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Draft EIA report for Narmada Thermal Power Limited 5-1 Chapter-5 Environmental Management Plan 5.0 INTRODUCTION An environmental management plan (EMP) is a management framework for reducing environmental impacts and improving organizational performance. EMP provide organizations, a structured approach for managing environmental and regulatory responsibilities to improve overall environmental performance, including areas not subject to regulation such as unregulated risk, resource conservation, and energy efficiency etc. The project details provided by proponent and the pre-project (baseline) environmental status monitored through field surveys by M/s Detox Corporation Ltd. team during summer season (March to May 2011) were the basis to evaluate the impacts on all individual components of environment due to the proposed project activities. In view of the above, project proponent shall maintain the specifications/details/data as provided for preparation of this report or may try to improve further towards betterment of environmental protection during various phases of implementation of proposed project. Proposed development consists of land procurement, construction phase and operation phases. The environmental management plan relevant to these phases is delineated in the following sections: 5.1 CONSTRUCTION PHASE The construction phase impacts would be mainly due to civil works such as site preparation comprising heavy earthmoving, site grading, RCC foundations; construction material and machinery transportation, fabrication and erection etc.. The construction phase impacts will be temporary and localized phenomenon except the change in the land use pattern. The environment management to be implemented during the construction phase is as delineated below: The top layer soil which is excavated during site leveling shall be sold to contractor or shall be disposed off in the low lying area instead of accumulating the same on the road or the premises area. Temporary huts of the construction labours shall be arranged within the project boundary. The site grading, partial level rising as required at project site shall be planned keeping in view the natural drainage around the project site.

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Draft EIA report for Narmada Thermal Power Limited 5-1

Chapter-5 Environmental Management Plan

5.0 INTRODUCTION

An environmental management plan (EMP) is a management framework for reducing

environmental impacts and improving organizational performance. EMP provide

organizations, a structured approach for managing environmental and regulatory

responsibilities to improve overall environmental performance, including areas not

subject to regulation such as unregulated risk, resource conservation, and energy

efficiency etc.

The project details provided by proponent and the pre-project (baseline) environmental

status monitored through field surveys by M/s Detox Corporation Ltd. team during

summer season (March to May 2011) were the basis to evaluate the impacts on all

individual components of environment due to the proposed project activities.

In view of the above, project proponent shall maintain the specifications/details/data as

provided for preparation of this report or may try to improve further towards betterment

of environmental protection during various phases of implementation of proposed

project. Proposed development consists of land procurement, construction phase and

operation phases. The environmental management plan relevant to these phases is

delineated in the following sections:

5.1 CONSTRUCTION PHASE

The construction phase impacts would be mainly due to civil works such as site

preparation comprising heavy earthmoving, site grading, RCC foundations; construction

material and machinery transportation, fabrication and erection etc..

The construction phase impacts will be temporary and localized phenomenon except the

change in the land use pattern. The environment management to be implemented during

the construction phase is as delineated below:

The top layer soil which is excavated during site leveling shall be sold to contractor or

shall be disposed off in the low lying area instead of accumulating the same on the road

or the premises area.

Temporary huts of the construction labours shall be arranged within the project

boundary.

The site grading, partial level rising as required at project site shall be planned

keeping in view the natural drainage around the project site.

Draft EIA report for Narmada Thermal Power Limited 5-2

The vehicles used for transportation of construction material shall be certified within

valid PUC.

The trucks carrying cement and sand should be covered in order to prevent the

fugitive emissions due to material handling.

Temporary shed shall be developed in order to store the construction material inside

the project premises.

The machinery used for construction purpose shall be properly maintained and

serviced.

It should be ensured that diesel powered vehicles and construction machinery are

properly maintained to minimize the exhaust emissions as well as noise generation

The construction debris generated shall be properly stored in the shed and later

should be used for leveling of low lying area and road construction.

Regular water sprinkling shall be done in the storage area and within the plant

boundary for dust suppression.

Though the effect of noise on the nearby inhabitants due to construction activity will

be insignificant as per the proposed plot plan, noise prone activities should be

restricted to the extent possible during day time in order to have minimum noise

impact during night time.

Onsite workers should be strictly instructed to use noise protection devices like

earmuffs in noise prone area.

Hazardous materials such as lubricating oil, compressed gases, paints and varnishes

are required during construction phase which should be stored properly as per the

safety regulations at isolated places.

Accidental spillages of oil from construction equipment and storage sites should be

prevented.

The fuel used for the machines should be of good quality.

Proper arrangement shall be made to prevent to washout of construction material

during the monsoon season. Temporary shed of brick should be constructed during

the monsoon season for the storage of construction material.

Proper storm water management system shall be integrated in design phase and

civil works shall be carried out accordingly at project site.

Once the construction phase is completed, proper clean up of the plant area shall be

done and the construction debris and the other waste shall be disposed off at the

low lying areas.

Draft EIA report for Narmada Thermal Power Limited 5-3

5.2 OPERATION PHASE

Based on the impacts discussed in the chapter-4 due to the upcoming power plant

project on the air environment, water environment, land environment, noise

environment, Biodiversity and socio economic environment a detailed environment

management plan is proposed in order to mitigate the impacts identified.

The various types of pollution from the power plant are categorized under the following

types:

• Air pollution.

• Water pollution.

• Solid waste/ hazardous waste generation

• Noise pollution.

• Bio ecological environment / Green belt

The various proposed pollution control systems are described in the following sections.

5.3 AIR ENVIRONMENT

In order to control the flue gas emission two stack each with height of 130 m has been

envisaged with boiler at the site. This height of the stack will be adequate for the proper

dispersion of the pollutant.

The stack height for the proposed boiler was decided based on the below mentioned

formula.

H=14 Q 0.3 Where Q is SO2 emission in kg/hr.

As per the emission details calculated on the basis of gas composition, SO2 content in

exhaust was calculated.

Sulphur content in coal is considered as 1 %.

Accordingly SO2 emission is 866.5 kg/hr

Stack height required = 14 * Q 0.3 Where Q is SO2 emission rate in kg/hr

Total Stack height required = 106.52 m

Stack height provided = 130 m

Hence the stack height provided for the boiler is adequate

High efficiency Electrostatic Precipitators (ESP) having efficiency not less than 99.8% will

be installed for each boiler to control the emission of particles in fly ash. The ESP will be

designed to limit the particulate emission to 50 mg/Nm3 as per prevailing CPCB

Draft EIA report for Narmada Thermal Power Limited 5-4

standards. / SPCB Standards. To facilitate wider dispersion of pollutants one chimney will

be provided for each unit and sampling port(s) will be provided for continuous online

monitoring. Access doors will also be provided for facilitating inspection. The technical

detail of ESP is given in chapter 2, section 2.8.2, page no. 2-15.

Dust Extraction & Dust Suppression systems will be provided in Coal & Ash handling

systems.

5.3.1 Control of Fugitive Emissions

Following area/ operation has been identified from which fugitive emission may occur.

i) Loading/ Unloading of coal at port and project site.

ii) Transportation from port to plant

iii) Stacking of coal/ Coal storage area.

iv) Transfer of coal from storage yard to screening, crusher house and coal storage bin.

v) Fugitive emission from fly ash storage area.

5.3.1.1 Coal handling

Detail coal handling system is discussed in chapter 2, section 2.3.2, page 2-2.

Following environment management system will be adopted to control fugitive

emissions.

i) Unloading of coal by dumpers will be carried out with proper care avoiding dropping

of the materials from height. Also the material will be moist by sprinkling water while

unloading at the project site as well as the port.

ii) Transportation of coal from port to plant shall be done by dumpers. In case of non

availability of dumpers the same shall be done in trucks covered with tarpaulin

sheets. The coal shall be moist in order to prevent the fugitive emissions during

transportation.

iii) Due to the blowing wind there shall be fugitive emissions in the coal storage area.

The same shall be prevented by regular water sprinkling in the storage area. The

storage area shall be covered from all the four sides by wall or wind barricading shall

be provided by sheets.

iv) Crushing and screening operation should be carried out in enclosed area. Centralized

de dusting facility (collection hood and suction arrangement) followed by de dusting

unit like bag filter and final discharge of emission done through a stack in order to

control fugitive particulate matter emissions. Particulate matter emission level in the

Draft EIA report for Narmada Thermal Power Limited 5-5

stack should not exceed 50 mg/Nm3. Water sprinkling arrangement should be

provided at raw material heaps and on land around the crushing and screening units.

v) Work area including the roads surrounding the plant shall be asphalted or concreted.

vi) Enclosure should be provided for belt conveyors and transfer points of belt

conveyors.

The above enclosures will be rigid and permanent and fitted with self closing doors and

close fitting entrances and exits, where conveyors pass through the enclosures. Flexible

covers shall be installed at entry and exit of the conveyor to the enclosures, minimizing

the gaps around the conveyors.

5.3.1.2 Fly ash handling

Control techniques for fugitive dust emission from ash storage pond, involves watering,

chemical stabilization, reduction of surface wind speed with windbreaks or source

enclosures. Watering, the most common and, generally, least expensive method, provide

only temporary dust control.

The use of chemicals or treat-exposed surfaces provides longer dust suppression, but will

be costly. Effective control of fugitive emissions will be achieved by either of the

following ways, in isolation or in combination.

i) By providing a containment enclosures to the dust-generating source (thereby

isolating/containing the source from wind currents) in order to contain the

airborne emissions within the enclosures. The same shall be achieved by

providing a wall at the periphery of the ash pond/ loading unloading area/ ash

silo. The height of the wall will be decided during detail engineering.

ii) By suppressing the dust by spraying water so that the dust settles down & remain

suppressed till the moisture evaporates. The detailed design of dust suppression

system for the ash pond will be taken up during engineering.

The SPM in the vicinity of the ash storage pond shall be maintained below

statutory norms.

The details fly has handling system is discussed in upcoming sections.

Water Sprinklers

Type of sprinkler system envisaged for control of dust nuisance in the ash and coal

storage area with its specifications is as given below

No. of sprinklers : 132

Pipe diameter : 5 inch

Draft EIA report for Narmada Thermal Power Limited 5-6

5.4 WATER ENVIRONMENT

5.4.1 Water Conservation steps

The first step toward the management of water environment would be conservation of

the raw water. Proper step shall be taken to conserve the water from the operation

phase, apart from the reuse and recycle of the wastewater generated .Conservation of

raw water will also facilitate the mitigation of wastewater generation. As far as possible

boiler blow-down and steam condensate will be recovered and reused for floor wash and

other non-process applications. By adopting these measures it is estimated that 2% of

the total water consumption.

Conservation of raw water will also facilitate the mitigation of waste water generation.

• Storm water drainage network shall be designed

• Faucets uses are of low water consumption type.

• W.C, Flush and Urinal Flush valve are of low water consumption type

• Waste Water generated will be reused within the premises

Liquid effluents generated from the TPP would consist of water pre-treatment plant

waste, routine floor washing waste, sanitary waste, D.M plant reject etc.

The clarifier sludge would be separately taken to a sludge treatment plant for removal

of solids.

5.4.2 Rain Water Harvesting

As the project site is located in water rich area it is not practically feasible to recharge

the ground water by rain water harvesting system. Hence it is not envisaged for the

proposed project.

Storm water drainage has been constructed to lead the rain water to common collection

pond and the collected water shall be reused in the process.

5.4.3 Waste water Generated

Water balance diagram of water consumption and wastewater generation, treatment and

disposal is given in chapter 4, section 4.4, page 4-11.

The waste water generated as blow down from cooling tower and boiler, rejects from

different process shall be collected in the neutralization pit and after dilution will be

reused within the plant for green belt development, dust handling area and plant

washing.

Oily wastes will be processed through oil separators to trap oil from the effluents

emanating from the Oil Handling Area.

Draft EIA report for Narmada Thermal Power Limited 5-7

The waste water generated shall be recycle back in the system and reused as sprinkling

on road, coal storage area, ash storage area and green belt development.

The quantity of waste water to be reused is as given below

Green belt : 1317.88 m3/day

Ash conditioning/ coal and dust handling : 70 m3/day

Washing - Oil unloading area : 20 m3/day

Plant washing : 20 m3/day

The total land available for the above usage is 74 acres.

The domestic waste water will be treated in sewage treatment plant.

5.5 SOLID/ HAZARD WASTE GENERATION

The used oil generated will be temporarily stored in drums in isolated covered room and

later will be disposed off through registered recycler. Discarded containers generated will

also be stored in the isolated area and later sold to approved recyclers. ETP sludge and

used resins shall be in covered isolated area and later disposed off at approved land fill

site.

The membership certificate of TSDF site for the disposal of hazardous waste generated is

attached herewith as annexure 5.

Direct manual handling of waste will be avoided. The person handling the waste will be

equipped with hand gloves resistant to the waste, respiratory mask and goggles.

Record of the hazardous waste generated shall be maintained as per the Hazardous

waste rules 2008 in the prescribed format and the same shall be regularly submitted to

statutory authority. Prior to dispatch of the waste to the recycler company representative

will keep a check on the valid authorization and approval obtained by the recycler from

Central Pollution Control board.

5.5.1 Fly Ash management

The fly ash generated will be collected and stored in fly ash silos.

Regular water sprinkling shall be done in the fly ash storage area.

The fly ash generated shall be transported in dumpers from generation point to

the final disposal point

The fly ash generated will be sold to brick/cement manufacturers and the MoU

with the near by brick manufacturer is attached as annexure 6.

Draft EIA report for Narmada Thermal Power Limited 5-8

5.5.1.1 Ash handling system

The ash handling system envisages wet extraction and disposal of bottom ash & dry

extraction for fly ash. The fly ash will be extracted in dry form from the electrostatic

precipitator hoppers, economizer & air heater hoppers and stack hopper and transported

to storage silo as a measure for promoting ash utilization.

System capacities furnished below have been arrived at considering coal consumption at

MCR condition as 103 TPH for 1 x 135 MW units and ash content as 40% for Indian coal.

a) MCR coal firing rate per unit : 103 TPH

b) Rate of ash generation for design of equipment [40% for

coal]

: 41.2 TPH

c) Rate of bottom ash formation [20% of (b)] : 8 TPH

d) Bottom ash removal capacity considered on continuous

removal basis ( 1.5 x item C)

: 12 TPH

e) Rate of fly ash formation (80% of (b)) : 33 TPH

f) Total fly ash formed in 8 hours per unit : 264 T

g) Time required for removal of fly ash generated in 8 hours : 4 hours & 30 min

h) Fly ash system capacity required [(f) / (g)] : 58.6 TPH

i) Fly ash removal system capacity selected : 60 TPH

Bottom ash handling system capacity of 12 TPH for each unit will be based on an

average ash generation of 8 TPH per unit to enable removal of ash collected considering

outages in downstream system. Fly ash handling system capacity for each unit will be

based on an ash generation of 33 TPH per unit to enable removal of ash collected in 8

hours of ash collected in bottom ash hoppers in 4 ½ hours.

Dense phase type system

Fly ash resulting from the combustion of coal in the boiler gets collected in economizer

hopper, air heater hopper, ESP hoppers etc. For collecting fly ash in dry form, the

system will be designed such that, the fly ash and conveying air mixture will be

conveyed to storage silo with bag filters. Once in eight (8) hours shift, the fly ash will be

sequentially extracted from these hoppers. The fly ash handling system will be designed

to collect ash in dry form in fly ash silos through pneumatic pressure conveying system,

as described below:

Draft EIA report for Narmada Thermal Power Limited 5-9

The fly ash collected in hoppers will be gravity fed into individual ash vessels provided

below each hoppers. Each ash vessel will be provided with one (1) manual operated

knife type gate valve, one (1) stainless steel expansion bellow, one (1) pneumatic

operated ash intake valve (dome type) etc.

On initiation of fly ash removal cycle, ash inlet valve on upstream of ash vessel will be

opened and fly ash will be fed by gravity into the ash vessel after which the inlet valve

will close. On closure of ash inlet valve, the conveying compressed air will be supplied to

the ash vessel (by opening the air inlet valve). On reaching the pre-determined

conveying pressure in the vessel, the fly ash will be conveyed to fly ash silos with the

help of compressed air through transport piping. MS ERW pipe work conforming to

IS:1239 (H) will be provided for transporting ash collected in ESP hoppers to either of

the fly ash silos. The conveying air will be vented to atmosphere through bag filters

mounted on top of silo.

The conveying air required for the system will be drawn from conveying air compressors.

The instrument air required for the operation of various valves will be drawn from the

plant instrument air service.

A vent filter will be mounted on the silo to reduce the environmental pollution. The

system controls will be such that, it will be possible to stop unloading fly ash from any

hopper or to bypass any hopper, as desired by the operator. Fly ash removal of each unit

at full load will take about four hours & fifteen minutes in a shift of eight (8) hours for

ash collected in various hoppers while firing worst coal.

5.5.1.2 Disposal of Ash

Disposal of Fly Ash from Silo

Dry fly ash from the air pre-heater, stack hopper, Eco. hoppers and ESP hoppers will be

collected in the fly ash storage silo. The storage silos two nos will be designed to have a

storage capacity of 750 tonnes each which caters for twenty four hours of fly ash

generation. The dry fly ash collected in the storage silo will be normally disposed in the

dry conditioned form. The fly ash will be unloaded in dry form through rotary feeder and

double shaft paddle type dust conditioners to open trucks for utilization of fly ash. The fly

ash conveying air will be vented to the atmosphere through vent bag filter to mitigate

the environmental pollution. Fly ash silos will be provided with three (3) outlets - one for

disposal of ash in conditioned form into open trucks through ash conditioner and other

for disposal of fly ash in dry form to closed container trucks through telescopic unloading

spout.

Draft EIA report for Narmada Thermal Power Limited 5-10

Disposal of Bottom ash

The bottom ash will be disposed in ash pond. Bottom ash collected in silo of capacity 350

tonnes (about 48 hrs’ storage capacity) will be transported thru’ trucks to the ash dyke.

Provisions in the silo will be as that of fly ash silo. Efforts will be made to dispose the ash

to landfill use etc.

5.5.1.3 Ash Disposal Area

An ash dyke in an area of 42 acres will be installed mainly to dispose off bottom ash in

case the off take by other agencies is delayed due to unforeseen reasons. The ash pond

dyke will be of maximum 15m height. Suitable impervious lining for the ash pond will be

provided to prevent leaching of ash from the pond. Water Sprinklers will be provided to

contain fugitive dust emission. Efforts will be made to grow plantation over the dyke.

5.6 CLEANER PRODUCTION

The following initiatives shall be taken under cleaner production for the proposed

project:

Control of Fugitive Emissions at the raw material and fly ash handling side

Complete utilization of fly ash for cement/ brick manufacturing units.

Near complete recovery and recycling of the fines in the materials handling train

by increasing availability of the dust capturing devices, better operational control

and preventive maintenance of the dust capturing devices

Reuse of the non utilizable vitrified material and wastes for filling of low lying land

in the plant premises for preparation of land for expansion

Use of solar energy will be made wherever possible. Food preparation will be

done in canteen using solar cookers. Electricity to light canteen, parking zone,

office area will be generated vide solar energy. Solar heater will be installed at

company guest house.

For the proposed project initially 653.34 KL/day of water shall be required in

cooling tower but in the later stages the water requirement will decrease due to

use of recycle water. Only make up water will be required. Hence there will be

conservation of water.

The term cycles of concentration (COC) compares the level of solids of the

recirculating cooling tower to the level of solids of the original raw make up

water. The circulating water will have five times the solids concentration than that

of the make up water, thus the cycles will be 5.

The following measures shall be taken in the plant under cleaner production activities.

Draft EIA report for Narmada Thermal Power Limited 5-11

Table 5.1: Action plan for implementation of CP

Sr. CP Issue/Measure

Action Plan

1 Raw material handling & preparation area

Automated water spraying system. Work

zone should be hard paved to reduce

dusting due to transportation of vehicles

2 Near complete recovery of fines in the

materials handling train at

a. Crushing and screening of coal (Materials

circuits)

b. Raw material feeding point.

c. Coal injection point to boiler

d. Cooler discharge circuit

a. Pulse jet bag filter

b. Pulse jet bag filter

c. Pulse jet bag filter

d. Pulse jet bag filter

3 Material transfer points and conveyer belts Localized loss of cladding due to constant

repairs and local modification of the

conveyer routes and chutes to be reclad

and the exhaust ventilation system to be

made re effective

4 Sprinkler system in the stock yard and

provision of water fogging at the time of

truck loading/unloading operations

Feasibility and basic engineering for the

sprinkler system being carried out

5 Better house keeping To be implemented

6 Waste water generation 100 % waste water generated in the form

of DM reject, boiler blow down and

cooling tower blow down is reused within

the plant premises for gardening, dust

suppression and cooling purpose

7 Fly ash Sold to near by brick/cement

manufacturers

Draft EIA report for Narmada Thermal Power Limited 5-12

5.7 ENVIRONMENT MANAGEMENT PLAN FOR LAND/ SOIL ENVIRONMENT

Proper care shall be taken in order to protect the land from the pollution caused due to

spillage of oil and other waste material.

Proper dyke are provided in order to prevent the spillage of oil directly on ground.

Waste water generated shall be treated below statutory norms before using for

gardening and plantation.

Domestic waste will be treated in Sewage treatment plant.

Dry paper waste shall be collected in bins instead of throwing on land.

5.8 NOISE ENVIRONMENT

Manufacturers and suppliers of major equipments like compressors, boilers and turbine

should be asked to take required measures for minimizing the noise levels generated by

the machines i.e. using noise absorbing material for enclosures or using appropriate

design/technology for fabricating/assembling machines.

The major noise sources in the proposed plant are the Steam turbine and the

compressors. The equipment hall is planned to be designed in such a way that the

possible leak of sound from the hall to the outside area is architecturally sealed and the

radiators (the air coolers) are proposed to be installed with variable frequency drive

motors which will operate at a very low speed and hence shall have very less noise.

The compressors will be placed in closed building to prevent the dispersion of noise in

the surrounding region. The gas compressor and turbine will be the major noise

generating equipment and in order to restrict the combine effect of noise from both

these sources, they are place apart from each other. Silencers will be installed at noise

generating sources.

The operators working in the high-noise areas shall be strictly instructed to use ear-

muffs/ear-plugs and shift timings will be adjusted as per the Factory Act. Green belt

shall be developed to attenuate noise and the extent of green belt shall be as per CPCB

guidelines. Noise barriers in the form of trees will be grown around the plant boundary.

Personnel working near the vibrating machinery in different units shall be provided with

well-designed vibration resistant hand gloves/ foot wears and suitable Personal

Protection Equipments (PPEs).Vibration generating sources and their platforms shall be

maintained properly to minimize vibrations and related impacts. Training of personnel is

recommended to create awareness about the damaging effects of vibrations; if PPEs are

not used as regular practice while on duty. Regular noise monitoring on weekly basis will

Draft EIA report for Narmada Thermal Power Limited 5-13

be carried out at the noise generating sources mainly at the compressor building and the

turbine room as well as the entry - exit gates of the plant.

Greenbelt development within and around the plant shall be undertaken through

plantation of appropriate native species. Plantation apart from improving the aesthetics,

would act as sink for gaseous pollutants and masking for noise generated at the project.

5.9 GREEN BELT DEVELOPMENT

In order to reduce the air pollutants concentration and to reduce the wind blown dust to

escape from the project premises to the near by localities and to resist the noise

generated due to plant activity and as source to uptake the wastewater generated to

some extent, it is recommended to develop green belt around the periphery of the plant,

surrounding the coal storage yard, Ash dyke, and along the road side. There won’t be

any relocation of existing trees in the near vicinity of the project site as far as possible.

The total green belt area of about 42 acres has been demarcated for the proposed

project in the layout. In addition to development of green belt within the premises the

company is committed to carry out aforestation and biodiversity improvement

programme in the surrounding villages.

5.9.1 Recommended Plants for Green Belt Development

Greenbelts are an effective mode of control of air pollution, where green plants form a

surface capable of absorbing air pollutants and forming a sink of pollutants. Leaves with

their vast area in a tree crown, sorbs pollutants on their surface, thus effectively reduce

pollutant concentration in the ambient air. Often the adsorbed pollutants are

incorporated in the metabolic pathway and the air is purified. Plants grown to function as

pollution sink are collectively referred as greenbelts.

An important aspect of a greenbelt is that the plants are living organism with their varied

tolerance limit towards the air pollutants. A green belt is effective as a pollutant sink only

within the tolerance limit of constituent plants.

Apart from function as pollution sink, greenbelt would provide other benefit like aesthetic

improvement of the area and providing suitable habitats for birds and animals.

5.9.2 Guidelines for plantation

The plant species identified for greenbelt development shall be planted using pitting

technique. The pit size will be either 45 cm x 45 cm x 45 cm or 60 cm x 60 cm x 60 cm.

Bigger pit size will be considered at marginal and poor quality soil. Soil used for filling

the pit should be mixed with well decomposed farm yard manure or sewage sludge at

the rate of 2.5 kg (on dry weight basis) and 3.6 kg (on dry weight basis) for 45cm x 45

cm x 45 cm and 60 cm x 60 cm x 60 cm size pits respectively. The filling of soil should

Draft EIA report for Narmada Thermal Power Limited 5-14

be completed at least 5-10 days before actual plantation. Healthy sapling of identified

species should be planted in each pit with the commencement of monsoon. Provision for

regular and liberal watering during the summer period during the commissioning stage

of the plant will be arranged from the local available resources. After the proposed

thermal power plant became operational, treated waste water shall be available for

watering the planted trees and shrubs. The authorities responsible for plantation will also

make adequate measures for the protection of the saplings.

While making choices of plant species for cultivation in green belts, weightage has been

given to the natural native species, bio climatic condition, plants which can be grown as

per normal horticultural practices. Plant species identified for greenbelt development,

considering the bio-climatic and soil condition are listed in Table 5.2.

5.9.3 Selection of plants for Greenbelts:

The main limitation for plants to function as scavenger of pollutants are, plant’s

interaction to air pollutants, sensitivity to pollutants, climatic conditions and soil

characteristics. While making choice of plants species for cultivation in green belts, due

consideration has to be given to the natural factor of bio- climate. Xerophytes plants are

not necessarily good for greenbelts; they with their sunken stomata can withstand

pollution by avoidance but are poor absorber of pollutants.

Character of plants mainly considered for affecting absorption of pollutant gases and

removal of dust particle are as follows.

• For absorption of Gases:

Tolerance towards pollutants in question, at concentration, that is not too high to be

instantaneously lethal

Longer duration of foliage

Freely exposed foliage

Adequate height of crown

Openness of foliage in canopy

Big leaves( long and broad laminar surface)

Large number of stomatal apertures

• For Removal of Suspended Particular matter

1. Height and spread of crown.

2. Leaves supported on firm petiole

3. Abundance of surface on bark and foliage

Draft EIA report for Narmada Thermal Power Limited 5-15

4. Roughness of bark

5. Abundance of axillary hairs

6. Hairs or scales on laminar surface

7. Protected Stomata

Table 5.2: Recommended Plant Species for Green Belt Development

PLANT SPECIES HABIT TOLERANCE

LIMIT

STOMATAL

INDEX

MODE OF

REGENERATION

Acacia auriculiformis Tree Tolerant 10.9 Seeds

Acacia leucophloea Shrub T 12.01 Seeds

Ailanthus excels Tree T 13.01 Seeds, shoot, root

cuttings

Albizia amara Tree T -- seeds

Albizia chinensis Tree T -- Seeds

Albizia lebbeck Tree T 19.72 seeds

Albizia procera Tree T 20.21 seeds

Alstona scholaris Tree T 15.23 seeds

Azadirachta indica Tree T 29.2 Seeds

Bougainvillea spectabilis Shrub T 32.53 Cutting

Caesalpinia pulcherrima Tree T 29.09 Seeds and

Cuttings

Callistemon citrinus Small

tree

T 127.49 Seeds

Cassia javanica Tree T seeds

Cassia siamea Tree T 21.2 Seeds

Dalbergia sisoo Tree T 18.72 Seeds/cuttings

Dalbergia latifoloa tree T 10.12 Seeds/ cuttings

Delonix regia

(Gulmohur)

Tree Sensitive 14.38 Seeds /stem

cutting

Hibiscus rosa-sinensis Small T 23.32 stem cutting

Draft EIA report for Narmada Thermal Power Limited 5-16

tree

Ixora arborea Small

tree

T 17.3 stem cutting

Ixora rosea Small

tree

T 20.30 Stem cutting

Kegelia Africana Small

tree

T 12.90 Seeds

Lantana camara shrub T 12.13 Seeds/cuttings

Lowsonia intermis Shrub T 17.0 Seeds/cuttings

Mangifera indica Tree S 30.77 Seeds/

budding/grafting

Melia azadirachta Tree T Seeds /stem

cutting

Nerium indicum Shrub T 15.7 Cutting

Peltophorum

pterocarpum

Tree T 16.78 Seeds

Pithecellobium ducle Tree T 11.78 Seeds/ cuttings

Polyathia longifolia Tree Sensitive 22.27 sedds

Prosopis cineraria Tree T 18.1 Seeds/root suckers

Syzygium cumini tree T 20.60 Seeds

Terminalia catapppa Tree T 20.9 seeds

Thespesia populneoides Tree T 29.81 Seeds/ cuttings

Thevetia peruviana Shrub T 27.8 Seeds

T: Tolerant S- sensitive, (--) =Not available Sources: CPCB (March, 2000) Guidelines

for developing green belts PROBES/75/1999-2000

The trees and shrubs selected from the above mention list based on its availability shall

be, planted as greenbelt of 50 m width around the plant boundary. The plantation will be

in the below mentioned recommended pattern:

Draft EIA report for Narmada Thermal Power Limited 5-17

Table 5.3: Three Tire plantation management

Tire Habit Height in meter Rows

Ist Tire

(Towards boundary)

Trees 10-20 4

IInd Tire ( Middle

layer)

Small tress 5-10 meter 6

IIIrd Tire

( Towards Plant )

Shrubs 1-5 meter Thick pattern

Year wise plantation details and budgetary allocation for the same is given in the table

below

Table 5.4: Budgetary allocation

Year No of plants Budgetary allocation

1st year 1000 3 lakh

2nd year 1000 3 lakh

3rd year 1000 3 lakh

4th year 1000 3 lakh

5th year 1000 3 lakh

5.9.4 Roadside Plantation

Roadside plantation plays a very important role for greening the area, increasing the

shady area, increasing aesthetic value and for eco-development of the area. The

approach roads to project site, colony, etc. can be planted with flowering trees. Trees

can be planted to increase aesthetic value as well as shady area along the roads. The

selected plant species list is given in table 5.5 for Roadside plantation.

Draft EIA report for Narmada Thermal Power Limited 5-18

Table 5.5: Species Selected for Plantation along the roadside of plant and

Township

Sr. No. Based on Color Sr. No. Based on Color

Yellow Flowered Trees

1. Acacia auriculaeformis 10. Erythrina parcelli

2. Acacia baileyana 11. Laburnum anagyroides

3. Acacia dealbata 12. Michelia champaca

4. Acacia decurrens 13. Parkinsonia aculeata

5. Acacia implexa 14. Peltophorum

pterocarpum

6. Anthocephalus chinensis 15. Pterocarpus

dalbergioides

7. Bauhinia tomentosa 16. Schizolobium excelsum

8. Cassia calliantha 17. Tabebuia spectabillis

9. Cassia fistula 18. Thespesia populnea

Red Flowered Trees

1. Bombax ceiba 5. Erythrina variegate

2. Brownea grandiceps 6. Saraca asoca

3. Erythrina blakei 7. Spathodea campanulata

4. Erythrina laurifolia 8. Wrightia coccinea

Scarlet Flowered Trees

1. Barringtonia acutangula 5. Callistemon lanceolatus

2. Brassia actinophylla 6. Delonix regia

3. Brownea coccinea 7. Stenocarpus sinuatus

4. Butea monosperma 8. Sterculia acerifolia

Pink Flowered Trees

1. Bauhinia purpurea 5. Hibiscus collinus

2. Cassia javanica 6. Kleinhovia hospital

Draft EIA report for Narmada Thermal Power Limited 5-19

3. Cassia nodosa (Red) 7. Lagerstroemia speciosa

4. Cassia renigera 8. Samanea saman

Blue Flowered Trees

1. Bolusanthus speciosus 3. Solanum grandiflorum

2. Jacaranda acutifolia 4. Solanum macranthum

White Flowered Trees

1. Albizia lebbeck 8. Mesua ferrea

2. Bauhinia acuminate 9. Millingtonia hortensis

3. Calophyllum inophyllum 10. Mimusops elengi

4. Kydia calycina 11. Moringa oleifera

5. Madhuca indica 12. Oncoba spinosa

6. Magnolia grandiflora 13. Plumeria alba

7. Magnolia pterocarpa

5.10 ENVIRONMENT MANAGEMENT SYSTEM

A full fledge Environment Management Cell will be developed for the proposed

project with the entire necessary infrastructure.

The cell shall be managing the proposed project

A proper record shall be maintained by the cell for the quantity of fuel and water

consumption along with the different types of waste generated.

A regular monitoring program shall be carried out for various environment

parameters.

Proper environment & safety policy should be planned.

The environment management cell comprising experienced and qualified

personnel reporting to the Power Station In-charge regarding environmental

performance and monitoring of environmental quality shall be created

Environmental Management Cell (EMC) will meet at least once a month to assess

the progress and analyze the data collected for the month. Any

deviation/variation noticed shall be immediately taken into consideration for

improvement of the same. Yearly action plan of EMP will be updated with respect

to results achieved and proposed activities for next year.

Draft EIA report for Narmada Thermal Power Limited 5-20

During operational phase of the proposed power plant, overall implementation of EMP

lies with the project proponent for compliance. In order to have effective implementation

of EMP, the following structure of Environment Management Cell is followed.

Figure 5.1: Environment Management Cell

The major duties and responsibilities of Environmental Management Cell shall be as

given below:

To implement the environmental management plan

To assure regulatory compliance with all relevant rules and regulations

To ensure regular operation and maintenance of pollution control devices.

To minimize environmental impacts of operations as by strict adherence to the

EMP

To initiate the environmental monitoring as per approved schedule

Review and interpretation of monitoring as per approved schedule and corrective

measures in case monitoring results are above the specified limits

Maintain documents of good environmental practices and applicable

environmental laws as ready reference

Environmental Management Cell

Environment Head

Environmental Officer

Environmental Engineer

CSR Team

Laboratory Staff

Field Staff

Draft EIA report for Narmada Thermal Power Limited 5-21

Maintain environmental related records

Coordination with regulatory agencies, external consultants, monitoring

laboratories

Maintain of log of public complain and the action taken

Allocation of Resources, Responsibility and Authority will results in successful

implementation of EMP during construction and operational phase.

5.11 BUDGETARY ALLOCATION FOR ENVIRONMENT MANAGEMENT PLAN

Table 5.6 depicts the resources required during construction and operation stages and

the estimated budget against each resource for environment management.

Table 5.6: Estimated Cost for Environmental Management Plan

S. No. Resources Budget allocated for

project

Total recurring cost every

year on maintenance

1 Green Belt 10 lakhs 1 lakh

2 Air & Noise Pollution Control 30 Crores 5 lakhs

3 Water Treatment 1.5 crore 90 lakhs

4 Process & Fire Safety Measures 1 crore 3 lakhs

5

Environmental Monitoring and

Management Programs

25 lakhs 3 lakhs

6

Road, Drainage & Rainwater

harvesting

6.5 crore 5 lakhs

 

Draft EIA report for Narmada Thermal Power Limited 6-1  

Chapter-6 Environmental monitoring program

6.0 POLLUTION MONITORING AND SURVEILLANCE SYSTEM

Regular monitoring of important parameters is of immense importance to assess the

status of environment during plant operation. With the knowledge of baseline conditions,

a properly planned monitoring program can serve as an indicator for assessment of any

deterioration in environmental conditions. This will facilitate undertaking suitable

measures to mitigate adverse impacts during the operation of the plant and further help

to protect the environment in the area. The main attributes for which monitoring shall be

carried out are:

• Ambient air Quality

• Stack Emission

• Wastewater Quality

• Noise Level

For thermal power stations, the Indian Emission Regulations stipulate the limits for

particulate matter emission and minimum stack heights to be maintained for keeping the

Particulate matter, sulphur dioxide and NOx levels in the ambient within the air quality

standards.

The characteristics of the effluent from the plant would be maintained so as to meet the

requirements of the State Pollution Control Board and the Minimum National Standards

for Thermal Power Plants.

6.1 AMBIENT AIR QUALITY MONITORING:

The ambient air quality with respect to NOx, SO2, Suspended particulate matter, PM10

and PM2.5 shall be monitored at least two locations in the project site and two locations in

the surrounding villages within 3 km radius.

The selected monitoring stations shall be monitored for a period 24 hours, twice a week,

once in month. The log book shall be maintained at environmental cell for evaluation of

impact and to decide required mitigatory measures

 

Draft EIA report for Narmada Thermal Power Limited 6-2  

6.2 STACK MONITORING:

All the stacks in the proposed thermal power plant shall be monitored continuously

through online system, with respect to temperature, oxides of nitrogen (NOx),

Suspended Particulate Matter (SPM), Sulphur dioxide (SOx), Carbon monoxide (CO)

level. Pulse-fluorescence method shall be used for NOx detection with data recorders in a

central control room

6.3 NOISE ENVIRONMENT

Monitoring of the noise levels is essential to assess the effectiveness of Environmental

Management Plan implemented to reduce noise levels. A good quality sound level meter

and noise exposure meter may be procured for the same. Audiometric tests shall be

conducted periodically for the employees working close to the high noise sources. The

noise levels due to machines/equipments viz. compressors, diesel generator, steam

turbine generation and boilers etc. should be monitored regularly.

6.4 WATER AND WASTE WATER QUALITY MONITORING

Daily analysis of influent and effluent streams is recommended. Sampling and analysis of

the raw water from the canal, recycled stream from DM plant and wastewater from

individual units; Cooling tower blow down, Boiler blow down, Drainage from the plant,

shall be conducted once in day. Composite sample from the collection pit shall be

collected by flow weighted hourly sampling method for characterizing the wastewater

prior to DM treatment.

6.4.1 Environment laboratory

Methods prescribed in "Standard Methods for Examination of Water and Wastewater"

prepared and published jointly by American Public Health Association (APHA), American

Water Works Association (AWWA) and Water Pollution Control Federation (WPCF), Book

on Water and Wastewater Analysis published by NEERI, Nagpur are recommended for

collection and analysis of water and wastewater samples.

An independent laboratory with facilities for chemical analysis shall be set up within the

premises. The laboratory should have a provision for fume-hood and cold room. A

separate air conditioned dust-proof room will have to be provided for installing analytical

instruments. Following instruments shall be procured for regular monitoring of various

environmental parameters.

 

Draft EIA report for Narmada Thermal Power Limited 6-3  

Table 6.1 : Sampling and analytical Instruments required

Monitoring

requirement

Instruments Quantity

Meteorological

monitoring

Automatic weather station with all necessary

attachments

1

Ambient air Quality Respirable Dust sampler ( PM10) 2

Respirable Dust sampler ( PM2.5) 2

Gaseous sampling attachment 4

Stack Monitoring Stack monitoring Kits and accessories 2

Continuous online NOx, temperature, SPM

analyzer

1+1

Noise Monitoring Sound level meter 1+1

Water and waster

water quality

pH meter 2

Conductivity meter 2

Ion analyzer for Chloride, nitrate and

sulphate

1

UV spectrophotometer 1

DO analyzer 2

BOD incubator 2

COD refluxer 2

Flame photometer 1

Analytical Precision balance 2

Single pan balance 3

Water distillation unit 2

Electric oven 2

Microbiological incubator 2

Trinocular microscope 1

Composite sampler 4+ 1

standby

 

Draft EIA report for Narmada Thermal Power Limited 6-4  

Flow meter 2

Chemicals and

Glassware

All required chemicals and Glassware As required

Table 6.2: Monitoring schedule

Area of

monitoring

Number of

sampling

Frequency of

Sampling

Parameters to be analysed

Ambient air

Quality

Onsite –TWO

Villages=Two

Saltpans-one

Twice a week at

24 hourly in

Month

SPM(PM10and PM 2.5)

NOx, SO2, CO

Stack

Monitoring

All the stacks Online continuous Temperature, NOX, SO2, SPM

Noise Near all the sound

generating

devices and near

the project site

Monthly (day time

and night time)

Sound pressure level (Leq)

Raw water Row water pond Once in day pH. Conductivity, TDS, TSS,

Chloride, Salinity, BOD, COD,

Oil and grease, Phenolic

compounds and Heavy

Liquid

effluents

streams

All the effluent

streams

Once in day-

Composite sample

from the

individual steams

shall be collected

by flow weighted

pH. Conductivity, TDS, TSS,

Chloride, Salinity, BOD, COD,

Oil and grease, Phenolic

compounds and Heavy metals,

Collection pit One Composite sample

from the Guard

pond shall be

collected by flow

weighted hourly

pH. Conductivity, TDS, TSS,

Chloride, Salinity, BOD, COD,

Oil and grease, Phenolic

compounds and Heavy metals

RO plant One from RO

reject stream

Two composite

sampling per day

pH. Conductivity, TDS, TSS,

Chloride, Salinity, BOD, COD,

Oil and grease, Phenolic

compounds and Heavy metals

 

Draft EIA report for Narmada Thermal Power Limited 6-5  

STP One from inlet

and one from out

let

Two composite

sampling per day

pH. Conductivity, TDS, TSS,

Chloride, Salinity, BOD, COD,

Oil and grease, Phenolic

compounds and Heavy metals

Environmental management cell shall be created and qualified persons would be in

charge of monitoring the parameters by using suitable instruments. The detail of

same is discussed in chapter 5, section 5.10, page 5-19.

Post project Environment Monitoring Budgetary allocation:

The total cost allocated for post project monitoring is given in chapter 5, section 5.11,

page 5-21.

 

Draft EIA report of Narmada Thermal Power Limited 7-1  

Chapter-7 Project Benefits

The company is committed for contribution of funds and provides the services for the

upliftment of local community in the nearby villages. The different activities to be

undertaken by the company are mentioned in this chapter

7.1 Socio economic activities

Programs for environmental education and public participation shall be developed

with the help of audio visual aids to create awareness about the activities.

Camps to apprise people of likely environmental hazards due to proposed

facilities shall be organized.

Proper awareness campaign shall be organized by the project proponent for water

conservation.

Periodic health check up camps shall be organized by the project authority for

workers families.

Free Medical Facility inside the premises for all employees & tie up with the

nearest hospital for further treatment

Medical center will provided to the near by villager at the Free cost.

In order to increase the aesthetic environment, road side plantation program shall

be carried out in the near by villages.

The company shall make collaborative effort with the local authorities of the

village for the social welfare activities to be undertaken in the villages.

Improvement in infrastructure facilities shall be done in collaboration with the

local gram Panchayat.

Widening of internal road from the project site to the major district road shall be

under taken by the project proponent.

Street lights in the villages shall be provided

Group Insurance to all employees over and above the Employees State Insurance

Scheme

Subsidized food in a well equipped and hygienic canteen

Subsidized Transportation facility for all employees for all shifts

Annual get-together and rewards for workers’ kids who have shown brilliance in

education, sports, cultural activities

Free distribution of PPE and 2 sets of Uniform per year

 

Draft EIA report of Narmada Thermal Power Limited 7-2  

Fire & Safety Training will be imparted to employees.

Fire fighting and Safety Week will be observed and quiz and essay competitions

will be organized to develop awareness in employees on the subject.

Celebration of International Environment Day every year on 5th June will be

marked by plantation of number of trees by employees in order to develop

awareness in them about protecting environment from pollution and to save

earth.

Community Awareness programmed like Aids awareness, Polio camps, Eye camps

and blood donation camps will be organized in the company and in its vicinity

from time to time for the benefit of employees and their families and people living

in the surrounding area.

Regular donations will be made in the nearby schools and temples.

7.2 EMPLOYMENT POTENTIAL:

There will be increase in the employment facilities due to the upcoming project. The total

no. of skilled and unskilled worker to be employed for the proposed project is as given

below.

Table 7.1: Employment details

No. of skilled employees 70 nos.

No. of unskilled employees 100 nos.

Total employees for proposed project 170 nos.

7.3 BUDGETARY ALLOCATION

Adequate funds as per the statutory requirement will be allotted for various socio

economic activities to be undertaken in the villages. The details regarding fund allocation

for next five years for the socio economic upliftment of the area is as given in the table

below:

Year Budgetary allocation

2012 20 lakh

2013 20 lakh

2014 20 lakh

2015 20 lakh

2016 20 lakh

 

Draft EIA report for Narmada Thermal Power Limited 8-1  

Chapter 8 Risk assessment and damage control

8.1 INTRODUCTION

A risk assessment is a careful examination of consequences resulting from the undesired

events that could cause harm to people or property, so that sufficient precautions can be

taken. Workers and others have a right to be protected from harm caused by a failure to

take reasonable control measures.

8.2 OBJECTIVES OF THE RISK ASSESSMENT

As per the requirements stated in the Terms of Reference of the EIA study, the risk

assessment study has been undertaken to address the following aspects:

• To identify and assess those fire and explosion hazard arising from the storage

and use of the fuel in the project that require management in order to comply

with regulatory requirements, company policy and business requirements.

• To eliminate or reduce to as low as reasonably practical in terms of risk to human

health, risk of injury, risk of damage to plant, equipment and environment,

business interruption or loss etc.

8.3 THE RISK ASSESSMENT PROCESS

Risk assessment involves the identification of the hazards present and an estimate of the

extent of the risks involved, taking into account whatever precautions are inherent to the

process/activity.

There are more than one approach to risk assessment, for example:

• Look at each activity (not forgetting non-routine activities, e.g., maintenance,

breakdowns etc.). That could cause harm or adverse effects;

• Look at hazards and risks in groups e.g. machinery, transport, materials,

electrical etc;

• Look at each section e.g. stores, workshop, laboratory, office, etc.

The approach should match the circumstances.

The actions required for an assessment to be suitable and sufficient and compliant with

other legal requirements are summarized in the following five steps:

Step 1 - Identify the hazards

Step 2 - Decide who might be harmed and how

Step 3 - Evaluate the risks and decide on precautions

 

Draft EIA report for Narmada Thermal Power Limited 8-2  

Step 4 - Record your findings and implement them

Step 5 - Review your assessment and update if necessary

Step 1 Identify the hazards

There are a number of simple ways in which hazards can be identified. In order to

achieve a suitable and sufficient risk assessment it is essential to identify all the hazards

associated with an activity.

Step 2 Decide who might be harmed

Look for who may be harmed by the hazards and how. Include people who may not be

in the workplace all the time, e.g. cleaners, visitors, contractors, maintenance personnel,

members of the public, etc. If the workplace is shared with others, include them too if

there is a chance that they may be harmed in some way by the activities

Step 3 Evaluate the risks arising from the hazards and decide what should be

done to control them

Is there any real chance of harm? Take account of any precautions that are inherent to

the process/activity; check against guidelines and consider whether the precautions are

adequate and, if not, what further action is needed.

Go through the following questions:

• can the hazard be removed altogether (substitution of the hazard or permanent

removal of the hazard)

• If not, how can the risks be controlled so that harm is unlikely (control measures

taken in order to minimize/remove the risk).

Hierarchies of Control: There are five classes of measure for controlling risk and they

need to be considered and applied in the order below:

1. Elimination/substitution

• Elimination (e.g. buying ready-mixed or pre-assembled materials or

equipment);

• Substitution by something less hazardous and involving less risk.

2. Engineering controls

• Enclosure (enclose it in a way that eliminates or controls the hazard/risk);

• Guarding/segregation of people.

3. Administrative controls

 

Draft EIA report for Narmada Thermal Power Limited 8-3  

• Safe system of work that reduces the risk to an acceptable level (e.g.

standard operating procedure);

• Permits to work;

• Controlled areas;

• Written procedures that are known and understood by those affected;

• Adequate supervision;

• Identification of training needs.

4. Personal protective equipment

5. Information/instruction (e.g., signs, handouts)

Some controls are essential. In many cases a suitable combination of control methods

may be necessary.

Step 4 Record the findings and put into practice the control measures.

The record can be greatly simplified by referring to other documentation, such as

manuals, health and safety procedures. These may well already have listed hazards for

equipment or processes and the precautions and arrangements for controlling risk. It is

not necessary to repeat all that. Similarly, reference can be made to other assessments

where they are relevant. If the required other assessment does not exist then the

outcome of this general risk assessment will be to request the appropriate specific

assessment.

If a workplace is shared, others must be told about any risks the work could cause them,

and what is being done to protect them.

Step 5 Review the assessment from time to time and revise it if necessary

Workplace changes, new equipment, substances and procedures could lead to new

hazards and risks. If there is any significant change, then the assessment should be

revised to take account of the new hazard. In any case, it is good practice for

assessments to be reviewed periodically and in some cases, it is a statutory requirement.

However, don't amend assessments for every trivial change, or for every new job that

has to be attempted. Walk around the area and look afresh at what can reasonably be

foreseen as likely to cause harm. Ask the people who work there what they think.

They may come up with hazards which they have noticed in the course of their work and

which are not immediately obvious. Accident records, manufacturers' instructions, or

data sheets can also help.

 

Draft EIA report for Narmada Thermal Power Limited 8-4  

8.4 IDENTIFICATION OF HAZARDS

8.4.1 Fire And Explosion Index & Toxicity Index

Fire and Explosion Index (F&EI) is an important technique employed for hazards

identification process. Consequence analysis then quantifies the vulnerable zone for a

conceived incident. Once vulnerable zone is identified for an incident, measures can be

formulated to eliminate or reduce damage to plant and potential injury to personnel.

Rapid ranking of hazard of an entire installation, if it is small, or a portion of it, if it is

large, is often done to obtain a quick assessment of degree of the risk involved. The Dow

Fire and Explosion Index (F&EI) and Toxicity Index (TI) are the most popular methods

for Rapid Hazard Ranking. These are based on a formal systematized approach, mostly

independent of judgmental factors, for determining the relative magnitude of the

hazards in an installation using hazardous (inflammable, explosive and toxic) materials.

The steps involved in the determination of the F&EI and TI are:

· Selection of a pertinent process unit

· Determination of the Material Factor (MF)

· Determination of the Toxicity Factor (Th)

· Determination of the Supplement to Maximum Allowable Concentration(Ts)

· Determination of the General Process Hazard Factor (GPH)

· Determination of the Special Process Hazard Factor (SPH)

· Determination of the F&EI value

· Determination of the TI value

· Determination of the Exposure Area

8.4.1.1 Hazardous Material Identification Methodology

From the preliminary appraisal of Material Safety Data Sheet, it is observed that both

furnace oil and natural gas are inflammable and hazardous. F&EI and TI values have

been computed for Natural gas supply pipeline and Furnace oil storage (500 KL) has

been conducted.

In general, the higher is the value of material factor (MF), the more inflammable and

explosive is the material. Similarly, higher values of toxicity factor (Th) and supplement

to maximum allowable concentration (Ts) indicate higher toxicity of the material. The

tabulated values of MF, Th and Ts are given in Dows Fire and Explosion Index Hazard

Classification Guide. For compounds not listed in Dow reference, MF can be computed

from the knowledge of flammability and reactivity classification, Th can be computed

 

Draft EIA report for Narmada Thermal Power Limited 8-5  

from the knowledge of the National Fire Protection Association (NFPA) Index and Ts can

be obtained from the knowledge of maximum allowable concentration (MAC) values. The

MF, Th and Ts values are respectively 16, 0 and 50 for crude oil, 21, 0 and 50 for natural

gas, and 10, 0 and 50 for HSD.

General process hazards (GPH) are computed by adding the penalties applied for the

various process factor.

Special process hazards (SPH) are computed by adding the penalties applied for the

process and natural factors.

Both General process hazards and Special process hazards corresponding to various

process and natural factors are used with MF to compute F&EI value and with Th and Ts

to compute TI value.

8.4.1.2 F&EI Computation

F&EI value computed for TPS and CTT from GPH and SPH values using the following

formula are given in Table 6.1:

F&EI = MF x [1 + GPH (total)] x [1 + SPH (total)]

8.4.1.3 Toxicity Index (TI)

Toxicity index (TI) is computed from toxicity factor (Th) and supplement to maximum

allowable concentrations (Ts) using the following relationship:

TI = (Th + Ts) x [1 + GPH (total) + SPH (total)]/100

Calculation for F&EI as well as TI is given in table shown below for coal, HSD and

chlorine.

Table 8.1: Fire and explosion index for coal

FIRE AND EXPLOSION INDEX FOR COAL

Material Factor 16 st-1, Nr-0

1 GPH

Penalty

factor range

Penalty

factor used Remark

Base factor 1.00 1.00 Base factor

A Exothermic reaction 0.3-1.25 0.50

For ongoing oxidation

process

B Endothermic process 0.2-0.4 0.00 NA

C Material handling and transfer 0.2-1.05 0.40 NFPA 2

 

Draft EIA report for Narmada Thermal Power Limited 8-6  

D

Enclosed or Indoor process

unit 0.25-0.9 0.00 Proper ventilation

E Access 0.2-0.35 0.00 Two side easy access

F Drainage & spill control 0.25-0.5 0.00 Flash point not applicable

General process Hazard

factor F1 1.90

2 SPH

Penalty

factor range

Penalty

factor used

Base factor 1.00 1.00

A Toxic material 0.2-0.8 0.40 0.2×2

B

Sub atmospheric

pressure(<500 mmhg) 0.5 0.00

C

Operation in or near flamable

range 0.00 No operation storage

1

Tank farm storage flammable

liquid 0.5

2 Process upset or purge failure 0.3

3 Always in flammable range 0.8

D Dust Explosion 0.25-2.0 0.5 150-175 micron

E pressure 0.86-1.5 0

F Low temperature 0.2-0.3 0

G

Quantity of flammable /

unstable material

1 Liquid or gases in process 0.2-3 0

2 Liquid or gases in storage 0.1-1.6 0

3

Combustible solid in storage,

dust in process 0.2-4 0.6

Based on 154 ×10^6

pound storage

H Corrossion & Eroission 0.1-0.75 0

I Leakage joint and packing 0.1-1.5 0

J Use of fired equipment 0.1-1 0

 

Draft EIA report for Narmada Thermal Power Limited 8-7  

K Hot oil heat exchange system 0.15-1.15 0

L Rotating equipment 0.5 0

Special process Hazard F2 2.50

Process unit hazard

factor(F1×F2)=F3 4.75

Fire and Explosion

Index(F3×MF) 76

Toxicity number Th 50 Nh=1

Penalty factor Ts 50 TLV 0.5 ppm

Toxicity Index 3.40

Table 8.2: Fire and explosion index for HSD storage

FIRE AND EXPLOSION INDEX FOR HSD STORAGE

Material Factor 10 Nf=2, Nr=0

1 GPH

Penalty

factor range

Penalty

factor used Remark

Base factor 1.00 1.00 Base factor

A Exothermic reaction 0.3-1.25 0.00 No reaction

B Endothermic process 0.2-0.4 0.00 NA

C Material handling and transfer 0.2-1.05 0.40 NFPA 2

D

Enclosed or Indoor process

unit 0.25-0.9 0.00 Not Enclosed

E Access 0.2-0.35 0.00

Two side easy access so

NA

F Drainage & spill control 0.25-0.5 0.00 Proper dike design so NA

General process Hazard

factor F1 1.40

2 SPH

Penalty

factor range

Penalty

factor used

Base factor 1.00 1.00

 

Draft EIA report for Narmada Thermal Power Limited 8-8  

A Toxic material 0.2-0.8 0.20 0.2×1

B

Sub atmospheric

pressure(<500 mmhg) 0.5 0.00 NA

C

Operation in or near

flammable range

1

Tank farm storage flammable

liquid 0.5 0.5

2 Process upset or purge failure 0.3

3 Always in flammable range 0.8

D Dust Explosion 0.25-2.0 0 NA

E pressure 0.86-1.5 0 NA

F Low temperature 0.2-0.3 0 NA

G

Quantity of flammable /

unstable material

1 Liquid or gases in process 0.2-3 0 NA

2 Liquid or gases in storage 0.1-1.6 0.7

14.7×10^9 BTU in

storage

3

Combustible solid in storage,

dust in process 0.2-4 0 NA

H Corrossion & Eroission 0.1-0.75 0.1 <0.005 in per year

I Leakage joint and packing 0.1-1.5 0.1 possibilty of minor leakage

J Use of fired equipment 0.1-1 0 NA

K Hot oil heat exchange system 0.15-1.15 0 NA

L Rotating equipment 0.5 0 NA

Special process Hazard F2 2.60

Process unit hazard

factor(F1×F2)=F3 3.64

Fire and Explosion

Index(F3×MF) 36.4

Toxicity number Th 50 Nh=1

 

Draft EIA report for Narmada Thermal Power Limited 8-9  

Penalty factor Ts 50 TLV more than 50 ppm

Toxicity Index 3

Table 8.3: Fire and explosion index for chlorine

TOXICITY INDEX FOR CHLORINE

Material Factor 1 NF=0, NR=0

1 GPH

Penalty

factor range

Penalty

factor used Remark

Base factor 1.00 1.00 Base factor

A Exothermic reaction 0.3-1.25 0.00

For on going oxidation

process

B Endothermic process 0.2-0.4 0.00 NA

C Material handling and transfer 0.2-1.05 0.00 NFPA 2

D

Enclosed or Indoor process

unit 0.25-0.9 0.00 Proper ventilation

E Access 0.2-0.35 0.00 Two side easy access

F Drainage & spill control 0.25-0.5 0.00 Flash point not applicable

General process Hazard

factor F1 1.00

2 SPH

Penalty

factor range

Penalty

factor used

Base factor 1.00 1.00

A Toxic material 0.2-0.8 0.80 0.2×4

B

Sub atmospheric

pressure(<500 mmhg) 0.5 0.00

C

Operation in or near flamable

range 0.00 No operation storage

1

Tank farm storage flammable

liquid 0.5

2 Process upset or purge failure 0.3

 

Draft EIA report for Narmada Thermal Power Limited 8-10  

3 Always in flammable range 0.8

D Dust Explosion 0.25-2.0 0

E pressure 0.86-1.5 0.86 9 Kg storage

F Low temperature 0.2-0.3 0

G

Quantity of flammable /

unstable material

1 Liquid or gases in process 0.2-3 0

2 Liquid or gases in storage 0.1-1.6 0

3

Combustible solid in storage,

dust in process 0.2-4 0

H Corrosion & Erosion 0.1-0.75 0.1

rate less than 0.15mm per

year

I Leakage joint and packing 0.1-1.5 0 Not minor leakage

J Use of fired equipment 0.1-1 0

K Hot oil heat exchange system 0.15-1.15 0

L Rotating equipment 0.5 0

Special process Hazard F2 2.76

Process unit hazard

factor(F1×F2)=F3 2.76

Fire and Explosion

Index(F3×MF) 2.76

Toxicity number Th 325 Nh=4

Penalty factor Ts 125 TLV 0.5 ppm

Toxicity Index 12.42

 

Draft EIA report for Narmada Thermal Power Limited 8-11  

Table 8.4: Conclusion

CONCLUSION FOR FIRE & EXPLOSION INDEX

1 Applicable Fire and Explosion index range 1-60 Light

2 61-96 Moderate

3 97-127 Intermediate

4 128-158 Heavy

5 >159 Sever

CONCLUSION FOR TOXICITY INDEX

1 Applicable Toxicity index range 1-5 Light

2 6-9 Moderate

3 above 10 High

8.4.1.4 Hazards Ranking

From the table above, F&EI value calculated for coal is 76 which fall in the range of

moderate hazard ranking range, HSD is 36.4 which is fall in the range of light hazard

ranking range and for chlorine is 2.76 which fall in the range of light hazard ranking. TI

value calculated for coal is 3.4 which is fall in the range of light hazard ranking range,

HSD is 3 which is fall in the range of light hazard ranking range and for chlorine the TI

value is 12.42 which shows high hazard ranking. Fire, explosion and toxicity index for

LDO is similar to HSD and hence the indexes are considered same for LDO.

From the above various hazards identified from the proposed project activities are as

under:

• Health hazards due to handling of Coal.

• Fire hazard due to handling and storage of Combustible Coal.

• Large quantity storage of HSD and LDO.

• Health hazards due to handling Chlorine.

Other hazards are:

• Electrical hazards due to generation and transmission of power.

• Other mechanical hazards in maintenance and operation.

 

Draft EIA report for Narmada Thermal Power Limited 8-12  

Consequences of hazards also depend on prevailing meteorological conditions and

density of population in surrounding areas.

8.4.2 Consequence Analysis

Consequence analysis quantifies vulnerable zone for a conceived incident and once the

vulnerable zone is identified for an incident, measures can be proposed to eliminate

damage to plant and potential injury to personnel. For consequence analysis both units

chosen for hazards analysis are considered. The following likely primary scenarios

considered for hazard analysis

• Catastrophic failure of HSD storage tank.

• Catastrophic failure of LDO storage tank.

• Rupture of chlorine cylinder.

Damage area from the above scenarios is presented in the model developed with HAMS-

GPS software and presented as below.

 

Draft EIA report for Narmada Thermal Power Limited 8-13  

HAMS-GPS: Fire Model Date : Monday, June 20, 2011

[Licensed to: Detox Corporation Pvt. Ltd. (Surat)]

Scale:- 1 : 14.64 m

Scenario: 1. Tank-Fixed roof/No roof catastrophic failure liquid dyke pool fire

 

Draft EIA report for Narmada Thermal Power Limited 8-14  

HAMS-GPS: Fire Model Date: Monday, June 20, 2011

[Licensed to: Detox Corporation Pvt. Ltd. (Surat)]

Scale:- 1 : 6.91 m

Scenario: 1. Tank-Fixed roof/No roof catastrophic failure liquid dyke pool fire

 

Draft EIA report for Narmada Thermal Power Limited 8-15  

HAMS-GPS: Dispersion Model Date: Thursday, June 16, 2011

[Licensed to: Detox Corporation Pvt. Ltd. (Surat)]

Scale:- 1 : 358.93 m

Scenario: 1. CLG Tank rupture Flash Vaporization forming Gas Cloud (SMOD-b6 Puff Dispersion DF)

 

Draft EIA report for Narmada Thermal Power Limited 8-16  

8.5 RISK ANALYSIS DUE TO STORAGE AND HANDLING OF COAL

Area of assessment

The proposed power generation capacity of the project is 270 MW.

Coal Requirement

The annual coal requirement at 85% PFL for 270 MW is about 1.144 million tones

considering using 100% imported coal and 1.53 million tones considering using 100%

Indian coal. The coal storage will be for 30 days requirement. Thus the maximum coal

storage at site will be 95333 MT in case of 100% imported coal and 127500MT in case of

using 100% Indian coal.

Considering the fact that the Coal storage area will be provided with necessary fire

hydrant and dust suppression systems.

Ignition temperature of coal: 260 deg F to 365 deg F

Typical label and MSDS information that contains particulars like Warning and safety

phrases such as ‘highly combustible’, etc., Physical and health hazards, Guidelines on

safe use, storage and transport, Spill control and clean up, First aid should be placed in

the area.

Coal Linkage and Transport to site

It is envisaged that the proposed station will be linked with Indian coal fields of coal

Indian / Imported coal and will be transported to the port of Dahej which has all the

facilities for large volume of coal handling. Imported coal will also be received at the

port. From the port the coal will be transported by trucks to the site.

8.5.1 Hazard Identification

Hazards in Coal Handling

• Exposure to coal dust in handling coal.

• Inhalation

• Ingestion

• Skin contact

• Eye contact

• Fall of object [Coal Pieces] while collecting spilled coal below running conveyors.

 

Draft EIA report for Narmada Thermal Power Limited 8-17  

Fire hazards in Coal Storage

• Self heating of coal to its ignition temperature, resulting in what is called

spontaneous combustion, is a phenomenon identified with coal storage in

industries. Virtually all grades of coal (except high grade anthracite) are

vulnerable to spontaneous heating and ignition. Although the precise cause of

the spontaneous combustion of coal is not well defined, it is believed that when

coal is freshly mined, the fresh surface of coal pieces liberate absorbed hydro-

carbons, chiefly methane (in varying amounts), After the escape of the absorbed

gases, the exposed surface of coal particles get oxidized by the oxygen in the

ambient air. The oxidation is very slow but heat is generated in the process. If

the heat is not allowed to dissipate, the temperature of the coal may rise

gradually but sufficiently enough to cause the mass to ignite. It is also believed

that this self heating of coal usually occurs in about 90 to 120 days after the coal

is extracted in mining operations.

• Oxidation in coal stacks takes place mainly from loosely packed coal stacks and

the consequent availability of oxygen in the voids of the stacks. The rate of

oxidation is high at the outer surface of the stacks because of the availability of

abundant oxygen there. The rise in temperature, however, cannot be detected

due to the dissipation of heat by air movement. This zone extends roughly up to

a depth of 0.5m. The situation beyond this zone, say up to a depth of 1.5m, is

different. The coal in this zone is also different. The coal in this zone also

oxidisers fairly rapidly in the presence of adequate quantity of air entering the

stack, but the heat generated in the course of this reaction is generally partially

dissipated through convection and conduction. The heat transfer from this zone

depends on factors like ambient temperature, rate of air movement around that

zone, free moisture available in the material and thermal conductivity. The

residual heat thus present in this zone further raises the temperature of the coal

mass until it attains the critical (threshold) temperature i.e. the auto ignition

temperature. Once it reaches critical temperature, the coal in the zone starts

burning and smoking and eventually erupts in flames. Proneness to spontaneous

combustion, therefore, can be determined by ascertaining the critical oxidation

temperature or crossing point. The lower the crossing point, the more is the

proneness to self heating.

• All types of coal, when exposed to the atmosphere, are liable to suffer

deterioration of quality through surface oxidation, but the extent of deterioration

differs from type to type. Lignite is a type of brown coal containing a high

percentage of volatiles. It is subject to weathering much more rapidly than

 

Draft EIA report for Narmada Thermal Power Limited 8-18  

bituminous coal. It contains a large percentage of moisture (as much as 40%) as

mined, of which nearly 20% exists even before it is mined. Under dry hot

ambient conditions, particularly in India where temperature in a shed could go up

to 450C and humidity to less than 30%, lignite oxidation rate could be high. The

rate of release of carbon monoxide which is indicative of the oxidation rate may

be as high as 70 m3 of CO per ton of lignite, which is about 100 times that of

normal bituminous coal. It has also been observed that in large coal storage

yards left undisturbed for long periods, smoldering takes place at the surface

layers of the pile. In case of lignite, this phenomenon is more rapid. Highly

volatile coal is particularly liable to spontaneous combustion.

Coal is highly combustible and the range of ignition temperature range for coal is 260-

365 degF.

Explosion hazard during coal storage:

Dust Explosion, an explosion caused by the sudden igniting of a mixture of air and a

heavy concentration of combustible dust particles. A mixture containing fine dust is more

explosive because there is more exposed particle surface.

The flame or spark that sets off a dust explosion can be produced by friction, static

electricity, matches, defective wiring, blowtorches, or any open flame. Dust composed of

grain, flour, starch, coffee, cotton, coal, sugar, or other organic materials is highly

explosive.

8.5.2 Risk Evaluation and Control Measures

Control measures to be adopted during storage of coal

Storage of large quantities of coal requires two conditions to be met viz. (i) avoidance of

deterioration in quality and (ii) avoidance of heating in the pile. While neither of the

conditions can be fulfilled completely, deterioration and risk of fire can be reduced to a

minimum by careful manipulation of the conditions of storage.

As basic necessary steps to avoid spontaneous heating in coal storage, the following

guidelines will be adopted:

• The ground or floor where coal is to be stored will be thoroughly cleaned of

leaves, grass, weds, pieces of wood, cotton waste or other organic waste and

precautions taken to prevent such matter from getting under, into or on the coal

pile.

• There will not be any steam or hot process pipelines or openings or sewers under,

into, through or adjacent to coal piles.

 

Draft EIA report for Narmada Thermal Power Limited 8-19  

• The storage site will be provided with drainage facility to prevent accumulation of

water on the ground.

• Special attention will be given to monitoring of the coal stack, in excess of 420C.

• The pile will be planned so as to facilitate dissipation of heat by wind from the

surface of the pile. Any barrier / obstruction to wind will be removed.

• Newly broken fines of coal are more susceptible to spontaneous heating.

Dropping coal from heights while piling will be avoided.

• Conical piles will be avoided - these storage will be built up in layers by roll

packing - this helps to exclude oxygen and thus prevents fires by discouraging

spontaneous heating.

• As far as possible coal piles from different sources will not be stored together.

• Coal stock should be limited in height. Low-grade coal will not be piled higher

than 3 meters and best grade not higher than 4-5 meters. Coal will be stored in

mixed sizes as too many fines will be hazardous.

• No standing timber or pipes, poles, etc. will be allowed in the piles. These may

give rise to formation of duct which allows sluggish air flow which may be

sufficient for heating the coal but not sufficient to dissipate the heat.

It is recommended to locate coal yards at least 6-7 meters away from any important

buildings and other combustible storage areas.

Control measures to be adopted for prevention of Coal Stock Fires

During the period of low off take, coal stock generally tends to build up to alarming

levels. Since most of the grades of coal are susceptible to spontaneous ignition if it is

undisturbed for a certain period of time, risk of fire exists in coal stacks. Following

precautions will be taken for preventing spread of coal stock fire:

• Consumption of coal will be done on first in-first out basis.(FIFO)

• Temperature of the coal pile will be checked regularly. Specific attention will be

given to the sloped sides of the piles where vulnerable air pockets exist. If pile

temperature exceeds 700C, the pile will be opened and placed the overheated

material in a separate small pile or use it promptly.

• Inspection of stack will be done to detect smoldering and organize removal /

consumption of the smoldering coal on priority and to extinguish the flames in

time. Such inspections are vital after the rains as water falling on the surface and

 

Draft EIA report for Narmada Thermal Power Limited 8-20  

penetrating the coal pile may aggravate and accelerate spontaneous heating by

assisting oxidation.

• Coal having high moisture content will be stored separately, if possible, and used

promptly.

• Continuous water sprinkle system is working in the coal shed yard and open area

to avoid Self heating of coal to its ignition temperature.

Resources:

• Availability of fire hydrant and spray system around the stack yard.

• Fire fighting tenders.

• Portable diesel fire fighting pump.

• Trained fire fighting personnel.

• Earth moving equipment (2 nos. dozers & one pay loader).

• 200 m of fire fighting hose along with different kinds of nozzles.

Procedure:

• On observation of emergency fire situation in coal stack yard CHP operation

engineer shall immediately report to ECC (Emergency Control Center).

• On receipt of communication from ECC all key personnel shall reach to designated

emergency control centre.

• Work incident controller shall ensure containing of the fire affected stack yard by

cutting of coal on either side of coal stack by means of available machinery such

as dozers.

• The coal so removed shall be transported to the unaffected portion of the stack

yard or adjacent stack yard.

• After ensuring complete isolation of the affected portion of stack yard, press

spray of water from water hydrant from all possible directions along with tenders.

Ensure quenching of flames and smoldering coal. Spontaneous hibernation of

steam from the quenched coal stack should not be a cause of worry, however

care to be exercised that persons involved in tackling the emergency does not get

hurt by the steam burst.

• Excess fire fighting water going through the drain shall be contained in the

holding pond and shall be released only after complete settling of coal in the

holding pond.

 

Draft EIA report for Narmada Thermal Power Limited 8-21  

• After containing the fire completely, press dozers in service and compact the coal

further. Reclaim the partially burnt coal at the earliest opportunity to bunker.

Other precautions:

Following precautions related to safety would be taken while installing the machine:

• It will be ensured that there is ready access to the Grease Nipple.

• Sufficient clearance will be kept between ground and discharge chutes for fitting of

discharge conveyor.

• It will be ensured that the side door is accessible and does not foul on surrounding

structure.

• V belts will be tightened as specified.

• A magnetic separator will be provided to avoid ingress of any non-crushable

material.

Like any other transmission machinery, belt conveyors present risk of injury. Experience

shows that conveyor accidents often involve fatal or very serious injuries and severe

damage to property.

• As conveyor systems are vital links in the production chain, their stoppage due to

accidents or breakdowns can lead to serious business interruption loss.

• In bulk material transportation systems, excessive spillage represents wastage of

material, and emission of dust can present occupational safety and health

problems.

• Most personal injury accidents with belt conveyors occur when hands of persons

are trapped in inadequately guarded nip points and pinch points near pulleys and

idlers.

• Mechanical failure of conveyor components due to deficiencies in design and

operational and maintenance procedures also render the conveyor systems

hazardous.

Spillage of materials, fires from friction, overheating, static charge and other electrical

sources are the other typical hazards encountered in belt conveyor systems.

Grounding and Lightning Protection

The grounding requirement of the power plant is divided into the following two main

categories:

• System grounding

 

Draft EIA report for Narmada Thermal Power Limited 8-22  

• Equipment grounding

The system grounding is adopted to facilitate ground fault relaying and to reduce the

magnitude of transient over-voltage. The system grounding involves primarily the

grounding of the generators and transformer neutrals. High impedance grounding is

envisaged for 13.8 kV system generator neutrals, which would be achieved through

neutral grounding Transformer. The 6.6kV system will be operated with medium

resistance grounded.

220kV and 415 V systems will be solidly grounded and the 220 V DC system will be

ungrounded.

The equipment body grounding (at least two numbers) is to be adopted to provide

protection to personnel and equipments from potentials caused by ground fault currents

and lightning discharges.

A stable ground grid will be provided for grounding of equipment and structures

maintaining the step and touch potentials within safe limits. An earth mat would be laid

in and around the power plant. This mat would be buried at a suitable depth

Below the ground and provided with ground electrodes at suitable spacing. All non-

current carrying metallic parts of equipment will be connected to the grounding mat.

Buildings, structures, transmission towers will also be connected to the grounding mat.

Lightning protection system will be installed for protection of the buildings / structures

and equipment against lightning discharge. This will be achieved by providing lightning

masts, down conductors on buildings/structures, towers in switchyard and connecting

these with ground grid.

Besides this, for outdoor equipment exposed to atmosphere, protection against lightning

surges will be provided with lightning surge arresters at suitable locations, over and

above the shielding wires and lightning masts to safeguard the equipment.

Lighting

The power station lighting system would comprise the following:

Normal 240 V AC Lighting System

The lighting circuit in the normal 240 V AC lighting system would be fed through

415/415 volts, 3 phase, 4 wire lighting transformers connected to a 415 V distribution

system.

Lighting transformers in each area in the power station would be fed from a convenient

415 V switchgear/MCC located nearby. About 20% of the lighting fixtures will be

 

Draft EIA report for Narmada Thermal Power Limited 8-23  

connected to receive emergency AC supply. During failure of normal AC supply, these

fixtures will be fed from emergency AC supply derived from the DG set.

Direct Current Emergency Lighting

Direct current emergency lights would be provided at strategic points in the power

station, viz., near entrances, staircases, the main control room, etc. These would be fed

from the station 220 V DC system and would be off when the normal AC power supply is

available. These would be automatically switched on when the normal AC supply fails.

The proposed illumination levels for various areas are given below:

Table 8.5: Illumination level

Sl. No. Area Illumination Level

1 Control room 300

2 Switchgear / MCC rooms 200 - 250

3 Power house 200

4 Outlying areas 50

5 Transformer yard & switchyard 10 - 20

6 Boiler area 50

7 Air/Gas compressors house, DM

plant

200

8 Workshop 300

9 Canteen 150

10 Stores 100-150

11 Parking area and cycle stand 70

12 Battery room 150

13 Cable vaults 100

14 Administration building 350

15 Roads 10

 

 

Draft EIA report for Narmada Thermal Power Limited 8-24  

8.6 RISK ANALYSIS DUE TO STORAGE AND HANDLING OF CHLORINE

Hazards in chlorine handling and storage

8.6.1 Health hazards data

Skin:

Liquid and gas are capable of causing a burn. Remove contaminated clothing under

shower.

Eyes:

Liquid and gas are capable of causing a burn. Immediate flush with water at least for 15

minutes. Use no oils or Chemical neutralizers. Obtain medical assistance promptly.

Inhalation:

Remove from contaminated area. If breathing has ceased start artificial respiration at

once. Obtain medical assistance.

Ingestion:

Not a likely occurrence. Vomiting should be induced.

8.6.2 Environmental protection procedures

Waste disposal methods:

Chlorine gas will disperse to the atmosphere leaving no residue. Neutralizing chemicals

are caustic soda solutions, soda ash Solution and lime solution.

Protective equipment:

Requires NIOSH approved self-contained breathing apparatus and may require a fully

encapsulated suit.

8.6.3 Special protection information

Ventilation recommended:

Sufficient to control below TLV or PEL. Chlorine will collect at the floor or ground level.

Exhaust systems must be designed accordingly. Absorption or scrubber systems are

recommended.

TLV Value for chlorine: 0.5 ppm

Glove type recommended:

Non-porous, i.e. neoprene, butyl or viton.

 

Draft EIA report for Narmada Thermal Power Limited 8-25  

Additional information:

Do not attempt to handle chlorine without previous training in Respiratory equipment for

toxic gases.

8.6.4 Transportation

Usual shipping containers:

Steel tank cars, tank trucks, ton containers, 100 and 150 pound cylinders.

Suitable storage materials/coatings:

Steel

Unsuitable:

Titanium, chrome, aluminum and reactive metals

Risk Control Measures for Chlorine Cylinders

The proposed power plant will store 3 number of 100 kg chlorine cylinders for raw water

chlorine applications. The following risk mitigation measures will be adopted during the

design phase

• Chlorine cylinders will be stored in an isolated air tight room.

• Project Proponent may consider installing fixed chlorine leak detectors. It may be

ensured that they are installed at a height of about 300mm from the ground

level, as chlorine is a heavy gas. In the event of any minor leaks chlorine detector

will activate the control valve to stop the chlorine supply to the main header.

• In order to minimize further consequences due to failure of chlorine detection and

control valve system it has been proposed to install automatic room ventilation

system which in turn should be coupled to an alkali scrubber to neutralize the

excess chlorine leaked in the chlorine tonner handling room

• Chlorine emergency kit may be procured and emergency team members trained

to use the same

• Self Contained Breathing Apparatus (SCBA) may be procured and emergency

response team members trained on the use of the same

• Eye wash fountain / emergency shower may be installed in the plant areas

• Electrical operated siren may be installed in the plant area to announce

emergency. Manually operated siren may also be provided as a back up.

• Emergency lighting (either connected to UPS or battery operated lights) may be

provided in critical plant areas

 

Draft EIA report for Narmada Thermal Power Limited 8-26  

8.7 RISK ANALYSIS DUE TO HSD AND LDO

8.7.1 Fire & Explosion Hazard:

Fire and explosion hazards at LDO terminals may result from the presence of flammable

gases and liquids, oxygen, and ignition sources during loading and unloading activities,

and / or leaks and spills of flammable products. Possible ignition sources include sparks

associated with the buildup of static electricity, etc.

Static electricity may be generated by liquids moving in contact with other materials,

including pipes and tanks during loading and unloading of product. Oils take longer to

dissipate electric charges and hence represent a higher risk of ignition from static

electricity.

As said earlier, LDO contains hydrocarbons which are volatile and can give off vapors.

Vapor may spread along the ground and collect in low or confined areas. May also travel

to a source of ignition and flash back. Vapors may form combustible mixtures with air at

temperatures at or above the flash point.

Fire & explosion hazard due to LDO increases in presences of strong oxidizing agents

such as peroxides, nitric acid and per chlorates as LDO is highly reactive to oxidizing

agents.

8.7.2 Health hazard data

Routes of entry

Inhalation, Skin absorption, ingestion

Effects of exposure / symptoms:

Excessive inhalation Vapors cause rapid breathing, excitability, staggering, headache,

fatigue, nausea and vomiting, dizziness,

Skin contact:

Skin-dryness, cracking, irritation eyes watering, stinging and inflammation. Emergency

treatment: In case of eye or Skin contact, flush with plenty of water. Remove

Soaked clothing in case of excessive inhalation move the victim to fresh air, obtain

medical Assistance.

8.7.3 Preventive measures

Personal protective equipment:

Canister type gas mask, PVC or Rubber, Goggles giving complete protection to eyes, Eye

wash fountain with safety shower should be used as PPE.

 

Draft EIA report for Narmada Thermal Power Limited 8-27  

Handling and storage precautions:

Do not expose to heat and naked lights, keep containers and valves closed when not in

use.

8.7.4 Emergency and first aid measures

Fire extinguishing media

Foam, Carbon dioxide, Dry Chemical Powder. Water may be used to cool fire-exposed

containers.

Unusual hazards:

It will spread along the ground and collect in sewers Exposure:

Skin contact: in case of contact with Skin flush with fresh water, remove containment

clothing.

Inhalation: in case of excessive inhalation move the victim to fresh air, If problem in

breathing give artificial respiration; give oxygen. Obtain medical assistance.

Ingestion: Give water to conscious victim to drink; do not induce vomiting.

Antidotes/Dosages: N.A.

Spills: Steps to be taken shut off leak, if safe to do so, .Keep non-involved people away

from spill site. Eliminate all sources of ignition. Prevent spill entering in to sewers, for

Major spillage contact Emergency services

Waste Disposal method: N.A.

8.8 RISK ANALYSIS FOR ASH HANDLING SYSTEM

8.8.1 Various ash discharge point in a FBC boiler are as below:

Convection bank / Economizer / Air heater / Electro static precipitator

Hopper will be provided below all these discharge points. For controlling the dust

emission in the plant due to fly-ash discharge, dense phase ash handling is envisaged. In

this system ash will be mixed with pressurized air and ash will be discharged in an ash

silo where ash and air will be separated out. Then ash will be loaded in the transport

vehicle and will be disposed of for cement plant.

8.9 OCCUPATIONAL HEALTH AND SAFETY

The Proposed plant where multifarious activities are involved during construction, erection,

testing, commissioning, operation and maintenance, the men, materials and machines are

the basic inputs. Along with the boon, the industrialization generally brings several

problems like occupational health and safety.

 

Draft EIA report for Narmada Thermal Power Limited 8-28  

The following occupational health and safety issues are specific to proposed plant

activities:

• Physical hazards

• Heat and hot liquids

• Respiratory hazards

• Electrical hazards

• Noise

• Entrapment hazards

• Fire and explosions

Physical Hazards

Industry specific physical hazards are discussed below.

Potential physical hazards in proposed plant are related to handling of raw materials and

product; heavy mechanical transport (e.g. trucks) and work at heights (e.g. platforms,

ladders, and stairs).

Heavy Loads / Grinding & Cutting / Rolling

Lifting and moving heavy loads at elevated heights using hydraulic platforms and cranes

presents a significant occupational safety hazard. Recommended measures to prevent

and control potential worker injury include the following;

• Clear signage in all transport corridors and working areas;

• Appropriate design and layout of facilities to avoid crossover of different activities

and flow of processes;

• Implementation of specific load handling and lifting procedures, including:

• Description of load to be lifted (dimensions, weight, position of center of gravity)

• Specifications of the lifting crane to be used (maximum lifted load, dimensions)

• Train staff in the handling of lifting equipments and driving mechanical transport

devices.

• The area of operation of fixed handling equipment (e.g. cranes, elevated

platforms) should not cross above worker and pre-assembly areas;

• Material and product handling should remain within restricted zones under

supervision;

 

Draft EIA report for Narmada Thermal Power Limited 8-29  

• Regular maintenance and repair of lifting, electrical, and transport equipment

should be conducted. Prevention and control of injuries related to grinding and

cutting activities, and use of scrap, include the following:

• Locate machine-tools at a safe distance from other work areas and from

walkways;

• Conduct regular inspection and repair of machine-tools, in particular protective

shields and safety devices / equipment;

• Train staff to properly use machines-tools, and to use appropriate personal

protection equipment (PPE).

Heat and Hot Liquid

High temperatures and direct radiation are common hazards in industries. High

temperatures can cause fatigue and dehydration. Direct radiation also poses a risk to

sight. Potential contact with hot water may occur from the cooling zone, from splashes of

hot material and from contact with hot surfaces. Recommended measures for prevention

and control of exposure to heat and hot liquids / materials include the following:

• Shield surfaces where close contact with hot equipment or splashing from hot

materials is expected;

• Implement safety buffer zones to separate areas where hot materials are handled

or temporarily stored. Rail guards around those areas should be provided, with

interlocked gates to control access to areas during operations;

• Use appropriate PPE (e.g. insulated gloves and shoes, goggles to protect against

radiation, and clothing to protect against heat radiation);

• Install cooling ventilation to control extreme temperatures;

• Implement work rotations providing regular work breaks, access to a cool rest

area, and drinking water.

Respiratory Hazards

Insulation Materials

Recommended management practices include:

• Damaged or friable material should be repaired or removed while other materials

may be monitored and managed insitu. Any handling of insulation materials

deemed to contain asbestos or any other hazardous material should only be

performed by properly trained and certified contractors and personnel following

internationally accepted procedures for their repair or removal;

 

Draft EIA report for Narmada Thermal Power Limited 8-30  

Dust and Gas

Dust is generated in storage and handling of raw material storage. In the melting

process high temperature operations are conducted, workers may be exposed to gas

inhalation hazards.

Recommendations to prevent exposure to gas and dust include the following:

• Design facility ventilation to maximize air circulation. Outlet air shall be filtered

before discharge to the atmosphere;

• Exhaust ventilation should be installed at the significant point sources of dust and

gas emissions;

• Provide a sealed cabin with filtered air conditioning if an operator is needed in a

contaminated area;

• Provide separated eating facilities that allow for washing before eating;

• Provide facilities that allow work clothes to be separated from personal clothes,

and for washing / showering after work;

• Implement a policy for periodic health checks.

Respiratory hazard control technologies should be used when exposure cannot be

avoided with other means, such as manual operations such as grinding or use of

non-enclosed machine-tools; and during specific maintenance and repair

operations. Recommendations for respiratory protection include the following:

• Use of filter respirators when exposed to heavy dust;

• For light dust and gases, fresh-air supplied respirators should be used.

Alternatively, a complete facial gas mask (or an “overpressure” helmet) may be

used, equipped with electrical ventilation;

• For carbon monoxide (CO) exposure, detection equipment should be installed to

alert control rooms and local personnel. In case of emergency intervention in

areas with high levels of CO, workers should be provided with portable CO

detectors, and fresh-air supplied respirators.

Electrical Hazards

Workers may be exposed to electrical hazards due to the presence of heavy-duty

electrical equipment.

 

Draft EIA report for Narmada Thermal Power Limited 8-31  

Noise

Raw and product material handling as well as the production processes themselves may

generate excessive noise levels.

Entrapment

Risk of entrapment may occur in storage areas and in particular during maintenance

operation (e.g. inside large mineral hopper). Measures to prevent burials include the

following:

• Ensure proper containment wall for mineral heaps;

• Ensure distance between heaps and transit way;

• Develop and adopt specific safety procedures for working inside hoppers (e.g.

verification systems / procedures to stop refilling belt and to close refilling hole);

• Train staff to make stable heaps and to follow procedures.

Explosion and Fire Hazards

Coal is susceptible to spontaneous combustion due to heating during natural oxidation of

new coal surfaces. Coal dust is combustible and represents an explosion hazard in coal

handling facilities.

Recommended techniques to prevent and control explosion risks due to coal dust storage

include the following:

• Coal storage times should be minimized;

• Coal piles should not be located above heat sources such as steam lines or

manholes;

• Covered coal storage structures should be made of non-combustible materials;

• Storage structures should be designed to minimize the surface areas on which

coal dust can settle, and dust removal systems should be provided;

• Ignition sources should be kept to an absolute minimum, providing appropriate

equipment grounding to minimize static electricity hazards. All machinery and

electrical equipment inside the storage area or structure should be approved for

use in hazardous locations and provided with spark-proof motors.

8.10 OTHER HAZARDS AND ITS CONTROLS

The other hazards possible at site are as given below:

 

Draft EIA report for Narmada Thermal Power Limited 8-32  

Table 8.6: Other Hazards and Its Controls

Name of

possible

hazard or

emergency

Its source &

reason

Its effects on

person, property &

environment

Place of effect Control measures

provided

Building

collapse

Earthquake

• Any natural

Calamities

• Week

structure

• Over

loading

• Injuries &

Fatalities

• Building damage.

• All building &

sheds of the

company as

given in the

Fac. layout

• Structure stability

is by competent

person for all

structure.

• No overloading of

structures and

building.

Electrical

Installation

failure like

Transformer,

PCC etc.

• Overload

Loose

contacts

Short circuit

• Fire

• Suffocation of

persons inside the

plant

• Electrical

transformer

switch yard

• Electrical

MCC rooms

• Power plant

• Installation as per

electricity rules.

• Other Controls

provided

• Rubber mat

provided

• Earthing provision

8.11 AUTOMATIC FIRE DETECTION AND CONTROL MEASURES

General

The fire fighting system shall be designed as per TAC (Tariff Advisory Committee)

guidelines. The plant's fire protection shall consist of structural solutions, fire

extinguishing systems and fire alarm systems. The fire extinguishing system shall consist

of the fire water system with fire pumps distribution pipelines, hydrants and fire hoses

and the portable extinguishers.

The fire alarm system is a part of the primary systems and shall take care of the places

which are unmanned or do not have any fixed fire extinguishing system.

8.11.1 Fire water / hydrant system

Fire pumps

There shall be two fire pumps, one electric and one diesel engine driven. The pumps

supply water for the fire line and the fixed fire extinguishing systems. Either of these

 

Draft EIA report for Narmada Thermal Power Limited 8-33  

centrifugal pumps can alone deliver the required amount of water. At the rated flow, the

pressure produced by the pumps shall be adequate, at least 7 bars by the rated flow,

and at a zero flow not exceed 10 bar.

Diesel Engine

Diesel engine shall be equipped with an approved automatic auxiliary starting device

having a sufficient capacity for at least six starts of fire pump. The diesel pump shall

have a fuel tank containing sufficient fuel to enable the pump to run on full load for at

least three hours.

Jockey Pumps

An electric motor driven jockey pump of requisite capacity will maintain automatically

system pressure in the fire line. If the jockey pump can not keep the pressure the fire

pumps shall come into action automatically by the pressure drop. The fire pumps are

stopped manually.

Operation of all the fire pumps shall be automatic. Pressure switches located in the fire

water main shall sense sudden drop of pressure below set point, due to opening of any

hydrant valves, which shall provide the starting signal to the fire pumps. For stopping of

the pumps only manual arrangement shall be provided.

The run and fault alarms from the fire pumps are led to the control room. The pumps will

be located in pump house which shall be constructed by purchaser based on input from

supplier.

Toxic Gas Detector

There is no toxic gas exposure is envisaged from the proposed project hence no detector

envisages. However natural gas leakage detectors will be installed at different locations

in the premises.

Fire Water Storage Tank

The water for fire-fighting shall be stored in the fire water tank. The water capacity of

the Fire Fighting Water tank shall be 500 KL and is as per statutory requirement.

Water distribution system

Fire piping shall be of MS Class “C” with supports for above ground lines. For

underground piping GI class “C” pipes with necessary fittings will be used. The piping will

be externally painted. The codes IS1239/IS 3589 will be followed. All underground pipes

shall have cathodic protection. Sufficient number of isolation valve shall be provided to

isolate the area in case of maintenance. The diameter of the fire pipes shall be sufficient

 

Draft EIA report for Narmada Thermal Power Limited 8-34  

for the effective use of at least two fire hoses. The pipes and hydrants will be so placed

that the fire hoses may be easily coupled to them.

Hydrants

Hydrant type Fire Protection System essentially shall consist of a network of piping and

hydrant valves- both indoor & outdoor. The distance between any two hydrants will not

be more than 45 meters. Each hydrant will be provided with a hose cabinet (mounted

along side the hydrant on a steel column, lockable type) containing two nos. of 15 M

long hoses and branch pipes/nozzles. For multi-stored building located alongside engine

hall, a wet riser tapped off from the hydrant main, shall be provided for each stair case

inside the stair case and on this riser hydrant outlet with first aid hose reel connection

shall be provided on each floor. Each hydrant shall be provided with a wall/column

mounted on hose cabinet containing two nos. of hose and branch pipe/nozzle.

The number and position of the hydrants shall be such that spray from at least two

hoses with combined jet and water fog nozzles may reach any part of the hall or

auxiliary room and spray from one combined jet and water fog nozzles may reach any

part of other places. A hydrant unit inside the power house shall consist of two hose

couplings of size DN50, both equipped with a shutoff valve. There will be two couplings

beside each other to make it possible to use the water hose and mobile foam unit

simultaneously. Some hydrants shall also to be installed on an external wall, to allow the

use of hoses outside a building.

Fire hoses shall be cotton and nylon jacket seamless woven and rot proofed material

equipped with quick couplings and adjustable water fog nozzles. Hose couplings and

nozzles throughout the fire line shall be completely interchangeable. Hose couplings shall

be made of a copper alloy or other approved material.

Hose length : 15 m

Hose diameter : 63 mm

Busting pressure test : 32 kg/cm2

Fire department connections

The fire water line will be provided with a fire department connection to allow additional

water supply from fire department. It consist of a check valve, a pipe between the fire

water line after the fire pump and outside wall and 3 inches hose connections on the

outside wall.

 

Draft EIA report for Narmada Thermal Power Limited 8-35  

8.11.2 Fire Alarm And Detection System

The fire alarm and detection centre shall be located in the control room. Manual call

points shall be installed at critical points and escape routes. Manual alarms shall set off

by breaking a glass disk and pressing a button.

The fire detection system shall comprise of smoke and heat detectors. The fire detection

system shall be installed through out the power plant and shall at least cover the

following areas: engine hall, auxiliary area, and switchgear room, gas receiving cum

compression station, offices, stores, control rooms, workshop, and hazardous areas. The

preferable choice of type of indicators shall be as mentioned below.

Engine hall and auxiliary area

Following extinguishing and protection system shall be provided all over the engine hall

and auxiliary area. Fixed heat or flame detectors used in power plants shall be

differential maximum heat detectors with the following activation criteria:

Limit temperature : 58 deg C

Maximum temperature rise : 1000C per minute

Type of detectors suggested for various sections are as under:

Table 8.7: Type of detectors

Sr.

no.

Section Type of detectors

1 LV/MV Switch gear & switchyard room Ionization / Optical smoke detectors

2 Offices, pantry, corridor, toilet and

changing rooms

Ionization / Optical smoke detectors

3 Control room Ionization / Optical smoke detectors

4 Workshop Heat alarm system

5 Fire Pump House Ionization / Optical smoke detectors

6 Black start unit container Ionization / Optical smoke detectors

7 Gas receiving cum compressor house Ionization / Optical smoke detectors

8 Security Room Ionization / Optical smoke detectors

9 Radiator MCC room Ionization / Optical smoke detectors

10 Siren A siren with minimum range of 300

m in addition to flashing lights &

 

Draft EIA report for Narmada Thermal Power Limited 8-36  

alarm bells shall be provided in DG

building.

8.12 SAFETY ORGANIZATION AND ITS ACTIVITIES

8.12.1 Construction and Erection Phase

A qualified and experienced safety officer will be appointed. The responsibilities of the

safety officer includes identification of the hazardous conditions and unsafe acts of

workers and advise on corrective actions, conduct safety audit, organize training

programs and provide professional expert advice on various issues related to

occupational safety and health. He is also responsible to ensure compliance of Safety

Rules/ Statutory Provisions. In addition to employment of safety officer by Plant, every

contractor, who employs more than 250 workers, will also employ one safety officer to

ensure safety of the worker, in accordance with the conditions of contract.

8.12.2 Operation and Maintenance Phase

When the construction is completed the posting of safety officers would be in accordance

with the requirement of Factories Act and their duties and responsibilities would be as

defined there of.

8.12.3 Strengthening of HSE and Meeting by Safety and quality circle

In order to fully develop the capabilities of the employees in identification of hazardous

processes and improving safety and health, safety and quality circles would be

constituted in area of work. The circle normally will meet for about an hour fortnight.

8.12.4 Safety Training

A full fledged training center will be set up at the plant. Safety training would be

provided by the Safety Officers with the assistance of faculty members called from

Corporate Center, Professional Safety Institutions and Universities. In addition to regular

employees, limited contractor labors would also be provided safety training. To create

safety awareness safety films would be shown to workers and leaflets would be

distributed. Some precautions and remedial measures proposed to be adopted to

prevent fires are:

• Compartmentation of cable galleries, use of proper sealing techniques of cable

passages and crevices in all directions would help in localizing and identifying the

area of occurrence of fire as well as ensure effective automatic and manual fire

fighting operations;

 

Draft EIA report for Narmada Thermal Power Limited 8-37  

• Reliable and dependable type of fire detection system with proper zoning and

interlocks for alarms are effective protection methods for conveyor galleries;

• House keeping of high standard helps in eliminating the causes of fire and regular

fire watching system strengthens fire prevention and fire fighting; and Proper fire

watching by all concerned would be ensured.

• Tie up will be made with emergency services like local fire station, hospitals,

emergency van etc during operation phase. The emergency telephone numbers

will be displayed at different points within the plant premises and at the entry exit

gates.

8.13 HEALTH AND SAFETY MONITORING PLAN

All the potential occupational hazardous work places would be monitored regularly for air

quality, noise level and illumination level (during day and night). The health of

employees working in these areas would be monitored once in a year for early detection

of any ailment due to exposure to hazardous chemicals. First aid centres and medical

centre should be provided. Transportation arrangement should be provided in case of

emergency.

8.13.1 Do’s and Don’ts checklist

Do’s:

Preventive maintenance:

1) Prepare preventive maintenance schedule for all major equipments. 2) Ensure that preventive maintenance is carried out as per schedule. 3) Identify persons who will carry out preventive maintenance. 4) Provide necessary training to those persons to carry out preventive maintenance

safely and effectively. 5) Mention due date for preventive maintenance on each equipment. 6) In form concern department prior to start preventive maintenance. 7) Wear proper PPE’s prior to start preventive maintenance.

Strengthening of HSE:

1) Appoint safety personnel for safety related activities. 2) Form safety committee to review safety related issues and recommend to higher

management for implementation. 3) Periodic health checkup for the employees. 4) Ensure proper lighting inside work premises. 5) Provide proper sign boards for PPE’s 6) Implement proper submit system s to carry out hot work in flammable area and

work at height.

 

Draft EIA report for Narmada Thermal Power Limited 8-38  

Mfg and utility staff for safety related measures:

1) Mfg and utility staff should provide proper training for operations to be carried out.

2) Adequate number of PPE’s to be provided to mfg and utility staff. 3) Ensure proper super vision in mfg and utility areas.

Don’ts:

Preventive maintenance:

1) Don’t start preventive maintenance without proper PPE. 2) Don’t start preventive maintenance without approval of concern department.

Strengthening of HSE:

1) Don’t allow smoking inside the premises 2) Don’t allow person without shoes inside the plant area. 3) Don’t allow to run vehicle above speed limit inside the premises.

Mfg and utility staff for safety related measures:

1) Don’t allow unknown person in plant area without permission.

 

Draft EIA report for Narmada Thermal Power Ltd. 9-1

Chapter 9 Disaster Management Plan

9.1 GENERAL

Disaster is an undesirable happening of such magnitude and nature, which can

adversely affect man, material and environment. Risk assessment forms an integral

part of “Disaster Management”. Any major or a number of minor failures could lead

to an accident taking a heavy toll of human life and affecting the production

target considerably.

Disaster management has assumed significant role in the gas based power plant

operations. Disasters are major accidents, which cause wide spread disruption of

human and commercial activities. Disaster can be defined as a sudden

occurrence of impacts of greater magnitude to affect normal pattern of life in the

plant and/or vicinity, causing extensive damage to life and property. Normally, the

community absorbs common accidents, but disasters are major accidents and

community cannot absorb within its own resources. Most of the disasters, natural or

technological (man-made) have sudden onset and give very short notice or no time to

prevent the occurrence.

Disaster has the potential to cause serious injury or loss of life, both inside and

outside the works. It would normally require the assistance of outside emergency

services to handle it effectively. Although the emergency may be caused by a number

of different factors, e.g. plant failure, human error, earthquake, vehicle crash or

sabotage etc., it will normally manifest itself in power plant operation as three basic

forms: fire, explosion or toxic release.

It is therefore, necessary to ensure safety and reliability of any new plant, through a

systematic study of industrial installations to identify possible failures and prevent their

occurrence before the disasters.

9.2 PURPOSE AND SCOPE OF DMP

In carrying out the preliminary Risk Analysis, the stress is given to Maximum Credible

Accident (MCA) analysis and the resulting DMP include the following:

• On-Site Emergency Plan

• Off-site Emergency Plan

• Safety Review Check Plan

• Accident Reporting

Draft EIA report for Narmada Thermal Power Ltd. 9-2

9.3 CAUSES OF DISASTER

Disastrous incident could be a local one causing damage to plant, equipment and

material only or additionally affecting the persons working in the plant/industry or if

more serious, affecting the neighboring environment including human population. The

first two categories can be termed as “On- site Emergency” and the last one as an “Off-

site Emergency”. There are number of factors that can be considered as causes for

disastrous situation or emergencies.

A good process technology has to be engineered properly by following accepted

standards in design, if the hazards are to be minimized. Improper sizing of plant and

equipment, inadequate schemes, faulty choice of material of construction may lead to

unsafe conditions. Risk evaluation, Hazard analysis and Hazard & operability will be

emphasized made mandatory when engineering the proposed project.

9.4 DISASTER CONTROL PHILOSOPHY

The principal strategy of Disaster Management Plan of proposed project is prevention of

the identified major hazards. And since these hazards can occur only in the event of

loss of containment, one of the key objectives of technology selection, project

engineering, construction, commissioning and operation is Total and Consistent Quality

assurance. It is committed to this philosophy right from the conceptual stage of the

proposed project. The second control strategy adopted for potential emergencies is

minimization of operation inventories of hazardous substances both in process plants as

well as in storage limits of viability of continuous operation. In the proposed power plant

there is no storage of natural gas. The gas will be procured through pipeline from the

nearest available sources.

And another control measure that will be adopted is early detection of any accidental

leak and activation of as well structured, resourced and rehearsed Off -Site Emergency

Plan to intercept the incident with speed and ensure safety to employees, operating

plants, public and environment as a matter of priority.

9.5 DISASTER CONTROL PLAN

Design stage considerations:

For the proposed power plant major emergency situation can arise mainly from fire in

coal storage area, leakage in HSD and risk due to accidental chlorine leakage. From

the analysis of the vulnerable zones the following actions will be taken during design

stage:

Draft EIA report for Narmada Thermal Power Ltd. 9-3

Chlorine Storage

• Chlorine installations will be sited at a sufficient distance (25 m minimum)

from public roads to reduce the risk of in the event of an accident.

• Protective barriers will be installed wherever necessary.

• The chlorine unloading area will be on reasonably level ground with adequate

surrounding space providing good access from different directions.

• Adequate lighting covering all escape routes will be provided and the provision

of emergency lighting will be also available.

• Automatic Chlorine gas leak detectors will be provided.

• The chlorine pipeline in the area will be properly routed so as to minimize the

risk of damage from collision by the tanker, other vehicle or mobile equipment.

• Leakage of liquid chlorine are potentially more dangerous than leaks of

gaseous chlorine, hence the proper storage system will designed so that sources

of leakage of liquid are reduced to a minimum.

• All liquid chlorine storages will be installed in a bund, which is impervious to liquid

chlorine. The bund should be capable of taking the contents of the largest single

storage. Sump will be connected to an alkali scrubber to provided

neutralization in an event of emergency. Provision will be provided for

removal of rain water over bund wall, through valves in the bund.

• In an event of toxic release from the tonner all the people within 550 m of the

prevailing wind direction will be advised to run perpendicular to the wind

direction.

• Adequate means will be provided for evacuation of the critical segment of the

population to a safer place.

• Maintenance personnel will be equipped with protective equipment’s to minimize

the risk of exposure in case of an accident.

Coal storage:

• Air circulating within a coal pile should be restricted as it contributes to heating;

compacting helps seal air out.

• Moisture in coal contributes to spontaneous heating because it assists the

oxidation process and should be limited to 3%.

Draft EIA report for Narmada Thermal Power Ltd. 9-4

• Coal having high moisture content should be segregated and used as quickly as

possible. Efforts should be made to keep stored coal from being exposed to

moisture.

• Dry coal shall be kept dry and shall be not exposed to any rain during storage

period. This concerns what is known as the heat-of-wetting;

• Drying coal is an endothermic process [heat is absorbed] and lowers the

temperature of the coal. Wetting (or gaining moisture) is an exothermic process

and the liberated heat can accelerate the spontaneous heating of the coal.

• Following the "first in, first out" rule of using stock reduces the chance for hot

spots by helping preclude heat buildup for portions of stock which remain

undisturbed for a long term. The design of coal storage bins is important in this

regard.

• A high ambient temperature aids the spontaneous heating process.

• Use coal as quickly as practicable. The longer large coal piles are allowed to sit,

the more time the spontaneous process has to work.

• The shape and composition of open stockpiles can help prevent fires. Dumping

coal into a big pile with a trestle or grab bucket can lead to problems. Rather,

coal should be packed in horizontal layers, which are then leveled by scraping and

compacted by rolling. This method helps distribute the coal evenly and thus

avoids breakage and segregation of fine coal. Segregation of coal particles by size

should be strenuously avoided, as it may allow more air to enter the pile and

subsequent heating of finer sizes.

• Properly inspect, test and maintain installed fire protection equipment.

• Maintain an update pre-fire plan and encourage regular visits to coal facilities by

the site or local emergency response force.

9.6 FIRE FIGHTING ARRANGEMENT

Fire detection and fire fighting systems were discussed in detail in chapter 8 in section

8.11.

Fire Services Personnel

Fire service shall be manned by trained fire safety personnel. Fire services department

shall have adequate number of safety equipment for use during emergency. The list of

safety appliances is as follows:

Gas Mask

Canisters Alkali Suit

Draft EIA report for Narmada Thermal Power Ltd. 9-5

Asbestos Suit

Fire Proximity Suit

BA Set

Electric Gloves (for 15000 volts)

Hydraulic Tool

Telephone

Emergency Ladder, etc.

9.7 SAFETY AND PERSONAL PROTECTIVE APPLIANCES

Safety and personal protective appliances shall be provided in adequate numbers and

shall be distributed in different sections according to requirement. A list of such

appliances available in the plant is given in the Table 9.1.

Table 9.1: List of Proposed Safety Equipment

Sl.No. Equipment Nos. GAS MASK 01. Carbon Monoxide Adequate Nos. 02. Chlorine - do - BREATHING APPARATUS 01. Compressed Air - do - 02. Airline respirator - do - OTHERS 01. Pneupac Resuscitator - do - 02. Combustible gas indicator/explosimeter - do - 03. Gas Detector (Dragger Pump) - do - 04. Safety Belts - do - 05. Alkali/Acid Suit - do - 06. Asbestos Suit - do - 07. Hand Gloves etc. - do - 08. Gum Boots - do - 09. Safety Shoes - do - 10. Eye Goggles - do -

9.8 EMERGENCY ACTION PLAN

The emergency action plan consists of:

• First information;

• Responsibilities of Work Incident Controller;

• Responsibilities of Chief Incident Controller;

• Responsibilities for Declaration of Emergency;

• Responsibilities for Emergency Communication Officer;

• Responsibilities of key personnel;

Draft EIA report for Narmada Thermal Power Ltd. 9-6

• Responsibilities and action to be taken by essential staff and various teams during

emergency; and

• Responsibilities for All Clear Signal.

9.8.1 First Information

The first person who observes/identities the emergencies will inform by shouting and by

telephone to the Shift Engineer and Fire Station about the hazard. The Shift Engineer will

inform to Works Incident Controller, Chief Incident Controller and also telephone

operator, who shall communicate it to all key personnel.

9.8.2 Responsibilities of Work Incident Controller (WIC)

The Work Incident Controller on knowing about an emergency immediately will rush to

the incident site and take overall charge and inform the same to Chief Incident Controller

(Chief Executive). On arrival, he will assess the extent of emergency and decide if major

emergency exists and inform the communication officer accordingly. His responsibilities

will be to ensure compliance to the duties listed below.

9.8.3 Responsibilities of Chief Incident Controller (CIC)

The Chief Executive, who is also the Chief Incident Controller, will assume overall

responsibilities for the factory/storage site and its personnel in case of any emergency.

His responsibilities are to:

1. Assess the magnitude of the situation and decide if staff needs to be evacuated from

their assembly point to identified safer places. Declare on-site/off-site emergency.

2. Exercise direct operational control over areas other than those affected.

3. Undertake a continuous review of possible developments and assess in consultation

with key personnel as to whether shutting down of the plant or any section of the plant

and evacuation of personnel are required.

4. Laison with senior officials of Police, Fire Brigade, Medical and Factories Inspectorate

and provide advice on possible effects on areas out side the factory premises.

5. Look after rehabilitation of affected persons on discontinuation of emergency.

6. Issue authorized statements to news media, and ensures that evidence is preserved for

inquiries to be conducted by the statutory authorities.

9.8.4 Responsibilities For Declaration Of Major Emergency

• Making the emergency known inside the plant

Draft EIA report for Narmada Thermal Power Ltd. 9-7

The major emergency will be made known to everyone inside the plant by blowing the

alarm. Separate alarms to warn different types of major emergencies such as fire and

explosion or toxic gas escape are provided. Public address system is also available

throughout the plant.

Announcement will be made by the concerned official/interpreter in local language.

Similarly announcement for termination of the emergency will also be announced.

9.8.5 Responsibilities of Emergency Communication Officer (ECO)

On hearing the emergency alarm he will proceed to Emergency Control Center. He will:

• Report to Chief Incident Controller and Work Incident Controller and maintain

contact with them.

• On information received from the WIC of the situation, recommending if

necessary, evacuate the staff from the assembly points.

• Identify suitable staff to act as runner or messenger who is listed in the Essential

staff, between him and the Works Incident Controller if the telephone and other

system of communication fail due to any reason.

• Maintain inventory of items in the emergency control center.

• Contact local meteorological office to receive early notification of changes in

weather condition in case of gas leak and prolonged action.

• Maintain a log of incidents.

• Keep in constant touch with happenings at the emergency site and with WIC

9.8.6 Key Personnel

Apart from Works Incident Controller and Chief Incident Controller, other works

personnel will have key role to play in providing advice and in implementing the

decisions made by the Chief Incident Controller. The key personnel include:

A. Sr. Supdts./Engineer-in-charge responsible for

• Operation

• Electrical Maintenance

• Mechanical maintenance

• C&I

• Chemical

B. Head of Personnel and Officers connected with IR and Labour Welfare

C. Head (Technical Service)

Draft EIA report for Narmada Thermal Power Ltd. 9-8

9.8.7 Responsibilities of Key Personnel

• Department Heads

The departmental heads will provide assistance as required. They will decide which

members of their departments are required at the incident site.

• Chief Personnel Manager

He will:

a) Report to Work Incident Controller;

b) Ensure that all non-essential workers in the affected areas are evacuated to assembly

points in consultation with the Chief Incident Controller;

c) Receive reports from nominated persons from assembly points, and pass on the

absence information services;

d) Keep liaison with other coordinators to meet the requirements of services such as

materials, security management, transportation, medical, canteen facilities etc. as

required during emergency;

e) Be in constant touch with the Chief Incident Controller and feed him correct information

of the situation;

f) Give information to press, public and authorities concerned on instructions from the

CIC/WIC;

g) Ensure that casualties receive adequate attention at medical center and arrange

required additional help and inform relatives of the injured;

h) Arrange to inform public on Radio and TV about evacuation etc.; and

i) Arrange TV coverage on handling emergency.

• In-Charge

On knowing about an emergency, he will report to CIC and assist him in all activities. He

will also liaison with all teams.

• Medical Officer

Medical Officer will render medical treatment to the injured and if necessary will shift the

injured to nearby Hospitals. He will mobilize extra medical help from outside if

necessary.

• Safety Officer

On hearing the Emergency alarm he will proceed to main entrance/main gate. He will:

Draft EIA report for Narmada Thermal Power Ltd. 9-9

a. Make sure that all safety equipment are made available to the emergency teams;

b. Arrange to control the traffic at the gate and the incident area;

c. Direct the security staff to the incident site to take part in emergency operations under

his guidance and supervision;

d. Evacuate the persons in the plant or in the nearby areas as advised by WIC after

arranging the transport through the Transport in-charge;

e. Allow only those people who are associated with handling emergency;

f. Maintain law and order in the area, if necessary seek the help of police; and

g. Maintain communication with CIC/WIC and ECO.

• Fire Officer

On hearing the emergency, he will reach the fire station and arrange to sound the alarm

as per the type of emergency in consultation with WIC, He will:

a. Guide the fire fighting crew i.e. firemen and trained plant personnel and shift the fire

fighting facilities to the emergency site. Adequate facilities will be made available;

b. Take guidance of the WIC for fire fighting as well as assessing the requirement of

outside help;

c. Maintain communication with WIC, CIC and ECO.

• Transport -in-Charge

On hearing the emergency alarm he will immediately report to WIC. He will:

a. Ensure availability of auto base vehicles for evacuation or other duties, when asked for;

and

b. Make all arrangements regarding transportation.

9.9 EMERGENCY CONTROL CENTRE

An emergency control centre shall be provided at a safe place from where Chief

Emergency Co-ordinator shall function for ON-SITE emergency. The Emergency Control

Centre (ECC) shall be provided with following;

• Adequate number personal protective equipment,

• Alarm and communication network (Siren, local as well as P&T Telephone, Public

Address system etc.),

• Route map,

Draft EIA report for Narmada Thermal Power Ltd. 9-10

• Map of the factory & surrounding areas, evacuation routes, fire hydrant network

and other important information

• Details of fire hydrant system

• Copy of detailed Disaster Management Plan, where names, telephone numbers of

the response team members and their responsibilities are clearly written as well

as names and telephone numbers of key personnel from outside agencies and

district authorities, Fire Station, nearby Hospitals and doctors should be made

available.

• First aid kit,

• Material safety data sheets of chemicals

Assembly Point

Assembly points shall be set up near to the likely hazardous event sites where pre-

designated persons from the disaster response team should assemble and meet the

Site Incident controller. This may be regarded as Site Incident Control Room where

Incident Controller will receive instruction and furnish information to the Chief

Emergency coordinator. The site incident control room shall be provided with efficient

communication system, adequate personal protective equipment, copy of Disaster

Management Manual etc.

Emergency Shelter

Emergency shelter places shall be chosen sufficiently away from likely affected site.

Employees who are not in the emergency management team shall be asked to take

shelter. The place is chosen such that the employees taking shelter are not affected by

fire, explosion and release of toxic gases. More than one emergency shelter shall be

designated so that proper shelter point can be chosen depending on wind direction and

other factors.

Wind Socks

Windsocks shall be provided on the top of tall buildings to indicate the wind direction.

Fire Station

A fire station with fire water tender shall be provided.

Draft EIA report for Narmada Thermal Power Ltd. 9-11

Figure 9.1: On-site Emergency Plan

9.10 OFF-SITE EMERGENCY PREPAREDNESS PLAN

The task of preparing the Off-Site Emergency Plan lies with the district collector; however

the off-site plan will be prepared with the help of the local district authorities. However, it

can be observed from the risk modeling that the damage contours will be within the plant

boundary and therefore on-site emergency plan has more significance. The off-site

emergency preparedness plan should be based on the following guidelines. Off-site

emergency plan follows the on-site emergency plan. When the consequences of an

emergency situation go beyond the plant boundaries, it becomes an off-site emergency.

Off-site emergency is essentially the responsibility of the public administration. However,

the factory management will provide the public administration with the technical

information relating to the nature, quantum and probable consequences on the neighboring

population.

SITE CONTROLLER EMERGENCY CONTROL ROOM

SAFETY OFFICER INCIDENT

CONTROLLER (Production)

EMERGENCY COORDINATOR

(Rescue, Fire Fighting)

EMERGENCY COORDINATOR

(Medical, Mutual aid, Rehabilitation, Transport

& Communication)

EMERGENCY COORDINATOR

(Essential Services)

SHIFT IN-CHARGE

SHIFT IN-CHARGE

INCIDENT CONTROLLER

(Utilities, Stores etc)

SHIFT IN-CHARGE

OPERATOR OPERATOR ELECTRICIAN, PUMP OPERATOR

ELECTRICIAN, PUMP OPERATOR

FIRST AID, TRANSPORT-DRIVER,

TELEPHONE-OPERATOR

Draft EIA report for Narmada Thermal Power Ltd. 9-12

The off-site plan in detail will be based on those events, which are most likely to occur, but

other less likely events, which have severe consequence, will also be considered. Incidents

which have very severe consequences yet have a small probability of occurrence should

also be considered during the preparation of the plan. However, the key feature of a good

off-site emergency plan is flexibility in its application to emergencies other than those

specifically included in the formation of the plan.

The roles of the various parties who will be involved in the implementation of an off-site

plan are described below. Depending on local arrangements, the responsibility for the off-

site plan should be either rest with the works management or, with the local authority.

Either way, the plan should identify an emergency co-ordinating officer, who would take the

overall command of the off-site activities. As with the on-site plan, an emergency control

center should be setup within which the emergency co-ordinating officer can operate.

An early decision will be required in many cases on the advice to be given to people

living "within range" of the accident - in particular whether they should be evacuated or

told to go indoors. In the latter case, the decision can regularly be reviewed in the event

of an escalation of the incident. Consideration of evacuation may include the following

factors:

a. In the case of a major fire but without explosion risk only houses close to the fire

are likely to need evacuation, although a severe smoke hazard may require this to

be reviewed periodically;

b. If a fire is escalating and in turn threatening a store of hazardous material, it might

be necessary to evacuate people nearby, but only if there is time; if insufficient time

exists, people will be advised to stay indoors and shield themselves from the fire;

c. For release or potential release of toxic materials, limited evacuation may be

appropriate down wind if there is time. The decision would depend partly on the

type of housing "at risk". Conventional housing of solid construction with windows

closed offers substantial protection from the effects of a toxic cloud, while shanty

house, which can exist close to factories, offer little or no protection.

The major difference between releases of toxic and flammable materials is that toxic clouds

are generally hazardous down to much lower concentrations and therefore hazardous over

greater distances. Also, a toxic cloud drifting at, say 300 m per minute covers a large area

of land very quickly. Any consideration of evacuation should take this into account.

Although the plan will have sufficient flexibility built in to cover the consequences of the

range of accidents identified for the on-site plan, it will cover in some detail the handling of

the emergency to a particular distance from each major hazard works.

Draft EIA report for Narmada Thermal Power Ltd. 9-13

9.10.1 Aspects proposed to be considered in the Off-Site Emergency Plan

The main aspects, which will be included in the emergency plan, are:

• Organization

Details of command structure, warning systems, implementation procedures, emergency

control centers. Names and appointments of incident controller, site main controller, their

deputies and other key personnel.

• Communications

Identification of personnel involved, communication center, call signs, network, and lists of

telephone numbers.

• Specialized knowledge

Details of specialist bodies, firms and people upon whom it may be necessary to call e.g.

those with specialized chemical knowledge, laboratories.

• Voluntary organizations

Details of organizers, telephone numbers, resources etc.

• Chemical information

Details of the hazardous substances stored or procedure on each site and a summary of the

risk associated with them.

• Meteorological information

Arrangements for obtaining details of whether conditions prevailing at the time and

whether forecasts.

• Humanitarian arrangements

Transport, evacuation centers, emergency feeding treatment of injured, first aid,

ambulances and temporary mortuaries

• Public information

Arrangements for (a) dealing with the media press office; (b) informing relatives, etc.

• Assessment of emergency plan

Arrangements for: (a) collecting information on the causes of the emergency; (b) reviewing

the efficiency and effectiveness of all aspects of the emergency plan.

Draft EIA report for Narmada Thermal Power Ltd. 9-14

9.10.2 Role of the Emergency Co-ordinating Officer

The various emergency services should be coordinated by an emergency co-ordinating

officer (ECO), who will be designated by the district collector. The ECO should liase closely

with the site main controller. Again depending on local arrangements, for very severe

incidents with major or prolonged off-site consequences, the external control should be

passed to a senior local authority administrator or even an administrator appointed by the

central or state government.

9.10.3 Role of the Local Authority

The duty to prepare the off-site plan lies with the local authorities. The emergency planning

officer (EPO) appointed should carry out his duty in preparing for a whole range of different

emergencies within the local authority area. The EPO should liase with the works, to obtain

the information to provide the basis for the plan. This liaison should ensure that the plan is

continually kept upto date.

It will be the responsibility of the EPO to ensure that all those organizations which will be

involved off site in handling the emergency, know of their role and are able to accept it by

having for example, sufficient staff and appropriate equipment to cover their particular

responsibilities. Rehearsals for off-site plans should be organized by the EPO.

9.10.4 Role of Police

Formal duties of the police during an emergency include protecting life and property and

controlling traffic movements.

Their functions should include controlling bystanders evacuating the public, identifying the

dead and dealing with casualties and informing relatives of death or injury.

9.10.5 Role of Fire Authorities

The control of a fire should be normally the responsibility of the senior fire brigade officer

who would take over the handling of the fire from the site incident controller on arrival at

the site. The senior fire brigade officer should also have a similar responsibility for other

events, such as explosions and toxic release. Fire authorities in the region should be

appraised about the location of all stores of flammable materials, water and foam supply

points and fire-fighting equipment. They should be involved in on-site emergency

rehearsals both as participants and, on occasion, as observers of exercises involving only

site personnel.

9.10.6 Role of Health Authorities

Health authorities, including doctors, surgeons, hospitals, ambulances and so on, will have

a vital part to play following a major accident and they will form an integral part of the

Draft EIA report for Narmada Thermal Power Ltd. 9-15

emergency plan. For major fires, injuries should be the result of the effects of thermal

radiation to a varying degree and the knowledge and experience to handle this in all but

extreme cases may be generally available in most hospitals. For major toxic releases, the

effects vary according to the chemical in question, and the health authorities should be

apprised about the likely toxic releases from the plant which will unable then in dealing with

the aftermath of a toxic release with treatment appropriate to such casualties.

Major off-site incidents are likely to require medical equipment and facilities additional to

those available locally and a medical “mutual aid “scheme should exist to enable the

assistance of neighboring authorities to be obtained in the event of an emergency.

9.10.7 Role of Government Safety Authority

This will be the factory Inspectorate available in the region. Inspectors are likely to want to

satisfy themselves that the organization responsible for producing the off-site plan has

made adequate arrangements for handling emergencies of all types including major

emergencies. They may wish to see well documented procedures and evidence of exercise

undertaken to test the plan.

In the event of an accident, local arrangements regarding the role of the factory inspector

will apply. These may vary from keeping a watching brief to a close involvement in advising

on operations in case involvement in advising on operations. In cases where toxic gases

may have been released, the factory inspectorate may be the only external agency with

equipment and resources to carry out tests. The off-site emergency organization chart for

major disaster is shown below:

Draft EIA report for Narmada Thermal Power Ltd. 9-16

Figure 9.2: Off-Site Emergency Plan

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Draft EIA report for Narmada Thermal Power Ltd. 9-17

9.11 SAFETY & EMERGENCY PLAN

Safety of both men and material during construction and operation stages is of

concern to industries. The preparedness of an industry for the occurrence of possible

disasters is known as emergency plan. The disaster in power plant may occur due to

leakage of hazardous chemicals like chlorine, collapse of structures and fire/explosion

etc. Keeping in view the safety requirements during construction, operation and

maintenance phases, and the gas based power plant would formulate safety policy with

respect to the following requirements:

• To allocate sufficient resources to maintain safe and healthy conditions at work.

• To take steps to ensure that all known safety factors are taken into account

in the design, construction, operation and maintenance of plants, machinery and

equipment.

• To ensure that adequate safety instructions are given to all employees.

• To provide wherever necessary protective equipment, safety appliances and

clothing, and to ensure their proper use.

• To inform employees about materials, equipment or processes used in their work,

which are known to be potentially hazardous to health or safety.

• To keep all operations and methods of work under regular review for making

necessary changes from the point of view of safety in the light of experience and up

to date knowledge.

• To provide appropriate instruction, training, retraining and supervision in health

and safety, first aid and to ensure that adequate awareness is given to these

matters.

• To ensure proper implementation of fire prevention and an appropriate firefighting

service together with training facilities for personnel involved in this service.

• To ensure that professional advice is made available wherever potentially

hazardous situations exist or might arise.

• To organize collection, analysis and presentation of data on accident, sickness

and incident involving personal injury or cause of sickness with a view to taking

corrective, remedial and preventive action.

• To promote through the established machinery, joint consultation in health and

safety matters to ensue effective participation by all employees.

• To publish/notify regulations, instructions and notices in the common language of

employees.

Draft EIA report for Narmada Thermal Power Ltd. 9-18

• To prepare separate safety rules for each type of occupation/process involved in a

power station.

• To ensure regular safety inspection by a competent person at suitable intervals

of all buildings, equipment, work places and operation

9.12 PRE-EMERGENCY ACTIONS

The proposed preventive and pre-emptive measures are as follows:-

• Ensure implementation of Disaster Planning.

• Ensure that all drafted for emergency undergo regular training and are prepared

for tackling emergency/disaster.

• Ensure that Mock Drills are performed under simulated emergency condition at

regular intervals to assess the strength and weaknesses of the response team/plan.

• Ensure awareness among employees through regular training.

• Ensure good liaison with all agencies and industries in the neighborhood for getting

help if situation arises.

• Ensure adequate stock of safety, personal protective appliances in good working

condition.

• Ensure awareness amongst public in the neighboring areas.

• Medical Services

The doctors in the nearby hospitals should be trained for treatment of personnel affected

by chlorine gas leakage. Necessary apparatus and drugs should also be available in first

aid post and in State Hospitals and also other Nursing Homes nearby. Manager (HR-

Welfare) should have good liaison with authorities of nearby hospitals and Nursing

Homes as well as doctors outside so that help may be available when required. Qualified

safety officer and medical officer will be appointed.

9.13 TRANSPORT AND COMMUNICATION

Ambulance Van will be available inside power plant premises. The disaster management

cell will have the contact number of nearby hospitals or nursing home with Ambulance

facility to call them in case of emergency.

 

 Draft EIA for Narmada Thermal Power Limited 10-1  

Chapter-10 Summary & Conclusion

The proposed plant is located at Survey no.134,135A,135B,137,138, Village: Padaria,

Taluka: Vagra, District: Bharuch, Gujarat. The site is approachable by the site is well

connected through an existing village road to the state Highway.

10.1 LAND AVAILABILITY AND REQUIREMENT

The project is proposed to be located in about 122 acres of land located at Survey

no.134,135A,135B,137,138, Village: Padaria, Taluka: Vagra, District: Bharuch, Gujarat.

10.2 FUEL REQUIREMENT, STORAGE & HANDLING SYSTEM

Coal shall be used as major fuel. The detail of fuel consumption along with its source is

given in the table below:

Table 10.1: Raw material details

FUEL Quantity Source Transportation

Indian Coal 1.53 million TPA From Indian mines Road Network by

Trucks/ Tankers.

Imported coal 1.144 million TPA From Indonesian

mines

Transport through Dahej

port via NH 8A & SH 50

LDO/HSD 2010 KL HPCL / IBPL Road Network by Road

tankers.

10.3 WATER AVAILABILITY AND REQUIREMENT

Water requirements of the project will be met through Luwara Branch canal by Sardar

Sarovar Narmada Nigam Ltd.

10.4 ENVIRONMENT IMPACT ASSESSMENT STUDY

In order to identify the impacts due to construction and operation of Narmada Thermal

Power Limited and draw an Environmental Management Plan, a detailed Environmental

Impact Assessment (EIA) Study has been undertaken through M/S Detox Corporation

Private Limited, Surat. The environmental disciplines studied include meteorology, air

quality, water quality and water use, soils, land-use, demography and socio-economics, and

noise. The study was conducted during summer season (March 2011 to May 2011).

 

 Draft EIA for Narmada Thermal Power Limited 10-2  

10.5 ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION MEASURES

10.5.1 Land Use:

The proposed site, comprising of 122 acre of land and is without any human settlement. The

proposed site where the plant is to be located has been presented in the Google earth map

in chapter 1, Figure 1.1, page 1-5 of the report.

10.5.2 Water Use and Hydrology:

Project proponent will draw its entire water requirement for the project from Luwara Branch

canal by Sardar Sarovar Narmada Nigam Ltd.

10.5.3 Demography and Socio-economics:

The proposed site is located in rural area without any human settlement. There will be no

displacements and no problems related to Rehabilitation and Resettlement. However project

would create the employment opportunity for the local community which inturn lead to

socio-economic development of the region.

10.5.4 Air Quality

The maximum predicted incremental ground level concentrations (GLCs) for particulate

matter, SOx and NOx will be 3.025 μg/m3, 3.979 μg/m3 and 2.474 μg/m3 respectively in

North West direction.

The incremental concentration for and NOx and SOx will be at distance of 2.692 Km and

that for Particulate matter will be at distance of 1.118 Km.

10.5.5 Water Quality

While developing the water system for the project, utmost care has been taken to maximize

the recycle/ reuse of effluents and minimize effluent quantity. The effluents from main plant

cooling tower blow down (Boiler Blow down and DM Plant Regeneration Waste) shall be fully

treated and will be reused.

10.5.6 Noise:

The major noise generating sources during the construction phase are vehicular traffic,

construction equipment like, dozer, scrapers, concrete mixers, cranes, generators, pumps,

compressors, rock drills, pneumatic tools, vibrators etc. The operation of these equipments

will generate noise ranging between 75 - 90 dB (A).

However, workers within the construction area and plant area may be affected due to high

noise levels. Adequate protective measures in the form of ear- muffs / ear plugs/ masks

 

 Draft EIA for Narmada Thermal Power Limited 10-3  

shall be provided to such persons, which will minimise / eliminate such adverse impacts. In

addition, reduction in noise levels shall also be achieved through built-in design

requirements to produce minimum noise, proper lay out design, adding the sound barriers,

use of enclosures with suitable absorption material etc. Provision of green belt and

afforestation will further help in reducing the noise levels.

10.6 DISASTER MANAGEMENT PLAN

The EIA Report includes a Disaster Management Plan covering elements of emergency

planning like organization, communication, coordination, procedure, accident reporting,

safety review checklist, on-site emergency plan and off-site emergency plan. A Disaster

Management Plan (DMP) for the project has already been prepared and to be implemented

for the proposed project, specifying responsibilities at various levels to be discharged in case

of an emergency. The DMP at site shall be strengthened suitably based on recommendation

of DMP included in EIA Report.

10.7 PROJECT BENEFITS

The major project benefits are as mentioned below:

• Increase in employment opportunity in skilled, semi-skilled and un-skilled

categories.

• Increase in employment/ self employment avenues in service sector.

• Development of support infrastructure such schools, roads improve the

livelihood and social status of the local peoples

For the proposed project, the project proponent is committed to implement social

welfare measures as part of Corporate Social Responsibility plan as the part of the

proposed project and has proposed to implement various community development

programs.

10.8 ENVIRONMENT MANAGEMENT PLAN

An Environment Management Plan for Construction and operation phases of the project has

been prepared. An Environment Management cell shall be created to strengthen and

monitoring of the implementation of the environmental management plan for the project.

10.9 ENVIRONMENT MONITORING PLAN

The main attributes for which monitoring shall be carried out are as below:

1. Ambient air Quality

 

 Draft EIA for Narmada Thermal Power Limited 10-4  

2. Stack Emission

3. Wastewater Quality

4. Noise Level

Conclusions:

Based on the above, it has been concluded that by adopting a robust environmental

management plan and risk mitigation measures as presented in the EIA report, the

proposed project would exhibit very insignificant environmental impacts. However, the

implementation of proposed massive plantation, green belt area and community

development programs under CSR activities would bring significant positive impacts to the

entire region.

Hence it is being requested to State Expert Appraisal Committee, Gujarat for considerations

of awarding Environmental Clearance for the project as per the provisions of EIA Notification

and its amendments there on.

Draft EIA report for Narmada Thermal Power Limited 11-1

Chapter 11 Disclosure of Consultants

11.1 GENERAL INFORMATION

Name of Organization : Detox Corporation Pvt. Ltd.

Address : 3rd Floor, K.G. chambers, Udhna Darwaja, Ring

road, Surat- 395 002

Telephone Nos. : +91-261- 2351248 ,2326181

Fax : +91-261- 2354068

Email : [email protected]

11.2 VISION AND BUSINESS ETHICS

“Company’s long established philosophy – to provide QUALITY SERVICES through integrated

Environmental Solutions delivered within the client’s schedule. “

11.3 KEY FACTS

1995 Laid Foundation Stone of Firm. Activities covered fabrication & equip. supply

1997 Developed Turnkey execution.

1997 Developed core competence for conducting Environment Audits.

1998 Developed a Full Fledged Laboratory

1998 Construction of ETP’s & STP’s

2000 Developed core competence for preparation of EIA Study Reports

2002 Expansion and Modernization of Lab & Office.

2004 Certified for ISO 9001: 2000 (QMS)

2004 Established First Branch Office at Gandhidham, Kutch

2005 Tie up with Ozmotech, Australia for Converting Waste Plastic to Diesel

2006 Foundation laid for setting up a Total Hazardous Waste Management site at

Kutch, Gujarat

11.4 ACCREDITATIONS & REGISTRATIONS

• ISO 9001-2000 certification through DLIQ Certification affiliated to JAZ –ANZ of

Australia.

• NABL (National Accreditation Board for Testing & Calibration) Certificate No: T-

1635,validity 16/07/2011

Draft EIA report for Narmada Thermal Power Limited 11-2

• NRBPT (National Registration Board for Personnel & Training ) Accreditation No: EIA

92 007 validity May 20, 2012 provided provisional accreditation in 9 sectors

• MoEF registered laboratory

• GPCB enlisted Consultants & Auditors

• NSIC – CRISIL rating

11.5 ACTIVITES

11.6 EIA TEAM

The EIA Team engaged in the preparation of EIA report consist of professionals with

multidisciplinary skill and relevant experience required for undertaking this project..

Following are the specific roles and responsibilities of the key team members:

DE TOX

Techno-legal EIAs Environmental Audits ISO-14001(Internal

Audit)

• Baseline Study • Monitoring & Sampling

Laboratory Analytical Services

Hazardous waste site STPs, ETPs MSW Site APC measures

• Ozmotech Pty. Ltd (Australia) • Fly Ash Management

(Hazel berg)

STPs , ETPs Incinerators Hazardous Waste

Site MSW Site

Draft EIA report for Narmada Thermal Power Limited 11-3

Table 11.1 : EIA team members

PERSONNEL NAME QUALIFICATION KEY

RESPONSIBILITY

AREA

EXPERIENCE

Mr. Chetan Contractor B.E. Mechanical Team Leader 26

Mr. Pushpak Shah M.E. (Civil), Environment Reviewer 9

Dr. Manoj Eledath M.Sc., Ph.D (Biosciences) Ecologist 21

Dr. Jessica Karia M.Sc., Ph.D (Application of

Remote Sensing in forest

cover monitoring)

RS-GIS Specialist 9

Dr. Bhavna Mehra Bioscience Ecologist and

laboratory support

10

Mr. Jitendra Khasakia B.E. Chemical Laboratory analysis-

Water

15

Mr. Amit Renose M.Sc. Chemist Laboratory analysis-

Air

12

Mr. Mitesh Desai B.E Chemical Risk assessment &

Disaster Management

Plan

12

Ms. Ankita Bhairaviya M.Sc. Environment Team member 3

Mr. Dayesh Parmar M.Sc. Physics Team member 7

Mr. Shabdendu Pathak B.Sc. Agriculture

technology

M.Sc. Environmental

management

Team member 4

Annexure 1

Lay out map

Annexure 2

Letter from DoEF regarding CRZ applicability