Chapter - 3 Description of Environment
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Environmental Impact Assessment Report Angel Industries, for Proposed Resin Manufacturing Unit Survey No.: 127, Village: Devkaran Na Muvada, Taluka: Dahegam, District: Gandhinagar, Gujarat. CHAPTER - 3 DESCRIPTION OF ENVIRONMENT EIA METHODOLOGY FOR DATA COLLECTION It is very important part of base line data collection is an effective methodology and impact prediction to develop an efficient environment management plan. In this regard, it is important to understand the ground realities of the site and surrounding by the experts involved in preparation of EIA. Accordingly, a team of expert visited the proposed site to understand the site surrounding and possible impacts from the activities of the proposed project. The EIA coordinators in consultation with the respective functional area experts selected the sampling locations as per the TORs prescribed by the EAC. Subsequently, the base line monitoring was undertaken during March 2016 to May 2016 by T. R. Associates Laboratory. The collected data were analysed and interpreted. 3.1 AIR ENVIRONMENT Dispersion of different air pollutants released into the atmosphere have significant impacts on the neighborhood air environment of an industrial project and forms an important part of impact assessment studies. The ambient air quality status with respect to the study zone of 10 km radial distance from the plant site will form the base line information over which the predicted impacts due to the proposed plant can be super imposed to find out the net (Final) impacts on air environment. From the final impacts a viable Environmental Management Plan (EMP) can be prepared based on the impact statement for the air environment. The baseline status of the ambient air quality can be assessed thorough scientifically designed ambient air quality monitoring network. The design of monitoring network in the air quality surveillance program has to be based on the following considerations. Meteorological conditions on synoptic scale. Topography of the study area. Representation of regional background levels. Representation of plant site. Representation of cross sectional distribution in the downward direction. Influence of the existing sources if any, are to be kept at minimum. Inclusion of major distinct villages to collect the baseline status. T. R. Associates, Ahmedabad, Gujarat Chapter-3: Description of Environment 3.1 Environmental Impact Assessment Report Angel Industries, for Proposed Resin Manufacturing Unit Survey No.: 127, Village: Devkaran Na Muvada, Taluka: Dahegam, District: Gandhinagar, Gujarat. 3.1.1 Micrometeorological Data Micro-meteorological data within the project area during the air quality survey period is an indispensable part of air pollution study. The meteorological data recorded during survey period is very useful for proper interpretation of the baseline information as well as serves as an input, to predictive models for air quality impacts. To understand meteorological scenario primary generated and secondary data collected. This data is used in the interpretation of wind scenario. The data collected from the both sources are summarized as follows: Table 3.1.1 Meteorological Data Collection Period Primary data (March 2016 to May 2016): Parameters like Wind speed and its direction, Temperature, Humidity and Precipitation collected for project site using Automatic Weather Station at >10 m height. Meteorological data Secondary data (March 2015 to May 2015): Secondary data has been collected from the nearest IMD source (Ahmedabad) for temperature, Humidity, Rainfall, wind speed, wind direction & Cloud cover. 3.1.1.1 Meteorological Data from IMD, Ahmedabad (Secondary Data March 2015 to May 2015:) As per the historical data (IMD), collected (Ahmedabad for the above mentioned year 2015), the daily maximum temperature recorded in the month of May (44.60C) and the daily minimum temperature were recorded in the month of March (13.8oC). Similarly the maximum humidity levels was recorded in the month of March (90 %) and the minimum humidity levels recorded in the month of April (80 %). The maximum mean wind speed (6 km/hr) in the month of April & May, where the minimum mean wind speed (5 km/hr) was recorded in the month of March. Table No 3.1.2 Monthly Mean values of Meteorological Data (Secondary Data) Air Temperature °C Humidity % Mean Wind Month Max. Min. Max. Min. Speed kmph March 2015 41.5 13.8 90 17 5 April 2015 43.3 20.0 80 11 6 May 2015 44.6 24.1 84 12 6 T. R. Associates, Ahmedabad, Gujarat Chapter-3: Description of Environment 3.2 Environmental Impact Assessment Report Angel Industries, for Proposed Resin Manufacturing Unit Survey No.: 127, Village: Devkaran Na Muvada, Taluka: Dahegam, District: Gandhinagar, Gujarat. Source: as per IMD station, Ahmedabad (2015) The monthly mean values of meteorological data are shown in the form of wind rose in Fig. 3.1.1. Figure 3.1.1: Wind Rose Diagram for Secondary data collected from IMD – Ahmedabad (March 2015 to May 2015) T. R. Associates, Ahmedabad, Gujarat Chapter-3: Description of Environment 3.3 Environmental Impact Assessment Report Angel Industries, for Proposed Resin Manufacturing Unit Survey No.: 127, Village: Devkaran Na Muvada, Taluka: Dahegam, District: Gandhinagar, Gujarat. 3.1.1.2 Meteorology – Data generated at plant site (Primary data March 2016 to May 2016) Meteorology of the study zones plays an important role in the study of air pollution. Micrometeorological conditions at the proposed project site regulate the dispersion and dilution of air pollutants in the atmosphere. For this purpose a weather station was installed near the plant site for the period March 2016 to May 2016 and recorded hourly observations for the parameters like Maximum and minimum Temperatures (oC), Relative Humidity (%), Wind Speed (m/sec), Wind direction and Rainfall (mm). Meteorological conditions, of the site, regulates the transport and diffusion of air-pollutants released into the atmosphere. Ambient temperature, wind speed, wind direction and atmospheric stability are called primary or basic Meteorological Parameters because the dispersion and diffusion of pollutants depend mainly on these Parameters. Humidity, precipitation, pressure and visibility are secondary Meteorological Parameters as this control the dispersion of the pollutants indirectly by affecting primary Parameters. The hourly-recorded observations (wind velocity and wind directions) during above stated study period are used in computing percentage frequencies and are depicted in the form of ‘wind roses’ in Fig. 3.1.2. Primary meteorological data are shown in Annexure A. T. R. Associates, Ahmedabad, Gujarat Chapter-3: Description of Environment 3.4 Environmental Impact Assessment Report Angel Industries, for Proposed Resin Manufacturing Unit Survey No.: 127, Village: Devkaran Na Muvada, Taluka: Dahegam, District: Gandhinagar, Gujarat. Fig. 3.1.2 Meteorological Wind Rose Diagram for March 2016 to May 2016 (Primary data) T. R. Associates, Ahmedabad, Gujarat Chapter-3: Description of Environment 3.5 Environmental Impact Assessment Report Angel Industries, for Proposed Resin Manufacturing Unit Survey No.: 127, Village: Devkaran Na Muvada, Taluka: Dahegam, District: Gandhinagar, Gujarat. 3.1.2 Selection of AAQ stations A network of eight ambient air-sampling locations has been selected for assessment of the existing status of air environment within the study zone. The heights of the sampling locations were kept between 3 to 6 m in all the locations. After reconnaissance of the area and observing the topographical features and review of the available meteorological data and local conditions the sampling sites were chosen which will be the representative of the local areas under study. Fig. 3.1.3 (A) Topo Map showing Ambient Air Quality locations Proposed Project site M/s. Angel Industries A8 A2 A1 A3 A5 A7 A6 A4 T. R. Associates, Ahmedabad, Gujarat Chapter-3: Description of Environment 3.6 Environmental Impact Assessment Report Angel Industries, for Proposed Resin Manufacturing Unit Survey No.: 127, Village: Devkaran Na Muvada, Taluka: Dahegam, District: Gandhinagar, Gujarat. Fig. 3.1.3 (B) Google Map showing Ambient Air Quality locations T. R. Associates, Ahmedabad, Gujarat Chapter-3: Description of Environment 3.7 Environmental Impact Assessment Report Angel Industries, for Proposed Resin Manufacturing Unit Survey No.: 127, Village: Devkaran Na Muvada, Taluka: Dahegam, District: Gandhinagar, Gujarat. 3.1.3 Existing AAQ (Pre-project) status Ambient levels of pollutants such as PM10, PM2.5, SO2, NO2, CO and VOC are selected for the sampling. The methodology of sampling and analysis in detail is given in the following tables 3.1.4 & 3.1.5. Table: 3.1.3 Ambient Air monitoring locations Reason for Direction Ambient Air Code selecting Distance in km GPS Coordinates Location location 23° 7' 22.92" N A1 Project site -- 0 -- 72° 56' 3.09" E Downwind & 23° 7' 36.40" N Devkaran na A2 Near Reserve ENE 1.79 72° 57' 4.12" E Muwada * forest 23° 7' 23.12" N A3 Chiskari Population W 1.97 72° 54' 53.76" E 23° 5' 59.17" N A4 Isanpur Dodiya Population SW 3.43 72° 54' 42.33" E Laluji ni 23° 7' 6.45" N A5 Upwind WSW 0.99 Muwadi 72° 55' 33.14" E Downwind & Nr. 23° 6' 20.99" N Utkantheshwar 72° 58' 58.05" E A6 Vaghjipur * ESE 5.33 mahadev & Vatrak River 23° 6' 21.41" N A7 Baria Nr. Vatrak River SE 3.13 72° 57' 30.95" E 23° 8' 58.02" N A8 Najupura* Downwind ENE 8.50 72° 0' 39.41" E Note: * Downwind direction T. R. Associates, Ahmedabad, Gujarat Chapter-3: Description of Environment 3.8 Environmental Impact Assessment Report Angel Industries, for Proposed Resin Manufacturing Unit Survey No.: 127, Village: Devkaran Na Muvada, Taluka: Dahegam, District: Gandhinagar, Gujarat. Figure : 3.1.4 Photograph showing Ambient Air Monitoring Village Vaghjipur Village Chiskari Latitude 23° 6' 20.99" N Latitude 23° 7' 23.12" N Longitude 72° 58' 58.05" E Longitude 72° 54' 53.76" E Table 3.1.4: Air – Parameters analyzed and sampling duration Attribute Parameter Frequency of Monitoring PM10, PM2.5, 24 hrs.