Document oejb7o8moRZGZgzVNgednRY6X
AR226-2432
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*" 08/06/93 08:19 AM
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To:
RAMSEY. EtCHSTTL
cc:
PLAYTIS, KENNEDY AT A1 AT HSKVAX . R1TCHERL AT ISCDCVM2 , ALLENJB AT A1 AT
WMVX , STEWART
Sub)ect: C-8 in site drinking water
The attached communication puts some perspective on the recent results of C-8 in our site's drinking water.
Roger.
EID086187
-0052592.txt
C-8 IN WASHINGTON WORKS DRINKING WATER
Recent sampling of the four Is have shown C-8 levels of 0.1, 0.5, 2.9 S
are surprisingly high but do not pose a
Washington Works drinking water wel
3.3 parts per billion. These values
health threat to our employees.
The allowable exposure level of C-8 for our employees is set by
our corporate
AEL.
This
level
is
0.01
mg/in3
or
0.56
ppb.
This
is
an
airborn
e
control level. A control level for employee drinking water has not been set
because such a control level was not deemed necessary.
Exposure to C-8 is best understood by examining the AEL on a da
If ily dose
level basis. At the AEL an employee
dose of
0-10 mg of C-8.
an employee were
3.3 ppb he would only be exposed to a daily
can be safety exposed to drink water with a dose of 0.006 mg-, or
to a 12 hour C-8 level of
l/20th of the
AEL
(note:
C-8
is
essentially
fully
absorbed
by
the
human
body
if
breathed
or
consumed) .
At this time all operating areas on site are in compliance to fc
he AEL
for airborne
C-8
exposure.
The
slight
additional
exposure
imposed
by
dr
inking water with
C-8
levels
of
3-4
ppb
should
not
affect
our
compliance
to
th
e daily
dose of C-8 allowed by the AEL.
We should not get confused by the current CEG (Community Exposu
re Guideline)
for C-8
in water
of 1-0 ppb.
This
guide
level
is
for
exposur
e to the general public
and
not
for
the
healthy
workforce
here
on
site.
However,
this
situation
should
not
be
taken
lightly.
The
sitet
enviromental group and the C-8 team will endeavor to fully understand
hese
recent sample results and provide you with future programs.
Attached is the technical basis for the allowable dose exposure
Page 1
EID086188
levels from Haskell.
-0052592.txt
Page 2
S g
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EID086189