Page 38 - DPR Rishikesh Legacy_Neat

Dumpsite closure show significant settlement. Rectification measures must not only
re-establish the initial slope of the cover (for proper surface water runoff) but must
also ensure that all the components of the landfill cover system continue to perform
as originally envisaged. Adequate equipment and funds shall be allocated for post
closure maintenance work in the form of soil filling re-grading the cover and re-
vegetating the landfill cap.

In areas where extensive erosion gully formation is observed, filling of cover
material, regarding of cover slopes and re-vegetation must be routinely undertaken.

4.1.10 SURFACE WATER DRAINAGE SYSTEM

The surface water drainage system shall also be inspected 2 to 4 times a year.

- To identify cracks in drains due to settlements
- To delineate clogged drain requiring immediate clean up and
- To study the level of deposited soil in the storm water basin and initiate excavation
measures.

4.1.11 GAS AND LEACHATE MANAGEMENT SYSTEM
Periodic inspection of the gas collection system shall be undertaken to identify
broken pipes, leaking gas (if any). Repair work for gas management system
requires skilled man power and shall be carried out by the agencies operating the
gas treatment facilities. One may often have to install new gas extraction if the
damaged / clogged facilities are inaccessible and irreparable.

4.1.12 ENVIRONMENTAL MONITORING SYSTEM

Ground water monitoring wells, air quality monitoring system and vadose zone
monitoring instruments shall be periodically inspected to check satisfactory
functioning of the systems and to ensure good health of all well caps and sampling
ports.
Environmental monitoring system shall be maintained during the entire post –
closure period as per the requirements of the local environments regulatory
agencies. Wherever possible, monitoring instruments shall be periodically
recalibrated. Sample devices shall be routinely detoxified and checked for proper
functioning of the opening and closing of valves or springs loaded mechanisms.

4.2 BIOMINING OF OLD DUMPSITE

Biomining is a technique to recover/ segregate useful material from waste mound
thus recovering the land for future developments. Biomining activity will involve
stabilization of waste dump by way of spraying inoculum, excavation, sorting of
wastes into different categories using sorting line (Trommels/ Sieves), bailing of
materials. Useful materials are sent to recovery or onward utilization and inerts are
disposed off in low-lying areas of the town or in Sanitary Landfill if rejects are found
to be not suitable for filling the low lying areas.

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