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Environmental Impact Assessment Study Report
For Proposed Expansion 2x660 MW
Obra Coal Fired Thermal Power Project District : Sonebhadra (U.P.)
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL
Pollution Control Research Institute, BHEL Haridwar 1
INDEX
S.NO. INTRODUCTION PAGE NO. 1.0 Introduction 1 1.1 Purpose of the Report 1 1.2 Identification of Project & Project Proponent 3
1.2.1 Identification of Project 3 1.2.2 Project Proponent 3 1.3 Scope of Environment Impact Assessment Study 4 1.4 TOR Compliance 6 1.5 Compliance status of clarifications sought by the EAC in
the 60th meeting 10
1.6 Environmental Impact Assessment Report 11
2.0 PROJECT DESCRIPTION 13 2.1 Type of Project 13 2.2 Need of the Proposed Project 13
2.2.1 Location and Accessibility 16 2.2.2 Existing Plant 18 2.2.3 Size or Magnitude of Operation including Resources 20 2.3 Layout Plan/Land Requirement 21 2.4 Coal Requirement , Availability and Linkage 25 2.5 Technical Details of Proposed Expansion 26
2.5.1 Steam Generator and Auxiliaries 26 2.5.2 Turbine and its Auxiliaries 28 2.5.3 Steam Generator Circulation System (For Once Through
Boiler) 29
2.6 Air and Flue Gas System 29 2.6.1 Fuel Oil Burning System 30 2.6.2 Coal Burning System 30 2.6.3 Soot Blowing System 30 2.7 Cooling Tower 31 2.8 Fuel Transportation and Handing System 32
2.10 Power Requirement 35 2.11 Make Up Water Requirement & Treatment 35
2.11.1 Water Treatment Systems 37 2.11.2 Water Pre-Treatment Plant 37 2.11.3 De-Mineralization Plant 37 2.11.4 Chlorination Plant 38 2.11.5 Condensate Polishing Plant 38 2.11.6 CW Treatment System 39 2.11.7 Ash Water Re-circulation System 39 2.12 Pollution Generation and Management 39
2.12.1 Air Emission and Management 39
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL
Pollution Control Research Institute, BHEL Haridwar 2
2.12.2 Waste Water Management 41 2.12.3 Proposed Expansion 41 2.12.4 Effluent from Process 42 2.12.5 Effluent from Domestic Activities 43 2.12.6 Existing Plant 44 2.12.7 Blow down from boilers, rejects from DM plant and others;
and Overflow from ash dyke. 45
2.13 Ash Generation and Handling System 46 2.13.1 Bottom Ash Handling System 47 2.13.2 Fly Ash Handling System 48 2.13.3 Ash Slurry Disposal system 48 2.13.4 Ash Water System 48 2.13.5 Ash Dyke/Pond 49 2.13.6 Existing Plant 49 2.14 Fire Detection and Protection System 50 2.15 Project Cost 52
3.0 BASELINE STUDY 53 3.1 Introduction 53 3.2 Baseline Study 54 3.3 Air Environment 54
3.3.1 Selection of Sampling Locations 55 3.3.2 Description of Ambient Air Monitoring Stations 56 3.3.3 Methodology for Sampling and Analysis 58 3.3.4 Results of Ambient Air Quality Monitoring 61
3.3.4.1 Air Quality 64 3.3.5 Micro-Meteorology 66 3.3.6 Climate 67 3.3.7 Wind Speed and Wind Direction 67 3.3.8 Air Quality Impact Assessment by means of Modeling
(ISCST3 Model) 70
3.3.9 Input Data and Model Application 75 3.3.10 Emission Inventory 76 3.3.11 Model Application 77 3.3.12 Assessment of Impact on Ambient Air Quality 81 3.3.13 Noise Environment 82 3.4.0 Water Environment 84 3.4.1 Drainage and Hydrology 84 3.4.2 Ground Water Assessment 85 3.4.3 Surface Water quality 94 3.4.4 Standards for Surface Water 95 3.5.0 Land Environment 96 3.5.1 Land Use 96 3.5.2 Seismic consideration 99 3.5.3 Soil Quality 99 3.6 Biological Environment 105
3.6.1 Introduction 105
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL
Pollution Control Research Institute, BHEL Haridwar 3
3.6.2 Baseline Status 106 3.6.3 Methodology for Biological Environment 107 3.6.4 Terrestrial Ecology 108 3.6.5 Aquatic Ecology 108 3.6.6 Terrestrial Environment 109 3.6.7 Rare and Endangered Species 125 3.6.8 Fisheries and Aquatic Life 125 3.6.9 Aquatic Environment 126
3.6.10 Ecological Sensitive Areas 129 3.6.11 Kaimur Wildlife Sanctuary 129
3.7 R & R Plan 133 3.8 Socio-Economic Environment 133
4.0 ANTICIPATED ENVIRONMENT IMPACTS AND
MITGATION MEASURES 139
4.1 Impacts during Construction Phase 139 4.1.1 Land of OTPS 140 4.1.2 Site Development 140 4.1.3 Civil Construction Work 140 4.1.4 Construction Materials 141 4.1.5 Mechanical & Electrical Erection 141 4.1.6 Immigration 141 4.1.7 Staff Quarters and Other Requirements 141 4.1.8 Sanitation, Rest Room Facilities to Labour Force 142 4.1.9 Water Resources 143
4.1.10 Air Quality 144 4.1.11 Noise Level 145 4.1.12 Water Quality 146 4.1.13 Soil Quality 148 4.1.14 Components Creating Impacts to Socio-Economic
Environment 150
4.2 Environmental Impact Matrix-Construction Phase 152 4.3 Environmental Control Measures during Construction
5.0 ANALYSIS OF ALTERNATIVE SITES & TECHNOLOGY 177 5.1 Introduction 177 5.2 With no expansion of project 178 5.3 Establishment of proposed Expansion at New Site 179 5.4 Establishment of proposed Expansion at same Site 179
5.4.1 Location 179 5.4.2 Raw Material 180 5.4.3 Configuration and Process Technology 180 5.4.4 Advantage of Supercritical Technology 181
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL
Pollution Control Research Institute, BHEL Haridwar 4
6.0 ENVIRONMENT MONITORING PROGRAMME 185 6.1 Introduction 185 6.2 Objective of Monitoring 185 6.3 Monitoring schedule during construction phase 185
6.3.1 Monitoring schedule during operational phase 187 6.4 Noise 192 6.5 Reporting Schedules of the Monitoring Data 193 6.6 Staff Requirement 194 6.7 Cost of Environment Monitoring 194 6.8 Occupational Safety and Health 194
6.8.1 Occupational Safety 195 6.8.2 Health 197 6.8.3 Fire Protection System 198 6.9 Hospital 199
7.1.1 Approach to the Study 203 7.2 Compliance status of Instructions Issued in 60th meeting of
Expert Appraisal Committee dated 05.11.2012 222
7.2.1 Application for clearance approval from standing committee of the National Board of Wild Life.
222
7.2.2 Cumulative Impact Assessment 223 7.2.3 Implementation of Singrauli Action plan 234 7.3 Green Belt Development 239 7.4 Status of Coal Block 245 7.5 Ash Dyke Breach 245 7.6 Topographical Survey 246 7.7 Area drainage Study 246
8.0 DISASTER MANAGEMENT PLAN 247 8.1 List of Details to be Notified 262
9.0 PROJECT BENEFITS 264 9.1 Increased Power Supply 264 9.2 No Land Issue 267 9.3 Corporate Social Responsibility 267 9.4 Economic Growth 268
10.0 Environment Management Plan 269 10.1 Environment Management Cell 270 10.2 Training 271 10.3 Environmental Management during Construction Phase 272
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL
Pollution Control Research Institute, BHEL Haridwar 5
10.4 Environmental Management During Operation Phase 274 10.4.1 Management of Air Pollution 274 10.4.2 Fugitive Emissions 282 10.5 Management of Water Pollution 285
10.5.1 Water Treatment Systems 287 10.6 Management of Noise 292 10.7 Ash Management 293 10.8 Socio - Economic Environment 298 10.9 Rain Water Harvesting 299
10.10 Green Belt Development 301 10.11 CLEAN DEVELOPMENT MECHANISM (CDM) 305 10.12 ENVIRONMENTAL COST 305
11.0 PUBLIC CONSULTATION 306 11.1 Public Hearing Points raised during Public Hearing 308
12.0 SUMMARY & CONCLUSION 312-315
13.0 DISCLOSURE OF CONSULTANTS ENGAGED 316 13.1 Team Composition 316
ANNEXURES
1 TOR 318-321 2 Change in unit Configuration 322-323 3 Water allocation 324 4 Coal Linkage 325-326 5 Minutes of Meeting 327-330 6 MoEF Letter 331-332 7 Water Balance Diagram 333 8 Ash Utilisation plan 334 9 Jaypee Agreement Letter 335-340
10 Wild life NOC Letter 341 10-A Letter to Principal Conservative Forest Department 342-345 11 Green belt development letter 346-359 12 Green belt development approval letter from CMD 360 13 Plot Plan 361 14 Jaypee expression of Interest letter for Ash Utilisation 362 15 Vicinity cum Layout plan 363 16 Green Belt Development 364 17 Rain Water Harvesting Letter from Director Underground
Water Dept. Lko 365
18 Letter by CGM Obra to DFO, Mirzapur for National Board of Wild life
366-368
19 Public Hearing News Paper Cutting 369-370 20 Public Hearing Minutes of Meeting 371-379 21 Public Hearing Attendance Sheet 380-387
Chapter‐1
Introduction
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL
Pollution Control Research Institute, BHEL Haridwar 1
1.0 INTRODUCTION
Electricity is the essential form of energy not only in productive sectors like industry
and agriculture but it also very much needed in modern times for domestic and
commercial purposes and has become almost an essential ingredient in man's life.
Recognizing this fact and realizing no significant development of this sector in pre-
independence era, Power Sector development was conceived under Public Sector
under Electricity (Supply) Act, 1948.
Indian power sector is facing challenges and despite significant growth in generation
over the years, it has been suffering from shortages and supply constraints.
Uttar Pradesh is India’s most populous state with a population of over 201 million.
Promoting electricity is at the center of strategy for development of the state. Power
to all therefore is not only integral but the primary component of the development
program of the state. Uttar Pradesh has been severely constrained in its economic
development and quality of life by the appalling power situation in the state. Villages
get only 14 hours of power supply and even then the quality is poor. The situation is
similar even in small towns. Barely 1/5th of the rural households in the state have
access to this basic need.
1.1 Purpose of the Project
For industrial and agricultural development, availability of adequate power at an
economic rate is the prime prerequisite. In order to fulfill the task of meeting the
power demand of the State during the coming years, it is necessary to plan in such a
manner that the installed capacity exceeds the anticipated load demand as well as
some spinning reserve capacity is available to attend the statutory periodic overhauls
and emergency outages. Industry, trade, agriculture, employment etc. all depend on
proper supply of power. This is the guiding factor for economic condition of any state
and its people.
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL
Pollution Control Research Institute, BHEL Haridwar 2
Uttar Pradesh Rajya Vidyut Utpadan Nigam Ltd. (UPRVUNL) proposes an
expansion of the existing Thermal Power Plant in the village Obra of district
Sonebhadra, Uttar Pradesh by putting up a supercritical unit of 2x660 MW, Obra ‘C‘.
The expansion is proposed within existing premises and no additional land is
proposed to be acquired. At Obra first unit was commissioned in 1967 and last unit
was commissioned in 1982. Due to new innovation in power generation technology
and implementation of stringent environment laws/standards, operation of units in
existing plant became economically unviable and eco-unfriendly. Hence,
management of UPRVUNL has decided to scrap some of the units and to operate
rest of the units after renovation and maintenance.
Power to all is not only integral part but the primary component of the development
program of the state. Uttar Pradesh has been severely constrained in its economic
development and quality of life by the appalling power situation in the State. The
proposed project will help UPRVUNL to meet growing demand of power in Uttar
Pradesh. This project will also help in bridging demand supply gap in the State.
The proposed 2x660 MW ‘Obra C’ Power Plant is envisaged to start generating
power during the 13th Plan period (2017-2022). The entire generation from this unit
shall be utilized to meet the power requirement of State of Uttar Pradesh and the
surplus power, if any, shall be fed into Northern Grid to meet the power requirement
of other states in Northern Region.
Demand & Supply Scenario at the end of 12th Plan with the addition of 86500 MW
and enhanced performance has been worked out. It is evident that there is overall
peak deficit of 6.16% and 6.92% exist in the country after 11th & 12th plans
respectively. The National Electricity Policy has set up the goal of adding new
generation capacity to not only eliminate energy and peaking shortages but to have a
spinning reserve of 5% in the system. Considering the above, proposed expansion
as Obra ‘C’ (2X660 MW), planned to be commissioned in the early 13th plan, is
therefore, justified from demand supply consideration as discussed in Chapter 2 of
this report.
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL
Pollution Control Research Institute, BHEL Haridwar 3
The proposed extension of 2x660 MW ‘Obra C’ Units at Obra TPS will help
UPRVUNL to meet growing demand of power in U.P. This project will also help in
bridging demand supply gap in the State.
For the proposed extension of 2x660 MW ‘Obra C’, Environmental Impact
Assessment (EIA) shall be carried out as per new Environmental Impact Assessment
Notification dated 14th September 2006, establishment of new coal based Thermal
Power Plant above 500 MW and requires Environmental Clearance (EC) from MoEF
as CATEGORY ‘Á’ project.
1.2. Identification of Project & Project Proponent 1.2.1 Identification of Project
The proposed extension of Obra TPS consisting of 2 x 660 MW ‘C’ units will be
located in the premises of existing Obra TPS of UPRVUNL in Sonebhadra district.
The nearest railway station is Chopan. The nearest major town is Robertsganj, which
is approximately 35 kms. The district Sonebhadra is bounded by the state of
Chhattisgarh to the South, Madhya Pradesh to the West and Bihar state to the East.
Latitude and Longitude of the site is 24027’N and 820 59’ E respectively. The altitude
of the site is approximately 195 meter above mean sea level (MSL). The proposed
site is around 125 Km from Varanasi and 13 Km from Chopan. The proposed site for
the extension units is mostly flat with a small part of hill which will require clearance
and labeling. Soil is classified as Alluvial soil.
The proposed expansion of 2x660 MW Obra TPS shall be accommodated in the
existing premises of Obra TPS and no additional Land shall be acquired for the
proposed plant.
1.2.2 Project Proponent
The project proponent is Uttar Pradesh Rajya Vidyut Utpadan Nigam Limited
(UPRVUNL).
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL
Pollution Control Research Institute, BHEL Haridwar 4
Uttar Pradesh Rajya Vidyut Utpadan Nigam Limited (UPRVUNL) was constituted in
1980 under the Companies Act 1956 for construction of new Thermal power projects
in the state of Uttar Pradesh (U.P.). Today it is looking after operations of five
Thermal Power Plants located in difference parts of U.P., with a total generation
Chapter 11 Public Consultation Present details of issues raised and
response of UPRVUNL during public
hearing.
Chapter 12 Summary &
Conclusion
Summary & Conclusion of the project.
Chapter 12 Disclosure of
Consultants
Engaged
Company’s Profile with resumes of team
members.
Chapter‐2
Project Description
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL.
13 Pollution Control Research Institute, BHEL, Haridwar
2.0 PROJECT DESCRIPTION
2.1 Type of Project
Uttar Pradesh Rajya Vidyut Utpadan Nigam Limited (a Government of UP undertaking)
intends to install 2X660 MW, coal based supercritical units as Obra C extension project in
the premises of the existing Obra Thermal Power Plant, in the district of Sonebhadra, in the
state of Uttar Pradesh. The Power Plant is envisaged to start generating power during the
13th Plan period (2017-2022). The entire generation from this unit shall be utilized to meet
the power requirement of State of Uttar Pradesh and the surplus power, if any, shall be fed
into Northern Grid to meet the power requirement of other states in Northern Region.
2.2 Need of the Proposed Project
Rapid industrialization and increase in commercial and domestic use of electricity are the
main reasons for increase in power consumption. In addition, Government policies like rural
electrification, electricity for all, development of irrigation sector, minimum per capita
consumption of electricity are also contributing in increasing the future power demand. To
meet the above requirements, the addition in the power generation capacity will have to
match with future power demand.
For industrial and agricultural development, availability of adequate power at an economic
rate is the prime prerequisite. In order to fulfill the task of meeting the power demand of the
State during the coming years, it is necessary to plan in such a manner that the installed
capacity exceeds the anticipated load demand as well as some spinning reserve capacity is
available to attend the statutory periodic overhauls and emergency outages. Industry, trade,
agriculture, employment etc. all depend on proper supply of power. This is the guiding
factor for economic condition of any state and its people.
Uttar Pradesh is India’s most populous state with a population of over 201 million.
Promoting opportunity is at the center of strategy for development of the state. Power to all
therefore is not only integral but the primary component of the development program of the
state. Uttar Pradesh has been severely constrained in its economic development and
quality of life by the appalling power situation in the State.
The proposed project will help UPRVUNL to meet growing demand of power in U.P. This
project will also help in bridging demand supply gap in the State.
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL.
14 Pollution Control Research Institute, BHEL, Haridwar
However, with the rapidly increasing industrial development and per capita energy
consumption level is an aspect of importance in the standards of living of both Urban and
rural areas, Agricultural growth will also increase the power demand in the state to a greater
extent.
Availability of power is one of the most major infrastructure requirements for industrial
development of a nation. Quality power at optimum cost is a catalyst for industrial
development. The State of Uttar Pradesh has ambitious plans for rapid industrialization.
Therefore power generation in the state of Uttar Pradesh requires urgent augmentation of
generation capacity. The proposed project is one of the projects planned to be developed
for long term capacity addition project. The proposed project will help in bridging the gap
between supply and demand of power in the State of U.P. and Northern region.
The demand scenario has been prepared as per latest publication of Electrical Power
Survey (EPS-17) published by Central Electricity Authority (CEA) and summarized as per
given in Table 2.1 below :
Table 2.1
Demand Projections upto 2012 & 2017 under 17th EPS
Region Peak Demand as per
17th EPS (MW)
Energy Requirement as per
17th EPS (MU)- Forecast
Upto 2012 Upto 2017 Upto 2012 Upto 2017
NR 48137 66583 294841 411513
WR 47108 64349 294860 409805
SR 40367 60433 253443 380068
ER 19088 28401 111802 168942
NER 2537 3760 13329 21143
Islands 88 136 384 595
All-India 157325 223662 968659 1392066
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL.
15 Pollution Control Research Institute, BHEL, Haridwar
Demand & Supply Scenario at the End of 11th Plan
Demand & Supply Scenario at the end of 11th plan with the addition of 78577 MW and
enhanced performance in 11th Plan has been worked out and presented below in Table 2.2
Table 2.2
Demand & Supply Scenario at the End of 11th Plan
Region Availability
at the end of
11th Plan
Peak
(MW)
Demand as
per EPS
17th
Forecast
Deficit/
Surplus
(%)
Energy
Requirement
as per 17th
EPS (MU)-
Forecast
Deficit/
Surplus
(%)
Energy (MU) Energy
(MU)
Peak (MW)
NR 282905 41103 294841 -4.05 48137 -14.61
WR 281691 40926 294860 -4.47 47108 -13.12
SR 250918 36456 253443 -1.0 40367 -9.69
ER 167490 24334 111802 49.81 19088 27.49
NER 32754 4759 13329 145.73 2537 87.57
Islands 388 56 384 1.03 88 -35.95
Total 1016146 147634 968659 4.9 157325 -6.16
From the above, it is evident that the peak deficit still exists at the end of 11th Plan to the
extent of 6.16% for whole country in totality. While for the northern region the energy deficit
is 4.05% and peak deficit is 14.61% at the end of the 11th Plan.
Demand & Supply Scenario at the End of 12th Plan
Demand & Supply Scenario at the end of 12th Plan with the addition of 86500 MW and
enhanced performance has been worked out and presented below in Table 2.3
Table 2.3
Demand & Scenario at the End of 12th Plan
Region Availability at the
end of 11th Plan
Demand as per EPS 17th Forecast
Energy
(MU)
Peak
(MW)
Energy
(MU)
Deficit/
surplus
(%)
Peak
(MW)
Deficit/
surplus
(%)
All India 1432903 208184.3 1392066 2.93 223662 -6.92
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL.
16 Pollution Control Research Institute, BHEL, Haridwar
From the above discussion, it is evident that there is overall peak deficit of 6.16% and
6.92% exist in the country after 11th & 12th plans respectively. The National Electricity Policy
has set up the goal of adding new generation capacity to not only eliminate energy and
peaking shortages but to have a spinning reserve of 5% in the system. Considering the
above, and likely peak deficit at the end of 11th plan for northern region as (-) 14.61%,
proposed expansion as Obra ‘C’ (2X660 MW), planned to be commissioned in the early 13th
plan, is therefore, justified from demand supply consideration.
2.2.1 Location and Accessibility
The proposed extension of Obra TPS consisting of 2 x 660 MW units will be located in the
premises of existing Obra TPS in Sonebhadra district. The nearest railway station is
Chopan. The nearest major town is Robertsganj, which is approximately 35 kms. The
district Sonebhadra is bounded by the state of Chhattisgarh to the South, Madhya Pradesh
to the West and Bihar state to the East.
Latitude and Longitude of the site is 24027’N and 820 59’ E respectively. The altitude of the
site is approximately 195 meter above mean sea level (MSL). The proposed site is around
125 Km from Varanasi and 13 Km from Chopan. The proposed site for the extension units
is mostly flat with a small part of hill which will require clearance and leveling. Soil is
classified as Alluvial soil.
The district map of Uttar Pradesh showing OTPS location is given below in Figure.2.1.
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL.
17 Pollution Control Research Institute, BHEL, Haridwar
Figure.2.1 District map of Uttar Pradesh showing location of Obra
The topographical map of 10 km radius of OTPS and location of proposed project site of
2x660 MW Obra ‘C’ TPS and area under 10km radius is shown in Figure.2.2.
Latitude: 24° 26’ N Longitude: 82° 58’ E
District: Sonebhadra
2.2
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Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL.
19 Pollution Control Research Institute, BHEL, Haridwar
installed during their R&M with the designed outlet dust concentration less than 100
mg/Nm3 in flue gases emitted through stacks. Details of units of Obra Thermal Power
Stations, deleted and under R&M are given in Table 2.4 below:
Table 2.4
Units of Obra Thermal Power Station, Existing, Deleted and under R&M.
Status of existing plant including renovation and maintenance work is as given below:
The de-rated capacity of existing units is: 2X50 + 2X94 + 5X200 = 1288 MW. In Units #
1 and 2 (capacity 50MW each), ESP of 150 mg/Nm3 concentration and efficiency
99.86% have been installed. Whereas, in Unit#9 (capacity 200MW), ESP of 100
mg/Nm3 concentration and efficiency 99.827% have been installed, and in remaining
Unit Year of
commiss
ioning
Capacity Status
Obra - ‘A’ Unit 1 1967 50 MW In operation after Renovation
Obra - ‘A’ Unit 2 1968 50 MW In operation after Renovation
Obra - ‘A’ Unit 3 1968 50 MW Deleted
Obra - ‘A’ Unit 4 1969 50 MW Deleted
Obra - ‘A’ Unit 5 1971 50 MW Deleted
Obra - ‘A’ Unit 6 1973 100 MW Deleted
Obra - ‘A’ Unit 7 1974 94 MW
(De-rated
Capacity)
Not in Operation due to R&M works
which is scheduled to be completed by
Nov-2015.
Obra - ‘A’ Unit 8 1975 94 MW Closed ; under process of deletion
Obra - ‘B’ Unit 9 1980 200 MW In operation after Renovation
Obra - ‘B’ Unit 10 1979 200 MW Not in Operation due to R&M works
which is scheduled to be completed by
December-2015
Obra - ‘B’ Unit 11 1977 200 MW Not in Operation due to R&M works
which is scheduled to be completed by
March-2016.
Obra - ‘B’ Unit 12 1981 200 MW In operation and shut down is due for
R&M works which is scheduled to be
completed by December-2017
Obra - ‘B’ Unit 13 1982 200 MW In operation and shut down is due for
R&M works which is scheduled to be
completed by December-2017
Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL.
20 Pollution Control Research Institute, BHEL, Haridwar
units # 10, 11, 12 and 13 (capacity 200MW each), similar ESP of 100 mg/Nm3
concentration and efficiency 99.827% shall be installed during R&M works.
Opacity meter in units 1, 2 & 9 have been installed. In remaining units, the opacity
meters will be installed during phase wise R&M for which orders have already been
placed with BHEL;
Dry Fly ash Extraction System in 2X50 MW exists, and is functional.
Dry Fly ash Extraction System has been installed in Unit # 9 (capacity 200MW), which is
functional after undergoing R&M. For other units # 10,11,12 and 13 also (each of
capacity 200MW) , DFAES shall be installed after their R&M.
Effluent Treatment Plant is commissioned on 17.09.2014 and construction of Ash Water
Recirculation System (AWRS) is under progress and expected to be completed by Nov,
2015.
Dredging of ash from Jhariya nala and Renuka river has been got done by UPRVUNL
through Irrigation Department U.P.
2.2.3 Size or Magnitude of Operation including Resources
Table 2.5 Salient Features of proposed power plant
S. No. Features Description
1 Capacity 1320 MW
2 Configuration 2X660 MW
3 Technology Super critical Technology
4 Power evacuation Through 400/765 KV line
5 Fuel requirement at 90% PLF 5.528 MTPA
6 Source of coal Saharpur-Jamarpani Sector, Brahmani Basin, Rajmahal group of Coalfields, Jharkhand.
7 Transportation By Rail
8 Sulphur content 0.4%
9 Ash content in coal 32%
10 Ash generation 1.76896 MTPA
11 Bottom Ash 0.353792 MTPA
12 Fly Ash 1.415168 MTPA
13 ESP efficiency 99.8%
14 Stack One stack of 275 m Height (Twin Flue)
15 Water requirement 45 cusec.(max)
16 Source of water Obra Dam of Rihand River
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21 Pollution Control Research Institute, BHEL, Haridwar
2.3. Layout Plan / Land Requirement
The proposed expansion is planned within the premises of existing plant and no additional
land is proposed to be acquired. UPRVUNL has identified about 550 acres of land, at the
existing Obra TPS for installation of this expansion project after demolishing the existing old
and dilapidated quarters in sectors 5,6 and 7 of present colony and adjoining land towards
north of sector 6 and abandoned ash dyke. Details of the same are summarized in Table
2.6 as given below:
Table 2.6
Land Distribution of Proposed Expansion
S.
No.
Particulars Area in acre (acre)
Existing Expansion Total
1 Plant 305
450 (300 acre for plant plot +
150* acre for green belt)
755
2 Coal Storage & Handling
3 Ash dyke/ pond 175 - 175
4 Green belt 120 346 466*
5 Railway siding 148 100** 248
6 Open area 735 - 735
Total land for plant (A) 1483 896 2379
7 Township (B) 805 50 (for R&R only) 855
Total Land (A+B) 2288 946 3234
*150 acre Included in the proposed Plant area
Note- Besides the above 150 acre in the plant area, UPRVUNL has also planned to develop
additional green belt in the abandoned ash pond area (about 346 acres) surrounding the proposed
Obra ‘C’ plant area as per directions issued by Expert Appraisal Committee, MoEF dated
05.11.2012. Budget allocation amounting Rs. 2.45 crore has also been made for carrying out the
forestation/ eco-restoration through U.P. forest department
**It is not included in the proposed Plant area. For this adjoining railway track shall be used.
Vicinity cum plot plan and Layout plan of the expanded plant are depicted as Figure 2.3 &
Figure 2.4.
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Units at Obra Thermal Power Station of M/s UPRVUNL.
23 Pollution Control Research Institute, BHEL, Haridwar
Table 2.7
Coordinates of Plot Plan
Direction Longitude Latitude(Y) North 82 ° 59 ' 14.74 " E 24 ° 26' 47.21 " N East 82 ° 59 ' 01.48 " E 24 ° 26' 56.64 " N West 82 ° 58 ' 59.13 " E 24 ° 27' 15.72 " N South 82 ° 59 ' 10.754 " E 24 ° 27' 21.29 " N
The nearest railway station is at Obra dam (2 km from plant) and Chopan (13 km from
plant) while nearest highway (Varanasi-Shakti Nagar highway) is about 8 km from project
site. Nearest airport is at Varanasi (about 125 Km from project site).
Co-ordinates of Ash Dyke:
Direction Longitude Latitude(Y) North 82 ° 57 ' 52.86 " E 24 ° 28' 34.53 " N East 82 ° 58 ' 16.65 " E 24 ° 28' 17.05 " N West 82 ° 57 ' 28.35 " E 24 ° 28' 16.72 " N South 82 ° 57 ' 48.88 " E 24 ° 27' 55.23 " N
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Environmental Impact Assessment of proposed 2 x 660 MW Extension
Units at Obra Thermal Power Station of M/s UPRVUNL
25 Pollution Control Research Institute, BHEL, Haridwar
2.4. Coal Requirement, Availability and Linkage
Coal requirement for proposed 2x660 MW units is estimated as 5.528 million tonnes/annum,
considering GCV of 4000 kcal/kg, design heat rate as 2250 Kcal/kWh and 85% PLF as per CERC
operative norms effective from 1/4/2009. The range for proximate analysis of the coal proposed to
be used is as given below in Table 2.8
Table 2.8
Coal Analysis
Range Proximate Analysis (as on received basis)
1 Volatile matter 22.5-25.8%
2 Fixed carbon 29.5-36.1%
3 Ash 17.9-43.5%
4 Moisture 6.0%-9.8%
5 GCV 3935-4380 (kcal/kg)
Saharpur-Jamarpani Sector, Brahmani Basin, Rajmahal group of Coalfields, Jharkhand coal
blocks have already been allotted by Ministry of Coal to UPRVUNL for Obra-‘C’ extension
project as per commitment letter enclosed as Annexure 4.0
For existing plant, coal is being received from coal mines of NCL and CCL and is transported
through railway wagons. The water is sprayed on the coal wagons before sending it to wagon
tippler. This reduces the fugitive emission to a great extent. The water sprinklers have also
been provided at wagon tippler, crusher houses and along the coal stock pile. Total land area of
plant and Township with the greenbelt is given below in Table 2.9
Table 2.9
Land Distribution of Proposed Expansion
S.
No.
Particulars Area in acre (acre)
Existing Expansion Total
1 Plant 305
450 (300 acre for plant plot +
150* acre for green belt)
755
2 Coal Storage & Handling
3 Ash dyke/ pond 175 - 175
4 Green belt 120 346 466*
5 Railway siding 148 100** 248
6 Open area 735 - 735
Total land for plant (A) 1483 896 2379
7 Township (B) 805 50 (for R&R only) 855
Total Land (A+B) 2288 946 3234
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*150 acre Included in the proposed Plant area
Note- Besides the above 150 acre in the plant area, UPRVUNL has also planned to develop
additional green belt in the abandoned ash pond area (about 346 acres) surrounding the
proposed Obra ‘C’ plant area as per directions issued by Expert Appraisal Committee, MoEF
dated 05.11.2012. Budget allocation amounting Rs. 2.45 crore has also been made for carrying
out the forestation/ eco-restoration through U.P. forest department
**It is not included in the proposed Plant area. For this adjoining railway track shall be used.
2.5 Technical Details of Proposed Expansion
2.5.1. Steam Generator and Auxiliaries
The steam generators shall be once through, water tube, direct pulverized coal fired, top
supported, balance draft furnace, single reheat, radiant, dry bottom type, suitable for outdoor
installation. The gas path arrangement shall be single pass (tower type) or two pass type. Boiler
design shall also be suitable for variable pressure operation from 30% to 100% BMCR with 20%
throttle margin. The main parameters at 100% BMCR will be is as given below in Table 2.10 :
Table 2.10
Main Parameters at 100 % BMCR
S.No. Particulars Value
1 Main steam flow at super heater outlet 2225 tph
2 Pressure at super heater outlet 256 kg/cm2 (a)
3 Temperature at super heater outlet 5400C
4 Re-heater steam flow 1763 tph
5 Steam temperature at re-heater outlet 5680C
The furnace will be radiant, dry bottom type with tangential or wall firing and enclosed by water
cooled & all welded membrane walls. The furnace bottom shall be suitable for installation of a
water impounded bottom ash hopper. Spray type attemperator is envisaged to control the
superheater outlet temperature for varying loads. The superheater and reheater tubes will be a
combination of radiation and convection type. Economizer will be non-steaming type and shall
be of modular construction so that if required, addition of loops is possible. Lower part of
furnace / water wall will consist of rifle/wrap around /helical/plane tubes as required.
A balanced draft system will be provided which includes two axial FD fans, two axial ID fans &
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two (2) pairs of regenerative rotary type air pre-heaters. One pair of air pre-heater will be used
for primary air system & second pair for secondary air system. Four (4) numbers of steam coil
air pre heaters – two (02) on primary and two (02) on secondary air system will be provided for
start-up, low load operation or abnormal conditions when an increased air inlet temperature is
considered desirable to minimize the cold end corrosion of regenerative air pre-heaters. Start-
up, warm up and low load (upto 30%) carrying shall be done by heavy furnace oil/HPS/LSHS.
Boiler will be so designed that oil firing for flame stabilization will not be required beyond 30%
MCR. There shall be light oil (LDO) firing at least in one burner elevation having a minimum
capacity of 7.5% BMCR to facilitate a cold start-up of the unit when no auxiliary steam is
available for HFO heating and atomization.
The coal burning system will comprise of coal mills of vertical spindle type which include (a)
bowl mills (XRP type), (b) roller mills (MPS type), (C) balls & race mills (E-type) or any approved
equivalent. The number and capacities of the mills shall be so selected that while firing the
worst and design coals at BMCR, the following spare capacities shall be ensured
With 90% loading of the working mills, at least one mill will be spare at 100% BMCR while
firing the worst coal;
With 90% loading of the working mills, at least two mills will be spare at 600MW load with
worst coal firing; and
With 90% mill loading of the working mills, at least two mills will be spare while firing the
design coal at 100% BMCR.
Coal from raw coal bunkers will be fed into the mills by belt driven gravimetric coal feeders
suitable for handling moist coal. There will be two axial P.A. fans for transporting the pulverized
coal from mills to burners.
Fully automatic, sequentially controlled, microprocessor based steam soot blowing system,
complete with provision for individual operation of any soot blower pair and facility to bypass
any soot blower, will be provided. The system will have short retractable rotary wall blowers for
the furnace and long retractable rotary blowers for the super heater, reheater and economizer.
Each of the unit will be provided with two auxiliary Pressure Reducing De-Superheating (PRD)
stations i.e., high capacity and low capacity PRDS taking their steam tap-offs from MS line and
CRH line respectively. The high capacity auxiliary PRDS will be designed for a minimum
capacity of 160 T/hr. Low capacities auxiliary PRDS will be sized for minimum 25 T/hr capacity
and will be operated during the normal operation of the unit. Auto-change over between the low
and high capacity auxiliary PRDS stations depending on the station auxiliary steam requirement
is also envisaged. Each unit will have its own auxiliary steam header whereas for station
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services, a common station auxiliary steam header is also proposed. A high temperature station
auxiliary steam header taking its tap off from the auxiliary PRD station before the desuperheater
will also be provided to take care of the mill firefighting and air heater soot blowing. The system
will be suitably interconnected with existing auxiliary steam system. No auxiliary boiler is
envisaged in the expansion stage.
It is proposed to install high efficiency electrostatic precipitator which limits the outlet dust
emission to 50 mg/Nm3 while the boiler is operating at its MCR, firing worst coal having
maximum ash content. To facilitate wider dispersion of emissions, a one bi-flue chimney of 275
m height will be provided.
2.5.2. Turbine and Its Auxiliaries
The scope of each TG unit of 660MW shall broadly cover the Steam Turbine along with its
integral systems and auxiliaries like lube oil system, control-fluid system, condenser, condenser
Two (2) D.M. water storage tanks each of 2000 m3 capacity shall be provided to store
DM water. One neutralization pit shall be provided for neutralizing the pH and
discharging the effluent water from the DM plant.
2.11.4 Chlorination Plant
Chlorination plant shall be provided for chlorine dosing in the CW system to avoid the
growth of algae and bacteria. Separate chlorination plant shall be provided for water
pre-treatment plant and CW system. CW chlorination system would consist of three (3)
numbers of chlorinator-evaporator sets of 100 Kg/hr capacity and pre-treatment
chlorination system shall consist of three (3) numbers of chlorinator sets of 15 kg/hr
capacity with associated pumps etc.
Each chlorination system shall be provided with required chlorine tone containers,
instrumentation, panels, chlorine leak detectors etc. Complete chlorination plant shall be
located indoor. Chlorine leak absorption system as plant emergency measure shall be
provided for each of the chlorination plants to neutralize chlorine leakage from the plant.
2.11.5 Condensate Polishing Plant
For maintaining the feed water purity, condensate polishing plant shall be provided in
the feed water cycle at the downstream of condensate extraction pumps as per the
existing practice. The condensate polishing plant shall be of full flow, deep mixed resin
bed type consisting of 2 x 50% capacity service vessels for each unit. The resins to be
used would be strongly acidic cation and strongly basic anion type, appropriate for
condensate polishing system. A common external regeneration facility shall be
provided. The exhausted charge of resins from the service vessel shall be hydraulically
transferred to the resin separation/cation regeneration vessel for regeneration and
reuse. Spare charge of resin shall be kept in the mixed resin storage tank for immediate
exchange of resins with the exhausted ones. One additional charge of resin shall be
procured for use during startup of both the units. Acid, Alkali & DM Water Storage for
regeneration, and Wastewater neutralization facilities shall be provided separately for
the external regeneration facility.
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2.11.6 CW Treatment System
It is proposed to provide suitable chemical treatment programme of acid dosing and
scale cum corrosion inhibitor dosing for the CW system for control of CW system water
chemistry. It is proposed to provide acid & chemical storage tanks and dosing pumps as
a part of CW treatment system.
2.11.7 Ash Water Re-circulation System
For re-circulation of ash water, modification in the natural ash dyke is to be done for
decanting pond. Decanted water from ash pond shall be fed to the plant area by using
3 x 50% capacity pumps and the same shall be conveyed from ash dyke to plant area.
This water will be used further in the ash handling system. Blow-down of ash water from
the system shall be carried out to maintain the system scale free. Normal make up to
the ash water system shall be from CW blow-down water. However provision shall also
be kept for operating ash water system on “Once Through” mode also. During “Once
Through” mode operation, additional makeup shall be met from the plant raw water
supply. Provision to supply treated plant effluent from central monitoring basin to ash
handling shall also be kept.
2.12. Pollution Generation and Management
2.12.1. Air Emission and Management
The main sources of the air pollution are:
Handling and storage of coal;
Combustion of coal in boilers;
Handling and disposal of fly ash; and
Operation of DG sets, in case of power break down.
The dust is the crucial parameter among the main pollutants like PM, SO2, NOx, CO, Hg
& O3. Installations of adequately sized pollution control equipment’s have been
considered for primary and secondary dust generating sources.
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The details of air pollution generation and its management during operation are given in
Table 2.17 and described below:
Table 2.17
Details of Air Pollution Generation and Management
S.N Particulars Sources Parameter
Control/Treatment
1 Stack emission
Boilers
PM, SO2, NOX, CO, Hg & O3
ESP with designed outlet dust concentration of 50 mg/Nm3; A twin flue chimney with stack height of 275 m shall be provided (Stack height as per 14Q0.3, where Q is the SO2 generation in Kg/hr); Sulphur content in coal: 0.4% A well-designed burner system to limit the core flame temperature to keep the Nox concentration at minimum; Keeping a positive oxygen balance.
DG sets Stack height as prescribed by MoEF 2 Fugitive
Emission Crushers and ash storage in silo
PM
Bag filters with designed outlet dust concentration of 50 mg/Nm3
Transfer points during collection and transportation of coal and ash
Bag filters with designed outlet dust concentration of 50 mg/Nm3 Pneumatic conveying system for fly ash transportation Water sprinklers and spray system
Storage of Coal & Ash
Water sprinklers and spray system
3 Thermal Emission
Boilers and pipelines used for steam
Heat
Adequate thickness of insulating material with proper fastening shall be provided
cat fishes, snake heads and barbus etc. Avi fauna has wide range of species occurrence
that varies upto 221 species of resident or migratory in nature.
3.7. R&R Plan
No R&R Plan is required as no land shall be acquired for the extension project.
3.8. Socio-Economic Environment
The Area and population of block Chopan is given in Table 3.54 below:
Table 3.54
Area and Population
Year/
Tehsil/Block
Area Total Population Male Female
2001 / Chopan Rural 229183 120184 108999
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There is no urban population in the study area. The SC & ST population in the Chopan
block is given below in Table 3.55.
Table 3.55:
SC /ST POPULATION
Year Tehsil/Block SC/ST Percentage (%)
2001 / Chopan 128644 56.2
The state of education is one of the most significant criteria for the development of a region.
The Educational Institutions in the study area as per block Chopan, district Sonebhadra are
given in Table: 3.56
Table 3.56
EDUCATIONAL INSTITUTIONS
(As per District Statistical Book 2011)
School Numbers
Jr. Basic School 277
Sr. Basic school 139
Higher Secondary School 10
Mahavidyalaya 2
Total 428
Health Centres like Hospitals & Primary Health Centre in the Chopan area as given below in
Table: 3.57
Table 3.57
HEALTH CENTRES
Chopan Hospitals Ayurvedic Centres
1 4
The Gram Panchayat Centres and Family Welfare Centres in the Chopan Block area as
given below in Table: 3.58 & Table 3.59 respectively.
Table 3.58
GRAM PANCHAYAT CENTRES
CHOPAN No. of Centres
Nyay Panchayat Nos. 9
Gram Panchayat Nos. 51
Panchayat Ghar Nos. 51
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Table 3.59
FAMILY WELFARE CENTRES IN CHOPAN
CHOPAN No. of Centres
Aganbari 208
Yuwa Sangthan 51
Mahila Mandal 33
Table 3.60
Population Details Of Chopan
(Source : District Statistical Books 2011)
Chopan Male Female Total
Rural 120184 108999 229183
From the above table it is observed that the male population is 120184 and Female
is 108999.
The literacy level of male and female population in Chopan is shown in Table 3.61.
Table 3.61
Percentage Literacy In Chopan
(Source : District Statistical Books 2011)
Block Male Female
Chopan 45.57 17.29
The overall literacy of the region is 32.26% and out of which 45.57 males are literate
however only 17.29% females are literate. The overall literacy of Sonebhadra is 49.34%.
Table 3.62
Details of Bank In Chopan
(Source : District Statistical Books 2011)
Area National
Bank
Regional
Rural Bank
Other National
Bank
Chopan 4 1 1
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The occupational pattern based on the type of work in Chopan Block is given in Table 3.63.
As we can be seen from the Table, the majority of populations are classified as Farmers
and agricultural labour.
Table – 3.63
Occupational Pattern Of Working Population In Chopan Block
(Source : District Statistical Books 2011)
Area
Chopan
Farmer Agricultural
Labour
Family Job Other Job Total Main
Job
Simant
Job
Total
Job
25807 11513 1175 10596 49091 34658 83749
The total population is 229183; out of this 83749 people are having jobs.
Some photographs of the study area are given below from Fig 3.15 to Fig 3.19
Fig- 3.15 Cattles in Obra Area
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Fig 3.16 Monkey in Obra Area
Fig 3.17 Babool tree (Acacia Arabica)
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Fig 3.18 Sheesham Tree
Fig 3.19 Mango tree
Chapter‐4
Anticipated Environment Impacts and Mitigation Measures
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4.0 Anticipated Environment Impacts and Mitigation Measures
During the construction and operation of thermal power project, certain
environmental impacts may be noticed. These impacts are different in its
characteristics and quantum during construction and operation phase. The
environmental impact during construction will be localized and short term with no
changes in use of the surrounding land as compared to the current conditions. These
impacts will primarily relate to the civil works period and less intensive impact is
expected during erection of the equipment and trial operation. However, the impacts
during operation phase are considered as long-term effects. But these impacts may
be controlled through selection of appropriate pollution control systems,
environmental management plan. The impacts during construction and operation
phase of proposed coal based power plant have been assessed and are as given
below :
4.1 Impacts during Construction Phase
The construction of a new power plant usually involves significant changes in
land use, which may be accompanied by direct social and ecological impacts.
The proposed 2 x 660 MW Coal based Thermal Power Project at Obra is to be
located at about 35 Km of Robertsganj. The existing road will be utilised for
movement of construction material, construction machineries and transportation of
power plant equipments. There is no requirement of additional land for development
of infrastructural facilities since the site is connected by roads and Highway. Nearest
railway station is Chopan. All these existing infrastructure will significantly reduce the
impacts during construction phase of these units for the proposed plant.
The time schedule for the main civil works (foundations for steam generators and
turbine units, transformers and condensers) is about 36 months.
The impact during construction phase has been shown in the impact matrix. This
impact matrix is based on methodology suggested by Clarketal. (1976) and indicates
Environmental Impact Assessment of proposed 2 x 660 MW Extension
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140
interaction between project activities and environmental parameters. The
construction phase activities are discussed as follows:
4.1.1 Land of OTPS
The required 550 acres land for 2x660MW Units is already available within premises
of OTPS. After reclamation of land, preparation of site grading, levelling will be
carried out. Presently the land is barren (waste) hence will experience marginal
adverse impact on the land use pattern which would be minimized through the
mitigation measure of development of Green Belt in the region.
4.1.2 Site Development
The development includes all the activities needed to make the site ready for
construction work. The area acquired for the plant is fairly undulated terrain. The
area will be cleared of all vegetation depending on the site uses. The process of site
clearing will not change the existing land use pattern. As a mitigation measure, Land
clearing for construction site will be kept at the absolute minimum practicable;
4.1.3 Civil Construction Work
Around 550 Acre of land from Obra existing plant colony will be reclaimed for the
proposed units including main plant area, auxiliaries of the power plant etc. The civil
construction work includes foundation and super structural work. The foundation
work involves digging and concrete work. Dust and noise pollution will be problems
during the civil construction work. The structural work will involve concrete, steel
work and masonry work etc. This will need use of equipments like mixers, welding
machines, cranes and hoisting devices etc. The structural work will also have
impact on water resources as water will be required during this phase of
construction.
Mitigation measure
Water sprinkling will be done periodically to suppress Dust and providing noise
barriers for noise pollution. Water pollution during construction work would be
controlled by using State of art construction tools and methods.
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4.1.4 Construction Materials
Construction materials like sand, mettle etc. will be available from nearby areas.
Sand from stone quarries around Robertsganj will be obtained. Cement and steel will
be purchased through Government agencies from Robertsganj. There will be
marginal impact on local ambient air quality due to transportation, handling and
storage of these construction materials.
4.1.5 Mechanical & Electrical Erection
The mechanical and electrical erection work of machines will involve use of
fabrication equipment, cranes etc. This will cause air and noise pollution at site.
Mitigation measure
Water sprinkling will be done during movement of heavy vehicles.
4.1.6 Immigration
A large number of labour force will be required during the construction phase of the
proposed power plant. As most of the population in the region is non-worker, most of
the labour will be coming from neighbouring villages and populated settlements.
Mitigation Measures
Since majority of the construction workers will be local people, no separate
infrastructure will be required to meet their requirements of housing, schools,
transport, health and cultural centres, shopping complex and civil facilities etc.
However, if any, required, same will be taken care under project facilities.
4.1.7 Staff Quarters and Other Requirements
The construction is planned to be done by contractors. Workers engaged in
construction work will be employees of the contractors, however, it will be ensured
that the workers coming from neighbouring villages be provided with necessary
facilities.
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Mitigation Measures
The resident contractual workers will be provided with Toilets at place of stay
and work to avoid environmental degradation.
It is envisaged that OTPS employees would be provided residential
accommodation at OTPS Colony.
The proposed project will generate employment opportunities during
construction as well as operation phase and this will provide direct and
indirect jobs to the local population.
The project will not disturb the existing social pattern of the area and due to
direct as well as indirect employment opportunities generated by temporary
injection of capital it will have a beneficial impact on the local economy.
4.1.8 Sanitation, Rest Room Facilities to Labour Force
The manpower required during construction phase will be employed on temporary
basis from the nearby villages in order to avoid the need to construct temporary
houses. However, the sites will also be provided with adequate and suitable sanitary
facilities to allow proper standard of hygiene. These facilities will include water
supply, sanitary toilets and some temporary housing etc.
Mitigation measures
For semi-skilled and skilled labours suitable temporary accommodation shall
be constructed/provided by the working agency including the facilities of
water, light and sanitary facilities in the Power house area.
Construction workers will be residing temporarily at the work site during the
construction phase. For them, the following infrastructural facilities would be
provided by the contractor as per conditions of contract :
A. Security B. Safety of facilities
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C. Gate control D. Soak Pit based sanitation scheme would be provided for construction
worker. E. Proper dispensary will be developed in the Plant premises. F. Adequate arrangements will be made for Kerosene/wood etc. G. Educational support for the workers will be provided by nearby
schools, OTPS will take up the appropriate steps and measures for their welfare.
H. Fire prevention I. Drinking water J. Crèche facilities
These are mandatory facilities to be provided by the contractor.
However, OTPS shall ensure that the contractor constructs Toilet compartments with
sufficient capacity septic tank and soak pits and also bathroom compartments at the
residential site (temporary hutments) and Toilet compartments and a hall for rest at
work site.
4.1.9 Water Resources
During the construction phase of proposed expansion, estimated total water
requirement is 50-100 m3/day, depending upon the type of construction activities.
This requirement of water will be drawn from dedicated intake canal originating from
Obra dam on Rihand river as per granted permission. As per geotechnical study
conducted on project site, Water table was encountered in borehole no. 01, 02, 03 at
8.0 m, 8.0 m and 6.5 m depth respectively. Water table was not encountered in
borehole no. 04 & 05 up to 10.0 m depth. Hence, interference of the construction
activities to the ground water will not be significant. It is recommended to carry out
foundation work during pre monsoon season. Hence, overall impact is rated as per
given below:
Impact Rating Water Resources Nature of impact Adverse Duration of impact Short term Impacted Area Localized Likelihood of occurrence Low Severity of impact Low Significance of impact Negligible
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Mitigation Measures:
Adequate water supply arrangement will be made at the construction site;
Continuous attempt will be made to optimize/reduce the use of water;
Continuous attempt will be made to avoid wastage and leakage of water;
Regular record of water consumption on daily basis will be maintained;
It is recommended to carry out the foundation work during pre monsoon season; and
Toilets and bathrooms on temporary basis will be provided at site,
4.1.10 Air Quality
The sources of air emission during construction phase will include site clearing,
removal and stockpiling of excavated soil, storage and handling of the construction
materials, civil & mechanical works, movement of vehicles to be used for
transportation of men and materials to the site and operation of construction
equipment/machinery and camp site. Emissions from them are expected to result in
degradation of air quality, primarily in the working environment affecting employees
involved in the construction activities. However, Suspended Particulate Matter (SPM)
in the ambient air will be coarse and would settle within a short distance close to the
construction site so measures will need to be taken to protect workers. Hence, dust
and other emissions are unlikely to spread sufficiently to affect the surroundings of
the construction site. Traffic to the different sites during construction will be more
intensive and much heavier than at present in normal operating conditions. In turn, it
will subject existing roads to more stress. The present road conditions are
reasonably good for proposed movement of traffic. Gaseous emissions like SO2,
NOx, CO, HC are also anticipated as a result of burning of fuel to accomplish
construction phase due to operation of machinery /equipment. As construction
activities will be mainly confined to project site only and for short duration, hence the
impact on the ambient air quality during construction and development phase is rated
as per given below:
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Impact Rating Ambient Air Quality
Nature of impact Adverse
Duration of impact Short term
Impacted Area Localized
Likelihood of occurrence High
Severity of impact Low
Mitigation Measures
Land clearing for construction site will be kept at the absolute
minimum practicable;
Construction site would be designed to minimize the removal of soil
and vegetation;
Debris from of dismantling the present structures shall be stored
properly, if to be used or removed from the site at the earliest;
Topsoil removed will be preserved for later reinstatement purposes by
piling it along a boundary of the site;
Dust suppression systems (water spray) will be used as per
requirement at the construction site;
Construction materials will be fully covered during transportation to
the project site by road; and
Earth moving equipment, typically a bulldozer with a grader blade and
ripper will be used for excavation work and regular monitoring of
ambient air quality.
4.1.11 Noise Level
The general noise level due to construction activities such as working of heavy earth
moving equipment and machinery installation may sometimes go upto 90 dB(A) at
the work sites during day time. The workers in general are likely to be exposed to an
equivalent noise level of 80-90 dB(A) in 8 hour shift for which all statutory
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precautions as per the law will be implemented. Use of proper Personal Protective
Equipment (PPE) will further mitigate adverse impact of noise on the workers, if any.
The impacts can be further minimized and made insignificant by using standard
practice of construction. The present noise level, monitored in the study area is well
within the prescribed standard by CPCB/UPSPCB Hence the impact on the noise
level during construction and development phase is rated as per given below:
Impact Rating Noise Level
Nature of impact Adverse
Duration of impact Short term
Impacted Area Localized
Likelihood of occurrence High
Severity of impact Low
Significance of impact Minor
Mitigation Measures
Provision of rubber padding/noise isolators;
Preventive maintenance of the machine/equipments will be
carried out;
Provision of silencers to modulate the noise generated by
machines; and
Provision of protective devices like ear muff/plugs to the
workers and.
Regular monitoring of noise level.
4.1.12 Water Quality
The wastewater generated during construction phase will be mainly from domestic
activities. The strength of total skilled, semiskilled and labour required for
construction shall be 1000 (peak) and 500 (average). Wastewater generated from
domestic purposes will be minimal as most of the workers will be from local area. As
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per geotechnical study conducted on project site, Water table was encountered in
borehole no. 01, 02, 03 at 8.0 m, 8.0 m and 6.5 m depth respectively. Water table
was not encountered in borehole no. 04 & 05 up to 10.0 m depth. Dewatering may
not be carried out. During monsoon period, the wastewater may be generated from
soil erosion. Soil erosion at project site would be increased as a result of excavation
of topsoil. This may result in suspended solids and turbidity in runoff water during the
monsoon period. However, this impact will be temporary in nature. Hence, overall
impact is summarized as given below:
Impact Rating Water Quality
Nature of impact Adverse
Duration of impact Short term
Impacted Area Localized
Likelihood of occurrence High
Severity of impact Low
Significance of impact Minor
Mitigation Measures
Major site clearing and excavation work will not be planned during
monsoon season;
Major site clearing and excavation work will not be planned during
monsoon season;
Separate drains will be provided for draining storm water to the
possible extent;
All the debris resulting from the site will be isolated from the waste
water and disposed off separately;
A sediment trap will be provided to prevent the discharge of excessive
suspended solids;
An oil trap will be provided in the drainage line to prevent
contamination by accidental spillage;
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To prevent contamination from accidental spillage of oil, the storage
areas will be bonded and will be inspected and cleaned at regular
intervals;
It is recommended to carry out the foundation work during pre
monsoon season. Adequate treatment plan will be prepared before
discharging of water, if foundation work is to be carried out during post
monsoon season;
Wash down area for cleaning of vehicles wheels will be provided and
wheel wash waste will be drained properly and routed through oil trap;
Waste water to be generated from the domestic activities at site shall
be sent to existing ETP under construction for existing plant; and
Regular monitoring of waste water quality to be drained.
4.1.13 Soil Quality
During construction phase, solid waste such as excavated soil, debris, metal waste
and oil & grease from construction machinery/equipment will be generated. This
waste may contaminate soil at construction sites temporarily and would be restricted
to a small area. Excavated topsoil will be used for backfilling and on completion of
construction; all waste will be cleared as soon as possible. During the construction
phase, hydraulic oil, fuels and lubricating oils would be used. There is potential for
accidental spills while re-fuelling or servicing vehicles and through breakage due to
wear and tear. Procedures for maintenance of equipment would ensure that this risk
is minimized and cleanup response is rapid if any spill occurs. During construction
phase, waste oil shall be generated as and when lubricating oil is changed. Waste oil
shall be collected through the drain ports and stored in leak proof steel drums and
sent to the Spent Oil Storage Site. The waste oil drums shall be properly identified
with label of what is contained in Hindi and English. Waste lubricant generated shall
be given to outside party for treatment, which shall be again used in the plant. The
solid waste generated by workers as municipal waste will be minimal as most of
them belong to local area. The solid waste so generated shall be collected and
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disposed off as municipal waste to the site allocated by local administrative
authorities. Other solid waste like debris, metal pieces, cotton waste etc so
generated will be collected and segregated and will be disposed off as per standard
practice. The overall impact is summarized as given below:
Impact Rating Soil Quality
Nature of impact Adverse
Duration of impact Short term
Impacted Area Localized
Likelihood of occurrence High
Severity of impact Low
Significance of impact Minor
Mitigation Measures
Land clearing for construction site will be kept at the absolute
minimum practicable;
Construction site would be designed to minimize the removal of soil
and vegetation;
Debris so generated from dismantling of structure shall be removed at
the earliest;
Adequate debris disposal plan shall be prepared after assessment of
quantity of same and before start of construction;
Topsoil will be cleared and stored for later reinstatement purposes by
piling it along a boundary of the site;
Every care will be taken to prevent soil erosion. Compaction and
stabilization will be resorted during backfilling to ensure that no top
soil is washed away;
Ensure restoration of land surface and landform consistent with the
condition and contours prior to commencement of construction;
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Litter, fuel, oil drums, used grease cartridges would be collected and
removed properly;
Dust bins will be placed at requisite locations; and
Lubricating waste oil will be collected separately in drums and will be
handed over to the authorized outside agency by UPSPCB as per CPCB
guidelines.
4.1.14 Components Creating Impacts to Socio-Economic Environment
The components of the construction phase that could result in effects on the socio-
economic environment include the following:
Property Management Proposed expansion is envisaged within the premises of
existing plant hence no additional land is proposed to be acquired. Hence, overall
impact is rated as:
Impact Rating Property Management
Nature of impact Beneficial
Duration of impact Short term
Impacted Area Localized
Likelihood of occurrence Low
Severity of impact Slight
Significance of impact Negligible
Employment
In addition to UPRUVNL staff, the strength of total skilled, semiskilled and labour
required for construction shall be 1000 (peak) and 500 (average). The labour
strength engaged in the construction will depend upon construction activities, since
many items of construction are labour intensive. Most of the unskilled and semi-
skilled labour will be by and large available from the nearby villages and towns.
Thus, impact on the physical and aesthetic resources will be minimal. Further local
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skilled, semi skilled and unskilled laboures will get indirect employment during the
construction phase. This might also result in a steep rise in agricultural wages in the
surrounding villages, especially at the time of harvesting for short duration. In
addition to direct employment, several opportunities for locals will be available in
terms of supply of construction materials & machinery, vehicles and other essential
commodities. Hence, overall impact is rated as:
Impact Rating Employment
Nature of impact Beneficial
Duration of impact Short term
Impacted Area Localized
Likelihood of occurrence Low
Severity of impact Low
Significance of impact Negligible
Mitigation Measures
Preference will be given to locals for temporary direct and indirect
employment;
Local suppliers for machineries and construction materials will be
given preference; and
Local transporters will be preferred for transportation of machinery/
materials.
Disturbance to Community Resources and Safety
The disturbance to the community resources and safety will be mainly due to
transportation of machinery and materials through public roads due to increase in the
local traffic. There is a requirement for warning signs to minimize damage to the
third-party vehicles. In addition, risk to public need to be managed by making
mandatory for placing warning sign on vehicles and keeping vigilance during
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transportation by proper training and adequate manpower on board. Hence overall
impact is rated as:
Impact Rating Disturbance to Community Resources
and Safety
Nature of impact Adverse
Duration of impact Short term
Impacted Area Localized
Likelihood of occurrence Low
Severity of impact Low
Significance of impact Negligible
Mitigation Measures
Proper planning and communication with traffic police;
Advance notice to local administration about the activities;
Proper cordon off the site with sign boards;
Diversion of traffic, if required;
Placing the warning sign board on the vehicles during transportation
of machinery and materials; and
Proper training to the drivers about public safety.
4.2 Environmental Impact Matrix – Construction Phase
The possible causes of effect relationship between the different project activities on
each of the major environmental attributes has been represented on Environmental
Impact Matrix and can be summarised in Table 4.1 below :
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Table 4.1
Environmental Impact Matrix – Construction Phase
Project
Activity
Affected
Attribute
Nature Degree of
Impact
a.
Civil Works
Water quality Depletion and Degradation Marginal
Hydrology Depletion Marginal
Air quality Degradation Marginal
Noise &
odour
Increase and may cause
some discomfort to local
people
Negligible
Employment Improvement; Deployment of
skilled and unskilled
construction workers.
Appreciable
Services Improvement; increase in
their activities
Appreciable
Land use Degradation Marginal
b.
Construction
material
storage and
handling
Air quality Degradation through use of
earth moving equipment.
Negligible
Noise level Degradation in noise level Negligible
Services Improvement Marginal
Employment Improvement Appreciable
c. Water
Requirement
Hydrology Depletion Marginal
d.
Mechanical
and
Electrical
erection
Air quality Degradation Negligible
Noise Degradation in noise Quality Marginal
Employment Beneficial, local people may
also get some direct
employment
Appreciable
Services Improvement, increase in
their activities
Marginal
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e.
Transport
Air quality Degradation;dust
contamination
Marginal
Noise level Increase (Degradation) Negligible
Employment Beneficial; local people may
get direct/indirect
employment
Marginal
Services Improvement, commercial
activity would increase
Marginal
Health Some effect due to
movement of vehicles
Negligible
f.
Immigration
Water quality Strain on resources Negligible
Services Improvement Marginal
g.
Staff
Housing
Water
Quality
Degradation Negligible
Housing Increase through staff
quarters PPGCL colony.
Appreciable
Services Improvement Appreciable
Health &
education
Improvement
Appreciable
Land use Alteration Negligible
Impact Matrix
Based on various activities in construction phase as described earlier in this section,
it is evident that the construction activities are likely to affect the environment in
varying degree. The environmental parameters are classified in three major groups
as given in Table 4.2 below:
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Table 4.2
Classification of Environmental Parameters
1. Physical Environment - Topography
- Hydrology
- Air Quality
- Noise and Odour
- Water Quality
2. Ecological Environment - Forest and vegetation
3. Human Environment - Employment
- Rehabilitation
- Housing
- Services
- Health
- Education
The environmental matrix points out each activity and its impact on specific
environmental parameters. The final assessment of Environmental quality is done
after taking into account for the operational phase of the project and all pollution
control measures to be implemented during the project work. Environmental Impact
matrix for the construction phase is shown in Table 4.3 below :
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Table 4.3
Environnemental Impact Matrix - Construction Phase
ENVIRONMENTAL
PARAMETERS
T
O
P
O
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R
A
P
H
Y
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A
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I
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A
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N
A
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R
I
C
U
L
T
U
R
E
ACTIVITIES
Civil Construction
Work
* * * * * * * * * *
Construction Material
Storage & Handling
* * * * *
Water Requirement *
Mechanical &
Electrical Erection
* * * *
Transport * * * * *
Immigration * * * *
Staff Housing * * * * *
``*" indicates some environmental impact either beneficial or detrimental
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4.3 Environmental Control Measures during Construction Phase
The construction phase of the project will have some impacts on the environment.
These impacts can be minimised/neutralized, if some environmental control
measures are undertaken. Some of the environmental control measures to be taken
during this phase are proposed as follows :
Dust
Suppression
Dust will be a major pollutant during this phase. Dust pollution
will not only affect environmental air quality but also affect
health of the workers and local population as well. Sprinkling of
water during digging works, material handling in dust prone
areas should be taken up.
Workers/Staff
Colony
The workers will be mostly from the local population and
neighbouring villages. There will be few temporary housing
arrangements for the work force during this phase. Most of the
casual workers employed by contractors will be employed from
the local population and they will be coming from the
neighbouring villages. The departmental staff during
construction phase will be provided accommodation at OTPS
Colony.
Sanitation/other
Services
Since there will be housing colony foreseen for workers as well
as departmental staff during construction phase, sanitation
problem will not exist. However, Toilets at place of work and
few hutments will be provided for contact workers.
Water Supply /
Fuel
Requirements
Water will be required for human activities as well as
construction work. Adequate supply of water and fuel required
by workers will be arranged so that workers do not strain
existing resources further.
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4.4 Impacts During Operation Phase
The impacts during operation phase of the project have to be taken as long-term
effects.
Operation phase of the proposed expansion mainly comprises of the following
activities:
Transportation of coal to the plant site;
Storage, handling and crushing of coal;
Transportation of coal & rejects;
Water treatment;
Steam generation and transportation;
Electricity Generation and transmission;
Cooling & heat recovery;
Storage, handling and transportation of fly & bottom ash; and
Vehicular movement.
Details of wastes anticipated during operation phase are as follows:
Air emissions from operations as defined above, shall be Particulate
matter, NOx, SO2 and CO; Fugitive dust from coal and ash handling;
Waste water generation shall be mainly anticipated from
Blow down from boilers and cooling tower;
Rejects and back washes from DM plant;
Waste water from ash pond; and
Domestic usages from plant and Township.
Solid waste shall be mainly generated from coal mill, ash from coal
burning in boilers, water treatment plant, wastewater treatment plant,
waste lubricating oil from machinery/equipments and municipal waste
from domestic usages.
Accidental spillage of oil, if any. The control measures for mitigation of
negative impacts have been discussed in the previous chapters.
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However, the final impacts during operation phase of proposed coal
based power plant have been assessed and are as given below :
Air Quality
Current baseline air quality study indicated that background concentration of PM 10
and PM 2.5 in Ambient Air is not in permissible limit but SO2, NOx, CO, Hg & Ozone
are within limits of National Ambient Air Quality Standards for Residential & Rural
areas as prescribed by Central Pollution Control Board for residential areas.
The emission from the proposed power project will mainly consist of Suspended
Particulate Matters (PM10 & PM2.5), NOx and SO2. In order to control SPM from the
power plant, High efficiency (99.99 %) Electrostatic precipitators (ESP) would be
installed.
Current baseline air quality study indicated that background concentrations of
Particulate Matters (PM10 & PM2.5) are not within limit but SO2 and NOx are within
limits for residential areas. The air dispersion prediction model shows that during
normal operation with the two stacks of 275 meter height, maximum ground level
concentration of SPM, SO2 and NOx will not exceed the permissible norms of
National Ambient Air Quality for residential & mix use areas.
ISCST-3 model indicates that the maximum ground level concentration after
commissioning of the proposed plant will be within specified limits. The incremental
change in concentration in all other parameters will be negligible. The maximum
impact would be at a distance of 3.0 kms SE from source under normal operation.
There will be marginal impact on ambient air quality in and around the proposed
project site due to construction activities, transportation, handling and storage of
construction materials. However, the impact on air quality will not have long term
effect in the region.
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The air quality impact of operation of proposed power project would be within
allowable limits for Residential and Rural areas. Thus, there will not be significant
impact on air quality due to emission of Suspended Particulate Matters, Suplhur Di-
oxides and Oxides of Nitrogen to operation of coal based thermal power project at
Obra.
Mitigation measures
High efficiency (99.80 %) Electrostatic precipitators (ESP) would be installed.
The ESP would be designed to limit the particulate emission to 50 mg/Nm3.
To facilitate wider dispersion of pollutants and in accordance with the
regulatory requirement, chimneys of 275 m height above plant grade level are
envisaged for this project. Emissions through these tall stacks will help in
effective dispersion of gaseous pollutants in the atmosphere and thereby
minimising effect on ground level concentration of pollutants.
The chimney shall be provided with sampling points for continuous online
monitoring system for stack emissions.
Space will be provided for retrofitting the Flue Gas De-sulphurisation (FGD)
system. The design and layout of steam generator and its auxiliaries would
be such that a wet/dry FGD system can be installed in future, if required.
Fugitive dust emission at coal handling, other vulnerable areas of the plant
will be controlled by regular sprinkling of water and Green Belt development.
Green House Gases
Annual targets will be set up for coal, power and water consumption;
Using latest available technology for monitoring of process parameters;
Energy audit & water audit will be carried out on regular basis for keeping
check on power and water consumption and exploring the possibilities for
further reduction
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Transportation & Traffic Density
Road traffic to and from the proposed expansion during operation phase would not
be so intensive and heavier than at present as envisaged main mode of
transportation of the materials will be via railways. Hence, Traffic density will be
increased marginally as result of proposed expansion due to domestic movement. In
turn, it will contribute to noise as well as ambient air quality in terms of dust and other
gaseous pollutants. The regular maintenance of vehicles will limit the pollutants
within prescribed standards. The present road conditions are reasonably good for
proposed movement of traffic. Hence, overall impact is rated as:
Impact Rating Traffic Density
Nature of impact Adverse
Duration of impact Long term
Impacted Area Localized
Likelihood of occurrence High
Severity of impact Slight
Significance of impact Negligible
Mitigation Measures
All vehicles and their exhausts would be well maintained and regularly
tested for emission concentration;
Truck/trailers shall be parked made in designated parking area only;
Minimize use of roads at any particular time by planning vehicles
movements;
Advise traffic police about the activities; and
Road crossings to be used will be well marked.
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Noise Levels
With the Mitigation measures, the noise levels will be further restricted within very
short distance from the sources. The operators/personnel working near the noise
sources in the plant will be provided with earmuffs and earplugs. Hence, overall
impact is given below:
Impact Rating Noise Level
Nature of impact Adverse
Duration of impact Long term
Impacted Area Localized
Likelihood of occurrence High
Severity of impact Low
Significance of impact Minor
Mitigation Measures
All rotating items will be well lubricated and provided with enclosures
as far as possible to reduce noise transmission. Extensive vibration
monitoring system will be provided to check and reduce vibrations.
Vibration isolators will be provided to reduce vibration and noise
wherever possible;
In general, noise generating items such as fans, blowers,
compressors, pumps, motors etc. will be so specified as to limit their
speeds to generate minimum noise levels. Static and dynamic
balancing of equipment will be insisted upon and will be verified
during inspection and installation. All the blower house buildings will
be made sound proof
Provision of silencers will be made wherever possible;
The insulation provided for prevention of loss of heat and personnel
safety will also act as noise reducers;
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Layouts of equipment‘s foundations and structures will be designed
considering the requirement of noise abatement;
Central control room(s) provided for operation and supervision of plant
and equipment will be air-conditioned, insulated and free from plant
noise. Necessary enclosures will also be provided on the working
platforms/areas to provide local protection in high noise level areas;
Proper housekeeping to avoid excessive noise generation;
In case where the operation of the equipment warrants the presence
of operators in close proximity to equipment, the operators will be
provided with necessary safety and protection equipment such as ear
plugs, ear muffs etc.;
By provision of green belt /plantation in and around the plant
premises; and
By these measures, it is anticipated that noise levels at the boundary
of the plant premises will be maintained below 75 dB (A). Earth
mounds and plantations in the zone within the plant premises would
further attenuate noise.
Water Pollution
Water is one of the important requirements for power generation. Total water
requirement for the proposed power plant (54 cusec) would be drawn from Obra
dam, Rihand river and stored in a water reservoir. Irrigation Department, U.P. has
confirmed the allocation of 54 cusecs (5505 m3/hr) of water for the proposed project.
Mitigation Measures
The surface water through reservoir will be sent to water treatment plant. The
clarified water from the clarifier will then be sent to cooling towers as make up
water. The main requirement of water in Power Plant would be make-up
water for cooling tower. Total make up water requirement for the proposed
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project would be 5505 m3/hr with clarified water after passing through
pressure filter will be sent to De-Mineralisation (DM) plant.
During the operation of the thermal power plant, waste water would also be
generated from various sources viz. cooling tower blow down, blow down from raw
water treatment plant, waste from DM plant during regeneration of columns and ash
pond overflow etc.
Mitigation Measures
It is proposed to provide ash water re-circulation system to meet the
requirements of environmental authority. Decanted water from ash pond shall be
led to the plant area through pumps. This water will be used further in the ash
handling system. Normal make up to the ash water system shall be from CW
blow down water. Provision to supply treated plant effluent from central
monitoring basin to ash handling shall also be kept.
The effluent management scheme would essentially involve collection, treatment
and recirculation/disposal of various effluents. Adequate treatment facilities
would be provided to all the waste streams emanating from the power plant to
control water pollution. This would include physico-chemical treatment for plant
effluent and biological treatment for sanitary effluents.
Efficient operation of treatment plants would be ensured so that the quality of
effluents conforms to the relevant standards prescribed by the Regulatory
Agencies. All the treated effluents would be discharged through a single point
outlet from Central Monitoring Basin (CMB) and will be used for Green Belt
Development within the plant premises.
The discharged effluent quality will meet the norms laid down by U.P. Pollution
Control Board for discharge on land. Hence, there will be no significant impact due to
discharge of waste water on the environment.
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Domestic (Sanitary) Effluents
Mitigation Measure
The sewage from plant and township shall be led to an activated sludge process
based sewage treatment plant proposed to be provided at township to control BOD
and suspended solids. The treated effluent conforming to prescribed standards shall
be used for Green Belt Development inside the premises.
Land
UPRVUNL has identified about 550 acres of land, at the existing Obra TPS for
installation of this expansion project after demolishing the existing old and
dilapidated quarters in sectors 5, 6 & 7 of their colony and adjoining land towards
north of sector 6. Out of this 78 acre is covered by hill in sector-6 and 115 acres land
of sector-10 is on the other side (eastern) of the railway line. To accommodate the
main power block of 2x660 MW super critical units some portion of hillock
area(approximately 180 m wide) may be required to be cut and cleared to suit the
site requirement. In addition to this some more land (50 acres) shall be extended in
the eastern side by dismantling some residential quarters. Total site land identified
for the Expansion project is approximately 450 Acres after demolition of quarters,
cutting of hillock area and boundary extension in eastern side.
Mitigation Measures
Green belt shall be provided along the boundary wall as much as possible.
For additional requirement of green belt 346 acres of abandoned ash dyke
area shall be used.
The land required for storage of construction material and site office/labour
colony same abandoned ash dyke shall be used during construction phase.
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Housing
The construction is planned to be done by contractors. Contract workers engaged in
construction work will be employees of the contractors, however, it will be ensured
that the workers coming from neighbouring villages be provided with other necessary
facilities.
Mitigation Measures
The resident contractual workers will be provided with Toilets at place of stay
and work to avoid environmental degradation.
The infrastructure support facilities in the township would include different
types of accommodation alongwith armoury for Security staff, 25 bedded
General Hospital with support facilities, Estate office, Union/Association
offices, Nursery, Senior Secondary School, Shopping centre, Bank, Post
office, Telephone exchange, Petrol pump, Parks, Welfare Association Club,
Bal Bhawan, Ladies Club, Community centre, Swimming pool, Sports
complex with play fields, Auditorium, Guest house, Field hostel facilities and
space for religious places etc.
The installation of proposed coal based thermal power project and operation of the
plant will have marginal adverse impact on local housing.
Impact of the Project on Infrastructure Facilities
The proposed 2 x 660 MW Coal based Thermal Power Project at Obra is to be
located at about 35 Km from Robertsganj city. The project site is adjacent to state-
Highway connecting Varanasi-Shaktinagar, all the infrastructure will be readily
available. The existing road will be utilised for movement of construction material,
construction machineries and transportation of power plant equipments. There is no
requirement of additional land for development of infrastructural facilities since the
site is connected by roads. The site is also adjacent to Varanasi–Shaktinagar main
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line. Nearest railway station Chopan is about 12 kms from the proposed project site.
This entire existing infrastructure will significantly reduce the impacts during
construction phase of these units for the proposed plant.
Mitigation Measure
The strengthening of existing road network would be made for the project by State
Public Works Deptt. of U.P. Govt. as per requirements.
Employment
The installation of proposed power project will generate employment opportunities
during construction as well as operation phase and thus will provide direct and
indirect jobs to the local population.
Mitigation Measure
The project will not disturb the existing social pattern of the area and due to the
employment opportunities generated; it will have beneficial economic impact on the
area.
Aesthetics
The effective pollution control equipment help to maintain the visual quality of air and
water environment. Natural vegetation and its diversity will increase due to green belt
development. The aesthetics of the area is expected to improve after installation of
proposed 2 x 660 MW thermal power project.
Socio-Economic Environment
The impacts on socio-economic status of the project area are predominantly positive
and no adverse changes are expected.
The proposed project at Obra will generate employment opportunities during
construction as well as operation phase and thus will provide direct and indirect jobs
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to the local population. The project will not disturb the existing social pattern of the
area and due to the employment opportunities generated in the society where
majority of population has no regular job, it will have beneficial economic impact on
the area.
The additional power generated would lead to availability of power to the area and
state. This would result in increased power supply to rural areas. An increase in
sanitation, education and transportation facilities is expected due to proposed power
project. The economic output due to proposed power project would be positive
besides enhancement of community services. The proposed power project will lead
to development of the area. Hence, it will have beneficial effect on the society.
Ecology
There may be some negative impacts on terrestrial ecosystem namely crops and
vegetation due to dispersion of fly ash. However, with efficient control systems for
particulate and tall stacks for gases, no significant adverse impacts are foreseen
which can disturb the ecological balance of the area.
The aquatic life will not be affected because of low water requirement,
Mitigation Measure
No effluent discharge from proposed thermal power project and closed cycle system
for cooling water. Hence, the proposed plant will not have any significant detrimental
impacts on plants, animals, soil and other ecological targets around the proposed
site as a whole.
Education & Health
The infrastructure support facilities would be developed in the proposed township
would also include General Hospital with support facilities and Senior Secondary
School. Hence there will be positive impact on education & health services in the
area due to the proposed power plant.
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Socio-Economic Environment
Employment and Economic Growth
Establishment or expansion of any industrial activities, results in industrial growth,
which in turn would generate direct and indirect opportunities of employment and
business in the region. In addition to direct employment opportunities, significant
number of casual labour will be required. Number of indirect employment will also be
generated on local and regional basis.
There will be an increase (directly and indirectly) in the payment of royalty, excise
duty and sales tax to Government due to the proposed expansion. Additional
population due to proposed expansion will also contribute in terms of employment
and business opportunities for locals. Hence, overall impact is given below:
Impact Rating Employment & Economic Growth
Nature of impact Beneficial
Duration of impact Long term
Impacted Area Localized
Likelihood of occurrence High
Severity of impact Medium
Significance of impact Moderate
Mitigation Measures
Preference will be given to locals for direct and indirect employment;
Local suppliers for machinery and materials will be given preference;
and
Local transporters will be preferred for transportation of
man/machinery/materials.
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Socio-Economic UPRUVNL is committed to contribute to improve the socio-
economic conditions of the area but being a government organization, UP
Government is mainly taking care of welfare schemes. UPRVUNL is only providing
direct and indirect employment.
4.5 Operation Phase Impact Matrix
The various possible cause effect relationships between the different project
activities on each of the major environmental attributes has been represented on
Environmental Impact Matrix and can be summarized as follows:
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Table 4.4
Cause effect relationship
Project Activity Affected attribute Nature
a. Plant
Commissioning
- Noise level - Increase (Degradation)
- Water quality - Degraded
- Hydrology - Depletion
- Employment Increase in direct /indirect
potential
- Air quality - Degraded
- Services - Improvement
- Housing - Stressed
- Health - Degrade
b. Water
Requirement
- Hydrology - Depletion
- Aquatic life - Degraded
- Agriculture - Depletion
c. Effluent
Discharge
- Water quality - Degraded
- Agriculture - No effect
d. Solid Waste
Disposal
- Water quality/Soil - Not affected
e. Gaseous
Emissions
- Air quality - Degraded
- Health - Adversely affected
f. Material
Handling
- Air quality - Degraded due to
transportation/unloading
- Employment - Increase
- Services - Degraded
g. Equipment
Breakdown
- Water quality - Degraded
- Air quality - Degraded
- Noise quality - Degraded
- Services - Stressed
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Project Activity Affected attribute Nature
h. Thermal
Dispersion
- Water quality - No effect as closed cycle
cooling system will be
used
i. Transport
- Air quality - Adverse effect; lot of dust
and smoke is put into air
- Noise - Degradation; vehicles
cause lot of noise
- Employment - Increase in potential
- Health - Adverse effect
j. Staff Colony
- Water quality - Degraded
- Housing - Stressed
- Services - Degraded
- Health &
education
- Stressed
k. Schools and
Hospitals
- Services - Stressed
- Health and
education
- Stressed
l. Effluent
Management
- Water quality - Improved
- Services - Improved
Based on the activities of operational phase of the power plant the operation phase
impact matrix has been prepared and is given in Table 4.5. This matrix is based on
Leopold method. The vertical side of this matrix gives project activities and
horizontal axis gives the environmental factors for physical, ecological and
human environment.
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Table 4.5
Environmental Impact Matrix - Operation Phase
ENVIRON MENTAL
PARAMETERS
T L W H A N F A E H S H R A
O A A Y I O O Q M O E E E G
P N T D R I R U P U R A H R
O D E R S E A L S V L A I
G R O Q E S T O I I T B C
R U L U T I Y N C H I U
A S Q O A & C M G E L L
P E U G L & E S & I T
H A Y I O L N T U
Y L T D V I T E A R
I Y O E F D T E
T U G E U I
Y R E C O
T A N
A T
T I
I O
O N
N
ACTIVITIES
Plant Comm. * * * * * * * *
Water Requir. * *
Effluent Discharge * *
Solid Waste Disposal * *
Gaseous Emissions * *
Material Handling * * * *
Equip. Breakdown * * * *
Transport * * * * *
Immigration * * *
Staff Colony * * * *
Schools & Hospitals * *
Effluent Mgmt. * *
``*" indicates some environmental impact either beneficial or detrimental
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It is observed from the matrix that there is marginal impact on water quality,
hydrology, air quality, noise, vegetation, aquatic life, employment and land use.
These impacts could be either beneficial or detrimental as shown in the matrix.
The land proposed to be used for establishment of the project is barren/single crop
agricultural in nature. The land use will be changed from barren/single crop
agricultural to industrial due to proposed project. This change in land use would help
in overall socio – economic development of the region. This marginal impact on the
land use pattern would be minimized through development of Green Belt in the
region.
In operation phase there will be some adverse impact on Water and Air Quality. All
the plant effluent would be suitably treated and discharged to central monitoring
basin. Combined plant effluent will then be used for green belt development within
the power plant premises.
Current baseline air quality study indicated that background concentration of SPM,
(PM10 & PM2.5) are not within limit and SO2 and NOx are within limits for residential
areas. The addition of coal based thermal power plant would result in increase in
values of these parameters. The air dispersion prediction model shows that with the
stack height of 275 meters, maximum ground level concentration of these pollutants
will not exceed the permissible norms of National Ambient Air Quality. The proposed
plant will not have any significant impact on the air quality of the region as a whole.
4.6 Environmental Impact Matrix
The overall environmental impact of the project can be quantitatively assessed
through environmental impact matrix by assigning weightages to various
environmental parameters in the matrix. The weightage values are subjective but
have been achieved after considering inter-disciplinary judgment based on the type
of the project. The environmental impact matrix for the proposed 2 x 660 MW coal
based thermal power project at Obra is shown in Table 4.6.
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Sub Total = - 50 -5 -20 -30 -20 -40 -25 -5 +90 +5 +10 0 0 -10
PLANT COMMISSIONING -1 -1 -1 +2 +1 -1 -1
WATER REQUIREMENT -2 -1
EFFLUENT DISCHARGE -1 +1 -1
SOLID WASTE DISPOSAL -1 -1 -1 +1 +1
GASEOUS EMISSIONS -2 -1
MATERIAL HANDLING -1 -1 +1 -1
EQUIPMENT BREAKDOWN -1 -1 -1
TRANSPORT -1 -1 +1 +2 -1
IMMIGRATION +1 -1 -1 -1
STAFF COLONY -1 +1 +1 -1
SCHOOLS & HOSPITALS +1 +1
EFFLUENT MANAGEMENT +1 +1 +1
Sub Total = - 90 -5 0 -40 -30 -50 -20 +10 -5 +60 +5 +5 -20 0
TOTAL = -140
Total : - 140
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The following scale was used for assessing the degree of impact :
Insignificant impact 0
Minor impact 1
Appreciable impact 2
Significant impact 3
Major impact 4
Major permanent impact 5
The impact value and assessment decision for the project are as given below :
Impact Value Range Assessment Decision
0 to 100 No appreciable impact
101 to 200 Impact on environment but not injurious in general
however mitigation measures are important.
201 to 400 Major injurious impact, site selection to be
reconsidered
401 to 500 Alternative sites to be considered.
It is found from the environmental impact assessment matrix that there will be impact
on environment but it will not be injurious, in general. However, mitigation measures
are important. These mitigation measures would be ensured through development of
efficient environmental management system at the proposed power project.
Chapter‐5
Analysis of Alternative Sites & Technology
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5.0 ANALYSIS OF ALTERNATIVE SITES & TECHNOLOGY
5.1 Introduction
In this chapter, alternatives options for technology & site considered for the
proposed expansion are evaluated and discussed with particular emphasis on
environmental considerations.
The proposed entire generation is to be utilized to meet the power requirement of
Uttar Pradesh and the surplus power, if any shall be fed into Northern Grid to
meet the power requirement of other states.
The project alternatives discussed here include the rational for the proposed
expansion siting, raw materials availability and production technology, etc.
However, adequate analysis of all the potential alternatives applicable to the
production technology cannot be conducted at present as at the time of
preparation of this report, assessment of various scenarios of project
development are still in progress.
Prior to arriving at a decision regarding establishment of proposed expansion
within premises of existing plant, a number of alternatives were examined and
reviewed. The options considered were:
With no expansion of project;
Establishment of proposed expansion at new site; and
Establishment of expansion at the same site.
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5.2. With no expansion of project
No Expansion option also implies that no additional generation of power will take
place. Also existing plant is too old to provide sustainable production of power.
Failure to implement the proposed expansion would involve the following:
No utilization of land available for expansion;
Likely closure of existing plant, as the plant in present configuration is not
economically viable
Interruption in generation of power which shall further increase existing gap
between demand and supply of electricity;
Direct and indirect employment opportunity for the locals or otherwise may
cease;
Lay-OFF of existing employees may become inevitable;
No development work in and around the plant; and
Loss of opportunity to increase both direct and indirect revenue at local, state
and national levels.
A development activity in an area inevitably involves its alteration from the
environmental point of view. However, to manage this alteration, a cost benefit
analysis of the project must also consider all the socio-economic elements in
question in addition to ensuring the maximum protection of environment by use
of latest, state-of-the-art technologies.
Therefore, choosing the No expansion option would mean a loss of preliminary
investments on the project and there would be no benefit to the nation. This shall
further slowdown the growth rate of industrial sectors and no new employment
opportunities would be created. Nonetheless, there will not be significant
alteration of the environment apart from nature induced changes that would
invariably have no impact.
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5.3. Establishment of Proposed Expansion at New Site
This option implies for:
Establishment of new infrastructural facilities and utilities along with main
Equipment Machinery
Requirement of additional land for infrastructural facilities at new site;
Requirement of more additional manpower; and
More project cost.
Therefore, choosing the establishment of Proposed Expansion at New Site
will mean additional preliminary investments on the project and more time,
which shall not be favourable for a resource crunch state like U.P.
5.4. Establishment of Proposed Expansion at Same Site
In this section, alternatives considered for the basic design of the proposed
expansion are evaluated and discussed with particular emphasis on location,
materials of use, configuration & technology, operation and environment
planning.
5.4.1. Location
The proposed expansion is to be within the premises of existing plant located in
Obra village of Robertsganj tehsil of Sonebhadra district, Uttar Pradesh. No
alternative site is taken into consideration since this site is conceived from the
proposal stage due to following reasons:
Existing plant site has sufficient land required for expansion;
Existing Infrastructural facilities, utilities and manpower available in existing
plant will be extended to proposed expansion;
Approachability via rail and road is excellent;
Availability of water resources is in close proximity;
Established route of transportation for coal and water is in line with existing
plant; etc.
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5.4.2. Raw Material
Major raw materials for power plant are coal and water. Ministry of Coal,
Government of India has already allotted coal blocks Saharpur-Jamarpani
Sector, Brahmani Basin, Rajmahal group of Coalfields, Jharkhand to UPRVUNL
as per commitment letter enclosed as Annexure-4.0
UPRVUNL has confirmed commitment of additional 54 cusec water from Rihand
river which is also supplying water for existing operation.
5.4.3. Configuration and Process Technology
The feasibility report for the proposed expansion has been prepared taking into
consideration the most modern state of art equipment/machinery which would
have maximum efficiency, minimum emission levels and waste generation. All
envisaged equipment’s/machinery are commonly used for this application as they
have minimum negative impact on the environment.
For any power plant, a minimum of two units are recommended for installation
with a view of ease of availability of startup power in addition to flexibility in
operation. In view of above, following configurations are considered:
Subcritical units
500 MW
600 MW
Super critical units
660 MW
The study indicates the following:
600 MW unit is marginally advantageous w.r.t. 500 MW unit due to the
advantage of larger capacity. All other factors such as operational efficiencies
are similar in both sizes of units;
Configuration of 2X660 MW will have the advantage of lower capital cost and
higher operating efficiencies. The two unit configuration can be advantageous
as due to the repetition, flexibility in operation planning as well as
considerable saving in inventory of spares; and
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Due to advantage of super critical technology over sub critical technology as
described below, option of 660 MW is considered over 500 MW.
5.4.4 Advantage of Supercritical Technology
The development of coal fired supercritical power plant technology can be
described as an revolutionary advancement towards greater power output per
unit and higher efficiency. Energy conversion efficiency of steam turbine cycle
can be improved by increasing the main steam pressure and temperature.
As name suggests, coal-fired supercritical power plants operate at very high
temperature and pressure (5800C temp. with a pressure of 23 MPa) resulting
much higher heat efficiencies (46%), as compared to sub-critical coal-fired plants
which operates at 455 0C temp., and efficiency within 40%. Some of the benefits
of advanced supercritical power plants include:
Reduced fuel costs due to improved plant efficiency
Significant improvement of environment by reduction in CO2 emissions;
Plant costs comparable with sub-critical technology and less than other clean
coal technologies;
Much reduced NOx, SOx and particulate emissions;
Can be fully integrated with appropriate CO2 capture technology
a. Efficiency
The main advantage and the reason for a higher pressure operation is the
increase in the thermodynamic efficiency of the Rankine cycle. Increase in
efficiency directly lead to reductions in unit cost of power and CO2 emissions.
b. Operational Flexibility
Most of the Supercritical units use the once through technology. This is ideal for
sliding pressure operation which has much more flexibility in load changes and
controlling the power grid. However this also requires more sensitive and quick
responding control systems.
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c. Evaporation End Point
In subcritical units, the drum acts as a fixed evaporation end point. The furnace
water walls act as the evaporator. Not so in the case of a supercritical unit. The
evaporation end point can occur in various levels of the furnace depending on
the boiler load. The percentage of superheat in supercritical unit is higher than
subcritical units. Because of this the furnace tubes act more as super heaters
than water walls. This necessitates the use of higher grade of materials like alloy
steels in the furnace.
d. Heat transfer Area
Higher steam temperature in supercritical unit results in a lesser differential
temperature for heat transfer. Because of this heat transfer areas required are
higher than subcritical units.
Higher Superheat steam temperatures entering the HP turbine also mean higher
reheater inlet temperature which again results in a higher heat transfer areas.
e. Water chemistry
In supercritical units the water entering the boiler has to be of extremely high
levels of purity. Supercritical boilers do not have a steam drum that separates the
steam and the water. If the entering water quality is not good, carry over of
impurities can result in turbine blade deposits.
f. Materials
Supercritical power plants use special high grade materials for the boiler tubes.
The turbine blades are also of improved design and materials. In fact, the
increase in higher pressure and temperature designs are dependent on the
development of newer and newer alloys and tube materials.
Hence, it is evident from the discussions to use 500 / 600 MW subcritical units is
a decision based on techno-economic analysis of the unit sizes. However
keeping in line with the initiative on Climate Changes, the advancements in
technology in recent years, uniformity with other new projects and to derive long
range advantages it may be prudent to establish supercritical units which have
higher efficiencies and more advanced technology and are also well established
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in the market. The nearest market size of a 660 MW supercritical unit is
considered over 500 MW unit proposed earlier.
5.4.5 Operational
All Standard Procedures of Operation (SOPs) and EHS standards/guidelines
(prescribed by UPSPCB/CPCB/MoEF) are being/shall be implemented/followed
during operation of existing and expanded plant.
5.4.6 Environmental Aspects
UPRVUNL is committed to use best technology available for controlling, treating
and disposing of all type of waste to be generated during the operation of
proposed expansion. The details of air emission, waste water and solid wastes
proposed to be generated and their disposal during operation phase are given in
Chapter 2.0. Environment sensitivities present in the study area of 10 km around
the project site are given in Chapter 3.0. The anticipated adverse impacts are
less due to the following:
All recommendation including CREP by CPCB/UPSPCB/MoEF will be
complied;
Expansion based on supercritical technology is envisaged;
Coal proposed to be used shall have sulphur content as 0.4%;
Waste water to be generated will be treated and used within the plant
premises;
Ash to be generated will be disposed off as per best standard practices in
power industry;
Air emission will be controlled by providing ESPs, bag filters and stack of
height 275 m; and
Continuous efforts for improvement of the socio-economic status of the
surrounding area.
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5.5. Conclusion
Based on the above discussion, it is concluded that proposed site is best suited
site for expansion and will contribute to industrial, social and economic
development of the study area and the country in general. The technology
chosen by project proponents is most advanced, state of the art & most
ecofriendly.
Chapter‐6
Environment Monitoring Programme
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6.0 ENVIRONMENT MONITORING PROGRAMME
6.1. Introduction
Environmental monitoring and audits will be carried out during & after the
construction & development phase and during operation phase to check that the
environmental management measures are being satisfactorily implemented and
are delivering the appropriate level of environmental performance.
6.2 Objective of Monitoring
The monitoring of various environmental aspects is necessary because of
following reasons:
To quantify environmental impact
Development of green belt.
Performance evaluation of noise control measures.
Performance evaluation of effluent treatment plant.
To generate data for taking corrective measures.
To check assumptions made with regards to development and detect
deviations to take necessary measures.
6.3 Monitoring schedule during construction phase
The proposed power project envisages setting up of Boilers, turbines cooling
towers and establishment of storage facilities for coal and ash. The construction
activities require clearing of vegetation, mobilisation of construction material and
equipment. The generic environmental monitoring measures that need to be
undertaken during project construction stage are given in Table-6.1.
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Table 6.1
Environment Monitoring Plan during Construction
S.N. Component Parameter Locations Frequency
1. Ambient Air PM10, PM2.5,
SO2, NOX,CO
5-6 Locations at
the boundary of
plant premises
24 hourly samples
twice in a week
2. Waste water pH,TDS,SS,
BOD3,COD,Oil
& grease and
Heavy metals
Drain from
septic tank
Once in a month
3. Noise level Hourly Leq 8-10 Locations
within the plant
premises
Day & Night
measurement twice a
week
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6.3.1 Monitoring schedule during operational phase
The Following routine monitoring programme as detailed in Table-6.2 shall be
implemented at site. Besides to this monitoring, the compliances to all
environmental clearance conditions and regular permits from SPCB/MoEF shall
be monitored and reported periodically.
Table 6.2
Environment Monitoring Plan during Operation
S.N. Component Parameter Locations Frequency
1. Ambient Air PM10,PM2.5,
SO2,NOX,
CO
5-6 Locations at the
boundary of plant
premises
24 hourly samples
twice in a week
2. Fugitive
emission
PM10,PM2.5 5-6 Locations at the
boundary of plant
premises
24 hourly samples
twice in a week
3. Stack PM,SO2,
NOX,CO
All stacks attached to
units where
combustion take place
Once in three
month
PM All stacks attached to
dust generating units
Once in three
month
4. Noise level Hourly Leq At the boundry of the
plant premises and at
1 m distance from
major noise polluting
equipments
Once in a month
5. Waste water As per GSR
422(E) for
inland
surface water
At outlet of STP/ETP Once in three
month
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UPRVUNL will develop in-house monitoring & testing facility to the possible
extent, otherwise, will hire the external agency for the same. Proposed
monitoring and testing will be carried out as per the methods recommended by
CPCB/UPSPCB.
Surveillance of Worker’s Health: UPRVUNL will provide appropriate and
relevant health surveillance to workers with special emphasis to the effect of dust
prior to first exposure and at regular intervals thereafter.
Training: Training activities for employees and visitors will be adequately
monitored and documented (curriculum, duration, and participants). Emergency
exercises including drills will be adequately documented. Service providers and
contractors must be contractually required to submit the adequate training
documentation before start of their assignment
Stack Emission and Ambient Air Quality Monitoring
The following monitoring schedule (Table-6.3) ambient air and stack emissions
will be followed in line with the guidelines of Central Pollution Control Board
(CPCB) for thermal power stations:
Table- 6.3
Monitoring Schedule for Air Pollution in Thermal Power Plant
Capacity (MW) Ambient Air Quality Source Emission Less than 200 2 Stations Once in 4 weeks Greater than & including 200 3 Stations Once in 2 weeks Greater than & including 500 4 Stations Once a week
Monitoring Parameters
The plant being a thermal power project, the ambient air as well as stack
monitoring parameters will be suspended particulate matter, Sulphur Dioxide and
oxides of Nitrogen.
Sampling Stations
As per CPCB guidelines for thermal power stations, minimum four monitoring
stations on grid basis within a radius of 10 Kms will be maintained and operated.
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Around the source to determine general status of ambient air quality. The
ambient air quality stations will be selected on seasonal basis keeping in view the
prevalent wind direction. One station will be located in the upwind direction from
the source so that background level of the various pollutants is known.
Sampling Frequency
The ambient air quality sampling will be done on 24 hours basis, three 8 hourly
samples, for two days continuously and once per week.
All the stacks will be monitored once a week, preferably when the units are
running on full load.
All stack gas emission results shall be normalized to 12 % CO2 in the flue gas.
The various micro meteorological parameters like wind speed, wind direction,
relative humidity and rainfall etc. will also be monitored regularly.
Analysis Methodology
Analysis methodology as described in earlier chapters will be followed.
Monitoring Laboratory
The following equipment will be procured for air quality monitoring by the
environmental cell at Obra TPS, Obra:
Stack Monitoring Kit
Micro-meteorological station
Respirable Dust Sampler
PM 2.5 Sampler
Flue Gas Analyser
Electronic balance
Water Quality
Water quality is to be monitored for assessing its suitability for general plant
uses, potability and effectiveness of the treatment system.
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Water Sources and Parameters to be monitored
The waste water sources and types of samples which are to be monitored, as per
guidelines of CPCB for thermal power stations, regularly are as given in Table-6.4
below.
Table -6.4
Monitoring Schedule for Effluents Generated in Thermal Power Plant
This model is a computer program, based on the Gaussian Plume Modelling
approach, designed to simulate atmospheric dispersion process, in order to
estimate ambient air concentration levels of air pollutants resulting from any set
of gas emission or particulate matter emission sources. The other sources of
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emissions are Dalla Cement factory and fugitive emissions from stone crushers.
Dalla Cement Factory
The model programme used for air quality prediction is US-EPA ISCST3.
Input Data and Model Application
Input data for the model consists of meteorology and emission inventory. The
details of input data for air pollution dispersion modelling are as follows:
Meteorological data
The data recorded at the weather station at OTPS were used for computer
modeling of pollutants concentration prediction.
The predominant wind directions along with wind speed during the study period
is represented as Wind rose (Figure 3.2).
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Emission inventory
The flue gases from proposed units of OTPS & Units under R&M of OTPS were
taken in to account while conducting cumulative impact assessment on ambient
air quality. The emission data of these units was considered for prediction of GLC
and is given in Table 7.2 as below:
Table – 7.2
Emission Inventory for Units under R&M and proposed extension units (2 x 660 MW)
Units Stack
Height
Stack.
Dia
Velocity Temp. SPM SO2 NOX
m m m/s K mg/Nm3 mg/Nm3 mg/Nm3
R & M Obra Units
Unit
No. 7
120.0 14.8 12.6 393 100 709 294
Unit
No. 10
170.0 13.6 12.6 393 100 709 294
Unit
No. 11
170.0 13.6 12.6 393 100 709 294
Proposed 2 X 660 MW Obra
m m m/s K Emission Rate g/sec
Emission Rate g/sec
Emission Rate g/sec
2 x
660
MW
Units
275 8.5 25.0 413 93.81 1775.75 1997.72
Model Application
24-hour, second highest concentration has been computed from the
meteorological data recorded through PCRI Meteorological Station installed at
OTPS for the period 08.03.2013 to 08.06.2013 using the EPA-ISCST3 model.
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Model Output
The results are tabulated in Table 7.3 and the isopleths are shown in Figure –
7.1 to 7.3. The isopleths indicate the 24-hour maximum ground level
concentrations of pollutants due to emissions from the proposed stacks and R &
M stacks as per Table 7.2 of power plant.
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Figure –7.1 SHORT TERM 24 HOURLY GLCs OF SPM
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Figure – 7.2 SHORT TERM 24 HOURLY GLCs OF SO2
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Figure-7.3 SHORT TERM 24 HOURLY GLCs OF NOx
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Table 7.3
24-hour maximum Ground Level Concentrations
Pollutant Maximum Ground Level Concentration
(excluding background)
GLC
(µg/m3)
Distance (Km) & Direction
w.r.t. 2x 660 MW Units Stack
Nitrogen Oxides 39.9 4.0 (SE)
Sulphur Dioxide 47.8 4.0 (SE)
Suspended Particulate Matter 6.7 4.0 (SE)
Assessment of Impact on Ambient Air Quality
Impact on ambient air quality due to the proposed thermal power project has
been assessed by superimposing predicted concentrations on background air
pollution level. Baseline ambient air quality data indicated that the 98th percentile
concentration at Dalla for SPM, NOx, and SO2 was observed 300, 31 and 19
g/m3 respectively and these concentrations have been considered as
background level of pollutants. The air quality Impact is summarized in Table 7.4
below:
Table 7.4
Ambient Air Quality Impact Assessment
(24-hr maximum concentrations)
Pollutant Background
concentration
(µg/m3)
Incremental change
in GLC (24-hr. Max.
Concentration)
excluding
background
(µg/m3)
Maximum GLC
(24-hr. Max.
Concentration)
After
superimposition
on background)
(µg/m3)
Distance
from
2x660 MW
Units
Stack
(Km)
Particulate Matter 300 6.7 306.7 4.0
Sulphur Dioxide 19 47.8 66.8 4.0
Nitrogen Oxides 31 39.9 70.9 4.0
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The maximum incremental concentrations of SPM, SO2 and NOx are expected to
be 6.7 g/m3, 47.8 g/m3 and 39.9 g/m3, respectively. These concentrations are
expected to occur at a distance of 4.0 Km South East with respect to source.
Maximum total concentrations of SPM, SO2 and NOx, after superimposition
of background level would be 306.7 g/m3, 66.8 g/ m3 and 70.9 g/m3
respectively.
The total concentrations are compared with National Ambient Air Quality
Standards prescribed for residential areas as specified under National Ambient
Air Quality Standards as notified by Central Pollution Control Board. It is
concluded that total concentrations of gaseous pollutants would be well
below the allowable limits for residential areas. In case of particulate matter
the incremental change will be insignificant.
Cumulative Impact Assessment w.r.t availability of water:
The water requirement for 2x660 MW proposed TPP is 45 cusecs (110095.9
m3/day). The detail of water use at Obra dam on Rihand River from June 2011 to
May 2012 is given below in Figure 7.4. The total water used in May 2012 is
2010916.13 m3/day. The total water available is 31867316.83 m3/day and after
utilization of proposed power plant water availability is around 31757220.93
m3/day. The availability of water in Obra dam on Rihand River is sufficient to
cater the downstream users. So, it can be concluded that there will be no
considerable impact on source of water to the downstream recipients.
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Figure-7.4 Downstream of Obra Dam
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Figure 7.5 Water use at Obra dam on Rihand River from June 2011 to May 2012
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7.2.3 Implementation of Singrauli Action plan
Observation
It was observed that the project proponent also needs to take into account the
action plan for the critical polluted area formulated by the State Pollution Control
Board and integrate with the project proposal.
Action taken:
Implementation of Singrauli Action Plan, Singrauli Area of Distt. Sonebhadra
(U.P.) Upto 25.10.2012 short term action is given below in Table 7.5:
Table 7.5
Issues Regarding Obra Thermal Power Station
Short term action points
S.No Action Points Compliance status Time target
1. Complete recycle of ash
pond over flow.
The clear time should be
given with date of completion
regarding recycling of Ash
pond overflow under
refurbishment package
Details of plan plan should
be provided.
Construction work of ash water
Recirculation System is almost
complete. Only laying of some
part of 11KV HT line and its
charging remains to be done.
The system is expected to be
operational by Nov 2015.
At present, provisional measures
to check the overflow of ash
slurry and excess discharge
from the power house have
been taken by interconnecting
the ash slurry pipes and
installing extra pumps/stand-by
pumps. The capacity of the
pumps will be suitably
Nov 2015
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augmented during R&M of the
units to prevent the
overflow..The R&M of the said
four units are proposed to be
completed phase wise in
December 2015 to December
2017.
2. Provision of dry ash
collection system.
The R&M work of Unit # 1, 2 & 9
has been completed and their
dry fly ash is being collected in
silos, and from there ash is
being lifted by M/s J.P.
Associates. Part of the ash from
these units in the form of ash
slurry, is disposed into ash pond.
Unit # 10 & 11 are under R&M.
After completion of their R&M,
dry fly ash from these units shall
be collected in silos and same
will be lifted for utilization.
Unit # 12 & 13 are currently
under operation. The ash from
these units is presently being
disposed as ash slurry into the
ash pond through the newly laid
ash pipelines. R&M of Unit #
12&13 will also be carried out
after R&M of Unit # 10&11. After
completion of R&M, dry fly ash
of these units shall be collected
Phase wise from
December 2015
to December
2017 as per
scheduled
provided by
BHEL.
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in silos and same will be lifted by
M/s J.P. Associates.
Thus, the dry fly ash from unit
No. 10, 11, 12 & 13 will also be
collected through the
Silos/DFAES (Dry Fly Ash
Extraction System) constructed
by M/s JP Associates as per
agreement with them for lifting
the dry fly ash from Unit No. 9 to
13.
3. High Oil spillage has been
observed in the drain. Up-
gradation of ETP shall be
completed within 2 years by
Obra TPS.
Construction work of Effluent
Treatment Plant is completed on
17.09.2014.
Complied
4. Use of low sulphur auxiliary
fuel in Obra TPP
Low Sulphur High Speed diesel
is being used as auxiliary fuel at
Obra TPS.
Complied
5. Installation of Opacity meters Opacity meter in unit no. 1, 2 & 9
have been installed after R&M
work.
In the remaining units i.e. in
units no. 10, 11, 12 & 13 of
BTPS the opacity meter will be
installed with their R&M work in
phase manner
Complied
December-2015
to December-
2017 in phased
manner.
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Compliance status of Long term action is given in Table 7.6 as follows:
Table 7.6
ISSUES REGARDING OBRA POWER PLANT
Long term action points
S.No Action points Compliance Status Time target
1. Installation and
renovation of
ESPs to achieve
PM emission of
100 mg/NM3.
ESP in Unit # 1, 2 (each of 50MW) have already
been installed during their R&M work. Unit # 3, 4
& 5 (each of 50MW) have been deleted by CEA.
ESP in Unit # 7 (100MW) is also proposed to be
installed for which DPR has been preapared and
is in process of approval. Unit # 6 (100MW) have
been deleted and Unit # 8 (100MW) is under
process of deletion by CEA.
ESP in Unit # 9 (200MW) has also been installed.
ESP in Unit # 10 & 11 (each of 200MW) will be
installed during their R&M which is under
progress and is scheduled to be completed by
Dec 2015 and Mar 2016 respectively as per
schedule provided by BHEL.
ESP work of Unit 12 & 13 (each of 200MW) is
also proposed to be carried out which is
scheduled to be completed by Dec 2017 and Dec
2017 respectively as per schedule provided by
BHEL. These units will be closed/shutdown for
R&M in next phase.
Unit # 10
dt. Dec 2015
Unit # 11
dt. Mar 2016
Unit # 12
dt. Dec 2017
Unit # 13
dt. Dec 2017
2. Road map for
100% fly ash
utilization by
2014.
The R&M work of Unit # 1, 2 & 9 has been
completed and their dry fly ash is being collected
in silos and from there ash is being lifted by M/s
J.P. Associates.
The dry fly ash from unit No. 10, 11, 12 & 13 will
December-
2017
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also be collected after their R&M through the
Silos/DFAES (Dry Fly Ash Extraction System)
constructed by M/s JP Associates as per
agreement with them for lifting the dry fly ash from
Unit No. 9 to 13. The R&M of these Units will be
completed from December 2015 to December
2017. Besides, Highway Authority/PWD and other
agencies of nearby area has been informed to lift
the pond ash for filling in low lying area as well as
for making Bricks/Tiles etc.
3. Very high fugitive
emission
observed in Obra
TPS.
To control
fugitive
emissions from
ash dyke area,
action plan may
be prepared
including the
possibility of
installation of
high
concentration
slurry disposal
systems.
To control fugitive emissions in coal handling area
sprinklers have been installed from where regular
sprinkling of water is being done. Moreover,
Green belt development has also been start in the
abandoned filled-up ash pond.
March-2018
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7.3 Green Belt Development
Observation:
It was observed that the green belt development in and around the thermal
power station seem dismal and the project proponent seem to have not given
any serious attention in developing the same. The Committee therefore decided
that the project proponent shall submit a detailed action plan along with budget
allocation for development of green belt in a time bound manner and consisting
of an in-built monitoring mechanism.
The Committee also observed that the project proponent shall submit action plan
for ecological restoration of ash dumps for which they may seek the assistance of
Dr. C.R. Babu, Member, EAC and Emeritus Professor, University of Delhi. It was
also observed that the ash pond seem very close to river and overflow from ash
pond during monsoon cannot be ruled out. An action plan for mitigative
measures of occurrence of such a case shall therefore be submitted.
Action taken:
The green belt development shall be carried out through Forest Department. The
detailed proposal for green belt development in abundant ash pond of Obra
Thermal Power project and other area of Power station has been submitted by
Forest department vide their letters dated 26.4.13 & 03.06.2013 are enclosed as
Annexure 11. The same has been approved by UPRVUNL vide OM
No.404/UNL/E&S dated 20.07.2013 and annexed at Annexure-12 and an
amount of Rs.207.893 Lakhs has been released to site for taking up the work.
The details of green belt development is shown on plot plan on annexed at
Annexure-16.The details of green belt development in abundant ash pond of
Obra Thermal Power Project are as given in Table 7.7 as below :
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Table 7.7
Green Belt Development in abundant ash pond of OTPS
S.No. Particulars Details 1 Name of Development Block Chopan 2 Name of Project UPRVUNL Obra – Finance Assitance 3 Executing Agency Forest Department, Obra, 4 Work detail of Project Total Area 146 Ha 5 Time period of Project Three Years (2015 – 16 to 2018 ) 6 Project Cost Rs. 218.283 Lacs 7 As per Govt. order no.A-2-23/10-
2011-17(4)/75 dated 25.01.2011
Add 12.5% additional duty
Rs. 27.285 Lacs
8 Total cost of Project Rs.245.568 Lacs (Rs. Two cores fourty five
lacs fifty six thousands eight hundred only)
The summary of green budget allocation / expenditure is given below in Table
7.8:
Table 7.8
Green belt budget Allocation
S.No. Details of Work Year Budget (Rs.)
in Lacs
1 First Part (Advance Soil WorK) 2015-16 132.147
2 Second Part (Greenbelt Development
work)
2015-16 52.647
3 Third part(First Maintenance) 2016-17 24.199
4 Fourth Part (Second Maintenance) 2017-18 9.290
TOTAL 218.283
As per Govt. order no.A-2-23/10-2011-
17(4)/75 dated 25.01.2011 Add 12.5%
additional duty
27.285
Grand Total 245.568
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Figure 7.6 Green Belt Develop areas at “A”Bund
Figure 7.7 Green Belt Develop areas at “B” Bund
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Figure 7.8 Green Belt Develop areas at “C” Bund
Figure 7.9 Green Belt Develop areas at “D” Bund
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Figure 7.10 Green Belt Develop areas at “D1” Bund
Figure 7.11 Green Belt Develop areas at Way to Ambedakar Stadium
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Figure 7.12 Green Belt Develop areas at Way to Ambedakar Stadium
Figure 7.13 Green Belt Develop areas at Way to Ambedakar Stadium
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The total plan of green belt development will meet the norms as per MoEF
guidelines for development of greenbelt at Thermal Power Station. The same
shall cover ecological restoration of Ash pond also.
7.4 Status of Coal Block
Observation:
The committee also took note of the coal issue and desired that the Ministry
should look into, whether the present proposal conforms to the circulars issued
by the Ministry on 01.11.2010 and 19.04.2012.
Action taken:
Saharpur-Jamarpani Sector, Brahmani Basin, Rajmahal group of Coalfields,
Jharkhand have already been allotted by Ministry of Coal to UPRVUNL for Obra-
‘C’ extension project and MoEF has issued TOR on 31.05.2011 for
Environmental clearance.
7.5 Ash Dyke Breach
Ash pond G is situated by 4.5 km away from Obra TPS having area 72 Ha in
which wet Ash is being disposed. This pond is surrounded by natural all around
hillocks. Only some portion of Ash dam is of earthen embank.
In ash pond area there are three skimmers situated at different locations.
Presently decanted water is discharged through one skimmer without any
overflow. In case of heavy rains during monsoon other two skimmers can be put
in operation & shall start discharging decanted water depending upon the
intensity of rainfall and as such there is no possibility of overflow from the ash
pond in the present scenario. Apart from this that the decanted water from the
ash pond will be recycled to TPP through Ash Water Recirculation System
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(AWRS) which is almost in the completion stage. Ash pond is divided into 3
compartments by natural hillock.
In case Ash dyke breach take place then other compartment shall be used and
breach portion shall be repaired and utilized again.
7.6 Topographical Survey
Topographical survey has been got carried out by UPRVUNL through M/s
ACMETECH, Lucknow. The Topographical details have been shown in the
drawing enclosed with Topographical Survey Report which is attached with the
EIA report. The area has been distributed in 50x50 m grid and contours have
been marked on the drawing.
As per DPR the formation level of proposed project is 200 m above MSL. After
calculating levels of the project site, it was found that the cut-fill/average level of
Obra ‘C’ is 200.080 m which is marginally above the formation level. Therefore,
no filling is required, and hence there is no need of transporting any earth from
outside the plant area.
7.7 Area drainage Study
Area drainage Study has been got conducted by UPRVUNL through M/s
ACMETECH Lucknow. It is evident from the area drainage drawing that there is
only one natural NALA (marked as ‘B’ in the enclosed drawing), which flows
across the proposed project site. During its entire course, the NALA fouls with the
premise of only a single structure at coordinates x=701424.728 and
y=2706258.591. The discharge of the NALA at that location will be taken through
a box culvert of size 5.4 m2 at such that the functioning of the structure is not
affected. Thus, in almost in its entire course the NALA shall flow unhindered/ be
preserved. Detailed report is attached separately.
Chapter‐8
Disaster Management Plan
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8.0 Disaster Management Plan
Disaster is an emergent situation which affects or has the potential to affect
personnel working therein, resulting in extensive damage to the property, loss of
life and disruption of work. Localised accidents, however, are not to be mixed up
with or misunderstood as a disaster. Disaster management is one of the most
important key for the safe operation of power project, more so due to the
complex nature of the operations involved.
At power project, an emergency can take place at any time due to disaster by
nature or by major accident in the site, despite the installation of various
safety devices. The type, causes, phases and categories of disaster are
given below in Table 8.1 :
Table 8.1
Types, Causes, Phases and Categories of Disaster in Thermal Power Plant
Type of Disaster Originating Within Plant
Fire and Explosion
Vapour Cloud
Toxic Gas Release
Natural
Flood/Cyclone
Earthquake
Causes of Disaster In-plant Emergencies due to Deficiencies in
Operation
Maintenance
Design
Human Error
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Natural Calamities
Flood
Cyclone
Earthquake
Deliberate or Other Acts
Sabotage, Riot
War
Terrorist Activities
Air Raids
Phases Warning
Impact Period
Rescue
Relief
Rehabilitation
Categories Self-Contained
Contained by Organisation
Contained with Assistance from
Local Bodies
State Level
National Level
The objective of the industrial disaster management plan is to make use of the
combined resources of the plant and the outside services to achieve the
following:
Initially contain and ultimately bring the situation under control
Minimize damage to property and the environment
Effect the rescue and medical treatment of casualties
Secure the safe rehabilitation of affected areas
Safeguard other people.
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Unlike natural disasters, these can be prevented by proper plan and in case of
accident the effect can be minimised by proper emergency response method. An
important perquisite for disaster planning is that an accident scenario can be
foreseen, which leads to major fire, explosion, toxic release, their spread or
extent and their damage potential.
The development of an effective disaster management plan ensures that
unforeseen identified impacts of the proposed project are minimised. In addition,
it guarantees an effective basis to assess the source and extent of impacts, if
they occur. If the disasters are foreseeable, the efforts to mitigate those
disasters can be planned in advance. With a view to deal with such an unusual
situation the following plan is suggested to be formulated.
Disaster Plan
It is a strategy well evolved, organized and rehearsed to contain the adverse
effects of a possible disaster. It aims to mobilize the internal resources and use
these with minimal dependence on external agencies for the following purposes :
To identify major disasters which may occur in the plant.
To control and contain incidents.
To deal with such emergencies expeditiously.
To safeguard employees and people in the vicinity.
To inform employees, the general public and the authorities about the
hazards/risks assessed safeguards provided, residual risk, if any, and the
role to be played by them in the event of disaster.
To provide rescue relief, assistance to the people affected in the works,
community based on the actual needs and the information collected
locally.
To contain the disaster by isolating the area, firefighting etc.
To prevent recurrence of such a disaster.
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To establish machinery for review, rectification/ modification of the
emergency/disaster plan in the light of actual experience.
To ensure safety of works before personnel re-enter and resume work.
To work out a plan with all provisions to handle disaster and to provide for
emergency preparedness and the periodic rehearsal of the plan.
Seismic Considerations
The power station is located under Zone-II as per IS : 1893 - 1984. Analysis and
design of structures to resist the seismic forces will be carried out as per the
provisions of IS:1893 – 1984.
Fire Protection System
A comprehensive fire detection and protection system is envisaged for the
complete power station. This system shall generally be as per the
recommendations of Tariff Adviser Committee (TAC), India/ IS : 3034 & NFPA –
850 and will provide in-depth capability for early detection, containment and
suppression of fire. The fire protection system for the plant will consist of :
i) Outdoor fire hydrant system
ii) Portable fire Extinguishers
iii) Fire Detection & alarm system for Control Room & Switchgear Room.
Outdoor fire hydrant system
Outdoor fire hydrant system consists of fire water storage, pumping, system
pressurization and all inter connected pipe work and auxiliary firefighting
appliances.
Portable Fire Extinguishers
Portable fire extinguishers are intended as a first line of defense to cope with
fires of limited size. They are needed even though the property is equipped with
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automatic fire suppression systems. Therefore, portable fire extinguishers will be
provided in all plant buildings. Three different kinds of extinguishers i.e. foam,
CO2 1211 and Multi-Purpose Dry Chemical (MPDC) will be provided as per
requirement of NFPA and relevant Indian Standards. Each type of extinguisher
has its own characteristic to fight a particular class of fire as follows :
Type Effectiveness in Fires Fire classification as per NFPA
Foam Flammable liquids, gases etc. B
CO2 Electrical Equipment & Circuitry C
MPDC Ordinary combustibles,
flammable Liquids and
electrical appliances
A, B, C
The size and type of extinguishers will be decided as per recommendations of
NFPA and relevant Indian Standard and will be placed in convenient accessible
locations.
Apart from above broad classifications, the following protection systems are
envisaged at the proposed power project :
a. Hydrant system for complete power plant covering Main Plant Building, Boiler
Area, Turbine and its Auxiliaries, Coal Handling Plant, All Pump Houses and
Miscellaneous buildings of the plant. The system shall be complete with piping,
valves, instrumentation, hoses, nozzles, hose boxes/stations etc.
b. Automatic Foam injection system for fuel oil/storage tanks consisting of foam
Pneumatic conveying system shall be employed for extraction of fly ash from the
electrostatic precipitator hoppers in dry form.
Bottom ashes collected in economizer hopper are/shall be conveyed in wet form
through bottom ash disposal pipes to ash slurry pump. Also for wet
transportation, fly ash generated in dry form is/shall be conveyed through
vacuum to ash collecting tower where it is mixed with water to form slurry which
is collected in ash slurry pump from where it is pumped to ash dyke located in
village Chakari (4.5 km from plant site).
MOU has been signed with M/s Jaiprakash Associates Limited for installation of
dry fly ash extraction system for utilizing fly ash to the tune of 5.528 lacs MT per
annum from the existing units of Obra ‘B’TPS for their cement manufacturing
plant at Dalla in Sonebhadra district and Chunar in Mirzapur district and also
from unit no-1 & 2(2X50MW) of ATPS.
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Existing ash dyke is located in village Chakari (4.5 km from plant site) with
following parameters:
Total Ash Pond Area – Approximately 72.00 ha
The existing ash pond is naturally divided into many parts by the many natural
and elongated earth mounds lying inside the pond which is surrounded by earth
dykes / embankments. The dykes / embankments will be raised for disposal of
ash slurry from the proposed 2x660MW new units also. Efforts will be made to
evacuate the naturally divided ponds by allowing the needy agency to lift the
pond ash to make them ready in turns for lining purposes. Suitable LLDPE liner
will be provided on the bottom of the pond and sides of the raised bund so as to
ensure impermeability of the ash pond. A typical cross-section of the dyke
showing provision of LLDPE liner is shown hereunder:
Bottom ash which will be around 20% of total ash generated, will be disposed off
in slurry form in the existing ash dyke. However, as per guidelines of MOEF a
comprehensive plan has been drawn for utilization of 100% ash utillisation for
Obra TPS.
Cross section of Ash Pond Lining Details
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10.8 Socio - Economic Environment
It is envisaged that setting up and expansion of thermal power plant would lead
to certain impacts on socio-economic environment. The opportunities for direct
and indirect employment will increase. It may lead to industrialization of area.
The demographic pattern of the area may change to some extent. It needs a
well-designed Environmental Management Plan for the related problems of coal
dust in the atmosphere, effluent discharge, if any, ash disposal are very critical
with reference to environment pollution. Since these pollution problems, if not
tackled properly, may lead to various health complications as well as discomfort
to aesthetic attributes, socio-economic environment assumes a very significant
position in the EIA studies related to such project. The following measures will be
taken for an effective Environment Management Plan leading to achieving
desired benefits without any adverse impacts:
Employment to local population at least in unskilled category.
The main immediate expectation from any new thermal power
plant is improvement in supply of electricity. The area which are
very near to power plant and have irregular and low voltage power
supply will be identified and these areas will be considered to
provide electricity on priority basis. This would also lead to good
will for the power plant management.
Welfare activities for nearby rural areas will be strengthened.
Power plant may adopt one or two villages in the area and may
develop them as model village.
The black smoke coming out of power plant stack certainly
adversely affects the aesthetics of the area. It will be ensured that
pollution control equipment installed at the power plant are always
working in proper condition.
Trees will be planted along road sides in such a way that there is
no direct line of sight to the installation when viewed from a point
outside the foliage perimeter.
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Proper use of modern technologies involving reuse of fly ash
leading to economic benefits as well as prevention of pollution will
be adopted.
The possibilities of providing subsidies or equity participation for
fly ash bricks plants will be explored. The use of fly ash bricks in
the nearby areas will be encouraged. The advantages of fly ash
bricks, particularly in reference to soil conservation in the area
should be explained to local population.
Awareness programs on environmental aspect and operation of
thermal power plant will be organised for local population. This will
remove many of the apprehensions from their minds.
10.9 Rain Water Harvesting
Rainwater harvesting at Obra Power Project site shall be carried out, if required, so
as to conserve rainwater and reduce the overall water consumption for plant
requirements
The convenient and economical way of achieving the same is by adopting roof water
harvesting methodologies. Rain water harvesting supplements in meeting various
non-potable purpose of water usage in the power plant like:
Water for gardening purposes
Water for sprinklers that are used on coal
For use in flushing of toilets
The above components of non - potable use for which water is otherwise to be
supplied from raw reservoir could therefore be saved.
Components of the Rain Water Harvesting Scheme
a. Rainwater harvesting to enrich the groundwater resources.
b. Rainwater harvesting scheme intended for roof water harvesting scheme. In
either case, following will be the components of the rainwater harvesting
schemes.
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Rainwater harvesting carried out for enriching the groundwater resources
essentially consists of:
i. Recharging pits
ii. Common underground sump
iii. Pipeline(s) connecting each of the recharge pits
Following are the main components proposed for the roof water harvesting system at
the thermal power plant including their location in the project area:
a. Rainwater pipes from the roofs of all the station Building, and other non - plant
building in the vicinity viz. Workshop, Service building, DM plant/Chemical
house, Fire station building, Canteen etc.
b. Storm water drains adjoining the roads of cooling Towers, ESP/ Boiler areas of
the plant
c. Rain water collection tank (underground)
d. Pipelines from the rainwater collection tank to the overhead tank and from the
tank to various utilities
The exact location of these components including of details of components like
pumping main and synthetic tanks could be finalised after identifying the exact
location of the storm water out fall that shall be collected in the proposed
rainwater collection tank. All storm water drains of the main plant area shall be
connected the rainwater collection tank
Integration with Storm Water Drains
The roof water of the station buildings such as Fire station, Canteen, Workshop
building, etc. shall be collected in the proposed rainwater collection tank. All
storm water drains of the main plant area shall be connected to the rainwater
collection tank.
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Storm water from drains and rainwater collected in the rainwater tank shall be
utilized for further use. This is achieved by installing a suitable pump at one end
of the tank. This shall pump the collected water to the synthetic PVC tank
installed on the roof of superstructures like Station Building, etc. The size of the
synthetic tank shall be suitable sized based on the rainfall intensity and the run
off thereof. Additional tank could be installed as and intensity and the run off
thereof. Additional tank could be installed as and when the underground tanks
are added. PVC pipe is proposed for pumping water from the rainwater collection
tank to the tanks on top of the buildings.
Collected water from the synthetic tank is distributed by gravity through PVC
pipes of 100 mm diameter to desired locations for non-potable use as explained
earlier.
Furthermore, most of the junctions (similar to manholes of closed conduit system
drains), namely chambers can be made deep enough to allow water to collect
and enrich the groundwater source in the storm water drainage network of the
main power plant. The dimensions of such chambers including its depth shall be
decided at the time of detailed design.
However, Director Underground Water Department, Lucknow has informed that
rainwater harvesting is not required in the Chopan Block of Distt Sonebhadra
where the proposed project is situated. Refer to Annexure-17
10.10 Green Belt Development
Strengthening of existing green belt in and around Obra TPS will be done by
planting local species of trees. Steps have already been taken by the TPS
authorities in this direction. An area of around 140 Hectare has been earmarked
for the green belt development viz. along the boundary of the proposed project
area, abandoned ash pond and some pockets.
The green belt development shall be carried out through Forest Department. The
detailed proposal for green belt development in abandoned ash pond of Obra
Thermal Power project and other area of Power station has been submitted by
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Forest department vide their letters dated 26.4.13 & 03.06.2013 are enclosed as
Annexure 11. The same has been approved by UPRVUNL vide OM
No.404/UNL/E&S dated 20.07.2013 and annexed at Annexure-12 and amount
of Rs.207.893 Lakhs has been released to site for taking the work. The details of
green belt development is shown on plot plan on annexed at Annexure-13.The
details of green belt development in abundant ash pond of Obra Thermal Power
Project are as given in Table 10.3 below :
Table 10.3
Green belt budget Allocation
S.
No.
Details of Work Year Budget (Rs.)
in Lacs
1 First Part (Advance Soil Work) 2015-16 132.147
2 Second Part (Greenbelt Development
work)
2015-16 52.647
3 Third part (First Maintenance) 2016-17 24.199
4 Fourth Part (Second Maintenance) 2017-18 9.290
Total 218.283
As per Govt. order no.A-2-23/10-2011-
17(4)/75 dated 25.01.2011 Add 12.5%
additional duty
27.285
Grand Total 245.568
The total plan of green belt development will meet the norms as per MoEF
guidelines for development of greenbelt at Thermal Power Station. The same
shall cover ecological restoration of Ash pond also.
The main tree species to be planted and minimum height of plants at the time of
plantation is given in Table 10.4 bellow:
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Table 10.4
The main tree species to be planted
S.NO Species Minimum height of Plants at Plantation stage
Block Belt Urban
1 Shisham 1.0 1.5 1.5
2 Siras 1.0 1.5 1.5
3 Mango 1.0 1.5 1.5
4 Jamun 1.0 1.5 1.5
5 Arjun 1.0 1.5 1.5
6 Kanji 0.6 1.5 1.5
7 Gulmohar - 1.5 1.5
8 Jackrenda - 1.5 1.5
9 Kachnar - 0.6 0.6
10 Amaltash - 0.6 0.6
11 Savni - 0.6 0.6
12 Botteltree - 0.7 0.7
13 Platoforam - 0.6 0.6
14 Pipal 1.0 1.5 1.5
15 Pakad 1.0 1.5 1.5
16 Bargad 1.0 1.5 1.5
17 Gular 1.0 1.5 1.5
18 Prosopira 0.45 - -
19 Jungle Jlaebi 0.45 - -
20 Sagon 0.40 - -
21 Euclyptus 0.6 1.0 -
22 Popular 2.0 - -
23 Kher 0.35 - -
24 Babool 0.45 - -
25 Neem 1.0 1.5 1.5
26 Bamboo 0.40 - -
27 Kadam - 1.5 1.5
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The plantation success percentage is given in Table 10.5 is below :
Table 10.5
The plantation success percentage
Year Western Ganges
Area
Eastern Ganges
Area
Tarai Area Vindhyachal &
Bundelkhand Area
Non
damaged
10%
damaged
Non
damaged
10%
damag
ed
Non
damag
ed
10%
damag
ed
Non
damaged
10%
damaged
0 95 95 95 95 95 95 95 95
1 79 88 90 99 91 100 75 84
2 68 75 83 91 83 91 69 77
3 59 65 76 83 75 82 64 71
4 51 56 70 76 68 74 60 66
5 46 50 65 70 60 65 56 61
6 42 45 61 65 53 57 53 57
7 40 42 57 60 46 49 50 53
8 40 42 54 56 40 42 49 51
9 40 42 52 53 34 35 47 48
10 40 42 51 52 28 29 47 48
The Sonebhadra, Mirzapur & Varanasi area comes in the Vindhyachal and
Bundelkhand Agricultural Area.
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10.11 CLEAN DEVELOPMENT MECHANISM (CDM)
Sustainable power generation has been one of the prime objectives of
UPRVUNL. Towards achieving this objective, various measures have been
introduced to ensure minimum degradation of the environment due to the
operation of the power stations. There is growing concern world over and
UPRVUNL is no exception towards contribution of green house gases released
due to fossil fuel firing towards global warming. As a part of the agreement under
Kyoto Protocol the CDM has been introduced to enable trading of Certified
Emission Reduction (CER) between the developed countries and the developing
countries. Although, this issue is being exhaustively deliberated to establish long
ranging solutions, accordingly, it is proposed to have supercritical boilers at the
Obra-C as extension project in place of earlier proposed 2X500 MW. In view of
the increased efficiency (2.4%) of super-critical boiler as compared to sub-critical
boiler, the coal consumption per unit of electricity generation would be lower with
consequent reduction in CO2 emissions. The reduction in CO2 emissions would
be of the order of 0.26 million tons per year. For the entire life of the plant (i.e. 25
years), it would be of the order of about 6.5 million tons. Since the super-critical
technology is still under implementation stage in India, operation of super-critical
boilers using the low grade Indian coal is challenging and technology barriers will
have to be overcome. Investment costs for plant with super-critical boilers is
higher as compared to the plant with sub-critical boilers. As such, Obra-C Project
is likely to fulfill the requirements of the CDM additionality.
10.12 ENVIRONMENTAL COST
A cost provision of approximately Rs.634.347 crore has been kept towards
providing environmental measures.
Chapter‐11
Public Consultation
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11. PUBLIC CONSULTATION
Public participation in EIA has a critical role to play in helping to integrate
economic, social and environmental objectives. Public participation is
necessary for minimizing or avoiding public controversy, confrontation &
delay and can make a positive contribution to the EIA process.
Involvement of the public is one of the fundamental principles of a successful
EIA process. It not only provides an opportunity to those directly affected by a
project to express their views on the environmental and social impacts of the
proposal but also brings about transparency in the environmental clearance
system. Nearly all EIA systems make some sort of provision for public
involvement.
As per EIA Notification, 2006; Public Consultation is the process by which the
concerns of local affected persons and others who have plausible stack in the
environmental impacts of the project or activity are ascertained with a view to
taking into account all the material concerns in the project or activity designed
as appropriate.
In line with EIA Notification, 2006; EIA report has been finalized based on
TOR issued by Ministry of Environment & Forests, New Delhi. This EIA
Report along with Executive Summary in Hindi & English and in soft form
(CD) was submitted by Uttar Pradesh Rajya Vidyut Utpadan Nigam Limited to
U.P. Pollution Control Board for arranging Public Hearing.
Executive Summary in Hindi & English was hoisted on web – site of U.P.
Pollution Control Board for inviting comments of the public. Also notice of
Public Hearing was published in Local News Paper – Dainik Jagran, Varanasi
edition dated 12.09.2014 (Copy of Newspaper cutting enclosed at Annexure-
19).
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In line with public notice, public hearing was organised at Collectorate
Auditorium, Sonebhadra on 17.10.2014 from 01.00 PM. The Public Hearing
was attended by the villagers from nearby villages. The attendance list of the
public present in Public Hearing is enclosed at Annexure- 21.
This public hearing was organised under supervision and chairmanship of
Shri Mani Lal Yadav, ADM (Administration) – Sonebhadra. During the public
hearing officials of Uttar Pradesh Rajya Vidyut Utpadan Nigam Limited and
PCRI made presentation on salient project features and environmental
aspects to the public. The main issues of the public during the Public Hearing
were as follows:
33 % of area for Green Belt Development
Installation of High efficiency Electro Static Precipitators to limit
SPM with 100 mg/Nm3.
Installation of 275 m high stack for better dispersion of pollutants
Appropriate arrangement for pollution control at Coal Handling Plant
Sprinklers be provided at Ash Pond to prevent fugitive dust
emissions
Effluent recycling be practiced. No effluent be discharged in Rihand
river and its tributaries.
Effluent Treatment and Sewage Treatment Plants be installed.
Treated water be used for Green Belt Development.
Effective measures be taken to control Noise Pollution.
Uttar Pradesh Rajya Vidyut Utpadan Nigam Limited assured the public to
consider the public opinions and take care of these issues appropriately. In
the last, the public welcomed the project and accorded its consent through
voice vote. The minutes of the meeting of the Public Hearing issued by U.P.
Pollution Control Board is enclosed in Annexure - 20.
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11.1 Public Hearing Points raised during Public Hearing
Public hearing was done on date 17.10.2014 in the presence of Sri Kalika Singh,
RO/Sonebhadra, Sri Mani Lal Yadav, ADM (F/R) Sonebhadra, Sri Sanjay Tiwari
CGM/OTPS and other project officers & the public.
S.N. Issue raised Issue raised by Reply/Action taken so far
1. Pollution is generated by the industries. Management is not making enough efforts to control the pollution. Ground water is contaminated with Fluoride, Arsenic etc. The emission from chimney damaged the agriculture and Industry. Proposed project may be accorded conditional NOC. The district should be awarded 100MW Electricity free of cost.
Sri Chaudhari Yasvant Singh of NGO- Jan Sevak Gramodyog Sewa Sansthan, Robertsganj)
S.E. (HQ) of OTPS said that due attention shall be paid to various suggestions made in this public hearing. Education facilities shall be provided to children of local area; medical facilities shall be provided at nominal charges; Employment shall be provided to local residents through contractors directly as well as indirectly; Obra TPS is contributing to the welfare of local public of nearby villages through various CSR activities and in future, the scope of CSR shall be further increased; There is problem of pollution; we are not acquiring any additional land; we shall fulfil all the norms regarding pollution.
2 Ash is being disposed in to the river through Jhariya Nala
Sri Sangram Misra (Ex. Distt. President, Hindu Yuva Vahini), Sonebhadra
Sri Sanjay Tiwari, CGM, Obra thanked the participants of public hearing and intimated that this project shall be installed on the 550 acre land and shall be contributing towards employment directly as well as indirectly. CGM also intimated that in compliance with orders of National Green Tribunal, Obra project has installed 7 nos. RO plants of capacity 1000 lt/hr at various places under CSR. Project shall spend in various welfare scheme about 32 crore under CSR. CGM intimated that unit no. -9 had already been renovated and is operation &
3 Medicines are not provided by the project to the poor tribal of this area. Coal supply is inadequate. Poverty is rampant is the district and the youth is unemployed. Proper shelters & residences may be provided to the poor living in the area of Obra- C project.
Sri Vipin Singh, Corporator, Obra
4 The distt. is predominantly, 80% populated by tribal. The electricity project is welcome but the tribal should be given
Sri Ramesh Singh Yadav, Social activist , Obra, Sonebhadra
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priority & they should be given employment. Pollution should be minimised & employment should be maximised. 105MW Electricity May be provided to the distt. so as to make it available 24 hrs. Electricity supply to distt. Sonebhadra.
95% PLF as regards making available fee electricity in 5 km periphery this is a central govt. scheme and the day the state govt. will adopted we shall also taking necessary action. Sri Manni Lal Yadav, ADM(F), Sonebhadra in his concluding presidential address assured the public that the arguments expressed by public shall be conveyed to Central Govt. and no environment imbalance shall be allowed to be created at any cost. He also said that all measures shall be taken to keep environmental pollution within the norms. He also insisted that UPRVUNL should pay special attention for all round development of the area. Besides, above suggestion / comments and observations, no other issue has been raised during public hearing. The public present in the public hearing expressed its consent for extension of the project unanimously. Dredging of deposited ash in the river Renuka has been got done through Irrigation Department. Plantation /afforestation is being got done through Forest Department, UP over the vast area of filled and abandoned ash pond. This will significantly help in improving the environs. Medical camps have been organised for eyes and other medical check-ups of the nearby denizens. 7 nos. RO plants of capacity 1000 lt/hr have been installed by Obra Project at various places under CSR in compliance with
5 Pollution & disease prevails in this area in the name of development. Compensation, education & employment may be provided to already displace d people of this area. 25% electricity is provided from the plants established in other provinces. Public demand may be considered.
Sri Rambhrose Singh, Worker-Jantadal, Robersganj
6 Expansion of industries attract the attention towards pollution. Obra & Anpara generate so much smoke which is a matter of shame. There is no proper arrangement for water storage.
Sri Shaikh Kaleem, president All Nature Climate Environmental Society, Churk, Sonebhadra
7 People of Obra have long been waiting for obra C project, & this project will prove to be a milestone. The project is very old & sick and is under treatment. The units causing pollution are being renovated. The denizens shall get employment
Sri Vishal Gupta, Zone chairperson, lions club, Obra
8 We have gathered here in a public court and had been waiting for quite a long time. The central govt. as well as State govt. have taken commendable steps. The education & medical facilities
Sri Alok Bhatia, Distt. Vice President, Vyapar Mandal, Obra
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are good. The process of providing employment to the use of this area should be simplified .
orders of National Green Tribunal. New ESPs will be installed in old units of 200 MW capacity each which are undergoing R&M to ensure emission within prescribed environmental standards of smoke emission.
9 The distt. is facing naxal & poverty. The establishment of power project is a definite welcome but the poor is meted step-motherly treatment. Minimum wages are not provided. The religious place of Bhutesvar Darbar, natural Shiv Mandir are located in sector-3, and thus is a natural heritage & it should be preserved. The youths of Obra should be provided 100% employment. A movement will be started if 24hrs electricity Supply is not provided.
Sri Dinesh Shukla, Bharti Janta Yuva Morcha, Kashi Prant
10 The establishment of the power project, & development is the area is well come. How will the electricity supply in the entire distt. be provided if the project is not available to provide electricity. To the nearby area within even 100 mtrs. Where shall be slum dwellers be sifted . Rs. 500 is charged as medical fee from private people which is not appropriate. Thousand of trees have been felled. Trees should be planted otherwise the project will not be allowed to be constructed.
Sri Vikas Singh(Chinku) Student leader, Obra
11 UP Govt. have them appreciated this job and we agree for this project. Sinduria & Vardia are dark areas which should be adopted, & the village should
Ajay Kumar Pathak, Student PG college, Obra
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be designated for this purpose. Support NOC for same.
12 We express thanks The UP Govt. & hor. CM of UP. Electy. Generation is very important and we support the construction of Obra C Project.
Sri Vijay Yadav, Distt. President, Samajwadi Yuvjan Sabha, Obra
13 The construction of project is welcome and NOC should be granted for same. However employment should be made available.
Sri Mithlesh Singh Bajarangi, Obra
14 The facility of electy. Must be ensure within 5 km, and the hospital should be properly manage, employment should be made available to the youths. NOC be granted for Obra C project.
Sri Neeraj Bhatia, Ex. Students Union, Obra
15 It is appreciated if employment is made available. We will required 24hrs. Electy. Supply.
Sri Pawan Kumar Yadav, Obra.
Chapter‐12
Summary & Conclusion
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12.0 SUMMARY & CONCLUSION
Energy is a critical success factor in the economic development process and major
infrastructure requirement for any country. It is well known that our commitment for
the cause of development require assured supply of affordable and reliable energy.
The demand for energy has grown rapidly with the development of society.
Quality power at optimum cost is a catalyst for industrial development of any State.
The State of Uttar Pradesh has ambitious plans for rapid industrialization. Therefore
power generation in the State of Uttar Pradesh requires urgent augmentation of
generation capacity.
The present installed capacity in the state of U.P is insufficient to meet the demand
for power. It is estimated that Peak Electric Load in U.P. will rise from current level of
19622.53 MW and Electrical Energy Requirement will be 110664.947 GWh by 2016-
17 as per 17th Power Survey. As there is an acute shortage of power in Uttar
Pradesh and this has become the main hindrance in the development of industries
and the State, installation of more thermal power plant on urgent basis in this State
becomes important.
The proposed project is one of the projects planned to be developed for long term
capacity addition project. The proposed project will help in bridging the gap between
supply and demand of power in the State of U.P. and Northern region.
The proposed expansion of 2 x 660 MW Obra ‘C” coal based thermal power plant will
be located In the Obra Thermal Power Station premises. No additional land will be
acquired for this project.
Obra-’C‘ (2x660 MW) is being proposed as an expansion project of the existing Obra
power plant and is envisaged to start generating power during 13th Plan period
between (2017-2022). The entire generation is to be utilized to meet the power
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requirement of Uttar Pradesh and the surplus power, if any would be pumped into
Northern Grid to meet the power requirement of other states in northern region.
The water for the proposed project will be made available from Obra Dam on the
river Rihand. 54 cusec water will be used from Obra Dam. Sufficient quantity of water
available for the competent users.
The proposed expansion is planned within the premises of existing plant and no
additional land is proposed to be acquired. UPRVUNL has identified about 550 acres
of land, at the existing Obra TPS for installation of this expansion project after
demolishing the existing old and dilapidated quarters in sectors 5,6 and 7 of present
colony and adjoining land towards north of sector 6 and abandoned ash dyke.
Vicinity cum plot plan and Layout plan of the expansion units is enclosed as
Annexure- 15.
Coal requirement for proposed 2x660 MW units is estimated as 5.528 million
tonnes/annum, considering GCV of 4000 kcal/kg, design heat rate as 2250 Kcal/kWh
and 85% PLF as per CERC operative norms effective from 1/4/2009.
Coal requirement for 2x660 MW will be 5.528 MTPA. Coal will be obtained from
Saharpur-Jamarpani Sector, Brahmani Basin, Rajmahal group of Coalfields,
Jharkhand coal Block, which has been allocated. Ash and sulphur contents in coal
will be 32% and 0.4% respectively. About 1.415168 MTPA of flyash and 0.353792
MTPA of bottom ash will be generated. Agreement for flyash utilization has been
signed with M/s Jaiprakash Associates Limited.
Thermal power plants invariably have potential environmental effects during both
the construction and operational phases including effects on air, water, noise & land
environments as well as socioeconomic conditions during construction phase. The
significance of construction impacts will be limited; however the mitigation measures
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will be taken for traffic management, appropriate timing and routing of materials,
delivery, maintenance of sanitary facilities etc.
In addition to the above, the potential for environmental impacts is also associated
with the operation of thermal power stations. The environmental effects on air quality
will be minimized through implementation of mitigation measures viz. installation of
high efficiency (99.80%) ESPs for collection of fly ash from the boilers, ESP
designed for 50 mg/Nm3 in operation and installation of tall stacks of 275 meters for
better dispersion of gaseous pollutants. It would be ensured that the emission norms
prescribed by regulatory bodies are met during operation of the power plant.
The effluent generated during operational phase will be treated to meet the
permissible norms and will be utilized for green belt development. The fly ash and
bottom ash from the plant is proposed to be collected and used for various
applications. UPRVUNL will also explore various other avenues for utilisation of ash
in value added products such as cement, fly ash bricks etc.
In order to provide quality dry fly ash to users such as, manufacturers of cement,
concrete and its allied products like Cellular Concrete etc., the plant shall provide
systems and facilities for 100% extraction of dry fly ash.
The assessment indicates that with the adoption of the mitigation measures
established by the Environment Impact assessment process, the overall
environmental impacts of construction and operation of the proposed project, there
will be Impact on environment but not injurious in general. However, mitigation
measures are important during the construction as well as operation stage of
Proposed Thermal Power project. The changes in air, water quality with the
introduction of proposed mitigation measures would ensure compliance with
appropriate standards and confine negative effects within acceptable limits. No
appreciable operational impacts are expected in relation to factors such as visual
amenity and ecology.
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The green belt development plan envisaged in and power plant will improve the
surrounding environment.
On the whole it can be concluded that installation of 2 x 660 MW Obra ‘C’ Coal
Fired Thermal Power Project at Obra Thermal Power project, District
Sonebhadra (U.P.) will be an environment friendly project.
Chapter‐13
Disclosure of Consultants Engaged
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13. DISCLOSURE OF CONSULTANTS ENGAGED (REVIEWER & UPDATER) 13.1. Team Composition The team composition and their respective responsibilities are listed in Table 12.1
Quality Control Sheet
Project
Revision No. Date
EIA Studies of UPRVUNL 2x660 MW Obra ‘C’
Project, Obra, District Sonebhadra (U.P.)
0 July 2013
Project Leader R.S.Yadav
Signature:
Project Reviewer Arjesh Sharma
Signature
Project Co-ordinator
Ambrish Goel
Signature:
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PROJECT PERSONNEL
Scientific Staff
Mr. Manish Sachan
Dr. S. Bhatnagar
Dr. N.G. Shrivastava
Mr. P.K. Biswas
Project Staff
Mr. Virendra Kumar Mr. C.P.S.Khosla
Mr. Vipin Kumar Mr. Satya Pal
Mr. Navneet Chauhan Mr. P.K.Pahwa
Mr. A.K.P.N.Singh Mr. Pradeep Kumar
Mr. K.S.Gusain Mr. Alok Srivastava
Secretarial Assistance
Mrs. Rekha Mr. Prem Singh
Mr. Rati Ram Mr. Sagar Kumar
Mr. Bir Singh
Project Leader
Rajendra Singh Yadav
Project Reviewer
Arjesh Sharma
Project Co-ordinator
Ambrish Goel
Annexures
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TOR Annexure-1
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Change in unit Configuration Annexure-2-
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Water allocation Annexure-3
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Coal Linkage Annexure-4
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Minutes of Meeting Annexure-5
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MoEF Letter Annexure-6
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Water Balance Diagram Annexure-7-
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Ash Utilisation plan Annexure-8
Ash Utilisation Plan for OBRA TPS Year Ash Generation