Document Dvxwp0pjy9r5MjG2Z7qeEJ85
AR226-2432
mw|Wiv
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ZIPFEL
08/06/93 08;1g AM
To: RAM SEY, EICHSTTL cc: PLAYTIS , KENNEDY A T A1 A T H S K V A X , RITCHERL AT 1SCDCVM2 , ALLENJB A T A1 A T
WMVX , STEWART Subject: 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,
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~0052592.txt
C-8 IN WASHINGTON WORKS DRINKING WATER
Recent sampling of the four Washington Works drinking water wel
shown^C-B levels of 0.1, 0.5, 2.9 & 3.3 parts per billion. These values
surprisingly high but do not pose a health threat to our employees.
The allowable exposure level of C-8 for our employees is set by
corporate AEL. This level is 0.01 mg/m3 or 0.56 ppb. This is an airborn
control level. A control level for employee drinking water has not been
sst because such a control level was not deemed necessary.
Exposure to C-8 is best understood by examining the AEL on a da
level basis. At the AEL an employee can be safety exposed to a 12 hour
0.10 mg of C-8. If an employee were to drink water with a C-8 level of
he would only be exposed to a daily dose of 0.006 mg., or l/20th of the
A.EX> (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 t
h AEL
, ,, j
for airborne C-8 exposure. The slight additional exposure xmposed by dr
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
JC 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 siteenviromental group and the C-8 team will endeavor to fully understand t
ll&S recent sample results and provide you with future programs.
Attached is the technical basis for the allowable dose exposure
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levels from Haskell.
~0052592.txt
UZ0U697
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