Document VKoxb6oEnk0J5zNgYRXJNBeyg
Matr'i
TSTRA ETHEL LEAS PLAHT
February 13, 1931
DR. W. S. DEUEL:
A series of experiments was made in 3 Plant r?o determine tbe 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 cloor 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 Quite 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 stattding'exect 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 blagging 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..
c0.o1
r-
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
o of new mechanical safeguards,improved equipment, and effective
o CO
safety education of the operating and mechanical departments. Attempts to stills further reduce the hazard of lead exposure are
being made and other series of teats will be conducted periodically,
iiZ
J. L. STSCHSR, SOFT.
sic/ICR'
Place
Time of Hun
B Bide.
First Floor
By centrifugal Pump
i)
ft
Lewis Pump #1 (top)
S Jars. 24 24 fo 4 a
i! " #1 (top) 24 a * a r (top) 24 a J! ' #1 (bottom) 4 a ft i* 1 { ft \ 24
" 9 fZ } 24
Second Floor; Filters
ti
rt
i! A Si
Lei!-?gh Tank 36
?
24 K 24 Si
ft
s 51 24 24 a
24 A ?!
24
Third Floor; Top ;16 ;.'l6 rl6 vlS
vl5 #15 #15 #15
m#14
-
#13 Floor by #15
a tt * a it it
Fourth Floor; Inside enclosure 15
a fi g
55 1$ a a
8 By door
encl*osure113155
n-
13
w
13
a*
13
Floor bet.13-13
apO/*S
it vt
24 1
c.*r a
24 ii
24 ft
24
24
24 ft
ft
24 ii
1.6 ft
24 M
24 ft
48 ft
46
8S
16 ft
24 t!
24 ft
24 ft
2a
24 a
48
24 a
8S
a
24 a
Vol.of Air
Amount of Lead
480 1440
litaers
l44o
1440 u
l44o a
1440 it
1440 ii
1440
1440 a
>.0001 grams
.0001
.Q005
.0010
..00p0
0010
.coc5
.ooos
>.0001
l44o 1440 1440
4S0 x44o l44o
1440
1440 1440 1440
I
a
ft
t? s
a a
if n ii
.0001 >.0001
.0005
< .0500 >.0001
. 0002
>.0001 .0050
>.0001
>.0001
456600
1440 1440
1440 l44o 1440 1440 l44o
480
l440
.960 1440 X44c 2880 2880
ti J*
ft
ft
ft
aft e if u si n Si a
'480
^60
1440 1443 1440
120 1440 2880 1440
480 480 1440
ft tt a a ti a a
ft
ft
ft
. 0010 . 0010
. C005 .0050 .0050
. 0100
..00001100 .0050 .0005 .0005
.0001 .0100
.0050 ..00005100
.0050 <.0500 <..00510000 <.0500 <.0500
. 0100
.0500 .0100 .0050 .0500
.0010
>
.
[t
Flftb Floor;
ir Suoi by 15
* 15
a
"
1133
Floor bet. 15-13
" 15-13 * X3-1X
* 13-11
24
24 24 24 24 24
24
Alloy Bldtg. "T rsi Floor: Grlnder Tbrusbm*)
H 1!
ti
a
a
2 24 24' 24 24
8 8-
Seccmd Floori
Pa8n
&y
grlnder
11
8
a
': ,
2 2
2 8' 16
Fot roo, #2
#.
o
n' ii
"&4-
-"D 8 #6
24 24 24 24 24 24
B 24
f O n ' #6
24 24
O
Flo#or by co8oler
24 24
0
pan
2lk4
H K
bet.pct
roo
li
-1&2 24
24 24
1440 1440 1440 1440 1440
1440 1440
120 14 1440 144o 144o
4S0
km
keo
120
4S0
49800
1440 144-0 1440 144o 1440 1440 1440 1440 l44o 1440 l44o 144o l44o 1440 1440
>.0001 >..0CC0Q015
>.0001
>.0001 *V>'U V /A.
y a>01
W \ 't jf ** .
JUUOI f .u u u y
0001
w
, 0010
*w
.ooox
.0010
> . OCOI >.0001
>>..00000011
. 0010
.0050
. 0010 . 0001
.0005 .oaos .0010 ..00010500 .0010
>. 0001
..00001005
.0100
-
Place
Tisae of Run
Floor bet.pet roos3l-2 `4- hours
toTpop Fplootor#1 #2
#6
24 pi.
cSv 24 24
Saisiter
ringing table (front) 24 1* H * 24
" * (back) 24
Slugging door
24
24
kludge pit door
;t M 1*
S4 24
Bucket control roo 24
!i< `
7!
24
Dross not
24
24
?
Vol. of Air
l44o
Afflouat of Lead < .QpCO
1440 1440 l44o 1440
1440
* <w* V W
-0001
.0003
Wr.''V#'V>r-tSm .0010
l440 1440 l440
1440 1440 1440
1440 1440
1440 1440 1440
.0010
->..000X0010 <0^00 old hood
-000.3 new
. 0010 -0001
>.0001 >.0003 <.0300
.0050
-..2l.S.--__________________ _______ _____
top air duct fop furnace Top stringer Floor ~
% head 13.0 421023^..000
Top grinder hood
74.0
Office floor First floor
oO.O
1?.0
.Second floor
7S.D
Third-floor
. 23-0
Air ducts t n
((21dst
floor) )
-* * (3d * )
46.0
32.0 13.0
Special conditions such as changing, filter Dags, pulling plug cock core, etc. Special plant safety regulations apply in thse cases.
K g 000773 i