Document 37eO4x64YwjJeL8OrJ6Xobqo0
AR226-1972
CC; R. J. Burger
D. A, Erdman L. W. Goin E. D. Johnson G. L. Tracey G. l>. Herridge C. A. Robinson
3. L. Barnes
A. r. Shepard
P. Thistleton D. L. McGui
jiichrist File; 1.1.7.4
TOi FROM:
April 14, 1981
J. P. HOMT/R. J- ZIPPEI.
Aft. SJL^JL. A. R. BEHNKE/D. G. DEEM
PROGRAMS TO- REDUCE EMPLOYEE C-8 EXPOSURE
Below is an updated C-8 program list arranged by
priority for reducing employee exposure,
f
Priority is based on the need to eliminate hot
P
dust and process vapor sources first based on what has
been learned from air samples taken after the major building
dust cleanup.
Ream'fs'. From Majoy F-EP Building Cleanup
II. Area air samples taken across the plant (March)
after the cleanup indicate no change in area C-8 levels
from before the cleanup (February). See Tables ARB-I &
With over 95% of the gross dust removed from the
area, the constant C-8 levels indicate that airborne C-8
generated from hot process leaks and possibly circulated
by the building H & V system is the source of the problem.
Samples taken during dusty operations were lower than
anticipated. While the old dust was not the problem it was
expected to be, its removal was necessary to uncover the
source of the C-8, provide reasonably "clean" baseline data,
and reevaluate job priorities to emphasize the elimination
of hot process leaks and sources of hot, fresh dust in the
area, and upgrading the building H s V system and stack
elevation program.
^
t*i
<y>
oo to
EID077147
J. F. HUNT/R. tT. ZIPFEL
-
2
APRIL 14, 1981
II), Both the February and March data show substantial
improvement over data obtained in 1980, (See Tables ARB-X, demonstrating the effectiveness of the new housekeeping program and installed engineering controls.
The "AFTER" sample levels are equivalent to the
"BEFORE" samples only after the high values taken during
problems with Wet Finishing are eliminated from the data
(see attached sheet). For the February "BEFORE" case, there
were no major Wet Finishing Upsets which resulted in plugged
vent lines. For the March "AFTER" case, there were 11 incidents
of plugged dryer vent lines or decanter to V Disc press chute
pluges. Since levels were very low on March 9 after the major
spill on March 7, the spill is not believed to have affected
the area during sampling. However, on some days samples taken
on the 1st and 2nd floors appear very sensitive to upsets in
or around the clean room. The samples taken on March 13,
when we shut Wet Finishing down for Construction after plugging
the vent line, were very high. This makes me very suspicious
of the H & V system in the building. (Also, need to seal Clean
Room). The Wet Finishing Operator had a level of 1.92 mpb
j
with the problem yet the Wet Finishing Operator had a level of
0.72 mpb on the following Monday with no problems with Wet
Finishing operation* These/results, coupled with the high PK
Control Room sample of 1.71 mpb on the day of the major Wet
Finishing cleanup, points to a combination of problems which
include Wet Finishing clean room leaks, the H s V system, and
a combination of wind/weather conditions with low discharge
stack heights.
From the cleanup results and relatively low values taken in several areas with dust clouds present, the visible
presence of dust does not always lead to high C-8 exposure levels based on current sampling.
Programs/Priorities
With this information, X have divided all the jobs
listed for the C-8 program into 4 categories (See Table AKB-III);
EID077148
'-/
J. F, HUMT/R. J. ZIPFEL
-
3 -
APRIL 14, 1981
Programs/Priorities - (Continued)
o
Cool Sources - Primarily dusty operations at ambient
temperature (<40C).
o
Hot Sources - Operations/Leaks which occur with operating
temperatures above 40C or when vaporized
C-8 is likely to be present.
o
HSV/Stack System - Jobs associated with removal/dispersion
of C-8.
o
Passive _ - Primarily jobs which protect people but don't
reduce C-8 levels, includes both area and
personal sampling.
To reach our goal of getting the plant to 1/2 the
AEL by 12/31/81, Technical will have to concentrate on the
hot sources and the H&V/Stack program, while Production
follows up on the passive personal protection type items
and routine repairs. The cool but dusty sources must
"^
receive lowest priority based on what we have learned from
y/
the building cleanup sampling. Some balance and trade offs
between the categories will have to be made (ex.. Recycle
/'
Tank where everything is on order and design is ~ 95% complete).
All the jobs listed in the March 7, 1981, program letter are placed in one of the four categories with their original priority numbers on a separate page. Wew priority numbers with circles have been assigned based on the need to
eliminate hot sources first while maintaining some effort in
the other areas.. (See Table ARB-III).
While we do not have conclusive data with high C-8 levels on our roof, I am suspicious of the HSV system because of the high level recorded in the PK Control Room during the Wet Finishing cleanup*
II The following list of program items divides primary
responsibility between Production and Technical. The personal
and area sampling will be a continuing program. The short term
goal of the program is to establish baseline data for Wet Finishing operator exposure, clean room levels to insure that we do not exceed the 10X AEL level beyond which the Comfo respirator is not effective, and winans cleanup personnel
exposure.
EID077149
-3)
J. P. HDNT/R. J. ZIPFEL
-
4 -
APRIL 14, 1981
the major items comple-ted in March were the battery
of area "After Cleanup" samples and the decision to install
the tighter weave untreated polyester felt filter bags in both the wet finishing and coagulator bag filter housings
in place of either the Teflon treated or silicone treated
filter bags.
For brevity, a copy of last month's letter will no longer be attached to the monthly letter.
It To allow Technical to concentrate on engineering
controls, current programs have been divided into two groups, one with Technical having primary responsibility and the other with Production having the primary responsibility. Since
the first of the year, significant Technical effort has gone
into the passive portion of the program such as the major
Winans cleanup which we had hoped might reduce area air levels below the AEL, installation of the additional breathing air facilities, and the heavy personal and area sampling. appears that effort must now be concentrated on containing and
controlling the C-8 with special emphasis on the hot sources and the building H&V/Stack program.
Attachment ARB/nsw
EID077150
EID077151
zsT/./.oaia
^^1 *?
:
-0
:
'
'
? "
:
2 ^, t
:
? f- ? "
; i ;? S
^
i '
:
i
-
i
'
i
vo
1 S
^ 0
1
; ,0
,
1
? 1
1 ;
'
1
!
i
.^ '
\
i
""
:
j
; 1
1
i
i,
! !
i
i
i
i
t
!
:
l
' 1 ;
i
i
'
.
j ^ '
'
ta,
S
i
; ^. i
j
!.
! S
i
.1
t
1 ;
! sN;
i
1
lo. .\6'
;
;
i i
s
'
! ! |
.
',
! !
!
i
:
i
i
j .
f :
i
1
! :
,
:
N
j -;
l
'
:
i
!
; ;
i
.
.
i -
I !'
1
. '
: i
' ;
:
:
'
, .
i: ;; i
> .
-
<f
r-(-:t;t"c<'^I-^'-^ ^ 1 ! r ? ? '
C-,
^
<
-l
A
a
l
^t t ^ | ^ S i ? .
i j : ? -t
^^'^'>i^s. ^ f > ;
^s5^^ S ^ *
V
S < S ? ? ^"
<v
/
t
?
0
^
-
<
t>
2
''
S
a
X
.- .?
,'1
^ s. ? ' ^
:
' .
, '
. .
'.
:
*
^^ *
'
-
*
.
i ; ? '
;
'. :
.
' '
: ;
1 i i i.
.
t0
. ; : . ' it ; ; : :-. '? ;r-
; : ; i-S :6-; ;0'
?-
^
y i 0
y
0.
i'6
rt
r
i
j ; i j ' i ) n i i ' I
' :
i ,
i
;
'
'
i
;
'
>
:
1
;
,
i
|
'
j
i
i
r s,
fl3> S ^
% ^ &
-^ft B < S>
0
<^
"'
-
or.
i
: i
i
i
''
l
' i
;
! !
!
' !
; i
S -!
i
i i
t
i' i
|
' ;
i
I
(
! l
; ;
.
;
. .'
-
i
N !
;
i
'
;; i | |
'
; i
1?' IP; !0; 'W -<ri :1^
r l*": 1,
|^ - ^' So :o' 'a- .0; 'a^ ^ ^
.;
i
^
j
:iN-^ !'-(<I !
^
;'':
,'",
-
A
:
11 1 1 1 1 ! !
'
'
^;i;;( " C "I ;A
1 :
; ;
;-
i
^
& (-
;
1
;
:
*
'A.
^
o" ;A, ? 1?
t
1
t
;
'
? !t' ' 3 &
;
;"'
-l:
s S ! i --i !''.
?-
f^.^^, ^5, " L *
I^1'^ -o( o?i ca t!i "' s ,
$ ^ H f -' et l--l
i
'
i i ; ' ! ; !
1
i '
S
!
; { i
j
.!
1
! ! 11i : ;
i !
s '
;
i ;
! !
1
;
i 3i
i
1
; 1 [. * ;
I-* :- |~, =-i I J ^
.0
;
v,
o ^
. '^'. '.^' SA- A
S' i ,";
.^C-.O---^ :;
0
)
;-C ^
;o ,
0
-
.-''
S
0
;(0 \
te- /
.-
!1
,.. i
1
; l
i ,
!! i
\;) i
.'ii '
i
,
1
,
I- ' i
n
j
Ni'1' ii !
I
s
i
I.Sc
1 W
i
it i 1
i
1 !
;
J j i !i
^5
Tl
h
?
? >
D
? t
'S'
S .
I 1 f J j *
1
| :
;
,
S ;
i ;
'
:
i
! !
; S
i
;
!i i
! J
1 '!
!
i
;
!
1 1 N ! ; ! S
'
;
i
; :
1
: 1'
'ili :
1 i' j 1 1 ,t i :
j j
1
i !
:
'
i
i
: :
'.
:
'''. '' :
.
,
;
.
*
;
'
i. ! ! .
s
"
1
. i
1
i :
,
,
;
.
.
i
i
i
i
i 1 : i '
*
*
'
1
.
'
'
1
i
! j 1 '
.
)
I :
i
;
-
.
1
!
: I
,
! : '
i 1 !
:
; }
'
.
1 :
'.
'
:: : '
.':'*' l ' ! '
i
''.'-, 1
:
: .
s '{
t
:
i
[ i
: i;
\
'
| ; .
:
i
< ''.
' : '
'
;
'
: ;
i
<^
^ Ri ca
^