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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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6
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