Table 16
Summary of Features of Sediment Covering Materials
Specific
cost
Application
Permeability
Gravity
Material
Weatherability
Difficulty
$/ha
to Gases
Comments
0.95
Poor
Black
4,600
High
Impermeable
Easily dislodged,
polyethylene
vents permit plant
growth, "balloons"
Excellent
59,270
Moderate
Hypalon
Impermeable
Strong, effective,
"balloons"
Good
Polyvinyl
22,194
Moderate
Impermeable
Easily dislodged,
crumples, effective,
Good
Low
8,000
Polypropyl
0.90
Effective
Good
Low
Aquascreen
21,500
2.54
Permeable
Highly effective,
easily removed and
Poor
Burlap
Low
3,400
Permeable
Effective, "bal-
when
loons,"
placed on highly
organic muds
Fair
8,000
Moderate
Impermeable
Effective,
"balloons"
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