Summary


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Hydro-treatment Plant at Bongaigaon

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The proposed Hydrotreatment Plant would be located in the existing complex of Bongaigaon Refinery & Petrochemicals Ltd. (BRPL) at Dhaligaon in Bongaigaon District of Assam. Based on the overall plot plan of the proposed Hydrotreatment Plant, it is evident that the proposed development would be confined within a plot area of 80 m x 78 m in the existing complex of BRPL. The proposed Hydrotreatment Plant would produce 132,975 tonnes per annum (tpa) of hyrotreated LGO suitable for blending into HSD pool of the refinery and would also produce 2,947 tpa of wild gasoline. The areas of ecological interest within 10 km radial zone of the Project site include (i) Reserved Forests (Nakatti, Kakaijana and Bhumeshwar), (ii) Rivers (Aie, Tunia and Kujia) and (iii) Lakes (Bhosamari, Paropota, Naodora and Kasorani).

Predicted Impacts

  • The Reserved Forest areas of Aie Valley Division within the study zone are a home to a large number of endangered species such as capped and golden langur, clouded leopard, panther, Indian elephants, Malayan giant squirrel, three striped and five striped palm squirrels and small Indian mongoose. The Kakaijana Reserved Forest has a special significance as a wildlife habitat as it is the only patch within the study zone that harbours golden langur. Given the overall plot plan of the proposed Hydrotreatment Plant, it is evident that the development under this project would be confined to a plot area of 80 m x 78 m within the existing complex of Bongaigaon Refinery and Petrochemicals Ltd. The plot surroundings already have developed road network and essential infrastructural support (hydrogen source, tank farm, utility block, control room, crude distillation unit and delayed coker unit). No significant impacts on forest habitats are therefore foreseen from works involving land preparation and construction activities in developing the site for proposed Hydrotreatment Plant.
     
  • The effluents of the BRPL refinery drain into a small rivulet the Tunia nala originating from BRPL complex and ultimately draining into Tunia river. This river passing through the outskirts of Bongaigaon township is already a receiving channel for municipal sewage, waste waters from railway colony and effluents from small industrial units. The liquid effluents generated in the Hydrotreatment Plant would be treated in the existing effluent treatment plant of refinery which is being augmented and modernised. The proposed Hydrotreatment Plant is therefore not likely to further elevate the pollution levels of already polluted stretch of Tunia river. All other wetlands that are currently enjoying the status of good aquatic habitats will not be affected by the proposed expansion.

Mitigation Measures

  • Use of advanced technology for waste disposal and treatment of effluents must be ensured by the project authorities.
  • Monitoring should be taken up on a regular basis to make necessary interventions to restore threshold limits of physical properties and chemical constituents of air, water and soil.
  • Sound and effective Environmental Management Plan (EMP) should be developed by project authorities using the expertise available on different components of EMP.

Project Analysis

The proposed expansion within the existing complex of BRPL is not expected to have significant impacts on the ecology of the area.

Decision on Environmental Clearance

The Project has not yet been placed before MOE&F for seeking environmental clearance.Location Map

State Map

 

 

Client Bongaigaon Refinery and Petrochemicals Limited
Project Team Project Team
Project Personnel

Antesh
Sreejith Gopalan

Principal Investigator
Dr. Asha Rajvanshi

Project Co-ordinator
S.K. Mukherjee

References Ecological assessment of proposed hydrotreatment plant at Bongaigaon. 1997. WII - EIA Technical Report 18. Wildlife Institute of India, Dehradun.