proposed integrated complex for delhi judicial academy

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Rapid Environmental Impact Assessment (REIA) Study for Proposed Integrated Complex for Delhi Judicial Academy, National Law School, and National Institute for Mediation & Conciliation at Dwarka, New Delhi The environmental impacts in this section have, as such, been discussed separately for the construction phase and the operation stages of the proposed project. The environmental impact assessment approach used to evaluate the proposed project comprises of three sequential elements. These are impacts identification, prediction and evaluation. The first step of the impact assessment process involves identifying the key issues associated with the construction and operation phases of the project. Issues and concerns of the proposed project are scoped based on the knowledge and experience with respect to environmental setting and project elements. Accordingly, the existing environmental system is described and the components of the project are determined. This step involves identification of the environmental modification that may be significant, forecasting of the quality and spatial dimension of change in the environment identified and estimation of the probability that the impact will occur. This step involve determination of the incidence of benefit to user groups and population affected by the project, specification and comparison of effects between various alternatives, and assessment of the likely effect of the project on the environmental, economical and social components indicating the nature of effects. 5.2 Impacts on Ambient Air Environment The potential ambient air quality impacts arising from the proposed project would occur mainly during project construction phase. Suspended Particulate Matter (SPM) and Respirable Particulate Matter (RPM) would be the predominant pollutant generated from construction activities. The gaseous emissions such as SO 2 , NOx and CO would be generated from the construction equipments and vehicles. During operation phase, DG sets would be the only point source of emission. The ambient air quality monitoring results show that the SPM and RPM concentrations at most of the locations within the core zone of the proposed project site are close to the norms prescribed for the residential areas. However, appropriate mitigation measures would still be employed during the construction stage to reduce any incremental rise in pollution level to an acceptable limit. 98
Rapid Environmental Impact Assessment (REIA) Study for Proposed Integrated Complex for Delhi Judicial Academy, National Law School, and National Institute for Mediation & Conciliation at Dwarka, New Delhi Monitored values of SO 2 , NOx and CO in the ambient air are well within the limits indicating low pollution level (L) as per the CPCB criteria. 5.2.1 Impacts During Construction During construction, the project would have two major impacts on ambient air quality due to an increase in gaseous emissions by heavy construction equipments and vehicles, and an increase in dust by construction activities. Earth excavation work, foundation work, superstructure work, material storage, transportation and handling of construction materials, and wind erosion are the major factors that would produce a temporary, localized increase in SPM and RPM levels. The increased movement of heavy vehicles carrying construction materials, operation of DG sets as standby power back up system would generate gaseous emissions. The degree of dust generated would depend on the soil compaction and moisture content of the ground surface during construction. Dust and exhaust particulate emissions from heavy equipment operations would temporarily degrade air quality in the immediate construction zone. The increase in air particulates would be minimized by the performance of the work. The construction contractor will visually monitor dust levels on the site during construction. Dust suppression will be instituted, using water tankers mounted on tractors, sprinklers and other means as necessary, in the event that high levels of dust are observed, strong winds and dry conditions make dust generation likely, and complaints about dust are received. Other diffused source of gaseous emissions from the construction site would be if the construction labours use fuel wood for cooking and heating during winters. The construction contractor will ensure that such practice is not adopted by the labours and they are provided with LPG cylinders for cooking in their labour camps. 5.2.2 Impacts During Operation None of the proposed structures at the project site would be expected to have an impact on air quality during their normal operation. However, the only point source of emission will be DG sets which will be installed as standby power supply system. To meet the power requirement during emergencies, the project has proposed to install DG sets as standby power supply system. 99
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