350 MW Pragati-II Combined Cycle Power Project of PPCL

Rapid Environmental ImpactAssessment Study of the Proposed350 MW Pragati-II Combined CyclePower Project of PPCLDoc. No.: CW-EN-9384-C-379-E-R-002Rev. No.: R0Issue Date: 21-02-2006Page No: 12 of 16control measures such as paving and surface treatment, water sprinkling andplantation schemes. So, there will be positive impact.There is only one major gaseous pollutant NOx. As DLN burners shall beincorporated to reduce the formation of NOx, long-term incremental ground levelconcentration of NOx in the study area due to plant operation will be very low. Thus,impact of the emissions on terrestrial ecosystems would be insignificant.11.7 AQUATIC ECOLOGYThe runoff from construction area will be discharged through a catchments pit/-settling pond, thereby reducing suspended solids in stream water runoff andreduction in possibilities of sedimentation at river/water bed. Although, during heavyrainfall in monsoon months, Yamuna is generally flooded and carry significantconcentration of suspended solids from catchment area. Thus, the impact ofconstruction activities on aquatic ecology of Yamuna River is likely to be insignificant.Pragati II CCPP will not draw any water from Yamuna river, which is natural waterbody.Further, as the project will have a close cycle cooling system with cooling towers,there will be no thermal impact on aquatic ecosystem due to operation of the plant.Secondly all the effluent will be treated before discharge into the drain joiningYamuna River.11.8 NOISEThe major noise generating sources during the construction phase are vehiculartraffic, construction equipments like, dozer, scrapers, concrete mixers, cranes,generators, pumps, compressors, rock drills, pneumatic tools, vibrators etc. Theoperation of these equipment will generate noise ranging between 75 – 90 dB (A).The predicted noise level due to operation of such equipment at a distance of 1.5 kmfrom the source is 23.9 dB(A).The ambient noise level recorded during field studies in the near by area of the siteranges between 20.0 – 60.2 dB(A). As the ambient noise levels are higher than thepredicted noise levels, due to masking effect, no increase in the ambient noise levelsduring construction phase is envisaged.Thus, there would not be any adverse impact due to construction and operation ofthe plant on the noise level of the surrounding area.12.0 ENVIRONMENTAL MANAGEMENT PLAN12.1 CONSTRUCTION PHASE• During construction phase, water shall be sprinkled in the vulnerable areas tosuppress the dust generated during excavation, leveling and other operations.• The effluents from construction area shall be channeled through sedimentationtanks to remove suspended solids.EXECUTIVE SUMMARYMANTEC CONSULTANTS (P) LTD., NEW DELHI