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Rehs > Landfill > Flashcards

Landfill Flashcards

1
Q

Average American refuse per day

A

6 lbs

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2
Q

Average American plastic per year

A

60 lbs

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3
Q

Rubbish inorganic or organic

A

Inorganic

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4
Q

Garbage inorganic or organic

A

Organic

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5
Q

Refuse

A

Includes garbage and rubbish

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6
Q

LEA

A

Local Enforcement Agency

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7
Q

Active landfill inspection

A

Monthly

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8
Q

Trench method

A

Used in terrain, trench is dug then filled with solid waste and covered in soil

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9
Q

Area method

A

Most common, solid waste is placed on the side of the hill or slope

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10
Q

Valley of ravine method

A

Naturally developed large depression or slope

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11
Q

Landfill classifications

A

Class 1: hazardous materials (waste)
Class 2: low levels haz mat
Class 3: Municipal solid waste (no haz mat)

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12
Q

Leachate and methane gas generation

A

Produces leachate and methane gas

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13
Q

Landfill cover methods

A

Daily cover, Intermediate cover and Final cover

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14
Q

Dail cover

A

6 in of compacted soil at end of day, prevents fly larvae emergence, alternative daily cover

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15
Q

Final cover (foundation layer)

A

24 in of soil, approved alternate final cover design

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16
Q

Intermediate cover

A

12 in

17
Q

Alternative daily cover (A.D.C.)

A 
Tarps (geosynthetic over)
Green material (not used often)
18
Q

Purpose for land fill covers

A

Odor control, vector control, prevent waste from blowing off site, fire prevention and prevents scavenging

19
Q

Soil type

A

Sandy loam (compatible mixture of soil and sand)

20
Q

Landfill ideal slope

A

2:1 is 50%

21
Q

Final closing slope

A

3:1 is 33%

22
Q

Decomposition aerobic or anaerobic

A

Aerobic

23
Q

Decomposition length

A

Aerobic: 4-60 days
Anaerobic: after 60 days

24
Q

Gases produced in anaerobic decomposition

A

Methane (CH4), Carbon dioxide (CO2), Hydrogen sulfide (H2S)

25
Q

Settlement monitoring

A

30 days

26
Q

Settlement occurring

A

During first 5 years (90%)

27
Q

Structure building over settlement

A

No, can collapse

28
Q

Leachate

A

Liquid that passes through a landfill

29
Q

Refuse collection frequency

A

Based on fly breeding, temp and humidity

30
Q

Active compost temperatures

A

50 C or 122 F

31
Q

Active compost temperature to kill fly larvae

A

Greater than 131 F

32
Q

Composting methods

A

Windrows, aerated static piles, PFRP (Process to further reduce pathogens)

33
Q

Windrows

A

Rows of compost piles, 131 F for 15 days and turn it 5 times

34
Q

Aerated Static piles

A

131 F for 3 days

35
Q

PFRP (process to further reduce pathogens)

A

Starts when piles reach 131 F

36
Q

Good soil colors

A

Brown, red

37
Q

Bad soil colors

A

Black, blue

38
Q

Erosion control

A

Universal waste (e-waste)

Rehs (14 decks)

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