LE 1 CONCEPTS (M5.3)

Question 1

The Largest Landfill on Earth

Answer 1

The Great Pacific Garbage
Patch

Question 2

operated and used with the least
consideration to environmental protection

Answer 2

Open dumpsite

Question 3

a progression from open dumping,
enhancement on improvements of the facility to mitigate hazards to health, public safety and to the environment
as a whole

Answer 3

Controlled dumpsite

Question 4

a facility which ensures public safety
and environmental health is protected

Answer 4

Sanitary landfill

Question 5

Method of disposing refuse on land
without creating nuisance or hazards
to public health safety by utilizing the
principles of engineering to confine
the refuse to the smallest possible
volume and to cover it periodically
with a layer of earth

Answer 5

Sanitary Landfilling

Question 6

Landfill Stages

Answer 6

1. Costing
2. Site Selection
3. Design
4. Construction
5. Operation
6. Closure
7. Post-closure

Question 7

liquid that has percolated
through solid waste and has
extracted dissolved or
suspended materials

Answer 7

Leachate

Question 8

Placed on the bottom and lateral sides
of landfill. Main purpose is to isolate the solidvwaste and prevent contamination of the surrounding soil and groundwater

Answer 8

Liner System

Question 9

Low-permeability soils (clays, silty-clays, clayey sands, silty sands, soil-bentonite mixtures)

Answer 9

Compacted clay liners (CCL)

Question 10

Low permeability material that is thin and flexible

Answer 10

Geomembranes

Question 11

Composite liner which is comprised of two or more low-permeability components made of different materials in contact with each other

Answer 11

Geosynthetic clay liners (GCL)

Question 12

permeable geosynthetic comprised
solely of textiles; usually made from
polypropylene or polyester polymers formed into fibers or yarns and finally into a woven or nonwoven fabric

Answer 12

Geotextile

Question 13

a geosynthetic material similar in
structure to a geogrid, consisting of integrally connected parallel sets of ribs overlying similar sets at various angles for in-plane drainage of liquids or gases

Answer 13

Geonet

Question 14

Used to collect the leachate produced in a landfill, to prevent the buildup of leachate head on the liner

Answer 14

Leachate Collection and Removal System (LCRS)

Question 15

The 2 primary constituents in a landfill are ___________ and _____________

Answer 15

methane and carbon dioxide

Question 16

Spread 1-ft thick clay soil. Compact to 6in or 150mm

Answer 16

Daily Covers

Question 17

Alternative Daily Covers

Answer 17

• Plastic Tarp
• Foams
• Hydromulch

Question 18

Providing foundation for roads for the collection vehicles as well as draining the rainwater away from the landfill sites which are to be left exposed for considerably long period

Answer 18

Intermediate Covers

Question 19

• Consists of barrier and drainage layers
• Main purpose is to minimize water infiltration into the landfill to
  reduce the amount of leachate generated after closure
• Grass and other plants cover the municipal solid waste landfill

Answer 19

Final Cover System

Question 20

Recommended Depths of Cover

Answer 20

Daily = 0.15 m
Intermediate = 0.30 m
Final = 0.60 m