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DRAFT
appropriate identification tags and readied for shipment to LLL
they underwent preprocessing and gamma-spectral analysis.
where
Plutonium-239, 240
and strontium-90 analyses, were performed by wet chemistry methods at McClellan
Laboratory.
A complete report on the analytical procedures has been
published (3).
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Bikini Ground Water Program
Purpose:
The ground water program was designed to establish a network of
well locations on Bikini and Eneu Islands in order to assess the ground
water quality and to systematically study the hydrology and geochemistry
of radionuclides, major and trace elements in the ground water system.
_ Water movement and residence times were to be assessed to deduce the
transport rates and mechanisms of radionuclides deposited in the soil zone
or taken up by vegetation.
Methods and Measurements
Seven holes were drilled with a ground power auger at selected locations
along the centerlines of Bikini and Eneu Islands.
Pits were dug with a
backhoe to a maximum depth since the ground water reservoir surface was
approximately 2 meters below the ground surface.
The auger penetrated
the ground water lens to a depth of approximately 3 to 5 feet.
Each hole
was cased with slotted 2" diameter PVC pipe which was extended to the soil
‘surface.
The pits were backfilled to minimize environmental impact on the
area.
The first hole was located near the island center.
The salinity of
the water was measured with an in-situ conductivity probe.
Two holes were
then drilled to bracket the center hole and the salinity measured in each.
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