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: 6 of 1610.5 SOILperennial river in the area. During floods the river increases considerably in width.Geologically, the study area is covered by quaternary alluvial sediments comprisingsand, silt, clay and kankar. The depth of bed rock in the Yamuna River Bed is about150 meter.The physico-chemical and nutrient characteristics of the soil were monitored at10 locations in the study area. The soil texture is sandy loam, loamy and sandy clayloam. The pH of the soil varies from 6.91 to 8.22 indicating that soil is mostly neutral.The conductivity varies from 668 to 1620 µmho/cm., respectively. The averageconcentrations of nitrogen, phosphorus and potassium varies from 71 to 85 mg/100g,1.02 to 2.12 mg/100g and1.20 to 4.21 mg/100g, respectively. The cation exchangecapacity varies from 10 to 18.75 meq/ 100g.10.6 WATER QUALITYThe surface water quality was monitored at four locations at Yamuna River, (Upstream of plant location), Yamuna River (Confluence of drain), Yamuna River (Nizamuddin Bridge), Yamuna River ( Kalindi Kunj ) , while ground water quality wasalso monitored at two locations Mayur Vihar Phase- I and Delhi Jal Board OkhlaPumping Station. Treated waste water location is Okhla waste water Station in thestudy area. The water samples were analyzed for physicochemical parameters,bacteriological parameters, trace elements and heavy metals and indicators ofpollution.The results of analysis showed that water quality of ground water meets the waterquality criteria stipulated in IS: 10500 except Total Dissolved Solids (TDS), whichmakes it suitable for drinking after conventional treatment.Table -1Physico Chemical Characteristics of Surface Water QualitySl. Parameter PrescribedLimitsProtocolGeetaColony(YamunaRiver)Kalindi Kunj(Yamuna River)YamunnaRiverYamunnaRiver(confluence (Nizamuddin)of drain)Oct Nov Oct Nov2005 2005 2005 2005No.Sep 2005 Sep2005Oct2005Nov20051 pH 6.5-8.5 IS:2296 7.57 6.7 7.1 7.2 7.4 7.3 7.2 7.12 DissolvedOxygen, mg/l3 Conductivity,µmho/cm4 IS:2296 0.7 0.9 0.7 0.8 0.6 0.5 0.6 0.67- IS:2296 1035 534 1523 1600 1604 1657 1568 16214 TSS, mg/l - IS:2296 55 45 60 65 63 65 62 615 TDS, mg/l 500 IS:2296 612 320 914 990 962 978 941 934EXECUTIVE SUMMARYMANTEC CONSULTANTS (P) LTD., NEW DELHI