EIA Studies of 3 Pre-Identified Hazardous Waste Disposal Sites in ...
EIA Studies of 3 Pre-Identified Hazardous Waste Disposal Sites in ... EIA Studies of 3 Pre-Identified Hazardous Waste Disposal Sites in ...
Rapid EIA Studies of 3 Pre-identified Hazardous Waste Disposal Sites in NCT - Delhi: Page No.64 4.3.5 Ground Water Quality In NCT of Delhi, groundwater recharge takes place via rainfall as well as through infiltration of surface water. Groundwater recharge also occurs through stagnant water pools in low-lying areas, where surface run off water gets collected. Extensive studies on groundwater quality have been carried in NCT -Delhi by Central Pollution Control Board (CPCB) and Central Ground Water Board (CGWB) and the results of these studies have been reproduced here for comparative evaluation. Site I: Bawana Relocation industrial site & Site IV: Old Bawana site Chemical quality of ground water in Bawana shows wide variations with depth. A detailed study has been carried out to test the chemical quality of ground water from the abstraction structures of varying depths located in different areas around Bawana village. A thick column of fresh ground water aquifer system exists down to a depth of 50 to 70 m in the vicinity of Western Yamuna Canal and thickness decreases away from canal. In the villages east of Bawana, Khera khurd, Nayabas, North of Shahbad, thickness of fresh water aquifers is about 50 to 60 m. The ground water in this depth range is fit for drinking, domestic and industrial uses with electrical conductivity less than 2000 microsiemens/cm at 25 o C and other parameters meet the drinking water standards. In the villages Puth khurd, Barwala, North of Sanoth and Holambi khurd, the thickness of fresh water aquifers is about 15 to 25 m. Thus existence of thick column of fresh ground water aquifers beneath Western Yamuna Canal is due to infiltration of fresh water from the canal and flushing of entrapped saline water from these aquifers. A linear relationship exists between Electrical Conductivity of ground water and distance of sampling point from Western Yamuna Canal clearly depicts the contribution of seepage and infiltration component of fresh water in to the aquifers in this area. This is due to highly porous soil media existing in this area in the form of sandy newer alluvium and silty sand mixed with kankar formations of older alluvium. Site II: Wazirpur CETP site Generally, the quality of ground water at shallow depths (about 40 to 50 m) is reported to be fresh and becomes brackish to saline with increase in depth. Ground water flow is towards northeast in this area. Site III: Guman Hera site The groundwater available up to a depth of 35 m bgl is saline and hard. The potable drinking water is available below a depth of 35 m bgl. Environment Division, National Productivity Council, New Delhi 4
Rapid EIA Studies of 3 Pre-identified Hazardous Waste Disposal Sites in NCT - Delhi: Page No.65 Groundwater quality (From Secondary Sources) The groundwater quality around the proposed sites were assessed using the data/ information reported in following documents/ reports: (1) Report titled " Status of Ground Water Quality and pollution Aspect in NCT- Delhi, Central Ground Water Board/ Central pollution Control Board, January, 2000 (2) Report titled " Study of groundwater quality in Delhi", Sophisticated Industrial Materials Analytic Labs. Pvt. Ltd., March - 1999 The ground water quality around the identified sites based on report (1) is given in tables 4.5, 4.6 & 4.7 and based on report (2) in table 4.8 & 4.9 respectively. Ground Water Monitoring (Primary data) Groundwater samples from dug wells, Handpumps, tubewells from different locations within 5-Km radius from each proposed site were collected and analysed in NPC Laboratory. The groundwater sampling locations are shown in Fig 4.14, 4.15, 4.16. The analysis results are given in Tables 4.10 through 4.12. Environment Division, National Productivity Council, New Delhi 4
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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.65<br />
Groundwater quality (From Secondary Sources)<br />
The groundwater quality around the proposed sites were assessed us<strong>in</strong>g the data/<br />
<strong>in</strong>formation reported <strong>in</strong> follow<strong>in</strong>g documents/ reports:<br />
(1) Report titled " Status <strong>of</strong> Ground Water Quality and pollution Aspect <strong>in</strong> NCT-<br />
Delhi, Central Ground Water Board/ Central pollution Control Board, January,<br />
2000<br />
(2) Report titled " Study <strong>of</strong> groundwater quality <strong>in</strong> Delhi", Sophisticated Industrial<br />
Materials Analytic Labs. Pvt. Ltd., March - 1999<br />
The ground water quality around the identified sites based on report (1) is given <strong>in</strong><br />
tables 4.5, 4.6 & 4.7 and based on report (2) <strong>in</strong> table 4.8 & 4.9 respectively.<br />
Ground Water Monitor<strong>in</strong>g (Primary data)<br />
Groundwater samples from dug wells, Handpumps, tubewells from different locations<br />
with<strong>in</strong> 5-Km radius from each proposed site were collected and analysed <strong>in</strong> NPC<br />
Laboratory. The groundwater sampl<strong>in</strong>g locations are shown <strong>in</strong> Fig 4.14, 4.15, 4.16.<br />
The analysis results are given <strong>in</strong> Tables 4.10 through 4.12.<br />
Environment Division, National Productivity Council, New Delhi<br />
4
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