Document KGXDyNpJy39egorLxExLgzR9Q
TSTRA ETHYL LEAD PLAHT
February 13, 1231
DR. Sf. S. DEUEL:
A series of experiments was made in 3 Plant r?o determine the amount of lead exposure encountered in various places.
Tbs procedure was the same as that used in previous determinations, the details of which can be obtained by referring to the reports which have been submitted in the past.
The data obtained are listed on the attached sheet.
The results indicate that progress is being made toward reducing lead exposure in the satire plant. Ths still floor of the main building shows a decided improvement. The alloy and smelter show some improvement, especially around the grinders (while filling the hoppers), and at the slagging door of the furnace. The points of greatest exposure during those Investigations seemed to be on the fourth floor of ths main building and in the alloy building generally. The fourth floor exposure apparently is due to diffu sion from the enclosures, during the period when the angle valve is open. Exposure in the alloy building is Quits general, due to the presence of lead dust almost everywhere. The operations of casting and grinding seem to be the most hazardous due to lead fume from the hot alloy in the first case, and to occasional bits of alloy dust getting into the air in the second case. However, in both instances the heavy lead particles&ettle to the lower levels eo that a man st&nding'srect is subject to but little of the total lead that escapes. This continual diffusion from casting and grinding accounts largely for the lead dust which can and does accumulate in most places. The operation of slagging in the smelter has'previously been the greatest source of exposure in this building. The use of an improved hood over the slagging door seems to have reduced this hazard to a minimum. The exposure in other parts of the plant la intermittent and is chiefly due to emergency conditions requiring the dismantling-of equipment, etc. The degree of exposure can be kept to a minimum in these cases by strict adherence to the safety rules that have been formulated by the Area and the Plant.,
Xh general, it may be stated that the lead exposure in S Plant has apparently been reduced since the last series of tests. Contributing factors to this reduction are the installation of new mechanical safeguards,improved equipment, and effective safety education of the operating and mechanical departments. Attempts to stills further reduce the hazard of lead exposure are being
Place
Time of Him
B Bldg,
first floor
By u cent*rifugal P*a ump 2<^4SiL hIr* s
ii
ii 24
Lewis Pump Si (top)
?4 a
it
$ V! t* t?
a 0 it
it
a
#1 (top) 2 (top)
24 24
#1 (bottom) 4
pi ( * #2 ( *
) 24 ] 24
a a t
a
Second floor: Filt srs
ii
ii 5i
Leigh
ii--j'bw
24 0 24 is 24t s*
>
24 fi 24 a
it
24
24
lliird Floor;
~fop~l~TS
rl6 ri6
vlS
n5 *15 H5
111
#14
#13 #13 Floor by aa aa
Fourth Floor; Inside enclosure 15
if w
R
16 *
a
# 13^
By door enclosure 13 * 13
*.
h
* a
13
13 13
Floor bet.13-13
a* * /* i*
i.O
n3r 24
ts
24
24 a
24
24
24 a
8s
24
1.6 8
24
24 48 a 48 it
8 16 24 i! 24 24 rt
2a
24 # .4$ * 24
S S
24 *
Vol.of Mr
Amount of Lead
430 liters X44o *
l44o
1440 51 l44o *
1440 l44c * l44o 1440 *
>.0001 grams .0001 .0005 .0010 .0050 .0010
.0005 . 000s >.0001
144c 1440 144g
450 X44o 1440 1440
1440 1440
1440
a a s a s a a
ts
.0001 >.0001
.0003 <.0500 >.0001
.0002 > . 0001
.0050 > .0001 >.0001
480 S60 11*T4h*4iTm0V
1440 l44o
1440 1440
1440 480
1440
.560 1440 l440 2880 2880
it .* si ft
A
Vt
a
e St
it
ii n a a
'480
960 1440 1440 1440
120
1440 2880 1440
480 480 1440
a
H
0 11 it a
0 rt
0
.0010 .0010 . C003 .0050 .0050 .0100 .0010 .0010 .0030
.0005 .0005 .0001 .0100 .0050 .0010 .0050
.0050 <.0300
.0100 <.0500 <.0500 <.0500
.0100 .0500 .0100 .0050 .0500 .0010
N9521.01
Plage r '
flag of Hun
Vol.of Air
FloorbetulS-lt
ft a
(1 ; \
11 16-14
# It
* X3-U *K
Rear
15
* 15
l }3 51 13
. .24-bgure 2*T: 24
24 24 24 24 24
24 24 24
1440 144q
3.440 1440 1440 1440
1440 144c 1440 1440 1440
Fifth nooar: Air duct by 15 * 13 8 8 13 * 13 Floor bet. I5-I3
* 15-13 8 13-11 13-11
24 24
24 24 24 24 24 24
1440 1440 1440
1440 1440 1440 1440
1440
Alloy Bldst.
First' floor: Grinder 3 (crusher)
a3
H3 a3
*2
* 2 .1:.
8
1
2 24 24'
24 24
8
8 8-
120 X44o
1440 l44o l44o
4-SO
480 480
Second floor:
Pan by grinder 1
2
.1 S'
* *2
8
8 * 2 14
Pot reov$2...
24
#2-'
24
*. *
'' . sg#.
24 24
8 #1
ft $0 :
24 24
#$
24
# #6
24
Floor by cooler ft
24 24
a pan 0
24 24
" bet.pot room ~X&H 24
24
m tt
24
120 430
430 9b0 1440
1440 1440 1440 1440 1440 1440 1440 1440 l44o 1440
1440 l44o # 1440 1440 1440
Aaiouot of Lead
.0005 .0005 . 0m0i07A.
.0010 .0010 .0010 .0005 .0010 .0050 .0010
>.0001 >.0001
.0005 >.00rN0z-1i4*
>.0001 >.0001 > rv~*rvl
.0001 .0005 .0001
.0610 . 000s .0001 .0010
>.0001 >.0001 >.0001 7*. 0001
.0010 .0050 .0005 . 0005 .0010 .0001 .0005 .0003 .0010 .0050 .0100 .0010 >.0001 .0010 .0005 .0100
Place
Time of Hun
Floor bet -pot roosssl-2 Bk- hours
Top Floor Top pot #1 #2
*|4} #6
24 c2M*4ii 2*7 24
HueIter
r I ggi np: si
tabl-je
(froV` nt)
n * (back)
' slugging: doer s
*>.tufige p It door
... t\'.>>!m16
Ki V W ontrol
3!
r-FF -:'i <*". jr-- i. '-v 'Oi P-a?
S.-'
1:
room ri
24
-'jf:
err
24
C.T
24 ?^4l * 2.4 24
Vol. of Air
l44o
1440 l44o l44o 1440 1440
l440 IOVh -Q
d.^T*r vj-
1440 1440 X44o 17.4. 4"isr4*hr0.y
1440 1440
Amount <
< .OpCO
O<w* w'VW'M !* -0001 .0005
# V#- w A
.0010
i.t* 0 A ftt r\A ->.0001 <.0300 old hood -0003 P-P-IC . fVY-^ >.000i >.0005 <.0500 .0050
tvrfcv*t
u w **
.?pf, jsj
fc A'-a erf
Place
% head
Top air duct {ael$er)
Top furnace Top stringer Floor
lp.0
4.o 10^0 22.0
Top grinder hood
Office floor First floor .Second floor
Third-floor
Air ducts (1st floor) * n ' (2d ; 8 * (jd
74.0
60.0 1?.0 73.0
23*0 46.0 52.0' 13.0
Special conditions such as changing, filter Dags, pulling plug cock core, etc.. Special plant safety regulations apply in' these cases-
\(U 0307731