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Recovery of plutonium soil concentrations greater than 400 p€f/s
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Pu at any depth these levels are found.
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The justification is that
plutonium at some depth may one day be at the surface. Also,
of
recovery/contaminated soil sufficient to reduce surface
levels to a value well below 40 pCi/g 239,240),
thet
justification is to keep air concentrations of resuspended plutonium
to levels well within national and international
standards.
After soil removal, all areas should be resurveyed to
f\ ensure no pieces or hot spots of plutonium remain.
\y’
ae
€) finearea observed to have pieces of plutonium and the highest
es concentrations is the interior and shoreline of the island
| beginning
at a line drawn from the ocean reef to lagoon 60 meters
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\north of the tower (Hardtack Station 1310) to CACTUS Crater.
8.
Plutonium contaminated soil on IRENE should be handled the same as
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on YVONNE and using the same criteria for removal except it is not
ct
expected that Pieces of plutonium| metal will be found.
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a xest plantings of pandanus; breadfruit, coconut, and a Yowroot should
be made, as soon as growth can be assured, on each of the islands om,
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jubsehothese_plantsaxe to-be—grewne As’edible parts of these plants
become available, their concentrations of 90, 137 6. | 239, 24054 and
any other significant radionuclides should be measured and compared with
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the pddiological ‘Sirvey predictions.
These studies will provide for
a determination to be made of the earliest time at which planting of
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food and. commercial Crops can be madegv
10.
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An underground lens water sampling and analysis program should be
conducted in which samples are taken over a period of at least 12