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2. Although the AEC Task Group recommended that contaminated debris be eof
" removed, they did not specify any numerical quidelines for defining materials
as either contaminated or noncontaminated. No material is totally devoid of radi
activity; however, the AEC Task Group clearly did not intend that every item of
material should be considered as a radioactive pollutant unworthy of remaining ~~
on the Atoll after Cleanup. Some level of radioactivity below which debris ~~74'4
‘should not be regarded as "contaminated is proper. This is particularly
appropriate at Enewetak since the general background to remain after Cleanup
will in many places be greater than the radiation level from any individual
item present in the area.
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3. The EIS specifies that unuseable noncontaminated debris programmed
for removal as part of Cleanup will be dumped into the Enwetak Atoll lagoon,
while contaminated debris will be entombed in an existing crater on Runit (Yvonne)
To avoid the possibility that any contaminated debris from the northern islands
might escape detection and find its way into direct use by the public, all debris
“removed from the northern islands will be sent toone of two places--thelagoon >
or the crater.
Since no Federal or International rules and regulations are
directly suitable for differentiating which of the two places should receive”™’
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any specific item of debris; i.e. there is no universally accepted definition
‘of "contaminated, " Cleanup will arbitrarily employ the following guideline:
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‘ If a gamma exposure rate exceeding 100 yR/he is measured on or near
an item of debris which is removed from a northern island, the
item will be entombed in the Runit (Yvonne) crater; otherwise,
the item will be disposed of as noncontaminated debris in the
Atoll lagoon.
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4. Although most debris will be removed from the northern sector, not all
need beremoved; e.g. debris which is neither contaminated nor a safety hazard”
-might be left. The decision_to classify an item of debrisas ‘noncontaminated
and to be left would not be made as casually as that of sendingit ‘to the crater
‘ or lagoon since a mistake in the latter decision would be less likely to cause
an adverse impact than a mistake in the former decision. Thus, before a final
decision is made to leave any debris, the debris will be monitored thoroughly
in accordance with the criteria contained in Reference 43. e.g., removeab}e alpha
and beta contamination must not exceed 20 dpm/100 cm? and 200 dpm/100 cm“, respectively. Since the guidelines of Reference 4 explicitly excludeitems
which are activated, and activated debris is common on the northern islands,
Cleanup will also adopt the following guideline for deciding if debris might
be left on a northern island; ,
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If a gamma exposure rate exceeding 15yR/hr_ occurs within a distance
‘of 30 cm from any point on an item o
ebris, then the itemmust
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appropriate, based on criteria in paragraph IT1IB.3 above.
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