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In order to prevent pollution from landfill operation which of the following provisions are supposed to be made? (i) The storm water drain shall be designed and constructed in such a way that the surface runoff water is diverted from the landfilling site and leachates from solid waste locations do not get mixed with the surface runoff water (ii) Non-permeable lining system should be provided at the base and walls of waste disposal area. (iii) Provisions for management of leachates including its collection and treatment shall be made.

In order to prevent pollution from landfill operation which of the following provisions are supposed to be made? (i) The storm water drain shall be designed and constructed in such a way that the surface runoff water is diverted from the landfilling site and leachates from solid waste locations do not get mixed with the surface runoff water (ii) Non-permeable lining system should be provided at the base and walls of waste disposal area. (iii) Provisions for management of leachates including its collection and treatment shall be made. Correct Answer (i), (ii) and (iii)

Explanation:

Pollution prevention:

To prevent pollution problems from landfill operations, the following provisions shall be made, namely:

(i) Diversion of stormwater drains to minimize leachate generation and prevent pollution of surface water and also for avoiding flooding and creation of marshy conditions.

(ii) Construction of a non-permeable lining system at the base and walls of the waste disposal area. For landfill receiving residues of waste processing facilities or mixed waste or waste having contamination of hazardous materials (such as aerosols, bleaches, polishes, batteries, waste oils, paint products and pesticides) minimum liner specifications shall be a composite barrier having 1.5 mm high-density polyethene (HDPE) geomembrane, or equivalent, overlying 90 cm of soil (clay or amended soil) having permeability coefficient not greater than 1 x 10-7 cm/sec. The highest level of the water table shall be at least two metres below the base of clay or amended soil barrier layer.

(iii) Provisions for the management of leachates collection and treatment shall be made. The treated leachates shall meet the standards specified in Schedule- IV.

(iv) Prevention of run-off from landfill area entering any stream, river, lake or pond.

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