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.58
The surface water quality has been defined for five designated best uses by Ministry
of Environment & Forest under 'The Environment (Protection) Rules, 1986' (Refer
Annex III). The above mentioned surface water qualities (around the proposed sites)
have been compared with the standards. The summary of which is given below:
Site I & Site IV:
The quality of surface water bodies were compared with the standards of surface
water quality (Class SW-II, Refer Annex III). Except for Bawana distributory all
comply with the standard of BOD of 3 ppm .
The proposed site I & IV falls in the ground water recharge zone of Western Yamuna
canal. Around the proposed site I, the surface water quality results does not indicate
any organic or inorganic pollution at present as can be seen from table 4.2. These
surface water bodies play an important role in ground water flow and quality as they
fall within the groundwater recharge zone.
Site II
The only canal flowing within 5 Km radius from the proposed site is Delhi distributory
(Western Yamuna canal) which shows no organic or inorganic pollution. The others
include Bhalswa lake which is used for recreational purpose complies with the
standards for Class SW-III (refer Annex III). The drains viz, Najafgarh and
supplementary drain indicates presence of organic pollution.
Site III
It is seen from the table 4.4 that organic load in terms of BOD in Najafgarh drain is
increasing from the site at Ghumman Hera to village Jhatikara and the same has
reduced at Wazirpur.
High Fluoride content found at several locations. The reason for high flouride content
is due to the minerals found in NCT - Delhi.
Impact of major drains falling in the river Yamuna on the river water quality
The reason for deterioration of water quality of river Yamuna is largely due to the
discharge of industrial and domestic wastewater through 16 drains meeting Yamuna
at different locations. The river is blocked at Wazirabad for maintaining water level
and to abstract raw water for water supply. Thus during lean period, the flow is
mainly the flow from the drains.
4.3.3 Hydro-geological Situation at Proposed Sites
(Source: Comments received from CGWB on Proposed sites)
Around Site I (Bawana Industry relocation site and its surrounding)
The area is covered by a thin layer of newer alluvium Yamuna sand that is in-turn
underlain by older alluvium. The area falls at the borderline where newer alluvium
merges with older alluvium. Thickness of alluvium is approximately 300m. Newer
Environment Division, National Productivity Council, New Delhi
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