5 toto′6'
5 6
33to 4′'
to 4
3 to 4'′
3 to
1 to 2'′
to 2
Figure 16. Thickness of protective soil layer required for compacted clay covers.
Table 4. Analysis of the value of waste storage space.
Cost of storage space (00)
Glebs*
Glebs*
SCS*
SCS*
Dell*
Average for
Category
1988a
1988b
1989
1990
1989
five studies
Before development
2,785
592
7,260
6,681
891
3,642
Construction
8,728
5,690
25,565
77,910
4,171
24,413
Closure
2,475
147
2,452
9,777
1,315
3,233
After closure
9,120
1,835
5,526
5,526
7,500
5,901
Other†
7,150
407
69,949
119,369
0
39,375
Total fixed costs**
30,258
8,671
110,752
219,263
13,877
76,564
Capacity (million tons)
2.86
1.42
6
5.4
2.6
3.7
Capacity (109 kg)
2.59
1.29
5.4
4.9
2.4
3.4
Size (acres)
74
50
80
80
14.7
59.7
Size (ha)
30
20
32
32
5.9
24.2
Fixed costs ($/ton)
10.58
6.11
18.46
40.60
5.34
20.94
Fixed costs ($/tonne)
9.60
5.54
16.74
38.62
4.84
18.99
Fixed costs (00/acre)
409
173
1,384
2,741
944
1,282
Fixed costs (00/ha)
1,010
428
3,421
6,775
2,333
3,169
* From Repa (1990).
† Includes interest on debt, profit, etc.
** Excludes operating costs
Canadian border region. Under the fifth column
the region of the U.S. normally requiring 16 ft
heading is shown a cost savings of about ,000/
(0.31.8 m) of frost protection. Under the sixth
acre (,000/ha), attributable to the increased
column heading, we see that the total cost saving
storage space caused by the reduction in thick-
is greater than 0,000 in the populated regions
ness of the hydraulic barrier, even when there is
of the northern States and that it can exceed
no decrease in the thickness of the protective layer.
0,000/acre (4,000/ha). Finally, under the
Also under the fifth column heading in Table 5, we
last column heading it is shown that the cost sav-
can see that, for the most northern part of the U.S.,
ings for a 20-acre (8-ha) landfill can be ,000,000
the cost savings attributable the increased storage
in a region just by eliminating 2 ft (0.6 m) of frost
space exceeds ,000/acre (3,000/ha) of
protection and using a GCL hydraulic barrier sys-
landfill. The cost savings range from ,000/acre
tem in place of a compacted clay barrier.
(,000/ha) to 3,000/acre (4,000/ha) for
The cost savings in terms of the total fixed costs
18
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