Document 6Rrza4dyM1dkBvNmgpajKDz9d
'1-2
\ i ^ ^ 7"% - - i. :--..> ^ - -
t ; ,*s u ' 'w' i~v /> v .< *> . .
- : <
*(* (e)
f \I
. V_/
'opii e,
O.v.s =n L3ca;>oo
K. 0. Hopkins 400-1
514
P. F. Bonham, 512 W. V. Filipek, 514 c. R. Johnson, 512 H. McHenry, 613 L. R. Noble.^512 T D. R. Paugh, 512 J. W. Perry, Jr., 512 P. P. Price, 512 E. c. Shipley, 512 H. L. Robinson, 511
30 JTH :HA.^L3T
^J '^
Or: v.i>: .7 -'I
December 17, 1980
IH/EP
Construction Employees Dust Exposure Monitoring - Alloy Furnace Job
Dear Mr. Hopkins:
Dust samples were taken over a ten-week period at the Union Carbide Alloy Plant where Carbide Construction craftspeople were dismantling and rebuilding furnaces 3 and 7. Based on the OSHA standard for nuisance particulate, i.e., 15 and 5 mg/cu.m for total and respirable dust respectively, none of the thirty-four samples showed excessive dust for people working in the area.
However, there is a ladle lining operation at Alloy near these furnaces which involves the use of crystalline silica. Samples taken on October 16 near the #7 furnace east and west of the furnace showed an average crystalline silica dust content of nine percent. The OSHA allowed exposure for dust containing nine percent silica is 1.5 and 0.9 mg/m^ for total and respirable dust respectively. At these lower levels some of the workers would have been overexposed.
Rather than depending on two values for crystalline silica, several more samples were taken on December 11. When these results are available the exposures will be re-examined with respect to crystalline silica content.
It should be remembered that, while some values were high for one day, the TWA allowed value is considered a safe level for dayafter-day during a lifetime of work. So, even if these values found were above an OSHA value corrected for silica content, it does not mean that adverse health effects will accrue. Also, since
UCC 016558
-2-
12/17/80
many samples were taken on different days and at different places the dust collected in each of the thirty-four samples taken may not have contained the crystalline silica indicated.
GFH/sc Attachment
G. _ Industrial Hygienist
ACKNOWLEDGMENT
We appreciate the excellent cooperation of the craftspeople with respect to wearing the required samplers and pumps to take the measurements. Mr. McHenry of the Alloy Plant helped in moni toring for crystalline silica which was determined by the UCC Metals Division at Niagara Falls.
UCC 016559
ALLOWED
' OSHA
EXPOSURE -
11 1
CQ CO
05 05 05 05
05 05
05 05
05
C'-
CO t>
CM O
<M 1 CM 1
CM CO CO
05
CM CM m 00
rH
co
m CO CM o O
m CO pH CO
Mi
05 pH
rH o
rH rH i CO i
O H
TWA
SAMPLE
DUST- TOTAL(T) mg/nT RESPIRABLE(R)
MINUTES
( 1 )B a s e d on 9% c r y s t a l l i n e s i l i c a c o n te n t o f d u s t.
DESCRIPTION
E-i E- Eh eg Pg PS PS PS PS PS PS PS Eh Eh Eh Eh
C- t> 05 CO
05
00
o 00 oo CM Mi CM o rH
00 CO rH m m m CM CO
in CM
CO
00 00 CM 00
rH rH rH O
rH O
rH O 00
CM o
CM CM r-i i--i
.
CM CM C(DM C(DM
11
CO CO
0 a d
Oe(Dg
aa
P3i P3i
SH H
S5 m
eg 0 Pi <
<e0P5gi
00 Ml CO Coo 05 05 05 oo
CO CO CO CO CO
^o
Tl
1p
p0 a" 0is o .i hO CD
T<3D
H
CO P3O
C3D
rH
CO +3O->
TCCr3ODl -O3P
TCJD
rH
CO P3 O
"rOH Oeg
CQ CpOH
3P3Hi
P(C0D t>
PCO CD &
PCO CD &
-CPO CD ps o
O%
tfc
00 pOg
. crol e>g Q
neb33tof cti >
P0ai
JoiHd
pi S3
ooo Se5g
d d d Ph < eg Ph Eh eg d
CO CM l> CO
CO Ml
M< CM i--1
Mi Mi
CO O Mi
rH i--1
C>CDD
i--I
CD r>0H
0c 3H
PCO -CPO PHi urH
eg
CM I0SI
ooH
oo
1 pH s pg PS
CO =tfc
C=tOfc
CO
o:tfc
t> %
>. P0i
osoo
rsHs C3
po 0cS o
PO0ai OO
0
p0H opi
pm S5 < Ph -3 6 Eh pg d
00 00 CM CM CO co CO
CO CO CO CO
rH
a C>D
r33e0Hg O
r0H rP0H
11
CCMM 0 e i
03 3rH eg CNM 0
0 e3og 3Pi
0 e33og 3
Ph
0
o e3g P3i
Ph
1 p0 P0S
CMOfc CO C=tf-c C
3
rH a3d
Xc3tf 3hdO >
ctf ccS
d HH
0
Pi <
Eh
0Pi <
OO
00 00
\N
05 O
CM CO
\\
05 G5
O 00 \ CO \ o 1--1
UCC 016560
o 00
\ 00
\ o rH
SAMPLE
DATE
rH
w o w
w. u o PS 53 -Q !=> CO i-Q CO o < 2
X
w <
Eh
OS OS 1o
CO rH in CO 1o
OS os os os OS
rH rH CO r00 00 cs oo
CO rH rH iH o
OS os os os OS
O CO CO O M* t>
rH
rH
CO
os os os
oo
rH rH
TO TA L(T) R E S P IR A B LE (R )
( ^ B a s e d on 9% c r y s t a l l i n e s i l i c a c o n te n t o f d u s t.
h3 ft
s < co
CO Eh g W\
tD bD
QS
CO w Eh
&
J--l s
55 O M
Eh
ft M cs o CO PQ Q
W & S <3 CO
Eh PS PS
PS PS PS PS PS
PS PS PS PS PS
PS PS PS
C- rH rH rH t-
r-i o
rH co o cm IN CM CM co m rH
CM CM CM rH
CM CO in in CS CM in cs in l>
rH
os CM CM
rH rH
CM 00 in CD co CO co CO
rH 0
0s
> H
00s
3 rH
eg
H N
s p N
eg CO 0
a rH
s
N o
|
1
B
00 | oo
Cg eg
+J s s
co eg
3Pi
u3
w pM P'4
CO ttfc
rH rH
0 (4 X! 0 O ft Po rt o so
eg 0
tS
pH
<! w PS
oo m CM m (N 00 oo 00 r~ co co co co co CO
m m in co cm os os oo oo fco co co co CO
rH rH rH rH rH
rH rH rH rH rH
0 0000
000 00
> > > > > > > > > >
0 0000
0 00 00
rH rH rH rH rH
rH rH rH rH rH
3 3 3 3 3
Pi U Pi Pi Pi
CO CO CO CO CO
3 3 3 3 +j
3 3 3 3 CO CM CM CM (M rH
1 |1I1
11 1 1i
0 0000 o 0OOO
eg cS eg d eg
3 ss3s
3Pi 3Pi 3u 3Pi 3Pi
Pm P'4 Pm P'4 pti
0 00 00 O 00 O0
d eg cS eg eg
3 3 3 33
3Pi 3Pi 3Pi 3Pi 3Pi
P'4 P'4 P'4 Pm Pm
C o r> -tfc =tfc =tfc =tfc
t> r-~ i> =tfc =tfc
.M
03
rH d
CO Pi J3
rl
>
CO CO
rH
3
.Q
B
bfl
3
eg Q
PoS
eg ft
a
53
5e>g
hi Q < hi
Pm PS IH PQ Eh
- 30
CO
JeSg
rH
Pi
rH
>
CO CO
b3o
JQ
B
rH
3
eg Q
o PS
eg >
5d3
eg ft
.i hi hi < Q
ft PS H PQ H
co in rH ooo
rH rH rH 000
>>> 000
rH rH rH
333
333 OOO 000 000 co C/2 CO
> =tfc tfc =tfc
CO
IS
33 3
rH
3
eg
o 3 CS 0
5 ft s
W Q ft
< hH o
O oo \ w oo H\ <o Q 1--1
oo oo oo \\ co rH CM \\ oo
rH rH
UCC 016561
o oo \ CO
rH
\
rH
rH
rH
-Q
W
M' Pi
a
03
2
X
H
gO fa J 03 .-3 O<
'
< 3= Eh
<35 <35
in <35
oO
<35
`i11
<35 t- 00 CO 00
Is- co CM o rH
O
w
CQ
E-. <
Pi
i-3
H
a
53
< CO
CO
Eh g W\
3 b|
Qg
03
H Eh S3 55
Pi Pi
(.0 rH
O iH
05
O) 05
CO CO
Pi Pi Pi Pi Pi
CD <35
00 CM
o CO o CM
rH
CM CO CM t> O o o 05 <35
CO CO
r--1 rH
0 <D
rH rH rH rH rH
>>
000 0 0
0) <0
>>> > >
55 1--1 i--1
000 0 0
O i--1 rH rH rH rH
i--i T3 O
Eh
SC
-P P P -P 4->
a o O 0 CO CO CO CO
l-H o o P P p p P
Pi
0 <D
rl iH H rH iH
o 03 03 PH
PH pH
03
HO
CO CO CO f-
Q =tfc =fc
Ifc =tfc
CO rH
0 g to rH
0
p ci S* 0 P P
oo
rl o J3 0 O
4- g CO rH
ci H
rH T3
0X
g
rH Ctf -P rH rH
H 0 iH
rl
w o o & 53 s
o
3 a
s < a h3 a r3
a
<3
02 > W o W W &
o 00
\
CO
a rH
Eh \ < rH
Q rH
o oo
\ rH rH
\ CM rH
UCC 016562
B a s e d on 9% c r y s t a l l i n e s i l i c a c o n te n t o f d u s t.
CO
<H
o CO
a