capacity building of the district administration of India’s environmental legislations pertaining to air, water, environment, forest dwellers rights, fundamental rights of the citizens, Biodiversity act, MSW rule, etc.
- Strengthen the regulatory mechanism at local levels with adequate and trained professionals
|
LIVESTOCK |
- Ailments related to skin, respiratory tract, etc.
- Miscarriages and decline in milk yield
- Fodder – due to uptake of heavy metal has become non-palatable
- Fodder – reduced grass productivity due to salt as well as ash dust deposition
- Non-palatable grasses, and other herbs due to contamination
- poultry death due to consumption of effluent mixed stream waters
|
- Respirable suspended particulates
- Leakage/discharge of hydrocarbon based substances
- Contamination of surface/ground water bodies and soil from coal mix water due to fugitive dust suppression or rainfall run-off. Exposure of coal to air and water results in the oxidation of the pyrite to sulphate and sulphuric acid, causing acid mine drainage.
- Contamination of water – SOx, heavy metals,
- Phyto-toxicity
- Effluent contaminating water sources
|
- Avoiding supersaturated saline mist discharge from cooling towers
- Bioremediation for heavy metals
- Treatment of effluents and sewage
- Functional ESPs
- FGDs and other desulphurization techniques (sulphur scrubber) for arresting sulphur
- Using closed conveyor belts for transfer of fly ash
- Wet disposal of ash
- Multitier and well maintained green belt around the TPP as well as ash pond
|