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EIA Studies of 3 Pre-Identified Hazardous Waste Disposal Sites in ...

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Rapid <strong>EIA</strong> <strong>Studies</strong> <strong>of</strong> 3 <strong>Pre</strong>-identified <strong>Hazardous</strong> <strong>Waste</strong> <strong>Disposal</strong> <strong>Sites</strong> <strong>in</strong> NCT - Delhi:<br />

Page No.91<br />

Follow<strong>in</strong>g <strong>in</strong>ference can be drawn from the results obta<strong>in</strong>ed:<br />

1. The sub-soil strata from exist<strong>in</strong>g ground surface to 20.40m depth consists<br />

predom<strong>in</strong>antly <strong>of</strong> f<strong>in</strong>e gra<strong>in</strong>ed soils i.e. sandy silt <strong>of</strong> low plasticity (CL/ML-CL).<br />

However, the sub-soil strata from depth 2.50 to 5.00m consists predom<strong>in</strong>antly <strong>of</strong><br />

coarse gra<strong>in</strong>ed soils i.e. silty sand (SP-SM).<br />

2. Dur<strong>in</strong>g the field <strong>in</strong>vestigation, groundwater table was encountered at 6.10 m<br />

depth below the exist<strong>in</strong>g ground level.<br />

Fig 4.25 depicts the variation <strong>of</strong> permeability through different strata.<br />

Environment Division, National Productivity Council, New Delhi<br />

4

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