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EXECUTIVE SUMMARY OF Environmental Impact Assessment Report FOR GADARWARA SUPER THERMAL POWER PROJECT, STAGE-I (2 X 660 MW), Tehsil Gadarwara Dist: Narsinghpur, M.P. Document No.: 9572/999/GEG/S/002 Prepared by: MANTEC CONSULTANTS PVT. LTD. 805, VISHAL BHAWAN, 95, NEHRU PLACE, NEW DELHI-110 019 PH – 011-26429294/5/6, FAX – 26842531/26463665 E-mail: [email protected] , [email protected] April, 2012 M/s. NTPC Limited New Delhi (A Govt. of India Enterprise)

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Page 1: OF Environmental Impact Assessment Report SUMMARY OF Environmental Impact Assessment Report FOR GADARWARA SUPER THERMAL POWER PROJECT, STAGE-I (2 X 660 MW), Tehsil Gadarwara Dist:

EXECUTIVE SUMMARY

OF Environmental Impact Assessment

Report

FOR GADARWARA SUPER THERMAL POWER PROJECT,

STAGE-I (2 X 660 MW), Tehsil Gadarwara Dist: Narsinghpur, M.P.

Document No.: 9572/999/GEG/S/002

Prepared by:

MANTEC CONSULTANTS PVT. LTD. 805, VISHAL BHAWAN, 95, NEHRU PLACE, NEW DELHI-110 019

PH – 011-26429294/5/6, FAX – 26842531/26463665 E-mail: [email protected], [email protected]

April, 2012

M/s. NTPC Limited New Delhi

(A Govt. of India Enterprise)

Page 2: OF Environmental Impact Assessment Report SUMMARY OF Environmental Impact Assessment Report FOR GADARWARA SUPER THERMAL POWER PROJECT, STAGE-I (2 X 660 MW), Tehsil Gadarwara Dist:
Page 3: OF Environmental Impact Assessment Report SUMMARY OF Environmental Impact Assessment Report FOR GADARWARA SUPER THERMAL POWER PROJECT, STAGE-I (2 X 660 MW), Tehsil Gadarwara Dist:

Doc. No: 9572/999/GEG/S/002 Rev. No.: 0 Rev. Date: 23.04.2012

Executive Summary of Draft Environmental Impact Assessment

for Gadarwara Super Thermal Power Project, Stage-I (2x660 MW) Page No.: ESE-1 of 14

MANTEC CONSULTANTS (P) LTD., NEW DELHI 9.0 EXECUTIVE SUMMARY

EXECUTIVE SUMMARY 1.0 INTRODUCTION

NTPC Ltd. the largest power company in India has installed capacity 37,014 MW. It has been awarded the MAHARATNA status on May, 2010 by Government of India. NTPC Ltd. has signed a Memorandum of Understanding (MOU) with the Government of Madhya Pradesh and M.P. Power Trading Company Ltd. on 09-11-2009 for setting up of Gadarwara Super Thermal Power Project of the capacity of 2640 MW (4×660 MW) in the district of Narsinghpur in Madhya Pradesh. The project is proposed to be implemented in two stages of 2x660 MW each. The proposed power project shall be a regional power project for benefits to Madhya Pradesh and other willing States/UTs in Western Region. Keeping in view the availability of suitable and adequate land, distance from reliable source of water, road and railway access, availability of infrastructural facilities and other environmental aspects, the proposed project site near Gangai and Umraiya villages has been finalized.

1.1 NEED OF THE PROJECT

Demand & Supply Scenario at the end of 12th Plan based on Demand projections in 17th EPS considering capacity addition of 86500 MW is presented in Table-1.1 below.

TABLE-1.1: DEMAND & SUPPLY SCENARIO AT THE END OF 12TH PLAN*

Peak (MW) Energy (MU) Region Availability Load/

Demand Deficit/ Surplus

Availability Load/ Demand

Deficit/ Surplus

(%) All India 195821 218209 -10.3% 1365379 1392066 - 1.9

From the above, it can be seen that there is an overall peak deficit of 10.3% and energy deficit of 1.9% exist in the country at the end of 12th Plan. Further, there is a likelihood of shortfall from the projected capacity addition in the 12th plan period and as a result the energy deficit is likely to increase. Considering the demand/supply scenarios at the end of 12th Plan Period as mentioned above, and also the likelihood of shortfall in the projected capacity addition in the 12th Plan, Gadarwara Super Thermal Power Project (2x660 MW), planned to be commissioned during 12th Plan period, is justified from demand supply consideration.

1.1.1 Location The proposed site is located in Gangai, Umaraiya Mehrakheda, Chorbarheta, Dongergaon, Kudari villages in Gardarwara Tehsil in Narsinghpur district,

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Executive Summary of Draft Environmental Impact Assessment

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MANTEC CONSULTANTS (P) LTD., NEW DELHI 9.0 EXECUTIVE SUMMARY

Madhya Pradesh. The site is located at a distance of about 115 km from Jabalpur towards Hoshangabad in south west and about 9 kms from Gadarwara town. Nearest railway head is Gadarwara (Approx.09 km away from the site). The state highway no. 22 at Gadarwara is at a distance of approximately 10 kms. State Highway No. 22 meets National Highway no. 26 at Kareli at a distance of approximately 25 kms from the site. The approx. distance from nearest commercial airports to site are 155 kms from Jabalpur and 240 kms from Bhopal. The site is having latitude and longitude of about 22o 51’11’’ N to 22o 52’49’’ N and 78o50’33” E to 78o 53’20” E, respectively. The Vicinity Plan of Gadarwara STPP, Stage-I(2x660 MW) is placed as Figure-1.1.

1.2 LAND About 1805 acres of land is identified for the project. The land is not prone to flood. There are about 25 homesteads oustees and 750 land oustees involved in the site. The land proposed to be acquired is a mix of government land, private agriculture land and grassland. No forest land is proposed to be acquired for the project. In-principle availability of 2500 acres of land has been received from Government of Madhya Pradesh vide letter dated 19.05.08.

1.3 WATER SOURCE, REQUIREMENT AND COMMITMENT The total water requirement for the Stage-I project, is estimated to be 3865 cum/hr with ash water recirculation. Govt. of Madhya Pradesh vide letter dated 19.05.08 have accorded water commitment for the project of 125 cusecs of water from Narmada river.

1.4 FUEL AVAILABILITY & REQUIREMENT SECL is considered as coal source. However the exact coal source will be decided after firm coal linkage. The long term coal linkage for the project has been applied on 06/10/09. Coal will be transported through Indian Railway Systems. Coal quality parameters having proximate analysis (as received basis) shall be having 33-45% of ash content, 11-15% moisture and 0.5% maximum Sulphur content. The coal requirement for 1320 MW project is estimated to be 7.10 million tonne/annum by considering average GCV of 3300 kcal/kg and 90%PLF.

1.5 POWER EVACUATION SYSTEM Considering the ultimate capacity of the project as 2640 MW (Stage-I 2x660MW and Stage-I 2x660MW), 11 KV line from the source to the sub station has been proposed as the step-up for the project. Based on the beneficiaries states/regions finalized for the project, the issue of power evacuation of the plant shall be taken up with CEA/ /appropriate Authorities.

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Executive Summary of Draft Environmental Impact Assessment

for Gadarwara Super Thermal Power Project, Stage-I (2x660 MW) Page No.: ESE-3 of 14

MANTEC CONSULTANTS (P) LTD., NEW DELHI 9.0 EXECUTIVE SUMMARY

1.6 ENVIRONMENTAL IMPACT ASSESSMENT (EIA) In order to identify the environmental impacts due to the construction and operation of the project and its associated facilities, and draw a suitable environmental management plan to mitigate adverse impacts, if any, a draft Environmental Impact Assessment (EIA) report for the project has been prepared as per the TOR approved by MoEF, dated 13th January,2011 in accordance with the procedure laid down in the EIA Notification of 14th September, 2006. NTPC have retained M/s Mantec Consultants Pvt. Ltd., New Delhi to carry out Environmental Impact Assessment (EIA) Study for the project. The assessment covers the baseline data generation, predictions and evaluation of impact on various environmental components and formulation of Environmental Management Plan and Disaster Management Plan.

1.7 BASELINE ENVIRONMENTAL SCENARIO

The baseline environmental status for various environmental attributes within 10 km radius of study area has been established through field monitoring supported by data from secondary sources. The environmental disciplines studied include land-use, demography and socio-economics, geology and soils, hydrology and water use, water quality, meteorology, air quality, terrestrial and aquatic ecology and noise.

1.7.1 Land Use

The land use pattern of the study area has been established on the basis of census data of 2001 and satellite imagery of 2010. As per satellite imagery (2010), agricultural land is the major constituent of the study area covering 50.29% of the study area. The built up land comprising residential settlements 8.68% of the study area, waste lands (marshy lands on canal side) cover 2.73% and water bodies cover 7.43% of the study area. Forest area is 30.87.

As per land use classification based on census data 2001, the agricultral land (irrigated and unirrigated) comprised of 49.66% of the total land in 2001. The percentage of cultivated Wasteland and Area not for cultivation was 2.60% and 8.92% respectively. Forest area was only 31.56% of study area. The project site is mostly agricultural land and grass land, partly Govt. land No important archaeological, historical, cultural, aesthetic, religious and ecologically sensitive areas exist within a radius of 10 km from the project.

1.7.2 Demography and Socio Economics Demographic and socio-economic profile of the study area is based on Census data for the year 2001. The total population of study area is 131356. The percentages of male, female population and sex ratio are 52.18%, 47.82% and 1000/916 respectively. The Schedule Caste (SC) population within the study area is 21734 which is 16.54% of the total population. The Schedule Tribe (S.T) population in the study area is 14.07%.

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MANTEC CONSULTANTS (P) LTD., NEW DELHI 9.0 EXECUTIVE SUMMARY

The total number of literates within the study area is 75330, which is 57.34% of total population. The percentage of male and female literacy to the total literate population is 59.65% and 40.35%, respectively. Total number of workers in the study area are 56755 (43.20%) of total population. Total number of main workers in the study area is 44718 (78.79% of workers).

Total number of marginal workers in study area is 12037, which is approximately 21.21% of the total worker population. The percentages of male and female marginal workers are 32% and 68% respectively. The study area as a whole possesses medium level of infrastructural facilities like education, health, drinking water, electrification, transport and communication.

1.7.3 Geology and Soil The proposed site is located near Gangai and Umaraiya villages. It is located in the Gadarwara Tehsil of Narsinghpur district in the state of Madhya Pradesh. Physiographically, the district area can be broadly divided into three sectors- namely 1) Narmada Valley alluvial plain, 2) Satpura range in the south and 3) the Vindhyan range in the north. The vast alluvial plain of Narmada valley stretches from east to west throughout the district on the both side of the Narmada River. The regional slope of the area is westward. The area Northwest, East and Southeast of Narsinghpur district is generally covered with black soils derived from Traps rocks varying in the depth from 0.33m to over a meter. They are usually clayey to loamy in texture with calcareous concretions invariably present. They are sticky and in summer, due to shrinkage, develop deep cracks. They generally predominate in montmorillonite and beidellite type of clays. In rest of alluvial areas, mixed clays , black to brown to reddish brown , derived from sandstones and traps is observed which is sandy clay in nature with calcareous concretions .Near the banks of the rivers and at the confluence, light yellow to yellowish brown soils are noticed which were deposited during the recent past. These soils are clayey to silt in nature. The soils near the foots hills are gravelly with good porosity.

1.7.4 Drainage

The main drainage of the study area shall be nearby natural watercourse. 1.7.5 Hydrology

Groundwater is the principal source of irrigation in the district and all the alluvial deposits of Narmada valley in the district form very potential aquifer.

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MANTEC CONSULTANTS (P) LTD., NEW DELHI 9.0 EXECUTIVE SUMMARY

The Archaean schists and phyllites form phreatic aquifers wherever weathered /jointed. The yield of these dug wells range from 1 to 2 lps. The dolomitic limestones have a high potential and the aquifer formed by solution cavities and fractures /joints sustain a good yield of the order of 7 lps, wherever solution cavities are encountered directly and a moderate potential if the structure is located in jointed fractured rock. The yield of these structures range from 3 to 5 lps. The fractured Vindhyan sandstones shales occurring in the northern part of the district form poor phreatic aquifers and dug wells taping these formations sustain only 2 to 3 hours of pumping daily. The vindhyans encountered in some bore holes at depth ranging between 50 to 80 m bgl do not form aquifers as such but their upper contact with overlying rocks yield 2 to 3 lps water. The phreatic aquifers of Gondwana formations, occupying the southern part of the district are formed by weathered zone of shales and fine to medium grained vindhyan sanstones and Gondwana formations have moderate potential. The yield of these dug wells range from 2 to 3 lps. Gondwana formations occurring at depth below alluvium form confined to semi-confined aquifers which are not very productive and yield less than 5 lps water. The Lametas, occurring only in North Western part of the district are weathered on surface and dug wells in the weathered portion yield a poor discharge ranging from 1to 2 lps. Deccan traps in the Northern part of the district overlie the Lametas and occur at the hill tops where no ground water structure exists. However in the South Eastern part of district, Deccan traps form moderate to good phreatic aquifers and dug wells sustain a good discharge ranging from 2 to 5 lps.

The alluvial aquifer system is most extensive one in the district. Two to three and places more number of granular zones are encountered in the alluvium ,comprising fine to medium to coarse grained sand ,gravel and kankar separated by clay lenses .The top phreatic aquifers in general ranges in thickness from 2 to 10 m and its top is encountered at a depth range of 5 to 20 bgl. The yield of dug wells tapping the phreatic aquifer ranges from 7.5 to 12 lps.

1.7.6 Water Quality Surface and ground water quality within the study area was established through monthly monitoring of physico-chemical and bacteriological characteristics of water sources at six locations. The monitoring location was selected on the basis of the relevance of water body (source of water or receptor of effluents) as well as the environmental significance. The monitoring locations Chitarewa river, Shakkar river and confluence of

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MANTEC CONSULTANTS (P) LTD., NEW DELHI 9.0 EXECUTIVE SUMMARY

Chitarewa and Shakkar river and three ground water samples near Chhenakachar village, Ghurpur village and ash disposal area. Although the physio-chemical characteristics of Chitarewa and Shakkar river are very good and the physico-chemical characteristics of ground water samples, including heavy metal content are conforming to drinking water standards prescribed in IS: 10500 (Test Characteristics for Drinking Water). But there is significant bacteriological contamination.

1.7.7 Meteorology

The climate at site has been characterized by meteorological data for the period 1951-1980 recorded by India Meteorological Department at Narsinghpur which is at a distance of 25 km from the proposed site and site meteorological data recorded by a surface meteorological observatory at site. The region experiences four distinct seasons: Winter, Pre-monsoon (summer), South West Monsoon and Post Monsoon. At IMD station at Narsinghpur, the observed mean daily minimum and maximum temperature were 8.2ºC and 42.5ºC where the minimum temperature was observed in the month of January and the maximum in the month of May. The average relative humidity varies from 39% to 90% at 08:30 hrs and 24% to 80% at 17:30 hrs. Analysis of hourly wind speed shows that the winds are generally light to moderate in this area. The monthly mean wind speed varies from 2.0 to 8.0 Km/hr. The windrose for the site indicates NNE is the most predominant during winter season, SW during the period of March to May and NE during the period of June to August with monthly wind speed varying in the range of 1.1 to 8.4 Km/h.

1.7.8 Ambient Air Quality

Ambient air quality was monitored at four locations around the project, for total suspended particulate matters (TSPM), particulate matter 10 (PM10), particulate matter 2.5 (PM2.5), Sulphur Di-oxide (SO2) and oxides of nitrogen (NOx), Ozone (O3), Mercury (Hg) from December, 2010 to May, 2011 (Winter season and Pre-monsoon season). The monitoring locations are selected in consideration of the prevailing wind pattern, type of location, accessibility and availability of continuous power supply. The monitoring results indicate that the air quality is well within the Ambient Air Quality Standards.

Ambient Air Quality Characteristics of the Study Area Ambient Air Quality data at Gadarwara

(All values in µg/m3) Parameters

Winter (Dec.,2010 - Feb., 2011)

Summer (Mar.,2011 - May., 2011)

PM10 60-84 62-86 PM2.5 34-47 35-46

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MANTEC CONSULTANTS (P) LTD., NEW DELHI 9.0 EXECUTIVE SUMMARY

TSPM 135-166 140-179 SO2 9-13 6-14 NOX 12-19 9-24 O3 21.0-22.4 -- Hg BDL --

1.7.9 Terrestrial Ecology

Most of the land has grassland characteristic followed by crop land. Tree species observed in the area are planted by the local inhabitants in their field and nearby village. Along the banks of streams dry forest type vegetation was found in which 95% of the trees are Prosopis juliflora. Among most common trees found in the area are Delbergia sp, Albezia sp, Eucalyptus sp, Azadirachta indica, Terminalia sp etc. Various species of shrubs and herbs have also been recorded around the study area.

There is no wildlife sanctuary or national park within a radius of 10 kms of the project site and no endangered species of flora and fauna have been observed in the study area. While a protected forest is situated towards south direction at a distance of approx. 07 km from project.

1.7.10 Aquatic Ecology

Baseline studies for assessment of aquatic ecology were carried out at three locations. Water sample was collected and examined for phytoplanktons and zooplanktons. For fish species different gears were applied such as cast net, hook and line method, scoop net etc.

Among phytoplanktons, blue green algae, green algae and diatoms were found commonly. Protozoans, rotifers, copepods and cladoceran were present among zooplkanktons. Total 33 fish species were recorded in the waters of Chitarewa river and confluence point of Chitarewa and Shakkar river, out of which one species Tor tor (Mahasheer) is migratory in nature and fall under endangered category of Indian Wildlife Act and that need to be protected. Beside the species of Tot-Tor and Amphiphous cuchla, no endangered species of fauna has been observed in the study area as per Red data book of Botanical Survey of India and Wild Life (Protection) Act 1972.

1.7.11 Noise A noise survey was undertaken during the month of January, 2011 in the study area to assess the background noise levels in different zones viz., Residential, Industrial, Commercial and Silence zones. Ten (10) locations spread over an area of 10 kms radius from the project site were selected for noise level measurement. The noise level varied between 41.3 to 66.4 dB (A) during daytime and 37.1 to 58.5 dB(A) during night time.

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1.8 IMPACT ASSESSMENT AND MITIGATION MEASURES 1.8.1 Land Use

As Gadarwara STPP is Greenfield project, the entire land for the project will have to be acquired. Land acquisition will result into loss of land for the affected families. The construction activities attract a sizeable influx of population which is likely to be associated with construction of temporary hutment for construction work force. However, this will be only a temporary change and shall be restricted to construction period. As soon as the construction phase is over, the land use pattern modified to meet the requirement of construction phase shall be reversed.

Development activity also induces changes in land use pattern of the adjoining areas because of the increased availability of infrastructural facilities, increase in commercial activities.

1.8.2 Hydrology

Surface water (Narmada river) will be used as water source for the project. As most of the water requirement of the study area is fulfilled by the ground water and small water aquifers therefore, it is anticipated that there will be no significant impact on the hydrology and water use of the area.

1.8.3 Demography and Socio Economics The impacts on demography and socio-economic status of the area due to construction and operation of the project, will be positive as well as negative in nature. These impacts may be broadly classified into two groups: • Direct impact due to acquisition of land • Indirect impacts due to

o immigration of work force o change in socio-economic scenario of the area and o Increased stress on public utilities and resources of the area.

1.8.4 Air Quality

Prediction of short term impacts on air quality due to stack emissions has been carried out using Industrial Source Complex [ISCST3] 1993 simulation model, developed by United States Environmental Protection Agency [USEPA]. The model simulations deal with three major pollutants viz., Sulphur Dioxide (SO2), Oxides of Nitrogen (NOx) and Particulate Matter (SPM) emitted from the stack.

The maximum predicted incremental ground level concentrations (GLCs) for SO2, NOx and SPM, due to operation of Stage-I of the project shall be 21.8, 8.1 and 1.3 µg/m3 respectively during Winter season and 25.9, 9.6 and 1.6 µg/m3 respectively during Pre-monsoon season. These values were observed at a distance of about 5 km in the NEE direction during winter season and 5 km in the NE direction during pre-monsoon season respectively. The maximum GLCs for SO2, NOx and PM10 after implementation of the project, are estimated to be within the ambient air quality standards for mixed use areas.

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MANTEC CONSULTANTS (P) LTD., NEW DELHI 9.0 EXECUTIVE SUMMARY

RESULTANT MAXIMUM GROUND LEVEL CONCENTRATION AFTER IMPLEMENTATION OF GADARWARA STPP, STAGE-I (2X660MW)

Pollutant Maximum AAQ

Concentrations Recorded During the

Study (μg/m3)

Incremental Concentration

(μg/m3)

Resultant Concentration

(μg/m3)

National Ambient Air

Quality Standards

(μg/m3) Winter Season (2010-11) SO2 13 21.8 34.8 80 NOx 19 8.1 27.1 80 PM10 84 1.3 85.3 100 Pre-monsoon Season (2011) SO2 14 25.9 39.9 80 NOx 24 9.6 33.6 80 PM10 86 1.6 87.6 100

Various measures proposed to be adopted to minimize the pollution from the project are as follows: 1. High efficiency ESPs to limit SPM emission 100 mg/Nm3. 2. A tall bi-flue stack of 275m height for wider dispersal of pollutants,

resulting in lower ground level concentrations. 3. Space provision for retrofitting Flue Gas Desulphurisation (FGD) system, if

required in future. 4. Installation of dust suppression and extraction system at coal handling

plant area to control fugitive dust. 5. Plantation and afforestation in the available spaces. 6. Water spraying at all dust generation areas viz., the coal and ash handling

areas. 1.8.5 Soil

Constructional activities like leveling, excavation and removal of existing vegetation would invariably disturb the soil of the area. The impacts on soil during construction phase shall be mainly due to loss of topsoil in the construction areas and contamination of the soils of surrounding area due to construction materials such as cement, sand, oils, etc. The disturbances would be more pronounced during the summer and monsoon seasons with strong rains. However, it shall be temporary and shall be confined to the areas of construction only. Removed top soil may be utilized for landscaping and land improvement in other areas, which are not under construction.

1.8.6 Water Quality During the construction phase site preparation (leveling, excavations etc.) and

erection of structures will have temporary effect on the water quality of receiving water body. Flow of loose materials (soil and construction material) into the drain, especially during monsoons will result in higher turbidity and suspended solids content. Adequate arrangement would be made to ensure proper drainage and disposal of the wastewater; so that water does not

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stagnate in the form of cess pools. The wash off will be directed to a sedimentation basin before discharge. Hence no significant increase in the suspended solid content of the water regime is expected.

High Concentration Slurry Disposal (HCSD) system for fly ash system and ash water recirculation system for the bottom ash shall reduce the quantity of effluent. Effluents from various sources after appropriate treatments will be led to Central Monitoring Basin (CMB) where regular check of its quality will be carried out. Final effluent if any, will be discharge from CMB confirming prescribed regulatory standards. The pH of the ash water is either neutral or alkaline (7 or above) and hence the leaching of heavy metals is highly negligible, therefore contamination of ground water is unlikely. In the bottom ash pond area also, a 30 cm thick layer of HCSD shall be provided, which shall act as an impermeable layer.

1.8.7 Noise

The major sources of noise during the construction phase are vehicular traffic and construction equipment, which generate noise ranging between 75-90 dB(A). The predicted noise level due to operation of such equipment at a distance of 500m from the source is 39.5 dB(A) The ambient noise level recorded during field studied in the near by area located at a distance of 500m from the site ranges between 32.5-56.2 dB(A). As the ambient noise levels are higher than the predicted noise levels, due to masking effect, no increase in the ambient noise levels during construction phase is envisaged. Thus, there would not be any adverse impact due to construction and operation of the plant on the residents in the nearby villages. However, workers within the construction area and plant area, may be affected due to high noise levels. Adequate protective measures in the form of ear-muffs / ear plugs/ masks shall be provided to such persons, which will minimize / eliminate such adverse impacts. Provision of green belt and afforestation will help in reducing the noise levels.

1.8.8 Terrestrial Ecology Deposition of fugitive dust on pubescent leaves of nearby vegetation may lead to temporary reduction of photosynthesis. Such impacts would, however, be confined mostly to the initial periods of the construction phase and would be minimized through water sprinkling.

Deposition of fly ash may interrupt gaseous exchange through leaves, thereby affecting plant growth However, the impact of the project is envisaged to be negligible, as incremental ground level concentration of SPM due to emissions from the project is predicted to be 1.6 µg/m3 only. The predicted maximum incremental ground level concentration of SO2 due to operation of the project is 25.9 µg/m3 resulting in maximum ground level concentrations of SO2 as 29.9 µg/m3. This is well within the Indian Standards for Ambient Air

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Quality. Since most of the tree species occurring in the area are deciduous, they have high Air Pollution Tolerance Index (APTI), and therefore impact of SO2 will not be significant.

1.8.9 Aquatic Ecology The runoff from construction area may lead to a short-term increase in suspended solids and decrease in dissolved oxygen near the discharge point in receiving water body. This may lead to a temporary decrease in the photosynthetic activity of phytoplanktons, rise in anaerobic conditions, habitat destruction and food chain modification. However, for major part of the year during construction phase, no detectable impact is expected because water quality will not change significantly. The project will draw water from Narmada river. The water system of the project has been designed with maximum recycle/ reuse of water, and a very small quantity shall be drawn as a make-up to the system. Therefore, there is no likelihood of entrapment or impingement of phytoplankton/ zooplankton in the water intake system. Further, as the project will have a close cycle cooling system with cooling towers and clarified water as make-up to the cooling system, there will be no thermal impact on aquatic ecosystem due to operation of the project. A small quantity of treated effluents conforming to the regulatory standards shall only be discharged into natural water course. It has been concluded that there will be no significant impact on the water quality due to discharge of effluents. It may, therefore, be concluded that there would be no impact on aquatic life of the river.

1.9 ADDITIONAL STUDIES

The risk analysis for fuel storages such as LDO & HFO have been carried out. The possibility of any risks due to fire will be confined to the plant premises only. There will not be any community risks. A Disaster Management Plan (DMP) for project has been prepared under EIA Study. However, DMP has already been implemented at NTPC for various existing units, specifying responsibilities at various levels to be discharged in case of an emergency. The DMP at site shall be strengthened suitably to include Stage-I units, based on recommendation of DMP included in EIA Report.

1.10 PROJECT BENEFITS

The project will improve the power supply position in Madhya Pradesh, which is vital for economic growth as well as improving the quality of life. The improved power supply will reduce the dependence of general public and commercial establishments on DG Sets thereby reducing the noise pollution as well as air pollution at local levels. The project shall provide employment potential under unskilled, semi-skilled and skilled categories. The employment potential shall increase with the start

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of construction activities, reach a peak during construction phase and then reduce with completion of construction activities. During operation phase also there will be employment opportunities, mainly in service sector, although its magnitude will be much less.

1.11 ENVIROMENTAL MONITORING Monitoring of environmental parameters is an integral part of environmental

management. The monitoring plan for the project has been drawn to assess the changes in environmental conditions, if any, during operation of these units and to monitor the effective implementation of mitigatory measures envisaged.

1.12 ENVIRONMENTAL COST:

It is proposed to invest about Rs 764.76 Crores on pollution control, treatment, monitoring systems and R&R activities.

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Figure-1.1-The Vicinity Plan of Gadarwara STPP (2x660 MW)

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Photograph of Project Site of Gadarwara STPP Stage-I (2x660 MW) Near Villages Umariya and Gangai