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PRC
Environmental Management,
Inc.
233
Worth
Michigan
A
verue
Suite
1621
Cnicago
IL
60601
3:2-356-8700
r
~X*
312-938-0118
March
11,
1991
prc
Planning
Research Corporation
EPA
Region
5
Records
Ctr.
200553
Ms.
Linda Kern
Remedial Project Manager
U.S. Environmental Protection Agency Region
5
230
South Dearborn Street
Chicago,
IL
60604
Re:
Final
Radiochemical
Ground-Water
Modeling
Report
Industrial
Excess
Landfill,
Uniontown,
Ohio
Work
Assignment
No.
21-5NW2,
Contract
No.
68-W8-0084
Dear Linda:
PRC
Environmental
Management,
Inc.
is
enclosing
for
your review five copies
of the
Final
Report
on the
Probability
of
Detection
of
Hypothetical Radiochemical Contamination
of
Groundwater
at the
Industrial Excess Landfill, Uniontown,
Ohio.
This report represents
a
compilation
of
information
and
data
contributed
by Jim
Benetti,
Air
and
Radiation Division,
EPA
Region
5; Dan
Ashenberg
and
Dave Donohue,
PRC
Helena;
A.K.
Singh,
EPA
Environmental Monitoring Systems Laboratory (EMSL),
Las
Vegas, Nevada;
and
Jeff
Ross,
PRC
Seattle.
The
Draft Report
was
reviewed internally
at PRC and by all
the-
parties involved,
and
review comments
have
been incorporated into this document.
A few
statements concerning health risks
has
been added
and
should
be
reviewed
by Jim
Benetti.
r
Due to
hypothetical nature
of the
study,
the
PLUME modeling results
are
estimates that
have
a
fairly high degree
of
uncertainty. Based
on the
assumptions made concerning
the
source
location,
these results
are
nonetheless
conservative,
and
should result
in
minimum probabilities
of
detection.
The low
activities
of the
radiochemical compounds modeled also indicate that
the
sources modeled
are not of
health
concern.
Jim
Benetti
may
want
to
expand
on
this aspect
of the
results
and
combine
it
with
previous
PRESTO code modeling.
If
you
have
any
questions,
please
call
Jerry McLane
at
312/856-8700
or
Jeff Ross
at
206/624-2692.
Sincerely,
Majid
A.
Chaudhry,
4>h.D.,
P.E.
Project Manager
enclosure
cc:
Carl Norman,
PO, EPA
Region
5
(letter
only)
Bob
Conner,
PO, EPA
(letter
only)
Dan
Ashenberg,
PRC
Jerry McLane,
PRC
Jeff
Ross,
PRC