Battery-operated pump
In-line conductivity meter
T-um filter
Tygon tubing
0,4-um filter
Ground level
Unfiltered
sample valve
M4 “—Water level
15-gal drum for
radionuclide samples or
one-litre containers for
stable-element and nutrient samples
Fig.
2.
Diagram of the pump arrangement for collection of groundwater samples.
monitored during pumping by channel-
analysis of chlorinity and other
ing the water through an inline con-
constituents.
ductivity meter.
passed
O.4-\im)
The water then
through two filters
In an experiment we designed
(l-lim and
follow the chemical and radiological
changes in the water resulting from
to remove suspended particu-
late material;
these filters were
continuous
pumping at
a
constant
subsequently analyzed for radio-
rate, groundwater at HFH 1] was
nuclide
pumped out continuously over an 8-hr
content.
collected
The
filtrate was
smaller
period; a total of 3200 litres was
for radionuclide analysis
in 15-gal black "“Deldrum"
volumes
were
1
containers;
collected
removed
We
663
from
the
reservoir.
Con-
ductivity was monitored throughout
for
-5-
eee
to