The trust of the study is the evaluation of ecological impacts of the proposed DHPU as part of the augmentation of the existing refinery of BRPL. The expected outcome of such an evaluation is the identification of ecological resources within the area that could be at risk, prediction and evaluation of impacts that may occur and the mitigation of ecological impacts through the incorporation of the appropriate measures to avoid, ameliorate and compensate the associated impacts of the project. Ecological assessment is thus aimed to provide a scientifically defensible rational for decision-making and better environmental management. The methodological approach adopted for this study conforms to standard practices being adopted worldwide for ecological impact assessment (Bagri and Vorhies, 1997; Petts, 1999; Treweek, 1999). a broad framework of procedures followed for this study is provided in Fig. 2.
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