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ECO CHEM SALES & SERVICES

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Date : 16.04.2019

VALIDATION CERTIFICATE

This is to certify that we have validated the EIA report prepared by M/s. Oswal

Smelters Pvt. Ltd, Anantpur, Andra Pradesh for expansion project of Ferroalloys

manufacturing facility at Sy. No. 31-1, 2, 3, 32-1A, 2B, 37-2, 38-1, 2 & 48-1, Village

Gollapuram, Hindupur Mandal, District Ananthapuram, Andhra Pradesh.

We are Accredited by NABET- QCI as EIA Consultant Organization for Matallurgical

Industries (ferrous & non-ferrous) and under Schedule 3 (a) - Category ‘A’.

We have gone through the report in depth and verified the technical data. The EIA

report is adequate and found to be in line with the ToR issued by MoeFCC for the

project and as per the EIA Notification 2006 and its amendments.

Thanking you,

Yours truly,

FOR ECO CHEM SALES & SERVICES

REKHA SHAH (CHIEF EXECUTIVE OFFICER)

1

Impact on Air Quality

OSPL will provide 4 tall stacks for each of the proposed furnaces to exhaust the flue gas

emissions. The major pollutants emitted from the unit will be particulate matter, and oxides of

nitrogen. The hot gases released from the furnace will be of high temperature. OSPL proposes

to install Gas Cleaning Plant for controlling dust emission. The hot gas emitted from the furnace

will be conditioned by using radiant coolers to reduce the temperature before entering the

GCP.

Scenario 1: Impact on Air quality with Air Pollution Control Device

The flue gases with a temperature of about 130 oC will be deducted in the Bag filter designed

for an outlet concentration of less than 50 mg/Nm3. The details of emission considered for

estimation of impacts are given below in Table 1.

Table 1: Emission Details of Proposed Furnace

Particular Details

No. of stacks 4

Height of stack (m) 30

Diameter of stack (m) 1.5

Temperature of flue gas (oC) 130

Velocity of flue gas (m/s) 18

Volumetric Flow Rate (Nm3/sec) 23.5

Particulate matter at outlet of bag filter

(gm/sec/stack) (@ 50mg/Nm3 at outlet ) 1.18

Sulphur Dioxide Emission (gm/sec/stack) -----

Oxides of Nitrogen (gm/sec/stack) 2.35

Stack Height Estimation

OSPL has 1 tall stack of 30 m height each for effective dispersion of flue gas emissions and

proposing additional 3 Nos. of stacks for 3 x 12.5 MVA units.

Stack Emissions Input Data to the Model

Industrial Source Complex Short Term (ISCST3) regulatory model recommended by United

States Environmental Protection Agency (USEPA) has been used for predicting the incremental

concentrations of PM and NOx form the proposed plant activities. ISCST3 is capable of

modeling multiple sources in simple and complex terrain.

ISCST3 calculates ground level and elevated ambient concentrations or deposition from stack,

volume and/ or area sources. The steady-state Gaussian plume equation for a continuous

Point 1

2

source is used to calculate ground level concentrations for stack.

Input parameters required for ISCST3 are given below:

X and Y co-ordinates for the source

Source strength in terms of g/sec for NOx and PM

Height of the stack in meters

Temperature of the exit gas in degree Kelvin

Exit velocity of the gas in m/sec

Diameter of the stack in meters

Meteorological parameters such as hourly data for wind direction, wind speed, mixing

height and atmospheric stability class

The air pollution modeling carried out represents the worst case operating scenarios. The

pollutants considered for modeling include NOx and Particulate Matter.

Meteorological Data

The meteorological data recorded continuously during the months of March 2018 to May 2018

on hourly basis on wind speed, wind direction and temperature has been processed to

extract the 24 – hourly mean meteorological data as per the guidelines of IMD and MoEFCC

for application of ISCST3 model. Stability classes computed for the mean hours are based on

guidelines issued by CPCB on modeling. Mixing heights representative of the region have been

taken from the available published literature. The hourly meteorological data recorded at site

is converted to the mean hourly meteorological data as specified by CPCB and the same has

been used in the mode. In absence of site-specific mixing depths, mixing depths published in

“Spatial Distribution of hourly Mixing Depths over Indian Region” by Mr. R.N. Gupta and

recommended by CPCB have been used.

Model Employed

Prediction of cumulative ground level concentration due to emissions from the proposed

project has been computed using EPA approved ISCST3 model.

Application of ISCST3 for Prediction of Ground Level Concentration

ISCST3 Model with the following options has been employed to predict the ground level

concentration due to emissions from the proposed project in the Ferro alloy plant.

Areas being rural, rural dispersion parameters are considered.

Predictions have been carried out to estimate concentration values over radial distance of

10 km around the sources

Emission rates from the point sources and area sources were

3

considered as constant and during the entire period.

Consideration of settling velocity of the particles

The ground level concentrations computed were as is basis without any consideration of

decay coefficient.

Calm winds recorded during the study period were also taken into consideration

24 hourly (for 24 – hour mean meteorological data as per guidelines of IMD and MoEFCC)

mean ground level concentrations were estimated for the winter season using the mean

meteorological data of March 2018 to May 2018.

Emission Sources Considered for Simulations

Emissions from the 1 X 9 MVA and 3 x 12.5 MVA Submerged electric Arc furnaces have been

considered for prediction of impacts.

Maximum Ground Level Concentrations:

Ground level concentrations of PM and NOx were estimated using the mean meteorological

data to project the incremental increase of concentration above baseline concentrations due

to emission from the project.

The resultants values are compared with National Ambient Air Quality Emission (NAAQE)

Standards issued by Ministry vide G.S.R no. 826(E) dated November 16, 2009. Figure 1 and

Figure 2 represents the spatial distribution of the predicted ground level concentrations of PM,

and NOx due to emissions from the proposed project expansion.

Post Project Scenario

Maximum ground level concentrations are predicted considering 24-hourly mean

meteorological data of during March 2018 to May 2018, superimposed on the maximum

baseline concentrations obtained during the study period to estimate the post project scenario

which would prevail at the post operations phase.

The Overall Scenario with predicted concentrations over the maximum baseline

concentrations is shown below.

Table 2: Overall Scenarios within Study Area

24 Hourly

Concentrations

Particulate Matter (PM)

(µg/m3)

Oxides of Nitrogen (NOx)

(µg/m3)

Baseline Scenario (Max) 70.8 23.9

Predicted Ground Level

Concentration (Max)

3.73 4.87

Overall Scenario 74.53 28.77

NAAQ Standards 100 80

4

Figure 1: Ground Level Concentrations of Particulate Matter

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Figure 2: Ground Level Concentrations of NOx

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Scenario 2: Impact on Air quality all 4 stacks without Air Pollution Control Device

The flue gases with a temperature of about 150 oC will be for an outlet concentration of less

than 60000 mg/Nm3. The details of emission considered for estimation of impacts are given

below in Table 3.

Table 3: Emission Details

Particular Details

No. of stacks 4

Height of stack (m) 30

Diameter of stack (m) 1.5

Temperature of flue gas (oC) 150

Velocity of flue gas (m/s) 18

Volumetric Flow Rate (Nm3/sec) 22.42

Particulate matter at outlet (gm/sec/stack) (@

60000 mg/Nm3 at outlet ) 1345

Table 4: Overall Scenarios within Study Area

24 Hourly Concentrations Particulate Matter (PM) (µg/m3)

Baseline Scenario (Max) 70.8

Predicted Ground Level Concentration (Max) 2585

Overall Scenario 2655.8

NAAQ Standards 100

Scenario 3: Impact on Air quality all 3 stacks without Air Pollution Control Devices and Single

with APC

The flue gases with a temperature of about 150 oC for 3 Stacks and 130 0C for single stack will

be for an outlet concentration of less than 60000 mg/Nm3and 50 mg/Nm3.The details of

emission considered for estimation of impacts are given below in Table 5.

Table 5: Emission Details

Particular Details Details

No. of stacks 3 1

Height of stack (m) 30 30

Diameter of stack (m) 1.5 1.5

Temperature of flue gas (oC) 150 130

Velocity of flue gas (m/s) 18 18

7

Volumetric Flow Rate (Nm3/sec) 22.42 23.5

Particulate matter at outlet

(gm/sec/stack) 1345 1.18

Table 6: Overall Scenarios within Study Area

24 Hourly Concentrations Particulate Matter (PM) (µg/m3)

Baseline Scenario (Max) 70.8

Predicted Ground Level Concentration (Max) 1939

Overall Scenario 2009.8

NAAQ Standards 100

Scenario 4: Impact on Air quality all 2 stacks without Air Pollution Control Devices and 2

Stacks with APC

The flue gases with a temperature of about 150 oC for 2 Stacks and 130 0C for 2 stacks will be

for an outlet concentration of less than 60000 mg/Nm3and 50 mg/Nm3.The details of emission

considered for estimation of impacts are given below in Table 5.

Table 7: Emission Details

Particular Details Details

No. of stacks 2 2

Height of stack (m) 30 30

Diameter of stack (m) 1.5 1.5

Temperature of flue gas (oC) 150 130

Velocity of flue gas (m/s) 18 18

Volumetric Flow Rate (Nm3/sec) 22.42 23.5

Particulate matter at outlet

(gm/sec/stack) 1345 1.18

Table 8: Overall Scenarios within Study Area

24 Hourly Concentrations Particulate Matter (PM) (µg/m3)

Baseline Scenario (Max) 70.8

Predicted Ground Level Concentration (Max) 1293

Overall Scenario 1363.8

NAAQ Standards 100

8

Scenario 5: Impact on Air quality all 1 stacks without Air Pollution Control Devices and 3

Stacks with APC

The flue gases with a temperature of about 150 oC for 1 Stacks and 130 0C for 3 stacks will be

for an outlet concentration of less than 60000 mg/Nm3and 50 mg/Nm3.The details of emission

considered for estimation of impacts are given below in Table 5.

Table 9: Emission Details

Particular Details Details

No. of stacks 1 3

Height of stack (m) 30 30

Diameter of stack (m) 1.5 1.5

Temperature of flue gas (oC) 150 130

Velocity of flue gas (m/s) 18 18

Volumetric Flow Rate (Nm3/sec) 22.42 23.5

Particulate matter at outlet

(gm/sec/stack) 1345 1.18

Table 10: Overall Scenarios within Study Area

24 Hourly Concentrations Particulate Matter (PM) (µg/m3)

Baseline Scenario (Max) 70.8

Predicted Ground Level Concentration (Max) 647

Overall Scenario 717.8

NAAQ Standards 100

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Point 2