_~
CHAIRMAN MOSELEY:
Can we come back to order and resume.
Could we
continue with the presentation on the soil sampling.
DR. HAWTHORNE:
This
is a schematic (HH-1) of how the sample gets
_moved through the processing scheme in the laboratory.
~~
ee
and
The scheme is a hybrid.
It is partly how EML recommends doing samples
it
did
is
partly how REECo
soil
sample
preparation
for
the
NAEG
program.’ :
We wanted:to take components of each methodology.
We liked the REECo
part where thegr inding is carried out in a closed container so that there
10
is no chance of; cross contamination of either the laboratory or nearby
Ll
specimens and there—were particle size requirements that came from the way
~_
12
EML does their processing.
—
.
eee
13
We were initiallyanticipating that we would not have to process the
14
entire sample because in the fourth increment at those places where we have
15
a 10-30 centimeter increment ;—the weight of the specimen can be up as high
16
as 30 kilograms and that is a lot of< material to put through a little round
1?
screen.
~~"
_
18
We believe we have successfully combined portions of each of the pro-
19
cedures into a system that can be effectivé—Both in the processing context
20
and efficient in the manpower requirement.
21
please.
22
Again
I
have
divided
23
smaller groups (REECo 30).
24
doing the processing.
the
different
Could I have the other slide,
steps
in
ee
the
processing
into
These are the preparation before you begin
The processing itself is eattedball-milling, which
25 _ will-have an obvious derivation of name.
Then we drop down to the exciting
26
part which is removing the aliquots for radiochemistry ‘which js what all of
27
the activity is leading towards and, our final step is again
28
most important one, and that is cleaning up the equipment before you start
141
probably the