Landfills - Test II Material Flashcards Preview

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Flashcards in Landfills - Test II Material Deck (21):
1

A mixture of a listed waste and a solid waste is considered a listed waste

Mixture Rule

2

Any waste generated from treatment, storage or disposal of a liquid waste remains listed

Derived-From Rule

3

Any soil, groundwater or other material containing a HW must be managed as a HW

Contained-in Rule

4

Site considerations

1. Type of waste?
2. Phase of waste?
3. Who will the disposal site serve?
4. What is the site capacity?

5

Landfill Area

- Ac based on the area sericed by the facility
- Recycling must be considered in landfill area cal.
- How deep/high will the landfill waste be buried?

6

Landfill Area - Estimate Calculation

A = (27 V N ) / d

7

Defines the elevation of the deepest level of excavation at different areas of the landifll footprint

Base Grading

8

Landfill Permeability

Usually calculated w/ the Darcy Equation and media are oversimplified as homogenous materials

9

Polymer can be melted and on cooling it nearly reverts to its original structure

Thermoplastic polymers

10

Polymer that can be processed only once, bc further processing degrades the material

Thermoset polymers

11

Permeable geosynthetics composed of textiles

Geotextiles

12

Used for reinforcement

Woven geotextiles

13

Nonwoven geotextiles used for

Separation
Filtration
Drainage
Cushion

14

Textile formed by extruding molten polymer

Monofilament fibers

15

Textile formed by extruded polymer twisted together

Staple fibers

16

Textile formed by extruding continuous sheets that are the cut

Silt-film fibers

17

Geogrids

Geosynthetic materials that have large open spaces between ribs, primarily used for reinforcement

18

Corridors are provided for lateral and vertical migration of gases under natural pressure and convection gradients

Passive systems

19

gas movement is induced by negative pressure applied to the system

Active systems

20

General purposes of GW Monitoring

- Monitor linear integrity
- Monitor runoff infiltration
- Monitor GW flow
- Early detection of leaks
- Hydrologic info

21

Draw a cross section of a typical hazardous waste landfill construction prior to facility closure

See PowerPoint**