(island), planned use, economics and the AEC/ERDA Task Group reconmendations, 1
will be recuired for each of the islands where contamination is found to
Z
exist.
3
The resulting evaluation should lead to one of the four following
conditicns which have been recommended by ERDA.
{1}
Condition A.
4
When an assay areal is determined by
5
either direct measurement or extrapolation, to exceed 400 pCi/ g (at
6
the 67 percent confidence lever” ), the following actions will be
7
taken:
8
(2}
The area will be fine surveyed and isopleths drawn
9
which define the region which exceeds locat background.
(b)
10
Vertical soil profiles will be taken to evaluate
ll
the effectiveness of excavation as a means of reducing the resuspension
C
| potential? .
13
(c)
An iterative excavation plan will be executed to:
14
1.
is
Reduce the assay area average concentration
below 490 pci/gls.
"16
2.
Reduce the average concentration of the "defined
17
region" to some lower mmber which shall be determined by cost-benefit
18
considerations but will usually not be below local background.
(a4)
|
decimented.
|
(2}
|
12
= 19
The region will be resurveyed and the results
20
|
Condition B.
2
When a half hectare is determined by either
22
direct measurement or extrapolation to exceed 100 pCi/g (at the 67 per-
23
cent confidence level}, the following actions will be taken:
24
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