D.
Air Filters
Only the glass fiber filters are weighed.
They are assayed zravi-
metrically for mass loading as well as chemically for Pu accivity.
The
microsorban filters are jusc evaluated radiochemically for Pu acrivity.
Weighing Procedures:
l.
Place the air filters on the racks and heat overnight in the
large oven in Joe Steimers’ lab (sec at 80°C).
2.
Let oven cool for at least 4 hours witn dessicant at the bottom
3.
Use
before weighing the filters.
the baffles actached
balance in Joe Steimers' lad.
glassine envelopes.
£0 both side vindows of the Mettler
Weigh the filter, the necessary
4.
Make sure to weigh and store in a safe and clean place CONTROL
samples of all types of filters and glassine envelopes.
Note:
The rationale for the glassine envelope is as follows:
Should the sample flake off from the filter while
handling and shipping in sizable amounc, the enve‘lopes are analyzed along with che filter.
5.
The same procedure is used for analysis of filters after use in
the field.
Soil Sampling Associated with the Air Sampling Program
l.
HASL Sampling
Take two 2.5 cm downwind and in frone of the sampler for soil
moisture determination.
Label with date, location,
Package sample securely in a plastic bag.
and label in a second plascic bag.
2.
etc.
Place bagged sample
Hi Vol Sampling
(Same as above).
3.
Andersen Cascade Impactor
Do the same as above only if the ACI will be sampling for an
adequate amount of tine for radioassay for Pu activity.