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Environmental Impact Assessment Study for the Proposed Greenfield Airport at Holongi, Itanagar, Arunachal Pradesh

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Environmental Impact Assessment Study for the Proposed Greenfield Airport at Holongi, Itanagar, Arunachal Pradesh ENVIRONMENTAL IMPACT ASSESSMENT STUDY FOR THE PROPOSED GREENFIELD AIRPORT AT HOLONGI, ITANAGAR, ARUNACHAL PRADESH FINAL EIA REPORT Environment Consultant : Project Proponent : Vimta Labs Limited Approved Consultant 142, IDA, Phase-II, Cherlapally, Airports Authority of India Hyderabad–500 051, www.vimta.com Rajiv Gandhi Bhavan, (NABL/ISO 17025 Certified Laboratory, New Delhi Recognized by MoEF, New Delhi) November, 2018 Environmental Impact Assessment for the Proposed Greenfield Airport at Holongi, Itanagar, Arunachal Pradesh Executive Summary 1.0 EXECUTIVE SUMMARY Arunachal Pradesh is the largest state in the North Eastern region of India and is without any airport. So far Naharlagun, which is about 15 km from Itanagar, is connected by helicopter service. The state capital of Itanagar is, therefore, neither connected to other states by air and nor by rail. For better connectivity and overall development of the state, the Government of Arunachal Pradesh has decided to place the state capital i.e. Itanagar on the country’s map in respect of airports by constructing a new airport at Itanagar. The project will be taken through government grant on socio-economic consideration and AAI is the implementing agency. 1.1 Location Details and Environmental Setting The airport reference point is latitude: 26058’12 N” and longitude: 93039’53” E; Average elevation of the site is about 104 m above MSL; No ecologically sensitive zones like national parks, wildlife sanctuaries exist within 10 km radius area. Drupong reserve forest exist within the study area; The nearest railway station is Gohpur RS in Assam located at about 8.4 km and National Highway (NH-52) is at a distance of 8.8 km from the airport boundary; and Kokila and Holongi rivers are passing adjacent to the airport boundary in the E and SW direction respectively. The study area map showing 10 km radius from the project boundary is given in Figure-1. 1.2 Project Description About 424.281 ha (1048.4 acres) of land is allotted for the proposed project which will be required for the ultimate development. In addition to construction of airport, the project will also include provision for residential & commercial activities such as AAI colony, hotel, convention center etc. Salient features of the proposed project is given in Table-1. VIMTA Labs Limited, Hyderabad ES-1 Environmental Impact Assessment for the Proposed Greenfield Airport at Holongi, Itanagar, Arunachal Pradesh Executive Summary FIGURE-1 STUDY AREA MAP VIMTA Labs Limited, Hyderabad ES-2 Environmental Impact Assessment for the Proposed Greenfield Airport at Holongi, Itanagar, Arunachal Pradesh Executive Summary TABLE-1 PROPOSED FACILITIES Sr. No. Particulars Details 1 Type of Airport 3C 2 Aircraft A-320 type of aircrafts 3 Terminal Building Area-4,100 sq m, 200 PHP 4 Runway 2300 m X 45 m 08/26 degree magnetic (with RESA) 5 Link Taxiway 290 m x 23 m x 2 nos (One for entry and one for exit) 6 Technical Block 1450 sq m 7 Apron 13320 sq m 8 Fire Station 1330 sq m of Category-V 9 Car Parking 4000 Sq m (100-150 cars) 10 DVOR & NDB Building 200 Sq m 11 Water Requirement 90 KLD 12 Power Requirement 1.0 MW 1.2.1 Resources Requirement Water Requirement The total water requirement would be 50-75 KLD for construction phase and 90 KLD for operation phase which will be met from Kokila stream at around 8 km as suggested by State Government. Water treatment plant of about 104 KLD capacity is proposed to be set up for the airport. Power Requirement It is estimated that about 0.1 MW power would be required during construction phase and about 1.0 MW (1000 KW) during operation phase. The entire power requirement will be met by constructing of independent 33 KV line upto airport. Stand by source of 250 KVA DG set is also proposed (2 Nos, only 1 will be operational at a time during power failure). 1.3 Baseline Environmental Status 1.3.1 Soil Characteristics The soil samples were tested at eight locations during post-monsoon and partly winter season covering various land uses. It has been observed that the pH of the soil in the study area ranged from 4.5 to 6.3. The electrical conductivity was observed to be in the range of 14.8 µmhos/cm to 118.6 µmhos/cm. The nitrogen values range between 14.3-119.5 kg/ha. The phosphorus values range between 2.8 to 692.6 kg/ha. The potassium values range between 28.0 – 217.1 kg/ha. The soils from the study area indicate medium fertility due to their NPK content. 1.3.2 Climatology and Meteorology The recorded temperature at site during study period ranges between 5.8oC to 15.9oC and relative humidity ranges in between 55% to 78%. Predominant winds from N and NE directions were observed during the study period. VIMTA Labs Limited, Hyderabad ES-3 Environmental Impact Assessment for the Proposed Greenfield Airport at Holongi, Itanagar, Arunachal Pradesh Executive Summary 1.3.3 Ambient Air Quality To establish the baseline status of the ambient air quality in the study area, the air quality was monitored at eight locations. PM2.5 and PM10 are observed to vary 3 3 3 3 from 6.1 g/m to 13.4 g/m and 15.2 g/m to 28.8 g/m respectively. SO2 and NOx are observed to vary from 8.2 g/m3 to 12.8 g/m3 and 9.0 g/m3 to 13.8 g/m3 respectively. 1.3.4 Water Quality The baseline water quality status in the region is established by collecting water samples from twelve locations. Surface Water Quality The analysis results indicate that the pH values in the range of 7.2 to 7.7. The TDS was observed in the range of 187.8 mg/l to 252 mg/l. The chlorides and sulphates were found to be in the range of 2.8 to 5.7 mg/l and 23.2 to 32.2 mg/l respectively. The calcium & magnesium were found to be in the range of 24.0 to 28.8 mg/l and 3.9 to 7.8 mg/l respectively. The surface water quality in the study area does not indicate any industrial contamination. Ground Water Quality The analysis results indicate that the pH ranges in between 6.5 to 7.4. Total hardness was observed to be ranging from 32.0 to 148.0 mg/l. Chlorides were found to be in the range of 2.8 mg/l to 28.4 mg/l. Sulphates were found to be in the range of 4.2 mg/l to 47.1 mg/l. The Total Dissolved Solids (TDS) concentrations were found to be ranging in between 52.5 to 323.8 mg/l. The ground water quality in the study area does not indicate any industrial contamination. 1.3.5 Noise Level Survey The noise monitoring has been conducted at ten locations in the study area. Day time, night time noise levels were found to be varying from 39.2 dB(A) to 51.5 dB(A) and 33.6 dB(A) to 42.9 dB(A) respectively in the study area. The noise levels in general found within the acceptable levels as per standards prescribed by Central Pollution Control Board. 1.3.6 Ecological Studies The study comprises of Arunachal Pradesh and Assam border area within the Holongi 10 km study area. There are few rare and threatened fauna in the study area in the confines of the Holongi 10 km study area and in the eco-region of Gohpur reserves forests of Assam in the study area, as listed in the Indian Wildlife (Protection), Act, 1972. VIMTA Labs Limited, Hyderabad ES-4 Environmental Impact Assessment for the Proposed Greenfield Airport at Holongi, Itanagar, Arunachal Pradesh Executive Summary Presence of quite few Scheduled-I species recorded in the study area, including migratory Himalayan Griffon Vulture, and there are no rare and threatened plant species in the study area as per the Botanical Survey of India records. Apparently there is no presence of Ramsar Sites and Important Bird Areas within the 10 km study area, nor were threatened plants recorded in the study area as per the records of the Botanical Survey of India. 1.3.7 Demography and Socio-Economic Profile The information on socio-economic aspects of the study area has been compiled from secondary sources, which mainly include census data of 2011. The total population of the study area is about 94,726 and the sex ratio is 976. In the study area about 33.39 % population belong to Scheduled Tribes (ST) and 5.18 % Scheduled Castes (SC) indicating that about 38.57 % of the population in the study area belongs to socially weaker sections. About 73.05 % of people are literates. The study area contains about 61.36 % of main workers, 38.64 % of marginal workers and 55.17 % of non-workers. 1.4 Anticipated Environmental Impacts And Mitigation Measures The potential environmental impacts due to the proposed project have been assessed in detail. These include impact on air quality, noise, water quality, solid waste, ecology and socio economics, etc. The modelling and analysis of the data indicate that the predicted impacts are minimal and are within the prescribed norms and standards. Comprehensive mitigation measures have been incorporated in the environmental management plan to ensure that the environmental quality is protected and enhanced. These have been summarised in Table-2. TABLE-2 SUMMARY OF IMPACTS AND MITIGATION MEASURES Discipline Potential Mitigative Measures Remarks Impacts/Issues Construction Phase Air Quality Increase in dust and Sprinkling of water in the The impact is likely to be for NOx concentration construction area and short duration and confined paving of unpaved roads locally to the construction site itself.
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